{"schema_version":"secwatch.filing_event.v1","accession":"0001619856-24-000074","form_type":"8-K/A","ticker":"CRBU","cik":"0001619856","company_name":"Caribou Biosciences, Inc.","filed_at":"2024-09-27T23:59:59+00:00","discovered_at":"2026-05-14T18:03:13.825567+00:00","generated_at":"2026-05-31T01:10:33.776229+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Caribou Biosciences appoints Ryan Fischesser interim CFO and grants 25,000 RSUs","bullets":["Ryan Fischesser designated interim principal financial officer and accounting officer effective Sept 27, 2024, following Jason O'Byrne's resignation.","Fischesser to receive 25,000 RSUs on Nov 20, 2024, vesting fully on Nov 20, 2025, subject to continued employment.","The original 8-K filed Sept 3, 2024 reported O'Byrne's resignation; this amendment supplements compensatory terms.","Fischesser previously served as VP of Finance and Controller."],"urls":{"canonical":"https://secwatch.observer/filing/0001619856-24-000074","json":"https://secwatch.observer/filing/0001619856-24-000074.json","markdown":"https://secwatch.observer/filing/0001619856-24-000074.md","text":"https://secwatch.observer/filing/0001619856-24-000074.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1619856/000161985624000074/0001619856-24-000074-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1619856/000161985624000074/crbu-20240901.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T01:10:33.776229+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"98d86a204b","claim":"Ryan Fischesser was appointed as Interim Principal Financial Officer and Interim Principal Accounting Officer at Caribou Biosciences, Inc..","evidence_excerpt":"On September 23, 2024, Caribou Biosciences, Inc. (the “Company”) designated Ryan Fischesser, the Company’s current Vice President of Finance and Controller, as the Company’s interim principal financial officer and interim principal accounting officer, effective as of 5:00 p.m. Pacific time on September 27, 2024.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1619856/000161985624000074/0001619856-24-000074-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"designated"},{"label":"Role","value":"Interim Principal Financial Officer and Interim Principal Accounting Officer"}],"fact_type":"executive_change"},{"claim_id":"fa1ce93b6e","claim":"Jason O'Byrne resigned as Chief Financial Officer at Caribou Biosciences, Inc..","evidence_excerpt":"Mr. O’Byrne serves as the Company’s principal financial officer and principal accounting officer through September 27, 2024, his final day with the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1619856/000161985624000074/0001619856-24-000074-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}