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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 2025-12-31, filed 2026-02-11, with 241 holding rows worth $24,005,011,742.

Accession
0001177719-26-000005
Filed
2026-02-11
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q4 2025

A holdings report, 241 entries on the cover page, a total value of $24,005,011,742 stated on the cover page (in dollars after the unit check, H1), rows summing to $24,005,011,742 with VALUE read as dollars as filed, 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
NVIDIA Corp67066G104COM5,951,049$1,109,870,719dollars as filed
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR5,185,696$1,105,797,733dollars as filed
Apple Inc037833100COM3,274,318$890,156,149dollars as filed
Microsoft Corp594918104COM1,621,219$784,054,129dollars as filed
Alphabet Inc. Reg. Shares A02079K305COM2,178,478$681,863,695dollars as filed
COMFORT SYS USA INC COM199908104Stock668,835$624,217,111dollars as filed
Amazon.com, Inc023135106COM2,330,770$537,988,375dollars as filed
AXONENTERPRISEINC05464C101STOK831,177$472,050,610dollars as filed
FTAI AVIATION LTD SHSG3730V105Stock2,350,625$462,720,531dollars as filed
HOWMET AEROSPACE INC COM443201108Stock2,219,125$454,964,962dollars as filed
META PLATFORMS INC CL A30303M102COM655,283$432,545,694dollars as filed
Broadcom Inc.11135F101COM1,112,318$384,973,115dollars as filed
VERTIV HOLDINGS CO COM CL A92537N108Stock2,277,716$369,012,808dollars as filed
Eli Lilly and Company532457108COM277,549$298,276,527dollars as filed
TAPESTRY INC COM876030107Stock2,098,104$268,074,735dollars as filed
REVOLUTION MEDICINES INC COM76155X100Stock2,845,013$226,605,319dollars as filed
ServiceNow,Inc.81762P102COM1,476,803$226,231,524dollars as filed
LPL FINL HLDGS INC COM50212V100Stock625,562$223,431,883dollars as filed
Visa Inc92826C839COM603,926$211,802,953dollars as filed
Bank of America Corp060505104COM3,823,609$210,298,513dollars as filed
Tesla Motors, Inc88160R101COM461,675$207,624,330dollars as filed
MASIMO CORP COM574795100Stock1,522,049$197,957,646dollars as filed
ARES MANAGEMENT CORPORATION CL A COM STK03990B101Stock1,151,200$186,068,483dollars as filed
AMETEK INC COM031100100Stock900,216$184,823,313dollars as filed
ROCKETLABCORPCLASSCLASSA773121108STOK2,592,443$180,848,824dollars as filed
SEMTECH CORP COM816850101Stock2,448,612$180,438,198dollars as filed
HEALTHEQUITY INC COM42226A107Stock1,952,452$178,864,128dollars as filed
FIFTH THIRD BANCORP COM316773100Stock3,746,926$175,393,613dollars as filed
AUTOZONE INC COM053332102Stock51,122$173,379,435dollars as filed
MARVELL TECHNOLOGY INC573874104COM1,947,807$165,524,653dollars as filed
NATERA INC COM632307104Stock714,692$163,728,859dollars as filed
VAXCYTE INC COM92243G108Stock3,539,717$163,322,542dollars as filed
CASELLA WASTE SYS INC147448104CL A1,665,226$163,092,234dollars as filed
Netflix, Inc64110L106COM1,597,547$149,786,032dollars as filed
DYNATRACE INC COM NEW268150109Stock3,356,708$145,479,725dollars as filed
SNOWFLAKE INC COM SHS833445109Stock649,105$142,387,741dollars as filed
HUBSPOTINC443573100STOK352,154$141,319,255dollars as filed
SAMSARA INC COM CL A79589L106Stock3,953,970$140,168,243dollars as filed
ABIVAX SA-00370M103SPONSORED ADS1,009,966$136,198,965dollars as filed
RHYTHM PHARMACEUTICALS INC76243J105COM1,267,158$135,636,592dollars as filed
TAIWAN SEMICONDUCTOR MFG874039100SPONSORED ADS446,195$135,594,105dollars as filed
MKS INC. COM55306N104Stock839,773$134,195,725dollars as filed
