SEC Form 4 · accession 0001030575-26-000008
Korro Bio, Inc. · KRRO
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Jean Francois Formela
Director
Period of report
Aug 11, 2026
Accepted (ET)
Aug 13, 2026 · 5:04 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001703647
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2,F3 | Aug 11, 2026 | S | 1,775 | $13.96 | D | 704,781 | I | See footnote |
| Common StockF2,F4 | Aug 11, 2026 | S | 368 | $13.96 | D | 145,937 | I | See footnote |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on April 8, 2026.
- F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.95 to $14.00 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold each separate price within the range set forth in this footnote.
- F3These shares are held directly by Atlas Venture Fund XI, L.P. ("Atlas XI"). Atlas Venture Associates XI, L.P. ("AVA XI LP") is the general partner of Atlas XI. Atlas Venture Associates XI, LLC ("AVA XI LLC") is the general partner of AVA XI LP. The Reporting Person is a member of AVA XI LLC and disclaims Section 16 beneficial ownership of such shares, except to the extent of his pecuniary interest therein, if any.
- F4These shares are held directly by Atlas Venture Opportunity Fund II, L.P. ("AVOF II"). Atlas Venture Associates Opportunity II, L.P. ("AVAO II LP") is the general partner of AVOF II. Atlas Venture Associates Opportunity II, LLC ("AVAO II LLC") is the general partner of AVAO II LP. The Reporting Person is a member of AVAO II LLC and disclaims Section 16 beneficial ownership of such shares, except to the extent of his pecuniary interest therein, if any.