X0609 4 2026-05-12 0001486957 BWX Technologies, Inc. BWXT 0001408482 Geveden Rex D false 800 MAIN STREET 4TH FLOOR LYNCHBURG VA 24504 1 1 0 0 President and CEO 1 Common Stock 2026-05-12 4 S 0 3710 203.7809 D 208781 D Common Stock 2026-05-12 4 S 0 3570 204.6477 D 205211 D Common Stock 2026-05-12 4 S 0 1402 205.7828 D 203809 D Common Stock 2026-05-12 4 S 0 1318 207.1300 D 202491 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/11/2025. The price in Column 4 is a weighted average price. The shares were sold at prices ranging from $203.2900 to $204.2700 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 $204.3050 to $205.1600 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 $205.3500 to $206.2500 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. Exhibit 24 - Power of Attorney /s/ Rex D. Geveden, by Alexander D. Cobey, attorney-in-fact 2026-05-12