KRRO insider transaction filings
Korro Bio, Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-15. Screen KRRO transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 14 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 2 legs across 1 filing by 2 insiders — 6,684 shares, $78,809 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 26 legs across 9 filings by 3 insiders — 374,189 shares, $5,282,738 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 4.
- Largest priced transaction: sale of 101,579 shares @ $14.25 ($1,447,501) by FORMELA JEAN FRANCOIS, filed 2026-06-24.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| FORMELA JEAN FRANCOIS — Director | 6 | — | 22 legs · 361,029 sh · $5,120,386 | — |
| Dolan Oliver — Senior Vice President, Finance | 3 | — | 3 legs · 7,358 sh · $99,436 | 1 |
| Lynx1 Capital Management LP — 10% owner & Nichols Weston — 10% owner | 1 | 2 legs · 6,684 sh · $78,809 | — | — |
| Aiyar Ram — President and CEO, Director | 1 | — | 1 leg · 5,802 sh · $62,917 | — |
| Cerio Jeffrey — General Counsel | 1 | — | — | 1 |
| Chappell Todd — Chief Operating Officer | 1 | — | — | 1 |
| Vincent Loic A — Chief Scientific Officer | 1 | — | — | 1 |
Recent Form 4 filings — Korro Bio, Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-15 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 8,450 @ $13.99 · Sale (S): 1,750 @ $13.99 · Sale (S): 31,888 @ $14.12 · Sale (S): 6,602 @ $14.12 | EDGAR |
| 2026-09-14 | 4 | Dolan Oliver — Senior Vice President, Finance | Sale (S): 5 @ $13.72 | EDGAR |
| 2026-09-10 | 4 | Dolan Oliver — Senior Vice President, Finance | Sale (S): 7,347 @ $13.51 · Sale (S): 6 @ $13.60 | EDGAR |
| 2026-08-28 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 249 @ $13.96 · Sale (S): 51 @ $13.96 | EDGAR |
| 2026-08-21 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 23,584 @ $14 · Sale (S): 4,884 @ $14 | EDGAR |
| 2026-08-13 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 1,775 @ $13.96 · Sale (S): 368 @ $13.96 | EDGAR |
| 2026-08-13 | 4 | Lynx1 Capital Management LP — 10% owner Nichols Weston — 10% owner | Purchase (P): 5,222 @ $11.40 · Purchase (P): 1,462 @ $13.19 | EDGAR |
| 2026-08-05 | 4 | Aiyar Ram — President and CEO, Director | Sale (S): 5,802 @ $10.84 | EDGAR |
| 2026-07-17 | 4 | Vincent Loic A — Chief Scientific Officer | Grant/award (A): 7,500 @ $0 | EDGAR |
| 2026-07-17 | 4 | Dolan Oliver — Senior Vice President, Finance | Grant/award (A): 5,500 @ $0 | EDGAR |
| 2026-07-17 | 4 | Cerio Jeffrey — General Counsel | Grant/award (A): 6,500 @ $0 | EDGAR |
| 2026-07-17 | 4 | Chappell Todd — Chief Operating Officer | Grant/award (A): 7,500 @ $0 | EDGAR |
| 2026-07-07 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 85,955 @ $14.03 · Sale (S): 14,745 @ $14.03 · Sale (S): 817 @ $13.96 · Sale (S): 8,506 @ $13.96 | EDGAR |
| 2026-06-24 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 3,382 @ $13.95 · Sale (S): 580 @ $13.95 · Sale (S): 101,579 @ $14.25 · Sale (S): 17,426 @ $14.25 · Sale (S): 40,679 @ $14.60 · Sale (S): 666 @ $14.98 · +2 more | EDGAR |
| 2026-06-17 | 4 | Chappell Todd — Chief Operating Officer | Sale (S): 3,168 @ $10.83 | EDGAR |
| 2026-06-17 | 4 | Vincent Loic A — Chief Scientific Officer | Sale (S): 3,418 @ $10.83 | EDGAR |
| 2026-06-17 | 4 | Cerio Jeffrey — General Counsel | Sale (S): 6,609 @ $10.83 | EDGAR |
| 2026-06-17 | 4 | Dolan Oliver — Senior Vice President, Finance | Sale (S): 3,383 @ $10.83 | EDGAR |
| 2026-06-11 | 4 | Meyers Rachel — Director | Grant/award (A): 14,677 (derivative) @ $0 | EDGAR |
| 2026-06-11 | 4 | Knobil Katharine — Director | Grant/award (A): 14,677 (derivative) @ $0 | EDGAR |
| 2026-06-11 | 4 | Behbahani Ali — Director | Grant/award (A): 14,677 (derivative) @ $0 | EDGAR |
| 2026-06-11 | 4 | PEARSON TIMOTHY R — Director | Grant/award (A): 14,677 (derivative) @ $0 | EDGAR |
