Institutions / Westfield Capital Management Company, L.P.
Westfield Capital Management Company, L.P.
CIK 1177719 · Institution · as of Mar 31, 2026
Portfolio value
$23.83B
Positions
250
As of
Mar 31, 2026
Portfolio trend
Portfolio value
$23.83B-0.7%Positions
250+3.7%Top holdings
Mar 31, 2026View all 250 →
| Company | Value | % of portfolio |
|---|---|---|
| NVIDIA Corp | $1.10B | 4.6% |
| Ascendis Pharma A/S | $1.10B | 4.6% |
| Comfort Systems USA Inc | $856.24M | 3.6% |
| Apple Inc. | $795.15M | 3.3% |
| FTAI Aviation Ltd | $697.82M | 2.9% |
| Microsoft Corp | $610.60M | 2.6% |
| Alphabet Inc. | $582.81M | 2.4% |
| Howmet Aerospace Inc. | $527.68M | 2.2% |
| Vertiv Holdings Co | $481.54M | 2.0% |
| Amazon.com Inc | $474.78M | 2.0% |
| Axon Enterprise Inc | $451.93M | 1.9% |
| Broadcom Inc. | $382.84M | 1.6% |
| ELI LILLY & Co | $335.33M | 1.4% |
| Tapestry Inc | $310.28M | 1.3% |
| Meta Platforms Inc | $301.41M | 1.3% |
| LPL Financial Holdings Inc. | $265.18M | 1.1% |
| MKS Inc | $240.56M | 1.0% |
| Insmed Inc | $240.12M | 1.0% |
| Vaxcyte, Inc. | $211.88M | 0.9% |
| Rocket Lab CorpRKLB | $203.75M | 0.9% |
| Netflix Inc | $189.41M | 0.8% |
| APi Group Corp | $187.81M | 0.8% |
| Quanta Services Inc | $182.17M | 0.8% |
| GE Vernova Inc. | $173.97M | 0.7% |
| Ares Management Corporation | $171.59M | 0.7% |
Activity
Mar 31, 2026View full history →
InsidersInstitutions
This fund's 13F position changes — what it's buying and selling.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Q1 2026 as of | Trim | Masimo Corporation | $-210.03M | -1.2M -77.58% | 341,229 0.25% of portfolio | high |
| Q1 2026 as of | Add | Insmed Inc | $169.40M | +1.0M +239.51% | 1,468,459 1.01% of portfolio | high |
| Q1 2026 as of | Trim | Bank of America Corp /De | $-134.39M | -2.8M -72.10% | 1,066,885 0.22% of portfolio | high |
| Q1 2026 as of | Exit | Commvault Systems Inc | $-132.52M | -1.1M -100.00% | — | high |
| Q1 2026 as of | Exit | Atlassian Corporation | $-131.69M | -812K -100.00% | — | high |
| Q1 2026 as of | New | Cheniere Energy, Inc. | $130.26M | +459K | 459,044 0.55% of portfolio | high |
| Q1 2026 as of | New | G0260P102 | $129.62M | +3.9M | 3,937,521 0.54% of portfolio | high |
| Q1 2026 as of | Exit | ADMA Biologics Inc | $-127.55M | -7.0M -100.00% | — | high |
| Q1 2026 as of | Trim | Revolution Medicines, Inc. | $-125.30M | -1.3M -45.29% | 1,556,578 0.64% of portfolio | high |
| Q1 2026 as of | Add | FTAI Aviation Ltd | $121.91M | +498K +21.17% | 2,848,227 2.93% of portfolio | high |