WESTFIELD CAPITAL MANAGEMENT CO LP - Stock Holdings in 13F Filings (SEC)
Updated on March 15, 2026.
Based on 13F Filings filed with the SEC on February 11, 2026, for the 2025 Q4 period, WESTFIELD CAPITAL MANAGEMENT CO LP held in its portfolio 241 assets valued at $24,005,011,742 (i.e. $24.01B).
The most valuable assets in the portfolio included: NVIDIA CORPORATION ($1.11B), ASCENDIS PHARMA A/S ($1.11B), and APPLE INC ($890.16M).
The chart below shows the top 10 valuable assets, and the table below shows the top 241 valuable assets.
You can see similar for other investment managers.
Related Topics: SEC Topic List.
Data Source: SEC.
WESTFIELD CAPITAL MANAGEMENT CO LP - Stock Holdings in 13F Filings (SEC)
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| Name of Issuer | No. of Shares | Value ($) | Class |
|---|---|---|---|
| NVIDIA CORPORATION | 5951049 | 1109870719 | COM |
| ASCENDIS PHARMA A/S | 5185696 | 1105797733 | SPONSORED ADR |
| APPLE INC | 3274318 | 890156149 | COM |
| MICROSOFT CORP | 1621219 | 784054129 | COM |
| ALPHABET INC | 2178478 | 681863695 | CAP STK CL A |
| COMFORT SYS USA INC | 668835 | 624217111 | COM |
| AMAZON COM INC | 2330770 | 537988375 | COM |
| AXON ENTERPRISE INC | 831177 | 472050610 | COM |
| FTAI AVIATION LTD | 2350625 | 462720531 | SHS |
| HOWMET AEROSPACE INC | 2219125 | 454964962 | COM |
| META PLATFORMS INC | 655283 | 432545694 | CL A |
| BROADCOM INC | 1112318 | 384973115 | COM |
| VERTIV HOLDINGS CO | 2277716 | 369012808 | COM CL A |
| ELI LILLY & CO | 277549 | 298276527 | COM |
| TAPESTRY INC | 2098104 | 268074735 | COM |
| REVOLUTION MEDICINES INC | 2845013 | 226605319 | COM |
| SERVICENOW INC | 1476803 | 226231524 | COM |
| LPL FINL HLDGS INC | 625562 | 223431883 | COM |
| VISA INC | 603926 | 211802953 | COM CL A |
| BANK AMERICA CORP | 3823609 | 210298513 | COM |
| TESLA INC | 461675 | 207624330 | COM |
| MASIMO CORP | 1522049 | 197957646 | COM |
| ARES MANAGEMENT CORPORATION | 1151200 | 186068483 | CL A COM STK |
| AMETEK INC | 900216 | 184823313 | COM |
| ROCKET LAB CORP | 2592443 | 180848824 | COM |
| SEMTECH CORP | 2448612 | 180438198 | COM |
| HEALTHEQUITY INC | 1952452 | 178864128 | COM |
| FIFTH THIRD BANCORP | 3746926 | 175393613 | COM |
| AUTOZONE INC | 51122 | 173379435 | COM |
| MARVELL TECHNOLOGY INC | 1947807 | 165524653 | COM |
| NATERA INC | 714692 | 163728859 | COM |
| VAXCYTE INC | 3539717 | 163322542 | COM |
| CASELLA WASTE SYS INC | 1665226 | 163092234 | CL A |
| NETFLIX INC | 1597547 | 149786032 | COM |
| DYNATRACE INC | 3356708 | 145479725 | COM NEW |
| SNOWFLAKE INC | 649105 | 142387741 | COM SHS |
| HUBSPOT INC | 352154 | 141319255 | COM |
| SAMSARA INC | 3953970 | 140168243 | COM CL A |
| ABIVAX SA | 1009966 | 136198965 | SPONSORED ADS |
| RHYTHM PHARMACEUTICALS INC | 1267158 | 135636592 | COM |
| TAIWAN SEMICONDUCTOR MFG LTD | 446195 | 135594105 | SPONSORED ADS |
| MKS INC. | 839773 | 134195725 | COM |
| LEGEND BIOTECH CORP | 6164677 | 134020083 | SPONSORED ADS |
| COMMVAULT SYS INC | 1057077 | 132515173 | COM |
| GENEDX HOLDINGS CORP | 1018261 | 132435026 | COM CL A |
| API GROUP CORP | 3453355 | 132125362 | COM STK |
| ATLASSIAN CORPORATION | 812215 | 131692460 | CL A |