| 2026-06-11 | 4 | Bermingham Nessan — Director | Grant/award (A): 14,677 (derivative) @ $0 | EDGAR |
| 2026-06-11 | 4 | FORMELA JEAN FRANCOIS — Director | Grant/award (A): 14,677 (derivative) @ $0 | EDGAR |
| 2026-06-02 | 4 | Aiyar Ram — President and CEO, Director | Sale (S): 15,152 @ $12.98 | EDGAR |
| 2026-06-01 | 4 | FORMELA JEAN FRANCOIS — Director | Sale (S): 2,441 @ $13.95 · Sale (S): 419 @ $13.95 | EDGAR |
| 2026-05-28 | 4 | Aiyar Ram — President and CEO, Director | Grant/award (A): 50,000 @ $12.33 | EDGAR |
| 2026-04-02 | 4 | Lynx1 Capital Management LP — 10% owner Nichols Weston — 10% owner | Purchase (P): 520 @ $10.60 | EDGAR |
| 2026-03-12 | 4 | Yang Rick — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | New Enterprise Associates 17, L.P. — 10% owner NEA Partners 17, L.P. — 10% owner NEA 17 GP, LLC — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | Chang Carmen — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | Makhzoumi Mohamad — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | Behbahani Ali — Director, 10% owner | Grant/award (A): 207,100 @ $11.11 · Grant/award (A): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | Florence Anthony A. Jr. — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | Walker Paul Edward — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | Mathers Edward T — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | BASKETT FOREST — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-03-12 | 4 | SANDELL SCOTT D — 10% owner | Purchase (P): 207,100 @ $11.11 · Purchase (P): 242,945 (derivative) @ $11.11 | EDGAR |
| 2026-02-03 | 4 | Aiyar Ram — President and CEO, Director | Grant/award (A): 40,000 @ $0 · Grant/award (A): 80,000 (derivative) @ $0 | EDGAR |
| 2026-02-03 | 4 | Vincent Loic A — Chief Scientific Officer | Grant/award (A): 35,000 (derivative) @ $0 | EDGAR |
| 2026-02-03 | 4 | Dolan Oliver — Senior Vice President, Finance | Grant/award (A): 15,000 (derivative) @ $0 | EDGAR |
| 2026-02-03 | 4 | Cerio Jeffrey — General Counsel | Grant/award (A): 23,000 (derivative) @ $0 | EDGAR |
| 2026-02-03 | 4 | Chappell Todd — Chief Operating Officer | Grant/award (A): 38,000 (derivative) @ $0 | EDGAR |
| 2025-12-16 | 4 | Chappell Todd — Chief Operating Officer | Grant/award (A): 20,132 @ $0 | EDGAR |
| 2025-12-16 | 4 | Vincent Loic A — Chief Scientific Officer | Grant/award (A): 21,715 @ $0 | EDGAR |
| 2025-12-16 | 4 | Cerio Jeffrey — General Counsel | Grant/award (A): 41,902 @ $0 | EDGAR |
| 2025-12-16 | 4 | Dolan Oliver — Senior Vice President, Finance | Grant/award (A): 21,482 @ $0 | EDGAR |
| 2025-06-12 | 4 | PEARSON TIMOTHY R — Director | Grant/award (A): 6,010 (derivative) @ $0 | EDGAR |
| 2025-06-12 | 4 | Bermingham Nessan — Director | Grant/award (A): 6,010 (derivative) @ $0 | EDGAR |
| 2025-06-12 | 4 | FORMELA JEAN FRANCOIS — Director | Grant/award (A): 6,010 (derivative) @ $0 | EDGAR |
Recent 8-K events — Korro Bio, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-19 | 8-K | 8.01 — Other Events | EDGAR |
| 2026-08-06 | 8-K | 1.01 — Entry into a Material Definitive Agreement 2.02 — Results of Operations and Financial Condition 3.02 — Unregistered Sales of Equity Securities 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-11 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-05-19 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-07 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-12 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-09 | 8-K | 1.01 — Entry into a Material Definitive Agreement 2.02 — Results of Operations and Financial Condition 3.02 — Unregistered Sales of Equity Securities 7.01 — Regulation FD Disclosure 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-27 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-15 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-18 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
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