{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-286182","form_type":"8-K","ticker":"OGS","cik":"0001587732","company_name":"ONE Gas, Inc.","filed_at":"2025-11-18T23:59:59+00:00","discovered_at":"2026-05-14T18:02:39.834333+00:00","generated_at":"2026-05-16T18:46:59.797589+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"ONE Gas board chair John Gibson to retire May 2026; Deborah Hersman elected successor","bullets":["John W. Gibson (73) retiring as Board chair after 11 years, effective May 21, 2026.","Deborah A.P. Hersman (55) elected to succeed as chair, effective same date.","Hersman joined board in 2023; former NTSB chair, National Safety Council CEO, Waymo CSO.","Retirement not due to disagreement; board size to reduce to eight after departure.","Gibson led ONE Gas separation from ONEOK in 2014; succession was comprehensive planning process."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-286182","json":"https://secwatch.observer/filing/0001193125-25-286182.json","markdown":"https://secwatch.observer/filing/0001193125-25-286182.md","text":"https://secwatch.observer/filing/0001193125-25-286182.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1587732/000119312525286182/0001193125-25-286182-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1587732/000119312525286182/d886620d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T18:46:59.797589+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"}