Sutro Biopharma
Ownership
Ownership Structure
Who owns Sutro Biopharma (STRO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 64.9% of the shares are freely tradable; institutional investors hold 86.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Perceptive Advisors LLC | 7.87 | 1,304,846 | +82.4 | 06/30/2026 |
| Bvf Inc | 7.55 | 1,251,788 | +0.0 | 06/30/2026 |
| Affinity Asset Advisors, LLC | 7.07 | 1,172,487 | +9.6 | 06/30/2026 |
| BlackRock Inc | 6.77 | 1,122,655 | +382.5 | 06/30/2026 |
| Samsara BioCapital, LLC | 6.41 | 1,062,872 | +0.0 | 06/30/2026 |
| Kynam Capital Management, LP | 5.26 | 872,558 | +0.0 | 06/30/2026 |
| Orbimed Advisors LLC | 4.49 | 743,944 | -7.1 | 06/30/2026 |
| Balyasny Asset Management LLC | 4.29 | 711,162 | +52.7 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.19 | 694,219 | -3.6 | 06/30/2026 |
| Eventide Asset Management, LLC | 3.53 | 585,262 | -18.2 | 06/30/2026 |
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 |
|---|---|---|---|---|---|
| Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | 12,367 | 112,540 $ | Sep 18, 2026 | direct |
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 |
|---|---|---|---|---|---|---|
| Sep 18, 2026 | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Other | 1,345 | 15.34 | 20,632 |
| Sep 18, 2026 | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Other | 3,750 | 0.00 | – |
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 2, 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.