List of insiders holdings for Boundless Bio Inc.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | ARCH Venture Fund IX L.P. ARCH Venture Fund IX Overage L.P. ARCH Venture Fund X Overage L.P. ARCH Venture Partners IX L.P. ARCH Venture Partners IX Overage L.P. ARCH Venture Partners X Overage L.P. ARCH Venture Partners IX LLC ARCH Venture Partners X LLC 10% Owner | 2024-10-29 18:32:08 | 2,699,970 0 | 2,699,970 | Form 13D |
| 2 | CRANDELL KEITH BYBEE CLINTON NELSEN ROBERT GILLIS STEVEN 10% Owner | 2024-04-04 16:30:41 | 0 1,181,766 | 1,181,766 | Form 4 |
| 3 | Hornby Zachary President & CEO | 2026-01-26 07:00:04 | 600,000 0 | 600,000 | Form 4 |
| 4 | Wellington Biomedical Innovation Master Investors (Cayman) I L.P. 10% Owner | 2024-04-02 20:42:06 | 556,233 0 | 556,233 | Form 4 |
| 5 | Wagner Klaus W. Chief Medical Officer | 2024-08-20 19:06:01 | 316,895 0 | 316,895 | Form 4 |
| 6 | Rubin Jami Chief Financial Officer | 2024-08-20 19:03:38 | 280,554 0 | 280,554 | Form 4 |
| 7 | Hassig Christian Chief Scientific Officer | 2026-01-26 07:00:07 | 230,000 0 | 230,000 | Form 4 |
| 8 | Doebele Robert Chief Medical Officer | 2026-01-26 07:00:06 | 230,000 0 | 230,000 | Form 4 |
| 9 | Oien Jessica See Remarks | 2026-01-26 07:00:09 | 220,000 0 | 220,000 | Form 4 |
| 10 | Abdollahian Neil Chief Business Officer | 2024-08-20 19:08:58 | 216,913 0 | 216,913 | Form 4 |
| 11 | HINKLE DAVID A See Remarks | 2026-01-26 07:00:03 | 140,000 0 | 140,000 | Form 4 |
| 12 | Lim Jonathan E Director | 2025-06-23 17:13:59 | 24,000 0 | 24,000 | Form 4 |
| 13 | Brennan Christine Director | 2025-06-23 17:21:20 | 16,000 0 | 16,000 | Form 4 |
| 14 | Christensen James Director | 2025-06-23 17:16:53 | 16,000 0 | 16,000 | Form 4 |
| 15 | Lew Jennifer Director | 2025-06-23 17:15:17 | 16,000 0 | 16,000 | Form 4 |
| 16 | Burow Kristina Director 10% Owner | 2025-06-23 17:11:29 | 16,000 0 | 16,000 | Form 4 |
| 17 | Whiting Nancy Director | 2025-06-23 17:09:35 | 16,000 0 | 16,000 | Form 4 |
| 18 | RA CAPITAL MANAGEMENT L.P. RA Capital Healthcare Fund LP RA Capital Nexus Fund II L.P. Kolchinsky Peter Shah Rajeev M. 10% Owner | 2025-08-14 17:57:29 | 0 0 | 0 | Form 13G |