X0508 4 2025-08-06 0001486957 BWX Technologies, Inc. BWXT 0001408482 Geveden Rex D 800 MAIN STREET 4TH FLOOR LYNCHBURG VA 24504 1 1 0 0 President and CEO 0 Common Stock 2025-08-06 4 S 0 24468 178.9890 D 198126 D Common Stock 2025-08-06 4 S 0 532 179.6898 D 197594 D The price in Column 4 is a weighted average price. The shares were sold at prices ranging from $178.5450 to $179.5400 inclusive. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price will be provided. The price in Column 4 is a weighted average price. The shares were sold at prices ranging from $179.5500 to $179.7500 inclusive. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price will be provided. /s/ Rex D. Geveden, by Theresa B. Taylor, attorney-in-fact 2025-08-08