13F HOLDINGS REPORT
WESTFIELD CAPITAL MANAGEMENT CO LP
Quarter ended Q3 2025 · Filed November 12, 2025 · Accession 0001177719-25-000003
Total Value
$23.83B
Positions
235
Other Managers
0
Confidential Omitted
No
Holdings (235)
| # | Issuer | Ticker / CUSIP | Shares | Value | % of Filing |
|---|---|---|---|---|---|
| 1 | NVIDIA CORPORATION | NVDA | 6,507,165 | $1.21B | 5.09% |
| 2 | ASCENDIS PHARMA A/S | ASND | 5,259,909 | $1.05B | 4.39% |
| 3 | MICROSOFT CORP | MSFT | 1,705,236 | $883.2M | 3.71% |
| 4 | APPLE INC | AAPL | 3,334,545 | $849.1M | 3.56% |
| 5 | COMFORT SYS USA INC | 199908104 | 833,195 | $687.5M | 2.88% |
| 6 | META PLATFORMS INC | META | 767,657 | $563.8M | 2.37% |
| 7 | AMAZON COM INC | AMZN | 2,541,729 | $558.1M | 2.34% |
| 8 | ALPHABET INC | GOOG | 2,244,650 | $545.7M | 2.29% |
| 9 | AXON ENTERPRISE INC | AXON | 729,152 | $523.3M | 2.20% |
| 10 | HOWMET AEROSPACE INC | HWM | 2,007,453 | $393.9M | 1.65% |
| 11 | BROADCOM INC | AVGO | 1,166,362 | $384.8M | 1.61% |
| 12 | FTAI AVIATION LTD | FTAIN | 2,130,241 | $355.5M | 1.49% |
| 13 | VERTIV HOLDINGS CO | VRT | 2,247,218 | $339.0M | 1.42% |
| 14 | TRANSDIGM GROUP INC | TDG | 217,897 | $287.2M | 1.21% |
| 15 | TAPESTRY INC | TPR | 2,450,671 | $277.5M | 1.16% |
| 16 | NETFLIX INC | NFLX | 230,648 | $276.5M | 1.16% |
| 17 | SEMTECH CORP | SMTC | 3,380,373 | $241.5M | 1.01% |
| 18 | VISA INC | V | 705,767 | $240.9M | 1.01% |
| 19 | SERVICENOW INC | NOW | 260,002 | $239.3M | 1.00% |
| 20 | MARVELL TECHNOLOGY INC | MRVL | 2,611,958 | $219.6M | 0.92% |
| 21 | ELI LILLY & CO | LLY | 277,005 | $211.4M | 0.89% |
| 22 | MASIMO CORP | MASI | 1,419,250 | $209.4M | 0.88% |
| 23 | MERUS N V | N5749R100 | 2,132,489 | $200.8M | 0.84% |
| 24 | BANK AMERICA CORP | 060505104 | 3,861,103 | $199.2M | 0.84% |
| 25 | LEGEND BIOTECH CORP | LEGN | 6,094,486 | $198.7M | 0.83% |
| 26 | AUTOZONE INC | AZO | 45,770 | $196.4M | 0.82% |
| 27 | LPL FINL HLDGS INC | 50212V100 | 575,462 | $191.5M | 0.80% |
| 28 | TESLA INC | TSLA | 404,220 | $179.8M | 0.75% |
| 29 | REGAL REXNORD CORPORATION | RRX | 1,221,730 | $175.2M | 0.74% |
| 30 | ORACLE CORP | ORCL-PD | 600,197 | $168.8M | 0.71% |
| 31 | ROBLOX CORP | RBLX | 1,189,575 | $164.8M | 0.69% |
| 32 | ARES MANAGEMENT CORPORATION | ARES-PB | 1,027,589 | $164.3M | 0.69% |
| 33 | GE VERNOVA INC | GEV | 265,736 | $163.4M | 0.69% |
| 34 | HEALTHEQUITY INC | HQY | 1,716,658 | $162.7M | 0.68% |
| 35 | DYNATRACE INC | DT | 3,345,780 | $162.1M | 0.68% |
| 36 | COHERENT CORP | COHR | 1,472,963 | $158.7M | 0.67% |
