Insider holders · CIK 0001782303
Boundless Bio, Inc. · BOLD
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| TANG CAPITAL MANAGEMENT LLC10% Owner | — | 2,840,635 | 2,840,635 | Aug 28, 2026 · 4:16 pm EDT | Form 4 |
| Kevin Tang10% Owner | — | 2,840,635 | 2,840,635 | Aug 28, 2026 · 4:16 pm EDT | Form 4 |
| ARCH Venture Partners X, LLC10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Partners X Overage, L.P.10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Fund X Overage, L.P.10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Partners IX, LLC10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Partners IX, L.P.10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Partners IX Overage, L.P.10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Fund IX Overage, L.P.10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| ARCH Venture Fund IX, L.P.10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:43 pm EDT | Form 4 |
| Kristina Burow10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:44 pm EDT | Form 4 |
| Steven Gillis10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:44 pm EDT | Form 4 |
| Clinton Bybee10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:44 pm EDT | Form 4 |
| Robert Nelsen10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:44 pm EDT | Form 4 |
| Keith Crandell10% Owner | — | 1,181,766 | 1,181,766 | Jul 6, 2026 · 5:44 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.