| ADMA BIOLOGICS INC | 6992907 | 127550624 | COM |
| REGAL REXNORD CORPORATION | 893100 | 125319792 | COM |
| ROYAL CARIBBEAN GROUP | 448653 | 125138375 | COM |
| COHERENT CORP | 665123 | 122761747 | COM |
| ROKU INC | 1112478 | 120692738 | COM CL A |
| MSCI INC | 207792 | 119216459 | COM |
| PRIMORIS SVCS CORP | 952196 | 118205611 | COM |
| GE VERNOVA INC | 177934 | 116292243 | COM |
| QUANTA SVCS INC | 273528 | 115445198 | COM |
| PALOMAR HLDGS INC | 840226 | 113228856 | COM |
| LIVE NATION ENTERTAINMENT IN | 775234 | 110470889 | COM |
| INSULET CORP | 386468 | 109849805 | COM |
| DUTCH BROS INC | 1779616 | 108948092 | CL A |
| CENCORA INC | 319215 | 107814916 | COM |
| TOPBUILD CORP | 255451 | 106571603 | COM |
| DESCARTES SYS GROUP INC | 1193869 | 104654557 | COM |
| HEICO CORP NEW | 412041 | 104011510 | CL A |
| HILTON WORLDWIDE HLDGS INC | 357721 | 102755321 | COM |
| CLOUDFLARE INC | 519475 | 102414407 | CL A COM |
| ITT INC | 587446 | 101927755 | COM |
| PURE STORAGE INC | 1520219 | 101869854 | CL A |
| IDEXX LABS INC | 147447 | 99752238 | COM |
| BLOOM ENERGY CORP | 1145296 | 99514769 | COM CL A |
| XPO INC | 724214 | 98427925 | COM |
| EAST WEST BANCORP INC | 874152 | 98245943 | COM |
| DOORDASH INC | 425080 | 96272126 | CL A |
| ABBVIE INC | 419784 | 95916495 | COM |
| DEXCOM INC | 1439689 | 95552169 | COM |
| ALKAMI TECHNOLOGY INC | 4118355 | 95010450 | COM |
| NEXTPOWER INC | 1090300 | 94976033 | CLASS A COM |
| KRATOS DEFENSE & SEC SOLUTIO | 1245587 | 94552509 | COM NEW |
| SHARKNINJA INC | 840060 | 94002724 | COM SHS |
| ORACLE CORP | 474397 | 92464723 | COM |
| ROCKWELL AUTOMATION INC | 233795 | 90962620 | COM |
| HOULIHAN LOKEY INC | 520002 | 90579148 | CL A |
| C H ROBINSON WORLDWIDE INC | 556472 | 89458439 | COM NEW |
| OPTION CARE HEALTH INC | 2765305 | 88102617 | COM NEW |
| BURLINGTON STORES INC | 302307 | 87321512 | COM |
| TECHNIPFMC PLC | 1952427 | 87000147 | COM |
| OREILLY AUTOMOTIVE INC | 952702 | 86895993 | COM |
| IMAX CORP | 2346486 | 86726123 | COM |
| FABRINET | 190170 | 86580676 | SHS |
| VISTRA CORP | 533945 | 86141415 | COM |
| FIRSTCASH HOLDINGS INC | 537734 | 85704045 | COM |
| GLOBE LIFE INC | 608813 | 85148586 | COM |
| PERMIAN RESOURCES CORP | 5951186 | 83495140 | CLASS A COM |
| KEYCORP | 4040297 | 83391730 | COM |
| PALO ALTO NETWORKS INC | 448460 | 82606353 | COM |
| DRAFTKINGS INC NEW | 2383054 | 82120057 | COM CL A |
| LINCOLN ELEC HLDGS INC | 337725 | 80932419 | COM |
| PROCORE TECHNOLOGIES INC | 1105325 | 80401341 | COM |
| TRANSUNION | 933553 | 80052170 | COM |
| BIRKENSTOCK HOLDING PLC | 1954801 | 79951361 | COM SHS |
| WINTRUST FINL CORP | 559762 | 78265923 | COM |
| ONTO INNOVATION INC | 483082 | 76259325 | COM |
| UNITEDHEALTH GROUP INC | 230278 | 76017145 | COM |
| FAIR ISAAC CORP | 44593 | 75389529 | COM |
| INSMED INC | 432521 | 75275955 | COM PAR $.01 |
| BRAZE INC | 2187275 | 75001660 | COM CL A |
| JABIL INC | 328412 | 74884504 | COM |
| SAIA INC | 228751 | 74691777 | COM |
| DANAHER CORPORATION | 321487 | 73594775 | COM |
| APPLIED INDL TECHNOLOGIES IN | 285290 | 73253913 | COM |
| VULCAN MATLS CO | 254044 | 72458530 | COM |
| F5 INC | 281299 | 71804383 | COM |
