WESTFIELD CAPITAL MANAGEMENT CO LP

Most recent update: March 31, 2018

CompanyShares/WarrantsValue ($000)
Alphabet Holding Company, Inc.358,781371,062
Amazon.com226,570327,924
Apple Inc.1,911,372320,690
Facebook1,638,805261,865
Visa Inc.2,003,501239,659
Microsoft Corporation2,589,160236,313
American Housing Income Trust, Inc.2,565,657194,913
Jazz Pharmaceuticals plc1,203,405181,702
Constellation Brands Inc728,850166,119
Marriott International1,216,443165,412
Cooper Companies710,938162,670
Home Depot899,363160,302
New Ulm Telecom, Inc.1,654,326154,448
Boeing Company (The)465,141152,510
United States Cellular Corporation712,092152,388
ServiceNow908,000150,229
Salesforce.com Inc1,287,616149,750
Union Pacific Corporation1,087,131146,143
Progressive Corporation (The)2,362,109143,923
Adobe Systems Incorporated640,964138,500
Celgene Corporation1,475,259131,608
Vertex Pharmaceuticals Incorporated777,101126,652
Ingersoll-Rand plc (Ireland)1,433,234122,556
Envestnet1,109,779116,826
Andeavor1,148,183115,461
DowDuPont Inc.1,800,273114,695
Nektar Therapeutics1,013,932107,740
Abbott Laboratories1,756,838105,270
Philip Morris International Inc1,050,409104,411
Mettler-Toledo International181,072104,122
United Continental Holdings1,487,045103,305
Mastercard Incorporated582,641102,055
Cognizant Technology Solutions Corporation1,263,307101,696
The Medicines Company3,029,61199,795
CME Group Inc.610,72698,779
Celanese Corporation980,14998,221
MGM Growth Properties LLC2,783,87097,491
Illinois Tool Works Inc.618,20996,849
Stargaze Entertainment Group Inc.504,36096,363
CoStar Group262,74495,292
Lennox International462,50194,521
Bank of America Corporation3,144,78394,312
Worldpay1,143,34194,028
J.B. Hunt Transport Services788,73792,401
BROADVIEW INSTITUTE INC390,54892,033
Summit Materials2,959,31089,608
PayPal Holdings, Inc.1,171,08088,850
Teledyne Technologies Incorporated464,32386,907
Avery Dennison Corporation804,68985,498
Biogen Idec Inc.299,87982,113
Arthur J. Gallagher & Co.1,163,57379,972
Applied Materials1,420,50578,994
RSP Permian1,676,13978,577
International Business Machines Corporation509,16478,121
Delphi Automotive plc1,630,05677,672
Pinnacle Foods Inc1,426,48977,173
Aptiv PLC907,63777,122
Transdigm Group Incorporated249,84976,689
Fortinet1,329,07271,212
Redux Holdings, Inc.475,14871,039
Costco Wholesale Corporation375,71470,796
MSCI Inc463,77869,321
FleetCor Technologies338,23868,493
KLX Inc.959,27068,166
Splunk Inc.681,20767,024
Lamprell325,86266,202
Comerica Incorporated675,44164,795
IHS Markit1,339,17764,602
Total Energy Services Inc.746,44064,388
ICON plc535,75163,294
Bio-Rad Laboratories248,44462,131
Dollar Tree642,79061,001
Flow International Corporation1,405,64260,906
Alibaba Group Holding Limited330,15560,597
Essent Group1,409,27959,979
NICE-Systems Limited622,95458,514
Micron Technology1,119,16958,353
Berry Petroleum Company1,048,19357,451
Masimo Corporation652,95857,428
Western Alliance Bancorporation986,63657,333
Aramark1,419,36856,150
Valero Energy Corporation587,89354,539
Cantel Medical Corp.484,76054,007
ACCELERON PHARMA INC1,374,19853,731
Fidelity National Information Services552,36053,192
American Tower Corporation (REIT)357,15151,908
Vail Resorts232,14351,466
John Bean Technologies Corporation452,99151,369
E*TRADE Financial Corporation920,43551,001
Bank of the Carolinas CORP1,117,34050,146
Lions Gate Entertainment2,029,34448,867
Axalta Coating Systems Ltd.1,618,09548,850
TopBuild Corp622,89347,664
Univar Inc.1,710,24547,459
Six Flags Entertainment Corporation New740,76746,120
IDEXX Laboratories234,30744,844
REAL HIP-HOP NETWORK, INC857,91344,183
Pioneer Exploration, Inc.255,88043,955
Eldorado Resorts, Inc.1,326,21443,765
Zendesk, Inc.911,77043,646
LPL Financial Holdings Inc.709,38743,322
Nexstar Broadcasting Group641,63842,669
Proofpoint374,97042,615
Integrated Research Ltd.754,06641,730
Autodesk330,78041,539
Microchip Technology Incorporated451,16041,218
Alexandria Real Estate Equities327,05040,845
Crane Company413,88538,384
Quest Management Inc.380,64638,179
Burlington Stores Inc284,14637,834
Boyd Gaming Corporation1,182,54537,676
Installed Building Products621,75837,337
Zoetis437,56036,541
PVH Corp.239,37036,248
Tiffany & Co.369,64536,100
Milacron Holdings Corp.1,786,14535,973
