0001085146-17-001754.txt : 20170811 0001085146-17-001754.hdr.sgml : 20170811 20170811075237 ACCESSION NUMBER: 0001085146-17-001754 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20170630 FILED AS OF DATE: 20170811 DATE AS OF CHANGE: 20170811 EFFECTIVENESS DATE: 20170811 FILER: COMPANY DATA: COMPANY CONFORMED NAME: WESTFIELD CAPITAL MANAGEMENT CO LP CENTRAL INDEX KEY: 0001177719 IRS NUMBER: 800175963 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-10220 FILM NUMBER: 171022988 BUSINESS ADDRESS: STREET 1: ONE FINANCIAL CENTER STREET 2: 23RD FLOOR CITY: BOSTON STATE: MA ZIP: 02111 BUSINESS PHONE: 6174287100 MAIL ADDRESS: STREET 1: ONE FINANCIAL CENTER STREET 2: 23RD FLOOR CITY: BOSTON STATE: MA ZIP: 02111 FORMER COMPANY: FORMER CONFORMED NAME: WESTFIELD CAPITAL MANAGEMENT CO LLC DATE OF NAME CHANGE: 20020717 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001177719 XXXXXXXX 06-30-2017 06-30-2017 WESTFIELD CAPITAL MANAGEMENT CO LP
ONE FINANCIAL CENTER 23RD FLOOR BOSTON MA 02111
13F HOLDINGS REPORT 028-10220 N
Brandi McMahon Compliance Officer 617 428-7100 /s/ Brandi McMahon Boston MA 08-11-2017 0 249 11732060 false
INFORMATION TABLE 2 form13fInfoTable.xml DESCRIPTION FOR INFORMATION TABLE ABBOTT LABSCOM0028241001229442529199SHSOLE 21444210384778ACCELERON PHARMA INCCOM00434H108511271682359SHSOLE 11276290554730ACLARIS THERAPEUTICS INCCOM00461U105338801249254SHSOLE 8472520402002ACUSHNET HOLDINGS CORPCOM005098108224611132095SHSOLE 6404150491680ADOBE SYS INCCOM00724F10196704683707SHSOLE 5827020101005ALEXANDRIA REAL ESTATE EQ INCOM01527110983357691934SHSOLE 5900040101930ALEXION PHARMACEUTICALS INCCOM01535110940306331270SHSOLE 271044060226ALKERMES PLCSHSG0176710515234262795SHSOLE 201090061705ALLIANCE DATA SYSTEMS CORPCOM01858110856256219160SHSOLE 21645002710ALPHABET INCCAP STK CL C02079K107167922184788SHSOLE 161615023173ALPHABET INCCAP STK CL A02079K305160357172486SHSOLE 149456023030AMAZON COM INCCOM023135106200488207116SHSOLE 180580026536AMERICAN CAMPUS CMNTYS INCCOM02483510018436389765SHSOLE 38302506740AMETEK INC NEWCOM0311001001573802598320SHSOLE 23246170273703APPLE INCCOM0378331003109172158847SHSOLE 18798380279009APPLIED MATLS INCCOM038222105593801437420SHSOLE 11756650261755ARCOS DORADOS HOLDINGS INCSHS CLASS -A -G0457F1077710370SHSOLE 0010370AU OPTRONICS CORPSPONSORED ADR0022551077716900SHSOLE 0016900AUTODESK INCCOM05276910625860256499SHSOLE 25203904460AVERY DENNISON CORPCOM05361110966436751791SHSOLE 6177860134005AXALTA COATING SYS LTDCOMG0750C108481981504315SHSOLE 11518750352440BAIDU INCSPON ADR REP A0567521082861600SHSOLE 160000BANK OF NT BUTTERFIELD&SON LSHS NEWG0772R208381021117360SHSOLE 7009400416420BERRY GLOBAL GROUP INCCOM08579W103650711141394SHSOLE 7670390374355BIOGEN