---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-26-000094"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2026-06-03T12:47:07+00:00"
generated_at: "2026-06-03T12:50:12.794896+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Arch Capital expands Maamoun Rajeh's role to sole President; David Gansberg departs

## Summary
- David Gansberg steps down as President immediately and is departing the Company.
- Maamoun Rajeh adds oversight of Insurance segment to existing Reinsurance and Mortgage responsibilities.
- Rajeh, already President since November 2024, continues to report to CEO Nicolas Papadopoulo.
- No new equity awards granted to Rajeh in connection with expanded role; employment terms unchanged.
- Rajeh joined Arch in 2001 and previously served as CEO of Arch's Global Reinsurance Group.

## SEC filing metadata
- accession: 0000947484-26-000094
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2026-06-03T12:47:07+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/0000947484-26-000094-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/acgl-20260603.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-26-000094
- JSON: https://secwatch.observer/filing/0000947484-26-000094.json
- Plain text: https://secwatch.observer/filing/0000947484-26-000094.txt

## Key facts
- Executive change
  David Gansberg departed as President at ARCH CAPITAL GROUP LTD..
  - Action: stepping down
  - Role: President
  source text: David Gansberg is stepping down from his role as a President of Arch effective immediately and will be departing the Company following a distinguished tenure
  evidence_url: https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/0000947484-26-000094-index.htm
- Executive change
  Maamoun Rajeh changed role as President at ARCH CAPITAL GROUP LTD..
  - Action: expansion of role
  - Role: President
  source text: the expansion of Maamoun Rajeh's role as President. Mr. Rajeh, who currently oversees Arch's Reinsurance and Mortgage segments, will also take on responsibility for Arch's Insurance segment
  evidence_url: https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/0000947484-26-000094-index.htm

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