WESTFIELD CAPITAL MANAGEMENT CO LP

Most recent update: June 30, 2018

CompanyShares/WarrantsValue ($000)
Alphabet Holding Company, Inc.373,845419,323
Amazon.com220,085374,100
Apple Inc.1,847,154341,927
Facebook1,588,025308,585
Visa Inc.1,922,214254,597
Microsoft Corporation2,532,793249,759
Cooper Companies840,266197,841
Andeavor1,503,753197,262
Mettler-Toledo International337,748195,431
Home Depot937,188182,845
American Housing Income Trust, Inc.2,437,522175,892
United States Cellular Corporation706,845173,417
Salesforce.com Inc1,252,984170,907
Boeing Company (The)508,268170,529
Union Pacific Corporation1,191,822168,857
Jazz Pharmaceuticals plc883,961152,306
Vertex Pharmaceuticals Incorporated871,856148,181
ServiceNow854,747147,418
Constellation Brands Inc667,635146,125
Adobe Systems Incorporated522,685127,436
The Medicines Company3,281,183120,419
DowDuPont Inc.1,807,306119,138
J.B. Hunt Transport Services976,462118,689
Teledyne Technologies Incorporated595,388118,518
Costco Wholesale Corporation566,738118,437
Ingersoll-Rand plc (Ireland)1,317,473118,217
Progressive Corporation (The)1,963,655116,150
Marriott International904,893114,559
Envestnet897,729111,704
Celgene Corporation1,405,143111,596
Mastercard Incorporated565,668111,165
Illinois Tool Works Inc.778,614107,869
Celanese Corporation957,599106,351
Broadcom Corporation433,079105,082
United Continental Holdings1,456,228101,543
Stargaze Entertainment Group Inc.490,776100,064
Thermo Fisher Scientific Inc481,46099,730
Pinnacle Foods Inc1,517,93198,757
CME Group Inc.595,17497,561
Worldpay1,189,84797,306
PayPal Holdings, Inc.1,137,14594,690
Comerica Incorporated1,018,32592,586
Total Energy Services Inc.1,083,33391,563
Lennox International454,03990,876
Avery Dennison Corporation857,82287,584
Aptiv PLC940,90886,215
Arthur J. Gallagher & Co.1,312,96085,710
Transdigm Group Incorporated245,64984,783
Pioneer Exploration, Inc.438,12082,910
Biogen Idec Inc.272,18478,999
ICON plc592,61578,539
Quest Management Inc.712,93378,380
Cognizant Technology Solutions Corporation970,21076,637
Six Flags Entertainment Corporation New1,083,54975,903
Bio-Rad Laboratories261,56275,471
Applied Materials1,633,14475,435
Fortinet1,185,48574,010
Delphi Energy1,623,62873,810
International Business Machines Corporation497,76169,537
LPL Financial Holdings Inc.1,060,73569,521
Bristol-Myers Squibb Company1,238,22768,523
New Ulm Telecom, Inc.637,78866,974
CoStar Group157,61765,038
Walt Disney Company (The)608,96063,825
NICE-Systems Limited615,04963,824
Fidelity National Information Services598,21063,428
Redux Holdings, Inc.471,22263,318
Summit Materials2,406,45963,170
Lamprell363,99062,916
Nexstar Broadcasting Group848,98862,316
Carnival Plc ADS1,076,34961,686
Flow International Corporation1,473,92159,546
Madison Ventures Inc.190,65059,138
Masimo Corporation605,38759,116
Western Alliance Bancorporation1,038,99958,818
IHS Markit1,137,54058,686
WPX Energy3,241,68058,447
Alibaba Group Holding Limited307,51157,053
Splunk Inc.564,14055,912
FleetCor Technologies264,85555,792
Axalta Coating Systems Ltd.1,767,60553,576
SERVICEMASTER GLOBAL HOLDINGS INC891,75553,033
Analog Devices548,86952,648
NCR Corporation1,744,15852,290
Cantel Medical Corp.527,44151,879
Lions Gate Entertainment2,188,85351,350
Bank of the Carolinas CORP1,096,14050,116
Blackham Resources Ltd.930,68649,838
Micron Technology942,42349,421
Aramark1,311,74748,666
Tiffany & Co.367,83748,407
Desert Gold Ventures Inc.655,02046,244
REAL HIP-HOP NETWORK, INC830,49545,760
Diamondback Energy345,65745,478
Microchip Technology Incorporated497,80545,275
E*TRADE Financial Corporation732,72544,813
Univar Inc.1,655,98343,453
Hilton Worldwide Holdings Inc.543,94243,058
Catalent, Inc.1,016,91442,599
Integrated Research Ltd.647,60141,712
IDEXX Laboratories191,37341,708
Burlington Stores Inc274,64041,342
Alexandria Real Estate Equities326,11041,145
CommVault Systems615,98440,563
Vail Resorts145,11039,788
Boyd Gaming Corporation1,143,56039,636
Raymond James Financial443,57939,634
Eldorado Resorts, Inc.1,004,25939,267
MasTec770,66939,111
ACCELERON PHARMA INC795,04338,575
W.T.B. Financial Corp.513,46337,642
Autodesk286,80137,597
Crane Company467,93237,495
