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13F-HR filed by WESTFIELD CAPITAL MANAGEMENT CO LP

WESTFIELD CAPITAL MANAGEMENT CO LP filed this 13F-HR for the quarter ended 2020-03-31, filed 2020-05-14, with 216 holding rows worth $11,354,045,000.

Accession
0001085146-20-001482
Filed
2020-05-14
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2020

A holdings report, 216 entries on the cover page, a total value of $11,354,045,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $11,354,045,000 with VALUE read as thousands by filing date, 13F file number 028-10220. The quarter's positions are built on this report. The resolved quarter.

The information table after summing rows of one CUSIP and put or call (H4), with the CUSIP and issuer name as filed. Values in dollars after the unit check (method).

Issuer as filedCUSIPClassAmountValueValue read asType
Apple Inc037833100COM1,424,618$362,266,000thousands by filing date
Microsoft Corp594918104COM2,251,704$355,116,000thousands by filing date
Amazon.com, Inc023135106COM172,404$336,140,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM256,074$297,545,000thousands by filing date
ServiceNow,Inc.81762P102COM757,574$217,106,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock1,769,957$215,298,000thousands by filing date
META PLATFORMS INC CL A30303M102COM1,253,974$209,163,000thousands by filing date
Visa Inc92826C839COM1,185,935$191,078,000thousands by filing date
SPLUNK INC848637104COM1,381,744$174,418,000thousands by filing date
Salesforce.com, Inc79466L302COM1,153,424$166,070,000thousands by filing date
L3HARRIS TECHNOLOGIES INC COM502431109Stock852,470$153,547,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR1,363,342$153,526,000thousands by filing date
Home Depot, Inc437076102COM810,313$151,294,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM627,490$149,311,000thousands by filing date
HUMANA INC COM444859102Stock458,306$143,917,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock476,818$141,744,000thousands by filing date
GLOBAL PMTS INC37940X102COM966,093$139,340,000thousands by filing date
BIO RAD LABS INC090572207CL A389,898$136,683,000thousands by filing date
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,638,159$135,296,000thousands by filing date
DEXCOM INC COM252131107Stock501,787$135,116,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM458,961$130,161,000thousands by filing date
S&P Global,Inc.78409V104COM494,899$121,275,000thousands by filing date
FORTINET INC COM34959E109Stock1,159,712$117,328,000thousands by filing date
CHARTER COMMUNICATIONS INC N16119P108COM266,057$116,083,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock359,386$115,072,000thousands by filing date
Applied Materials,Inc.038222105COM2,421,339$110,946,000thousands by filing date
ZENDESK INC98936J101COM1,729,420$110,700,000thousands by filing date
AMETEK INC COM031100100Stock1,525,827$109,890,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK1,144,169$109,543,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT798,170$109,397,000thousands by filing date
Bristol-Myers Squibb Company110122108COM1,917,069$106,857,000thousands by filing date
NVIDIA Corp67066G104COM404,322$106,579,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock772,782$105,098,000thousands by filing date
NOVARTIS AG SPONSORED ADR66987V109ADR1,252,684$103,284,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock1,201,309$97,919,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock141,462$97,681,000thousands by filing date
STERIS PLC SHS USDG8473T100Stock656,414$91,878,000thousands by filing date
Broadcom Inc.11135F101COM386,051$91,533,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM629,902$89,522,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT320,307$86,473,000thousands by filing date
IDEXX LABS INC COM45168D104Stock354,957$85,985,000thousands by filing date
HUNT J B TRANS SVCS INC COM445658107Stock902,623$83,249,000thousands by filing date
Union Pacific Corporation907818108COM579,091$81,675,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR561,291$80,579,000thousands by filing date
NIKE,Inc. Class B654106103COM939,147$77,705,000thousands by filing date
Cisco Systems,Inc.17275R102COM1,975,876$77,672,000thousands by filing date
