Other definitive proxy statements


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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.     )

Filed by the Registrant x Filed by a Party other than the Registrant ¨

Check the appropriate box:

¨ Preliminary Proxy Statement
¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
x Definitive Proxy Statement
¨ Definitive Additional Materials
¨ Soliciting Material Pursuant to §240.14a-12

Infinity Pharmaceuticals, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x No fee required.
¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
(1)

Title of each class of securities to which transaction applies:

(2)

Aggregate number of securities to which transaction applies:

(3)

Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

(4)

Proposed maximum aggregate value of transaction:

(5)

Total fee paid:

¨ Fee paid previously with preliminary materials.
¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
(1)

Amount Previously Paid:

(2)

Form, Schedule or Registration Statement No.:

(3)

Filing Party:

(4)

Date Filed:


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LOGO

780 Memorial Drive

Cambridge, MA 02139

Tel: 617-453-1000

Fax: 617-453-1001

www.infi.com

April 28, 2014

Dear Stockholder:

You are cordially invited to attend our 2014 annual meeting of stockholders to be held at 8:30 a.m. local time on Tuesday, June 17, 2014, at The Charles Hotel, One Bennett Street, Cambridge, Massachusetts 02138.

The Notice of Annual Meeting and Proxy Statement that accompany this letter describe the items to be voted on at the annual meeting. We hope you will be able to attend and participate in the meeting. Whether or not you plan to attend, please review the accompanying materials carefully and take the time to cast your vote – it is important that your shares be represented and voted at the meeting.

On behalf of your Board of Directors and our community of Citizen-Owners, we would like to thank you for your continued support of, and interest in, Infinity.

Yours sincerely,

LOGO

Adelene Q. Perkins

Chair of the Board, President and Chief Executive Officer


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INFINITY PHARMACEUTICALS, INC.

780 Memorial Drive

Cambridge, Massachusetts 02139

NOTICE OF 2014 ANNUAL MEETING OF STOCKHOLDERS

To Be Held on June 17, 2014

To Our Stockholders:

We invite you to our 2014 annual meeting of stockholders, which will be held at The Charles Hotel, One Bennett Street, Cambridge, Massachusetts 02138, on Tuesday, June 17, 2014 at 8:30 a.m., local time. At the meeting, stockholders will consider and vote upon the following matters:

1. the election of nine directors to serve for a one-year term expiring at the 2015 annual meeting of stockholders;

2. an advisory (non-binding) vote on executive compensation;

3. the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2014; and

4. the transaction of such other business as may properly come before the meeting or any adjournment thereof.

Stockholders of record as of April 21, 2014 will be entitled to notice of and to vote at the annual meeting or any adjournment thereof. Our stock transfer books will remain open for the purchase and sale of our common stock.

If you are a stockholder of record, you may submit your proxy (1) over the Internet at www.proxyvote.com, (2) by telephone at 1-800-690-6903, or (3) by mail, or you may vote in person at the meeting. For specific instructions, please refer to the second page of the accompanying proxy statement and the instructions on the proxy card relating to the annual meeting. Proxies submitted over the Internet or by telephone must be received by 11:59 p.m. EDT on June 16, 2014.

If you are a stockholder whose shares are held in “street name” by a bank or brokerage firm, your bank or brokerage firm will provide you a vote instruction form with this proxy statement, which you may use to direct how your shares will be voted. You must instruct your broker how to vote with respect to the election of directors (Proposal No. 1) and the advisory vote on executive compensation (Proposal No. 2); your broker cannot exercise its discretion to vote on these proposals on your behalf. Many banks and brokerage firms also offer the option of voting over the Internet or by telephone, instructions for which would be provided by your bank or brokerage firm on your vote instruction form.

We hope that you will attend the annual meeting. Whether or not you plan to attend, we urge you to vote your shares over the Internet or by telephone, or to complete, date, sign and return the enclosed proxy card in the accompanying postage-prepaid envelope. A prompt response will greatly facilitate arrangements for the meeting, and your cooperation is appreciated. Stockholders who attend the meeting may vote their stock personally, even if they have previously submitted their proxies.

By Order of the Board of Directors,
LOGO
Lawrence E. Bloch
Executive Vice President, Chief Financial Officer and Chief Business Officer, Secretary and Treasurer

Cambridge, Massachusetts

April 28, 2014


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TABLE OF CONTENTS

Page

IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS

1

INFORMATION ABOUT THE ANNUAL MEETING AND VOTING

1

STOCKHOLDERS SHARING THE SAME ADDRESS

6

STOCK OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

7

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

9

PROPOSAL 1—ELECTION OF DIRECTORS

9

Director Qualifications

10

CORPORATE GOVERNANCE

14

General

14

Corporate Governance Guidelines; Code of Conduct and Ethics

14

Determination of Independence

14

Director Candidates: Criteria and Diversity

15

Communications from Stockholders

16

Board and Committee Meetings

16

Board’s Role in Risk Oversight

19

Risk Considerations in our Compensation Program

20

Availability of Corporate Governance Materials

20

Audit Committee Report

20

Audit Fees

21

Director Compensation

22

TRANSACTIONS WITH RELATED PERSONS

25

POLICIES AND PROCEDURES FOR RELATED PERSON TRANSACTIONS

26

COMPENSATION OF EXECUTIVE OFFICERS

27

Compensation Discussion and Analysis

27

Summary Compensation Table

41

Grants of Plan-Based Awards Table

42

Outstanding Equity Awards at Fiscal Year-End Table

42

Option Exercises and Stock Vested Table

43

Potential Payments upon Termination or Change in Control

43

Securities Authorized for Issuance under Equity Compensation Plans

44

Compensation Committee Interlocks and Insider Participation

45

Compensation Committee Report

45

PROPOSAL 2—ADVISORY VOTE ON THE COMPENSATION OF OUR NAMED EXECUTIVE OFFICERS

45

PROPOSAL 3—RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

46

OTHER MATTERS

47

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INFINITY PHARMACEUTICALS, INC.

780 Memorial Drive

Cambridge, Massachusetts 02139

PROXY STATEMENT FOR 2014 ANNUAL MEETING OF STOCKHOLDERS

To Be Held on June 17, 2014

This proxy statement contains information about our 2014 annual meeting of stockholders. The meeting will be held on Tuesday, June 17, 2014, beginning at 8:30 a.m. local time, at The Charles Hotel, One Bennett Street, Cambridge, Massachusetts 02138. You may obtain directions to the location of the annual meeting by contacting Jaren Irene Madden in our investor relations department. She may be contacted at 780 Memorial Drive, Cambridge, Massachusetts 02139; telephone: 617-453-1336; e-mail: irpr_info@infi.com.

This proxy statement is furnished in connection with the solicitation of proxies by our board of directors for use at the annual meeting and at any adjournment of that meeting. All proxies will be voted in accordance with the instructions they contain. If you do not specify your voting instructions on your proxy, it will be voted in accordance with the recommendations of our board of directors. You may revoke your proxy at any time before it is exercised at the meeting by giving our corporate secretary, Lawrence E. Bloch, written notice to that effect. He may be contacted at 780 Memorial Drive, Cambridge, Massachusetts 02139; telephone: 617-453-1122; e-mail: Lawrence.Bloch@infi.com.

These proxy materials, together with our annual report to stockholders for our 2013 fiscal year, are first being mailed to stockholders on or about April 28, 2014.

Important Notice Regarding the Availability of Proxy Materials for

the Annual Meeting of Stockholders to be Held on June 17, 2014:

This proxy statement and the 2013 annual report to stockholders are available for

viewing, printing and downloading at www.infi.com/proxy.

INFORMATION ABOUT THE ANNUAL MEETING AND VOTING

Q.     What is the purpose of the annual meeting?

A. At the annual meeting, stockholders will consider and vote on the following matters:

1.      the election of nine directors to serve for a one-year term expiring at the 2015 annual meeting of stockholders;

2.      an advisory (non-binding) vote on executive compensation;

3.      the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2014; and

4.      the transaction of such other business as may properly come before the meeting or any adjournment thereof.

Q.     Who can vote?

A. To be able to vote, you must have been a stockholder of record at the close of business on April 21, 2014. This date is the record date for the annual meeting.

Stockholders of record at the close of business on April 21, 2014 are entitled to vote on each proposal at the annual meeting. The number of outstanding shares entitled to vote on each proposal at the meeting is 48,542,517 shares of our common stock.

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Q.     How many votes do I have?

A. Each share of our common stock that you owned on the record date entitles you to one vote on each matter that is voted on.

Q.     Is my vote important?

A.     Your vote is important no matter how many shares you own. Please take the time to vote. Take a moment to read the instructions below. Choose the way to vote that is easiest and most convenient for you and cast your vote as soon as possible.

Q.     How do I vote?

A. If you are the “record holder” of your shares, meaning that you own your shares in your own name and not through a bank or brokerage firm, you may vote in one of four ways:

1. You may vote over the Internet . If you have Internet access, you may vote your shares from any location in the world at www.proxyvote.com, by following the instructions on that site or on the “Vote by Internet” instructions on the enclosed proxy card.

2. You may vote by telephone . You may vote your shares by calling
1-800-690-6903 and following the instructions provided, or following the “Vote by Phone” instructions on the enclosed proxy card.

3. You may vote by mail . You may vote by completing and signing the proxy card enclosed with this proxy statement and promptly mailing it in the enclosed postage-prepaid envelope. You do not need to put a stamp on the enclosed envelope if you mail it from the United States. The shares you own will be voted according to your instructions on the proxy card you mail. If you return the proxy card, but do not give any instructions on a particular matter described in this proxy statement, the shares you own will be voted in accordance with the recommendations of our board of directors.

4. You may vote in person . If you attend the meeting, you may vote by delivering your completed proxy card in person or by completing a ballot. Ballots will be available at the meeting.

Our board of directors recommends that you vote “FOR” each of the nominees for director and “FOR” Proposals 2 and 3.

Q.     Can I change my vote after I have mailed my proxy card or after I have voted my shares over the Internet or by telephone?

A. Yes. You can change your vote and revoke your proxy at any time before the polls close at the meeting. To do so you must do one of the following:

1.      Sign another proxy card with a later date;

2.      Give our corporate secretary written notice before or at the meeting that you want to revoke your proxy; or

3.      Vote in person at the meeting.

Yourattendance at the meeting alone will not change your vote or revoke your proxy.

Q.     Can I vote if my shares are held by a bank or brokerage firm in “street name”?

A. If the shares you own are held in the name of a bank or brokerage firm, also known as “street name,” that bank or brokerage firm, as the record holder of your shares, is required to vote your shares according to your instructions. In order to vote your shares held in “street name,” you will need to follow the directions your bank or brokerage firm provides you. Many brokers also offer the option of voting over the Internet or by telephone, instructions for which would be provided by your bank or brokerage firm on your vote instruction form.

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If you do not give instructions to your bank or brokerage firm, it will still be able to vote your shares with respect to certain “discretionary” items. The ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm (Proposal No. 3) is such a “discretionary item.” However, your bank or brokerage firm will not be allowed to vote your shares with respect to certain “non-discretionary” items. The election of directors (Proposal No. 1) and the advisory vote on executive compensation (Proposal No. 2) are both “non-discretionary” items. If you do not instruct your bank or brokerage firm how to vote with respect to such “non-discretionary” items, your bank or brokerage firm will not vote with respect to those proposals and those votes will be counted as “broker non-votes.” “Broker non-votes” are shares that are held in street name by a bank or brokerage firm that indicates on its proxy that it does not have or did not exercise discretionary authority to vote on a particular matter.

If your shares are held in street name, you must bring an account statement or letter from your bank or brokerage firm showing that you are the beneficial owner of the shares as of the record date (April 21, 2014) in order to vote those shares at the meeting. To be able to vote your shares held in street name at the meeting, you will need to obtain a proxy card from your bank or brokerage firm.

Q.     How do I vote my 401(k) shares?

A. If you participate in the Infinity Pharmaceuticals Stock Fund through our company’s 401(k) Plan and Trust, or 401(k) Plan, your proxy will also serve as a voting instruction for Principal Trust Company, or Principal, which serves as trustee of the 401(k) Plan, with respect to shares of our common stock held in your 401(k) Plan account, or 401(k) Plan shares, as of the record date. You should sign the proxy card and return it in the enclosed envelope to Broadridge Financial Solutions, Inc., or you may submit your proxy over the Internet or by telephone by following the instructions on the enclosed proxy card. Broadridge will notify Principal of the manner in which you have directed your 401(k) Plan shares to be voted. Principal will vote your 401(k) Plan shares as of the record date in the manner that you direct. If Broadridge does not receive your voting instructions from you by 11:59 p.m. eastern time on June 12, 2014, Principal will not vote your 401(k) Plan shares.

Q.     What constitutes a quorum?

A. In order for business to be conducted at the meeting, a quorum must be present in person or represented by valid proxies. For each of the proposals to be presented at the meeting, a quorum consists of the holders of a majority of the shares of common stock issued and outstanding on April 21, 2014, the record date, or at least 24,271,259 shares.

Shares of common stock represented in person or by proxy (including broker non-votes and shares that abstain or do not vote with respect to a particular proposal to be voted upon) will be counted for the purpose of determining whether a quorum exists at the meeting for that proposal.

If a quorum is not present, the meeting will be adjourned until a quorum is obtained.

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Q.     What vote is required for each item, and how will votes be counted?

A. Each share of common stock will be counted as one vote according to the instructions contained on a proper proxy card, whether submitted in person, by mail, over the Internet or by telephone, or on a ballot voted in person at the meeting.

Election of directors. Under our bylaws, a nominee will be elected to our board of directors if the votes cast “for” the nominee’s election exceed the votes cast “against” the nominee’s election. Abstentions and broker non-votes do not count as votes “for” or “against” and therefore have no effect on the outcome of the voting. If the shares you own are held in street name by a bank or brokerage firm, that bank or brokerage firm, as the record holder of your shares, is required to vote your shares according to your instructions. If you do not instruct your bank or brokerage firm how to vote with respect to this proposal, your bank or brokerage firm will not vote with respect to this proposal . If an uncontested incumbent director nominee receives a majority of votes “against” his election, the director must tender a resignation from our board. Our board of directors, acting through the Nominating and Corporate Governance Committee, will then decide whether to accept the resignation or other action should be taken. We will publicly disclose our board’s decision and its reasoning with regard to the tendered resignation.

Advisory Vote on the Compensation of our Named Executive Officers. The approval of the advisory vote on the compensation of our named executive officers requires the affirmative vote of the holders of a majority in voting power of shares present at the annual meeting, in person or by proxy, and entitled to vote on the proposal. Abstentions will have the same effect as votes against this proposal. If you do not instruct your bank or brokerage firm how to vote with respect to this item, your bank or brokerage firm will not vote with respect to this proposal. Such broker non-votes will have the same effect as votes against this proposal.

Ratification of the appointment of our independent registered public accounting firm. Under our bylaws, the affirmative vote of a majority in total voting power of shares of stock present in person at the annual meeting or by proxy and entitled to vote on the proposal is needed to ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2014. If the shares you own are held in street name by a bank or brokerage firm, that bank or brokerage firm, as the record holder of your shares, is required to vote your shares according to your instructions. If you do not provide instructions, the bank or brokerage firm may vote your shares or leave them unvoted resulting in a broker non-vote. These broker non-votes will have no effect on the outcome of the voting. If you vote to “abstain” from voting, your shares will not be voted “for” or “against” the proposal, which has the same effect as a vote against the proposal.

Q.     Who will count the votes?

A. The votes will be counted, tabulated and certified by Broadridge Financial Solutions, Inc.

Q.     Will my vote be kept confidential?

A. Yes, your vote will be kept confidential and we will not disclose your vote, unless (1) we are required to do so by law (including in connection with the pursuit or defense of a legal or administrative action or proceeding), or (2) there is a contested election for the board of directors. The inspector of election will forward any written comments that you make on the proxy card to management without providing your name, unless you expressly request disclosure on your proxy card.

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Q.     How does the board of directors recommend that I vote on the proposals?

A. Our board of directors recommends that you vote:

FOR the election of each of the nine nominees to serve on our board of directors, each for a one year term;

FOR the approval, on an advisory (non-binding) basis, of the compensation of our named executive officers;

FOR the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2014.

Q.     Will any other matters be voted on at this meeting?

A. We do not know of any other matters that may come before the meeting. If any other matters are properly presented at the meeting, the persons named on the accompanying proxy card intend to vote, or otherwise act, in accordance with their judgment on those matters. Our bylaws establish the process for a stockholder to bring a matter before a meeting. See the question “How and when may I submit a stockholder proposal, including a stockholder nomination for director, for the 2015 annual meeting?” below.

Q.     Where can I find the voting results?

A. We will report the voting results in a Form 8-K filed with the U.S. Securities and Exchange Commission, or SEC, within four business days after the end of our annual meeting.

Q.     How and when may I submit a stockholder proposal, including a stockholder nomination for director, for the 2015 annual meeting?

A. In accordance with the rules of the SEC, if you are interested in submitting a proposal to be included in the proxy statement for our 2015 annual meeting of stockholders, we must receive your proposal, addressed to Lawrence E. Bloch, M.D., J.D., Company Secretary, Infinity Pharmaceuticals, Inc., 780 Memorial Drive, Cambridge, Massachusetts 02139, no later than December 29, 2014.

In addition, our bylaws require that we be given advance written notice for nominations for election to our board of directors and other matters that stockholders wish to present for action at an annual meeting other than those to be included in our proxy statement. We must receive such proposals not later than the close of business on March 19, 2015, nor earlier than the close of business on February 17, 2015. If the date of our 2015 annual meeting of stockholders is before May 18, 2015 or after August 26, 2015, we must receive such proposals not earlier than the close of business on the 120 th day prior to the 2015 annual meeting of stockholders nor later than the tenth day following the date of the first public announcement of such meeting. To submit a proposal, a stockholder must send a notice containing the supporting information set forth in our bylaws to Dr. Bloch at the address provided above.

Q.     Who will bear the costs of soliciting these proxies?

A. We will bear the costs of solicitation of proxies. In addition to these proxy materials, our directors, officers and employees may solicit proxies by telephone, e-mail, facsimile and in person, without additional compensation. We will request brokers, custodians and fiduciaries to forward proxy soliciting material to the owners of shares of our common stock that they hold in their names. We will reimburse brokers, custodians and fiduciaries for their reasonable out-of-pocket expenses incurred in connection with the distribution of our proxy materials.

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Q.     How can I obtain an Annual Report on Form 10-K?