| RED ROCK RESORTS INC | 1157653 | 71716603 | CL A |
| SILICON LABORATORIES INC | 547403 | 71545572 | COM |
| IDEX CORP | 401998 | 71531524 | COM |
| CELSIUS HLDGS INC | 1544215 | 70632394 | COM NEW |
| WYNN RESORTS LTD | 581717 | 69998007 | COM |
| KKR & CO INC | 546499 | 69667650 | COM |
| LEGENCE CORP | 1613326 | 69437551 | CL A |
| GARMIN LTD | 335744 | 68105623 | SHS |
| CREDO TECHNOLOGY GROUP HOLDI | 470687 | 67727152 | ORDINARY SHARES |
| GALLAGHER ARTHUR J & CO | 259491 | 67153723 | COM |
| MONGODB INC | 159529 | 66952601 | CL A |
| BLUE OWL CAPITAL INC | 4423608 | 66088704 | COM CL A |
| ADAPTIVE BIOTECHNOLOGIES COR | 4060481 | 65942211 | COM |
| GENIUS SPORTS LIMITED | 5951203 | 65582257 | SHARES CL A |
| AFFIRM HLDGS INC | 851834 | 63402005 | COM CL A |
| ZSCALER INC | 280807 | 63159107 | COM |
| HUNT J B TRANS SVCS INC | 318165 | 61832227 | COM |
| CSX CORP | 1705507 | 61824637 | COM |
| KARMAN HLDGS INC | 836981 | 61241900 | COMMON STOCK |
| CALIX INC | 1145292 | 60620306 | COM |
| PRIMERICA INC | 234597 | 60610481 | COM |
| MOODYS CORP | 118321 | 60444231 | COM |
| PACKAGING CORP AMER | 284914 | 58757814 | COM |
| BIO-TECHNE CORP | 994330 | 58476547 | COM |
| IRHYTHM TECHNOLOGIES INC | 325063 | 57679179 | COM |
| CLEAN HARBORS INC | 245594 | 57586881 | COM |
| SYNOPSYS INC | 121649 | 57140964 | COM |
| DORMAN PRODS INC | 462212 | 56939896 | COM |
| VITA COCO CO INC | 1073610 | 56912066 | COM |
| GUARDANT HEALTH INC | 539190 | 55072867 | COM |
| XENON PHARMACEUTICALS INC | 1226771 | 54983876 | COM |
| WASTE CONNECTIONS INC | 313276 | 54936113 | COM |
| ADVANCED MICRO DEVICES INC | 250455 | 53637377 | COM |
| DIAMONDBACK ENERGY INC | 354655 | 53315341 | COM |
| PARKER-HANNIFIN CORP | 57873 | 50868052 | COM |
| STEPSTONE GROUP INC | 786501 | 50469769 | COM CL A |
| BIO RAD LABS INC | 165107 | 50025770 | CL A |
| IONQ INC | 1114665 | 50015019 | COM |
| LATTICE SEMICONDUCTOR CORP | 678146 | 49897983 | COM |
| F N B CORP | 2903113 | 49643232 | COM |
| AVIENT CORPORATION | 1574530 | 49188317 | COM |
| BUILDERS FIRSTSOURCE INC | 475697 | 48944464 | COM |
| HAMILTON LANE INC | 363487 | 48819939 | CL A |
| SALESFORCE INC | 178508 | 47288601 | COM |
| TALEN ENERGY CORP | 124227 | 46565249 | COM |
| TRANE TECHNOLOGIES PLC | 118163 | 45989190 | SHS |
| TOAST INC | 1268337 | 45038647 | CL A |
| RYAN SPECIALTY HOLDINGS INC | 814334 | 42044064 | CL A |
| MACOM TECH SOLUTIONS HLDGS I | 231093 | 39581684 | COM |
| NIQ GLOBAL INTELLIGENCE PLC | 2388660 | 39389003 | ORDINARY SHARES |
| RADNET INC | 531761 | 37941147 | COM |
| ROBLOX CORP | 461670 | 37409108 | CL A |
| ALNYLAM PHARMACEUTICALS INC | 93444 | 37158099 | COM |
| TARGA RES CORP | 198542 | 36631076 | COM |
| ROBINHOOD MKTS INC | 312554 | 35349810 | COM CL A |
| AVIDITY BIOSCIENCES INC | 471127 | 33982391 | COM |
| RAMBUS INC DEL | 362092 | 33272634 | COM |
| ASTERA LABS INC | 195294 | 32489110 | COM |
| SPX TECHNOLOGIES INC | 141462 | 28300888 | COM |
| PALANTIR TECHNOLOGIES INC | 154585 | 27477516 | CL A |
| APPLIED DIGITAL CORP | 1034397 | 25363414 | COM NEW |
| FORMFACTOR INC | 449604 | 25078911 | COM |
| TRANSDIGM GROUP INC | 16193 | 21533597 | COM |
