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WESTFIELD CAPITAL MANAGEMENT CO LP
Period ended Jun 30, 2026 · Latest filing Aug 12, 2026
These quarterly holdings are delayed and may not include all assets or short positions.
Values are from the reporting date, not current prices or purchase costs.
The same security may appear in multiple rows.
Source: SEC
Reported portfolio value
Quarter-end reported holdings; not current value or investment performance.
View reported values
- Jun 30, 2026: $30,614,527,190
More quarters will appear as history becomes available.
Top holdings
Top 10 at Jun 30, 2026. Matching entries are combined; security classes and options remain separate. Shares exclude principal amounts; option shares reflect the reported underlying amount.
View top holdings values
- NVIDIA CORPORATION · COM · 67066G104 · shares: $1,616,712,338
- ALPHABET INC · CAP STK CL A · 02079K305 · shares: $1,339,806,415
- ASCENDIS PHARMA A/S · ORD SHS · K08588103 · shares: $1,279,793,795
- AXON ENTERPRISE INC · COM · 05464C101 · shares: $836,144,444
- FTAI AVIATION LTD · SHS · G3730V105 · shares: $794,608,199
- APPLE INC · COM · 037833100 · shares: $744,747,287
- COMFORT SYS USA INC · COM · 199908104 · shares: $704,451,409
- BROADCOM INC · COM · 11135F101 · shares: $587,976,343
- MICROSOFT CORP · COM · 594918104 · shares: $527,559,770
- HOWMET AEROSPACE INC · COM · 443201108 · shares: $516,608,027
Reported holdings
278 reported entries| Issuer | Class | CUSIP | Type | Shares / principal | Reported value (USD) |
|---|---|---|---|---|---|
| URANIUM ENERGY CORP | COM | 916896103 | — | 2,800,745 shares | $29,855,942 |
| INNODATA INC | COM NEW | 457642205 | — | 375,091 shares | $28,349,378 |
| SYNAPTICS INC | COM | 87157D109 | — | 226,677 shares | $28,160,084 |
| RYMAN HOSPITALITY PPTYS INC | COM | 78377T107 | — | 218,405 shares | $28,075,963 |
| RIOT PLATFORMS INC | COM | 767292105 | — | 1,013,804 shares | $27,757,954 |
| FASTENAL CO | COM | 311900104 | — | 572,498 shares | $27,497,103 |
| MIAMI INTL HLDGS INC | COM | 59356Q108 | — | 700,741 shares | $26,039,536 |
| TESLA INC | COM | 88160R101 | — | 50,411 shares | $21,202,695 |
| NETFLIX INC. | COM | 64110L106 | — | 290,833 shares | $20,765,475 |
| ALPHABET INC | CAP STK CL C | 02079K107 | — | 57,617 shares | $20,357,815 |
| MUELLER INDS INC | COM | 624756102 | — | 125,791 shares | $15,463,488 |
| BANK OF AMER CORP | COM | 060505104 | — | 240,187 shares | $13,685,855 |
| WILLIAMS COS INC | COM | 969457100 | — | 180,918 shares | $13,449,444 |
| CUMMINS INC | COM | 231021106 | — | 15,389 shares | $10,975,589 |
| COCA COLA CO | COM | 191216100 | — | 133,579 shares | $10,855,965 |
| SUMITOMO MITSUI FIN GRP INC | SPONSORED ADR | 86562M209 | — | 456,612 shares | $10,766,911 |
| CIENA CORP | COM NEW | 171779309 | — | 20,950 shares | $10,277,232 |
| MITSUBISHI UFJ FINANCIAL GRO | SPONSORED ADS | 606822104 | — | 514,757 shares | $10,238,517 |
| WALMART INC | COM | 931142103 | — | 88,491 shares | $10,022,491 |
| JOHNSON & JOHNSON | COM | 478160104 | — | 35,772 shares | $9,085,015 |
| QUANTINUUM INC | CL A COM | 74768A104 | — | 96,396 shares | $7,879,409 |
| TRANE TECHNOLOGIES PLC | SHS | G8994E103 | — | 15,820 shares | $7,770,151 |
| NEXTERA ENERGY INC | COM | 65339F101 | — | 86,920 shares | $7,628,968 |
| TJX COS INC NEW | COM | 872540109 | — | 48,579 shares | $7,359,719 |
| GOLDMAN SACHS GROUP INC | COM | 38141G104 | — | 7,062 shares | $7,142,295 |
| THERMO FISHER SCIENTIFIC INC | COM | 883556102 | — | 14,214 shares | $7,126,331 |
| PARKER-HANNIFIN CORP | COM | 701094104 | — | 7,115 shares | $6,959,324 |
| MERCK & CO INC | COM | 58933Y105 | — | 53,297 shares | $6,848,665 |
