MondegarAI
WESTFIELD CAPITAL MANAGEMENT CO LP

Q3 2025 · 13F-HR

WESTFIELD CAPITAL MANAGEMENT CO LPholdings as filed

Filed 2025-11-12 · accession 0001177719-25-000003

$23.83B
Reported value
235
Positions
2025-09-30
Period end
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The Brief · WESTFIELD CAPITAL MANAGEMENT CO LP · Q3 2025

AI · grounded in 13F

WESTFIELD CAPITAL MANAGEMENT CO LP established a new position in NVDA valued at $1.21B. The fund also initiated new stakes in ASNDUSD for $1.05B and MSFT for $883.23M. Additional new positions include AAPL at $849.08M and FIX at $687.54M. Total assets under management stand at $23.83B across 235 positions.

Holdings as filed

CUSIPTickerIssuerValue% port.SharesClassVoting
67066G104NVDANVIDIA CORPORATION$1.21B5.09%6,507,165CommonSOLE
04351P101ASNDUSDASCENDIS PHARMA A/S$1.05B4.39%5,259,909CommonSOLE
594918104MSFTMICROSOFT CORP$883.2M3.71%1,705,236CommonSOLE
037833100AAPLAPPLE INC$849.1M3.56%3,334,545CommonSOLE
199908104FIXCOMFORT SYS USA INC$687.5M2.88%833,195CommonSOLE
30303M102METAMETA PLATFORMS INC$563.8M2.37%767,657CommonSOLE
023135106AMZNAMAZON COM INC$558.1M2.34%2,541,729CommonSOLE
02079K305GOOGLALPHABET INC$545.7M2.29%2,244,650CommonSOLE
05464C101AXONAXON ENTERPRISE INC$523.3M2.20%729,152CommonSOLE
443201108HWMHOWMET AEROSPACE INC$393.9M1.65%2,007,453CommonSOLE
11135F101AVGOBROADCOM INC$384.8M1.61%1,166,362CommonSOLE
G3730V105FTAIFTAI AVIATION LTD$355.5M1.49%2,130,241CommonSOLE
92537N108VRTVERTIV HOLDINGS CO$339.0M1.42%2,247,218CommonSOLE
893641100TDGTRANSDIGM GROUP INC$287.2M1.21%217,897CommonSOLE
876030107TPRTAPESTRY INC$277.5M1.16%2,450,671CommonSOLE
64110L106NFLXNETFLIX INC$276.5M1.16%230,648CommonSOLE
816850101SMTCSEMTECH CORP$241.5M1.01%3,380,373CommonSOLE
92826C839VVISA INC$240.9M1.01%705,767CommonSOLE
81762P102NOWSERVICENOW INC$239.3M1.00%260,002CommonSOLE
573874104MRVLMARVELL TECHNOLOGY INC$219.6M0.92%2,611,958CommonSOLE
532457108LLYELI LILLY & CO$211.4M0.89%277,005CommonSOLE
574795100MASIMASIMO CORP$209.4M0.88%1,419,250CommonSOLE
N5749R1002GHMERUS N V$200.8M0.84%2,132,489CommonSOLE
060505104BACBANK AMERICA CORP$199.2M0.84%3,861,103CommonSOLE
52490G102LEGNLEGEND BIOTECH CORP$198.7M0.83%6,094,486CommonSOLE
053332102AZOAUTOZONE INC$196.4M0.82%45,770CommonSOLE
50212V100LPLALPL FINL HLDGS INC$191.5M0.80%575,462CommonSOLE
88160R101TSLATESLA INC$179.8M0.75%404,220CommonSOLE
758750103RRXREGAL REXNORD CORPORATION$175.2M0.74%1,221,730CommonSOLE
