SAB Biotherapeutics, Inc. has 22 Schedule 13D or 13G filings on record since 2025-10-03. 10 holders' latest filing reports 5% or more of common stock, $0.0001 par value per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Vivo Opportunity Fund Holdings, L.P. | 9.99% | 22,637,108 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| RA Capital Management, L.P. | 9.9% | 9,609,852 | SCHEDULE 13D/A, 2026-08-10 | 2026-08-06 |
| Commodore Capital LP | 9.9% | 8,948,170 | SCHEDULE 13G/A, 2026-08-14 | |
| Balyasny Asset Management L.P. | 9.45% | 7,225,439 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Bvf Partners L P | 9.1% | 4,761,906 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| Caligan Partners LP | 8.8% | 7,967,207 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Adage Capital Management, L.P. | 8.38% | 6,405,553 | SCHEDULE 13G, 2026-08-12 | 2026-06-30 |
| Perceptive Advisors LLC | 7.3% | 6,627,501 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Woodline Partners LP | 6.8% | 5,455,355 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Millennium Management LLC | 5.1% | 3,432,153 | SCHEDULE 13G, 2026-05-01 | 2026-04-24 |
| RTW Investments, LP | 3.2% | 1,587,302 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-10-03 | Vivo Opportunity Fund Holdings, L.P. | 9.99% | SCHEDULE 13G |
| 2025-10-03 | RA Capital Management, L.P. | 9.9% | SCHEDULE 13D |
| 2025-10-03 | Commodore Capital LP | 9.9% | SCHEDULE 13G |
| 2025-11-14 | Woodline Partners LP | 9.9% | SCHEDULE 13G |
| 2025-11-14 | Bvf Partners L P | 9.99% | SCHEDULE 13G/A |
| 2026-01-22 | Perceptive Advisors LLC | 7.3% | SCHEDULE 13G |
| 2026-02-17 | Bvf Partners L P | 9.1% | SCHEDULE 13G/A |
| 2026-02-17 | RTW Investments, LP | 3.2% | SCHEDULE 13G/A |
| 2026-03-11 | RA Capital Management, L.P. | 9.9% | SCHEDULE 13D/A |
| 2026-03-23 | RA Capital Management, L.P. | 9.9% | SCHEDULE 13D/A |
| 2026-05-01 | Millennium Management LLC | 5.1% | SCHEDULE 13G |
| 2026-05-15 | Balyasny Asset Management L.P. | 9.99% | SCHEDULE 13G |
| 2026-05-15 | Perceptive Advisors LLC | 8.4% | SCHEDULE 13G/A |
| 2026-05-15 | Caligan Partners LP | 10.4% | SCHEDULE 13G |
| 2026-08-10 | RA Capital Management, L.P. | 9.9% | SCHEDULE 13D/A |
| 2026-08-12 | Adage Capital Management, L.P. | 8.38% | SCHEDULE 13G |
| 2026-08-14 | Woodline Partners LP | 6.8% | SCHEDULE 13G/A |
| 2026-08-14 | Balyasny Asset Management L.P. | 9.45% | SCHEDULE 13G/A |
| 2026-08-14 | Perceptive Advisors LLC | 7.3% | SCHEDULE 13G/A |
| 2026-08-14 | Vivo Opportunity Fund Holdings, L.P. | 9.99% | SCHEDULE 13G/A |
| 2026-08-14 | Caligan Partners LP | 8.8% | SCHEDULE 13G/A |
| 2026-08-14 | Commodore Capital LP | 9.9% | 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.