Palo Alto Networks198,13935,966
Community Service Communications714,36535,725
New Resource Bank920,42535,372
Smith (A.O.) Corporation551,37535,062
Raymond James Financial391,55435,009
Analog Devices377,48534,400
Builders FirstSource1,685,96933,450
Rush Enterprises777,38633,031
Halfords Group Plc567,62532,860
Orion Engineered Carbons1,208,81532,759
W.T.B. Financial Corp.531,18532,524
Diamondback Energy256,30032,427
Madison Ventures Inc.131,76432,388
Blackham Resources Ltd.683,70532,203
Ryder System440,45032,060
The Ultimate Software Group131,20131,974
Vulcan Materials Company279,02931,857
NCR Corporation1,009,18331,809
Trinseo S.A.426,34531,571
NEW RELIC INC416,66630,883
East West Bancorp482,73530,190
Sun Communities330,10430,162
Rockwell Diamonds, Inc.172,82530,106
H. B. Fuller Company595,85529,632
CommScope Holding Company, Inc.733,92029,335
Tableau Software361,00529,176
Clovis Oncology550,31529,057
Pacific Premier Bancorp Inc719,73728,933
WNS (Holdings) Limited621,62528,178
Brinker International777,08028,053
Gartner238,15528,012
Coherent147,26327,597
Parametric Technology Corporation350,73127,361
Aeolus Pharmaceuticals, Inc.1,348,87526,883
Zayo Group Holdings, Inc.786,09426,853
Bright Horizons Family Solutions Inc267,72326,697
Alexion Pharmaceuticals239,08026,648
InterXion Holding N.V.420,65626,127
Pacira Pharmaceuticals834,28225,988
Watsco142,19525,733
Old Dominion Freight Line173,90325,559
Omnicell583,69925,333
Mercury Computer Systems520,13525,133
Texas Roadhouse426,72324,656
Expedition Mining Inc220,45424,340
CommVault Systems423,58724,229
Cypress Semiconductor Corporation1,352,74022,942
Integrated Drilling Equipment Holdings Corp.742,07522,678
MasTec480,29022,598
Sotheby's440,20022,587
CyrusOne431,83822,114
CIENA Corporation851,28622,048
Bottomline Technologies565,78221,924
NetApp353,65021,817
Dana Holding Corporation846,81621,814
AveXis, Inc.174,81021,603
Party City Holdings1,320,06020,593
Heico Corporation288,40020,462
Camden Property Trust238,20020,052
Wright Medical Group974,25119,329
MGIC Investment Corporation1,463,78019,029
Floor & Decor Holdings, Inc.364,51518,999
BMC Stock Holdings970,89218,981
QTS Realty Trust, Inc.504,74518,282
MKS Instruments155,11617,939
Industrial Logistics Properties Trust879,07517,880
Pinnacle Financial Partners273,54517,562
Lithia Motors174,14917,505
Stag Industrial713,16817,059
Chegg750,82515,512
Ultra Clean Holdings805,61615,508
Lumentum242,53115,473
Resolute Energy Corp.363,85512,608
Aclaris Therapeutics, Inc.710,36912,446
Monolithic Power Systems106,43412,322
NATIONAL MENTOR HOLDINGS, INC.365,73011,817
WPX Energy781,17011,546
Santander Holdings USA705,10011,493
Prothena Corp plc309,81911,373
Hamilton Lane INC272,46010,144
Novocure Ltd456,0359,942
Cardiome Pharma Corporation4,192,0349,726
Green Dot Corporation149,1909,572
8x8 Inc509,0209,493
Eli Lilly and Company109,1708,446
Universal Display Corp80,3928,120
Texas Instruments Incorporated76,8307,982
Orbotech Ltd.128,0947,965
J P Morgan Chase & Co67,8907,466
Wal-Mart Stores82,8657,372
CITIZENS FINANCIAL GROUP INC/RI157,8206,625
ConAgra Foods179,0856,605
Occidental Petroleum Corporation97,2156,315
Royal Caribbean Cruises Ltd.52,6556,200
Thermo Fisher Scientific Inc29,9236,178
Jack Henry & Associates50,4196,098
Financial Engines157,5805,515
Verizon Communications Inc.111,6545,339
Johnson & Johnson40,8795,239
Cummins Inc.32,3005,236
Honeywell International Inc.32,9354,759
Caterpillar30,9204,557
Lockheed Martin Corporation13,4584,548
Archer98,2604,262
Neenah Paper24,8704,062
Danaher Corporation41,4354,057
Carnival Plc ADS60,3603,958
Marten Transport98,1662,238
Microsemi Corporation33,0302,138
Live Nation Entertainment47,3501,995
Waste Connections13,686982
Crimson Wine Group Ltd.15,000836
Lions Gate Metals Inc.27,795718
Alliance Creative Group, Inc.3,350713
Merck & Company12,159662
Kresta Holdings Ltd.8,900537
Streamtrack, Inc.3,100530
Activision Blizzard7,000472
Zynga Inc.128,700471
TANDEM DIABETES CARE INC76,300378
Hill-Rom Holdings Inc3,900339
Schlumberger N.V.4,824312
NVR90252
Ventas4,719234
Novagold Resources Inc.53,000229
Salem Communications Corporation50,600182
Arcos Dorados Holdings Inc.10,37095
AU Optronics Corp16,90077

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