68389X105ORCLORACLE CORP$168.8M0.71%600,197CommonSOLE
771049103RBLXROBLOX CORP$164.8M0.69%1,189,575CommonSOLE
03990B101ARESARES MANAGEMENT CORPORATION$164.3M0.69%1,027,589CommonSOLE
36828A101GEVGE VERNOVA INC$163.4M0.69%265,736CommonSOLE
42226A107HQYHEALTHEQUITY INC$162.7M0.68%1,716,658CommonSOLE
268150109DTDYNATRACE INC$162.1M0.68%3,345,780CommonSOLE
19247G107COHRCOHERENT CORP$158.7M0.67%1,472,963CommonSOLE
147448104CWSTCASELLA WASTE SYS INC$156.4M0.66%1,647,907CommonSOLE
252131107DXCMDEXCOM INC$155.6M0.65%2,312,210CommonSOLE
204166102CVLTCOMMVAULT SYS INC$148.4M0.62%786,175CommonSOLE
74624M102PPURE STORAGE INC$146.8M0.62%1,751,558CommonSOLE
G8068L108SNSHARKNINJA INC$144.6M0.61%1,402,297CommonSOLE
093712107BEBLOOM ENERGY CORP$141.7M0.59%1,675,282CommonSOLE
79589L106IOTSAMSARA INC$141.6M0.59%3,801,787CommonSOLE
92243G108PCVXVAXCYTE INC$134.5M0.56%3,732,715CommonSOLE
M7S64H106MNDYMONDAY COM LTD$134.3M0.56%693,319CommonSOLE
874039100TSMTAIWAN SEMICONDUCTOR MFG LTD$130.5M0.55%467,398CommonSOLE
74164F103PRIMPRIMORIS SVCS CORP$130.1M0.55%947,308CommonSOLE
833445109SNOWSNOWFLAKE INC$129.7M0.54%574,955CommonSOLE
76155X100RVMDREVOLUTION MEDICINES INC$117.4M0.49%2,513,967CommonSOLE
773121108RKLBROCKET LAB CORP$116.8M0.49%2,437,820CommonSOLE
74275K108PCORPROCORE TECHNOLOGIES INC$112.3M0.47%1,540,265CommonSOLE
69608A108PLTRPALANTIR TECHNOLOGIES INC$110.6M0.46%606,450CommonSOLE
77543R102ROKUROKU INC$110.4M0.46%1,102,488CommonSOLE
V7780T103RCLROYAL CARIBBEAN GROUP$108.9M0.46%336,512CommonSOLE
460146103IPINTERNATIONAL PAPER CO$108.6M0.46%2,341,336CommonNONE
76243J105RYTMRHYTHM PHARMACEUTICALS INC$108.0M0.45%1,069,004CommonSOLE
25809K105DASHDOORDASH INC$107.1M0.45%393,628CommonSOLE
538034109LYVLIVE NATION ENTERTAINMENT IN$105.6M0.44%646,370CommonSOLE
422806208HEI/AHEICO CORP NEW$104.0M0.44%409,498CommonSOLE
65290E101NXTNEXTRACKER INC$103.4M0.43%1,398,057CommonSOLE
18915M107NETCLOUDFLARE INC$103.2M0.43%480,850CommonSOLE
485924104KRMNKARMAN HLDGS INC$102.9M0.43%1,425,576CommonSOLE
M2029K104BIRKBIRKENSTOCK HOLDING PLC$102.0M0.43%2,254,493CommonSOLE
03073E105CORCENCORA INC$101.8M0.43%325,660CommonSOLE
74762E102QUREQUANTA SVCS INC$101.7M0.43%245,506CommonSOLE
45073V108ITTITT INC$101.5M0.43%568,027CommonSOLE
377322102GKOSGLAUKOS CORP$100.4M0.42%1,231,641CommonSOLE
55354G100MSCIMSCI INC$99.5M0.42%175,347CommonSOLE
89400J107TRUTRANSUNION$98.9M0.41%1,180,154CommonSOLE
92840M102VSTVISTRA CORP$96.5M0.40%492,560CommonSOLE
