144 0001885327 XXXXXXXX LIVE 0001703647 Korro Bio, Inc. 001-39062 60 First Street 2nd Floor, Suite 250 Cambridge MA 02141 6174681999 Atlas Venture Opportunity Fund II, L.P. Shareholder Common Stock Merrill Lynch 555 California Street 18th Floor San Francisco CA 94104 3661 47556.39 14422571 06/22/2026 Nasdaq Common Stock 04/22/2024 Private Placement Issuer N 3661 04/22/2024 Cash N Atlas Venture Fund XI, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139 Common Stock 05/28/2026 2441 34051.95 Atlas Venture Opportunity Fund II, L.P. 300 Technology Sq Ste 8 Cambridge MA 02139 Common Stock 05/28/2026 419 5845.05 06/22/2026 04/08/2026 Ommer Chohan