INCCOM09062X10387019320679SHSOLE 282246038433BIOMARIN PHARMACEUTICAL INCCOM09061G10110136111610SHSOLE 10967501935BIOVERATIV INCCOM09075E10018792312320SHSOLE 239730072590BLACK KNIGHT FINL SVCS INCCL A09214X1004430108190SHSOLE 82640025550BMC STK HLDGS INCCOM05591B109375391718041SHSOLE 9700000748041BOOZ ALLEN HAMILTON HLDG CORCL A0995021064610141670SHSOLE 78790062880BOYD GAMING CORPCOM103304101269731087200SHSOLE 8270900260110BRIGHT HORIZONS FAM SOL IN DCOM10919410042346548446SHSOLE 3292760219170BROADCOM LTDSHSY0982710971856308328SHSOLE 251739056589BROADSOFT INCCOM11133B40917038395776SHSOLE 2417770153999BRUNSWICK CORPCOM11704310924906397035SHSOLE 2203160176719BUILDERS FIRSTSOURCE INCCOM12008R107410612680194SHSOLE 20520450628149CARDIOME PHARMA CORPCOM NO PAR14159U301238945286340SHSOLE 293519502351145CAVIUM INCCOM14964U10846260744560SHSOLE 5534150191145CELANESE CORP DELCOM SER A15087010386203907976SHSOLE 7899760118000CELGENE CORPCOM1510201041707561314826SHSOLE 11535720161254CHARTER COMMUNICATIONS INC NCL A16119P108109938326370SHSOLE 283349043021CHEGG INCCOM16309210910373844050SHSOLE 4768500367200CHUBB LIMITEDCOMH1467J104220115140SHSOLE 1314002000CIENA CORPCOM NEW171779309534202135095SHSOLE 15798550555240CISCO SYS INCCOM17275R1026448206020SHSOLE 113605092415CLOROX CO DELCOM189054109489936770SHSOLE 20450016320CLOVIS ONCOLOGY INCCOM18946410029509315170SHSOLE 230360084810CME GROUP INCCOM12572Q1051130790280SHSOLE 60915029365COGNIZANT TECHNOLOGY SOLUTIOCL A19244610257636868016SHSOLE 7102860157730COLUMBIA PPTY TR INCCOM NEW198287203232251037765SHSOLE 5793650458400COMCAST CORP NEWCL A20030N101349489770SHSOLE 8977000COMMUNITY HEALTHCARE TR INCCOM20369C10611984468307SHSOLE 2604250207882COMMVAULT SYSTEMS INCCOM20416610227190481669SHSOLE 2722680209401CONSTELLATION BRANDS INCCL A21036P108149744772954SHSOLE 685605087349CONTRAFECT CORPCOM212326102217149600SHSOLE 14960000COOPER COS INCCOM NEW216648402103161430879SHSOLE 371518059361COSTAR GROUP INCCOM22160N10979912303156SHSOLE 205657097499CRANE COCOM22439910537396471095SHSOLE 3607450110350CROWN CASTLE INTL CORP NEWCOM22822V10126603265551SHSOLE 233310032241CSX CORPCOM12640810381815000SHSOLE 1500000CYBERARK SOFTWARE LTDSHSM2682V10831596632560SHSOLE 5072750125285CYRUSONE INCCOM23283R100646741160063SHSOLE 9605930199470DANA INCORPORATEDCOM235825205302351353996SHSOLE 10368860317110DANAHER CORP DELCOM235851102943771118349SHSOLE 9617440156605DELPHI AUTOMOTIVE PLCSHSG278231061103361258826SHSOLE 10713960187430DELTA AIR LINES INC DELCOM NEW2473617025492102205SHSOLE 57075045130DEXCOM INCCOM25213110766760912650SHSOLE 6074000305250DISNEY WALT COCOM DISNEY2546871061239581166661SHSOLE 10178430148818DOLLAR TREE INCCOM25674610810740153610SHSOLE 15148002130DOW CHEM