---
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"
generated_at: "2026-06-14T10:15:47.688080+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Janus Henderson appoints Leslie Seidman as independent director and Audit Committee chair

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-066337
- JSON: https://secwatch.observer/filing/0001104659-23-066337.json
- Plain text: https://secwatch.observer/filing/0001104659-23-066337.txt

## Key facts
- Executive change
  Leslie Seidman was appointed as independent director at JANUS HENDERSON GROUP PLC.
  - Action: appointed
  - Role: independent director
  source text: 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_url: https://www.sec.gov/Archives/edgar/data/1274173/000110465923066337/0001104659-23-066337-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.