Sutro Biopharma, Inc. has 18 Schedule 13D or 13G filings on record since 2025-07-16. 6 holders' latest filing reports 5% or more of common stock, $0.001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Perceptive Advisors LLC | 7.9% | 1,304,846 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Bvf Partners L P | 7.6% | 1,251,788 | SCHEDULE 13G, 2026-02-18 | 2026-02-10 |
| Affinity Asset Advisors, LLC | 6.5% | 1,069,519 | SCHEDULE 13G/A, 2026-05-14 | 2026-03-31 |
| BlackRock, Inc. | 6.4% | 1,065,366 | SCHEDULE 13G, 2026-07-30 | 2026-06-30 |
| Srinivas Akkaraju | 6.4% | 1,062,872 | SCHEDULE 13G, 2026-05-15 | 2026-02-11 |
| Kynam Capital Management, LP | 5.27% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| The Vanguard Group | 4.87% | 4,115,250 | SCHEDULE 13G/A, 2025-07-29 | 2025-06-30 |
| Point72 Asset Management, L.P. | 1.4% | 237,827 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Millennium Management LLC | 1.3% | 210,378 | SCHEDULE 13G/A, 2026-04-21 | 2026-03-31 |
| Suvretta Capital Management, LLC | 0% | 0 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
| RA Capital Management, L.P. | 0% | 0 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-16 | BlackRock, Inc. | 2.5% | SCHEDULE 13G/A |
| 2025-07-29 | The Vanguard Group | 4.87% | SCHEDULE 13G/A |
| 2025-08-13 | Suvretta Capital Management, LLC | 7.7% | SCHEDULE 13G/A |
| 2025-08-14 | RA Capital Management, L.P. | 0% | SCHEDULE 13G/A |
| 2025-10-23 | Affinity Healthcare Fund, LP | 7.77% | SCHEDULE 13G |
| 2026-01-29 | Affinity Asset Advisors, LLC | 8.8% | SCHEDULE 13G/A |
| 2026-02-13 | Suvretta Capital Management, LLC | 0% | SCHEDULE 13G/A |
| 2026-02-13 | Suvretta Capital Management, LLC | 0% | SCHEDULE 13G/A |
| 2026-02-18 | Bvf Partners L P | 7.6% | SCHEDULE 13G |
| 2026-04-21 | Millennium Management LLC | 1.3% | SCHEDULE 13G/A |
| 2026-04-21 | Perceptive Advisors LLC | 5.4% | SCHEDULE 13G |
| 2026-05-01 | Point72 Asset Management, L.P. | 5.7% | SCHEDULE 13G |
| 2026-05-14 | Affinity Asset Advisors, LLC | 6.5% | SCHEDULE 13G/A |
| 2026-05-15 | Srinivas Akkaraju | 6.4% | SCHEDULE 13G |
| 2026-05-15 | Kynam Capital Management, LP | 5.27% | SCHEDULE 13G/A |
| 2026-07-30 | BlackRock, Inc. | 6.4% | SCHEDULE 13G |
| 2026-08-14 | Point72 Asset Management, L.P. | 1.4% | SCHEDULE 13G/A |
| 2026-08-14 | Perceptive Advisors LLC | 7.9% | SCHEDULE 13G/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.