EXHIBIT 99.1 Leidos Posts Strong Third Quarter Results and Raises Full-Year Guidance RESTON, Va., November 4, 2025 – Leidos Holdings, Inc. (NYSE: LDOS) today reported financial results for the third quarter of fiscal year 2025, highlighted by robust earnings and revenue growth. "Leidos continues to deliver exceptional results through the strength of our portfolio of mission-critical work as well as the innovation, agility, and discipline of our talented workforce," said Leidos Chief Executive Officer Tom Be ...