As of September 29, 2026, Climb Bio's top three insider holders are Capital Management, L.P. Ra (Director, 3.40Mn shares), Stephen Basil Thomas (Director, 467.97K shares), Aoife Brennan (President And Ceo, 87.73K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Capital Management, L.P. Ra | Director, TenPercentOwner | 0 | 3,403,429 | 3,403,429 | 84.9% | 07 Jan, 2026 |
| 2 | Stephen Basil Thomas | Director | 467,969 | 0 | 467,969 | 11.7% | 17 Sep, 2026 |
| 3 | Aoife Brennan | President And Ceo | 87,731 | 0 | 87,731 | 2.2% | 30 Jun, 2026 |
| 4 | Valerie Morisset | Evp, Rd And Cso | 31,317 | 0 | 31,317 | 0.8% | 23 Jul, 2024 |
| 5 | Emily Pimblett | Svp, Finance Cao | 18,888 | 0 | 18,888 | 0.5% | 20 Jun, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Sep, 2026 | Stephen Basil Thomas | Director | Disposed S | 100,000 | $13.67 | $1.37Mn | 467,969 | Direct |
| 29 Jun, 2026 | Breanna Maurine Celebi | Director | Acquired A | 70,284 | $0.00 | $0 | 70,284 | Direct |
| 29 Jun, 2026 | Capital Management, L.P. Ra | Director, TenPercentOwner | Acquired A | 70,284 | $0.00 | $0 | 70,284 | Indirect |
| 27 Jun, 2026 | Aoife Brennan | President And Ceo | Acquired M | 68,750 | — | — | 118,633 | Direct |
| 29 Jun, 2026 | Aoife Brennan | President And Ceo | Disposed S | 30,902 | $13.17 | $406.98K | 87,731 | Direct |
| 27 Jun, 2026 | Aoife Brennan | President And Ceo | Disposed M | 68,750 | $0.00 | $0 | 137,500 | Direct |
| 05 Jun, 2026 | Alexander Cumbo | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 05 Jun, 2026 | Stephen Basil Thomas | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 05 Jun, 2026 | Capital Management, L.P. Ra | Director, TenPercentOwner | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Indirect |
| 05 Jun, 2026 | Andrew David Levin | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 05 Jun, 2026 | Kimberlee C Drapkin | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 05 Jun, 2026 | Judith Dunn | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 05 Jun, 2026 | Douglas E Williams | Director | Acquired A | 40,000 | $0.00 | $0 | 40,000 | Direct |
| 29 Apr, 2026 | Capital Management, L.P. Ra | Director, TenPercentOwner | Acquired A | 2,106,000 | $9.50 | $20.01Mn | 22,546,000 | Indirect |
| 25 Feb, 2026 | Stephen Basil Thomas | Director | Disposed S | 33,687 | $7.00 | $235.96K | 170,970 | Direct |
| 26 Feb, 2026 | Stephen Basil Thomas | Director | Disposed S | 16,313 | $7.01 | $114.29K | 154,657 | Direct |
| 12 Feb, 2026 | Stephen Basil Thomas | Director | Disposed S | 90,000 | $5.23 | $470.99K | 214,657 | Direct |
| 13 Feb, 2026 | Stephen Basil Thomas | Director | Disposed S | 10,000 | $5.81 | $58.14K | 204,657 | Direct |
| 06 Jan, 2026 | Perrin Megan Wilson | Chief Business Officer | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 06 Jan, 2026 | Cindy Driscoll | Senior Vice President, Finance | Acquired A | 100,000 | $0.00 | $0 | 100,000 | Direct |