Sutro Biopharma
STRO · NASDAQ
$11.54+$0.285 (+2.53%)TodayMarket closed ·
Prev close $11.25
Who owns STRO
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 56.7% of STRO’s shares.
- Perceptive Advisors LLC7.9%
- BVF Partners L.P.7.6%
- Affinity Asset Advisors LLC7.1%
- Samsara BioCapital, LLC6.4%
- Next 6 largest institutions27.8%
- All other shareholders43.3%
| Holder | Shares | % of shares |
|---|---|---|
| Perceptive Advisors LLC | 1.30M | 7.87% |
| BVF Partners L.P. | 1.25M | 7.55% |
| Affinity Asset Advisors LLC | 1.17M | 7.08% |
| Samsara BioCapital, LLC | 1.06M | 6.41% |
| BlackRock Institutional Trust Company, N.A. | 994.16K | 6.00% |
| Kynam Capital Management LP | 872.56K | 5.27% |
| OrbiMed Advisors, LLC | 743.94K | 4.49% |
| Balyasny Asset Management LP | 711.16K | 4.29% |
| Vanguard Capital Management, LLC | 694.22K | 4.19% |
| Eventide Asset Management, LLC | 585.26K | 3.53% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Eventide Healthcare & Life Sciences Fund | 715.31K | 4.32% |
| Vanguard Total Stock Market Index Fund | 501.52K | 3.03% |
| iShares Russell 2000 ETF | 405.12K | 2.44% |
| Vanguard Extended Market Index Fund | 177.50K | 1.07% |
| Fidelity Small Cap Index Fund | 172.52K | 1.04% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of STRO in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Gerber Hans-Peter | Option exercise | 3.75K | — |
| Gerber Hans-Peter | Tax withholding | 1.34K | $20.63K |
| Gerber Hans-Peter | Option exercise | 3.75K | — |
| Hunter Heidi | Award | 10.00K | — |
| Dybbs Michael | Award | 10.00K | — |
| Wigginton Jon Marc | Award | 10.00K | — |
| Jagpal Sukhi | Award | 10.00K | — |
| Lobacki Joseph M | Award | 10.00K | — |
| Petree Daniel H | Award | 10.00K | — |
| MATSUI CONNIE | Award | 10.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 1.85M
- Days to cover
- 6.47
- % of shares outstanding
- 11.15%
- Average daily volume
- 285.32K
- Change since last report
- −11.0%
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