{"schema_version":"secwatch.filing_event.v1","accession":"0001447362-25-000099","form_type":"8-K","ticker":"CSTL","cik":"0001447362","company_name":"CASTLE BIOSCIENCES INC","filed_at":"2025-08-08T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.011723+00:00","generated_at":"2026-05-17T16:17:54.664701+00:00","sec_items":["5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.25,"calibrated_materiality_score":0.25,"confidence":"high","headline":"Castle Biosciences adopts amended bylaws with changes to meeting procedures and governance","bullets":["Board adopted amended and restated bylaws effective August 5, 2025, modifying quorum, advance notice, and proxy rules.","Advance notice window for stockholder proposals widened: meeting delayed >70 days (previously 30) triggers alternative deadline.","Quorum changed from majority of outstanding shares to majority of voting power; default approval threshold now majority of votes cast.","Universal proxy rules under Rule 14a-19 incorporated; stockholder nominees limited to number of directors to be elected.","Indemnification obligations expanded to maximum extent allowed by law; mandatory advancement of expenses clarified."],"urls":{"canonical":"https://secwatch.observer/filing/0001447362-25-000099","json":"https://secwatch.observer/filing/0001447362-25-000099.json","markdown":"https://secwatch.observer/filing/0001447362-25-000099.md","text":"https://secwatch.observer/filing/0001447362-25-000099.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1447362/000144736225000099/0001447362-25-000099-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1447362/000144736225000099/cstl-20250805.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T16:17:54.664701+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":"41502e240ebf0a4ecf319b6ed71ebf4a33002d84","claim":"CASTLE BIOSCIENCES INC: Adopted amended and restated bylaws effective August 5, 2025, with multiple changes including stockholder meeting procedures, quorum thresholds, and nomination requirements (effective 2025-08-05).","evidence_excerpt":"On August 5, 2025, the board of directors (the “Board”) of Castle Biosciences, Inc. (the “Company”) adopted amended and restated bylaws of the Company (as amended and restated, the “A&R Bylaws”), effective as of such adoption date.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/1447362/000144736225000099/0001447362-25-000099-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"bylaw amendment"},{"label":"Effective","value":"2025-08-05"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}