COCOM2605431031286522039836SHSOLE 17547980285038DUNKIN BRANDS GROUP INCCOM26550410048465879264SHSOLE 7448640134400EAST WEST BANCORP INCCOM27579R10433021563695SHSOLE 4415050122190ELDORADO RESORTS INCCOM28470R102429562147812SHSOLE 12384020909410ELECTRONICS FOR IMAGING INCCOM28608210227269575545SHSOLE 3361250239420ENVISION HEALTHCARE CORPCOM29414D10045892732285SHSOLE 6251950107090ERICSSONADR B SEK 10294821608153312138282SHSOLE 2100802037480ESSENT GROUP LTDCOMG3198U10236326978095SHSOLE 7487850229310EURONET WORLDWIDE INCCOM29873610913553155124SHSOLE 87759067365EXPEDIA INC DELCOM NEW30212P30320425137125SHSOLE 13464002485FACEBOOK INCCL A30303M1022271591504566SHSOLE 12974530207113FCB FINL HLDGS INCCL A30255G10332252675440SHSOLE 4298260245614FIDELITY NATL INFORMATION SVCOM31620M10625099293900SHSOLE 28873005170FIRST REP BK SAN FRANCISCO CCOM33616C10019981199610SHSOLE 19615003460FLEETCOR TECHNOLOGIES INCCOM33904110515564107925SHSOLE 10604501880FLOWSERVE CORPCOM34354P10546272996599SHSOLE 7090690287530FORTINET INCCOM34959E109564091506653SHSOLE 10373260469327FULLER H B COCOM35969410610338202267SHSOLE 114285087982GALLAGHER ARTHUR J & COCOM363576109605621057858SHSOLE 8704680187390GARTNER INCCOM36665110732437262630SHSOLE 203920058710GENERAL ELECTRIC COCOM36960410336613538SHSOLE 1138012400GRACE W R & CO DEL NEWCOM38388F10838110529235SHSOLE 4087050120530GRUBHUB INCCOM4001101022535800SHSOLE 580000HAIN CELESTIAL GROUP INCCOM40521710019398499686SHSOLE 3824660117220HENRY JACK & ASSOC INCCOM426281101928889419SHSOLE 49437039982HEXCEL CORP NEWCOM42829110817267327094SHSOLE 1850040142090HILL ROM HLDGS INCCOM43147510268123855705SHSOLE 843965011740HOME DEPOT INCCOM437076102133780872101SHSOLE 7516660120435HONEYWELL INTL INCCOM438516106381328610SHSOLE 15990012620HUDSON TECHNOLOGIES INCCOM44414410933840000SHSOLE 4000000HUNT J B TRANS SVCS INCCOM44565810760242659243SHSOLE 566688092555ICON PLCSHSG4705A10075755774673SHSOLE 5657040208969IHS MARKIT LTDSHSG47567105550101249090SHSOLE 10582460190844INGERSOLL-RAND PLCSHSG477911011009291104382SHSOLE 9319640172418INPHI CORPCOM45772F10711897346860SHSOLE 266340080520INSTALLED BLDG PRODS INCCOM45780R101663141252398SHSOLE 9061360346262INTEGRA LIFESCIENCES HLDGS CCOM NEW45798520843320794716SHSOLE 4596060335110INTEGRATED DEVICE TECHNOLOGYCOM458118106270261047910SHSOLE 6137400434170INTEL CORPCOM4581401005322157737SHSOLE 88267069470INTERCONTINENTAL EXCHANGE INCOM45866F104972461475206SHSOLE 12494630225743INTERNATIONAL BUSINESS MACHSCOM4592001013082000SHSOLE 200000INTERPUBLIC GROUP COS INCCOM4606901005165209945SHSOLE 117365092580INTERXION HOLDING N.VSHSN4727910935937785001SHSOLE 4734810311520IPG PHOTONICS CORPCOM44980X1091293989170SHSOLE 68445020725JAZZ PHARMACEUTICALS PLCSHS