| BANCO BILBAO VIZCAYA ARGENTA | SPONSORED ADR | 05946K101 | — | 269,104 shares | $6,743,746 |
| FIRST CTZNS BANCSHARES INC D | CL A | 31946M103 | — | 3,185 shares | $6,627,316 |
| AMGEN INC | COM | 031162100 | — | 17,047 shares | $6,173,060 |
| GE AEROSPACE | COM NEW | 369604301 | — | 15,191 shares | $5,677,332 |
| WILLIAMS SONOMA INC | COM | 969904101 | — | 23,587 shares | $5,498,130 |
| ROLLINS INC | COM | 775711104 | — | 131,503 shares | $5,488,935 |
| MCKESSON CORP | COM | 58155Q103 | — | 6,895 shares | $5,209,862 |
| HEICO CORP NEW | CL A | 422806208 | — | 20,130 shares | $5,191,728 |
| HERSHEY CO | COM | 427866108 | — | 29,173 shares | $5,118,403 |
| VIRTU FINL INC | CL A | 928254101 | — | 85,582 shares | $5,098,120 |
| BUNGE GLOBAL SA | COM SHS | H11356104 | — | 46,759 shares | $4,990,588 |
| EQUINIX INC | COM | 29444U700 | — | 4,772 shares | $4,974,285 |
| SOUTHERN COPPER CORP | COM | 84265V105 | — | 24,268 shares | $4,228,942 |
| WATSCO INC | COM | 942622200 | — | 9,807 shares | $4,086,871 |
| FEDEX CORP | COM | 31428X106 | — | 12,837 shares | $4,019,650 |
| MARVELL TECHNOLOGY INC | COM | 573874104 | — | 13,193 shares | $3,929,988 |
| PFIZER INC | COM | 717081103 | — | 162,023 shares | $3,901,514 |
| DOMINION ENERGY INC | COM | 25746U109 | — | 53,050 shares | $3,622,785 |
| VERISIGN INC | COM | 92343E102 | — | 14,118 shares | $3,551,524 |
| BLOOM ENERGY CORP | COM CL A | 093712107 | — | 10,570 shares | $3,199,539 |
| ANTERO MIDSTREAM CORP | COM | 03676B102 | — | 133,412 shares | $3,035,123 |
| HOME DEPOT INC | COM | 437076102 | — | 6,017 shares | $2,122,076 |
| DANAHER CORP DEL | COM | 235851102 | — | 11,033 shares | $2,101,566 |
| VANGUARD INDEX FDS | GROWTH ETF | 922908736 | — | 23,166 shares | $1,995,521 |
| ABBVIE INC | COM | 00287Y109 | — | 7,854 shares | $1,976,381 |
| WINGSTOP INC | COM | 974155103 | — | 11,260 shares | $1,952,597 |
| RANPAK HOLDINGS CORP | COM CL A | 75321W103 | — | 260,098 shares | $1,901,316 |
| INTUITIVE SURGICAL INC | COM NEW | 46120E602 | — | 4,572 shares | $1,818,193 |
| DEXCOM INC | COM | 252131107 | — | 25,990 shares | $1,750,427 |
| KARMAN HLDGS INC | COMMON STOCK | 485924104 | — | 34,800 shares | $1,737,216 |
| DPC HOLDINGS PLC | ORDINARY SHARES | G2R11M108 | — | 30,000 shares | $1,471,800 |
| BOSTON SCIENTIFIC CORP | COM | 101137107 | — | 34,378 shares | $1,467,253 |
| UNITEDHEALTH GROUP INC | COM | 91324P102 | — | 3,377 shares | $1,403,583 |
| SPDR SERIES TRUST | ST STR SP BIOT | 78464A870 | — | 7,520 shares | $1,190,077 |
| VERTEX PHARMACEUTICALS INC | COM | 92532F100 | — | 2,189 shares | $1,087,342 |
| SPDR SERIES TRUST | ST STR SP REGBNK | 78464A698 | — | 12,330 shares | $922,901 |
| NOVO-NORDISK A S | ADR | 670100205 | — | 15,599 shares | $747,816 |
| WASTE CONNECTIONS INC | COM | 94106B101 | — | 4,466 shares | $744,438 |
| ISHARES TR | RUS MD CP GR ETF | 464287481 | — | 4,949 shares | $724,628 |
| WABTEC | COM | 929740108 | — | 2,490 shares | $671,304 |
| EQT CORP | COM | 26884L109 | — | 10,640 shares | $565,729 |
| ISHARES INC | MSCI AUST ETF | 464286103 | — | 16,850 shares | $474,496 |
| RINGCENTRAL INC | CL A | 76680R206 | — | 10,760 shares | $419,425 |
| ISHARES INC | MSCI BRAZIL ETF | 464286400 | — | 12,090 shares | $417,105 |
| D R HORTON INC | COM | 23331A109 | — | 2,190 shares | $356,707 |
| IONIS PHARMACEUTICALS INC | COM | 462222100 | — | 4,233 shares | $335,635 |
| CAMECO CORP | COM | 13321L108 | — | 3,110 shares | $316,785 |
| STAG INDUSTRIAL INC | COM | 85254J102 | — | 6,467 shares | $246,134 |
| SOPHIA GENETICS SA | ORDINARY SHARES | H82027105 | — | 32,907 shares | $189,873 |
| PULMONX CORP | COM | 745848101 | — | 110,000 shares | $143,000 |