{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-25-010113","form_type":"8-K","ticker":"SPG","cik":"0001063761","company_name":"SIMON PROPERTY GROUP INC.","filed_at":"2025-02-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:02.843285+00:00","generated_at":"2026-05-27T01:21:22.488901+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Simon Property Group co-founder Herbert Simon retires from Board, effective Feb 4, 2025","bullets":["Herbert Simon, age 90, retired as Chairman Emeritus and Board member on Feb 4, 2025.","Simon co-founded the company 65 years ago; retirement is not due to any disagreement.","David Simon, CEO, thanked Herb for his unique knowledge and experience on behalf of 3,600+ employees.","Herbert expressed confidence in David's leadership and SPG's continued growth."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-25-010113","json":"https://secwatch.observer/filing/0001104659-25-010113.json","markdown":"https://secwatch.observer/filing/0001104659-25-010113.md","text":"https://secwatch.observer/filing/0001104659-25-010113.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1063761/000110465925010113/0001104659-25-010113-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1063761/000110465925010113/tm255731d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-27T01:21:22.488901+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":"662dc136d3","claim":"Herbert Simon retired as Chairman Emeritus at SIMON PROPERTY GROUP INC..","evidence_excerpt":"On February 4, 2025, Herbert Simon, age 90, a member and Chaiman Emeritus of the Board of Directors (the “Board”) of Simon Property Group, Inc. (the “Company”) notified the Company that he is retiring from the Board, including his position as Chairman Emeritus, effective as of such date.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1063761/000110465925010113/0001104659-25-010113-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retired"},{"label":"Role","value":"Chairman Emeritus"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}