{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-21-040395","form_type":"8-K","ticker":"CSTL","cik":"0001447362","company_name":"CASTLE BIOSCIENCES INC","filed_at":"2021-12-06T23:59:59+00:00","discovered_at":"2026-05-14T18:04:12.616748+00:00","generated_at":"2026-06-28T03:28:23.421727+00:00","sec_items":["1.01","2.01","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Castle Biosciences completes acquisition of Cernostics for $30M upfront cash, up to $50M earnout","bullets":["Acquisition closed December 3, 2021; upfront cash consideration approximately $30 million.","Up to $50 million additional earnout payable in cash or stock upon achieving 2022 commercial milestones.","Merger agreement amended to cap stock issuance at 19.9% of outstanding shares for Nasdaq compliance.","Cernostics becomes wholly owned subsidiary; post-closing adjustments and escrow apply.","Financial statements of acquired business to be filed by amendment within 71 calendar days."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-21-040395","json":"https://secwatch.observer/filing/0001140361-21-040395.json","markdown":"https://secwatch.observer/filing/0001140361-21-040395.md","text":"https://secwatch.observer/filing/0001140361-21-040395.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1447362/000114036121040395/0001140361-21-040395-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1447362/000114036121040395/brhc10031497_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T03:28:23.421727+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}