{"schema_version":"secwatch.filing_event.v1","accession":"0001057352-26-000024","form_type":"8-K","ticker":"CSGP","cik":"0001057352","company_name":"COSTAR GROUP, INC.","filed_at":"2026-03-16T23:59:59+00:00","discovered_at":"2026-05-14T18:02:34.478799+00:00","generated_at":"2026-05-15T11:21:51.973397+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"high","headline":"CoStar Group appoints Nana Banerjee to board; brings AI and analytics expertise","bullets":["Nana Banerjee appointed independent director effective March 15, 2026; board expands to nine directors, eight independent.","Banerjee formerly CEO of Pelmorex Corp (The Weather Network), with deep AI and advanced analytics experience.","He also served as Senior Managing Director at Cerberus Capital Management and CEO of McGraw-Hill.","No committee assignments have been made at this time; compensation follows standard director program."],"urls":{"canonical":"https://secwatch.observer/filing/0001057352-26-000024","json":"https://secwatch.observer/filing/0001057352-26-000024.json","markdown":"https://secwatch.observer/filing/0001057352-26-000024.md","text":"https://secwatch.observer/filing/0001057352-26-000024.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1057352/000105735226000024/0001057352-26-000024-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1057352/000105735226000024/csgp-20260315.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T11:21:51.973397+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"}