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The shares were sold in multiple transactions at prices ranging from $13.51 to $13.85, inclusive. Full information regarding the number of shares sold at each separate price can be provided to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission upon request."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 16,241 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 10,741 shares that will vest on December 15, 2026, 2,750 shares that will vest on July 15, 2027, and 2,750 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date."}],"balance_after":16241,"source":{"system":"sec-edgar","filing":"0001193125-26-390556","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312526390556/ownership.xml","form_type":"4"}},{"id":4614521,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Common Stock","published_at":"2026-09-10T20:05:03.000Z","date":"2026-09-09","kind":"sale","planned":true,"acquired":false,"shares":6,"price":13.6033,"value":81.6198,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 8, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $13.52 to $13.76, inclusive. Full information regarding the number of shares sold at each separate price can be provided to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission upon request."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 16,241 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 10,741 shares that will vest on December 15, 2026, 2,750 shares that will vest on July 15, 2027, and 2,750 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date."}],"balance_after":16246,"source":{"system":"sec-edgar","filing":"0001193125-26-387852","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312526387852/ownership.xml","form_type":"4"}},{"id":4614520,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Common Stock","published_at":"2026-09-10T20:05:03.000Z","date":"2026-09-08","kind":"sale","planned":true,"acquired":false,"shares":7347,"price":13.5138,"value":99285.8886,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 8, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $13.50 to $13.595, inclusive. Full information regarding the number of shares sold at each separate price can be provided to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission upon request."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 16,241 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 10,741 shares that will vest on December 15, 2026, 2,750 shares that will vest on July 15, 2027, and 2,750 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date."}],"balance_after":16252,"source":{"system":"sec-edgar","filing":"0001193125-26-387852","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312526387852/ownership.xml","form_type":"4"}},{"id":707126,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Common Stock","published_at":"2026-07-17T11:11:03.000Z","date":"2026-07-15","kind":"grant","planned":false,"acquired":true,"shares":5500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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 July 15, 2027 and 50% on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 16,241 shares of common stock issuable upon settlement of restricted stock units (RSUs) that remain unvested, consisting of 10,741 shares that will vest on December 15, 2026, 2,750 shares that will vest on July 15, 2027, and 2,750 shares that will vest on July 15, 2028, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date."}],"balance_after":23599,"source":{"system":"sec-edgar","filing":"0001193125-26-306742","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312526306742/ownership.xml","form_type":"4"}},{"id":734574,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Common Stock","published_at":"2026-06-17T20:05:26.000Z","date":"2026-06-16","kind":"sale","planned":false,"acquired":false,"shares":3383,"price":10.83,"value":36637.89,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents the mandatory sale of shares of common stock solely to satisfy tax withholding obligations incurred upon vesting and settlement of a restricted stock unit (RSU) granted under the Issuer's 2023 Stock Option and Incentive Plan (the 2023 Plan)."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $10.58 to $11.35, inclusive. Full information regarding the number of shares sold at each separate price can be provided to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission upon request."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 10,741 shares of common stock issuable upon settlement of a RSU granted under the 2023 Plan that will vest on December 15, 2026 subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through such date."}],"balance_after":18099,"source":{"system":"sec-edgar","filing":"0001193125-26-274136","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312526274136/ownership.xml","form_type":"4"}},{"id":922406,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-02-03T21:11:04.000Z","date":"2026-02-02","kind":"grant","planned":false,"acquired":true,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."}],"balance_after":15000,"derivative":{"exercise_price":13.05,"expiration_date":"2036-02-01","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001193125-26-035541","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312526035541/ownership.xml","form_type":"4"}},{"id":967957,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Common Stock","published_at":"2025-12-16T21:05:07.000Z","date":"2025-12-15","kind":"grant","planned":false,"acquired":true,"shares":21482,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"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 June 15, 2026 and 50% on December 15, 2026, in each case subject to the reporting person maintaining a continuous Service Relationship (as defined in the 2023 Plan) through each such date."}],"balance_after":21482,"source":{"system":"sec-edgar","filing":"0001193125-25-320841","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000119312525320841/ownership.xml","form_type":"4"}},{"id":1186812,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":29811,"kind":"person","name":"Dolan Oliver","position":1,"cik":"0002053835","reported_name":"Dolan Oliver","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, Finance"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-04-02T01:46:19.000Z","date":"2025-04-01","kind":"grant","planned":false,"acquired":true,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares subject to the option vest in 48 equal monthly installments commencing from March 27, 2025, subject to the Reporting Person's continued service on each such vesting date."}],"balance_after":20000,"derivative":{"exercise_price":15.95,"expiration_date":"2035-03-26","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000950170-25-048848","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2053835/000095017025048848/ownership.xml","form_type":"4"}}]}