UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 3, 2026

BWX TECHNOLOGIES, INC.

(Exact name of registrant as specified in its charter)

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Registrant’s telephone number, including area code: (980) 365-4300

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Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ¨

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.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.