Reston, Virginia-based Leidos Holdings, Inc. (LDOS) provides services and solutions in the defense, intelligence, engineering, civil, and health markets. With a market cap of $18 billion, the company provides scientific, engineering, systems integration, and technical services and solutions.
Shares of this global science and technology leader have notably underperformed the broader market over the past year. LDOS has declined 20.1% over this time frame, while the broader S&P 500 Index ($SPX) has rallied nearly 19.3%. In 2026, LDOS stock is down 20.8%, compared to the SPX’s 12.4% rise on a YTD basis.