X0609 4 2026-05-18 0 0001593275 Hamilton Insurance Group, Ltd. HG 0001394399 BROWN DAVID A true C/O HAMILTON INSURANCE GROUP, LTD. WELLESLEY HOUSE NORTH, 90 PITTS BAY ROAD PEMBROKE D0 HM08 BERMUDA 1 0 0 0 0 Class B Common Shares 2026-05-18 4 S 0 37300 32.1623 D 450000 I By Leyton Ltd. Class B Common Shares 110308 D The price reported in Column 4 represents a weighted average price. These Class B common shares were sold in multiple transactions at prices ranging from $32.00 to $32.41, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. An investment holding company held by Thelwall Trust, a family trust established for the benefit of the reporting person and his family. Includes restricted stock units. s/ Gemma Carreiro, Attorney-in-Fact 2026-05-20