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: 2026-05-11 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ARCH CAPITAL GROUP LTD. (ACGL) CIK: 0000947484 --- Reporting Owner --- Name: Posner Brian S CIK: 0001372455 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Depositary Shares, Series G Date: 2026-05-11 | Code: S (Open market sale) Shares: -2,000 | Price: $17.14 Total Value: $34,283.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Each Depositary Share Represents 1/1,000th interest in a Series G Non-Cumulative Preferred Share. [F2] The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $17.14 to $17.17. Upon request, the full information regarding the number of shares sold at each separate price within the range will be provided to the issuer, any security holder of the issuer or the staff of the Securities Exchange Commission. --- Footnotes (Complete Index) --- F1: Each Depositary Share Represents 1/1,000th interest in a Series G Non-Cumulative Preferred Share. F2: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $17.14 to $17.17. Upon request, the full information regarding the number of shares sold at each separate price within the range will be provided to the issuer, any security holder of the issuer or the staff of the Securities Exchange Commission. --- Signature --- /s/ /s/ Brian S. Posner (2026-05-12)