Climb Bio, Inc. has 9 Schedule 13D or 13G filings on record since 2025-09-18. 3 holders' latest filing reports 5% or more of common stock, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| RA Capital Management, L.P. | 33% | 23,249,186 | SCHEDULE 13D/A, 2026-07-07 | 2026-07-02 |
| Fmr LLC | 11.9% | 6,790,364 | SCHEDULE 13G, 2026-07-08 | 2026-06-30 |
| Pontifax VI G.P. L.P. | 7.7% | 5,206,380 | SCHEDULE 13G, 2025-09-18 | 2024-06-27 |
| Ai Eti LLC | 0% | 0 | SCHEDULE 13D/A, 2025-10-16 | 2025-10-14 |
| MPM BioImpact LLC | 0% | 0 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
Purpose of Transaction (Item 4)
RA Capital Management, L.P.
Item 4 of the Statement is hereby amended and supplemented as follows: On June 29, 2026 Dr. Breanna Celebi (O'Reilly), an Analyst of RA Capital, was appointed to the Board of Directors of the Issuer as the designee of RA Capital, replacing Dr. Andrew Levin, who resigned from the Board of Directors effective June 29, 2026.Item 4 of the SCHEDULE 13D/A filed 2026-07-07
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-09-18 | Pontifax VI G.P. L.P. | 7.7% | SCHEDULE 13G |
| 2025-10-07 | Ai Eti LLC | 5.66% | SCHEDULE 13D/A |
| 2025-10-16 | Ai Eti LLC | 0% | SCHEDULE 13D/A |
| 2025-12-15 | RA Capital Management, L.P. | 33% | SCHEDULE 13D/A |
| 2026-02-17 | MPM BioImpact LLC | 5.6% | SCHEDULE 13G |
| 2026-04-29 | RA Capital Management, L.P. | 33% | SCHEDULE 13D/A |
| 2026-07-07 | RA Capital Management, L.P. | 33% | SCHEDULE 13D/A |
| 2026-07-08 | Fmr LLC | 11.9% | SCHEDULE 13G |
| 2026-08-14 | MPM BioImpact LLC | 0% | 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.