USDG508711052057681323264SHSOLE 11445460178718JOHN BEAN TECHNOLOGIES CORPCOM47783910451936529963SHSOLE 2995930230370KAPSTONE PAPER & PACKAGING CCOM48562P10314866720600SHSOLE 4071600313440KELLOGG COCOM48783610818852271403SHSOLE 26666304740KIMBERLY CLARK CORPCOM494368103527140827SHSOLE 22396018431KKR REAL ESTATE FIN TR INCCOM48251K1004312200565SHSOLE 112025088540KLX INCCOM482539103546211092420SHSOLE 7199180372502LAM RESEARCH CORPCOM51280710821909154911SHSOLE 15220102710LENNOX INTL INCCOM52610710781563444147SHSOLE 379540064607LIBERTY BROADBAND CORPCOM SER A53030710726708311320SHSOLE 30584005480LILLY ELI & COCOM5324571081093091328180SHSOLE 11186150209565LIONS GATE ENTMNT CORPCL A VTG53591940178427795SHSOLE 2779500LIONS GATE ENTMNT CORPCL B NON VTG535919500807493072629SHSOLE 22087520863877LITHIA MTRS INCCL A536797103872692601SHSOLE 52421040180LIVE NATION ENTERTAINMENT INCOM53803410925296725855SHSOLE 5668250159030LOCKHEED MARTIN CORPCOM539830109380813718SHSOLE 1371800LUMENTUM HLDGS INCCOM55024U10910942191805SHSOLE 147135044670MACQUARIE INFRASTRUCTURE CORCOM55608B10540261513533SHSOLE 464023049510MADISON SQUARE GARDEN CO NEWCL A55825T10330046152596SHSOLE 86396066200MARKETAXESS HLDGS INCCOM57060D1081606679889SHSOLE 48029031860MARRIOTT INTL INC NEWCL A5719032021518371513680SHSOLE 13123890201291MARTEN TRANS LTDCOM573075108162059140SHSOLE 5914000MASIMO CORPCOM57479510021161232084SHSOLE 1312420100842MASTEC INCCOM57632310912074267415SHSOLE 205045062370MASTERCARD INCORPORATEDCL A57636Q10471767590921SHSOLE 4833110107610MATSON INCCOM57686G10513716456598SHSOLE 2688480187750MAXIM INTEGRATED PRODS INCCOM57772K10118299407542SHSOLE 40044207100MCDONALDS CORPCOM580135101102317668037SHSOLE 5648800103157MEDICINES COCOM584688105772122031359SHSOLE 15940690437290MERCK & CO INCCOM58933Y10577912159SHSOLE 1046801691METTLER TOLEDO INTERNATIONALCOM592688105110907188444SHSOLE 172570015874MGIC INVT CORP WISCOM552848103474734238647SHSOLE 310922701129420MGM RESORTS INTERNATIONALCOM55295310124753791070SHSOLE 777080013990MICROCHIP TECHNOLOGY INCCOM595017104436856595SHSOLE 31435025160MICRON TECHNOLOGY INCCOM595112103430851442916SHSOLE 11807460262170MICROSEMI CORPCOM595137100798811706865SHSOLE 12961850410680MICROSOFT CORPCOM5949181041950152829175SHSOLE 23974170431758MIDDLEBY CORPCOM59627810162745516380SHSOLE 444560071820MILACRON HLDGS CORPCOM59870L106185311053495SHSOLE 5947050458790MONOLITHIC PWR SYS INCCOM60983910525053259887SHSOLE 1472980112589MONSTER BEVERAGE CORP NEWCOM61174X109504521015540SHSOLE 8310550184485MOTOROLA SOLUTIONS INCCOM NEW620076307536761870SHSOLE 34420027450MSCI INCCOM55354G10052823512894SHSOLE 443119069775NATIONAL STORAGE AFFILIATESCOM SHS BEN IN6378701067615329528SHSOLE 1820230147505NATURAL GROCERS BY