A. Our annual report on Form 10-K for the fiscal year ended December 31, 2013 is available on our website at www.infi.com. If you would like a copy of our annual report on Form 10-K, including the financial statements, or any of its exhibits, we will send you one without charge. Please contact Jaren Irene Madden in our investor relations department. She may be contacted at 780 Memorial Drive, Cambridge, Massachusetts 02139; telephone:
617-453-1336; e-mail: irpr_info@infi.com.

Q.     Whom should I contact if I have any questions?

A. If you have any questions about the annual meeting or your ownership of our common stock, please contact Jaren Irene Madden in our investor relations department. She may be contacted at 780 Memorial Drive, Cambridge, Massachusetts 02139; telephone: 617-453-1336; e-mail: irpr_info@infi.com.

STOCKHOLDERS SHARING THE SAME ADDRESS

Some banks, brokers and other nominee record holders may be participating in the practice of “householding” proxy statements and annual reports. This means that only one copy of our proxy statement and annual report to stockholders may have been sent to multiple stockholders in your household. We will promptly deliver a separate copy of either document to you if you write or call Jaren Irene Madden in our investor relations department. She may be contacted at 780 Memorial Drive, Cambridge, Massachusetts 02139; telephone: 617-453-1336; e-mail: irpr_info@infi.com. If you want to receive separate copies of the proxy statement or annual report to stockholders in the future, or if you are receiving multiple copies and would like to receive only one copy for your household, you should contact your bank, broker or other nominee record holder, or you may contact us at the above address and telephone number.

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STOCK OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The following table contains information regarding the beneficial ownership of our common stock as of April 1, 2014 by:

•

stockholders we know to beneficially own more than 5 percent of our outstanding common stock;

•

each of our current directors and nominees for director named in this proxy statement;

•

each of our executive officers named in the Summary Compensation Table included in this proxy statement; and

•

all of our current directors and executive officers as a group.

Name and Address of Beneficial Owner(1)

Number of
Shares of
Common Stock
Owned
+ Common Stock
Underlying
Options and Other
Rights
Acquirable
Within  60 Days
(2)
= Total
Beneficial
Ownership
(#)
Percentage
of Common
Stock
Beneficially
Owned (%)
(3)

5% Stockholders

Entities affiliated with Deerfield Management Company, L.P.(4)

4,181,743 1,000,000 5,181,743 10.5 %

Entities affiliated with Samuel D. Isaly (Orbimed Advisors LLC and Orbimed Capital LLC)(5)

4,794,300 — 4,794,300 9.9 %

Blackrock, Inc.(6)

4,035,180 — 4,035,180 8.3 %

FMR LLC(7)

3,948,159 — 3,948,159 8.1 %

Entities affiliated with Steven A. Cohen(8)

3,605,500 — 3,605,500 7.4 %

Entities affiliated with The Goldman Sachs Group, Inc.(9)

3,028,926 — 3,028,926 6.2 %

Vanguard(10)

2,538,194 — 2,538,194 5.2 %

Directors

Adelene Q. Perkins(11)

453,752 1,132,487 1,586,239 3.2 %

Jose Baselga

— — — *

Jeffrey Berkowitz

— — — *

Anthony B. Evnin, Ph.D.(12)

179,851 61,125 240,976 *

Gwen A. Fyfe, M.D.

— 31,000 31,000 *

Eric S. Lander, Ph.D.(13)

82,758 68,585 151,343 *

Norman C. Selby

10,000 33,000 43,000 *

Ian F. Smith

— 70,875 70,875 *

Michael C. Venuti, Ph.D.

56,250 92,125 148,375 *

Other Named Executive Officers

Julian Adams, Ph.D.(14)

262,945 776,373 1,039,318 2.1 %

Lawrence E. Bloch, M.D., J.D.(15)

744 105,283 106,027 *

Vito J. Palombella, Ph.D.(16).

6,147 370,896 377,043 *

Pedro Santabarbara, M.D., Ph.D.(17)

118 — 118 *

All current directors and executive officers as a group (13 persons)

1,052,729 2,750,526 3,803,255 7.4 %

* Represents holdings of less than one percent.
(1) Unless otherwise indicated, the address for each person is to the care of Infinity Pharmaceuticals, Inc., 780 Memorial Drive, Cambridge, Massachusetts 02139.
(2)

The number of shares of our common stock owned by each person is determined under the rules of the Securities and Exchange Commission, or SEC, and the information is not necessarily indicative of beneficial ownership for any other purpose. Under these rules,

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beneficial ownership includes any shares as to which the individual has sole or shared voting power or investment power and also any shares which the individual has the right to acquire within 60 days after April 1, 2014 through the exercise of any stock option or other right.
(3) Percentage of beneficial ownership is based on 48,518,382 shares of our common stock outstanding as of April 1, 2014. In addition, shares of common stock subject to options or other rights currently exercisable, or exercisable within 60 days of April 1, 2014, are deemed outstanding and beneficially owned for the purpose of computing the percentage beneficially owned by (i) the individual holding such options or other rights (but not any other individual) and (ii) the directors and executive officers as a group.
(4) Consists of 1,833,092 shares held by Deerfield Partners, L.P, 2,348,651 shares held by Deerfield International Master Fund, L.P. and 3,000,000 shares of common stock issuable upon the exercise of currently exercisable warrants. Deerfield Mgmt, L.P., Deerfield Management Company, L.P, and James E. Flynn claim shared voting power and shared dispositive power of 4,181,743 shares. Deerfield Partners, L.P claims shared voting power and shared dispositive power of 1,833,092 shares. Deerfield International Master Fund, L.P claims shared voting power and shared dispositive power of 2,348,651 shares. The address of the principal business office of James E. Flynn, Deerfield Mgmt, L.P., Deerfield Management Company, L.P., Deerfield Partners, L.P., Deerfield International Master Fund, L.P. is 780 Third Avenue, 37th Floor, New York, NY 10017. For information regarding James E. Flynn, Deerfield Mgmt, L.P., Deerfield Management Company, L.P., Deerfield Partners, L.P., Deerfield International Master Fund, L.P. we have relied on the Schedule 13G/A filed by James E. Flynn, Deerfield Mgmt, L.P., Deerfield Management Company, L.P., Deerfield Partners, L.P., Deerfield International Master Fund, L.P. with the SEC on February 14, 2014.
(5) Samuel D. Isaly claims beneficial ownership, shared voting and shared dispositive power of 4,794,300 shares of which Orbimed Advisors LLC claims beneficial ownership, shared voting and shared dispositive power of 1,766,600 shares, and Orbimed Capital LLC claims beneficial ownership, shared voting and shared dispositive power of 3,027,700 shares. The address of the principal business offices of Samuel D. Isaly, Orbimed Advisors LLC and Orbimed Capital LLC is 601 Lexington Avenue, 54th Floor, New York, NY 10022. For information regarding Samuel D. Isaly, Orbimed Capital LLC and Orbimed Advisors LLC we have relied on the Schedule 13G filed jointly by Samuel D. Isaly, Orbimed Advisors LLC and Orbimed Capital LLC with the SEC on February 13, 2014.
(6) Blackrock, Inc. claims sole voting power of 3,863,871 shares and sole dispositive power of 4,035,180 shares. The address of Blackrock, Inc. is 40 East 52nd Street, New York, NY 10022. For information regarding Blackrock, Inc. we have relied on the Schedule 13G filed by Blackrock, Inc. with the SEC on January 29, 2014.
(7) Fidelity Management & Research Company, or Fidelity, a wholly-owned subsidiary of FMR LLC and an investment adviser registered under Section 203 of the Investment Advisers Act of 1940, is the beneficial owner of 2,248,574 shares of common stock as a result of acting as investment adviser to various investment companies, or the Fidelity Funds, registered under Section 8 of the Investment Company Act of 1940. Each of Edward C. Johnson III and FMR LLC, through its control of Fidelity and the Fidelity Funds has power to dispose of the 2,248,574 shares owned by the Fidelity Funds. Fidelity SelectCo, LLC, or SelectCo, a wholly-owned subsidiary of FMR LLC and an investment adviser registered under Section 203 of the Investment Advisers Act of 1940, is the beneficial owner of 1,633,567 shares of common stock as a result of acting as investment adviser to various investment companies, or the SelectCo Funds, registered under Section 8 of the Investment Company Act of 1940. Edward C. Johnson 3d and FMR LLC, through its control of SelectCo, and the SelectCo Funds each has sole power to dispose of the 1,633,567 owned by the SelectCo Funds. Through their ownership of voting common shares and a shareholders’ voting agreement, members of the Johnson family may be deemed to form a controlling group with respect to FMR LLC. Neither FMR LLC nor Edward C. Johnson III, Chairman of FMR LLC, has the sole power to vote or direct the voting of the shares owned directly by the Fidelity Funds, which power resides with the Fidelity Funds’ Boards of Trustees. Fidelity carries out the voting of the shares under written guidelines established by the Fidelity Funds’ Boards of Trustees. The address of FMR LLC is 245 Summer Street, Boston, Massachusetts, 02210. Pyramis Global Advisors, LLC, or PGALLC, 900 Salem Street, Smithfield, Rhode Island, 02917, an indirect wholly-owned subsidiary of FMR LLC and a bank as defined in Section 3(a)(6) of the Securities Exchange Act of 1934, is the beneficial owner of 8,618 shares of common stock as a result of its serving as investment manager of institutional accounts owning such shares. Edward C. Johnson III and FMR LLC, through its control of PGALLC, each has sole dispositive power over and sole power to vote or to direct the voting of 8,618 shares of common stock owned by the institutional accounts managed by PGALLC as reported above. Pyramis Global Advisors Trust Company, or PGATC, 900 Salem Street, Smithfield, Rhode Island, 02917, an indirect wholly-owned subsidiary of FMR LLC and a bank as defined in Section 3(a)(6) of the Securities Exchange Act of 1934, is the beneficial owner of 57,400 shares of common stock as a result of its serving as investment manager of institutional accounts owning such shares. Edward C. Johnson III and FMR LLC, through its control of PGATC, each has sole dispositive power over and sole power to vote or to direct the voting of 57,400 shares of common stock owned by the institutional accounts managed by PGATC as reported above. For information regarding FMR LLC we have relied on the Schedule 13G/A filed by FMR LLC with the SEC on February 14, 2014.
(8) Steven A. Cohen claims beneficial ownership of 3,605,500 shares of our common stock of which S.A.C. Capital Advisors, L.P. and S.A.C. Capital Advisors, Inc. each claim beneficial ownership of 3,555,500 shares, S.A.C. Capital Associates, LLC claims beneficial ownership of 3,500,000 shares, and Sigma Capital Management, LLC claims beneficial ownership of 50,000 shares. The address of the principal business office of (i) S.A.C. Capital Advisors L.P., S.A.C. Capital Advisors, Inc., CR Intrinsic Investors, LLC and Mr. Cohen is 72 Cummings Point Road, Stamford, Connecticut 06902; (ii) S.A.C Capital Associates is Mitchell House, The Valley, Anguilla, British West Indies; and (iii) Sigma Capital Management, LLC is 510 Madison Avenue, New York, New York 10022. For information regarding Steven A. Cohen, S.A.C. Capital Advisors L.P., S.A.C. Capital Advisors, Inc., S.A.C. Capital Associates, LLC, and Sigma Capital Management, LLC we have relied on the Schedule 13G filed jointly by S.A.C. Capital Advisors, L.P., S.A.C. Capital Advisors, Inc., S.A.C. Capital Associates, LLC, CR Intrinsic Investors, LLC, Sigma Capital Management, LLC and Steven A. Cohen with the SEC on February 14, 2014.

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(9) Goldman Sachs Asset Management, L.P., together with GS Investment Strategies, LLC, or Goldman Sachs Asset Management, claims shared voting power of 2,850,369 shares and shared dispositive power of 3,028,926 shares. The address of Goldman Sachs Asset Management is 200 West Street, New York, NY 10282. For information regarding Goldman Sachs Asset Management, we have relied on the Schedule 13G filed by Goldman Sachs Asset Management with the SEC on February 13, 2014.
(10) The Vanguard Group claims sole voting power of 68,172 shares, sole dispositive power of 2,471,422 shares and shared dispositive power of 66,772 shares. The address of The Vanguard Group is 100 Vanguard Blvd., Malvern, PA 19355. For information regarding The Vanguard Group we have relied on the Schedule 13G filed by The Vanguard Group with the SEC on February 11, 2014.
(11) Includes 6,217 shares of common stock held in Ms. Perkin’s 401(k) Plan account.
(12) Includes 20,219 shares of common stock held by Venrock Associates, L.P., 89,982 shares of common stock held by Venrock Associates III, L.P. and 2,250 shares of common stock held by Venrock Entrepreneurs Fund III, L.P. Venrock Associates, L.P. is a limited partnership of which Dr. Evnin is a General Partner. Dr. Evnin shares voting and investment power with respect to securities held of record by Venrock Associates with the General Partners of Venrock Associates. Venrock Associates III, L.P. is a limited partnership of which Venrock Management III, LLC is the General Partner. Dr. Evnin is a Member of Venrock Management III, LLC and shares voting and investment power with the Members of Venrock Management III, LLC with respect to securities held of record by Venrock Associates III, L.P. Venrock Entrepreneurs Fund III, L.P. is a limited partnership of which VEF Management III, LLC is the General Partner. Dr. Evnin is a Member of VEF Management III, LLC and shares voting and investment power with the Members of VEF Management III, LLC with respect to securities held of record by Venrock Entrepreneurs Fund III, L.P. Dr. Evnin disclaims beneficial ownership of all such securities listed above, except to the extent of his pecuniary interest therein. The address of Venrock is 530 Fifth Avenue, 22nd Floor, New York, New York 10036. For information regarding Venrock Associates, Venrock Associates III, L.P. and Venrock Entrepreneurs Fund III, L.P. we have relied on the Form 4 filed by Dr. Evnin with the SEC on December 4, 2013.
(13) Consists of 71,707 shares of common stock held by Dr. Lander and 11,051 shares of common stock held by a trust for which Dr. Lander serves as a trustee. Dr. Lander shares voting and investment power with the other trustee over the shares held by this trust.
(14) Consists of shares held by a trust for which Dr. Adams serves as trustee and has voting and investment power.
(15) Consists of 744 shares of common stock held in Dr. Bloch’s 401(k) Plan account.
(16) Consists of 6,147 shares of common stock held in Dr. Palombella’s 401(k) Plan account.
(17) Includes 118 shares of common stock held in Dr. Santabarbara’s 401(k) Plan account.

SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the Securities Exchange Act of 1934, or Exchange Act, requires our directors, officers and holders of more than 10 percent of our common stock to file with the SEC initial reports of ownership and reports of changes in ownership of common stock and other of our equity securities. Based solely on our review of copies of Section 16(a) reports furnished to us and representations made to us, we believe that during the year ended December 31, 2013, our officers, directors and holders of more than 10 percent of our common stock complied with all Section 16(a) filing requirements.

PROPOSAL 1—ELECTION OF DIRECTORS

All of our directors stand for election annually. The board of directors has set the number of directors at nine. Unless you indicate otherwise on your proxy, the persons named in the accompanying proxy will vote to elect Messrs. Berkowitz, Selby and Smith; Drs. Baselga, Evnin, Fyfe, Lander and Venuti; and Ms. Perkins as directors to serve until our 2015 annual meeting of stockholders and until his or her successor is duly elected and qualified. Each of the nominees is currently a member of our board of directors, and each has indicated his or her willingness to serve if elected. In March 2014, upon the recommendation of our nominating and corporate governance committee, our board appointed Dr. Baselga and Mr. Berkowitz as new directors. Our nominating and corporate governance committee nominated Dr. Baselga and Mr. Berkowtiz following a review of their qualifications in light of the criteria for director nomination set forth in our Corporate Governance Guidelines. If any nominee should be unable to serve, however, the shares of common stock represented by proxies may be voted for a substitute nominee designated by the board of directors. Assuming all nominees are elected, our board of directors will consist of nine members immediately following our 2014 annual meeting. In accordance with our bylaws, any vacancy on our board of directors can be filled by the majority vote of the members of our board of directors.

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Director Qualifications

The following paragraphs provide information as of the date of this proxy statement about each nominee for director. The information presented includes information each nominee has given us about his or her age, all positions he or she holds, his or her principal occupation and business experience for the past five years, and the names of other publicly-held companies of which he or she currently serves as a director or has served as a director during the past five years. In addition to the information presented below regarding each nominee’s specific experience, qualifications, attributes and skills that led our board to the conclusion that he or she should serve as a director, we also believe that each of our director nominees has a reputation for integrity, honesty and adherence to high ethical standards. Each has demonstrated business acumen and an ability to exercise sound judgment, as well as a commitment of service to our company and our board. Finally, we value their significant experience on other public company boards of directors and board committees.

Information about the number of shares of common stock beneficially owned by each of the nominees for director appears above under the heading “ Stock Ownership of Certain Beneficial Owners and Management .” There are no family relationships between or among any of our officers, directors or nominees for director.

All registered trademarks used in the biographical information below are the property of their respective owners.

José Baselga, M.D., Ph.D., age 54, has served as a member of our board of directors since March 6, 2014. Dr. Baselga has served as Physician-in-Chief at Memorial Sloan-Kettering Cancer Center since January 2013. From 2010 to 2013, Dr. Baselga was Chief and Bruce A. Chabner Chair of the Division of Hematology/Oncology at Massachusetts General Hospital, or MGH, Associate Director of the MGH Cancer Center and Professor of Medicine at Harvard Medical School. From 1996 to 2010, Dr. Baselga was chairman of the Medical Oncology Service and director of the Division of Medical Oncology, Hematology and Radiation Oncology at the Vall d’Hebron Institute of Oncology in Barcelona, Spain. Dr. Baselga previously served as president of the European Society of Medical Oncology and served on the board of directors of the American Society of Clinical Oncology (ASCO) from 2003 to 2006. He also served on the board of directors of the American Association for Cancer Research (AACR) from 2008-2011 and was the Chairman of the 2013 AACR annual meeting. Dr. Baselga received his medical degree from the Universidad Autonoma of Barcelona in 1982. He did his Internal Medicine Residency at both Vall d’Hebron University Hospital in Barcelona, Spain and the State University of New York in the United States. He completed a fellowship in Medical Oncology at Memorial Sloan Kettering Cancer Center in New York. Dr. Baselga has published more than 300 peer-reviewed articles and 400 abstracts and book chapters in his career. We believe Dr. Baselga’s qualifications to serve on our board of directors include his substantial experience in the field of clinical oncology.