| 37 | CASELLA WASTE SYS INC | CWST | 1,647,907 | $156.4M | 0.66% |
| 38 | DEXCOM INC | DXCM | 2,312,210 | $155.6M | 0.65% |
| 39 | COMMVAULT SYS INC | CVLT | 786,175 | $148.4M | 0.62% |
| 40 | PURE STORAGE INC | 74624M102 | 1,751,558 | $146.8M | 0.62% |
| 41 | SHARKNINJA INC | SN | 1,402,297 | $144.6M | 0.61% |
| 42 | BLOOM ENERGY CORP | BE | 1,675,282 | $141.7M | 0.59% |
| 43 | SAMSARA INC | IOT | 3,801,787 | $141.6M | 0.59% |
| 44 | VAXCYTE INC | PCVX | 3,732,715 | $134.5M | 0.56% |
| 45 | MONDAY COM LTD | MNDY | 693,319 | $134.3M | 0.56% |
| 46 | TAIWAN SEMICONDUCTOR MFG LTD | 874039100 | 467,398 | $130.5M | 0.55% |
| 47 | PRIMORIS SVCS CORP | 74164F103 | 947,308 | $130.1M | 0.55% |
| 48 | SNOWFLAKE INC | SNOW | 574,955 | $129.7M | 0.54% |
| 49 | REVOLUTION MEDICINES INC | RVMDW | 2,513,967 | $117.4M | 0.49% |
| 50 | ROCKET LAB CORP | RKLB | 2,437,820 | $116.8M | 0.49% |
| 51 | PROCORE TECHNOLOGIES INC | PCOR | 1,540,265 | $112.3M | 0.47% |
| 52 | PALANTIR TECHNOLOGIES INC | PLTR | 606,450 | $110.6M | 0.46% |
| 53 | ROKU INC | ROKU | 1,102,488 | $110.4M | 0.46% |
| 54 | ROYAL CARIBBEAN GROUP | V7780T103 | 336,512 | $108.9M | 0.46% |
| 55 | INTERNATIONAL PAPER CO | 460146103 | 2,341,336 | $108.6M | 0.46% |
| 56 | RHYTHM PHARMACEUTICALS INC | RYTM | 1,069,004 | $108.0M | 0.45% |
| 57 | DOORDASH INC | DASH | 393,628 | $107.1M | 0.45% |
| 58 | LIVE NATION ENTERTAINMENT IN | LYV | 646,370 | $105.6M | 0.44% |
| 59 | HEICO CORP NEW | HEI-A | 409,498 | $104.0M | 0.44% |
| 60 | NEXTRACKER INC | NXT | 1,398,057 | $103.4M | 0.43% |
| 61 | CLOUDFLARE INC | NET | 480,850 | $103.2M | 0.43% |
| 62 | KARMAN HLDGS INC | KRMN | 1,425,576 | $102.9M | 0.43% |
| 63 | BIRKENSTOCK HOLDING PLC | BIRK | 2,254,493 | $102.0M | 0.43% |
| 64 | CENCORA INC | COR | 325,660 | $101.8M | 0.43% |
| 65 | QUANTA SVCS INC | 74762E102 | 245,506 | $101.7M | 0.43% |
| 66 | ITT INC | ITT | 568,027 | $101.5M | 0.43% |
| 67 | GLAUKOS CORP | GKOS | 1,231,641 | $100.4M | 0.42% |
| 68 | MSCI INC | MSCI | 175,347 | $99.5M | 0.42% |
| 69 | TRANSUNION | TRU | 1,180,154 | $98.9M | 0.41% |
| 70 | VISTRA CORP | VST | 492,560 | $96.5M | 0.40% |
| 71 | DESCARTES SYS GROUP INC | 249906108 | 1,001,331 | $94.4M | 0.40% |
| 72 | NATERA INC | NTRA | 575,802 | $92.7M | 0.39% |
| 73 | KRATOS DEFENSE & SEC SOLUTIO | 50077B207 | 1,005,816 | $91.9M | 0.39% |
| 74 | XPO INC | XPO | 694,714 | $89.8M | 0.38% |
| 75 | OREILLY AUTOMOTIVE INC | 67103H107 | 817,026 | $88.1M | 0.37% |
| 76 | TOPBUILD CORP | BLD | 225,029 | $88.0M | 0.37% |