LEGEND BIOTECH CORP52490G102SPONSORED ADS6,164,677$134,020,083dollars as filed
COMMVAULT SYS INC COM204166102Stock1,057,077$132,515,173dollars as filed
GENEDX HOLDINGS CORP81663L200COM CL A1,018,261$132,435,026dollars as filed
API GROUP CORP COM STK00187Y100Stock3,453,355$132,125,362dollars as filed
ATLASSIANCORPCLASSA049468101STOK812,215$131,692,460dollars as filed
ADMA BIOLOGICS INC000899104COM6,992,907$127,550,624dollars as filed
REGAL REXNORD CORPORATION758750103COM893,100$125,319,792dollars as filed
ROYAL CARIBBEAN GROUP COMV7780T103Stock448,653$125,138,375dollars as filed
COHERENT CORP COM19247G107Stock665,123$122,761,747dollars as filed
ROKU INC COM CL A77543R102Stock1,112,478$120,692,738dollars as filed
MSCI INC COM55354G100Stock207,792$119,216,459dollars as filed
PRIMORIS SVCS CORP COM74164F103Stock952,196$118,205,611dollars as filed
GE Vernova Inc.36828A101COM177,934$116,292,243dollars as filed
QUANTA SVCS INC74762E102COM273,528$115,445,198dollars as filed
PALOMAR HLDGS INC COM69753M105Stock840,226$113,228,856dollars as filed
LIVE NATION ENTERTAINMENT INC COM538034109Stock775,234$110,470,889dollars as filed
INSULET CORP COM45784P101Stock386,468$109,849,805dollars as filed
DUTCH BROS INC26701L100CL A1,779,616$108,948,092dollars as filed
CENCORA INC COM03073E105Stock319,215$107,814,916dollars as filed
TOPBUILD COR COM89055F103Stock255,451$106,571,603dollars as filed
DESCARTES SYS GROUP INC COM249906108Stock1,193,869$104,654,557dollars as filed
HEICO CORP NEW422806208CL A412,041$104,011,510dollars as filed
HILTON WORLDWIDE HLDGS INC COM43300A203Stock357,721$102,755,321dollars as filed
CLOUDFLARE INC CL A COM18915M107Stock519,475$102,414,407dollars as filed
ITT INC COM45073V108Stock587,446$101,927,755dollars as filed
EVERPURE INC CL A74624M102Stock1,520,219$101,869,854dollars as filed
IDEXX LABS INC COM45168D104Stock147,447$99,752,238dollars as filed
BLOOM ENERGY CORP093712107COM1,145,296$99,514,769dollars as filed
XPO INC COM983793100Stock724,214$98,427,925dollars as filed
EAST WEST BANCORP INC COM27579R104Stock874,152$98,245,943dollars as filed
DOORDASH INC CL A25809K105Stock425,080$96,272,126dollars as filed
AbbVie,Inc.00287Y109COM419,784$95,916,495dollars as filed
DEXCOM INC COM252131107Stock1,439,689$95,552,169dollars as filed
ALKAMI TECHNOLOGY INC01644J108COM4,118,355$95,010,450dollars as filed
NEXTPOWER INC CLASS A COM65290E101Stock1,090,300$94,976,033dollars as filed
KRATOS DEFENSE & SEC SOLUTIO50077B207COM NEW1,245,587$94,552,509dollars as filed
SHARKNINJA INC COM SHSG8068L108Stock840,060$94,002,724dollars as filed
Oracle Corporation68389X105COM474,397$92,464,723dollars as filed
ROCKWELL AUTOMATION INC COM773903109Stock233,795$90,962,620dollars as filed
HOULIHAN LOKEY INC CL A441593100Stock520,002$90,579,148dollars as filed
C H ROBINSON WORLDWIDE IN COM NEW12541W209Stock556,472$89,458,439dollars as filed
OPTION CARE HEALTH INC COM NEW68404L201Stock2,765,305$88,102,617dollars as filed
BURLINGTON STORES INC COM122017106Stock302,307$87,321,512dollars as filed
TECHNIPFMC PLC COMG87110105Stock1,952,427$87,000,147dollars as filed
OREILLY AUTOMOTIVE INC COM67103H107Stock952,702$86,895,993dollars as filed
IMAX CORP45245E109COM2,346,486$86,726,123dollars as filed
FABRINET SHSG3323L100Stock190,170$86,580,676dollars as filed
VISTRA CORP COM92840M102Stock533,945$86,141,415dollars as filed
FIRSTCASH HOLDINGS INC33768G107COM537,734$85,704,045dollars as filed
GLOBE LIFE INC37959E102COM608,813$85,148,586dollars as filed
