{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-23-021828","form_type":"8-K","ticker":"TECX","cik":"0001681087","company_name":"Tectonic Therapeutic, Inc.","filed_at":"2023-05-01T23:59:59+00:00","discovered_at":"2026-05-14T18:03:40.018794+00:00","generated_at":"2026-06-16T05:08:05.136015+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"AVROBIO CEO Geoff MacKay resigns; CFO Erik Ostrowski named interim CEO","bullets":["CEO Geoff MacKay resigns effective May 1, 2023, to join an early-stage company; no disagreement with the company.","CFO Erik Ostrowski appointed President and Interim CEO, effective May 1, 2023; will continue as CFO.","Board of Directors begins search for a permanent CEO; Ostrowski has over 20 years of biotech finance experience.","MacKay served as founding CEO for eight years; company transitioning to late-stage development for Gaucher and cystinosis programs."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-23-021828","json":"https://secwatch.observer/filing/0001140361-23-021828.json","markdown":"https://secwatch.observer/filing/0001140361-23-021828.md","text":"https://secwatch.observer/filing/0001140361-23-021828.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1681087/000114036123021828/0001140361-23-021828-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1681087/000114036123021828/ny20008949x1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T05:08:05.136015+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":"8b1ba913ce","claim":"Erik Ostrowski was appointed as President and Interim Chief Executive Officer at Tectonic Therapeutic, Inc..","evidence_excerpt":"On April 28, 2023, the Board appointed Erik Ostrowski, the Company’s current Chief Financial Officer and Treasurer, as the Company’s President and Interim Chief Executive Officer, effective at 1:00 p.m. ET on May 1, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1681087/000114036123021828/0001140361-23-021828-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"President and Interim Chief Executive Officer"}],"fact_type":"executive_change"},{"claim_id":"e922ef0dda","claim":"Geoff MacKay resigned as President and Chief Executive Officer at Tectonic Therapeutic, Inc..","evidence_excerpt":"On April 28, 2023, Geoff MacKay provided notice of his resignation as President and Chief Executive Officer and a member of the Board of Directors (the “ Board ”) of AVROBIO, Inc. (the “ Company ”), effective at 1:00 p.m. ET on May 1, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1681087/000114036123021828/0001140361-23-021828-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"President and Chief Executive Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}