| 77 | KKR & CO INC | KKRT | 672,895 | $87.4M | 0.37% |
| 78 | PALOMAR HLDGS INC | PLMR | 738,528 | $86.2M | 0.36% |
| 79 | COSTCO WHSL CORP NEW | 22160K105 | 92,163 | $85.3M | 0.36% |
| 80 | KEYCORP | 493267108 | 4,480,214 | $83.7M | 0.35% |
| 81 | HOULIHAN LOKEY INC | HLI | 406,306 | $83.4M | 0.35% |
| 82 | UNITEDHEALTH GROUP INC | UNH | 241,010 | $83.2M | 0.35% |
| 83 | GALLAGHER ARTHUR J & CO | 363576109 | 267,709 | $82.9M | 0.35% |
| 84 | DRAFTKINGS INC NEW | DKNG | 2,080,438 | $77.8M | 0.33% |
| 85 | ALKAMI TECHNOLOGY INC | ALKT | 3,095,058 | $76.9M | 0.32% |
| 86 | OPTION CARE HEALTH INC | OPCH | 2,757,858 | $76.6M | 0.32% |
| 87 | PALO ALTO NETWORKS INC | PANW | 370,359 | $75.4M | 0.32% |
| 88 | ADMA BIOLOGICS INC | ADMA | 5,106,802 | $74.9M | 0.31% |
| 89 | BUILDERS FIRSTSOURCE INC | BLDR | 616,032 | $74.7M | 0.31% |
| 90 | WYNN RESORTS LTD | WYNN | 573,694 | $73.6M | 0.31% |
| 91 | C H ROBINSON WORLDWIDE INC | CHRW | 550,825 | $72.9M | 0.31% |
| 92 | VULCAN MATLS CO | 929160109 | 236,556 | $72.8M | 0.31% |
| 93 | GENIUS SPORTS LIMITED | GENI | 5,850,083 | $72.4M | 0.30% |
| 94 | FIFTH THIRD BANCORP | FITBM | 1,619,948 | $72.2M | 0.30% |
| 95 | RYAN SPECIALTY HOLDINGS INC | RYAN | 1,278,134 | $72.0M | 0.30% |
| 96 | BLUE OWL CAPITAL INC | OWL | 4,228,444 | $71.6M | 0.30% |
| 97 | ROCKWELL AUTOMATION INC | ROK | 204,335 | $71.4M | 0.30% |
| 98 | PRIMERICA INC | PRI | 256,774 | $71.3M | 0.30% |
| 99 | PROCEPT BIOROBOTICS CORP | PRCT | 1,970,147 | $70.3M | 0.30% |
| 100 | INSMED INC | INSM | 487,927 | $70.3M | 0.29% |
| 101 | RED ROCK RESORTS INC | RRR | 1,147,417 | $70.1M | 0.29% |
| 102 | ICON PLC | ICLR | 396,354 | $69.4M | 0.29% |
| 103 | CREDO TECHNOLOGY GROUP HOLDI | CRDO | 472,841 | $68.9M | 0.29% |
| 104 | SAIA INC | SAIA | 227,908 | $68.2M | 0.29% |
| 105 | RH | RH | 332,901 | $67.6M | 0.28% |
| 106 | AMETEK INC | AME | 358,660 | $67.4M | 0.28% |
| 107 | FIRSTCASH HOLDINGS INC | FCFS | 422,455 | $66.9M | 0.28% |
| 108 | LINCOLN ELEC HLDGS INC | 533900106 | 282,963 | $66.7M | 0.28% |
| 109 | PINTEREST INC | PINS | 2,023,270 | $65.1M | 0.27% |
| 110 | VEEVA SYS INC | VEEV | 217,754 | $64.9M | 0.27% |
| 111 | IDEX CORP | 45167R104 | 398,283 | $64.8M | 0.27% |
| 112 | INTERCONTINENTAL EXCHANGE IN | 45866F104 | 378,565 | $63.8M | 0.27% |
| 113 | HUBSPOT INC | HUBS | 134,175 | $62.8M | 0.26% |
| 114 | EAST WEST BANCORP INC | EWBC | 589,535 | $62.8M | 0.26% |
| 115 | SYNOPSYS INC | SNPS | 126,581 | $62.5M | 0.26% |