PERMIAN RESOURCES CORP CLASS A COM71424F105Stock5,951,186$83,495,140dollars as filed
KEYCORP COM493267108Stock4,040,297$83,391,730dollars as filed
PALO ALTO NETWORKS INC697435105COM448,460$82,606,353dollars as filed
DRAFTKINGS INC NEW26142V105COM CL A2,383,054$82,120,057dollars as filed
LINCOLN ELEC HLDGS INC533900106COM337,725$80,932,419dollars as filed
PROCORE TECHNOLOGIES INC COM74275K108Stock1,105,325$80,401,341dollars as filed
TRANSUNION COM89400J107Stock933,553$80,052,170dollars as filed
BIRKENSTOCK HOLDING PLCM2029K104COM SHS1,954,801$79,951,361dollars as filed
WINTRUST FINL CORP COM97650W108Stock559,762$78,265,923dollars as filed
ONTO INNOVATION INC COM683344105Stock483,082$76,259,325dollars as filed
UnitedHealth Group Inc91324P102COM230,278$76,017,145dollars as filed
FAIR ISAAC CORP COM303250104Stock44,593$75,389,529dollars as filed
INSMED INC COM PAR $.01457669307Stock432,521$75,275,955dollars as filed
BRAZE INC10576N102COM CL A2,187,275$75,001,660dollars as filed
JABIL INC COM466313103Stock328,412$74,884,504dollars as filed
SAIA INC78709Y105COM228,751$74,691,777dollars as filed
Danaher Corporation235851102COM321,487$73,594,775dollars as filed
APPLIED INDL TECHNOLOGIES INC COM03820C105Stock285,290$73,253,913dollars as filed
VULCAN MATLS CO COM929160109Stock254,044$72,458,530dollars as filed
F5 INC COM315616102Stock281,299$71,804,383dollars as filed
RED ROCK RESORTS INC75700L108CL A1,157,653$71,716,603dollars as filed
SILICON LABORATORIES INC COM826919102Stock547,403$71,545,572dollars as filed
IDEX CORP COM45167R104Stock401,998$71,531,524dollars as filed
CELSIUS HLDGS INC15118V207COM NEW1,544,215$70,632,394dollars as filed
WYNN RESORTS LTD983134107COM581,717$69,998,007dollars as filed
KKR & CO INC48251W104COM546,499$69,667,650dollars as filed
LEGENCE CORP52476L109CL A1,613,326$69,437,551dollars as filed
GARMIN LTD SHSH2906T109Stock335,744$68,105,623dollars as filed
CREDO TECHNOLOGY GROUP HOLDING ORDINARY SHARESG25457105Stock470,687$67,727,152dollars as filed
GALLAGHER ARTHUR J & CO COM363576109Stock259,491$67,153,723dollars as filed
MONGODB INC CL A60937P106Stock159,529$66,952,601dollars as filed
BLUE OWL CAPITAL INC COM CL A09581B103Stock4,423,608$66,088,704dollars as filed
ADAPTIVE BIOTECHNOLOGIES CORP COM00650F109Stock4,060,481$65,942,211dollars as filed
GENIUS SPORTS LIMITED SHARES CL AG3934V109Stock5,951,203$65,582,257dollars as filed
AFFIRM HLDGS INC COM CL A00827B106Stock851,834$63,402,005dollars as filed
ZSCALERINC98980G102STOK280,807$63,159,107dollars as filed
HUNT J B TRANS SVCS INC COM445658107Stock318,165$61,832,227dollars as filed
CSX Corporation126408103COM1,705,507$61,824,637dollars as filed
KARMAN HLDGS INC COMMON STOCK485924104Stock836,981$61,241,900dollars as filed
CALIX INC13100M509COM1,145,292$60,620,306dollars as filed
PRIMERICA INC74164M108COM234,597$60,610,481dollars as filed
MOODYS CORP COM615369105Stock118,321$60,444,231dollars as filed
PACKAGING CORP AMER COM695156109Stock284,914$58,757,814dollars as filed
BIO-TECHNE CORP09073M104COM994,330$58,476,547dollars as filed
IRHYTHM HOLDINGS INC COM450056106Stock325,063$57,679,179dollars as filed
CLEAN HARBORS INC COM184496107Stock245,594$57,586,881dollars as filed
SYNOPSYS INC COM871607107Stock121,649$57,140,964dollars as filed
DORMAN PRODS INC258278100COM462,212$56,939,896dollars as filed
VITA COCO CO INC92846Q107COM1,073,610$56,912,066dollars as filed
GUARDANT HEALTH INC COM40131M109Stock539,190$55,072,867dollars as filed
