Form 4 for KRRO Korro Bio, Inc.
Accepted 2026-02-03 00:00:00 ET · period of report 2026-02-02 · accession 0001193125-26-035591 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-02-03 | 2026-02-02 | KRRO | Aiyar Ram | Pres, CEO, Dir | A - Grant | $0.00 | +40.0K | 40.0K | New | $0 |
| D | 2026-02-03 | 2026-02-02 | KRRO | Aiyar Ram | Pres, CEO, Dir | A - Grant | $0.00 | +80.0K | 80.0K | New | $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 | 2026-02-02 | A | A | 40,000 | $0.00 | 40,000 | D | — | — | (F1) Represents shares of common stock issuable upon settlement of a restricted stock unit (RSU) granted under the Issuer's 2023 Stock Option and Incentive Plan (the 2023 Plan) that will vest as follows: 50% on August 3, 2026 and 50% on February 1, 2027, in each case subject to the Reporting Person's continued service on each such vesting date. |
| 2 | Derivative | Stock Option (Right to Buy) | 2026-02-02 | A | A | 80,000 | $0.00 | 80,000 | D | $13.05 · — to 2036-02-01 | 80,000 Common Stock | (F3) The shares subject to the option vest in 48 equal monthly installments commencing from February 2, 2026, subject to the Reporting Person's continued service on each such vesting date. |