| 116 | INSULET CORP | PODD | 201,387 | $62.2M | 0.26% |
| 117 | BRAZE INC | BRZE | 2,177,953 | $61.9M | 0.26% |
| 118 | GLOBE LIFE INC | GL-PD | 430,642 | $61.6M | 0.26% |
| 119 | ONTO INNOVATION INC | ONTO | 474,530 | $61.3M | 0.26% |
| 120 | APPLIED INDL TECHNOLOGIES IN | 03820C105 | 234,734 | $61.3M | 0.26% |
| 121 | SOLENO THERAPEUTICS INC | SLNO | 899,157 | $60.8M | 0.26% |
| 122 | HILTON WORLDWIDE HLDGS INC | HLT | 233,718 | $60.6M | 0.25% |
| 123 | WINTRUST FINL CORP | 97650W108 | 456,964 | $60.5M | 0.25% |
| 124 | KINSALE CAP GROUP INC | 49714P108 | 142,146 | $60.4M | 0.25% |
| 125 | IDEXX LABS INC | 45168D104 | 94,129 | $60.1M | 0.25% |
| 126 | FABRINET | FN | 163,002 | $59.4M | 0.25% |
| 127 | TWILIO INC | TWLO | 591,367 | $59.2M | 0.25% |
| 128 | SPOTIFY TECHNOLOGY S A | SPOT | 84,006 | $58.6M | 0.25% |
| 129 | GENEDX HOLDINGS CORP | WGSWW | 544,094 | $58.6M | 0.25% |
| 130 | TECHNIPFMC PLC | FTI | 1,480,110 | $58.4M | 0.24% |
| 131 | JABIL INC | JBL | 266,147 | $57.8M | 0.24% |
| 132 | TTM TECHNOLOGIES INC | TTMI | 994,282 | $57.3M | 0.24% |
| 133 | CLEAN HARBORS INC | CLH | 243,582 | $56.6M | 0.24% |
| 134 | CSX CORP | CSX | 1,592,570 | $56.6M | 0.24% |
| 135 | MONGODB INC | MDB | 181,314 | $56.3M | 0.24% |
| 136 | IRHYTHM TECHNOLOGIES INC | IRTC | 323,980 | $55.7M | 0.23% |
| 137 | MACOM TECH SOLUTIONS HLDGS I | 55405Y100 | 436,496 | $54.3M | 0.23% |
| 138 | IMAX CORP | IMAX | 1,622,625 | $53.1M | 0.22% |
| 139 | BRINKER INTL INC | 109641100 | 416,056 | $52.7M | 0.22% |
| 140 | BURLINGTON STORES INC | BURL | 205,895 | $52.4M | 0.22% |
| 141 | TALEN ENERGY CORP | TLN | 123,078 | $52.4M | 0.22% |
| 142 | AVIENT CORPORATION | AVNT | 1,569,226 | $51.7M | 0.22% |
| 143 | ATLASSIAN CORPORATION | TEAM | 322,438 | $51.5M | 0.22% |
| 144 | AFFIRM HLDGS INC | AFRM | 701,607 | $51.3M | 0.22% |
| 145 | LATTICE SEMICONDUCTOR CORP | LSCC | 696,706 | $51.1M | 0.21% |
| 146 | STEPSTONE GROUP INC | STEP | 778,728 | $50.9M | 0.21% |
| 147 | WASTE CONNECTIONS INC | WCN | 288,730 | $50.8M | 0.21% |
| 148 | SHIFT4 PMTS INC | 82452J109 | 653,828 | $50.6M | 0.21% |
| 149 | RAMBUS INC DEL | RMBS | 484,465 | $50.5M | 0.21% |
| 150 | FAIR ISAAC CORP | FICO | 32,468 | $48.6M | 0.20% |
| 151 | XENON PHARMACEUTICALS INC | XENE | 1,206,066 | $48.4M | 0.20% |
| 152 | 89BIO INC | 282559103 | 3,291,369 | $48.4M | 0.20% |
| 153 | F N B CORP | 302520101 | 2,985,673 | $48.1M | 0.20% |
| 154 | NORTHERN OIL & GAS INC | NOG | 1,899,017 | $47.1M | 0.20% |
| 155 | DIAMONDBACK ENERGY INC | FANG | 319,664 | $45.7M | 0.19% |