249906108DSGXDESCARTES SYS GROUP INC$94.4M0.40%1,001,331CommonSOLE
632307104NTRANATERA INC$92.7M0.39%575,802CommonSOLE
50077B207KTOSKRATOS DEFENSE & SEC SOLUTIO$91.9M0.39%1,005,816CommonSOLE
983793100XPOXPO INC$89.8M0.38%694,714CommonSOLE
67103H107ORLYOREILLY AUTOMOTIVE INC$88.1M0.37%817,026CommonSOLE
89055F103BLDTOPBUILD CORP$88.0M0.37%225,029CommonSOLE
48251W104KKRKKR & CO INC$87.4M0.37%672,895CommonSOLE
69753M105PLMRPALOMAR HLDGS INC$86.2M0.36%738,528CommonSOLE
22160K105COSTCOSTCO WHSL CORP NEW$85.3M0.36%92,163CommonSOLE
493267108KEYKEYCORP$83.7M0.35%4,480,214CommonSOLE
441593100HLIHOULIHAN LOKEY INC$83.4M0.35%406,306CommonSOLE
91324P102UNHUNITEDHEALTH GROUP INC$83.2M0.35%241,010CommonSOLE
363576109AJGGALLAGHER ARTHUR J & CO$82.9M0.35%267,709CommonSOLE
26142V105DKNGDRAFTKINGS INC NEW$77.8M0.33%2,080,438CommonSOLE
01644J108ALKTALKAMI TECHNOLOGY INC$76.9M0.32%3,095,058CommonSOLE
68404L201OPCHOPTION CARE HEALTH INC$76.6M0.32%2,757,858CommonSOLE
697435105PANWPALO ALTO NETWORKS INC$75.4M0.32%370,359CommonSOLE
000899104ADMAADMA BIOLOGICS INC$74.9M0.31%5,106,802CommonSOLE
12008R107BLDRBUILDERS FIRSTSOURCE INC$74.7M0.31%616,032CommonSOLE
983134107WYNNWYNN RESORTS LTD$73.6M0.31%573,694CommonSOLE
12541W209CHRWC H ROBINSON WORLDWIDE INC$72.9M0.31%550,825CommonSOLE
929160109VMCVULCAN MATLS CO$72.8M0.31%236,556CommonSOLE
G3934V109GENIGENIUS SPORTS LIMITED$72.4M0.30%5,850,083CommonSOLE
316773100FITBFIFTH THIRD BANCORP$72.2M0.30%1,619,948CommonSOLE
78351F107RYANRYAN SPECIALTY HOLDINGS INC$72.0M0.30%1,278,134CommonSOLE
09581B103OWLBLUE OWL CAPITAL INC$71.6M0.30%4,228,444CommonSOLE
773903109ROKROCKWELL AUTOMATION INC$71.4M0.30%204,335CommonSOLE
74164M108PRIPRIMERICA INC$71.3M0.30%256,774CommonSOLE
74276L105PRCTPROCEPT BIOROBOTICS CORP$70.3M0.30%1,970,147CommonSOLE
457669307INSMINSMED INC$70.3M0.29%487,927CommonSOLE
75700L108RRRRED ROCK RESORTS INC$70.1M0.29%1,147,417CommonSOLE
G4705A100ICLRICON PLC$69.4M0.29%396,354CommonSOLE
G25457105CRDOCREDO TECHNOLOGY GROUP HOLDI$68.9M0.29%472,841CommonSOLE
78709Y105SAIASAIA INC$68.2M0.29%227,908CommonSOLE
74967X103RHRH$67.6M0.28%332,901CommonSOLE
031100100AMEAMETEK INC$67.4M0.28%358,660CommonSOLE
33768G107FCFSFIRSTCASH HOLDINGS INC$66.9M0.28%422,455CommonSOLE
533900106LECOLINCOLN ELEC HLDGS INC$66.7M0.28%282,963CommonSOLE
72352L106PINSPINTEREST INC$65.1M0.27%2,023,270CommonSOLE
922475108VEEVVEEVA SYS INC$64.9M0.27%217,754CommonSOLE
45167R104IEXIDEX CORP$64.8M0.27%398,283CommonSOLE
