Leidos Holdings, Inc.

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

Our management, with the participation of our principal executive officer (our Chief Executive Officer) and principal financial officer (our Executive Vice President and Chief Financial Officer), has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of July 3, 2026. Based upon that evaluation, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures are effective to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the U.S. Securities and Exchange Commission. These disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934, as amended, is accumulated and communicated to our management, including our principal executive officer and our principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

On March 27, 2026, we completed the acquisition of Entrust and are in the process of integrating the company into our system of internal control over financial reporting.

Other than the Entrust integration, there have been no changes in our internal control over financial reporting during the quarter ended July 3, 2026, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Part II—Other Information