XENON PHARMACEUTICALS INC COM98420N105Stock1,226,771$54,983,876dollars as filed
WASTE CONNECTIONS INC COM94106B101Stock313,276$54,936,113dollars as filed
Advanced Micro Devices,Inc.007903107COM250,455$53,637,377dollars as filed
DIAMONDBACK ENERGY INC COM25278X109Stock354,655$53,315,341dollars as filed
PARKER-HANNIFIN CORP COM701094104Stock57,873$50,868,052dollars as filed
STEPSTONE GROUP INC85914M107COM CL A786,501$50,469,769dollars as filed
BIO RAD LABS INC090572207CL A165,107$50,025,770dollars as filed
IONQ INC COM46222L108Stock1,114,665$50,015,019dollars as filed
LATTICE SEMICONDUCTOR CORP COM518415104Stock678,146$49,897,983dollars as filed
F N B CORP302520101COM2,903,113$49,643,232dollars as filed
AVIENT CORPORATION05368V106COM1,574,530$49,188,317dollars as filed
BUILDERS FIRSTSOURCE INC COM12008R107Stock475,697$48,944,464dollars as filed
HAMILTON LANE INC407497106CL A363,487$48,819,939dollars as filed
Salesforce.com, Inc79466L302COM178,508$47,288,601dollars as filed
TALEN ENERGY CORP COM87422Q109Stock124,227$46,565,249dollars as filed
TRANE TECHNOLOGIES PLC SHSG8994E103Stock118,163$45,989,190dollars as filed
TOASTINCCLASSCLASSA888787108STOK1,268,337$45,038,647dollars as filed
RYAN SPECIALTY HOLDINGS INC CL A78351F107Stock814,334$42,044,064dollars as filed
MACOM TECH SOLUTIONS HLDGS INC COM55405Y100Stock231,093$39,581,684dollars as filed
NIQ GLOBAL INTELLIGENCE PLCG63755105ORDINARY SHARES2,388,660$39,389,003dollars as filed
RADNET INC750491102COM531,761$37,941,147dollars as filed
ROBLOX CORP CL A771049103Stock461,670$37,409,108dollars as filed
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock93,444$37,158,099dollars as filed
TARGA RES CORP COM87612G101Stock198,542$36,631,076dollars as filed
ROBINHOOD MKTS INC770700102COM312,554$35,349,810dollars as filed
AVIDITY BIOSCIENCES INC COM05370A108Stock471,127$33,982,391dollars as filed
RAMBUS INC DEL COM750917106Stock362,092$33,272,634dollars as filed
ASTERA LABS INC COM04626A103COM195,294$32,489,110dollars as filed
SPX TECHNOLOGIES INC78473E103COM141,462$28,300,888dollars as filed
Palantir Technologies Inc. Class A69608A108COM154,585$27,477,516dollars as filed
APPLIED DIGITAL CORP COM NEW038169207Stock1,034,397$25,363,414dollars as filed
FORMFACTOR INC COM346375108Stock449,604$25,078,911dollars as filed
TRANSDIGM GROUP INC COM893641100Stock16,193$21,533,597dollars as filed
BICYCLE THERAPEUTICS PLC-ADR088786108SPONSORED ADS3,016,026$21,353,464dollars as filed
RIGETTI COMPUTING INC COMMON STOCK76655K103Stock935,778$20,727,483dollars as filed
CORE SCIENTIFIC INC NEW21874A106COM1,392,132$20,269,442dollars as filed
Alphabet Inc. Reg. Shares C02079K107COM45,820$14,378,316dollars as filed
MUELLER INDS INC COM624756102Stock124,927$14,341,620dollars as filed
WILLIAMS COS INC COM969457100Stock231,177$13,896,049dollars as filed
PATTERN GROUP INC70339W104COM SER A1,184,716$13,671,623dollars as filed
ISHARES CORE S&P U.S. GROWTH ETF464287671ETF66,532$11,173,384dollars as filed
Coca-Cola Company191216100COM132,670$9,274,960dollars as filed
SUMITOMO MITSUI FIN GRP INC86562M209SPONSORED ADR453,681$8,769,654dollars as filed
Wells Fargo & Company949746101COM86,942$8,102,994dollars as filed
MITSUBISHI UFJ FINANCIAL GROUP SPONSORED ADS606822104ADR510,711$8,099,876dollars as filed
CINTAS CORP COM172908105Stock42,271$7,949,907dollars as filed
Thermo Fisher Scientific Inc.883556102COM13,681$7,927,455dollars as filed
Walmart Inc.931142103COM70,910$7,900,083dollars as filed
