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There have been no other changes to the terms of these options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option vests and becomes exercisable in equal monthly installments over a four year period commencing on February 1, 2020, and will be fully vested and exercisable on January 1, 2024."}],"balance_after":0,"derivative":{"exercise_price":25.05,"expiration_date":"2030-02-11","underlying":"Common Stock","underlying_shares":57500},"source":{"system":"sec-edgar","filing":"0001127602-22-021376","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222021376/form4.xml","form_type":"4"}},{"id":2178141,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Stock Option","published_at":"2022-08-19T16:04:58.000Z","date":"2022-08-17","kind":"grant","acquired":true,"shares":57500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The transaction reported herein reflects a one-time stock option repricing that became effective on August 17, 2022 and is being reported in this manner solely to comply with the technical reporting requirements under Section 16(a) of the Securities Exchange Act of 1934, as amended. There have been no other changes to the terms of these options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option vests and becomes exercisable in equal monthly installments over a four year period commencing on February 1, 2020, and will be fully vested and exercisable on January 1, 2024."}],"balance_after":57500,"derivative":{"exercise_price":2.14,"expiration_date":"2030-02-11","underlying":"Common Stock","underlying_shares":57500},"source":{"system":"sec-edgar","filing":"0001127602-22-021376","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222021376/form4.xml","form_type":"4"}},{"id":2178140,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Stock Option","published_at":"2022-08-19T16:04:58.000Z","date":"2022-08-17","kind":"disposition_to_issuer","acquired":false,"shares":75000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The transaction reported herein reflects a one-time stock option repricing that became effective on August 17, 2022 and is being reported in this manner solely to comply with the technical reporting requirements under Section 16(a) of the Securities Exchange Act of 1934, as amended. There have been no other changes to the terms of these options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option vests and becomes exercisable in equal monthly installments over a four year period commencing on February 1, 2021, and will be fully vested and exercisable on January 1, 2025."}],"balance_after":0,"derivative":{"exercise_price":35.85,"expiration_date":"2031-01-14","underlying":"Common Stock","underlying_shares":75000},"source":{"system":"sec-edgar","filing":"0001127602-22-021376","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222021376/form4.xml","form_type":"4"}},{"id":2178139,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Stock Option","published_at":"2022-08-19T16:04:58.000Z","date":"2022-08-17","kind":"grant","acquired":true,"shares":75000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The transaction reported herein reflects a one-time stock option repricing that became effective on August 17, 2022 and is being reported in this manner solely to comply with the technical reporting requirements under Section 16(a) of the Securities Exchange Act of 1934, as amended. There have been no other changes to the terms of these options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option vests and becomes exercisable in equal monthly installments over a four year period commencing on February 1, 2021, and will be fully vested and exercisable on January 1, 2025."}],"balance_after":75000,"derivative":{"exercise_price":2.14,"expiration_date":"2031-01-14","underlying":"Common Stock","underlying_shares":75000},"source":{"system":"sec-edgar","filing":"0001127602-22-021376","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222021376/form4.xml","form_type":"4"}},{"id":2178138,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Stock Option","published_at":"2022-08-19T16:04:58.000Z","date":"2022-08-17","kind":"disposition_to_issuer","acquired":false,"shares":178937,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The transaction reported herein reflects a one-time stock option repricing that became effective on August 17, 2022 and is being reported in this manner solely to comply with the technical reporting requirements under Section 16(a) of the Securities Exchange Act of 1934, as amended. There have been no other changes to the terms of these options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests and becomes exercisable in equal monthly installments over a four year period commencing on November 2, 2019, and will be fully vested and exercisable on October 2, 2023."}],"balance_after":0,"derivative":{"exercise_price":14,"expiration_date":"2029-10-01","underlying":"Common Stock","underlying_shares":178937},"source":{"system":"sec-edgar","filing":"0001127602-22-021376","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222021376/form4.xml","form_type":"4"}},{"id":2178137,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Stock Option","published_at":"2022-08-19T16:04:58.000Z","date":"2022-08-17","kind":"grant","acquired":true,"shares":178937,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The transaction reported herein reflects a one-time stock option repricing that became effective on August 17, 2022 and is being reported in this manner solely to comply with the technical reporting requirements under Section 16(a) of the Securities Exchange Act of 1934, as amended. There have been no other changes to the terms of these options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option vests and becomes exercisable in equal monthly installments over a four year period commencing on November 2, 2019, and will be fully vested and exercisable on October 2, 2023."}],"balance_after":178937,"derivative":{"exercise_price":2.14,"expiration_date":"2029-10-01","underlying":"Common Stock","underlying_shares":178937},"source":{"system":"sec-edgar","filing":"0001127602-22-021376","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222021376/form4.xml","form_type":"4"}},{"id":2210692,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Restricted Stock Unit","published_at":"2022-07-07T16:47:51.000Z","date":"2022-07-05","kind":"exercise","acquired":false,"shares":15000,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The restricted stock units will vest as to 50% on February 14, 2022 and 50% on July 4, 2022."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Each restricted stock unit represents a contingent right to receive one share of Issuer common stock."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001127602-22-019045","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1439275/000112760222019045/form4.xml","form_type":"4"}},{"id":2210691,"issuer":{"id":6388,"kind":"organization","name":"Korro Bio, Inc.","symbol":"KRRO"},"owners":[{"id":117593,"kind":"person","name":"LeBel Carl","position":1,"cik":"0001439275","reported_name":"LeBel Carl","relationship":{"officer":true,"officer_title":"Chief Development Officer"}}],"security":"Common Stock","published_at":"2022-07-07T16:47:51.000Z","date":"2022-07-06","kind":"sale","acquired":false,"shares":4421,"price":1.52,"value":6719.92,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of the restricted stock units and does not represent discretionary trades by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades through a broker-dealer at prices ranging from $1.49 to $1.56. The price reported in this column reflects the weighted average sales price. 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The price reported in this column reflects the weighted average sales price. 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The price reported in this column reflects the weighted average sales price. 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The price reported in this column reflects the weighted average sales price. 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