VITAMIN CCOM63888U1086323764614SHSOLE 4764170288197NCR CORP NEWCOM62886E10827823681268SHSOLE 5223780158890NEKTAR THERAPEUTICSCOM640268108737813773983SHSOLE 270429001069693NEUROCRINE BIOSCIENCES INCCOM64125C109644271400585SHSOLE 9968620403723NEVRO CORPCOM64157F10318916254140SHSOLE 1436200110520NEWELL BRANDS INCCOM6512291061468032737839SHSOLE 24375710300268NEXSTAR MEDIA GROUP INCCL A65336K10346452776783SHSOLE 5252390251544NICE LTDSPONSORED ADR65365610848899621182SHSOLE 4990970122085O REILLY AUTOMOTIVE INC NEWCOM67103H10722407102435SHSOLE 10064201793OCCIDENTAL PETE CORP DELCOM674599105585097710SHSOLE 54730042980OLD DOMINION FGHT LINES INCCOM67958010035595373742SHSOLE 286182087560OMNICELL INCCOM68213N10941352959432SHSOLE 5428280416604ON SEMICONDUCTOR CORPCOM682189105290412068434SHSOLE 15835740484860ORBCOMM INCCOM68555P100118981052900SHSOLE 5950700457830ORBOTECH LTDORDM7525310016224497377SHSOLE 2772420220135PACIFIC PREMIER BANCORPCOM69478X10519680533335SHSOLE 3016040231731PACIRA PHARMACEUTICALS INCCOM695127100582581221340SHSOLE 8222760399064PALO ALTO NETWORKS INCCOM6974351051160986754SHSOLE 8523401520PAYCHEX INCCOM704326107480384345SHSOLE 46905037440PAYPAL HLDGS INCCOM70450Y103853731590698SHSOLE 13794160211282PHILIP MORRIS INTL INCCOM718172109103039877301SHSOLE 7764240100877PINNACLE FOODS INC DELCOM72348P104697571174363SHSOLE 9898230184540PRA HEALTH SCIENCES INCCOM69354M1085186900SHSOLE 690000PRICELINE GRP INCCOM NEW7415034037154738250SHSOLE 3170006550PROGRESSIVE CORP OHIOCOM743315103766871739335SHSOLE 14491400290195PROOFPOINT INCCOM74342410334617398680SHSOLE 2321610166519PROTHENA CORP PLCSHSG7280010837027684160SHSOLE 4730700211090PTC INCCOM69370C10031603573351SHSOLE 4388910134460PVH CORPCOM69365610025474222481SHSOLE 21946603015QTS RLTY TR INCCOM CL A74736A10319971381633SHSOLE 2129730168660QUEST DIAGNOSTICS INCCOM74834L10040563364909SHSOLE 267309097600RAYMOND JAMES FINANCIAL INCCOM75473010952204650759SHSOLE 5453840105375REALPAGE INCCOM75606N10928953805363SHSOLE 6167930188570RED HAT INCCOM75657710261416641422SHSOLE 63352207900RENT A CTR INC NEWCOM76009N10032627800SHSOLE 2780000RUSH ENTERPRISES INCCL A78184620926868722639SHSOLE 4231600299479RYDER SYS INCCOM78354910860809844807SHSOLE 6188970225910S&P GLOBAL INCCOM78409V10453033363265SHSOLE 297191066074SALESFORCE COM INCCOM79466L3021240941432955SHSOLE 12357330197222SBA COMMUNICATIONS CORP NEWCL A78410G10453953399951SHSOLE 327884072067SCHLUMBERGER LTDCOM8068571083184824SHSOLE 482400SCHWAB CHARLES CORP NEWCOM808513105979472279960SHSOLE 19724000307560SCRIPPS NETWORKS INTERACT INCL A COM81106510151808758420SHSOLE 6530250105395SERVICENOW INCCOM81762P1021110031047200SHSOLE 9406560106544SIGNATURE BK NEW YORK N YCOM82669G10425310176338SHSOLE 