KBR board adopts amended bylaws on director-nomination notices and exclusive forum

KBR, INC.

Board amended and restated KBR's bylaws on October 13, 2026, effective immediately upon adoption.
Advance-notice provision clarified: a board vacancy from a director's resignation or departure is not an increase in the number of directors to be elected under Section 9(A)(3).
Exclusive forum clause revised so it does not apply to Securities Act of 1933 claims, for which federal district courts have exclusive jurisdiction.
Remaining changes described as clarifying, conforming and ministerial; full text filed as Exhibit 3.1.
Report signed October 16, 2026 by Sonia Galindo, EVP, General Counsel & Corporate Secretary.

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