Westfield Capital Management Co
Westfield Capital Management Co reported 278 stocks worth $30.6B in its 13F filing for Q2 2026, filed Aug 12, 2026. Its largest holdings are NVDA (5.3%), GOOGL (4.4%) and ASND (4.2%). Compared with Q1 2026, the fund opened new positions in ASND, CRS and PTCT, added to NVDA, GOOGL and AXON, trimmed AAPL, FIX and MSFT and sold out of ASND, KTOS and AIG.
Holdings
| # | Stock | Value | Weight | Shares | Change | Shares, 8 qtrs | Held |
|---|---|---|---|---|---|---|---|
| 1 |  NVDA Nvidia Corporation | $1.6B | 5.3% | 8.1M | +1.8M (+28%) | 8 of 8 | |
| 2 |  GOOGL Alphabet Inc | $1.3B | 4.4% | 3.7M | +1.7M (+85%) | 8 of 8 | |
| 3 |  ASND Ascendis Pharma A/s | $1.3B | 4.2% | 4.8M | New position | 1 of 8 | |
| 4 |  AXON Axon Enterprise Inc | $836M | 2.7% | 1.5M | +427K (+40%) | 8 of 8 | |
| 5 |  FTAI Ftai Aviation Ltd | $795M | 2.6% | 2.9M | +89K (+3%) | 8 of 8 | |
| 6 |  AAPL Apple Inc | $745M | 2.4% | 2.6M | −559K (−18%) | 8 of 8 | |
| 7 |  FIX Comfort Sys USA Inc | $704M | 2.3% | 355K | −265K (−43%) | 8 of 8 | |
| 8 |  AVGO Broadcom Inc | $588M | 1.9% | 1.6M | +320K (+26%) | 8 of 8 | |
| 9 |  MSFT Microsoft Corp | $528M | 1.7% | 1.4M | −235K (−14%) | 8 of 8 | |
| 10 |  HWM Howmet Aerospace Inc | $517M | 1.7% | 1.9M | −368K (−16%) | 6 of 8 |
Positions at Jun 30, 2026, as reported. Change is against the fund's Q1 2026 filing; weight is the share of the fund's reported stocks.
Sold out
held in Q1 2026, gone in Q2 2026| Stock | Value last quarter | Shares sold |
|---|---|---|
ASND Ascendis Pharma A/s | $1.1B | 4.8M |
 KTOS KRATOS DEFENSE & SEC SOLUTIO | $110M | 1.6M |
 AIG American Intl Group Inc | $110M | 1.5M |
 PLTR Palantir Technologies Inc | $98.7M | 675K |
 WGS Genedx Holdings Corp | $87.9M | 1.4M |
🔒 Free account: see all 30.
Reported value
last 8 quartersThe value of the US stocks the fund reported, at quarter end prices. It moves with the market as well as with buying and selling.
Filings for Q2 2026
straight from the SEC| Filed | Form | Quarter | |
|---|---|---|---|
| Aug 12, 2026 | 13F-HR | Q2 2026 | SEC filing ↗ |
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All hedge fund holdings →Westfield Capital Management Co 13F FAQ
What does Westfield Capital Management Co own?
Westfield Capital Management Co reported 278 stocks worth $30.6B in its 13F filing for Q2 2026, filed Aug 12, 2026. Its largest holdings are NVDA (5.3%), GOOGL (4.4%) and ASND (4.2%). The table above lists every position in the filing (the top 10 without an account).
What did Westfield Capital Management Co buy and sell in Q2 2026?
Compared with Q1 2026: 69 new positions, 97 added to, 99 trimmed and 41 sold out. New positions include ASND, CRS and PTCT. It sold all of ASND, KTOS and AIG.
When will Westfield Capital Management Co file its next 13F?
Holdings as of Sep 30, 2026 are due by Nov 16, 2026. The filing appears on this page within minutes of reaching the SEC.
How much is Westfield Capital Management Co's portfolio worth?
The Q2 2026 filing reports $30.6B in US stocks. That leaves out cash, bonds, short positions and most foreign holdings, so the fund's total assets are usually larger.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Holdings come from the fund's SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. The fund may have changed its positions since. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.