MASIMO CORP COM574795100Stock433,277$76,742,000thousands by filing date
BLACKSTONE INC09260D107COM1,644,886$74,957,000thousands by filing date
TREX CO INC89531P105COM934,702$74,907,000thousands by filing date
BIOMARIN PHARMACEUTICAL INC09061G101COM838,657$70,867,000thousands by filing date
CONSTELLATION BRANDS INC CL A21036P108Stock493,562$70,757,000thousands by filing date
WILLIS TOWERS WATSON PLC LTD SHSG96629103Stock394,840$67,064,000thousands by filing date
FISERV INC337738108COM705,628$67,028,000thousands by filing date
TOPBUILD COR COM89055F103Stock924,960$66,264,000thousands by filing date
TRANSUNION COM89400J107Stock998,643$66,090,000thousands by filing date
Walmart Inc.931142103COM579,817$65,879,000thousands by filing date
Boston Scientific Corporation101137107COM1,934,884$63,135,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock785,289$63,059,000thousands by filing date
WORKDAY INC CL A98138H101Stock482,538$62,836,000thousands by filing date
TWILIO INC CL A90138F102Stock701,300$62,759,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock104,934$61,618,000thousands by filing date
CATALENT INC USD 0.01148806102COM1,171,313$60,850,000thousands by filing date
ROSS STORES INC COM778296103Stock695,519$60,489,000thousands by filing date
SEATTLE GENETICS INC812578102COM523,273$60,375,000thousands by filing date
OREILLY AUTOMOTIVE INC COM67103H107Stock199,458$60,047,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM1,024,607$59,919,000thousands by filing date
SS&C TECH HLDGS COM78467J100Stock1,355,088$59,380,000thousands by filing date
SCIENCE APPLICATIONS INTL CORP COM808625107Stock787,065$58,739,000thousands by filing date
ACCELERON PHARMA INC00434H108COM645,364$57,999,000thousands by filing date
HILTON WORLDWIDE HLDGS INC COM43300A203Stock845,974$57,729,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW207,391$57,171,000thousands by filing date
RPM INTL INC COM749685103Stock951,697$56,626,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM648,157$56,098,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock1,027,545$55,929,000thousands by filing date
COGNIZANT TECHNOLOGY SOLUTIONS CL A192446102Stock1,174,394$54,574,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock174,502$53,693,000thousands by filing date
CARTERS INC146229109COM809,756$53,225,000thousands by filing date
MSCI INC COM55354G100Stock180,725$52,222,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM709,340$48,944,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock229,291$48,474,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK4,785,126$48,282,000thousands by filing date
Progressive Corporation743315103COM651,746$48,125,000thousands by filing date
XILINX INC983919101COM614,738$47,913,000thousands by filing date
TRADEWEB MKTS INC CL A892672106Stock1,124,957$47,293,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock268,920$47,249,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock472,822$47,121,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock305,251$46,065,000thousands by filing date
T-Mobile US,Inc.872590104COM526,273$44,154,000thousands by filing date
FIVE BELOW INC COM33829M101Stock615,214$43,299,000thousands by filing date
Citigroup Inc.172967424COM1,021,751$43,036,000thousands by filing date
Starbucks Corporation855244109COM652,351$42,886,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock613,150$41,572,000thousands by filing date
HUBSPOTINC443573100STOK307,193$40,915,000thousands by filing date
YUM CHINA HLDGS INC98850P109COM942,228$40,167,000thousands by filing date
REALPAGE INC75606N109COM746,780$39,527,000thousands by filing date
Intel Corp458140100COM712,278$38,548,000thousands by filing date
AMEDISYS INC023436108COM203,236$37,302,000thousands by filing date
8X8 INC282914100COMMON STOCK2,685,919$37,227,000thousands by filing date
WEX INC96208T104COM346,852$36,263,000thousands by filing date
PROOFPOINT INC743424103COM352,321$36,145,000thousands by filing date
TEXAS ROADHOUSE INC COM882681109Stock870,007$35,931,000thousands by filing date
FMC CORP COM NEW302491303Stock427,806$34,947,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM346,086$33,854,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock212,711$33,706,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock1,000,170$33,536,000thousands by filing date