45866F104ICEINTERCONTINENTAL EXCHANGE IN$63.8M0.27%378,565CommonSOLE
443573100HUBSHUBSPOT INC$62.8M0.26%134,175CommonSOLE
27579R104EWBCEAST WEST BANCORP INC$62.8M0.26%589,535CommonSOLE
871607107SNPSSYNOPSYS INC$62.5M0.26%126,581CommonSOLE
45784P101PODDINSULET CORP$62.2M0.26%201,387CommonSOLE
10576N102BRZEBRAZE INC$61.9M0.26%2,177,953CommonSOLE
37959E102GLGLOBE LIFE INC$61.6M0.26%430,642CommonSOLE
683344105ONTOONTO INNOVATION INC$61.3M0.26%474,530CommonSOLE
03820C105AITAPPLIED INDL TECHNOLOGIES IN$61.3M0.26%234,734CommonSOLE
834203309SLNOSOLENO THERAPEUTICS INC$60.8M0.26%899,157CommonSOLE
43300A203HLTHILTON WORLDWIDE HLDGS INC$60.6M0.25%233,718CommonSOLE
97650W108WTFCWINTRUST FINL CORP$60.5M0.25%456,964CommonSOLE
49714P108KNSLKINSALE CAP GROUP INC$60.4M0.25%142,146CommonSOLE
45168D104IDXXIDEXX LABS INC$60.1M0.25%94,129CommonSOLE
G3323L100FNFABRINET$59.4M0.25%163,002CommonSOLE
90138F102TWLOTWILIO INC$59.2M0.25%591,367CommonSOLE
L8681T102SPOTSPOTIFY TECHNOLOGY S A$58.6M0.25%84,006CommonSOLE
81663L200WGSGENEDX HOLDINGS CORP$58.6M0.25%544,094CommonSOLE
G87110105FTITECHNIPFMC PLC$58.4M0.24%1,480,110CommonSOLE
466313103JBLJABIL INC$57.8M0.24%266,147CommonSOLE
87305R109TTMITTM TECHNOLOGIES INC$57.3M0.24%994,282CommonSOLE
184496107CLHCLEAN HARBORS INC$56.6M0.24%243,582CommonSOLE
126408103CSXCSX CORP$56.6M0.24%1,592,570CommonSOLE
60937P106MDBMONGODB INC$56.3M0.24%181,314CommonSOLE
450056106IRTCIRHYTHM TECHNOLOGIES INC$55.7M0.23%323,980CommonSOLE
55405Y100MTSIMACOM TECH SOLUTIONS HLDGS I$54.3M0.23%436,496CommonSOLE
45245E109IMAXIMAX CORP$53.1M0.22%1,622,625CommonSOLE
109641100EATBRINKER INTL INC$52.7M0.22%416,056CommonSOLE
122017106BURLBURLINGTON STORES INC$52.4M0.22%205,895CommonSOLE
87422Q109TLNTALEN ENERGY CORP$52.4M0.22%123,078CommonSOLE
05368V106AVNTAVIENT CORPORATION$51.7M0.22%1,569,226CommonSOLE
049468101TEAMATLASSIAN CORPORATION$51.5M0.22%322,438CommonSOLE
00827B106AFRMAFFIRM HLDGS INC$51.3M0.22%701,607CommonSOLE
518415104LSCCLATTICE SEMICONDUCTOR CORP$51.1M0.21%696,706CommonSOLE
85914M107STEPSTEPSTONE GROUP INC$50.9M0.21%778,728CommonSOLE
94106B101WCNWASTE CONNECTIONS INC$50.8M0.21%288,730CommonSOLE
82452J109FOURSHIFT4 PMTS INC$50.6M0.21%653,828CommonSOLE
750917106RMBSRAMBUS INC DEL$50.5M0.21%484,465CommonSOLE
303250104FICOFAIR ISAAC CORP$48.6M0.20%32,468CommonSOLE
98420N105XENEXENON PHARMACEUTICALS INC$48.4M0.20%1,206,066CommonSOLE
282559103ETNBGBP89BIO INC$48.4M0.20%3,291,369CommonSOLE