| BICYCLE THERAPEUTICS PLC | 3016026 | 21353464 | SPONSORED ADS |
| RIGETTI COMPUTING INC | 935778 | 20727483 | COMMON STOCK |
| CORE SCIENTIFIC INC NEW | 1392132 | 20269442 | COM |
| ALPHABET INC | 45820 | 14378316 | CAP STK CL C |
| MUELLER INDS INC | 124927 | 14341620 | COM |
| WILLIAMS COS INC | 231177 | 13896049 | COM |
| PATTERN GROUP INC | 1184716 | 13671623 | COM SER A |
| ISHARES TR | 66532 | 11173384 | CORE S&P US GWT |
| COCA COLA CO | 132670 | 9274960 | COM |
| SUMITOMO MITSUI FINL GROUP I | 453681 | 8769654 | SPONSORED ADR |
| WELLS FARGO CO NEW | 86942 | 8102994 | COM |
| MITSUBISHI UFJ FINL GROUP IN | 510711 | 8099876 | SPONSORED ADS |
| CINTAS CORP | 42271 | 7949907 | COM |
| THERMO FISHER SCIENTIFIC INC | 13681 | 7927455 | COM |
| WALMART INC | 70910 | 7900083 | COM |
| CUMMINS INC | 15274 | 7796613 | COM |
| TJX COS INC NEW | 48343 | 7425968 | COM |
| CIENA CORP | 31750 | 7425373 | COM NEW |
| HOME DEPOT INC | 20347 | 7001403 | COM |
| JOHNSON & JOHNSON | 33288 | 6888952 | COM |
| FIRST CTZNS BANCSHARES INC D | 3185 | 6835583 | CL A |
| NEXTERA ENERGY INC | 83926 | 6737579 | COM |
| RAYMOND JAMES FINL INC | 40095 | 6438856 | COM |
| BANCO BILBAO VIZCAYA ARGENTA | 266816 | 6219481 | SPONSORED ADR |
| ISHARES TR | 13058 | 6180501 | RUS 1000 GRW ETF |
| GOLDMAN SACHS GROUP INC | 7029 | 6178491 | COM |
| M & T BK CORP | 29712 | 5986374 | COM |
| ROLLINS INC | 99399 | 5965928 | COM |
| CME GROUP INC | 21785 | 5949048 | COM |
| MEDTRONIC PLC | 59970 | 5760718 | SHS |
| MERCK & CO INC | 53552 | 5636884 | COM |
| MCKESSON CORP | 6840 | 5610784 | COM |
| MCDONALDS CORP | 17757 | 5427072 | COM |
| HERSHEY CO | 29000 | 5277420 | COM |
| CITIGROUP INC | 43744 | 5104487 | COM NEW |
| GILEAD SCIENCES INC | 41515 | 5095551 | COM |
| EXPEDIA GROUP INC | 16577 | 4696430 | COM NEW |
| SOUTHERN COPPER CORP | 32634 | 4682000 | COM |
| SLB LIMITED | 120910 | 4640526 | COM STK |
| HALLIBURTON CO | 136881 | 3868257 | COM |
| CARDINAL HEALTH INC | 17831 | 3664271 | COM |
| GARTNER INC | 14370 | 3625264 | COM |
| PFIZER INC | 137936 | 3434606 | COM |
| DOMINION ENERGY INC | 45694 | 2677211 | COM |
| ISHARES TR | 18280 | 2503286 | RUS MD CP GR ETF |
| RANPAK HOLDINGS CORP | 407328 | 2203644 | COM CL A |
| MONDAY COM LTD | 13955 | 2059212 | SHS |
| BERKSHIRE HATHAWAY INC DEL | 2350 | 1181228 | CL B NEW |
| BOOKING HOLDINGS INC | 210 | 1124619 | COM |
| ISHARES SILVER TR | 16760 | 1079679 | ISHARES |
| INTERNATIONAL BUSINESS MACHS | 3320 | 983417 | COM |
| APPLOVIN CORP | 1284 | 865196 | COM CL A |
| BOSTON SCIENTIFIC CORP | 8672 | 826875 | COM |
| PLEXUS CORP | 5200 | 764400 | COM |
| COMERICA INC | 8560 | 744121 | COM |
| MERCADOLIBRE INC | 313 | 630463 | COM |
| EQT CORP | 10640 | 570304 | COM |
| VERTEX PHARMACEUTICALS INC | 1132 | 513204 | COM |
| CHURCHILL DOWNS INC | 4330 | 492667 | COM |
| ICON PLC | 2534 | 461702 | SHS |
| PULMONX CORP | 184903 | 408636 | COM |
| CIDARA THERAPEUTICS INC | 1411 | 311676 | COM NEW |
| IONIS PHARMACEUTICALS INC | 3157 | 249750 | COM |
| APPLIED MATLS INC | 936 | 240543 | COM |
| STAG INDL INC | 6467 | 237727 | COM |
| BEAM THERAPEUTICS INC | 8073 | 223784 | COM |
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