| 156 | VITA COCO CO INC | COCO | 1,062,761 | $45.1M | 0.19% |
| 157 | SILICON LABORATORIES INC | SLAB | 342,310 | $44.9M | 0.19% |
| 158 | BIO RAD LABS INC | 090572207 | 155,524 | $43.6M | 0.18% |
| 159 | WILLSCOT HLDGS CORP | WSC | 2,049,820 | $43.3M | 0.18% |
| 160 | PERMIAN RESOURCES CORP | PR | 3,357,716 | $43.0M | 0.18% |
| 161 | ENTEGRIS INC | ENTG | 460,440 | $42.6M | 0.18% |
| 162 | CALIX INC | CALX | 684,096 | $42.0M | 0.18% |
| 163 | NIQ GLOBAL INTELLIGENCE PLC | NIQ | 2,631,896 | $41.3M | 0.17% |
| 164 | ROBINHOOD MKTS INC | 770700102 | 287,615 | $41.2M | 0.17% |
| 165 | ALNYLAM PHARMACEUTICALS INC | ALNY | 87,908 | $40.1M | 0.17% |
| 166 | RADNET INC | RDNT | 525,820 | $40.1M | 0.17% |
| 167 | MKS INC. | MKSI | 323,364 | $40.0M | 0.17% |
| 168 | HUNT J B TRANS SVCS INC | 445658107 | 296,843 | $39.8M | 0.17% |
| 169 | KYNDRYL HLDGS INC | KD | 1,315,656 | $39.5M | 0.17% |
| 170 | TOAST INC | TOST | 1,034,305 | $37.8M | 0.16% |
| 171 | ASTERA LABS INC | ALAB | 192,614 | $37.7M | 0.16% |
| 172 | FORMFACTOR INC | FORM | 1,026,657 | $37.4M | 0.16% |
| 173 | CORE SCIENTIFIC INC NEW | 21874A106 | 1,992,735 | $35.7M | 0.15% |
| 174 | TARGA RES CORP | TRGP | 182,426 | $30.6M | 0.13% |
| 175 | THE BALDWIN INSURANCE GRP IN | 05589G102 | 1,071,136 | $30.2M | 0.13% |
| 176 | SPX TECHNOLOGIES INC | SPXC | 145,699 | $27.2M | 0.11% |
| 177 | RIOT PLATFORMS INC | RIOT | 1,350,027 | $25.7M | 0.11% |
| 178 | BICYCLE THERAPEUTICS PLC | BCYC | 2,952,543 | $22.9M | 0.10% |
| 179 | IONQ INC | IONQ-WT | 367,667 | $22.6M | 0.09% |
| 180 | CHECK POINT SOFTWARE TECH LT | M22465104 | 99,472 | $20.6M | 0.09% |
| 181 | NXP SEMICONDUCTORS N V | NXPI | 89,996 | $20.5M | 0.09% |
| 182 | SUPER MICRO COMPUTER INC | SMCI | 359,439 | $17.2M | 0.07% |
| 183 | PATTERN GROUP INC | PTRN | 1,135,879 | $15.6M | 0.07% |
| 184 | MUELLER INDS INC | 624756102 | 127,835 | $12.9M | 0.05% |
| 185 | WILLIAMS COS INC | 969457100 | 201,065 | $12.7M | 0.05% |
| 186 | ALPHABET INC | GOOG | 40,663 | $9.9M | 0.04% |
| 187 | COCA COLA CO | KO | 135,745 | $9.0M | 0.04% |
| 188 | CINTAS CORP | CTAS | 43,259 | $8.9M | 0.04% |
| 189 | MITSUBISHI UFJ FINL GROUP IN | 606822104 | 517,229 | $8.2M | 0.03% |
| 190 | SUMITOMO MITSUI FINL GROUP I | 86562M209 | 459,467 | $7.7M | 0.03% |
| 191 | WELLS FARGO CO NEW | 949746101 | 88,176 | $7.4M | 0.03% |
| 192 | TJX COS INC NEW | 872540109 | 49,961 | $7.2M | 0.03% |
| 193 | AMERIPRISE FINL INC | 03076C106 | 14,691 | $7.2M | 0.03% |
