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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 2020-06-30, filed 2020-08-13, with 230 holding rows worth $14,541,816,000.

Accession
0001085146-20-002166
Filed
2020-08-13
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q2 2020

A holdings report, 230 entries on the cover page, a total value of $14,541,816,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $14,541,816,000 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
Amazon.com, Inc023135106COM187,993$518,639,000thousands by filing date
Apple Inc037833100COM1,363,135$497,272,000thousands by filing date
Microsoft Corp594918104COM2,237,146$455,282,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM244,518$346,739,000thousands by filing date
ServiceNow,Inc.81762P102COM752,415$304,773,000thousands by filing date
META PLATFORMS INC CL A30303M102COM1,284,047$291,569,000thousands by filing date
SPLUNK INC848637104COM1,325,144$263,306,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock1,742,009$233,586,000thousands by filing date
Visa Inc92826C839COM1,165,120$225,066,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR1,438,665$212,779,000thousands by filing date
Salesforce.com, Inc79466L302COM1,133,287$212,299,000thousands by filing date
Home Depot, Inc437076102COM798,981$200,153,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK1,105,032$192,530,000thousands by filing date
GLOBAL PMTS INC37940X102COM993,161$168,460,000thousands by filing date
HUMANA INC COM444859102Stock427,187$165,642,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM454,586$164,715,000thousands by filing date
ZENDESK INC98936J101COM1,825,925$161,649,000thousands by filing date
BIO RAD LABS INC090572207CL A355,370$160,446,000thousands by filing date
FORTINET INC COM34959E109Stock1,147,388$157,502,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM533,578$154,903,000thousands by filing date
Applied Materials,Inc.038222105COM2,432,800$147,063,000thousands by filing date
ALIGN TECHNOLOGY INC COM016255101Stock527,450$144,753,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock316,575$139,942,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock828,417$139,555,000thousands by filing date
L3HARRIS TECHNOLOGIES INC COM502431109Stock800,715$135,857,000thousands by filing date
NIKE,Inc. Class B654106103COM1,381,237$135,430,000thousands by filing date
AMETEK INC COM031100100Stock1,498,192$133,893,000thousands by filing date
TWILIO INC CL A90138F102Stock604,070$132,545,000thousands by filing date
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,457,449$129,684,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock157,685$127,023,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock404,878$125,897,000thousands by filing date
S&P Global,Inc.78409V104COM377,157$124,266,000thousands by filing date
TREX CO INC89531P105COM905,188$117,738,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock995,564$113,454,000thousands by filing date
CHARTER COMMUNICATIONS INC N16119P108COM220,881$112,658,000thousands by filing date
Bristol-Myers Squibb Company110122108COM1,914,436$112,569,000thousands by filing date
OREILLY AUTOMOTIVE INC COM67103H107Stock264,407$111,492,000thousands by filing date
TOPBUILD COR COM89055F103Stock973,655$110,773,000thousands by filing date
IDEXX LABS INC COM45168D104Stock330,676$109,176,000thousands by filing date
Boston Scientific Corporation101137107COM3,100,151$108,846,000thousands by filing date
T-Mobile US,Inc.872590104COM1,042,804$108,608,000thousands by filing date
STERIS PLC SHS USDG8473T100Stock707,463$108,553,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR567,793$107,449,000thousands by filing date
HUNT J B TRANS SVCS INC COM445658107Stock845,761$101,779,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock1,028,601$100,278,000thousands by filing date
Broadcom Inc.11135F101COM302,853$95,583,000thousands by filing date
Qualcomm Incorporated747525103COM996,363$90,878,000thousands by filing date
WORKDAY INC CL A98138H101Stock482,552$90,411,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM346,898$87,255,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock406,626$86,611,000thousands by filing date
TRANSUNION COM89400J107Stock983,881$85,637,000thousands by filing date
ADVANCED DRAIN SYS INC DEL COM00790R104Stock1,710,232$84,485,000thousands by filing date
