---
schema_version: "secwatch.filing_event.v1"
accession: "0000947484-24-000123"
form_type: "8-K"
ticker: "ACGL"
cik: "0000947484"
company_name: "ARCH CAPITAL GROUP LTD."
filed_at: "2024-10-15T23:59:59+00:00"
generated_at: "2026-05-30T15:09:25.843464+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Arch Capital CEO Marc Grandisson retires; Nicolas Papadopoulo named CEO

## Summary
- Marc Grandisson retired as CEO and director effective Oct 15, 2024, after serving since 2018.
- Nicolas Papadopoulo appointed CEO and board member effective Oct 13, 2024.
- Papadopoulo was President and Chief Underwriting Officer since 2021; joined Arch in 2001.
- New CEO compensation: base salary $1.3M, target annual bonus 200% of base salary.
- Transition part of a Board-led succession plan; no departure cloud or disclosed dissent.

## SEC filing metadata
- accession: 0000947484-24-000123
- form_type: 8-K
- ticker: ACGL
- cik: 0000947484
- company_name: ARCH CAPITAL GROUP LTD.
- filed_at: 2024-10-15T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/947484/000094748424000123/0000947484-24-000123-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/947484/000094748424000123/acgl-20241011.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000947484-24-000123
- JSON: https://secwatch.observer/filing/0000947484-24-000123.json
- Plain text: https://secwatch.observer/filing/0000947484-24-000123.txt

## Key facts
- Executive change
  Marc Grandisson retired as Chief Executive Officer at ARCH CAPITAL GROUP LTD..
  - Action: retired
  - Role: Chief Executive Officer
  source text: On October 11, 2024, Marc Grandisson, Chief Executive Officer of Arch Capital Group Ltd. (the “Company”), notified the board of directors (the “Board”) of the Company of his decision to retire from his employment with the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/947484/000094748424000123/0000947484-24-000123-index.htm
- Executive change
  Nicolas Papadopoulo was appointed as Chief Executive Officer at ARCH CAPITAL GROUP LTD..
  - Action: appointed
  - Role: Chief Executive Officer
  source text: the Board approved the appointment of Nicolas Papadopoulo as Chief Executive Officer of the Company and as a member of the Board, effective October 13, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/947484/000094748424000123/0000947484-24-000123-index.htm

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