302520101FNBF N B CORP$48.1M0.20%2,985,673CommonSOLE
665531307NOGNORTHERN OIL & GAS INC$47.1M0.20%1,899,017CommonSOLE
25278X109FANGDIAMONDBACK ENERGY INC$45.7M0.19%319,664CommonSOLE
92846Q107COCOVITA COCO CO INC$45.1M0.19%1,062,761CommonSOLE
826919102SLABSILICON LABORATORIES INC$44.9M0.19%342,310CommonSOLE
090572207BIOBIO RAD LABS INC$43.6M0.18%155,524CommonSOLE
971378104WSCWILLSCOT HLDGS CORP$43.3M0.18%2,049,820CommonSOLE
71424F105PRPERMIAN RESOURCES CORP$43.0M0.18%3,357,716CommonSOLE
29362U104ENTGENTEGRIS INC$42.6M0.18%460,440CommonSOLE
13100M509CALXCALIX INC$42.0M0.18%684,096CommonSOLE
G63755105NIQNIQ GLOBAL INTELLIGENCE PLC$41.3M0.17%2,631,896CommonSOLE
770700102HOODROBINHOOD MKTS INC$41.2M0.17%287,615CommonSOLE
02043Q107ALNYALNYLAM PHARMACEUTICALS INC$40.1M0.17%87,908CommonSOLE
750491102RDNTRADNET INC$40.1M0.17%525,820CommonSOLE
55306N104MKSIMKS INC.$40.0M0.17%323,364CommonSOLE
445658107JBHTHUNT J B TRANS SVCS INC$39.8M0.17%296,843CommonSOLE
50155Q100KDKYNDRYL HLDGS INC$39.5M0.17%1,315,656CommonSOLE
888787108TOSTTOAST INC$37.8M0.16%1,034,305CommonSOLE
04626A103ALABASTERA LABS INC$37.7M0.16%192,614CommonSOLE
346375108FORMFORMFACTOR INC$37.4M0.16%1,026,657CommonSOLE
21874A106CORZCORE SCIENTIFIC INC NEW$35.7M0.15%1,992,735CommonSOLE
87612G101TRGPTARGA RES CORP$30.6M0.13%182,426CommonSOLE
05589G102BWINTHE BALDWIN INSURANCE GRP IN$30.2M0.13%1,071,136CommonSOLE
78473E103SPXCSPX TECHNOLOGIES INC$27.2M0.11%145,699CommonSOLE
767292105RIOTRIOT PLATFORMS INC$25.7M0.11%1,350,027CommonSOLE
088786108BCYCBICYCLE THERAPEUTICS PLC$22.9M0.10%2,952,543CommonSOLE
46222L108IONQIONQ INC$22.6M0.09%367,667CommonSOLE
M22465104CHKPCHECK POINT SOFTWARE TECH LT$20.6M0.09%99,472CommonSOLE
N6596X109NXPINXP SEMICONDUCTORS N V$20.5M0.09%89,996CommonSOLE
86800U302SMCISUPER MICRO COMPUTER INC$17.2M0.07%359,439CommonSOLE
70339W104PTRNPATTERN GROUP INC$15.6M0.07%1,135,879CommonSOLE
624756102MLIMUELLER INDS INC$12.9M0.05%127,835CommonSOLE
969457100WMBWILLIAMS COS INC$12.7M0.05%201,065CommonSOLE
02079K107GOOGALPHABET INC$9.9M0.04%40,663CommonSOLE
191216100KOCOCA COLA CO$9.0M0.04%135,745CommonSOLE
172908105CTASCINTAS CORP$8.9M0.04%43,259CommonSOLE
606822104MUFGMITSUBISHI UFJ FINL GROUP IN$8.2M0.03%517,229CommonSOLE
86562M209SMFGSUMITOMO MITSUI FINL GROUP I$7.7M0.03%459,467CommonSOLE
949746101WMT2WELLS FARGO CO NEW$7.4M0.03%88,176CommonSOLE
872540109TJXTJX COS INC NEW$7.2M0.03%49,961CommonSOLE
