Holdings of WESTFIELD CAPITAL MANAGEMENT CO LP
230 declared positions · as of Mar 31, 2026
Original filing · Ten largest lines: 31.9 % of the equity sleeve
Sector breakdown
- Technology 22.8 %
- Industrials 17.5 %
- Financials 7.2 %
- Consumer discretionary 7.0 %
- Communication 5.8 %
- Health care 5.0 %
- Energy 2.2 %
- Materials 1.2 %
- Utilities 0.4 %
- Consumer staples 0.1 %
- Unattributed 30.8 %
Titelia classification, company by company. The unattributed share stays visible.
Currency breakdown
The quoted currency of each line, as declared.
Country breakdown
- US 93.0 %
- DK 5.0 %
- TW 0.8 %
- FR 0.7 %
- KY 0.5 %
- JP 0.0 %
- ES 0.0 %
Shares computed on the equity sleeve.
| Country | Lines | Value | Share |
|---|
| US | 223 | 20.3B $ | 92.98 % |
| DK | 2 | 1.1B $ | 5.04 % |
| TW | 1 | 166.8M $ | 0.76 % |
| FR | 1 | 147.3M $ | 0.67 % |
| KY | 1 | 104.3M $ | 0.48 % |
| JP | 1 | 9M $ | 0.04 % |
| ES | 1 | 5.8M $ | 0.03 % |
Positions
| Company | Shares | Value | Weight |
|---|
| NVIDIA Corp | 6,317,039 | 1.1B $ | |
| Ascendis Pharma A/S | 4,813,440 | 1.1B $ | |
| Comfort Systems USA Inc | 620,915 | 856.2M $ | |
| Apple Inc | 3,133,113 | 795.2M $ | |
| Microsoft Corp | 1,649,513 | 610.6M $ | |
| Alphabet Inc | 2,026,744 | 582.8M $ | |
| Howmet Aerospace Inc | 2,289,697 | 527.7M $ | |
| Vertiv Holdings Co | 1,921,696 | 481.5M $ | |
| Amazon.com Inc | 2,279,654 | 474.8M $ | |
| Axon Enterprise Inc | 1,064,134 | 451.9M $ | |
| Broadcom Inc | 1,236,925 | 382.8M $ | |
| Eli Lilly & Co | 364,579 | 335.3M $ | |
| Tapestry Inc | 2,198,862 | 310.3M $ | |
| Meta Platforms Inc | 526,822 | 301.4M $ | |
| LPL Financial Holdings Inc | 881,506 | 265.2M $ | |
| MKS Inc | 1,046,763 | 240.6M $ | |
| Insmed Inc | 1,468,459 | 240.1M $ | |
| Vaxcyte Inc | 3,646,138 | 211.9M $ | |
| Rocket Lab Corp | 3,172,611 | 203.7M $ | |
| Netflix Inc | 1,969,994 | 189.4M $ | |
| API Group Corp | 4,634,929 | 187.8M $ | |
| Quanta Services Inc | 331,816 | 182.2M $ | |
| GE Vernova Inc | 199,306 | 174M $ | |
| Ares Management Corp | 1,572,787 | 171.6M $ | |
| Rhythm Pharmaceuticals Inc | 1,929,123 | 167.8M $ | |
| Taiwan Semiconductor Manufacturing Co Ltd | 493,504 | 166.8M $ | |
| Marvell Technology Inc | 1,673,381 | 165.7M $ | |
| Bloom Energy Corp | 1,191,572 | 161.4M $ | |
| Samsara Inc | 5,072,821 | 160.8M $ | |
| AMETEK Inc | 745,832 | 159.9M $ | |
| Permian Resources Corp | 7,481,457 | 159.5M $ | |
| Dynatrace Inc | 4,209,594 | 155.7M $ | |
| Revolution Medicines Inc | 1,556,578 | 151.4M $ | |
| Natera Inc | 754,729 | 150.9M $ | |
| Abivax SA | 1,322,938 | 147.3M $ | |
| ServiceNow Inc | 1,394,187 | 145.8M $ | |
| Hilton Worldwide Holdings Inc | 457,425 | 139.1M $ | |
| Visa Inc | 456,548 | 138M $ | |
| Cencora Inc | 436,909 | 137.3M $ | |