NVIDIA Corp67066G104COM220,452$83,752,000thousands by filing date
SCIENCE APPLICATIONS INTL CORP COM808625107Stock1,061,976$82,494,000thousands by filing date
Union Pacific Corporation907818108COM487,792$82,471,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM1,052,183$82,070,000thousands by filing date
BIOMARIN PHARMACEUTICAL INC09061G101COM665,057$82,028,000thousands by filing date
HUBSPOTINC443573100STOK363,217$81,488,000thousands by filing date
DROPBOX INC CL A26210C104Stock3,700,038$80,550,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT269,716$80,354,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock989,385$77,568,000thousands by filing date
CATALENT INC USD 0.01148806102COM1,045,561$76,640,000thousands by filing date
NOVARTIS AG SPONSORED ADR66987V109ADR857,963$74,934,000thousands by filing date
WILLIS TOWERS WATSON PLC LTD SHSG96629103Stock380,207$74,882,000thousands by filing date
WEX INC96208T104COM450,700$74,370,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock103,787$73,758,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock1,361,242$71,424,000thousands by filing date
Cisco Systems,Inc.17275R102COM1,505,799$70,230,000thousands by filing date
MASIMO CORP COM574795100Stock303,727$69,247,000thousands by filing date
ZYNGA INC.98986T108CL A7,253,357$69,197,000thousands by filing date
SEATTLE GENETICS INC812578102COM405,326$68,873,000thousands by filing date
CONSTELLATION BRANDS INC CL A21036P108Stock386,429$67,606,000thousands by filing date
SS&C TECH HLDGS COM78467J100Stock1,193,675$67,419,000thousands by filing date
Walmart Inc.931142103COM556,767$66,690,000thousands by filing date
TRADEWEB MKTS INC CL A892672106Stock1,113,024$64,711,000thousands by filing date
DEXCOM INC COM252131107Stock158,898$64,417,000thousands by filing date
ACCELERON PHARMA INC00434H108COM664,994$63,354,000thousands by filing date
KBHOME48666K109COM2,064,337$63,334,000thousands by filing date
HILTON WORLDWIDE HLDGS INC COM43300A203Stock849,204$62,374,000thousands by filing date
FIVE BELOW INC COM33829M101Stock582,689$62,295,000thousands by filing date
SUN CMNTYS INC COM866674104REIT455,999$61,870,000thousands by filing date
AMEDISYS INC023436108COM308,728$61,295,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM727,036$61,246,000thousands by filing date
ETSY INC29786A106COM566,238$60,151,000thousands by filing date
ROSS STORES INC COM778296103Stock702,128$59,849,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW205,509$58,291,000thousands by filing date
NXP SEMICONDUCTORS N V COMN6596X109Stock504,279$57,508,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock333,143$56,498,000thousands by filing date
RPM INTL INC COM749685103Stock748,979$56,218,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK5,341,204$55,121,000thousands by filing date
BLACKSTONE INC09260D107COM966,378$54,755,000thousands by filing date
INSULET CORP COM45784P101Stock281,823$54,747,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock266,642$54,240,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM301,610$52,586,000thousands by filing date
Intel Corp458140100COM847,961$50,734,000thousands by filing date
TIMKEN CO887389104COM1,094,647$49,795,000thousands by filing date
LULULEMON ATHLETICA INC550021109COM158,530$49,463,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock117,800$49,245,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM399,466$48,735,000thousands by filing date
XILINX INC983919101COM492,826$48,489,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM302,145$48,446,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock593,759$48,350,000thousands by filing date
REALPAGE INC75606N109COM736,592$47,886,000thousands by filing date
COGNIZANT TECHNOLOGY SOLUTIONS CL A192446102Stock838,347$47,635,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock237,124$46,697,000thousands by filing date
BLOCK INC CL A852234103Stock437,214$45,881,000thousands by filing date
MSCI INC COM55354G100Stock136,030$45,410,000thousands by filing date
CHIPOTLEMEXICANGRILLI169656105STOK41,642$43,822,000thousands by filing date
PALOMAR HLDGS INC COM69753M105Stock510,190$43,754,000thousands by filing date
VIAVI SOLUTIONS INC925550105COM3,382,207$43,089,000thousands by filing date
ATLASSIAN CORPG06242104CL A235,411$42,438,000thousands by filing date
MOTOROLA SOLUTIONS INC COM NEW620076307Stock296,714$41,579,000thousands by filing date