Jeffery Berkowitz, J.D., age 48, has served as a member of our board of directors since March 6, 2014. Mr. Berkowitz is president of Walgreens Boots Alliance Development GmbH and has been Senior Vice President of Pharmaceutical Development and Market Access of Walgreen Co., a publicly traded retail drug store since September 2010. As part of Walgreens’ strategic partnership with Alliance Boots, Mr. Berkowitz is responsible for the creation and development of a new joint venture company based in Europe. Mr. Berkowitz and his team lead all of Walgreens’ relations with branded and generic pharmaceutical manufacturers and related development programs worldwide, and also oversee Walgreens North American-based purchasing and branded pharmaceutical relationships. As the senior-most Walgreens executive residing outside of the United States, Mr. Berkowitz leads the global health and wellbeing efforts on the ground overseas. Prior to joining Walgreens, Mr. Berkowitz was Senior Vice President of global market access for Merck & Company, Inc., a publicly traded pharmaceutical company, from 2009 to 2010. In that role, he was accountable for all activity related to access, pricing, payer marketing, health outcomes and health technology assessments worldwide and a member of the Global Human Health and Emerging Markets leadership teams. From 2002 to 2009, Mr. Berkowitz held a variety of positions with increasing responsibility in market access, sales and marketing with Schering-Plough, a publicly traded pharmaceutical company, prior to its acquisition by Merck in 2009. In the past five years, Mr. Berkowitz has been on the board of directors for Physicians Interactive, a privately-held marketing

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organization, from 2010 to July 2013. Mr. Berkowitz earned his bachelor’s degree in political science from Union College in Schenectady, N.Y., and his Juris Doctor from Brooklyn Law School in Brooklyn, N.Y. He was recognized in PharmaVoice magazine as one of the 100 Most Inspiring Leaders in the Life Sciences in 2009, 2010 and 2012. We believe Mr. Berkowitz’s qualifications to serve on our board of directors include his substantial experience in pharmaceutical development and commercialization, and global market access.

Anthony B. Evnin, Ph.D., age 73, has served as a member of our board of directors since September 2006 and a member of the board of directors of Infinity Discovery, Inc. from June 2001 until the time of its merger with our predecessor company in September 2006. Since 1975, Dr. Evnin has served as a Partner of Venrock, a venture capital firm. Dr. Evnin serves as a director of AVEO Pharmaceuticals, Inc., a publicly traded biopharmaceutical company. Dr. Evnin also serves as a director of Constellation Pharmaceuticals, Inc., and Juno Therapeutics, Inc., both privately held biopharmaceutical companies. Dr. Evnin is also a Trustee of The Rockefeller University, a trustee of The Jackson Laboratory, a Trustee Emeritus of Princeton University, a member of the Board of Overseers and Managers of Memorial Sloan-Kettering Cancer Center, a director of the New York Genome Center, and a member of the Board of Directors of the Albert and Mary Lasker Foundation. He previously served as a director of the following publicly traded biopharmaceuticals companies during the last five years: Acceleron Pharma, Inc., CymaBay Therapeutics, Inc., Memory Pharmaceuticals Corp., Sunesis, Inc., Icagen, Inc., and Pharmos Corporation; and previously served as a director of the following privately held companies during the last five years: Acceleron Pharma, Inc., Altea Therapeutics Corporation, and Celladon Corporation, all biopharmaceutical companies, and Boston-Power, Inc. a lithium-ion battery company. Dr. Evnin received an A.B. in Chemistry from Princeton University and a Ph.D. in Chemistry from the Massachusetts Institute of Technology. We believe Dr. Evnin’s qualifications to serve on our board of directors include his substantial experience as an investor in, and director of, numerous biopharmaceutical companies as well as his expertise in corporate strategy.

Gwen A. Fyfe, M.D., age 62, has served as a member of our board of directors since March 2012. From 1997 to 2009, Dr. Fyfe held various positions with Genentech, Inc. (now a member of the Roche Group), a publicly traded biopharmaceutical company, including Vice President, Oncology Development; Vice President, Avastin ® Franchise Team; as well as the honorary title of Senior Staff Scientist. Dr. Fyfe played an important role in the development of Genentech’s approved oncology agents including Rituxan ® , Herceptin ® , Avastin ® and Tarceva ® . Dr. Fyfe sat on the development oversight committee for all of Genentech’s products and participated in the Research Review Committee that moved products from research into clinical development. Since leaving Genentech in 2009, Dr. Fyfe has been a consultant for venture capital firms and for a variety of biotechnology companies. Dr. Fyfe has served on the board of directors of Array BioPharma, Inc., a publicly traded biopharmaceutical company, since January 2012; Igenica, Inc., a privately held biopharmaceuticals company, since December 2013; and previously served on the board of Pharmacyclics, Inc., a publicly traded biopharmaceutical company, during the last five years. Dr. Fyfe is a recognized oncology expert in the broader oncology community and has been an invited member of Institute of Medicine panels, National Cancer Institute working groups and grant committees and American Society of Clinical Oncologists oversight committees. She received her M.D. from Washington University School of Medicine and is a board certified pediatric oncologist. We believe Dr. Fyfe’s qualifications to serve on our board of directors include her substantial industry experience in the late-stage development and regulatory approval processes for novel oncology therapeutics.

Eric S. Lander, Ph.D., age 57, has served as a member of our board of directors since September 2006. Dr. Lander was a co-founder and a member of the board of directors of Infinity Discovery, Inc. from 2001 until the time of its merger with our predecessor company in September 2006. Dr. Lander has been a Professor and Associate Professor of Biology at the Massachusetts Institute of Technology since 1990 and a Professor of Systems Biology at Harvard Medical School since 2004. Dr. Lander has served as the founding Director of The Eli and Edythe L. Broad Institute, a biomedical research institute formed by MIT and Harvard University, since 2003. Dr. Lander currently serves as a director of Innocence Project, a not-for-profit legal clinic, and as co-chair of the United States President’s Council of Advisers on Science and Technology. From 1993 to 2003, Dr. Lander was the Director of the Whitehead/MIT Center for Genome Research. Dr. Lander received an A.B. in

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Mathematics from Princeton University and a D.Phil. in Mathematics from Oxford University, which he attended as a Rhodes Scholar. We believe Dr. Lander’s qualifications to serve on our board of directors include his scientific acumen and expertise in the fields of genomics and human genetic diseases.

Adelene Q. Perkins , age 54, has served as a member of our board of directors and our President and Chief Executive Officer since January 2010, including as chair of our board of directors since November 2012, as our President and Chief Business Officer from October 2008 through December 2009 and as our Executive Vice President and Chief Business Officer between September 2006 and October 2008. Ms. Perkins served as Executive Vice President of Infinity Discovery, Inc. from February 2006 until the merger with our predecessor company in September 2006 and Chief Business Officer of Infinity Discovery from June 2002 until September 2006. Ms. Perkins served as Vice President of Business and Corporate Development of TransForm Pharmaceuticals, Inc., a private pharmaceutical company, from 2000 to 2002. From 1992 to 1999, Ms. Perkins held various positions at Genetics Institute, most recently serving as Vice President of Emerging Business and General Manager of the DiscoverEase ® business unit. From 1985 to 1992, Ms. Perkins held a variety of positions at Bain & Company, a strategy consulting firm. Ms. Perkins currently serves as a director of Project Hope, a not-for-profit social service company. Ms. Perkins received a B.S. in Chemical Engineering from Villanova University and an M.B.A. from Harvard Business School. We believe Ms. Perkins’ qualifications to serve on our board of directors include her extensive experience as a senior business executive in the biopharmaceutical industry, including as our President and Chief Executive Officer, and her expertise in corporate strategy and business operations.

Norman C. Selby , age 62, has served as a member of our board of directors since March 2012. Mr. Selby has served as executive chairman of Real Endpoints, LLC, a healthcare information company, since October 2010 and Chief Executive Officer of its subsidiary Reimbursement Intelligence. Prior to his role at Real Endpoints, Mr. Selby served as a Senior Advisor of Perseus, L.L.C., a private equity firm, since August 2005, and as President and CEO of TransForm Pharmaceuticals, Inc., a privately held specialty pharmaceutical company that was acquired by Johnson & Johnson in April 2005. Prior to TransForm Pharmaceuticals, Mr. Selby was an Executive Vice President at Citigroup/Citicorp from 1997 to 2000. Mr. Selby spent the bulk of his career, from 1978 to 1997, at McKinsey & Company where he was Director (Senior Partner) in the firm’s New York office. He held several leadership roles at McKinsey, including head of the firm’s Global Pharmaceuticals and Medical Products Practice. From 1987 to 1989, Mr. Selby took a leave of absence from McKinsey to serve as Chief Operating Officer of the New York Blood Center, the largest community blood organization in the country, where he led its financial and operational turnaround. Mr. Selby is currently a member of the board of directors of the following privately held companies: Real Endpoints, LLC, a healthcare information company; Merz GmbH, a specialty pharmaceutical company; and Metamark Genetics, a life science diagnostics company. Mr. Selby previously served as a director of: Physicians Interactive Holdings, Inc., a provider of online and mobile clinical resources and solutions, between October 2008 and July 2013; Ascenta Therapeutics, Inc., a privately held biopharmaceutical company, between March 2009 and January 2013; Nanobio, Inc., a privately held biopharmaceutical company, between August 2006 and October 2011; Millennium Pharmaceuticals, Inc., a publicly traded biopharmaceutical company from May 2000 until it was acquired by Takeda Pharmaceutical Company Limited in May 2008; and Windhover Information, a publishing and information company in the pharmaceutical, biotechnology, and medical device industries, from May 2004 until it was sold to Reed Elsevier in March 2008. Mr. Selby serves on the Board of Trustees of the Central Park Conservancy and the Memorial Sloan-Kettering Cancer Center, both based in New York City. He is also a member of the advisory board of the Harvard Business School’s Healthcare Initiative and a Board member of the National Parks Conservation Association in Washington D.C. Mr. Selby holds a B.A. in Architecture from Yale College and an M.B.A. with Distinction from the Harvard Graduate School of Business Administration. We believe Mr. Selby’s qualifications to serve on our board of directors include his extensive experience as a senior business executive in the biopharmaceutical industry, and his expertise in corporate strategy, finance, and commercialization of biopharmaceutical products.

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Ian F. Smith , age 48, has served as a member of our board of directors since May 2008. Mr. Smith is Executive Vice President and Chief Financial Officer of Vertex Pharmaceuticals, Inc., a publicly traded biopharmaceutical company, a position he has held since February 2006. From November 2003 to February 2006, he was Vertex’s Senior Vice President and Chief Financial Officer, and from October 2001 to November 2003, he served as Vertex’s Vice President and Chief Financial Officer. Prior to joining Vertex, Mr. Smith served as a partner in the Life Science and Technology Practice Group of Ernst & Young LLP, an accounting firm, from 1999 to 2001. Mr. Smith initially joined Ernst & Young’s U.K. firm in 1987, and then joined its Boston office in 1995. Mr. Smith currently is a member of the board of directors of Acorda Therapeutics, Inc., a publicly traded biopharmaceutical company. He also served as a director of Epix Pharmaceuticals, Inc., a publicly traded biopharmaceutical company, and Tolerx Inc., a privately held biopharmaceutical company, during the past five years. Mr. Smith holds a B.A. in accounting and finance from Manchester Metropolitan University, U.K., is a member of the American Institute of Certified Public Accountants and is a Chartered Accountant of England and Wales. We believe Mr. Smith’s qualifications to serve on our board of directors include his experience as the chief financial officer of a publicly traded biopharmaceutical company as well as his expertise in accounting and corporate finance.

Michael C. Venuti, Ph.D., age 60, has served as a member of our board of directors and the board of directors of our predecessor company since May 2003. Dr. Venuti served as the Chief Scientific Officer of NeuroTherapeutics Pharma, Inc., a privately held biopharmaceutical company from July 2011 to March 2013. Prior to NeuroTherapeutics, Dr. Venuti served as President, Chief Executive Officer and a director of iPierian, Inc., a privately held biopharmaceutical company, between June 2010 and April 2011 after joining iPierian as President and Chief Scientific Officer in February 2010. Dr. Venuti was Chief Executive Officer and Director of BioSeek, Inc., a privately held drug discovery company, from November 2007 to February 2010. Prior to that, Dr. Venuti was an Operating Manager at TPG Growth Biotech Ventures, a private equity firm, from January through June 2007. Dr. Venuti served as the Acting Chief Executive Officer of our predecessor company prior to its merger with Infinity Discovery Inc. in September 2006, and as its Chief Scientific Officer from April 2005 through September 2006. Prior to that, he was Senior Vice President of Pharmacogenomics, and was named Senior Vice President of Research and General Manager of Celera South San Francisco when the Celera Genomics Group of Applera Corporation, a life sciences company, acquired Axys Pharmaceuticals, Inc. in 2001. From 1994 through 2001, Dr. Venuti was Director of Medicinal Chemistry, and then Chief Technical Officer, for Axys Pharmaceuticals and its predecessor company, Arris Pharmaceutical Corporation. Dr. Venuti served as a director of BioSeek, Inc. and iPierian, Inc., privately held biopharmaceutical companies, during the last five years. Dr. Venuti received an A.B. in Chemistry from Dartmouth College and a Ph.D. in Organic Chemistry from the Massachusetts Institute of Technology. We believe Dr. Venuti’s qualifications to serve on our board of directors include his experience and scientific expertise in running research and development operations to drive strategic and business development goals at biotechnology and larger life sciences companies.

Our board of directors recommends that you vote FOR the election of each of

the director nominees named above.

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CORPORATE GOVERNANCE

General

We believe that good corporate governance is important to ensure that our company is managed for the long-term benefit of our stockholders. We periodically review our corporate governance policies and practices and compare them to those suggested by various authorities in corporate governance and the practices of other public companies. As a result, we have adopted policies and procedures that we believe are in the best interests of Infinity and our stockholders.

Corporate Governance Guidelines; Code of Conduct and Ethics

Our Corporate Governance Guidelines assist our board of directors in the exercise of its duties and responsibilities and to serve the best interests of Infinity and our stockholders. These guidelines, which provide a framework for the conduct of our board’s business, provide that:

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the principal responsibility of the directors is to oversee our management;

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a majority of the members of the board shall be independent directors, unless otherwise permitted by NASDAQ rules;

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the independent directors meet at least twice a year and at other times at the request of any independent director;

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directors have full and free access to management and, as necessary and appropriate, independent advisors;

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new directors participate in an orientation program; and

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at least annually, the Nominating and Corporate Governance Committee oversees a self-evaluation by the board and its committees to assess the effectiveness of the board and its committees.

In addition, our corporate governance guidelines set forth our policy that directors should attend annual stockholder meetings. All of our then-serving directors attended our 2013 annual meeting of stockholders.

We have also adopted a written Code of Conduct and Ethics that applies to our directors, officers and employees, including our principal executive officer, principal financial officer, principal accounting officer, or persons performing similar functions. In addition to our having posted a copy of the code on our website, we intend to post on our website all disclosures that are required by law or the NASDAQ Stock Market listing standards concerning any amendments to, or waivers of, our code.

Determination of Independence

Rule 5605 of the NASDAQ Marketplace Rules requires a majority of a listed company’s board of directors to be comprised of independent directors within one year of listing. In addition, the NASDAQ Marketplace Rules require that, subject to specified exceptions, each member of a listed company’s audit, compensation and corporate governance and nominating committees be independent and that audit committee members also satisfy independence criteria set forth in Rule 10A-3 under the Securities Exchange Act of 1934, as amended, or the Exchange Act. Under Rule 5605(a)(2), a director will only qualify as an “independent director” if, in the opinion of our board of directors, that person does not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. In order to be considered independent for purposes of Rule 10A-3, a member of an audit committee of a listed company may not, other than in his or her capacity as a member of the audit committee, the board of directors, or any other board committee: (1) accept, directly or indirectly, any consulting, advisory or other compensatory fee from the listed company or any of its subsidiaries; or (2) be an affiliated person of the listed company or any of its subsidiaries. In addition, in affirmatively determining the independence of any director who will serve on a company’s compensation committee, Rule 10C-1 under the Exchange Act requires that a company’s board of directors consider all factors

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specifically relevant to determining whether a director has a relationship to such company which is material to that director’s ability to be independent from management in connection with the duties of a compensation committee member, including, but not limited to: (i) the source of compensation of the director, including any consulting, advisory or other compensatory fee paid by such company to the director; and (ii) whether the director is affiliated with the company or any of its subsidiaries or affiliates.

Based on information requested from and provided by each director concerning his or her background, employment and affiliations, including family relationships, our board of directors has determined that none of Messrs. Berkowitz, Selby or Smith, or Drs. Baselga, Evnin, Fyfe, Lander, or Venuti has a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director and that each of these directors is or would be an “independent director” as defined under Rule 5605(a)(2) of the NASDAQ Marketplace Rules. Our board of directors has also determined (i) that Messers. Smith and Selby and Dr. Evnin, who comprise our audit committee, each satisfy the independence standards for the audit committee established by the SEC and the NASDAQ Marketplace Rules (ii) Dr. Venuti and Messers. Selby and Berkowitz, who comprise our compensation committee, each satisfy the independence standards for the compensation committee established by the SEC and the NASDAQ Marketplace Rules and (iii) Drs. Evnin, Lander and Fyfe who comprise our nominating and corporate governance committee, each satisfy the independence standards for the nominating and corporate governance committee established by the SEC and the NASDAQ Marketplace Rules. In making such determination, our board of directors considered the relationships that each such non-employee director has with Infinity, including each of the transactions described below in “Transactions with Related Person Transactions,” and all other facts and circumstances our board of directors deemed relevant in determining independence.

Director Candidates: Criteria and Diversity

In considering whether to recommend to our board of directors any particular candidate for inclusion in the board’s slate of recommended director nominees, including candidates recommended by stockholders, the Nominating and Corporate Governance Committee of our board applies the criteria set forth in our Corporate Governance Guidelines. These criteria include the candidate’s integrity, business acumen, knowledge of our business and industry, experience, diligence, conflicts of interest and the ability to act in the interests of all stockholders. The Nominating and Corporate Governance Committee does not assign specific weights to particular criteria, and no particular criterion is a prerequisite for each nominee. We believe that the backgrounds and qualifications of the directors, considered as a group, should provide a significant composite mix of experience, knowledge and abilities that will allow the board to fulfill its responsibilities. While we do not have a formal policy with respect to diversity, the value of diversity on the board of directors is considered by the Nominating and Corporate Governance Committee, and director nominees are not discriminated against on the basis of race, gender, religion, national origin, sexual orientation, disability or any other basis proscribed by law.

The process followed by the Nominating and Corporate Governance Committee to identify and evaluate candidates includes requests to independent directors and others for recommendations, meetings from time to time to evaluate biographical information and background material relating to potential candidates, and interviews of selected candidates by members of the board.