03076C106AMPAMERIPRISE FINL INC$7.2M0.03%14,691CommonSOLE
754730109RJFRAYMOND JAMES FINL INC$6.9M0.03%40,095CommonSOLE
G8994E103TTTRANE TECHNOLOGIES PLC$6.7M0.03%15,916CommonSOLE
931142103WMTWALMART INC$6.7M0.03%64,902CommonSOLE
883556102TMOTHERMO FISHER SCIENTIFIC INC$6.6M0.03%13,681CommonSOLE
55261F104MTBM & T BK CORP$6.0M0.03%30,525CommonSOLE
775711104ROLROLLINS INC$5.9M0.02%100,660CommonSOLE
G5960L103MDTMEDTRONIC PLC$5.9M0.02%61,922CommonSOLE
85254J102STAGSTAG INDL INC$5.9M0.02%166,199CommonSOLE
95040Q104WELLWELLTOWER INC$5.7M0.02%32,189CommonSOLE
31946M103FCNCAFIRST CTZNS BANCSHARES INC D$5.7M0.02%3,185CommonSOLE
38141G104GSGOLDMAN SACHS GROUP INC$5.7M0.02%7,128CommonSOLE
427866108HSYHERSHEY CO$5.5M0.02%29,288CommonSOLE
701094104PHPARKER-HANNIFIN CORP$5.4M0.02%7,172CommonSOLE
65339F101NEENEXTERA ENERGY INC$5.3M0.02%70,506CommonSOLE
14149Y108CAHCARDINAL HEALTH INC$5.3M0.02%33,769CommonSOLE
315616102FFIVF5 INC$5.2M0.02%16,220CommonSOLE
58155Q103MCKMCKESSON CORP$5.2M0.02%6,732CommonSOLE
12572Q105CMECME GROUP INC$5.1M0.02%18,841CommonSOLE
171779309CIENCIENA CORP$4.6M0.02%31,750CommonSOLE
501044101KRKROGER CO$4.3M0.02%63,932CommonSOLE
94106L109WMWASTE MGMT INC DEL$4.1M0.02%18,777CommonSOLE
366651107ITGARTNER INC$3.8M0.02%14,375CommonSOLE
30212P303EXPEEXPEDIA GROUP INC$3.6M0.02%16,799CommonSOLE
437076102HDHOME DEPOT INC$2.4M0.01%6,017CommonSOLE
75321W103PACKRANPAK HOLDINGS CORP$2.3M0.01%407,328CommonSOLE
565394103CARTMAPLEBEAR INC$1.9M0.01%51,381CommonSOLE
00287Y109ABBVABBVIE INC$1.8M0.01%7,928CommonSOLE
084670702BRK/BBERKSHIRE HATHAWAY INC DEL$1.2M0.00%2,350CommonSOLE
09857L108BKNGBOOKING HOLDINGS INC$1.1M0.00%210CommonSOLE
235851102DHRDANAHER CORPORATION$981,9820.00%4,953CommonSOLE
459200101IBMINTERNATIONAL BUSINESS MACHS$936,7710.00%3,320CommonSOLE
03831W108APPAPPLOVIN CORP$922,6180.00%1,284CommonSOLE
729132100PLXSPLEXUS CORP$752,3880.00%5,200CommonSOLE
101137107BSXBOSTON SCIENTIFIC CORP$741,2070.00%7,592CommonSOLE
58733R102MELIMERCADOLIBRE INC$731,4620.00%313CommonSOLE
46428Q109SLVISHARES SILVER TR$710,1210.00%16,760CommonSOLE
200340107CMACOMERICA INC$586,5310.00%8,560CommonSOLE
26884L109EQTEQT CORP$579,1350.00%10,640CommonSOLE
36266G107GEHCGE HEALTHCARE TECHNOLOGIES I$324,6110.00%4,322CommonNONE
N90064101QUREUNIQURE NV$223,4400.00%3,828CommonSOLE
464287481IWPISHARES TR$205,2370.00%1,441CommonSOLE
462222100IONSIONIS PHARMACEUTICALS INC$202,3440.00%3,093CommonSOLE

Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.