According to recent filings covering the 90 days ending December 12, 2025, the three most significant insider holders at Climb Bio are Director Capital Management, L.P. Ra (2.87Mn shares), Director Stephen Basil Thomas (304.66K shares), President And CEO Aoife Brennan (48.13K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Eti Llc Ai | 5,009,400 | 16 Aug, 2021 | |
| Capital Management, L.P. Ra | 2,866,375 | 01 Jul, 2024 | |
| Stephen Basil Thomas | 304,657 | 11 Aug, 2025 | |
| Aoife Brennan | President And CEO | 48,132 | 01 Jul, 2025 |
| Valerie Morisset | EVP And R&D And Cso | 31,317 | 23 Jul, 2024 |
| Emily Pimblett | SVP And Finance & Cao | 18,888 | 20 Jun, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 07 Aug, 2025 | Stephen Basil Thomas | Common Stock | A | 100,375 | $0.00 | 304,657 | D | A |
| 27 Jun, 2025 | Aoife Brennan | - | - | 68,750 | D | |||
| 27 Jun, 2025 | Stephen Basil Thomas | Common Stock | A | 25,094 | - | 204,282 | D | M |
| 27 Jun, 2025 | Aoife Brennan | Common Stock | A | 68,750 | - | 68,750 | D | M |
| 30 Jun, 2025 | Aoife Brennan | - | - | 48,132 | D | |||
| 30 Jun, 2025 | Aoife Brennan | Common Stock | D | 20,618 | $1.22 | 48,132 | D | S |
| 18 Jun, 2025 | Emily Pimblett | Common Stock | A | 5,000 | - | 20,130 | D | M |
| 18 Jun, 2025 | Emily Pimblett | - | - | 20,130 | D | |||
| 20 Jun, 2025 | Emily Pimblett | - | - | 18,888 | D | |||
| 20 Jun, 2025 | Emily Pimblett | Common Stock | D | 1,242 | $1.24 | 18,888 | D | S |
| 27 Mar, 2025 | Stephen Basil Thomas | Common Stock | A | 25,093 | - | 179,188 | D | M |
| 18 Mar, 2025 | Emily Pimblett | Common Stock | A | 5,000 | - | 16,329 | D | M |
| 20 Mar, 2025 | Emily Pimblett | Common Stock | D | 1,199 | $1.31 | 15,130 | D | S |
| 01 Jan, 2025 | Stephen Basil Thomas | Common Stock | A | 50,188 | - | 154,095 | D | M |
| 18 Dec, 2024 | Emily Pimblett | Common Stock | A | 5,000 | - | 12,564 | D | M |
| 19 Dec, 2024 | Emily Pimblett | Common Stock | D | 1,235 | $2.02 | 11,329 | D | S |
| 18 Sep, 2024 | Emily Pimblett | Common Stock | A | 5,000 | - | 8,755 | D | M |
| 20 Sep, 2024 | Emily Pimblett | Common Stock | D | 1,182 | $8.18 | 7,573 | D | S |
| 20 Sep, 2024 | Emily Pimblett | Common Stock | D | 9 | $8.06 | 7,564 | D | S |
| 19 Jul, 2024 | Valerie Morisset | Common Stock | D | 10,201 | $7.09 | 150,322 | D | S |