Stockholders may recommend individuals to the Nominating and Corporate Governance Committee for consideration as potential director candidates by submitting their names, together with appropriate biographical information and background materials and a statement as to whether the stockholder or group of stockholders making the recommendation has beneficially owned more than 5 percent of our common stock for at least a year as of the date such recommendation is made, to the Nominating and Corporate Governance Committee, c/o Lawrence E. Bloch, M.D., J.D., Company Secretary, Infinity Pharmaceuticals, Inc., 780 Memorial Drive, Cambridge, Massachusetts 02139. Assuming that appropriate biographical and background material is provided for candidates recommended by stockholders, the Nominating and Corporate Governance Committee will evaluate those candidates by following substantially the same process, and applying substantially the same criteria, as for candidates submitted by others.

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Our stockholders also have the right to nominate director candidates themselves, without any prior review or recommendation by the Nominating and Corporate Governance Committee, by following the procedures set forth in response to the question “ How and when may I submit a stockholder proposal, including a stockholder nomination for director, for the 2015 annual meeting? ” above.

Communications from Stockholders

Our board of directors will give appropriate attention to written communications that are submitted by stockholders and other interested parties, and will respond if and as appropriate. Mr. Selby, as our current Lead Outside Director, is primarily responsible for monitoring communications from stockholders and for providing copies or summaries to the other directors as he considers appropriate.

Communications are forwarded to all directors if they relate to important substantive matters and include suggestions or comments that the Lead Outside Director considers to be important for the directors to know. In general, communications relating to corporate governance and corporate strategy are more likely to be forwarded than communications relating to ordinary business affairs, personal grievances, and matters as to which we tend to receive repetitive or duplicative communications.

Stockholders who wish to send communications on any topic to the board of directors should address such communications to Board of Directors, c/o Lawrence E. Bloch, M.D., J.D., Company Secretary, Infinity Pharmaceuticals, Inc., 780 Memorial Drive, Cambridge, MA 02139, or by email to contactboard@infi.com.

Board and Committee Meetings

Our board of directors has responsibility for reviewing our overall performance rather than for overseeing day-to-day operations. The board’s primary responsibility is to oversee the management of our company and, in so doing, serve the best interests of our company and its stockholders. The board selects, evaluates and provides for the succession of executive officers and, subject to oversight by the Nominating and Corporate Governance Committee, the board nominates for election at annual stockholder meetings individuals to serve on our board of directors and elects individuals to fill any vacancies on the board. The board reviews corporate objectives and strategies, and evaluates and approves significant policies and proposed major commitments of corporate resources and material proposed transactions. It participates in decisions that have a potential major economic impact on our company. Management keeps the directors informed of our activities through regular written reports and presentations at board and committee meetings.

Our board of directors met eight times during our 2013 fiscal year, including by telephone conference. During that year, each of our directors attended 75 percent or more of the total number of meetings of the board of directors and the committees on which he or she served.

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Our board has standing Audit, Compensation, Nominating and Corporate Governance, and Research and Development Committees. Each committee has a charter that has been approved by the board. Each committee must review the appropriateness of its charter and perform a self-evaluation at least annually. All members of the Audit, Compensation, and Nominating and Corporate Governance Committees are independent, non-employee directors. Current committee memberships are shown in the table below:

Audit
Committee
Compensation
Committee
Nominating and Corporate
Governance Committee
Research and
Development
Committee

Jose Baselga, M.D., Ph.D.

LOGO

Jeffery Berkowitz

LOGO

Anthony B. Evnin, Ph.D.

LOGO LOGO

Gwen A. Fyfe, M.D.

LOGO LOGO

Eric S. Lander, Ph.D.

LOGO LOGO

Adelene Q. Perkins LOGO

Norman C. Selby †

LOGO LOGO

Ian F. Smith

LOGO

Michael C. Venuti, Ph.D.

LOGO LOGO

† Lead Outside Director LOGO Chair of the Board LOGO Committee Chair LOGO Committee Member

Board Leadership Structure

Our Corporate Governance Guidelines provide the board with flexibility to determine the appropriate leadership structure for the board and the Company, including but not limited to whether it is appropriate to separate the roles of Chair of the board and Chief Executive Officer. In making these determinations, the board considers numerous factors, including the specific needs and strategic direction of the Company and the size and membership of the board at the time. The board believes that combining the roles of Chief Executive Officer and Chair of our board of directors is in the best interests of the Company and stockholders. As our Chief Executive Officer and Chair of the board, Ms. Perkins is responsible for setting the strategic direction for our company and for day-to-day leadership and performance of our company, as well as setting the agenda for board meetings, and presiding over meetings of the full board. Because Ms. Perkins is an employee and is therefore not “independent,” our board of directors has appointed Mr. Selby as Lead Outside Director to preside at all executive sessions of the board. The Nominating and Corporate Governance Committee evaluates our board leadership structure from time to time and may recommend alterations of this structure in the future.

Audit Committee

The Audit Committee provides the opportunity for direct contact between our independent registered public accounting firm and the board, and has the following principal duties:

•

appointing, approving the services provided by and the compensation of, and assessing the independence of our independent registered public accounting firm;

•

overseeing the work of our independent registered public accounting firm, including through the receipt and consideration of certain reports from the firm;

•

reviewing and discussing with management and the independent registered public accounting firm our annual and quarterly financial statements and related disclosures;

•

monitoring our internal control over financial reporting, disclosure controls and procedures, and code of business conduct and ethics;

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•

overseeing our internal control function;

•

discussing our risk management policies;

•

establishing policies regarding hiring employees from the independent registered public accounting firm and procedures for the receipt and retention of accounting related complaints and concerns;

•

meeting independently with our internal control staff, independent registered public accounting firm and management; and

•

preparing the Audit Committee report required by SEC rules (which is included beginning on page 20 of this proxy statement).

The Audit Committee is authorized to retain advisors and consultants and to compensate them for their services. The Audit Committee charter is available on our website, www.infi.com.

The current members of the Audit Committee are Messrs. Smith (Chair) and Selby and Dr. Evnin. Our board of directors has determined that Mr. Smith is an “Audit Committee financial expert” as defined in Item 407(d)(5)(ii) of Regulation S-K, and that each of these members is independent as such term is defined under the applicable rules of the NASDAQ Stock Market and as is contemplated by Rule 10A-3 under the Exchange Act. The Audit Committee held four meetings during our 2013 fiscal year. See “Report of the Audit Committee” below.

Compensation Committee

Our Compensation Committee, among other things, provides recommendations to the board regarding our compensation programs, and has the following principal duties:

•

reviewing and approving, or making recommendations to the board with respect to, the compensation of our Chief Executive Officer and our other executive officers;

•

overseeing an evaluation of our executive officers;

•

overseeing and administering our incentive compensation and equity-based plans that are subject to approval by the board;

•

reviewing and making recommendations to the board with respect to director compensation;

•

reviewing, discussing with management and recommending to the board the Compensation Discussion and Analysis required by SEC rules (which is included beginning on page 27 of this proxy statement); and

•

preparing the Compensation Committee report required by SEC rules (which is included on page 45 of this proxy statement).

The Compensation Committee is authorized to retain advisors and consultants, including advisors and consultants to assist in the evaluation of executive compensation, and to compensate them for their services. Prior to June 2013 our management team used an outside compensation consultant, Towers Watson, to provide the Compensation Committee with peer group and market information to enable the Compensation Committee to confirm that our executive compensation is competitive and commensurate with the executive officers’ responsibilities and to provide advice on market trends in executive compensation practices. Beginning in June 2013, the Compensation Committee directly engaged Radford, an Aon company, as compensation consultant to perform activities previously performed by Towers Watson. Radford also provides other services to us, which raises a potential conflict of interest with respect to both the Compensation Committee’s and our use of Radford. In addressing the potential conflict, management considered all of the “independence” factors listed Rule 10c-1(b)(4) of the Exchange Act of 1934 and determined that Radford does not have a conflict of interest that will influence the advice provided by Radford to the company regarding executive compensation. These factors include the following: the fact that the fees paid by the Company to Radford in the most recent year

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reviewed totaled less than $120,000; the existence and effectiveness of Radford’s consulting protocols and procedures; the lack of business or personal relationships between Radford and the Compensation Committee members and our executive officers; and the fact that Radford does not own any of our stock.

Our board has delegated authority to Ms. Perkins to grant stock options to employees of the Company under the 2010 Stock Incentive Plan subject to the following conditions: (i) such options shall be on the terms set forth in the Company’s standard form of stock option agreement (or such other form as the Compensation Committee may designate from time to time for this purpose); (ii) any such options shall, to the maximum extent permitted by applicable federal tax laws be granted as incentive stock options; (iii) the exercise price of such options shall be equal to the closing price of the Company’s common stock on the date of grant; and (iv) she is not authorized (a) to grant options to herself, or to any other executive officer of the Company or to any person that the board or the Compensation Committee may from time to time designate in writing; (b) to grant in the aggregate options with respect to more than 250,000 shares of Common Stock in any calendar quarter; or (c) to grant to any person, in any one calendar year, options with respect to more than 50,000 shares of Common Stock. Ms. Perkins shall maintain a list of the options granted pursuant to this delegated authority and shall report to the Compensation Committee regarding the options granted, at such times and in such form as the Compensation Committee may from time to time request.

The Compensation Committee charter is available on our website, www.infi.com. See “Compensation of Executive Officers—Compensation Discussion and Analysis” below for additional information concerning the Compensation Committee’s role, processes and procedures in overseeing executive compensation.

The members of our compensation committee during fiscal year 2013 were Drs. Evnin and Lynch and Messers. Selby and Babler. The current members of the Compensation Committee are Messrs. Selby (Chair) and Berkowitz and Dr. Venuti. Our board has determined that each of these members is independent as defined under the applicable NASDAQ rules and as contemplated by applicable Exchange Act rules. The Compensation Committee held nine meetings during our 2013 fiscal year. See “Compensation of Executive Officers—Compensation Committee Report” below.

Nominating and Corporate Governance Committee

The Nominating and Corporate Governance Committee, among other things, provides recommendations to the board regarding the nomination of directors, and has the following principal duties:

•

recommending to the board the persons to be nominated for election as directors at any meeting of stockholders and the persons, if any, to be elected by the board to fill any vacancies on the board;

•

developing and recommending corporate governance principles to the board; and

•

overseeing the annual evaluation of the board and its committees.

The Nominating and Corporate Governance Committee is authorized to retain advisors and consultants and to compensate them for their services. The Nominating and Corporate Governance Committee has a charter, which is available on our website, www.infi.com.

The current members of the Nominating and Corporate Governance Committee are Drs. Evnin (Chair), Lander and Fyfe. Our board of directors has determined that each of these members is independent as defined under the applicable NASDAQ rules. The Nominating and Corporate Governance Committee held three meetings during our 2013 fiscal year.

Board’s Role in Risk Oversight

Our board of directors’ role in our risk oversight process includes receiving regular reports from members of management on areas of material risk, including operational, financial, legal and regulatory, and strategic and

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reputational risks. The full board (or the appropriate committee in the case of risks that are under the purview of a particular committee) receives these reports from the appropriate “risk owner” within our company to enable it to understand our risk identification, management and mitigation strategies. When a committee receives such a report, the chair of the relevant committee summarizes such report for the full board during the next board meeting. This process enables to the board and its committees to coordinate the risk oversight role, particularly with respect to risk interrelationships. As part of its charter, the Audit Committee is responsible for discussing our policies with respect to risk assessment and risk management.

Risk Considerations in our Compensation Program

We and our Compensation Committee of our board of directors have reviewed the compensation policies and practices for all of our employees (whom we call citizen-owners) and have concluded that any risks arising from our compensation policies and programs are not reasonably likely to have a material adverse effect on our company or business. In reaching this conclusion, we and the Compensation Committee considered various factors, including the following:

•

the establishment of base salaries consistent with our executive officers’ responsibilities and market comparables to ensure that our executive officers would not be motivated to take excessive risks to achieve a reasonable level of financial security;

•

the mix between fixed and variable, annual and long-term, and cash and equity compensation, which is intended to encourage strategies and actions that are in our company’s long-term best interests;

•

vesting periods for equity compensation awards that reward sustained stock price appreciation;

•

the evaluation of company performance (which drives the amount of cash and number of shares available for grant under our contingent cash compensation and annual merit stock option programs, respectively) based on a variety of long- and short-term objectives in which no single objective is given substantial weight, thus diversifying the risk associated with any single indicator of performance; and

•

the discretion available to our Compensation Committee not to apply fixed formulae in assessing our company performance, thus enabling the Compensation Committee to, among other things, (a) eliminate the potential incentive for management to conduct activities that are in the company’s annual goals, but which may not, due to new data or other inputs, ultimately prove to be in the best interest of stockholders, and (b) reward management for making decisions that are in the long-term best interest of our product development programs, even when those decisions result in the failure to meet short-term objectives.

Availability of Corporate Governance Materials

You can access the current charters for the Audit, Compensation, Nominating and Corporate Governance, and Research and Development Committees of our board of directors, our Corporate Governance Guidelines, and our Code of Conduct and Ethics at www.infi.com or by contacting Jaren Irene Madden in our investor relations department. She may be reached at 780 Memorial Drive, Cambridge, Massachusetts 02139; telephone: 617-453-1336; e-mail: irpr_info@infi.com.

Audit Committee Report

The Audit Committee has reviewed our audited financial statements for the fiscal year ended December 31, 2013 and has discussed these financial statements with our management and Ernst & Young LLP, our independent registered public accounting firm.

The Audit Committee has also received from, and discussed with, Ernst & Young LLP various communications that our independent registered public accounting firm is required to provide to the Audit Committee, including the matters required to be discussed by U.S. Auditing Standards No. 16.

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The Audit Committee has received the written disclosures and the letter from Ernst & Young LLP required by applicable requirements of the Public Company Accounting Oversight Board regarding an independent accountant’s communications with the audit committee concerning independence, and has discussed with Ernst & Young LLP its independence from Infinity.

Based on its discussions with management and the independent registered public accounting firm, and its review of the representations and information provided by management and the independent registered public accounting firm, the Audit Committee recommended to our board of directors that the audited financial statements be included in our Annual Report on Form 10-K for the year ended December 31, 2013.

By the Audit Committee of the Board of Directors,

Ian F. Smith (Chair)

Anthony B. Evnin, Ph.D.

Norman C. Selby

Audit Fees

The following table summarizes the fees of Ernst & Young LLP billed to us for each of the last two fiscal years:

Fiscal Year ended December 31,

Fee Category

2013 2012

Audit Fees(1)

$ 653,370 $ 679,500

Audit-Related Fees(2)

1,995 1,995

Tax Fees(3)

74,070 57,434

Total Fees

$ 729,435 $ 738,929

(1) Audit fees consist of fees for the audit of our financial statements, the review of the interim financial statements included in our quarterly reports on Form 10-Q, preparation of comfort letters and registration statements, accounting and consultation on matters addressed during the audit or interim reviews, including consultation regarding licensing activities, and other professional services provided.
(2) Audit-related fees consist of fees for assurance and related services that are reasonably related to the performance of the audit and the review of our financial statements and which are not reported under “Audit Fees.” These services primarily relate to a subscription to an online database managed by Ernst & Young LLP.
(3) Tax fees consist of fees for tax compliance, tax advice and tax planning services. These services primarily relate to preparation of state and federal tax returns. For our 2013 fiscal year, tax fees include analysis by Ernst & Young LLP related to state and federal tax incentive awards and section 382 of the Internal Revenue Code of 1986.

Pre-Approval Policies and Procedures

The Audit Committee has adopted policies and procedures relating to the approval of all audit and non-audit services that are to be performed by our independent registered public accounting firm. This policy generally provides that we will not engage our independent registered public accounting firm to render audit or non-audit services unless the service is specifically approved in advance by the Audit Committee or the engagement is entered into pursuant to the pre-approval procedures described below.

From time to time, the Audit Committee may pre-approve specified types of services that are expected to be provided to us by our independent registered public accounting firm during the next 12 months. Any such pre-approval is detailed as to the particular service or type of services to be provided and is also generally subject to a maximum dollar amount.

The Audit Committee has delegated authority to the Chair of the Audit Committee to pre-approve any audit or non-audit service to be provided to us by our independent registered public accounting firm. Any approval of services by the Chair of the Audit Committee pursuant to this delegated authority must be reported on at the next meeting of the Audit Committee.

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During our 2013 fiscal year, no services were provided to us by Ernst & Young LLP or any other accounting firm other than in accordance with the pre-approval policies and procedures described above.

Director Compensation

The following table details the total compensation earned by our non-employee directors during our 2013 fiscal year:

Name

Fees
Earned
or Paid
in Cash
($)
Stock
Awards
($)
Option
Awards
($)(1)
Non-Equity
Incentive Plan
Compensation
($)
Change in
Pension Value
and
Nonqualified
Deferred
Compensation
Earnings
($)
All Other
Compensation
($)
Total
($)

Martin Babler

$ 47,500 — $ 148,203 (2) — — — $ 195,703

Anthony B. Evnin, Ph.D.

$ 62,000 — $ 167,963 (3) — — — $ 229,963

Gwen A. Fyfe, M.D.

$ 54,000 — $ 148,203 (4) — — — $ 202,203

Eric S. Lander, Ph.D.

$ 55,000 — $ 148,203 (5) — — — $ 203,203

Patrick P. Lee

$ 2,000 — $ — (6) — — — $ 2,000

Thomas J. Lynch, M.D.

$ 53,500 — $ 148,203 (7) — — — $ 201,703

Norman C. Selby

$ 90,500 — $ 266,765 (8) — — — $ 357,265

Ian F. Smith

$ 52,000 — $ 187,724 (9) — — — $ 239,724

Michael C. Venuti, Ph.D.

