{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-036098","form_type":"8-K","ticker":"SPG","cik":"0001063761","company_name":"SIMON PROPERTY GROUP INC.","filed_at":"2023-03-23T23:59:59+00:00","discovered_at":"2026-05-14T18:03:43.744970+00:00","generated_at":"2026-06-17T17:31:41.712586+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Simon Property Group appoints Randall J. Lewis to Board; two independent directors to retire","bullets":["Randall J. Lewis, Managing Partner at Cleveland Avenue LLC, appointed to Board effective March 21, 2023.","Board size increased from 14 to 15 members; Lewis will stand for election at 2023 annual meeting.","J. Albert Smith Jr. (Audit Committee chair) and Karen H. Horn (Governance Committee chair) to retire at May 4, 2023 meeting.","Retirements are not due to any disagreement with the Company's operations or policies.","Lewis is independent under NYSE rules; has no material interest in any reportable transaction."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-036098","json":"https://secwatch.observer/filing/0001104659-23-036098.json","markdown":"https://secwatch.observer/filing/0001104659-23-036098.md","text":"https://secwatch.observer/filing/0001104659-23-036098.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1063761/000110465923036098/0001104659-23-036098-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1063761/000110465923036098/tm2310357d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T17:31:41.712586+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":"133d5a3dd1","claim":"J. Albert Smith Jr. departed as Director at SIMON PROPERTY GROUP INC..","evidence_excerpt":"Board members Karen N. Horn, Ph.D. and J. Albert Smith, Jr. notified the Company that they are retiring from the Board","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1063761/000110465923036098/0001104659-23-036098-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retiring"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"137129c42e","claim":"Karen N. Horn departed as Director at SIMON PROPERTY GROUP INC..","evidence_excerpt":"Board members Karen N. Horn, Ph.D. and J. Albert Smith, Jr. notified the Company that they are retiring from the Board","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1063761/000110465923036098/0001104659-23-036098-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retiring"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"9324e63d3d","claim":"Randall J. Lewis was appointed as Director at SIMON PROPERTY GROUP INC..","evidence_excerpt":"appointed Mr. Randall J. Lewis to the Board, effective as of March 21, 2023","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1063761/000110465923036098/0001104659-23-036098-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}