KYMR's three largest insider shareholders as of May 30, 2026 are Bros. Advisors Lp Baker (Director, 7.96Mn shares), Venture Fund X, L.P. Atlas (TenPercentOwner, 5.50Mn shares), Bruce Booth (Director, 1.05Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Partners L P/Il Bvf | - | 353,412 | 0 | 01 Jul, 2025 |
| Bros. Advisors Lp Baker | - | 0 | 7,955,916 | 11 Dec, 2025 |
| Jeremy G Chadwick | Chief Operating Officer | 61,202 | 0 | 24 Apr, 2026 |
| Ellen Chiniara | Chief Legal Officer | 80,085 | 0 | 03 Mar, 2025 |
| Bruce Booth | - | 0 | 1,049,540 | 01 Nov, 2022 |
| Venture Fund X, L.P. Atlas | - | 4,676,075 | 828,830 | 13 Mar, 2024 |
| Brian Adams | Chief Legal Officer | 56,625 | 0 | 04 Mar, 2026 |
| Bruce N. Jacobs | Chief Financial Officer | 232,588 | 0 | 04 Mar, 2026 |
| Nello Mainolfi | Chief Executive Officer | 666,195 | 0 | 25 Feb, 2026 |
| Jared Gollob | Chief Medical Officer | 117,134 | 0 | 04 Mar, 2026 |
| Elaine Caughey | Chief Business Officer | 18,986 | 0 | 03 Mar, 2023 |
| Noah Goodman | Chief Business Officer | 50,195 | 0 | 16 Apr, 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 |
|---|---|---|---|---|---|---|---|---|
| 22 Apr, 2026 | Bruce Booth | Common Stock | A | 5,641 | $14.18 | 5,641 | D | M |
| 22 Apr, 2026 | Jeremy G Chadwick | Common Stock | A | 100 | $30.17 | 61,302 | D | M |
| 22 Apr, 2026 | Bruce Booth | Common Stock | A | 259 | $20.00 | 5,900 | D | M |
| 22 Apr, 2026 | Jeremy G Chadwick | Common Stock | A | 200 | $43.50 | 61,502 | D | M |
| 22 Apr, 2026 | Bruce Booth | Common Stock | D | 5,900 | $89.96 | 0 | D | S |
| 22 Apr, 2026 | Jeremy G Chadwick | Common Stock | D | 300 | $90.00 | 61,202 | D | S |
| 22 Apr, 2026 | Bruce Booth | Common Stock | D | 88 | $90.08 | 3,899,829 | I | S |
| 22 Apr, 2026 | Jeremy G Chadwick | Stock Option (Right to Buy) | D | 100 | $0.00 | 45,434 | D | M |
| 22 Apr, 2026 | Jeremy G Chadwick | Stock Option (Right to Buy) | D | 200 | $0.00 | 58,263 | D | M |
| 22 Apr, 2026 | Bruce Booth | Common Stock | D | 12 | $90.08 | 674,944 | I | S |
| 22 Apr, 2026 | Bruce Booth | Stock Option (Right to Buy) | D | 5,641 | $0.00 | 0 | D | M |
| 22 Apr, 2026 | Bruce Booth | Stock Option (Right to Buy) | D | 259 | $0.00 | 39,868 | D | M |
| 14 Apr, 2026 | Bruce Booth | Common Stock | A | 4,159 | $14.18 | 4,159 | D | M |
| 14 Apr, 2026 | Jeremy G Chadwick | Common Stock | A | 4,466 | $30.17 | 65,668 | D | M |
| 14 Apr, 2026 | Noah Goodman | Common Stock | D | 1,347 | $90.00 | 50,195 | D | S |
| 14 Apr, 2026 | Jeremy G Chadwick | Common Stock | A | 785 | $43.50 | 66,453 | D | M |
| 14 Apr, 2026 | Bruce Booth | Common Stock | D | 4,159 | $89.97 | 0 | D | S |
| 15 Apr, 2026 | Bruce Booth | Common Stock | A | 2,200 | $14.18 | 2,200 | D | M |
| 14 Apr, 2026 | Jeremy G Chadwick | Common Stock | D | 5,251 | $90.00 | 61,202 | D | S |
| 15 Apr, 2026 | Jeremy G Chadwick | Common Stock | A | 1,300 | $43.50 | 62,502 | D | M |