$ 48,000 — $ 187,724 (10) — — — $ 235,724

(1) The amounts in this column reflect the aggregate grant date fair value of awards made to such individual.
(2) Mr. Babler was granted an option award on June 11, 2013 that had grant date fair value of $148,203. As of December 31, 2013, Mr. Babler held options to purchase 55,375 shares of our common stock. Mr Babler retired from our board on March 6, 2014.
(3) Dr. Evnin was granted two option awards on June 11, 2013 that had grant date fair values of $148,203 and $19,760. As of December 31, 2013, Dr. Evnin did not hold any stock awards, but held options to purchase an aggregate of 61,125 shares of our common stock. For purposes of this footnote, 112,451 shares of our common stock held by entities affiliated with Venrock, which are identified as being beneficially owned by Dr. Evnin in the table entitled “Stock Ownership of Certain Beneficial Owners and Management” above, have not been reported.
(4) Dr. Fyfe was granted an option award on June 11, 2013 that had a grant date fair value of $148,203. As of December 31, 2013, Dr. Fyfe held options to purchase an aggregate of 31,000 shares of our common stock.
(5) Dr. Lander was granted an option award on June 11, 2013 that had a grant date fair value of $148,203. As of December 31, 2013, Dr. Lander did not hold any stock awards, but held options to purchase an aggregate of 68,585 shares of our common stock.
(6) As of December 31, 2013, Mr. Lee did not hold any stock or option awards. Mr. Lee retired from our board on June 11, 2013.
(7) Dr. Lynch was granted an option award on June 11, 2013 that had a grant date fair value of $148,203. As of December 31, 2013, Dr. Lynch held options to purchase 42,000 shares of our common stock. Mr. Lynch retired from our board on March 6, 2014.
(8) Mr. Selby was granted three option awards on June 11, 2013 that had grant date fair values of $148,203, $98,802 and $19,760. As of December 31, 2012, Mr. Selby did not hold any stock awards, but held options to purchase 35,500 shares of our common stock.
(9) Mr. Smith was granted two option awards on June 11, 2013 that had grant date fair values of $148,203 and $39,521. As of December 31, 2013, Mr. Smith did not hold any stock awards, but held options to purchase 70,875 shares of our common stock.
(10) Dr. Venuti was granted two option awards on June 11, 2013 that had grant date fair values of $148,203 and $39,521. As of December 31, 2013, Dr. Venuti did not hold any stock awards, but held and options to purchase an aggregate of 92,125 shares of our common stock.

Changes to director compensation were made during our 2013 fiscal year. In March 2013, our board of directors approved the following director cash compensation program, effective as of immediately following our 2013 annual meeting:

•

a $40,000 annual retainer for service as a non-executive chair of our board of directors;

•

a $35,000 annual retainer for service as a director;

•

a $30,000 annual retainer for service as lead outside director;

•

a $15,000 annual retainer for service as chair of the Audit Committee;

•

a $10,000 annual retainer for service as chair of the Research and Development Committee;

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•

a $10,000 annual retainer for service as chair of the Compensation Committee;

•

a $10,000 annual retainer for service as chair of the Nominating and Corporate Governance Committee;

•

a $10,000 annual retainer for service as a non-chairing member of the Audit Committee;

•

a $7,500 annual retainer for service as a non-chairing member of a committee of the board other than the Audit Committee.

The following is a summary of the standard compensation of our non-employee directors prior to our 2013 annual meeting:

•

a $60,000 annual retainer for service as a non-executive chair of our board of directors;

•

a $15,000 annual retainer for service as a director;

•

a $25,000 annual retainer for service as lead outside director;

•

a $10,000 annual retainer for service as chair of the Audit Committee;

•

a $10,000 annual retainer for service as chair of the Research and Development Committee;

•

a $5,000 annual retainer for service as chair of the Compensation Committee;

•

a $5,000 annual retainer for service as chair of the Nominating and Corporate Governance Committee;

•

$1,500 for each board meeting attended in person;

•

$500 for each board meeting attended by telephone; and

•

$500 for each meeting of the Audit Committee, Compensation Committee, Nominating and Corporate Governance Committee, or Research and Development Committee attended in person or by telephone, except that members of our Research and Development Committee who attend our annual program review meetings in his or her capacity as a director are compensated at a rate of $1,500 per day.

No director who is an employee receives compensation for his or her service as a director. Each non-employee director is also reimbursed for reasonable out-of-pocket expenses incurred in attending meetings of the board of directors or any committee of the board of directors.

In addition to the cash compensation discussed above, each non-employee director automatically receives nonstatutory stock options under our 2010 Stock Incentive Plan. The amounts of such nonstatutory stock option grants, which were increased in March 2013, are as follows:

•

each non-employee director receives, upon commencement of service on the board, a nonstatutory option to purchase 30,000 shares of our common stock and, on the date of each annual meeting of stockholders thereafter, a nonstatutory option to purchase 15,000 shares of our common stock; and

•

each non-employee director who serves in the following positions receives additional nonstatutory options to purchase shares of our common stock in the amounts indicated below upon the date of commencement of service in such position and upon the date of each annual stockholder meeting thereafter:

Position

Stock Option Grant

Non-Executive Chair of the Board of Directors

12,000 shares

Lead Outside Director

10,000 shares

Chair of Research and Development Committee

4,000 shares

Chair of Audit Committee

4,000 shares

Chair of Compensation Committee

2,000 shares

Chair of Nominating and Corporate Governance Committee, if not Lead Outside Director

2,000 shares

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Each of these options has an exercise price per share equal to the fair market value per share of our common stock on the grant date and has a ten year term, subject to earlier termination following cessation of board service by the holder of the option unless otherwise modified by our board of directors. In addition, each grant vests over a period of one or two years in equal quarterly installments (with respect to one-eighth (1/8 th ) of the shares subject to the option grant made in connection with commencement of service as a member of the board and with respect to one-fourth (1/4 th ) of the shares subject to the option grant made at each annual meeting of stockholders) beginning at the end of the first calendar quarter after the date of grant, provided that the option holder continues to serve as a director or in the position for which the grant was made. These options immediately vest in full upon certain changes in control or ownership or upon death or disability of the option holder while serving as a director.

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TRANSACTIONS WITH RELATED PERSONS

In November 2008, we entered into strategic alliance agreements with each of Mundipharma International Corporation Limited, or Mundipharma, and Purdue Pharmaceutical Products L.P., or Purdue, independent associated companies of Beacon Company, or Beacon, and Rosebay Medical Company L.P., or Rosebay. In connection with the entry into the strategic alliance agreements, we also entered into a securities purchase agreement and line of credit agreement with Purdue and its independent associated company, Purdue Pharma L.P., or PPLP. The line of credit agreement was subsequently assigned exclusively to PPLP.

Under the terms of the securities purchase agreement we issued and sold an aggregate of 6,000,000 shares of our common stock and warrants to purchase up to an aggregate of 6,000,000 additional shares of our common stock to Purdue and PPLP for an aggregate purchase price of $75 million. An equal number of shares of common stock and warrants were issued to Purdue and PPLP. Immediately after such issuance, these securities represented approximately 37.3 percent of our then outstanding common stock, assuming exercise of such warrants. All of the securities initially issued to Purdue and PPLP were subsequently transferred through their respective associated entities Beacon and Rosebay. All warrants held by Beacon and Rosebay to purchase shares of our common stock have expired without having been exercised.

On July 17, 2012, we terminated our strategic alliance with Mundipharma and Purdue and entered into termination and revised relationship agreements with each of those entities, which we refer to as the 2012 termination agreements.

Under the terms of the 2012 termination agreements:

•

All intellectual property rights that we had previously licensed to Mundipharma and Purdue to develop and commercialize products under the previous strategic alliance agreements terminated, with the result that we have worldwide rights to all product candidates that had previously been covered by the strategic alliance.

•

We have no further obligation to provide research and development services to Mundipharma and Purdue as of July 17, 2012.

•

Mundipharma and Purdue have no further obligation to provide research and development funding to us. Under the alliance, Mundipharma was obligated to reimburse us for research and development expenses we incurred, up to an annual aggregate cap for each alliance program other than products targeting fatty acid amide hydrolase, or FAAH.

•

We are obligated to pay Mundipharma and Purdue a four percent royalty in the aggregate (subject to reduction as described below), on worldwide net sales of products that were covered by the alliance until such time as they have recovered approximately $260 million, representing the research and development funding paid to us for research and development services performed by us through the termination of the strategic alliance. After this cost recovery, our royalty obligations to Mundipharma and Purdue will be reduced to a one percent royalty on net sales in the United States of products that were previously subject to the strategic alliance. All payments are contingent upon the successful commercialization of products subject to the alliance that are subject to significant further development.

Royalties are payable under these agreements until the later to occur of the last-to-expire of specified patent rights and the expiration of non-patent regulatory exclusivities in a country, provided that if royalties are payable solely on the basis of non-patent regulatory exclusivity, each of the royalty rates is reduced by 50 percent. In addition, royalties payable under these agreements after Mundipharma and Purdue have recovered all research and development expenses paid to us are subject to reduction on account of third party royalty payments or patent litigation damages or settlements which might be required to be paid by us if litigation were to arise, with any such reductions capped at 50 percent of the amounts otherwise payable during the applicable royalty payment period.

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Line of Credit Agreement

The line of credit agreement with PPLP provided for the borrowing by us of one or more unsecured loans up to an aggregate maximum principal amount of $50 million. In November 2011, we borrowed $50 million under this line of credit. On September 7, 2012, upon completion of the sale and issuance of common stock to PPLP under the 2012 securities purchase agreement described below, the line of credit agreement with PPLP terminated in its entirety, and approximately $51 million in principal and interest owed to PPLP under the line of credit agreement was extinguished.

2012 Securities Purchase Agreement

On July 17, 2012, in connection with the termination of the strategic alliance with Mundipharma and Purdue, we executed a securities purchase agreement with PPLP, which we refer to as the 2012 securities purchase agreement, under which we agreed to sell and issue 5,416,565 shares of our common stock to PPLP and two entities associated with PPLP, which we collectively refer to as the BRP entities, at a price of $14.50 per share for an aggregate consideration of approximately $78.5 million and, in connection therewith, to grant various rights to the BRP entities. The consideration was composed of the extinguishment of approximately $51.0 million in principal and interest owed to PPLP under the line of credit agreement and $27.5 million in cash. We completed the sale and issuance on September 7, 2012 at which time the line of credit agreement with PPLP terminated in its entirety. As described below, in April 2013, we entered into a letter agreement with the BRP entities, pursuant to which the 2012 securities purchase agreement terminated in its entirety.

April 2013 Offering and 2013 Termination Agreement

On April 10, 2013, we executed an underwriting agreement with Morgan Stanley & Co. LLC and J.P. Morgan Securities LLC as underwriters, Beacon and Rosebay as selling stockholders, and PPLP, relating to an underwritten public offering of up to 11,416,565 shares of our common stock held by the BRP entities, referred to herein as the public offering. The public offering closed on April 16, 2013, and, as a result, the BRP entities no longer own any shares of our common stock.

In connection with the offering, we entered into letter agreements with the BRP entities, pursuant to which, among other things, the 2012 securities purchase agreement, terminated upon the sale of all of the shares of our common stock held by the BRP entities in the public offering on April 16, 2013.

POLICIES AND PROCEDURES FOR RELATED PERSON TRANSACTIONS

Our board has adopted written policies and procedures for the review of any transaction, arrangement or relationship in which we are a participant, the amount involved exceeds $120,000, and one of our executive officers, directors, director nominees or 5 percent stockholders (or their immediate family members), each of whom we refer to as a “related person,” has a direct or indirect material interest.

If a related person proposes to enter into such a transaction, arrangement or relationship, which we refer to as a “related person transaction,” the related person must report the proposed related person transaction to our Executive Vice President, Chief Financial Officer and Chief Business Officer. The policy calls for the proposed related person transaction to be reviewed and, if deemed appropriate, approved by the Audit Committee. Whenever practicable, the reporting, review and approval will occur prior to entry into the transaction. If advance review and approval is not practicable, the committee will review, and, in its discretion, may ratify the related person transaction. The policy also permits the chair of the committee to review and, if deemed appropriate, approve proposed related person transactions that arise between committee meetings, subject to ratification by the committee at its next meeting. Any related person transactions that are ongoing in nature will be reviewed annually.

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A related person transaction reviewed under the policy will be considered approved or ratified if it is authorized by the committee after full disclosure of the related person’s interest in the transaction. As appropriate for the circumstances, the committee will review and consider:

•

the related person’s interest in the related person transaction;

•

the approximate dollar value of the amount involved in the related person transaction;

•

the approximate dollar value of the amount of the related person’s interest in the transaction without regard to the amount of profit or loss;

•

whether the transaction was undertaken in the ordinary course of our business;

•

whether the terms of the transaction are no less favorable to us than terms that could have been reached with an unrelated party;

•

the purpose of, and the potential benefits to us of, the transaction; and

•

any other information regarding the related person transaction or the related person in the context of the proposed transaction that would be material to investors in light of the circumstances of the particular transaction.

The committee may approve or ratify the transaction only if the committee determines that, under all of the circumstances, the transaction is not inconsistent with our best interests. The committee may impose any conditions on the related person transaction that it deems appropriate.

In addition to the transactions that are excluded by the instructions to the SEC’s related person transaction disclosure rule, our board of directors has determined that the following transactions do not create a material direct or indirect interest on behalf of related persons and, therefore, are not related person transactions for purposes of this policy:

•

interests arising solely from the related person’s position as an executive officer of another entity (whether or not the person is also a director of such entity), that is a participant in the transaction, where (a) the related person and all other related persons own in the aggregate less than a 10 percent equity interest in such entity, (b) the related person and his or her immediate family members are not involved in the negotiation of the terms of the transaction and do not receive any special benefits as a result of the transaction, and (c) the amount involved in the transaction equals less than the greater of $200,000 dollars or 5 percent of the annual consolidated gross revenues of the other entity that is a party to the transaction; and

•

a transaction that is specifically contemplated by provisions of our charter or bylaws.

The policy provides that transactions involving compensation of executive officers shall be reviewed and approved by the Compensation Committee in the manner specified in its charter.

COMPENSATION OF EXECUTIVE OFFICERS

Compensation Discussion and Analysis

This section discusses the principles underlying our policies and decisions with respect to the compensation of our executive officers who are named in the “Summary Compensation Table” below, or our “named executive officers,” and the material factors relevant to an analysis of these policies and decisions.

Executive Summary

Our compensation program is designed to reward strong performance and align incentive awards with stockholder value creation. Awards under our contingent cash compensation and merit stock option programs are

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formulaically tied to the achievement of corporate goals, and we use stock options as a compensation vehicle in order to preserve our cash resources and link compensation with stockholder return. In addition, consistent with our culture of citizen-ownership, other than pursuant to our Executive Severance Benefits Plan described below under the heading “ Components of Our Compensation Program and Relationship to Performance-Severance Benefits, ” all employees are eligible for each element of our compensation program, and our executive officers do not receive any material perquisites or other personal benefits above those offered to all employees.

In January 2014, our executive leadership team recommended to the Compensation Committee of our board of directors that our company’s performance against 2013 goals be assessed at the “below Infinity threshold standards” level. The Compensation Committee agreed with the executive leadership team’s recommendation, noting that while the company had made progress in advancing the development of IPI-145 and strengthening its financial foundation, it would not be appropriate to assess the company’s performance at a level higher than “below Infinity threshold standards” because of the discontinuation of retaspimycin hydrochloride, extension of the Phase 2 study of IPI-145 in patients with asthma into 2014, and extending timelines for filing an IND for IPI-443 into 2014. Below is a full list of the events considered by our executive leadership team and Compensation Committee in their assessment of company performance against 2013 goals:

•

completing a successful public offering in which we raised over $172 million in gross proceeds in December 2012;

•

optimizing our relationship with Millennium: The Takeda Oncology Company and Takeda Pharmaceutical Company Limited (collectively, Millennium) through the amendment and restatement of our development and license agreement with Millennium in December 2012;

•

advancing our PI3K program, including initiating a Phase 2 study evaluating IPI-145 in patients with indolent non-Hodgkin lymphoma, or iNHL, and a Phase 3 study evaluating IPI-145 in patients with chronic lymphocytic leukemia, or CLL, and continuing to progress a Phase 2 study of IPI-145 in rheumatoid arthritis, or RA, and completion of IND-enabling toxicology studies of IPI-443 as our next PI3K development candidate;

•

reporting additional encouraging data from our Phase 1 study of IPI-145 in patients with advanced hematologic malignancies at the 2013 Annual Meeting of the American Society for Clinical Oncology in June and at the 2013 Annual Meeting of the American Society for Hematology in December;

•

discontinuing development of retaspimycin hydrochloride;

•

continuing our Phase 2a study of IPI-145 in patients with mild asthma into 2014;

•

extending our timelines for filing an investigational new drug application, or IND, for IPI-443 into 2014; and

•

expanding our internal operational capabilities through strategic hires within our senior leadership team, including the hire of David Roth who was recently promoted to Chief Medical Officer.

Based on the Compensation Committee’s assessment of 2013 company performance at “below Infinity threshold standards” and in accordance with the company’s established 2013 guidelines, our contingent cash compensation program was not funded for 2013 and our merit stock option program was funded only for non-executive officers. Base salaries for our named executive officers for 2014 were determined following a review of individual named executive officer performance and market data provided by Radford, an Aon Hewitt Company, or Radford, consultant to the Compensation Committee engaged in June 2013. For retention considerations, the Compensation Committee awarded one-time stock option awards to all citizen-owners and additional retention awards to select individuals. Our equity compensation program has also been funded within the equity “burn rate” commitment made to our stockholders in 2010. No material modifications to our compensation programs were introduced in 2013 as we believe our executive compensation program continues to support our compensation philosophy. We also note that our compensation program received the support of approximately 96 percent of the votes cast at our 2011 annual stockholders meeting, which was the last time our compensation program was subject to a stockholder vote.

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Our Named Executive Officers

Our named executive officers for 2013 were:

•

Adelene Q. Perkins, President and Chief Executive Officer; Chair of the Board;

•

Julian Adams, Ph.D., President of Research and Development;

•

Lawrence E. Bloch, M.D., J.D., Executive Vice President, Chief Financial Officer and Chief Business Officer;

•

Vito J. Palombella, Ph.D., Chief Scientific Officer; and

•

Pedro Santabarbara, M.D., Ph.D., Chief Medical Officer.*

*Dr. Santabarbara left the company in February 2014 and was succeeded as Chief Medical Officer by David A. Roth, M.D.

Our Compensation Objectives and Philosophy

Our mission is to sustainably discover, develop and deliver to patients important new medicines that make a material difference in patients’ health, well-being and lives. The objectives of our compensation program are to:

•

attract, retain and motivate the highest caliber scientists and business people to develop and execute our business plan and achieve our mission;

•

ensure that compensation aligns our citizen-owners with our corporate strategy and business objectives;

•

promote the achievement of important and measurable scientific, business, organizational and operational goals by linking contingent cash compensation and long-term equity incentives to the achievement of these goals; and

•

align incentives with the creation of stockholder value.

The Compensation Committee is responsible for reviewing and approving, or recommending for approval to the full board, the compensation of our executive officers. This committee is also responsible for evaluating our company’s performance against its goals, assessing the performance of our executive officers, and ensuring that our compensation program is both aligned with the objectives described above and competitive with those of other companies in our industry that compete with us for talent.