FMC CORP COM NEW302491303Stock414,338$41,276,000thousands by filing date
PROOFPOINT INC743424103COM358,146$39,797,000thousands by filing date
JPMorgan Chase & Co46625H100COM415,717$39,102,000thousands by filing date
BOTTOMLINE TECH INC DEL101388106COM749,166$38,035,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM830,658$36,815,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock507,100$36,795,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM1,450,281$36,699,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock348,458$36,696,000thousands by filing date
MONGODB INC CL A60937P106Stock158,550$35,886,000thousands by filing date
ROCKET PHARMACEUTICALS INC77313F106COM1,711,501$35,822,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock232,484$34,150,000thousands by filing date
PRIMERICA INC74164M108COM291,602$34,001,000thousands by filing date
CDW CORP COM12514G108Stock291,966$33,921,000thousands by filing date
ASSURANT INC COM04621X108Stock321,826$33,241,000thousands by filing date
MIMECAST LIMITEDG14838109ORD SHS773,774$32,235,000thousands by filing date
FIRST AMERN FINL CORP31847R102COM666,253$31,993,000thousands by filing date
BROOKFIELD ASSET MANAGEMENT IN112585104CL A LTD VT SH971,269$31,955,000thousands by filing date
UNIFIRST CORP MASS904708104COM177,399$31,746,000thousands by filing date
AVALARA INC05338G106COM236,755$31,510,000thousands by filing date
ADVANCED ENERGY INDS COM007973100Stock459,846$31,173,000thousands by filing date
ANAPLAN INC03272L108COM671,654$30,433,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM173,471$30,331,000thousands by filing date
CERIDIAN HCM HLDG INC15677J108COM381,034$30,205,000thousands by filing date
REPLIGEN CORP COM759916109Stock238,103$29,432,000thousands by filing date
INSMED INC COM PAR $.01457669307Stock1,036,711$28,551,000thousands by filing date
2U INC90214J101COM720,096$27,335,000thousands by filing date
HEICO CORP NEW422806208CL A335,820$27,282,000thousands by filing date
GROCERY OUTLET HLDG CORP COM39874R101Stock663,346$27,065,000thousands by filing date
IDEX CORP COM45167R104Stock169,307$26,757,000thousands by filing date
Apollo Global Management Inc03768E105COM CL A533,633$26,639,000thousands by filing date
ACADIA PHARMACEUTICALS INC004225108COM545,976$26,463,000thousands by filing date
EQUITY LIFESTYLE PROPERTIES COM29472R108REIT418,909$26,173,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW263,433$26,059,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock275,903$25,877,000thousands by filing date
STORE CAP CORP862121100COM1,082,826$25,782,000thousands by filing date
SITIME CORP COM82982T106Stock542,578$25,724,000thousands by filing date
ESSENTIAL PPTYS RLTY TR INC COM29670E107REIT1,729,053$25,659,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR461,974$25,399,000thousands by filing date
NCR VOYIX CORPORATION62886E108COM1,443,476$25,001,000thousands by filing date
WOODWARD INC COM980745103Stock319,618$24,786,000thousands by filing date
REATA PHARMACEUTICALS INC75615P103CL A158,746$24,768,000thousands by filing date
TEXAS ROADHOUSE INC COM882681109Stock465,241$24,458,000thousands by filing date
REXFORD INDL RLTY INC COM76169C100REIT570,188$23,623,000thousands by filing date
QORVO INC COM74736K101Stock213,018$23,545,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock262,468$23,507,000thousands by filing date
SAGE THERAPEUTICS INC78667J108COM562,457$23,387,000thousands by filing date
MERITOR INC59001K100COMMON STOCK1,174,933$23,264,000thousands by filing date
BRP INC COM SUN VTG05577W200Stock545,363$23,222,000thousands by filing date
MKS INC. COM55306N104Stock204,635$23,173,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock276,151$23,111,000thousands by filing date
ITT INC COM45073V108Stock391,199$22,979,000thousands by filing date
Goldman Sachs Group,Inc.38141G104COM114,500$22,627,000thousands by filing date
MSA SAFETY INC COM553498106Stock197,116$22,558,000thousands by filing date
YETI HLDGS INC COM98585X104Stock520,455$22,239,000thousands by filing date
FIRST REPUBLIC BANK/SAN FRANCI33616C100COM208,152$22,062,000thousands by filing date
EXTENDED STAY AMER INC30224P200UNIT 99/99/9999B1,954,859$21,875,000thousands by filing date
SIGNATURE BANK82669G104COM202,271$21,627,000thousands by filing date
TERRENO RLTY CORP88146M101COM406,537$21,400,000thousands by filing date
AZEK CO INC05478C105CL A671,425$21,392,000thousands by filing date
