iBio, Inc. has 29 Schedule 13D or 13G filings on record since 2025-07-30. 9 holders' latest filing reports 5% or more of common stock, $0.001 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 |
|---|---|---|---|---|
| Affinity Asset Advisors, LLC | 9.99% | 5,068,882 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 |
| Adage Capital Management, L.P. | 9.99% | 2,181,422 | SCHEDULE 13G, 2025-11-13 | 2025-09-30 |
| SilverArc Capital Management, LLC | 9.99% | 2,181,422 | SCHEDULE 13G, 2025-11-14 | 2025-09-30 |
| Cormorant Asset Management, LP | 9.99% | 5,117,481 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Sirenia Capital Management LP | 9.9% | 11,586,340 | SCHEDULE 13G, 2026-05-15 | 2026-03-31 |
| Vestal Point Capital, LP | 7.9% | 4,025,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Frazier Life Sciences Public Fund, L.P. | 5.7% | 1,953,467 | SCHEDULE 13G/A, 2026-05-12 | 2026-03-31 |
| Lynx1 Capital Management LP | 5.4% | 2,807,016 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| Integrated Core Strategies (US) LLC | 5.2% | 1,234,295 | SCHEDULE 13G, 2026-01-22 | 2026-01-15 |
| Ikarian Capital, LLC | 4.99% | 1,151,051 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| EcoR1 Capital, LLC | 4.6% | 1,583,000 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| ADAR1 Capital Management, LLC | 4.4% | 1,351,671 | SCHEDULE 13G/A, 2026-02-17 | 2025-12-31 |
| Patrick J. Crutcher | 3.1% | 847,044 | SCHEDULE 13G/A, 2025-07-30 | 2025-06-30 |
| Point72 Asset Management, L.P. | 0% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Logos Global Management LP | 0% | 0 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-30 | Patrick J. Crutcher | 3.1% | SCHEDULE 13G/A |
| 2025-08-14 | ADAR1 Capital Management, LLC | 9.9% | SCHEDULE 13G/A |
| 2025-08-25 | Point72 Asset Management, L.P. | 9.9% | SCHEDULE 13G |
| 2025-08-26 | Affinity Healthcare Fund, LP | 9.99% | SCHEDULE 13G |
| 2025-11-13 | Adage Capital Management, L.P. | 9.99% | SCHEDULE 13G |
| 2025-11-14 | Vestal Point Capital, LP | 9.9% | SCHEDULE 13G |
| 2025-11-14 | SilverArc Capital Management, LLC | 9.99% | SCHEDULE 13G |
| 2025-11-14 | Cormorant Asset Management, LP | 9.99% | SCHEDULE 13G |
| 2025-11-14 | Ikarian Capital, LLC | 4.99% | SCHEDULE 13G/A |
| 2025-12-03 | Affinity Asset Advisors, LLC | 9.99% | SCHEDULE 13G/A |
| 2025-12-16 | Frazier Life Sciences Public Fund, L.P. | 8.7% | SCHEDULE 13G |
| 2025-12-17 | EcoR1 Capital, LLC | 9.9% | SCHEDULE 13G |
| 2025-12-19 | Logos Global Management LP | 8.9% | SCHEDULE 13G |
| 2026-01-22 | Integrated Core Strategies (US) LLC | 5.2% | SCHEDULE 13G |
| 2026-01-29 | Affinity Asset Advisors, LLC | 9.99% | SCHEDULE 13G/A |
| 2026-02-17 | Lynx1 Capital Management LP | 0% | SCHEDULE 13G/A |
| 2026-02-17 | Logos Global Management LP | 4.6% | SCHEDULE 13G/A |
| 2026-02-17 | ADAR1 Capital Management, LLC | 4.4% | SCHEDULE 13G/A |
| 2026-05-12 | Frazier Life Sciences Public Fund, L.P. | 5.7% | SCHEDULE 13G/A |
| 2026-05-14 | Affinity Asset Advisors, LLC | 9.99% | SCHEDULE 13G/A |
| 2026-05-15 | Sirenia Capital Management LP | 9.9% | SCHEDULE 13G |
| 2026-05-15 | Point72 Asset Management, L.P. | 0% | SCHEDULE 13G/A |
| 2026-05-15 | EcoR1 Capital, LLC | 4.6% | SCHEDULE 13G/A |
| 2026-05-15 | Logos Global Management LP | 0% | SCHEDULE 13G/A |
| 2026-05-15 | Cormorant Asset Management, LP | 9.99% | SCHEDULE 13G/A |
| 2026-08-13 | Affinity Asset Advisors, LLC | 9.99% | SCHEDULE 13G/A |
| 2026-08-14 | Vestal Point Capital, LP | 7.9% | SCHEDULE 13G/A |
| 2026-08-14 | Lynx1 Capital Management LP | 5.4% | SCHEDULE 13G |
| 2026-08-14 | Cormorant Asset Management, LP | 9.99% | 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.