ATLASSIAN CORPG06242104CL A243,682$33,448,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM178,106$33,224,000thousands by filing date
TIMKEN CO887389104COM1,025,597$33,168,000thousands by filing date
PALOMAR HLDGS INC COM69753M105Stock558,220$32,466,000thousands by filing date
MIMECAST LIMITEDG14838109ORD SHS912,619$32,215,000thousands by filing date
REPLIGEN CORP COM759916109Stock328,184$31,683,000thousands by filing date
BROOKFIELD ASSET MANAGEMENT IN112585104CL A LTD VT SH714,366$31,611,000thousands by filing date
NCR VOYIX CORPORATION62886E108COM1,751,950$31,010,000thousands by filing date
FLOWSERVE CORP34354P105COM1,272,774$30,407,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock514,752$29,887,000thousands by filing date
REATA PHARMACEUTICALS INC75615P103CL A203,549$29,380,000thousands by filing date
ELDORADO RESORTS INC28470R102COM2,019,164$29,076,000thousands by filing date
Micron Technology,Inc.595112103COM684,891$28,807,000thousands by filing date
ZYNGA INC.98986T108CL A4,197,657$28,754,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock896,719$28,623,000thousands by filing date
FIRSTCASH HOLDINGS INC.33767D105Common Stock391,924$28,117,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM221,610$27,969,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM782,873$26,391,000thousands by filing date
GUIDEWIRE SOFTWARE INC COM40171V100Stock314,127$24,913,000thousands by filing date
EQUITY LIFESTYLE PROPERTIES COM29472R108REIT424,919$24,424,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock302,993$23,482,000thousands by filing date
ROCKET PHARMACEUTICALS INC77313F106COM1,681,434$23,456,000thousands by filing date
BLOCK INC CL A852234103Stock440,172$23,056,000thousands by filing date
CDW CORP COM12514G108Stock244,529$22,807,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM1,358,061$22,788,000thousands by filing date
ETSY INC29786A106COM581,372$22,348,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock168,867$22,165,000thousands by filing date
Apollo Global Management Inc03768E105COM CL A653,859$21,904,000thousands by filing date
HEICO CORP NEW422806208CL A340,538$21,760,000thousands by filing date
ACADIA PHARMACEUTICALS INC004225108COM509,885$21,543,000thousands by filing date
GROCERY OUTLET HLDG CORP COM39874R101Stock622,402$21,373,000thousands by filing date
COUSINSPPTYSINC222795502STOK728,547$21,325,000thousands by filing date
UNIFIRST CORP MASS904708104COM139,080$21,014,000thousands by filing date
TELADOC HEALTH INC87918A105COM135,028$20,931,000thousands by filing date
TERRENO RLTY CORP88146M101COM403,467$20,879,000thousands by filing date
ANAPLAN INC03272L108COM689,610$20,868,000thousands by filing date
MKS INC. COM55306N104Stock254,990$20,769,000thousands by filing date
VIAVI SOLUTIONS INC925550105COM1,745,018$19,562,000thousands by filing date
CERIDIAN HCM HLDG INC15677J108COM386,692$19,362,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW299,640$19,282,000thousands by filing date
IDEX CORP COM45167R104Stock138,808$19,171,000thousands by filing date
ADVANCED ENERGY INDS COM007973100Stock393,324$19,072,000thousands by filing date
ADVANCED DRAIN SYS INC DEL COM00790R104Stock640,975$18,870,000thousands by filing date
MSA SAFETY INC COM553498106Stock184,619$18,683,000thousands by filing date
AVALARA INC05338G106COM240,071$17,909,000thousands by filing date
ZEBRA TECHNOLOGIES CORPORATION CL A989207105Stock92,156$16,920,000thousands by filing date
JUNIPER NETWORKS INC48203R104COM865,690$16,569,000thousands by filing date
BOTTOMLINE TECH INC DEL101388106COM445,397$16,324,000thousands by filing date
FIRST AMERN FINL CORP31847R102COM383,327$16,257,000thousands by filing date
HAMILTON LANE INC407497106CL A291,924$16,146,000thousands by filing date
CADENCE DESIGN SYSTEM INC COM127387108Stock241,780$15,967,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock274,537$15,849,000thousands by filing date
MERITOR INC59001K100COMMON STOCK1,192,567$15,802,000thousands by filing date
SITIME CORP COM82982T106Stock695,208$15,135,000thousands by filing date
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock138,664$15,094,000thousands by filing date
