{"schema_version":"secwatch.filing_event.v1","accession":"0001739445-21-000159","form_type":"8-K","ticker":"ACA","cik":"0001739445","company_name":"Arcosa, Inc.","filed_at":"2021-12-10T23:59:59+00:00","discovered_at":"2026-05-14T18:04:13.898939+00:00","generated_at":"2026-06-28T02:07:59.628578+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Arcosa elects Julie Piggott, former BNSF CFO, as independent director; board expands to 10","bullets":["Julie Piggott elected independent director effective Dec 9, 2021; serves on Audit Committee.","Piggott was EVP and CFO of BNSF Railway (2014–2021) with over 30 years of finance experience.","Board expanded from 9 to 10 members with her election.","Awarded 984 RSUs (pro-rata 2021 non-employee director grant) vesting in one year.","Independence affirmed under NYSE and SEC rules; no related-party transactions reported."],"urls":{"canonical":"https://secwatch.observer/filing/0001739445-21-000159","json":"https://secwatch.observer/filing/0001739445-21-000159.json","markdown":"https://secwatch.observer/filing/0001739445-21-000159.md","text":"https://secwatch.observer/filing/0001739445-21-000159.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1739445/000173944521000159/0001739445-21-000159-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1739445/000173944521000159/aca-20211209.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T02:07:59.628578+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":"b5e01b9756","claim":"Julie Piggott was elected as member of the Board at Arcosa, Inc..","evidence_excerpt":"On December 9, 2021, the Board of Directors (the “Board”) of Arcosa, Inc. (the \"Company\") elected Julie Piggott as a member of the Board, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1739445/000173944521000159/0001739445-21-000159-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"label":"Role","value":"member of the Board"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}