ARCH CAPITAL GROUP LTD. (ACGL) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-05 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ARCH CAPITAL GROUP LTD. (ACGL) CIK: 0000947484 --- Reporting Owner --- Name: KILCOYNE MOIRA A. CIK: 0001743252 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Shares, $.0011 par value per share Date: 2026-05-05 | Code: A (Grant or award) Shares: +2,071 Shares Owned After: 34,515 | Ownership: D (Direct) Footnotes: [F1] Subject to the terms of the restricted share agreement, represents restricted shares that will become vested on the date that is the earlier of 1) one year following the grant date or 2) Arch Capital Group Ltd.'s next Annual General Meeting of Shareholders. [Transaction #2] Security: Common Shares, $.0011 par value per share Date: 2026-05-05 | Code: A (Grant or award) Shares: +1,327 Shares Owned After: 35,842 | Ownership: D (Direct) Footnotes: [F2] Represents shares granted as part of the director-elected annual retainer for serving as a director of the Issuer. --- Footnotes (Complete Index) --- F1: Subject to the terms of the restricted share agreement, represents restricted shares that will become vested on the date that is the earlier of 1) one year following the grant date or 2) Arch Capital Group Ltd.'s next Annual General Meeting of Shareholders. F2: Represents shares granted as part of the director-elected annual retainer for serving as a director of the Issuer. --- Signature --- /s/ /s/ Moira A. Kilcoyne (2026-05-07)