Form 4 for BOLD Boundless Bio, Inc.
Accepted 2026-07-06 17:44:44 ET · period of report 2026-07-01 · accession 0001012975-26-000622 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DI | 2026-07-06 17:44 | 2026-07-01 | BOLD | CRANDELL KEITH | 10% | M - OptEx | $1.03 | +16.0K | 16.0K | New | +$16.5K |
| DI | 2026-07-06 17:44 | 2026-07-01 | BOLD | CRANDELL KEITH | 10% | S - Sale+OE | $2.49 | -16.0K | 0 | -100% | -$39.8K |
| DI | 2026-07-06 17:44 | 2026-07-01 | BOLD | CRANDELL KEITH | 10% | M - OptEx | $0.00 | -16.0K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-07-01 | M | A | 16,000 | $1.03 | 16,000 | I See footnote | — | — | (F1) Represents a cashless stock option exercise by Kristina Burow. The net proceeds of such exercise were remitted to ARCH Venture Fund IX, L.P. (ARCH IX), ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage), and ARCH Venture Fund X, L.P. (AVF X Overage LP). The stock option was granted to Kristina Burow in connection with her service on the board of directors of the Issuer. |
| 2 | Common | Common Stock | 2026-07-01 | S | D | 16,000 | $2.49 | 0 | I See footnote | — | — | (F1) Represents a cashless stock option exercise by Kristina Burow. The net proceeds of such exercise were remitted to ARCH Venture Fund IX, L.P. (ARCH IX), ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage), and ARCH Venture Fund X, L.P. (AVF X Overage LP). The stock option was granted to Kristina Burow in connection with her service on the board of directors of the Issuer. |
| 3 | Derivative | Stock Option (right to buy) | 2026-07-01 | M | D | 16,000 | $0.00 | 0 | I See footnote | $1.03 · — to 2035-06-22 | 16,000 Common Stock | (F7) The stock option vested in substantially equal monthly installments over the 11 months following June 23, 2025. The final unvested portion vested on June 15, 2026, the date of the Issuer's 2026 annual meeting of stockholders. (F1) Represents a cashless stock option exercise by Kristina Burow. The net proceeds of such exercise were remitted to ARCH Venture Fund IX, L.P. (ARCH IX), ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage), and ARCH Venture Fund X, L.P. (AVF X Overage LP). The stock option was granted to Kristina Burow in connection with her service on the board of directors of the Issuer. |