| ITT Inc | 703,309 | 134M $ | |
| Celsius Holdings Inc | 3,768,911 | 133.7M $ | |
| Nextpower Inc | 1,107,346 | 133.5M $ | |
| Cheniere Energy Inc | 459,044 | 130.3M $ | |
| Regal Rexnord Corp | 681,717 | 127.7M $ | |
| MSCI Inc | 233,764 | 126M $ | |
| Guardant Health Inc | 1,362,539 | 125.9M $ | |
| Live Nation Entertainment Inc | 810,710 | 123.6M $ | |
| Tesla Inc | 316,102 | 117.5M $ | |
| Globe Life Inc | 842,423 | 117.2M $ | |
| Dutch Bros Inc | 2,313,357 | 117.2M $ | |
| Cloudflare Inc | 541,566 | 111.7M $ | |
| Roku Inc | 1,178,219 | 111.5M $ | |
| XPO Inc | 571,992 | 111.3M $ | |
| Fifth Third Bancorp | 2,385,422 | 110.8M $ | |
| Everpure Inc | 1,874,763 | 110.7M $ | |
| Kratos Defense & Security Solutions, Inc. | 1,563,146 | 110.2M $ | |
| American International Group Inc | 1,458,711 | 109.8M $ | |
| Snowflake Inc | 718,810 | 108.4M $ | |
| Primoris Services Corp | 743,269 | 106.3M $ | |
| Jones Lang LaSalle Inc | 347,779 | 105.8M $ | |
| Legence Corp | 1,861,653 | 105.1M $ | |
| LEGEND BIOTECH CORP | 5,763,475 | 104.3M $ | |
| KeyCorp | 5,193,334 | 104.1M $ | |
| Ross Stores Inc | 471,916 | 102.2M $ | |
| Palomar Holdings Inc | 854,116 | 102.1M $ | |
| Palo Alto Networks Inc | 636,483 | 102M $ | |
| Diamondback Energy Inc | 503,474 | 99.6M $ | |
| Palantir Technologies Inc | 674,557 | 98.7M $ | |
| Semtech Corp | 1,280,594 | 98.5M $ | |
| Woodward Inc | 272,185 | 97.4M $ | |
| Arista Networks Inc | 780,402 | 95.8M $ | |
| AutoZone Inc | 28,363 | 95.8M $ | |
| Coherent Corp | 396,644 | 94.5M $ | |
| Astera Labs Inc | 860,113 | 94.3M $ | |
| Braze Inc | 3,973,906 | 93.8M $ | |
| Jabil Inc | 349,209 | 92.8M $ | |
| Lincoln Electric Holdings Inc | 358,165 | 89.2M $ | |
| GeneDx Holdings Corp | 1,369,108 | 87.9M $ | |
| F5 Inc | 298,542 | 86.4M $ | |
| East West Bancorp Inc | 805,956 | 86M $ | |
| Life Time Group Holdings Inc | 3,185,515 | 85.8M $ | |
| O'Reilly Automotive Inc | 887,999 | 82M $ | |
| Morgan Stanley | 496,558 | 81.7M $ | |
| Alnylam Pharmaceuticals Inc | 245,539 | 81.2M $ | |
| FirstCash Holdings Inc | 431,993 | 81.2M $ | |
| IDEX Corp | 426,019 | 80.8M $ | |
| MasTec Inc | 249,980 | 80.4M $ | |
| Houlihan Lokey Inc | 543,611 | 78.1M $ | |
| Plexus Corp | 384,493 | 77.9M $ | |
| Karman Holdings Inc | 964,305 | 77.2M $ | |
| Applied Industrial Technologies Inc | 289,201 | 76.7M $ | |
| Targa Resources Corp | 304,997 | 76.5M $ | |
| Calix Inc | 1,546,101 | 75.7M $ | |
| Adaptive Biotechnologies Corp | 5,436,718 | 75.5M $ | |
| Wynn Resorts Ltd | 740,013 | 75.1M $ | |
| Clean Harbors Inc | 261,092 | 74.9M $ | |
| IDEXX Laboratories Inc | 132,860 | 74.7M $ | |
| Vistra Corp | 494,875 | 74.4M $ | |
| Rockwell Automation Inc | 206,277 | 74M $ | |
| Guidewire Software Inc | 486,581 | 72.8M $ | |