Our compensation program ties a substantial portion of our named executive officers’ overall compensation to the achievement of scientific, business, organizational and operational goals such as:

•

progress in our clinical trials and research programs;

•

maintaining the strong financial health of the company, including implementation of appropriate financing strategies;

•

addition and development of internal competencies and retention of high-performing citizen-owners; and

•

achievement of desired financial performance.

Components of Our Compensation Program and Relationship to Performance

The primary elements of our compensation program are:

•

cash compensation, which includes base salary and performance-based annual cash incentives, which we refer to as contingent cash compensation;

•

annual performance-based stock option awards, which we refer to as merit stock option awards;

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•

stock option awards granted to citizen-owners upon hire and upon promotion; and

•

employee benefits, such as insurance, a 401(k) savings plan, an employee stock purchase plan and severance benefits.

Each of these elements is available to all of our citizen-owners generally, although the amounts of contingent cash compensation and the size of stock option awards differ from person to person based on each citizen-owner’s role, market-competitive compensation, and his or her individual performance.

We do not have any formal or informal policy or target for allocating compensation between long-term and short-term compensation, between cash and non-cash compensation, or among the different forms of non-cash compensation. Instead, the Compensation Committee, after reviewing relevant information for our compensation peer group and other relevant survey data, determines what it believes to be the appropriate level and mix of the various compensation components.

Cash Compensation

Our cash compensation program has two elements: base salary and contingent cash compensation. Base salary is used to recognize the experience, skills, knowledge and responsibilities required of each of our citizen-owners, including each of our executive officers. Contingent cash compensation is used to reward the achievement of company and individual goals. The Compensation Committee adheres to the general principle that base salary levels should be targeted between the 50 th and 75 th percentiles of the market, using peer group market compensation data, with base salaries targeted toward the 75 th percentile of the market for individuals who have demonstrated strong performance and potential. This peer group is described under the heading “ Defining and Comparing Compensation to Market Benchmarks ” below.

Under our contingent cash compensation program, the Compensation Committee establishes pools of cash available for potential award, as a percentage of aggregate payroll for all citizen-owners at specified levels of seniority, based on the committee’s assessment of overall company performance. Once the aggregate amount of cash available for potential award under each such pool is established per level of seniority, such pool is allocated among all citizen-owners at that level of seniority based upon the relative individual performance of each citizen-owner compared to the performance of his or her peers. We believe our contingent cash compensation program provides the following advantages:

•

it is consistent with the growing practice in the biopharmaceutical industry to provide competitive, but not excessive, base salary levels together with performance-based cash incentives;

•

it enables us to achieve our goal of ensuring that total cash compensation is market competitive, thus enhancing our ability to attract and retain the best possible people without increasing fixed salary expense;

•

it rewards both the achievement of company goals and strong individual performance in support of those goals, thus maintaining our culture of combining individual excellence and achievement with community collaboration;

•

it is consistent with our company’s values, as all citizen-owners are eligible to participate in the program; and

•

it further aligns citizen-owner and stockholder interests, as a substantial percentage of our named executive officers’ total compensation is dependent on the achievement of company goals.

The sum of base salary and contingent cash compensation constitutes total cash compensation. The Compensation Committee believes that the total cash compensation for our executive officers should be targeted:

•

below the 50 th percentile of actual total cash compensation for individuals in similar positions at comparable companies for a year in which company performance is below Infinity threshold

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standards , or performance that neither resulted in the achievement of all stated goals for our company, nor was consistent with performance that should reasonably be expected of a biopharmaceutical company of comparable size, resources or stage of development;

•

near the 50 th percentile of actual total cash compensation for individuals in similar positions at comparable companies for a year in which company performance meets Infinity threshold standards , or performance that resulted in the stated goals for our company substantially being met and which was consistent with performance that should reasonably be expected of a biopharmaceutical company of comparable size, resources and stage of development;

•

near the 75 th percentile of actual total cash compensation for individuals in similar positions at comparable companies for a year in which company performance meets Infinity expectations , or performance that exceeded industry standards and met essentially all of our goals (including some “stretch” goals, or goals that we believe could prove difficult to achieve) and exceeded some of our goals, with any failure to achieve a major goal being the result of factors outside of our reasonable control; and

•

above the 75 th percentile of actual total cash compensation for individuals in similar positions at comparable companies for a year in which company performance exceeds Infinity expectations , or performance that far exceeded industry standards and resulted in our goals largely being exceeded.

Consistent with this philosophy, the Compensation Committee established 2013 contingent cash compensation targets for our executive officers at the following percentages of aggregate payroll of citizen-owners at the specified level of seniority:

2013 Contingent Cash Compensation Targets

Below Infinity
Threshold
Standards
Infinity
Threshold
Standards
Meets Infinity
Expectations
Exceeds  Infinity
Expectations

(Maximum)

Chief Executive Officer

0 % 40 % 60 % 80 %

President of Research and Development

0 % 35 % 45 % 75 %

Executive Vice President/“C” Level Officer

0 % 30 % 40 % 60 %

Stock Options

Our equity award program is the primary vehicle for offering long-term incentives to all of our citizen-owners, including our named executive officers. We believe that equity grants are fundamental to creating a culture of citizen-ownership, providing our citizen-owners with a strong link to our long-term performance and aligning the interests of our citizen-owners and our non-employee stockholders by allowing citizen-owners to participate in the longer term success of our company as reflected in stock price appreciation. In addition, the vesting feature of our equity grants is intended to further our goal of retention because it provides an incentive for our citizen-owners, including our named executive officers, to remain in our employ during the vesting period.

Our equity awards have generally taken the form of stock options. Stock options granted to new citizen-owners upon their hire typically vest as to one-quarter of the shares on the first anniversary of the date of hire, and in equal monthly installments over the following three years. Stock options granted annually under our merit stock option program (described below) typically vest in equal monthly installments over four years. Stock options granted to citizen-owners upon promotion to a more senior position (described below) also typically vest in equal monthly installments over four years. Additionally, the Compensation Committee may exercise its discretion to grant one-time awards to some or all citizen-owners from time to time. All stock options granted under our equity incentive plans have a maximum term of ten years and substantially all awards have vesting and exercise rights that cease shortly after termination of service to our company. Prior to the exercise of an option,

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the holder has no rights as a stockholder with respect to the shares subject to such option, including no voting rights and no right to receive dividends or dividend equivalents. The exercise price for each stock option share is equal to the closing price of a share of our common stock on the date of grant. All equity-based awards made to our named executive officers are approved by the Compensation Committee.

We do not time option grants to our named executive officers in coordination with our release of material non-public information and our named executive officers are prohibited from pledging or engaging in short sales or derivative transactions of company securities. We have not adopted stock ownership guidelines for our named executive officers, in part due to the historic stock ownership of these officers (see “Stock Ownership of Certain Beneficial Owners and Management” elsewhere in this proxy statement). We do, however, encourage all of our citizen-owners to maintain an equity position in our company.

All our citizen-owners, including our named executive officers, are eligible to receive merit stock option grants in connection with the annual performance review process. The Compensation Committee establishes pools of stock options available for potential award to citizen-owners at specified levels of seniority, based on pre-determined fixed-share guidelines and, for individuals in roles at or above a Vice President, the committee’s assessment of overall company performance. Once the aggregate amount of stock options available for potential award under each such pool is established per level of seniority, such pool is allocated among all citizen-owners at that level of seniority based upon relative future potential of each citizen-owner compared to the future potential of his or her peers. The fixed-share guideline is established annually at the beginning of the plan year and is based on an assessment of peer company equity practices.

The Compensation Committee established 2013 targets for annual merit stock option awards for senior-levels of citizen-owner at the following levels in shares:

2013 Annual Merit Stock Option Award Targets

Below Infinity
Threshold
Standards
Infinity
Threshold
Standards
Meets Infinity
Expectations
Exceeds  Infinity
Expectations

(Maximum)

Chief Executive Officer

0 130,000 162,500 214,500

President of Research & Development

0 86,000 107,500 142,000

Executive Vice President/“C” Level Officer

0 40,000 60,000 80,000

All of our citizen-owners, including our named executive officers, are also eligible to receive stock option grants in conjunction with a promotion to a more senior position. The number of stock options granted is equal to the difference obtained by subtracting the number of stock options that would be granted to such citizen-owner as if he or she were to be newly hired into his or her previous position from the number of stock options that would be granted to such citizen-owner if he or she were to be newly hired into his or her new position.

In determining the size of stock option awards to our named executive officers, the Compensation Committee also considers factors such as:

•

share ownership of comparable executive officers;

•

our annual company performance;

•

the applicable officer’s individual performance;

•

the amount of equity previously awarded to the officer; and

•

the amount of equity previously awarded to the officer that remains unvested.

The Compensation Committee also evaluates the potential dilution that new stock option grants will have on the ownership interests of our stockholders, the commitment we have made to our stockholders with respect to our

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equity “burn rate” (that is, the number of shares subject to equity awards granted as a percentage of the weighted average number of shares of our common stock outstanding), and the number of shares of our common stock that are available for award under our equity incentive plan. In 2010, we made a commitment to our stockholders for three fiscal years beginning with our 2010 fiscal year not to exceed an average 3-year equity burn rate of 7.31 percent, which we have honored by achieving a 3-year average burn rate of 5.62 percent. Notably, our 3-year average burn rate also falls well below the burn rate cap of 6.7 percent established by Institutional Shareholder Services, Inc., or ISS, for Russell 3000 companies in our industry.

Benefits and Other Compensation

We provide a broad-based benefits program for all of our citizen-owners, including health, dental and vision insurance, life and disability insurance, group insurance discounts, first-time homebuyer’s assistance, educational assistance, paid vacation time, paid sabbatical leave following five years of service, subsidized parking, an employee stock purchase plan, and a 401(k) savings plan. Our named executive officers are eligible to participate in all of our benefit plans, in each case on the same basis as other citizen-owners. Our employee stock purchase plan permits citizen-owners to purchase shares of our common stock at a discount and consists of consecutive, overlapping 24-month offering periods, each consisting of four six-month purchase periods. On the first day of each offering period, each employee who is enrolled in the employee stock purchase plan will automatically receive an option to purchase up to a whole number of shares of our common stock. The purchase price of each of the shares purchased in a given purchase period will be 85 percent of the closing price of a share of our common stock on the first day of the offering period or the last day of the purchase period, whichever is lower. Under the company-matching feature under our 401(k) savings plan, we match 50 percent of each citizen-owner’s contributions, up to a maximum of 6 percent of such citizen-owner’s base salary and subject to applicable IRS limitations, to our 401(k) savings plan with shares of our common stock having a value equal to such contribution, based on the fair market value of our common stock on the last day of the quarter.

Given our objective of attracting the highest caliber talent, we often recruit talented individuals from outside of the Boston area to fill open positions. We generally provide reasonable relocation assistance to those individuals. We provided such assistance, including reimbursement for the reasonable cost of temporary housing, immigration and income tax advisory services, to Dr. Santabarbara during 2010 and 2011 in connection with his relocation from Spain. The amount of this assistance for 2011 is included in the Summary Compensation Table below under the heading “ All Other Compensation. ”

Consistent with industry practice and our philosophy of offering benefits to all of our citizen-owners generally, we have not provided any material perquisites or other personal benefits to our named executive officers.

Severance Benefits

In 2013, we established an Executive Severance Benefits Plan, or the severance plan, which provides eligible full time executives holding the title of Executive Vice President or above certain severance benefits upon a termination without cause or a resignation for good reason including in each case within one year following a change in control, which we refer to as a covered termination. The severance plan supersedes the provisions of any agreements between any severance plan participant and the company that provide for severance benefits, including the offer letters of Ms. Perkins and Drs. Adams and Bloch. Pursuant to the severance plan, each executive who is subject to a covered termination is entitled to:

•

continuation of such executive’s monthly base salary for the twelve-month period following termination;

•

payment by us of a portion of the cost of COBRA continuation of benefits coverage for the executive and his or her applicable dependents for the twelve-month period following such termination or until the executive commences new employment and is eligible for new plan coverage, if sooner, subject to certain conditions set forth in the severance plan;

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•

reasonable outplacement benefits for up to six months at the discretion of the severance plan’s administrator or until the executive commences new employment, if sooner;

•

any unpaid annual bonus in respect to any completed bonus period which has ended prior to the date of the executive’s termination and which our board of directors deems granted to the executive in its discretion pursuant to our contingent compensation program;

•

at the sole discretion of the severance plan’s administrator, the prorated amount of any minimum bonus award approved by the Compensation Committee of the Board for the year in which the covered termination occurs; and

•

immediate vesting of the portion of any outstanding equity awards of the executive which would have vested within the one (1) year-period following such covered termination.

We believe providing these benefits enhances our ability to attract and retain executive talent and aligns with stockholder interests. Based on a review of practices of comparable companies by Towers Watson, the consultant to our Compensation Committee prior to our transition to Radford, we believe that our severance benefits are generally in line with severance packages offered to executives by such companies.

We have structured severance benefits following a change in control as “double trigger” benefits. This means that benefits are paid upon (1) a change in control, or the first trigger, and (2) the termination of executive during the 12-month period following the change in control, or the second trigger. We believe a “double trigger” structure maximizes stockholder value because it prevents an unintended windfall to executives in the event of a friendly change in control and provides the executive with appropriate incentives to cooperate in negotiating any change in control in which they believe they may lose their jobs.

Our severance plan does not provide any “gross-up” for the amount of excise tax liability, if any, under Section 4999 of the Internal Revenue Code of 1986, as amended, or the Code, related to “excess golden parachute payments” provisions under Section 280G of the Code.

Our Performance Evaluation Process

Our executive leadership team prepares and submits for approval by our board of directors a set of annual corporate goals. These corporate goals are directed to specific scientific, business, organizational and operational objectives and represent, in many cases, “stretch” goals that may prove difficult to achieve. Most of these objectives are focused on near-term drivers of stockholder value, but given our mission to discover, develop and deliver new medicines on a sustainable basis, a significant number of our objectives are also directed to the maintenance and enhancement of the foundations for our future success. Upon approval of the overall corporate goals by our board of directors, departmental and individual goals are set by our executive leadership team focusing on contributions that facilitate the achievement of these corporate goals.

Near the end of each year, our executive leadership team evaluates company performance against the goals for that year. With respect to company performance, the executive leadership team conducts a qualitative and quantitative assessment of the company’s overall performance against goals and determines performance at one of the following levels:

•

below Infinity threshold standards;

•

meets Infinity threshold standards;

•

meets Infinity expectations; or

•

exceeds Infinity expectations.

Please refer to “ Components of Our Compensation Program and Relationship to Performance – Cash Compensation ” above for a description of how each of these levels is defined.

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This assessment by our executive leadership team is then presented to the Compensation Committee for its review. The Compensation Committee has the discretion to determine that company performance against goals was achieved at a level other than the one recommended by our executive leadership team. The Compensation Committee may review, and historically has reviewed, its assessment with our board of directors, although it is not required to do so.

In addition to evaluating company performance, we evaluate the individual contributions of each citizen-owner for the year. Each citizen-owner’s evaluation begins with a written self-assessment, which is submitted to that citizen-owner’s manager. In addition, each citizen-owner’s manager solicits input from others within and/or outside of our company, in what is commonly referred to as a “360 review process.” In the case of Ms. Perkins, our Vice President of Human Resources solicits and organizes this feedback. Based on this input, the manager then prepares a written performance review representing the manager’s assessment of the citizen-owner’s individual performance and future potential.

Dr. Adams prepares written performance reviews of his direct reports (for 2013, Drs. Palombella and Santabarbara), and Ms. Perkins prepares written performance reviews of Drs. Adams and Bloch, each based on:

•

the applicable officer’s self-assessment;

•

feedback received during the 360 review process from members of our executive leadership team, representative direct reports of the executive officer, and other individuals within and outside of our company from whom feedback is deemed relevant in order to make a meaningful assessment of the applicable officer’s performance and areas for future development; and

•

the applicable manager’s personal assessment.

Ms. Perkins prepares a written self-assessment and submits it to the Chair of the Compensation Committee. Additional assessments of her individual performance are obtained through feedback received from individual members of our board of directors and members of our executive leadership team and other citizen-owners with whom Ms. Perkins regularly interacts. On the basis of this feedback, the Compensation Committee conducts a subjective evaluation of Ms. Perkins’ individual performance and future potential:

•

based on our company’s performance against its goals;

•

in providing leadership of our company in the pursuit of these goals;

•

in providing mentorship to her direct reports; and

•

based on progress against her personal and professional development goals.

Determining and Setting Executive Compensation

Individual compensation decisions by the Compensation Committee are driven primarily by an assessment of company and individual performance against predetermined goals which are primarily qualitative (i.e., pipeline and milestone-based) rather than an array of financial metrics. We believe that the approach taken by the Compensation Committee is appropriate given the stage of development and strategic mission of our company. We do not believe that the market capitalization of development-stage biopharmaceutical companies is generally tied to the achievement of objective financial metrics, such as net loss or loss per share; therefore, we do not believe the application of such metrics to determine compensation is appropriate, nor do we believe that the failure to apply such formulaic standards creates a misalignment between incentives and creation of stockholder value. In addition, we believe the success of our product development programs will be a function of management being responsive to new data and prioritizing long-term success over the achievement of short-term objectives. As such, we believe a compensation program that does not penalize management for failing to meet a specific short-term development objective in order to create the greatest opportunity for our product development programs to be sustainably successful in the long term creates appropriate incentives and is in the best interest of

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our company and its stockholders. This approach appears to be satisfactory to our stockholders given that approximately 96 percent of the votes cast at our 2011 annual stockholders meeting were voted in favor of the non-binding, advisory proposal on the compensation of our executive officers, which was the last time our compensation program was subject to a stockholder vote.

In addition to its assessments of company and individual performance, the Compensation Committee also considers the compensation of executives in similar roles in peer companies in setting base salary and target contingent compensation opportunity for our named executive officers.

Defining and Comparing Compensation to Market Benchmarks

During 2013, our compensation committee engaged Radford for assistance in conducting a competitive compensation assessment for our executive officers. In evaluating the total compensation of our executive officers, the Compensation Committee, with the assistance of Radford, established a peer group of 16 publicly traded, national and regional companies in the biopharmaceutical and biotechnology industries that was selected based on a balance of the following criteria:

•

companies whose market capitalization, number of employees, maturity of product development pipeline and area of therapeutic focus are similar to ours;

•

companies against which we believe we compete for executive talent; and

•

public companies based in the United States whose compensation and financial data are available in proxy statements or other public documents.

