Form 4 Filing for Robert Alan Rusbuldt

This filing details a transaction by Robert Alan Rusbuldt, a director at W. R. Berkley Corporation (WRB). On June 3, 2026, Mr. Rusbuldt acquired 3,090 shares of Common Stock through an award granted under the W. R. Berkley Corporation 2009 Directors Stock Plan, as amended and restated. This award was granted at a price of $0.0 per share. Following this transaction, Mr. Rusbuldt now directly owns 5,866 shares of WRB common stock. The filing was signed by Robert A. Rusbuldt on June 4, 2026.