CUMMINS INC COM231021106Stock15,274$7,796,613dollars as filed
TJX Companies Inc872540109COM48,343$7,425,968dollars as filed
CIENA CORP COM NEW171779309Stock31,750$7,425,373dollars as filed
Home Depot, Inc437076102COM20,347$7,001,403dollars as filed
Johnson & Johnson478160104COM33,288$6,888,952dollars as filed
FIRST CTZNS BANCSHARES INC DEL CL A31946M103Stock3,185$6,835,583dollars as filed
NextEra Energy,Inc.65339F101COM83,926$6,737,579dollars as filed
RAYMOND JAMES FINL INC COM754730109Stock40,095$6,438,856dollars as filed
BANCO BILBAO VIZCAYA ARGENTARI SPONSORED ADR05946K101ADR266,816$6,219,481dollars as filed
ISHARESRUSSELL1000GROWTHETF464287614STOK13,058$6,180,501dollars as filed
Goldman Sachs Group,Inc.38141G104COM7,029$6,178,491dollars as filed
M & T BK CORP COM55261F104Stock29,712$5,986,374dollars as filed
ROLLINS INC COM775711104Stock99,399$5,965,928dollars as filed
CME Group Inc. Class A12572Q105COM21,785$5,949,048dollars as filed
Medtronic PlcG5960L103COM59,970$5,760,718dollars as filed
Merck & Co.,Inc.58933Y105COM53,552$5,636,884dollars as filed
MCKESSON CORP COM58155Q103Stock6,840$5,610,784dollars as filed
McDonalds Corporation580135101COM17,757$5,427,072dollars as filed
HERSHEY CO COM427866108Stock29,000$5,277,420dollars as filed
Citigroup Inc.172967424COM43,744$5,104,487dollars as filed
Gilead Sciences,Inc.375558103COM41,515$5,095,551dollars as filed
EXPEDIA GROUP INC COM NEW30212P303Stock16,577$4,696,430dollars as filed
SOUTHERN COPPER CORP84265V105COM32,634$4,682,000dollars as filed
Schlumberger Limited806857108COM120,910$4,640,526dollars as filed
HALLIBURTON CO COM406216101Stock136,881$3,868,257dollars as filed
CARDINAL HEALTH INC14149Y108COM17,831$3,664,271dollars as filed
GARTNERINC366651107STOK14,370$3,625,264dollars as filed
Pfizer Inc.717081103COM137,936$3,434,606dollars as filed
DOMINION ENERGY INC COM25746U109Stock45,694$2,677,211dollars as filed
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF18,280$2,503,286dollars as filed
RANPAK HOLDINGS CORP75321W103COMMON STOCK407,328$2,203,644dollars as filed
MONDAY COM LTD SHSM7S64H106Stock13,955$2,059,212dollars as filed
Berkshire Hathaway Inc084670702COM2,350$1,181,228dollars as filed
Booking Holdings Inc.09857L108COM210$1,124,619dollars as filed
iShares Silver Trust46428Q109COM16,760$1,079,679dollars as filed
International Business Machines Corporation459200101COM3,320$983,417dollars as filed
APPLOVIN CORP COM CL A03831W108Stock1,284$865,196dollars as filed
Boston Scientific Corporation101137107COM8,672$826,875dollars as filed
PLEXUS CORP COM729132100Stock5,200$764,400dollars as filed
COMERICAINC200340107COM8,560$744,121dollars as filed
MERCADOLIBREINC58733R102STOK313$630,463dollars as filed
EQT CORP COM26884L109Stock10,640$570,304dollars as filed
Vertex Pharmaceuticals Incorporated92532F100COM1,132$513,204dollars as filed
CHURCHILL DOWNS INC171484108COM4,330$492,667dollars as filed
ICON PUB LTD CO SHSG4705A100Stock2,534$461,702dollars as filed
PULMONX CORP745848101COM184,903$408,636dollars as filed
CIDARA THERAPEUTICS INC171757206COM NEW1,411$311,676dollars as filed
IONIS PHARMACEUTICALS INC COM462222100Stock3,157$249,750dollars as filed
Applied Materials,Inc.038222105COM936$240,543dollars as filed
STAG INDUSTRIAL INC85254J102COM6,467$237,727dollars as filed
BEAM THERAPEUTICS INC07373V105COM8,073$223,784dollars as filed

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001177719-26-000005this filing2026-02-11acceptance time not in the bulk data set