{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-066337","form_type":"8-K","ticker":"JHG","cik":"0001274173","company_name":"JANUS HENDERSON GROUP PLC","filed_at":"2023-05-31T23:59:59+00:00","discovered_at":"2026-05-14T18:03:38.235618+00:00","generated_at":"2026-06-14T10:15:47.688080+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":"Janus Henderson appoints Leslie Seidman as independent director and Audit Committee chair","bullets":["Appointment effective June 1, 2023; Seidman will also chair the Audit Committee and join the Governance and Nominations Committee.","Seidman brings 30+ years of accounting experience, including FASB member/chair, J.P. Morgan VP, and Moody's independent director.","Board expands to 11 directors (10 independent, 45% female) following the appointment.","Seidman qualifies as 'audit committee financial expert' under SEC rules and NYSE independence standards."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-066337","json":"https://secwatch.observer/filing/0001104659-23-066337.json","markdown":"https://secwatch.observer/filing/0001104659-23-066337.md","text":"https://secwatch.observer/filing/0001104659-23-066337.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1274173/000110465923066337/0001104659-23-066337-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1274173/000110465923066337/tm2314313d3_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-14T10:15:47.688080+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":"25003c27e6","claim":"Leslie Seidman was appointed as independent director at JANUS HENDERSON GROUP PLC.","evidence_excerpt":"On May 30, 2023, the Board of Directors (the “Board”) of Janus Henderson Group plc (the “Company”) appointed Leslie Seidman to serve as an independent director on the Board of the Company, such appointment to be effective as of June 1, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1274173/000110465923066337/0001104659-23-066337-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"independent director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}