Form 4 Filing for ARCH CAPITAL GROUP LTD.

This filing details a transaction by Brian S. Posner, a director at ARCH CAPITAL GROUP LTD. (ACGL). On June 3, 2026, Mr. Posner disposed of 3,000 shares of Depositary Shares, Series F. The disposal was executed at a weighted average price of $19.66 per share, with individual transactions ranging from $19.57 to $19.80. Following this transaction, Mr. Posner holds no shares of this class. The Depositary Shares represent interests in Series F Non-Cumulative Preferred Shares. This information is based on a Form 4 filing.