135198041140SIX FLAGS ENTMT CORP NEWCOM83001A102921941546615SHSOLE 12819460264669SKYWORKS SOLUTIONS INCCOM83088M10213215137725SHSOLE 13532502400SMITH A OCOM83186520935398628404SHSOLE 4810840147320SONIC CORPCOM835451105279841056390SHSOLE 5974200458970SOTHEBYSCOM83589810727249507720SHSOLE 3888000118920SPIRIT AIRLS INCCOM84857710225632496256SHSOLE 2801260216130SPLUNK INCCOM84863710437515659427SHSOLE 564637094790STAG INDL INCCOM85254J10219731714886SHSOLE 5615560153330STATE STR CORPCOM8574771033453840SHSOLE 003840STERIS PLCSHS USDG847201041822632236352SHSOLE 18891360347216SUMMIT MATLS INCCL A86614U100863062989486SHSOLE 21756150813871SUN CMNTYS INCCOM86667410439935455414SHSOLE 3485740106840TABLEAU SOFTWARE INCCL A87336U10526819437721SHSOLE 2560910181630TESARO INCCOM881569107792256641SHSOLE 30491026150TESORO CORPCOM881609101985921053329SHSOLE 9284290124900THERMO FISHER SCIENTIFIC INCCOM883556102526230161SHSOLE 2601504146TOPBUILD CORPCOM89055F10317832336005SHSOLE 257785078220TOTAL SYS SVCS INCCOM89190610948888839285SHSOLE 6556150183670TRANSDIGM GROUP INCCOM89364110092389343619SHSOLE 308011035608TRANSUNIONCOM89400J107745701721762SHSOLE 14712820250480TRIPADVISOR INCCOM8969452012526600SHSOLE 660000TWENTY FIRST CENTY FOX INCCL A90130A101689502432956SHSOLE 21101960322760TWILIO INCCL A90138F10237612900SHSOLE 1290000ULTIMATE SOFTWARE GROUP INCCOM90385D10726402125689SHSOLE 75548050141UNION PAC CORPCOM90781810874562684617SHSOLE 5479260136691UNITED CONTL HLDGS INCCOM9100471091022251358476SHSOLE 12063170152159UNITEDHEALTH GROUP INCCOM91324P102131690710226SHSOLE 5813400128886UNITI GROUP INCCOM91325V10813896552760SHSOLE 3125800240180UNIVAR INCCOM91336L10727662947339SHSOLE 5358790411460VAIL RESORTS INCCOM91879Q10996645476482SHSOLE 3583730118109VALERO ENERGY CORP NEWCOM91913Y10039080579303SHSOLE 4739730105330VANTIV INCCL A92210H10541974662670SHSOLE 65378008890VENTAS INCCOM92276F1003284719SHSOLE 471900VERIZON COMMUNICATIONS INCCOM92343V104128028660SHSOLE 2866000VIACOM INC NEWCL B92553P20115574463920SHSOLE 45433009590VISA INCCOM CL A92826C8391624881732648SHSOLE 15059230226725VULCAN MATLS COCOM92916010927936220522SHSOLE 21700703515WAGEWORKS INCCOM93042710922067328380SHSOLE 1853250143055WASTE CONNECTIONS INCCOM94106B101137421336SHSOLE 2133600WATSCO INCCOM94262220021977142521SHSOLE 80706061815WESTERN ALLIANCE BANCORPCOM95763810930751625020SHSOLE 61620008820WESTERN DIGITAL CORPCOM958102105668575450SHSOLE 41900033550WNS HOLDINGS LTDSPON ADR92932M10128721835890SHSOLE 4729950362895WRIGHT MED GROUP N VORD SHS 0.03 PARN96617118666792425566SHSOLE 16386240786942ZAYO GROUP HLDGS INCCOM98919V10518830609400SHSOLE 4662600143140ZENDESK INCCOM98936J101295711064475SHSOLE 6255360438939ZYNGA INCCL A98986T10821559100SHSOLE 5910000