As of April 17, 2026, the three largest insider holders of BOLT are Holdings A/S Novo (TenPercentOwner, 3.70Mn shares), Capital Viii, Llc Vivo (TenPercentOwner, 2.33Mn shares), Capital Viii, Llc Vivo (TenPercentOwner, 1.98Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Holdings A/S Novo | - | 3,703,991 | 0 | 15 Jul, 2022 |
| Capital Viii, Llc Vivo | - | 0 | 2,333,551 | 22 Nov, 2023 |
| Capital Viii, Llc Vivo | - | 0 | 1,981,474 | 20 Nov, 2023 |
| Capital Viii, Llc Vivo | - | 0 | 1,954,009 | 20 Nov, 2023 |
| Grant Yonehiro | Chief Operating Officer | 38,918 | 0 | 24 Oct, 2025 |
| Edith A. Perez | Chief Medical Officer | 37,042 | 0 | 02 Feb, 2022 |
| Sarah Nemec | Senior Vp, Finance And Pao | 1,415 | 0 | 04 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 |
|---|---|---|---|---|---|---|---|---|
| 05 Dec, 2025 | Sarah Nemec | Common Stock | A | 125 | $4.61 | 1,415 | D | P |
| 28 Jan, 2026 | Grant Yonehiro | Employee Stock Option (Right to Buy) | A | 10,000 | $0.00 | 10,000 | D | A |
| 28 Jan, 2026 | Sarah Nemec | Employee Stock Option (Right to Buy) | A | 8,000 | $0.00 | 8,000 | D | A |
| 12 Dec, 2025 | Brian O'Callaghan | Director Stock Option (Right to Buy) | A | 1,393 | - | 1,393 | D | A |
| 12 Dec, 2025 | Grant Yonehiro | Employee Stock Option (Right to Buy) | A | 3,214 | - | 3,214 | D | A |
| 12 Dec, 2025 | Laura Berner | Director Stock Option (Right to Buy) | A | 2,500 | - | 2,500 | D | A |
| 12 Dec, 2025 | Sarah Nemec | Employee Stock Option (Right to Buy) | A | 1,236 | - | 1,236 | D | A |
| 12 Dec, 2025 | Sarah Nemec | Employee Stock Option (Right to Buy) | D | 1,236 | - | 0 | D | D |
| 12 Dec, 2025 | Grant Yonehiro | Employee Stock Option (Right to Buy) | D | 3,214 | - | 0 | D | D |
| 12 Dec, 2025 | Laura Berner | Director Stock Option (Right to Buy) | D | 2,500 | - | 0 | D | D |
| 12 Dec, 2025 | Brian O'Callaghan | Director Stock Option (Right to Buy) | D | 1,393 | - | 0 | D | D |
| 12 Dec, 2025 | Brian O'Callaghan | Director Stock Option (Right to Buy) | A | 1,810 | - | 1,810 | D | A |
| 12 Dec, 2025 | Grant Yonehiro | Employee Stock Option (Right to Buy) | A | 660 | - | 660 | D | A |
| 12 Dec, 2025 | Sarah Nemec | Employee Stock Option (Right to Buy) | A | 375 | - | 375 | D | A |
| 12 Dec, 2025 | Laura Berner | Director Stock Option (Right to Buy) | A | 613 | - | 613 | D | A |
| 12 Dec, 2025 | Grant Yonehiro | Employee Stock Option (Right to Buy) | D | 660 | - | 0 | D | D |
| 12 Dec, 2025 | Brian O'Callaghan | Director Stock Option (Right to Buy) | D | 1,810 | - | 0 | D | D |
| 12 Dec, 2025 | Sarah Nemec | Employee Stock Option (Right to Buy) | D | 375 | - | 0 | D | D |
| 12 Dec, 2025 | Laura Berner | Director Stock Option (Right to Buy) | D | 613 | - | 0 | D | D |
| 12 Dec, 2025 | Grant Yonehiro | Employee Stock Option (Right to Buy) | A | 822 | - | 822 | D | A |