Updated Jul 16, 2026 · Last SEC filing 2026-07-07
Korro Bio, Inc. (KRRO) has filed 15 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-07. 3 Form 8-K material event filings were reported by KRRO in the last 90 days. 15 Form 144 notices of proposed sale were filed for KRRO stock. InsiderAlpha tracks every KRRO SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001703647 |
|---|
| Form 4 filings (90d) | 15 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 15 |
| Latest Form 4 filing | 2026-07-07 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 817 | $13.96 | $11K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 8.5K | $13.96 | $119K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 86.0K | $14.03 | $1.21M | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 14.7K | $14.03 | $207K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 40.7K | $14.60 | $594K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 666 | $14.98 | $10K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 7.0K | $14.60 | $102K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 114 | $14.98 | $2K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 17.4K | $14.25 | $248K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 101.6K | $14.25 | $1.45M | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 580 | $13.95 | $8K | SEC | |
| FORMELA JEAN FRANCOIS | Insider | S — Open-market sale | 3.4K | $13.95 | $47K | SEC | |
| Dolan Oliver | Senior Vice President, Finance | S — Open-market sale | 3.4K | $10.83 | $37K | SEC | |
| Vincent Loic A | Chief Scientific Officer | S — Open-market sale | 3.4K | $10.83 | $37K | SEC | |
| Cerio Jeffrey | General Counsel | S — Open-market sale | 6.6K | $10.83 | $72K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Korro Bio, Inc. (KRRO). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| FORMELA JEAN FRANCOIS | 15 | $4.04M |
| Aiyar Ram | 2 | $813K |
| Knobil Katharine | 1 | — |
| Cerio Jeffrey | 1 | $72K |
| Dolan Oliver | 1 | $37K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in KRRO insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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