Based on these criteria, our peer group for 2013, referred to as our 2013 peer group, was comprised of the following companies:

Alnylam Pharmaceuticals, Inc.

Arena Pharmaceuticals, Inc.

Ariad Pharmaceuticals, Inc.

Array BioPharma, Inc.

Astex Pharmaceuticals, Inc.

Celldex Therapeutics, Inc.

Clovis Oncology, Inc.

Dyax Corporation

Exelixis, Inc.

Idenix Pharmaceuticals, Inc.

ImmunoGen, Inc.

Incyte Corporation

Isis Pharmaceuticals, Inc.

Momenta Pharmaceuticals, Inc.

Rigel Pharmaceuticals, Inc.

Synta Pharmaceuticals Corp.

The peer group for our named executive officers is approved by the Compensation Committee annually, and the following companies that had been included in our peer group in 2012 were removed from our 2013 peer group either because of merger & acquisition activity or based on the committee’s assessment that the company’s profile ceased to meet the criteria we consider when selecting our peer group: Affymax, Inc., AVEO Pharmaceuticals, Inc., ArQule, Inc., ZioPharm Oncology, Inc., and Threshold Pharmaceuticals, Inc. In addition, Ariad Pharmaceuticals, Inc., Celldex Therapeutics, Inc., Clovis Oncology, Inc., Incyte Corporation, and Isis Pharmaceuticals, Inc. were added to the 2013 peer group on the basis of their therapeutic focus, financial profile and stage of development.

The Compensation Committee also compared the total compensation of our executive leadership team to a broader biotechnology industry group, which, for 2013, consisted of 37 publicly held biotechnology and biopharmaceutical companies listed in the 2013 Radford Global Life Sciences Survey with a market cap between $500 million and $4 billion. When conducting its review of our executive compensation programs, the Compensation Committee considered the compensation of our 2013 peer group and the larger survey group described above.

We believe that the compensation practices of our 2013 peer group provide us with appropriate compensation benchmarks for evaluating the compensation of our named executive officers. Notwithstanding the similarities of the 2013 peer group to Infinity, due to the nature of our business, we compete for executive talent

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with many companies that are larger and better established than we are or that possess greater resources than we do, as well as with prestigious academic and non-profit institutions. Other considerations, including market factors, the experience level of the executive and the executive’s performance against established corporate goals and individual objectives, may require that we vary from our historic compensation practices or deviate from our general compensation philosophy under certain circumstances.

2013 Contingent Compensation Decisions

2013 Company Goals and Assessment of Performance Against Those Goals

Consistent with our goal-setting process described above, our board of directors approved the following corporate goals for 2013:

1. Establish recommended Phase 2 dose and initiate at least three trials of IPI-145 in hematologic malignancies;

2. Obtain proof of activity of IPI-145 in patients with asthma;

3. Remain on track to obtain proof of activity of IPI-145 in patients with rheumatoid arthritis in 2014

4. Finalize development strategy of IPI-443 to support first in human clinical study and file an IND or CTA in 2013;

5. Be in a position to initiate a global registration-enabling clinical study of retaspimycin HCl, following readout of results from the company’s Phase 2 study of retaspimycin HCl in patients with NSCLC;

6. Nominate one development candidate (internal or external) by end of or acquire rights to a high-quality DC or clinical asset that has demonstrated human POC without compromising progress on existing Infinity programs;

7. Maintain strong financial profile to enable corporate strategy and value creation;

8. Maintain thriving, integrated citizen-ownership culture; and

9. Maintain scientific, medical, business, commercial and operational excellence.

For purposes of evaluating performance against these goals, our board of directors approved a weighting system so that the first six goals listed above would account for, in the aggregate, 65 percent of the assessment, and the remaining goals would account for, in the aggregate, 35 percent of the assessment. This weighting system reflects the philosophy that advances in our clinical development programs representing near-term opportunities to create value should carry greater weight than company foundational goals.

In January 2014, our executive leadership team recommended to the Compensation Committee of our board of directors that our company’s performance against 2013 goals be assessed at the “below Infinity threshold standards” level. The Compensation Committee agreed with the executive leadership team’s recommendation, noting that while the company had made progress in advancing the development of IPI-145 and strengthening its financial foundation, it would not be appropriate to assess the company’s performance at a level higher than “below Infinity threshold standards” because of the discontinuation of retaspimycin hydrochloride, extension of the Phase 2 study of IPI-145 in patients with asthma into 2014, and extending timelines for filing an IND for IPI-443 into 2014. Below is a full list of the events considered by our executive leadership team and Compensation Committee in their assessment of company performance against 2013 goals:

•

completing a successful public offering in which we raised over $172 million in gross proceeds in December 2012;

•

optimizing our relationship with Millennium: The Takeda Oncology Company and Takeda Pharmaceutical Company Limited (collectively, Millennium) through the amendment and restatement of our development and license agreement with Millennium in December 2012;

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•

advancing our PI3K program, including initiating a Phase 2 study evaluating IPI-145 in patients with indolent non-Hodgkin lymphoma, or iNHL, and a Phase 3 study evaluating IPI-145 in patients with chronic lymphocytic leukemia, or CLL, and continuing to progress a Phase 2 study of IPI-145 in rheumatoid arthritis, or RA, and completion of IND-enabling toxicology studies of IPI-443 as our next PI3K development candidate;

•

reporting additional encouraging data from our Phase 1 study of IPI-145 in patients with advanced hematologic malignancies at the 2013 Annual Meeting of the American Society for Clinical Oncology in June and at the 2013 Annual Meeting of the American Society for Hematology in December;

•

discontinuing development of retaspimycin hydrochloride;

•

continuing our Phase 2a study of IPI-145 in patients with mild asthma into 2014;

•

extending our timelines for filing an investigational new drug application, or IND, for IPI-443 into 2014; and

•

expanding our internal operational capabilities through strategic hires within our senior leadership team, including the hire of David Roth who was recently promoted to Chief Medical Officer.

Contingent Cash Compensation Awards and Merit Stock Option Awards

Based on the Compensation Committee’s assessment of 2013 company performance at “below Infinity threshold standards” and in accordance with the company’s established 2013 guidelines, the company did not fund a contingent cash compensation program or a merit stock option program for named executive officers for 2013.

For our executive officers, the Compensation Committee reviewed such officer’s individual performance based on each officer’s self-assessment, feedback obtained from the 360 review process and, to the extent applicable, the written evaluation of the officer’s manager. The achievements of each of our named executive officers that were considered by the Compensation Committee included:

•

Ms. Perkins: successful overall leadership of our company strategy and operations; leadership in advancing our organization, including the advancement of our PI3K program; overall decision making relating to our product portfolio; completion of a successful public offering in which we raised over $172 million in gross proceeds; leadership through business development opportunities; strong external presence; cultivation of our company culture and development of members of our executive leadership team; effective ongoing financial management of our company; and effective interactions with our board of directors.

•

Dr. Adams: leadership in advancing our product development portfolio and R&D organization, including leading scientific and clinical development of our Phase 2 study of IPI-145 in patients with indolent non-Hodgkin lymphoma; commencing a Phase 3 study investigating IPI-145 in patients with CLL; continuing to progress a Phase 2 study of IPI-145 in RA; completion of IND-enabling toxicology studies of IPI-443 as our next PI3K development candidate; successfully leading the organization through the closure of the Hsp90 (retaspimycin hydrochloride) program; support for evolutions in our R&D organization to enhance their operational effectiveness; active participation in the evaluation of business development opportunities; development of a strong external presence through advisory and similar activities; development of his senior staff; and continued development of strong relationships between our company and academic and industry leaders and clinical investigators.

•

Dr. Bloch: strategic leadership of the corporate and business development, legal, corporate communications, and finance/accounting functions; maintaining the financial health of the organization through the completion of a successful public offering in which we raised over $172 million in gross proceeds; optimizing our relationship with Millennium through the amendment and restatement of our development and license agreement with Millennium in December 2012; development of strong

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external investor relationships; leadership in business development opportunities; successfully recruited and hired key leadership roles within his functions and developed the existing business leadership team.

•

Dr. Palombella: strong overall scientific contributions and leadership relating to our clinical stage and early discovery portfolio; significant contributions to the advancement of our PI3K program including reporting additional encouraging data from our Phase 1 study of IPI-145 in patients with advanced hematologic malignancies at the 2013 Annual Meeting of the American Society for Hematology in December; leadership in business development opportunities; successfully led the organization through the closure of the Hsp90 program; leadership in progressing our early discovery programs; strong management of our discovery organization; strong company leadership as part of the executive team.

•

Dr. Santabarbara: successfully executing on a Chief Medical Officer succession plan, including the hire of David Roth, who was recently promoted to Chief Medical Officer; success in recruiting and hiring key leadership roles within our clinical development organization; guidance in reporting additional encouraging data from our Phase 1 study of IPI-145 in patients with advanced hematologic malignancies at the 2013 Annual Meeting of the American Society for Clinical Oncology; leadership in the advancement of our PI3K program across all clinical indications; strong support in enhancing our drug safety, medical writing and data management functions.

As a consequence of these decisions, total contingent cash compensation, total cash compensation and total merit stock option awards for our named executive officers were the following:

2013 Merit Stock
Option Awards
2013 Contingent Cash
Compensation Award
2013 Total
Cash Compensation

Ms. Perkins

0 $ 0 $ 552,000

Dr. Adams

0 0 465,800

Dr. Bloch

0 0 378,800

Dr. Palombella

0 0 366,400

Dr. Santabarbara

0 0 398,100

Retention Stock Option Awards

The Compensation Committee elected to award one-time retention stock option grants to all citizen-owners of Infinity, including named executive officers, citing competitive pressures, recognition of partial achievement of company goals, and the importance of maintaining continuity of our executive management team in ensuring the near-term and long-term success of the company. As a consequence, based on an assessment of future potential and level of seniority of each of our named executive officers, the total retention stock option awards for our named executive officers were the following:

Number of Shares Subject to 2013
Retention Stock Option Award

Ms. Perkins

85,500

Dr. Adams

56,900

Dr. Bloch

32,200

Dr. Palombella

32,200

Dr. Santabarbara

16,600

Each of these options have a ten-year term, ratable monthly vesting over four years, and an exercise price equal to the closing price of a share of our common stock on the NASDAQ Global Select Market on the date of grant.

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Establishment of 2014 Compensation Targets

Based on a review of market data provided by Radford and the current compensation levels of our named executive officers, in January 2014, the Compensation Committee approved merit-based salary increases for each of our named executive officers. The 2014 base salaries of each of our named executive officers are:

2014
Base Salary
% Increase
over 2013

Ms. Perkins

$ 568,500 3.0 %

Dr. Adams

479,500 3.0 %

Dr. Bloch

390,000 3.0 %

Dr. Palombella

381,000 4.0 %

Dr. Santabarbara

406,000 2.0 %

Based on a review of market data provided by Radford and the 2014 base salaries of our executive officers, in January 2014, the Compensation Committee set target contingent cash compensation opportunities for our executive officers at the following levels:

2014 Contingent Cash Compensation Targets

Below Infinity
Threshold
Standards
Infinity Threshold
Standards
Meets Infinity
Expectations
Exceeds  Infinity
Expectations

(Maximum)

Chief Executive Officer

0 % 40 % 65 % 80 %

President of Research and Development

0 % 35 % 50 % 75 %

Executive Vice President/“C” Level Officer

0 % 30 % 40 % 60 %

Finally, based on a review of market data provided by Radford, the value of current long-term incentive compensation for our executive officers, retention considerations, and the impact of equity awards on stockholder dilution, in January 2014, the Compensation Committee established targets for annual merit stock option awards at the following levels, in shares, based on level of seniority and company and individual officer performance, which are unchanged from 2013:

2014 Annual Merit Stock Option Award Targets

Below Infinity
Threshold
Standards
Infinity Threshold
Standards
Meets Infinity
Expectations
Exceeds  Infinity
Expectations

(Maximum)

Chief Executive Officer

Board Discretion 130,000 162,500 214,500

President of Research & Development

Board Discretion 86,000 107,500 142,000

Executive Vice President/“C” Level Officer

Board Discretion 40,000 60,000 80,000

Accounting and Tax Considerations

While the Compensation Committee generally considers the financial accounting and tax implications to our company of its executive compensation decisions, neither element was a material consideration in the compensation awarded to our named executive officers in 2013. For example, Section 162(m) of the Code generally disallows a tax deduction for compensation in excess of $1.0 million paid by a public company to its chief executive officer and to each other officer (other than its chief financial officer) whose compensation is required to be reported to stockholders by reason of being among the three most highly paid executive officers. Qualified performance-based compensation is not subject to the deduction limitation if specified requirements are met by us. We will periodically review the potential consequences of Section 162(m) on the various elements of our executive compensation program. Our board of directors or compensation committee may, in its judgment, authorize compensation payments that do not comply with the exemptions in Section 162(m) when it believes that such payments are appropriate to attract and retain executive talent.

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Summary Compensation Table

Name and Principal Position

Year Salary
($)
Bonus
($)
Stock
Awards
($)
Option
Awards
($)(1)
Non-Equity
Incentive Plan
Compensation

($)(2)
Change in
Pension
Value and
Nonqualified
Deferred
Compensation
Earnings ($)
All Other
Compensation
($)
Total ($)

Adelene Q. Perkins,

2013 $ 552,000 $ — $ — $ 3,300,545 $ — $ — $ 8,616 (4) $ 3,861,161

President and Chief Executive Officer(3)

2012 536,000 — — 895,473 293,031 — 8,466 (5) 1,732,970
2011 519,000 — — 526,604 301,000 — 7,830 (6) 1,354,434

Julian Adams, Ph.D.,

2013 $ 465,800 — — $ 2,183,700 $ — — 1,806 (7) 2,651,306

President of R&D

2012 452,200 — — 592,390 191,416 — 1,806 (7) 1,237,812
2011 438,000 — — 348,369 232,140 — 480 (7) 1,018,989

Lawrence E. Bloch,

2013 $ 378,800 — — $ 703,727 $ — — 8,280 (8) 1,090,807

M.D., J.D. Chief Financial Officer and Chief Business Officer

2012 191,064 25,000 — 1,826,000 47,500 — 5,255 (9) 2,094,819

Vito J. Palombella, Ph.D.

2013 $ 366,400 — — $ 1,407,455 $ — — 14,106 (10) 1,787,961

Chief Scientific Officer

2012 352,250 — — 220,125 178,200 — 8,466 (5) 759,041
2011 340,000 — — 129,626 177,500 — 7,830 (6) 654,956

Pedro Santabarbara,

M.D., Ph.D. Former

Chief Medical Officer

2013 $ 398,100 — — $ 938,339 $ — — 15,912 (11) 1,352,351
2012 390,250 — — 220,125 98,700 — 10,272 (12) 719,347
2011 380,000 50,000 — — 148,800 — 48,767 (13) 627,567

(1) The amounts in this column reflect the aggregate grant date fair value of awards made during the applicable fiscal year. See the information in Note 3, “Stock Based Compensation,” to our consolidated financial statements, included as part of our Annual Report on Form 10-K for the year ended December 31, 2013, for assumptions made in determining these values.
(2) The amounts in this column reflect amounts paid to each of our named executive officers under the contingent cash compensation program described in “Compensation Discussion and Analysis” above.
(3) Ms. Perkins received the amounts listed above for service as our President and Chief Executive Officer and received no compensation for service as a director. During the year ended December 31, 2013, Ms. Perkins was granted option awards with the grant date fair value set forth below under the heading “Grants of Plan-Based Awards Table.” As of December 31, 2013, Ms. Perkins did not hold any stock awards, but held options to purchase an aggregate of 1,334,572 shares of our common stock.
(4) Includes $966 in life insurance premiums paid on behalf of Ms. Perkins and $7,650 in value of the shares of our common stock contributed to the officer’s 401(k) plan account as a matching contribution.
(5) Includes $966 in life insurance premiums paid on behalf of the officer and $7,500 in value of the shares of our common stock contributed to the officer’s 401(k) plan account as a matching contribution.
(6) Includes $480 in life insurance premiums paid on behalf of the officer and $7,350 in value of the shares of our common stock contributed to the officer’s 401(k) plan account as a matching contribution.
(7) Represents life insurance premiums paid on behalf of Dr. Adams.
(8) Includes $630 in life insurance premiums paid on behalf of Dr. Bloch and $7,650 in value of the shares of our common stock contributed to Dr. Bloch’s 401(k) plan account as a matching contribution.
(9) Includes $279 in life insurance premiums paid on behalf of Dr. Bloch and $4,976 in value of the shares of our common stock contributed to Dr. Bloch’s 401(k) plan account as a matching contribution.
(10) Includes $966 in life insurance premiums paid on behalf of the Dr. Palombella, $7,650 in value of the shares of our common stock contributed to the officer’s 401(k) plan account as a matching contribution, and $5,490 in value of the shares of our common stock purchased pursuant to our ESPP.
(11) Includes $2,772 in life insurance premiums paid on behalf of Dr. Santabarbara, $7,650 in value of the shares of our common stock contributed to Dr. Santabarbara’s 401(k) plan account as a matching contribution, and $5,490 in value of the shares of our common stock purchased pursuant to our ESPP.
(12) Includes $2,772 in life insurance premiums paid on behalf of Dr. Santabarbara and $7,500 in value of the shares of our common stock contributed to Dr. Santabarbara’s 401(k) plan account as a matching contribution.
(13) Includes $480 in life insurance premiums paid on behalf of Dr. Santabarbara, $7,350 in value of the shares of our common stock contributed to Dr. Santabarbara’s 401(k) plan account as a matching contribution and $40,937 in relocation expenses paid on behalf of Dr. Santabarbara.

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Grants of Plan-Based Awards Table

Grant
Date
Estimated Future
Payouts Under Non-
Equity Incentive Plan
Awards (1)
Estimated Future
Payouts Under Equity
Incentive Plan Awards
All
Other
Stock
Awards:
Number
of Shares
of Stock
or Units
(#)
All Other
Option
Awards:
Number of
Securities
Underlying
Options
(#)
Exercise
or Base
Price of
Option
Awards
($/Sh)
Grant
Date Fair
Value of
Stock and
Option
Awards
($)

Name

Threshold
($)
Target
($)
Maximum
($)
Threshold
(#)
Target
(#)
Maximum
(#)

Adelene Q. Perkins

1/4/13 — — — — — — 153,835 (2) $ 36.85 $ 3,300,545 (3)

Julian Adams, Ph.D.

1/4/13 — — — — — — 101,780 (2) 36.85 2,183,700 (3)

Lawrence E. Bloch, M.D., J.D.

