BlossomHill Therapeutics, Inc.
Ownership
Ownership Structure
Who owns BlossomHill Therapeutics, Inc. (BLSM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 55.8% of the shares are freely tradable; institutional investors hold 0.0%.
Largest Shareholders
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| JPMorgan Small Cap Growth A | 1.51 | 480,145 | +0.0 | 09/30/2026 |
| Fidelity Select Biotechnology | 1.09 | 347,400 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 0.99 | 316,217 | +471.6 | 09/30/2026 |
| JPMorgan Small Cap Blend A | 0.48 | 153,883 | +0.0 | 09/30/2026 |
| Fidelity Advisor Biotechnology I | 0.42 | 133,400 | +0.0 | 09/30/2026 |
| JPMorgan Small Cap Value I | 0.31 | 97,993 | +0.0 | 09/30/2026 |
| JPMorgan US Small Company L | 0.26 | 84,061 | +0.0 | 09/30/2026 |
| Multi-Manager Small Cap Eq Strat Inst | 0.23 | 73,691 | +0.0 | 09/30/2026 |
| Strategic Advisers Fidelity US TtlStk | 0.19 | 60,021 | +0.0 | 09/30/2026 |
| JPM US Small Cap Growth A dist USD | 0.17 | 52,625 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Gordon Carl L | Director | 2,714,279 | 37,999,906 $ | Aug 10, 2026 | indirect |
| Orbimed Advisors Llc | Director | 2,714,279 | 37,999,906 $ | Aug 10, 2026 | indirect |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 10, 2026 | Gordon Carl L | Director | Buy | 625,000 | 16.00 | 10,000,000 |
| Aug 10, 2026 | Gordon Carl L | Director | Other | 1,049,283 | – | – |
| Aug 10, 2026 | Gordon Carl L | Director | Other | 1,039,996 | – | – |
| Aug 10, 2026 | Orbimed Advisors Llc | Director | Buy | 625,000 | 16.00 | 10,000,000 |
| Aug 10, 2026 | Orbimed Advisors Llc | Director | Other | 1,049,283 | – | – |
| Aug 10, 2026 | Orbimed Advisors Llc | Director | Other | 1,039,996 | – | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 13, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.