{"transactions":[{"id":890213,"issuer":{"id":6445,"kind":"organization","name":"Caribou Biosciences, Inc."},"owners":[{"id":65378,"kind":"person","name":"Richardson-Heron Dara","position":1,"cik":"0001893193","reported_name":"Richardson-Heron Dara","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option to purchase Common Stock","published_at":"2026-02-20T22:27:53.000Z","date":"2026-02-20","kind":"grant","planned":false,"acquired":true,"shares":45000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2027, subject to the reporting person continuing to provide service to the Issuer through each such vesting date."}],"balance_after":45000,"derivative":{"exercise_price":1.8,"expiration_date":"2036-02-19","underlying":"Common Stock","underlying_shares":45000},"source":{"system":"sec-edgar","filing":"0001893193-26-000003","document":"wk-form4_1771626471.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1619856/000189319326000003/wk-form4_1771626471.xml","form_type":"4"}},{"id":1252242,"issuer":{"id":6445,"kind":"organization","name":"Caribou Biosciences, Inc."},"owners":[{"id":65378,"kind":"person","name":"Richardson-Heron Dara","position":1,"cik":"0001893193","reported_name":"Richardson-Heron Dara","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option to purchase Common Stock","published_at":"2025-02-22T01:15:40.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":40500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2026, subject to the reporting person continuing to provide service to the Issuer\nthrough each such vesting date."}],"balance_after":40500,"derivative":{"exercise_price":1.41,"expiration_date":"2035-02-19","underlying":"Common Stock","underlying_shares":40500},"source":{"system":"sec-edgar","filing":"0001893193-25-000004","document":"wk-form4_1740186934.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1619856/000189319325000004/wk-form4_1740186934.xml","form_type":"4"}},{"id":1624585,"issuer":{"id":6445,"kind":"organization","name":"Caribou Biosciences, Inc."},"owners":[{"id":65378,"kind":"person","name":"Richardson-Heron Dara","position":1,"cik":"0001893193","reported_name":"Richardson-Heron Dara","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option to purchase Common Stock","published_at":"2024-02-22T22:06:12.000Z","date":"2024-02-20","kind":"grant","planned":false,"acquired":true,"shares":39500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 20, 2025, subject to the reporting person continuing to provide service to the Issuer through each such vesting date."}],"balance_after":39500,"derivative":{"exercise_price":6.81,"expiration_date":"2034-02-19","underlying":"Common Stock","underlying_shares":39500},"source":{"system":"sec-edgar","filing":"0001628280-24-006411","document":"wk-form4_1708639530.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1619856/000162828024006411/wk-form4_1708639530.xml","form_type":"4"}},{"id":1995276,"issuer":{"id":6445,"kind":"organization","name":"Caribou Biosciences, Inc."},"owners":[{"id":65378,"kind":"person","name":"Richardson-Heron Dara","position":1,"cik":"0001893193","reported_name":"Richardson-Heron Dara","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option to purchase Common Stock","published_at":"2023-02-23T22:12:59.000Z","date":"2023-02-21","kind":"grant","acquired":true,"shares":21500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"One-twelfth of the shares subject to this option will vest on each monthly anniversary of the grant date such that the option will be fully vested on February 21, 2024,  subject to the reporting person continuing to provide service to the Issuer through each such vesting date."}],"balance_after":21500,"derivative":{"exercise_price":6.12,"expiration_date":"2033-02-20","underlying":"Common Stock","underlying_shares":21500},"source":{"system":"sec-edgar","filing":"0001619856-23-000026","document":"wf-form4_167719034786758.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1619856/000161985623000026/wf-form4_167719034786758.xml","form_type":"4"}},{"id":2512242,"issuer":{"id":6445,"kind":"organization","name":"Caribou Biosciences, Inc."},"owners":[{"id":65378,"kind":"person","name":"Richardson-Heron Dara","position":1,"cik":"0001893193","reported_name":"Richardson-Heron Dara","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option to purchase Common Stock","published_at":"2021-11-15T21:57:18.000Z","date":"2021-11-11","kind":"grant","acquired":true,"shares":44000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option becomes exercisable in three equal annual installments beginning November 11, 2022."}],"balance_after":44000,"derivative":{"exercise_price":20.52,"expiration_date":"2031-11-10","underlying":"Common Stock","underlying_shares":44000},"source":{"system":"sec-edgar","filing":"0001209191-21-064491","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1619856/000120919121064491/doc4.xml","form_type":"4"}}]}