1/4/13 — — — — — — 32,800 (2) 36.85 703,727 (3)

Vito J. Palombella, Ph.D.

1/4/13 — — — — — — 65,600 (2) 36.85 1,407,455 (3)

Pedro Santabarbara, M.D., Ph.D.

1/4/13 — — — — — — 43,735 (2) 36.85 938,338 (3)

(1) Each of our citizen-owners, including our named executive officers, is eligible to participate in a performance-based cash bonus program. The aggregate amount available for potential award under this program to all of our citizen-owners, including our named executive officers, if any, is a function of company performance against goals; the amounts payable to each of our named executive officers, if any, are based on a subjective assessment of individual performance by the Compensation Committee. As such, threshold, target and maximum are not determinable. See “Compensation Discussion and Analysis—Components of our Compensation Program and Relationship to Performance—Cash Compensation” above.
(2) Vested as to 1/48th of the shares on January 31, 2013 and vests as to 1/48th of the shares at the end of each calendar month thereafter.
(3) Based on a grant date fair value of approximately $21.46 per share.

Outstanding Equity Awards at Fiscal Year-End Table

Option Awards Stock Awards

Name

Number of
Securities
Underlying
Unexercised
Options (#)
Exercisable
Number of
Securities
Underlying
Unexercised
Options (#)
Unexercisable
Equity
Incentive
Plan
Awards:
Number of
Securities
Underlying
Unexercised
Unearned
Options (#)
Option
Exercise
Price
($)
Option
Expiration
Date
Number of
Shares
or Units
of Stock
That
Have  Not
Vested
(#)
(1)
Market
Value of
Shares
or Units
of Stock
That
Have
Not
Vested
($)
Equity
Incentive
Plan
Awards:
Number of
Unearned
Shares,
Units or
Other
Rights
That
Have Not
Vested
(#)
Equity
Incentive
Plan
Awards:
Market
or Payout
Value of
Unearned
Shares,
Units or
Other
Rights
That
Have Not
Vested
($)

Adelene Q. Perkins

170,568 — 13.59 1/25/2017
117,796 — 9.80 12/13/2017
96,073 — 7.18 12/4/2018
130,000 — 7.18 12/4/2018
50,000 — 7.27 1/5/2019
340,930 — 6.25 1/5/2020
43,483 40,137 (1) 5.94 1/6/2021
95,875 95,875 (2) 7.93 1/6/2022
38,459 115,376 (3) 36.85 1/4/2023

Julian Adams, Ph.D.

200,000 — 13.59 1/25/2017
111,200 — 9.80 12/13/2017
110,000 — 7.18 12/4/2018
50,000 — 7.27 1/5/2019
104,000 — 6.25 1/5/2020
79,658 26,552 (1) 5.94 1/6/2021
63,425 63,425 (2) 7.93 1/6/2022
25,445 76,335 (3) 36.85 1/4/2023

Lawrence E. Bloch, M.D., J.D.

70,833 129,167 (4) 15.85 7/23/2022
8,200 24,600 (3) 36.85 1/4/2023

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Option Awards Stock Awards

Name

Number of
Securities
Underlying
Unexercised
Options (#)
Exercisable
Number of
Securities
Underlying
Unexercised
Options (#)
Unexercisable
Equity
Incentive
Plan
Awards:
Number of
Securities
Underlying
Unexercised
Unearned
Options (#)
Option
Exercise
Price
($)
Option
Expiration
Date
Number of
Shares
or Units
of Stock
That
Have  Not
Vested
(#)
(1)
Market
Value of
Shares
or Units
of Stock
That
Have
Not
Vested
($)
Equity
Incentive
Plan
Awards:
Number of
Unearned
Shares,
Units or
Other
Rights
That
Have Not
Vested
(#)
Equity
Incentive
Plan
Awards:
Market
or Payout
Value of
Unearned
Shares,
Units or
Other
Rights
That
Have Not
Vested
($)

Vito J. Palombella, Ph.D.

24,418 — 2.04 5/10/2015
5,856 — 3.48 3/31/2016
59,709 — 13.59 1/25/2017
20,815 — 9.80 12/13/2017
35,415 — 7.18 12/4/2018
15,440 — 6.25 1/5/2020
111,979 13,021 (5) 7.94 5/12/2020
29,640 9,880 (1) 5.94 1/6/2021
23,568 23,568 (2) 7.93 1/6/2022
16,400 49,200 (3) 36.85 1/4/2023

Pedro Santabarbara, M.D., Ph.D.(7)

114,133 36,667 (6) 6.50 11/4/2020
23,568 23,568 (2) 7.93 1/6/2022
10,934 32,801 (3) 36.85 1/4/2023

(1) Vests in equal monthly installments on the last day of the month through December 31, 2014.
(2) Vests in equal monthly installments on the last day of the month through December 31, 2015.
(3) Vests in equal monthly installments on the last day of the month through December 31, 2016.
(4) Vests as to one quarter of the shares on July 23, 2013 and thereafter vests as to the remaining shares in equal monthly installments through July 23, 2016.
(5) Vests in equal monthly installments on the last day of the month through April 30, 2014.
(6) Vested as to one quarter of the shares on November 1, 2011 and thereafter vests as to the remaining shares in equal monthly installments through October 31, 2014.
(7) In connection with Dr. Santabarbara’s cessation of employment with the company in February 2014, the portion of any outstanding options which would have vested within one year following his departure immediately vested. The portion of any outstanding options that had vested as of his departure date are exercisable on or before May 15, 2014.

Option Exercises and Stock Vested Table

Option Awards Stock Awards

Name

Number of Shares
Acquired on
Exercise (#)
Value Realized
on Exercise ($)
Number of Shares
Acquired on
Vesting (#)
Value Realized
on Vesting ($)

Adelene Q. Perkins

— — — —

Pedro Santabarbara, M.D.

— — — —

Julian Adams, Ph.D.

— — — —

Lawrence E. Bloch

— — — —

Vito J. Palombella, Ph.D.

26,839 $ 443,819.48 — —

Potential Payments upon Termination or Change in Control

Our named executive officers are entitled to certain benefits under an Executive Severance Benefits Plan in the event their employment is terminated without cause or a by way of resignation for good reason, as described above under the heading “Compensation of Executive Officers—Compensation Discussion and Analysis—Components of our Compensation

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Program and Relationship to Performance—Severance Benefits.” The following table describes the potential payments and benefits to each of our named executive officers assuming a termination of employment without cause or by way of resignation for good reason on December 31, 2013. In addition to the amounts shown in the table below, each executive would receive payments for amounts of base salary and vacation time accrued through the date of termination and payment for any reimbursable business expenses incurred.

Name and Principal Position

Salary
($)
Cash Incentive
($)
Market Value of
Awards Vesting on
Termination
($)(1)
Healthcare Benefits
($)(2)
Other
($)(3)
Total ($)

Adelene Q. Perkins,

552,000 — 597,754 9,582 10,000 1,169,336

President and Chief Executive Officer(3)

Julian Adams, Ph.D.,

465,800 — 395,431 8,055 10,000 879,286

President of R&D

Lawrence E. Bloch, M.D., J.D.

378,800 — 0 9,582 10,000 398,382

Chief Financial Officer and Chief Business Officer

Vito J. Palombella, Ph.D

366,400 — 223,479 9,582 10,000 609,461

Chief Scientific Officer

Pedro Santabarbara, M.D., Ph.D.

398,100 — 337,326 2,434 10,000 747,860

Chief Medical Officer

(1) This amount is equal to (i) the number of options that would vest as a direct result of the employment termination multiplied by (ii) the excess of $13.81, which represents the fair market value of our common stock as of December 31, 2013, over the exercise price of the options.
(2) Represents the cost of continued COBRA benefits for the executive officer and any qualified beneficiary. COBRA benefits are payable until 12 months following termination of employment if the named executive officer elects COBRA coverage, and only for so long as such coverage continues in force.
(3) Represents the estimated cost of outplacement services for a period of six months.

Securities Authorized for Issuance under Equity Compensation Plans

The following table provides information about the securities authorized for issuance under our equity compensation plans as of December 31, 2013:

Equity Compensation Plan Information

Plan Category

Number of securities
to be issued
upon exercise  of
outstanding options,
warrants and rights(1)
Weighted-average
exercise price of
outstanding options,
warrants  and rights
Number of securities
remaining available for
future issuance under
equity compensation plans (excluding
securities reflected in column (a))
(a) (b) (c)

Equity compensation plans

approved by security holders

6,101,841 (2) $ 14.16 2,566,598 (3)

Equity compensation plans not approved by security holders

— — —

Total

6,101,841 $ 14.16 2,566,598

(1) This table excludes an aggregate of 69,110 shares of our common stock issuable upon exercise of outstanding options granted by our predecessor company and assumed by us in connection with the reverse merger with our predecessor company. The weighted average exercise price of the excluded options is $3.84.

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(2) Consists of (i) 6,014,208 shares of our common stock issuable under our 2010 Stock Incentive Plan and (ii) 87,633 shares of common stock issuable under our 2013 Employee Stock Purchase Plan (the “ESPP”) in connection with the offering period in effect as of December 31, 2013.
(3) Consists of (i) 2,436,134 shares of our common stock available for future issuance under our 2010 Stock Incentive Plan and (ii) 130,464 shares of our common stock available for future issuance under our ESPP.

Compensation Committee Interlocks and Insider Participation

During fiscal year 2013, the Compensation Committee consisted of Drs. Evnin and Lynch and Messers. Selby and Babler. The current members of the Compensation Committee of our board of directors are Messrs. Selby (Chair) and Berkowitz and Dr. Venuti. No member of the Compensation Committee was at any time during our 2013 fiscal year, or formerly, an officer or employee of ours or any subsidiary of ours, nor has any member of the Compensation Committee had any relationship with us requiring disclosure under Item 404 of Regulation S-K under the Exchange Act.

None of our executive officers has served as a director or member of the compensation committee (or other committee serving an equivalent function) of any entity that had one or more executive officers serving as a member of our board of directors or Compensation Committee.

Compensation Committee Report

The Compensation Committee has reviewed and discussed the Compensation Discussion and Analysis required by Item 402(b) of Regulation S-K with our management. Based on this review and discussion, the Compensation Committee recommended to our board of directors that the Compensation Discussion and Analysis be included in this proxy statement.

By the Compensation Committee of the Board of Directors,

Norman C. Selby (Chair)

Michael C. Venuti, Ph.D.

Jeffrey Berkowitz

PROPOSAL 2—ADVISORY VOTE ON THE COMPENSATION OF OUR NAMED EXECUTIVE OFFICERS

The Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, or the Dodd-Frank Act, enables our stockholders to vote to approve, on an advisory (non-binding) basis, a resolution on the compensation of our named executive officers as disclosed in this proxy statement in accordance with the SEC’s rules. We are asking our stockholders to provide advisory approval of the compensation of our named executive officers, which consist of our Chair, President and Chief Executive Officer, our President of Research and Development, our Chief Scientific Officer, our Chief Financial Officer and Chief Business Officer, and our Chief Medical Officer, as such compensation is described in the Compensation Discussion and Analysis section, the tabular disclosure regarding such compensation, and the accompanying narrative disclosure set forth in this proxy statement, beginning on page 27.

Our executive compensation program is designed to attract, motivate, and retain our executive officers, who are critical to our success. Our program both rewards strong performance and aligns incentives with the creation of stockholder value. Awards under our contingent cash compensation and merit stock option programs are formulaically tied to the achievement of corporate goals, and we use stock options as a compensation vehicle in order to preserve our cash resources and link compensation with stockholder return. Our board believes that this

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link between compensation and the achievement of both annual and long-term objectives has helped drive our performance over time, and does not encourage excessive risk-taking by our executive leadership team. In addition, consistent with our culture of citizen-ownership, each element of our compensation program is broadly available across our company, and our executive officers do not receive any material perquisites or other personal benefits.

As described more fully in the Compensation Discussion and Analysis section of this proxy statement, our contingent cash compensation program was not funded for 2013 and our merit stock option program was funded only for non-executive officers as a result of our adherence to our pre-established contingent compensation guidelines for 2013 and the application of our formulaic approach to linking contingent cash compensation and merit stock option awards to the achievement of corporate goals. 2014 base salaries for our named executive officers were determined following a review of individual named executive officer performance and market data provided by Radford, consultant to the Compensation Committee engaged in June 2013. No material modifications to our compensation programs were introduced in 2013 as we believe our executive compensation program continues to support our compensation philosophy.

We are submitting the following resolution for a vote by our stockholders at the annual meeting:

RESOLVED, that the stockholders of Infinity Pharmaceuticals, Inc. (“Infinity”) approve, on an advisory (non-binding) basis, the compensation paid to Infinity’s named executive officers, as such compensation is described in the Compensation Discussion and Analysis section, the Summary Compensation Table, and the related compensation tables, notes and narrative disclosure in the proxy statement for Infinity’s 2014 Annual Meeting of Stockholders.

As an advisory vote, this vote is not binding on our company, our board, or our Compensation Committee. However, our Compensation Committee and board of directors value the opinions to be expressed by our stockholders in their vote on this proposal and will consider the outcome of the vote when making future compensation decisions for our named executive officers.

Our board of directors recommends that you vote “FOR” approval of the compensation paid to the company’s named executive officers, as described in the Compensation Discussion and Analysis, the Summary Compensation Table and the related compensation tables, notes and narrative disclosure set forth in this proxy statement.

PROPOSAL 3—RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Our Audit Committee has appointed the firm of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2014. Although stockholder approval of the appointment of Ernst & Young LLP is not required by law, our board of directors believes that it is advisable to give stockholders an opportunity to ratify this appointment. If this proposal is not approved by our stockholders at the 2014 annual meeting, our Audit Committee will reconsider its appointment of Ernst & Young LLP.

Representatives of Ernst & Young LLP are expected to be present at the 2014 annual meeting. They will have the opportunity to make a statement if they desire to do so and will also be available to respond to appropriate questions from stockholders.

Our board of directors recommends that you vote FOR the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the 2014 fiscal year.

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OTHER MATTERS

Our board of directors is not aware of any other matters that are likely to be brought before the 2014 annual meeting. If other matters are properly brought before the 2014 annual meeting, including a proposal to adjourn the meeting to permit the solicitation of additional proxies in the event that one or more proposals have not been approved by a sufficient number of votes at the time of the meeting, the persons named in the enclosed proxy will vote on such matters in their own discretion.

We hope that you will attend the annual meeting. Whether or not you plan to attend, we urge you to vote your shares over the Internet or by telephone, or complete, date, sign and return the enclosed proxy card in the accompanying postage-prepaid envelope. A prompt response will greatly facilitate arrangements for the meeting, and your cooperation will be appreciated.

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INFINITY PHARMACEUTICALS, INC.

C/O AMERICAN STOCK TRANSFER, 6201 15TH AVE.

BROOKLYN, NY 11219

VOTE BY INTERNET – www.proxyvote.com

Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 P.M. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form.

ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS

If you would like to reduce the costs incurred by our company in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronically via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and, when prompted, indicate that you agree to receive or access proxy materials electronically in future years.

VOTE BY PHONE – 1-800-690-6903

Use any touch-tone telephone to transmit your voting instructions up until 11:59 P.M. Eastern Time the day before the cut-off date or meeting date. Have your proxy card in hand when you call and then follow the instructions.

VOTE BY MAIL

Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:

KEEP THIS PORTION FOR YOUR RECORDS

DETACH AND RETURN THIS PORTION ONLY

THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.

The Board of Directors recommends you vote FOR the following proposal(s):

1. Election of Directors

For Against Abstain

01     José Baselga, M.D., Ph.D.

¨ ¨ ¨

02     Jeffrey Berkowitz, J.D.

¨ ¨ ¨

03     Anthony B. Evnin, Ph.D.

¨ ¨ ¨

04     Gwen A. Fyfe, M.D.

¨ ¨ ¨

05     Eric S. Lander, Ph.D.

¨ ¨ ¨

06     Adelene Q. Perkins

¨ ¨ ¨

07     Norman C. Selby

¨ ¨ ¨

08     Ian F. Smith

¨ ¨ ¨

09     Michael C. Venuti, Ph.D.

¨ ¨ ¨
Please sign exactly as your name appears hereon. Joint owners should each sign personally. Trustees and other fiduciaries should indicate the capacity in which they sign. If a corporation or partnership, this signature should be that of an authorized officer who should state his or her title.
Signature [PLEASE SIGN WITHIN BOX] Date

The Board of Directors recommends you vote FOR the following proposals:

For Against Abstain
2. To approve on an advisory basis the executive compensation of our named executive officers. ¨ ¨ ¨
3. To ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the 2014 fiscal year. ¨ ¨ ¨
NOTE: Such other business as may properly come before the meeting or any adjournment thereof.

Signature (Joint Owners)

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LOGO

780 Memorial Drive

Cambridge, MA 02139

Tel: 617-453-1000

Fax: 617-453-1001

www.infi.com

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice & Proxy Statement and Annual Report are available at www.infi.com/proxy.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

INFINITY PHARMACEUTICALS, INC.

ANNUAL MEETING OF STOCKHOLDERS

June 17, 2014

Those signing on the reverse side, revoking any prior proxies, hereby appoint(s) Adelene Q. Perkins and Lawrence E. Bloch, or each of them, with full power of substitution, as proxies for those signing on the reverse side to act and vote at the 2014 Annual Meeting of Stockholders of Infinity Pharmaceuticals, Inc. and at any adjournments or postponements thereof as indicated upon all matters referred to on the reverse side and described in the Proxy Statement for the Annual Meeting, and, in their discretion, upon any other matters which may properly come before the Annual Meeting.

THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED AS DIRECTED BY THE UNDERSIGNED STOCKHOLDER. IF NO SUCH DIRECTIONS ARE MADE, THIS PROXY WILL BE VOTED FOR THE ELECTION OF EACH OF THE NOMINEES LISTED ON THE REVERSE SIDE FOR THE BOARD OF DIRECTORS, AND FOR PROPOSALS NUMBER 2 AND 3.

Please sign this proxy exactly as your name appears hereon. Joint owners should each sign personally. Trustees and other fiduciaries should indicate the capacity in which they sign. If a corporation or partnership, this signature should be that of an authorized officer who should state his or her title.

UNLESS SUBMITTING A PROXY FOR THESE SHARES OVER THE INTERNET OR BY TELEPHONE, PLEASE MARK, SIGN, DATE, AND RETURN THIS PROXY CARD PROMPTLY IN THE ENCLOSED REPLY ENVELOPE.

CONTINUED AND TO BE SIGNED ON THE REVERSE SIDE

The above information was disclosed in a filing to the SEC. To see this filing in its entirety, click here.

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