SILICON MOTION TECHNOLOGY CORP SPONSORED ADR82706C108ADR420,139$20,490,000thousands by filing date
HOWARD HUGHES CORPORATION44267D107COMMON STOCK391,115$20,318,000thousands by filing date
REPAY HLDGS CORP76029L100COM CL A794,069$19,558,000thousands by filing date
JUNIPER NETWORKS INC48203R104COM823,587$18,827,000thousands by filing date
PAYLOCITY HLDG CORP COM70438V106Stock127,926$18,663,000thousands by filing date
MAXLINEAR INC57776J100COM824,777$17,700,000thousands by filing date
CHAMPION HOMES INC830830105COM726,965$17,694,000thousands by filing date
HAMILTON LANE INC407497106CL A261,819$17,639,000thousands by filing date
CHURCHILL DOWNS INC171484108COM131,644$17,528,000thousands by filing date
ACI WORLDWIDE INC COM004498101Stock624,878$16,865,000thousands by filing date
TURNING PT THERAPEUTICS90041T108COM256,078$16,540,000thousands by filing date
CYRUSONE INC23283R100COM226,420$16,472,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM438,323$15,039,000thousands by filing date
GLOBAL BLOOD THERAPEUTICS USD37890U108COM230,948$14,580,000thousands by filing date
ENVESTNET INC29404K106COM189,913$13,966,000thousands by filing date
MOMENTA PHARMACEUTICALS INC60877T100COM409,804$13,634,000thousands by filing date
Abbott Laboratories002824100COM123,473$11,289,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock88,195$10,062,000thousands by filing date
NATIONAL STORAGE AFFILIATES TR COM SHS BEN IN637870106REIT323,336$9,267,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT53,510$8,682,000thousands by filing date
SELECTQUOTE INC816307300COM333,435$8,446,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM41,024$7,550,000thousands by filing date
TARGET CORP COM87612E106Stock58,815$7,054,000thousands by filing date
Merck & Co.,Inc.58933Y105COM88,789$6,866,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM4,824$6,819,000thousands by filing date
Starbucks Corporation855244109COM87,004$6,403,000thousands by filing date
Verizon Communications Inc92343V104COM115,660$6,376,000thousands by filing date
Comcast Corp20030N101COM151,774$5,916,000thousands by filing date
Danaher Corporation235851102COM32,167$5,688,000thousands by filing date
PepsiCo,Inc.713448108COM36,420$4,817,000thousands by filing date
PRICE T ROWE GROUP INC COM74144T108Stock36,510$4,509,000thousands by filing date
Citigroup Inc.172967424COM87,645$4,479,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock37,450$4,389,000thousands by filing date
SERVICE CORP INTL COM817565104Stock108,850$4,233,000thousands by filing date
KLA CORP482480100COM21,525$4,186,000thousands by filing date
BLACKROCK INC CL A COM09247X101COM7,680$4,179,000thousands by filing date
TELADOC HEALTH INC87918A105COM18,018$3,439,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM98,166$2,470,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock12,140$2,211,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock51,967$2,155,000thousands by filing date
STRATEGIC ED INC COM86272C103Stock12,260$1,884,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock26,730$1,840,000thousands by filing date
GARTNERINC366651107STOK14,370$1,744,000thousands by filing date
Costco Wholesale Corporation22160K105COM3,656$1,109,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW22,980$1,080,000thousands by filing date
American Tower Corporation03027X100COM2,932$758,000thousands by filing date
Walt Disney Co254687106COM6,720$749,000thousands by filing date
CSX Corporation126408103COM9,530$665,000thousands by filing date
NVR INC COM62944T105Stock180$587,000thousands by filing date
CUTERA INC232109108COM42,680$519,000thousands by filing date
BIOGEN INC COM09062X103Stock1,832$490,000thousands by filing date
THE BALDWIN INSURANCE GRP IN05589G102COM CL A27,690$478,000thousands by filing date
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF2,780$440,000thousands by filing date
SVB FINANCIAL GROUP78486Q101COM1,900$410,000thousands by filing date
ALIBABA GROUP HLDG LTD01609W102SPONSORED ADS1,893$408,000thousands by filing date
NUTANIX INC CL A67059N108Stock17,025$404,000thousands by filing date
DOCUSIGN INC COM256163106Stock2,180$375,000thousands by filing date
International Business Machines Corporation459200101COM2,000$242,000thousands by filing date
ISHARESRUSSELL1000GROWTHETF464287614STOK1,117$214,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-20-002166this filing2020-08-13acceptance time not in the bulk data set