| 194 | RAYMOND JAMES FINL INC | 754730109 | 40,095 | $6.9M | 0.03% |
| 195 | TRANE TECHNOLOGIES PLC | TT | 15,916 | $6.7M | 0.03% |
| 196 | WALMART INC | WMT | 64,902 | $6.7M | 0.03% |
| 197 | THERMO FISHER SCIENTIFIC INC | TMO | 13,681 | $6.6M | 0.03% |
| 198 | M & T BK CORP | 55261F104 | 30,525 | $6.0M | 0.03% |
| 199 | ROLLINS INC | ROL | 100,660 | $5.9M | 0.02% |
| 200 | MEDTRONIC PLC | MDT | 61,922 | $5.9M | 0.02% |
| 201 | STAG INDL INC | 85254J102 | 166,199 | $5.9M | 0.02% |
| 202 | WELLTOWER INC | WELL | 32,189 | $5.7M | 0.02% |
| 203 | FIRST CTZNS BANCSHARES INC D | 31946M103 | 3,185 | $5.7M | 0.02% |
| 204 | GOLDMAN SACHS GROUP INC | GSCE | 7,128 | $5.7M | 0.02% |
| 205 | HERSHEY CO | HSY | 29,288 | $5.5M | 0.02% |
| 206 | PARKER-HANNIFIN CORP | PH | 7,172 | $5.4M | 0.02% |
| 207 | NEXTERA ENERGY INC | NEE-PW | 70,506 | $5.3M | 0.02% |
| 208 | CARDINAL HEALTH INC | CAH | 33,769 | $5.3M | 0.02% |
| 209 | F5 INC | FFIV | 16,220 | $5.2M | 0.02% |
| 210 | MCKESSON CORP | MCK | 6,732 | $5.2M | 0.02% |
| 211 | CME GROUP INC | CME | 18,841 | $5.1M | 0.02% |
| 212 | CIENA CORP | CIEN | 31,750 | $4.6M | 0.02% |
| 213 | KROGER CO | KR | 63,932 | $4.3M | 0.02% |
| 214 | WASTE MGMT INC DEL | 94106L109 | 18,777 | $4.1M | 0.02% |
| 215 | GARTNER INC | IT | 14,375 | $3.8M | 0.02% |
| 216 | EXPEDIA GROUP INC | EXPE | 16,799 | $3.6M | 0.02% |
| 217 | HOME DEPOT INC | HD | 6,017 | $2.4M | 0.01% |
| 218 | RANPAK HOLDINGS CORP | PACK | 407,328 | $2.3M | 0.01% |
| 219 | MAPLEBEAR INC | CART | 51,381 | $1.9M | 0.01% |
| 220 | ABBVIE INC | ABBV | 7,928 | $1.8M | 0.01% |
| 221 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 2,350 | $1.2M | 0.00% |
| 222 | BOOKING HOLDINGS INC | BKNG | 210 | $1.1M | 0.00% |
| 223 | DANAHER CORPORATION | 235851102 | 4,953 | $981,982 | 0.00% |
| 224 | INTERNATIONAL BUSINESS MACHS | INTR | 3,320 | $936,771 | 0.00% |
| 225 | APPLOVIN CORP | APP | 1,284 | $922,618 | 0.00% |
| 226 | PLEXUS CORP | PLXS | 5,200 | $752,388 | 0.00% |
| 227 | BOSTON SCIENTIFIC CORP | BSX | 7,592 | $741,207 | 0.00% |
| 228 | MERCADOLIBRE INC | MELI | 313 | $731,462 | 0.00% |
| 229 | ISHARES SILVER TR | SLV | 16,760 | $710,121 | 0.00% |
| 230 | COMERICA INC | 200340107 | 8,560 | $586,531 | 0.00% |
| 231 | EQT CORP | EQT | 10,640 | $579,135 | 0.00% |
| 232 | GE HEALTHCARE TECHNOLOGIES I | GEHC | 4,322 | $324,611 | 0.00% |
| 233 | UNIQURE NV | QURE | 3,828 | $223,440 | 0.00% |
| 234 | ISHARES TR | 464287481 | 1,441 | $205,237 | 0.00% |
| 235 | IONIS PHARMACEUTICALS INC | IONS | 3,093 | $202,344 | 0.00% |