ACI WORLDWIDE INC COM004498101Stock597,192$14,422,000thousands by filing date
NUTANIX INC CL A67059N108Stock911,971$14,409,000thousands by filing date
ALIBABA GROUP HLDG LTD01609W102SPONSORED ADS73,913$14,375,000thousands by filing date
FIRST REPUBLIC BANK/SAN FRANCI33616C100COM173,128$14,245,000thousands by filing date
PAYLOCITY HLDG CORP COM70438V106Stock156,123$13,789,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock185,396$13,664,000thousands by filing date
PRIMERICA INC74164M108COM143,610$12,707,000thousands by filing date
SIGNATURE BANK82669G104COM157,068$12,627,000thousands by filing date
KBHOME48666K109COM696,355$12,604,000thousands by filing date
SAGE THERAPEUTICS INC78667J108COM426,692$12,255,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock115,532$11,784,000thousands by filing date
ESSENT GROUP LTD COMG3198U102Stock426,471$11,233,000thousands by filing date
CHAMPION HOMES INC830830105COM682,890$10,708,000thousands by filing date
Abbott Laboratories002824100COM130,150$10,270,000thousands by filing date
REPAY HLDGS CORP76029L100COM CL A714,795$10,257,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock97,045$9,886,000thousands by filing date
ENVESTNET INC29404K106COM179,118$9,633,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM412,096$9,153,000thousands by filing date
NXP SEMICONDUCTORS N V COMN6596X109Stock108,974$9,037,000thousands by filing date
JPMorgan Chase & Co46625H100COM98,880$8,902,000thousands by filing date
MOMENTA PHARMACEUTICALS INC60877T100COM317,403$8,633,000thousands by filing date
GLOBAL BLOOD THERAPEUTICS USD37890U108COM161,169$8,234,000thousands by filing date
TURNING PT THERAPEUTICS90041T108COM176,421$7,879,000thousands by filing date
ORION S.A.L72967109COM1,018,384$7,597,000thousands by filing date
Merck & Co.,Inc.58933Y105COM97,124$7,473,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM47,079$7,309,000thousands by filing date
Texas Instruments Incorporated882508104COM71,695$7,164,000thousands by filing date
Verizon Communications Inc92343V104COM133,025$7,147,000thousands by filing date
MATSON INC COM57686G105Stock232,628$7,123,000thousands by filing date
CVS Health Corporation126650100COM108,670$6,447,000thousands by filing date
TARGET CORP COM87612E106Stock67,075$6,236,000thousands by filing date
ORCHARD THERAPEUTICS PLC68570P101ADR727,736$5,480,000thousands by filing date
INTERSECT ENT INC46071F103COM456,423$5,409,000thousands by filing date
PARKER-HANNIFIN CORP COM701094104Stock41,170$5,341,000thousands by filing date
Qualcomm Incorporated747525103COM78,690$5,323,000thousands by filing date
SERVICE CORP INTL COM817565104Stock123,640$4,836,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM4,059$4,720,000thousands by filing date
Danaher Corporation235851102COM32,287$4,469,000thousands by filing date
TAIWAN SEMICONDUCTOR MFG874039100SPONSORED ADS92,340$4,413,000thousands by filing date
NextEra Energy,Inc.65339F101COM16,075$3,868,000thousands by filing date
CME Group Inc. Class A12572Q105COM22,199$3,838,000thousands by filing date
CERENCE INC COM156727109Stock168,641$2,597,000thousands by filing date
LULULEMON ATHLETICA INC550021109COM13,662$2,590,000thousands by filing date
LIVE NATION ENTERTAINMENT INC COM538034109Stock47,350$2,153,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM98,166$2,014,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock12,140$1,793,000thousands by filing date
STRATEGIC ED INC COM86272C103Stock12,260$1,713,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock26,730$1,689,000thousands by filing date
GARTNERINC366651107STOK14,370$1,431,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW22,980$1,027,000thousands by filing date
CYPRESS SEMICONDUCTOR CORP232806109COM25,020$583,000thousands by filing date
CSX Corporation126408103COM9,530$546,000thousands by filing date
DOCUSIGN INC COM256163106Stock5,430$502,000thousands by filing date
VALERO ENERGY CORP COM91913Y100Stock8,080$367,000thousands by filing date
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF2,780$338,000thousands by filing date
International Business Machines Corporation459200101COM2,000$222,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-20-001482this filing2020-05-14acceptance time not in the bulk data set