Arch Capital Group Ltd. filed a Form 8-K on October 29, 2026, reporting that director Moira Kilcoyne resigned from its Board of Directors effective October 26, 2026.

Key Highlights

  • Resignation date: Moira Kilcoyne resigned from the Arch Capital Group Ltd. Board of Directors effective October 26, 2026.
  • No disagreement: According to the filing, her resignation "was not because of a disagreement with Arch on any matter relating to Arch's operations, policies, or practices."
  • Immediate effect: The resignation took effect immediately upon submission, per the filing.
  • Board acknowledgment: The filing states that the Board and management thanked Ms. Kilcoyne for her service, citing her "extensive financial services experience."
  • Signatory: The report was signed by François Morin, Executive Vice President, Chief Financial Officer and Treasurer.

Kilcoyne Departure from Arch Capital's Board of Directors

Arch Capital Group Ltd. (NASDAQ:ACGL), a Bermuda-based holding company, disclosed in a Form 8-K current report that Moira Kilcoyne resigned her seat on the company's Board of Directors on October 26, 2026, with immediate effect. The filing was submitted to the U.S. Securities and Exchange Commission on October 29, 2026, under Item 5.02, which covers departures or appointments of directors and certain officers.

The filing explicitly states that the resignation "was not because of a disagreement with Arch on any matter relating to Arch's operations, policies, or practices." The Board and management, according to the filing, expressed gratitude for Ms. Kilcoyne's contributions, noting that her service was "informed by her extensive financial services experience, which has supported the business through a period of strong financial performance." No replacement director was named in the filing.

Arch Capital has three classes of securities registered on the NASDAQ Stock Market: common shares ($0.0011 par value, symbol ACGL), depositary shares representing a 1/1,000th interest in its 5.45% Series F preferred shares (symbol ACGLO), and depositary shares representing a 1/1,000th interest in its 4.55% Series G preferred shares (symbol ACGLN). The 8-K was executed by CFO François Morin on October 29, 2026.

What Was Disclosed

Arch Capital Group Ltd. reported Moira Kilcoyne's immediate resignation from its Board of Directors on October 26, 2026, stating it did not result from any disagreement with the company on operational, policy, or practice matters. No successor was announced in the filing.