NetApp475,03137,304
Zoetis434,70537,033
PVH Corp.246,78436,949
Gartner277,30636,854
Clovis Oncology802,06836,470
Community Service Communications697,02736,224
Orion Engineered Carbons1,171,91336,154
Palo Alto Networks175,28936,017
Halfords Group Plc552,16735,946
Vulcan Materials Company277,41435,803
Sun Communities364,59835,687
The Ultimate Software Group138,50635,639
Rush Enterprises817,58635,467
Nektar Therapeutics721,05635,209
Berry Petroleum Company764,81635,136
QTS Realty Trust, Inc.873,74434,513
Envestra Ltd.614,70033,778
Integrated Drilling Equipment Holdings Corp.1,044,46533,298
MSCI Inc201,00033,251
Builders FirstSource1,811,06033,124
Proofpoint283,86532,732
Zendesk, Inc.600,02332,695
ON Semiconductor Corporation1,432,66031,855
Parametric Technology Corporation339,17831,818
MSA Safety325,37031,346
Ryder System428,99030,827
East West Petroleum Corp.468,02630,515
Dollar Tree353,50830,048
Stag Industrial1,099,14729,930
Essent Group833,38929,852
InterXion Holding N.V.477,44129,802
Tableau Software302,86029,605
Ingevity Corp365,11529,523
Alexion Pharmaceuticals236,58529,372
Trinseo S.A.412,93029,297
Rockwell Diamonds, Inc.171,92328,579
Bright Horizons Family Solutions Inc276,97828,396
Ascendis Pharma424,57528,243
Centennial Resource Development1,520,72027,464
Ironwood Gold Corp.1,392,23126,619
Aeolus Pharmaceuticals, Inc.1,144,57026,611
Heico Corporation433,26326,407
Expedition Mining Inc219,06926,330
Texas Roadhouse399,01826,140
H. B. Fuller Company485,04026,037
RSP Permian579,09025,492
CyrusOne432,53825,243
Dave & Buster's Entertainment525,34525,006
Floor & Decor Holdings, Inc.504,19124,872
Wright Medical Group942,98124,480
KLX Inc.336,17924,171
CommScope Holding Company, Inc.809,77723,650
Party City Holdings1,547,61023,601
Milacron Holdings Corp.1,245,69223,581
Guidewire Software261,52323,218
NEW RELIC INC228,11422,946
Santander Holdings USA1,196,82022,847
Old Dominion Freight Line152,70222,746
Omnicell433,24922,724
Adventure Gold, Inc.390,87322,706
Alnylam Pharmaceuticals228,14022,470
Scientific Games Corp452,68022,249
Camden Property Trust237,49521,643
SVB Financial Group74,69421,569
Watsco115,28520,553
WNS (Holdings) Limited393,60020,538
Pacific Premier Bancorp Inc532,35220,309
CIENA Corporation751,66119,927
Bottomline Technologies397,35219,800
Kemper Corporation259,32719,618
Green Dot Corporation250,58818,391
Neurocrine Biosciences184,74118,149
NATIONAL MENTOR HOLDINGS, INC.489,39517,897
Intersect ENT, Inc.461,53217,284
Novocure Ltd509,61015,951
Monolithic Power Systems115,69015,464
Aclaris Therapeutics, Inc.750,60414,990
Ultra Clean Holdings890,28314,779
Lumentum234,37813,570
Blueprint Medicines Corp212,98013,520
Apellis Pharmaceuticals, Inc.606,95613,353
Acacia Communications, Inc.381,76513,289
FIBROGEN INC211,66513,250
Hamilton Lane INC270,91812,996
CymaBay Therapeutics915,22012,282
MGP Ingredients136,51012,123
New Resource Bank246,31510,840
FATE THERAPEUTICS INC805,4609,134
Abbott Laboratories142,4308,687
Wal-Mart Stores100,6908,624
Texas Instruments Incorporated77,6608,562
HFF245,2168,423
Occidental Petroleum Corporation98,1958,217
ConAgra Foods222,6757,956
J P Morgan Chase & Co68,8307,172
Verizon Communications Inc.140,1607,051
Jack Henry & Associates50,9496,642
CITIZENS FINANCIAL GROUP INC/RI160,0706,227
Suncor Energy Inc.148,8056,053
Caterpillar41,9405,690
Royal Caribbean Cruises Ltd.53,4155,534
Delta Air Lines Inc. (New)109,0955,405
Neenah Paper31,4905,260
Andeavor Logistics123,2755,243
Archer99,7304,571
Danaher Corporation38,2923,779
Bank of America Corporation99,4102,802
Marten Transport98,1662,302
Live Nation Entertainment47,3502,300
Waste Connections13,6861,030
Crimson Wine Group Ltd.15,000957
Philip Morris International Inc11,100896
Alliance Creative Group, Inc.3,350781
Merck & Company12,159738
Lions Gate Metals Inc.27,795690
Kresta Holdings Ltd.8,900543
Streamtrack, Inc.3,100512
PagSeguro Digital Ltd.15,400427
Takeuchi Manufacturing Co., Ltd.3,100367
West Pharmaceutical Services3,700367
Netflix938367
Monarch Casino & Resort7,600335
Schlumberger N.V.4,824323
Ventas4,719269
Salem Communications Corporation50,600261

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