KBR, INC.

We entered into Amendment No. 14 to our Credit Agreement on July 29, 2026 (the "Amendment"). The Amendment modified the Credit Agreement to, among other things, permit internal reorganization transactions necessary or desirable to prepare for our previously announced spin-off of the Mission Technology Solutions business and effect additional modifications to the terms and provisions of the Credit Agreement, as further set forth in the Amendment. The foregoing description of the Amendment 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 10.3 to this Quarterly Report on Form 10-Q hereto and incorporated herein by reference.

During the three months ended July 3, 2026, none of our officers or directors adopted orterminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act or any “non-Rule 10b5-1 trading arrangement” as defined in Item 408(c) of SEC Regulation S-K.