Keros Therapeutics's three largest insider shareholders as of May 30, 2026 are Ran Nussbaum (Director, 1.23Mn shares), Management 4 G.P. (2015) Ltd. Pontifax (TenPercentOwner, 1.23Mn shares), Tomer Kariv (Director, 1.23Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Advisors Llc Orbimed | - | 0 | 45,057 | 18 Dec, 2025 |
| Jean Jacques Bienaime | - | 8,450 | 0 | 17 Apr, 2026 |
| Mary Ann Gray | - | 5,250 | 0 | 06 Jun, 2025 |
| Carl L Gordon | - | 0 | 45,057 | 18 Dec, 2025 |
| Tomer Kariv | - | 0 | 1,226,412 | 30 Nov, 2022 |
| Ran Nussbaum | - | 0 | 1,226,412 | 30 Nov, 2022 |
| Christopher Rovaldi | Chief Operating Officer | 60,000 | 0 | 19 Feb, 2025 |
| Alpna Seth | - | 5,250 | 0 | 06 Jun, 2025 |
| Management 4 G.P. (2015) Ltd. Pontifax | - | 0 | 1,226,412 | 30 Nov, 2022 |
| Jasbir Seehra | Chief Executive Officer | 440,708 | 0 | 06 Apr, 2026 |
| Yung H. Chyung | Chief Medical Officer | 44,000 | 0 | 19 Feb, 2025 |
| Nima Farzan | - | 5,250 | 0 | 06 Jun, 2025 |
| Jennifer Lachey | Chief Scientific Officer | 95,100 | 0 | 19 Jul, 2022 |
| Julius Knowles | - | 0 | 102,233 | 18 Dec, 2025 |
| Charles W. Newton | - | 13,215 | 0 | 11 Mar, 2026 |
| Lorena Raquel Lerner | Chief Science Officer | 31,127 | 0 | 20 Feb, 2026 |
| Esther Cho | Svp, General Counsel | 39,755 | 0 | 20 Feb, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 15 Apr, 2026 | Jean Jacques Bienaime | Common Stock | A | 1,000 | $11.70 | 8,450 | D | P |
| 02 Apr, 2026 | Jasbir Seehra | Common Stock | A | 55,000 | $0.30 | 440,708 | D | M |
| 02 Apr, 2026 | Jasbir Seehra | Employee Stock Option (Right to Buy) | D | 55,000 | $0.00 | 197,444 | D | M |
| 24 Feb, 2026 | Esther Cho | Employee Stock Option (Right to Buy) | A | 80,000 | $0.00 | 80,000 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Common Stock | A | 13,215 | $0.00 | 13,215 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Common Stock | A | 13,215 | $0.00 | 13,215 | D | A |
| 09 Mar, 2026 | Jean Jacques Bienaime | Common Stock | A | 2,000 | $11.21 | 7,450 | D | P |
| 09 Mar, 2026 | Charles W. Newton | Common Stock | A | 13,215 | $0.00 | 13,215 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Common Stock | A | 13,215 | $0.00 | 13,215 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Stock Option (Right to Buy) | A | 14,788 | $0.00 | 14,788 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Stock Option (Right to Buy) | A | 14,788 | $0.00 | 14,788 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Stock Option (Right to Buy) | A | 14,788 | $0.00 | 14,788 | D | A |
| 09 Mar, 2026 | Charles W. Newton | Stock Option (Right to Buy) | A | 14,788 | $0.00 | 14,788 | D | A |
| 24 Feb, 2026 | Lorena Raquel Lerner | Employee Stock Option (Right to Buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 24 Feb, 2026 | Esther Cho | Employee Stock Option (Right to Buy) | A | 80,000 | $0.00 | 80,000 | D | A |
| 24 Feb, 2026 | Lorena Raquel Lerner | Employee Stock Option (Right to Buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 24 Feb, 2026 | Lorena Raquel Lerner | Employee Stock Option (Right to Buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 24 Feb, 2026 | Lorena Raquel Lerner | Employee Stock Option (Right to Buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 18 Feb, 2026 | Lorena Raquel Lerner | Common Stock | D | 3,873 | $16.35 | 31,127 | D | S |
| 18 Feb, 2026 | Lorena Raquel Lerner | Common Stock | D | 3,873 | $16.35 | 31,127 | D | S |