John D. Vollaro's Ownership Changes in Arch Capital Group Ltd.

On August 5, 2025, John D. Vollaro, a director of Arch Capital Group Ltd., reported changes in his ownership of the company's common shares. Vollaro disposed of 172,155 shares held by a revocable trust for which he serves as trustee and 22,844 shares held by a revocable trust for which his spouse serves as trustee. Additionally, he acquired 194,999 shares held by a revocable trust for which both he and his spouse serve as trustees. Following these transactions, Vollaro holds 163,000 shares in an irrevocable trust where his spouse is a co-trustee and 53,000 shares in an irrevocable trust where he is a co-trustee. The transactions were reported under Form 4, indicating changes in beneficial ownership.