Leidos — Nov 4, 2025 release

Exhibit 99.1 shareholders of $153 million, including $102 million in share repurchases and $51 million as part of a regular quarterly cash dividend program. As of October 3, 2025, Leidos had $974 million in cash and cash equivalents and $4.7 billion of debt. On October 31, 2025, the Leidos Board of Directors declared a cash dividend of $0.43 per share, which represents an increase of 7.5% over the prior quarter's dividend amount. The dividend will be payable on December 31, 2025, to stockholders of record at the close of business on December 15, 2025. Leidos Holdings, Inc. Exhibit 99.1 2 NEW BUSINESS AWARDS Net bookings totaled $5.9 billion in the quarter, representing a book-to-bill ratio of 1.3. As a result, backlog at the end of the quarter was $47.7 billion, of which $9.1 billion was funded. Total backlog was up 5% year-over-year, and funded backlog was up 27% sequentially. Included in the quarterly bookings were several notable awards: u Classified Mission Support. Leidos was awarded a $2.2 billion, seven-year contract in the intelligence community. This take-away award demonstrates Leidos' capability and commitment in supporting the most critical missions to protect the nation. u National Aeronautics and Space Administration (NASA) Human Health and Performance Contract. Leidos received a $760 million single award indefinite delivery indefinite quantity (IDIQ) subcontract to provide critical astronaut health and performance services and research support to enable NASA to prepare for the next era of human space exploration.