Leidos — Aug 5, 2025 release

Financing activities were driven by $61 million returned to shareholders, including $9 million in share repurchases and $52 million as part of a regular quarterly cash dividend program. As of July 4, 2025, Leidos had $930 million in cash and cash equivalents and $5.1 billion of debt. On August 1, 2025, the Leidos Board of Directors declared a cash dividend of $0.40 per share. The dividend will be payable on September 30, 2025, to stockholders of record at the close of business on September 15, 2025. Leidos Holdings, Inc. Exhibit 99.1 2 NEW BUSINESS AWARDS Net bookings totaled $3.9 billion in the quarter, representing a book-to-bill ratio of 0.9. As a result, backlog at the end of the quarter was $46.2 billion, of which $7.1 billion was funded. Included in the quarterly bookings were several notable awards: u Significant Classified Awards. Leidos was awarded two large Intelligence Community contracts: a ten-year, $1.3 billion take-away and a six-year, $390 million recompete. These awards demonstrate Leidos' capability and commitment in supporting the most critical missions to protect the nation. u Air Force Electronic Warfare Mission Support. Leidos was awarded a new $350 million indefinite delivery indefinite quantity (IDIQ) subcontract by Huntington Ingalls Industries (HII) to provide electronic warfare engineering and hardware solutions supporting HII and the U.S. Air Force. The IDIQ will support Electronic Warfare-related Task Orders through September 2029, with the first Task Order awarded in May 2025 valued at $186 million where Leidos will deliv