BWX Technologies, Inc.

Item 1.01 Entry into a Material Definitive Agreement On November 3, 2026, BWX Technologies, Inc. (the “Company”) entered into a First Amendment to Second Amended and Restated Credit Agreement (the “Amendment”) with the subsidiary guarantors party thereto (for the limited purposes set forth therein), Wells Fargo Bank, National Association, as administrative agent, and the other lenders party thereto (the “Lenders”), which amends the Company’s existing Second Amended and Restated Credit Agreement, dated as of November 10, 2025, with the Lenders (the “Credit Agreement”). The Amendment, among other things, (i) extends the maturity of the $1.25 billion senior secured revolving credit facility pursuant to the Credit Agreement by one year to November 10, 2031, (ii) modifies the minimum interest coverage ratio such that it no longer applies if no default or event of default exists and the Company obtains investment grade corporate or corporate family ratings (stable outlook or better) from at least two designated rating agencies, and (iii) modifies the pricing grid to be based on the lower of the existing pricing grid that is tied to the Company’s leverage ratio and a pricing grid tied to the Company’s corporate or corporate family rating, as applicable, from designated rating agencies. Except as amended by the Amendment, the terms of the Credit Agreement remain in full force and effect. The foregoing description of the Amendment is only a summary, does not purport to be complete and is qualified in its entirety by reference to the full text of the Amendment, which is filed as Exhibit 10.1 hereto, and is incorporated herein by reference.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information set forth under Item 1.01 of this Current Report on Form 8-K is incorporated herein by reference.