Reston, Virginia-based Leidos Holdings, Inc. (LDOS) is one of the largest government services contractors in the United States. With a market cap of $15.7 billion, it is a defense, aerospace, information technology, and engineering company that provides advanced technology, cybersecurity, intelligence, and scientific solutions primarily to government agencies and commercial customers.
Shares of this global science and technology leader have struggled to keep up with the broader market over the past year. LDOS has plunged 21% over this time frame, while the broader S&P 500 Index ($SPX) has rallied nearly 23.3%. Moreover, in 2026, LDOS stock is down 30.2%, compared to the SPX’s 7.4% YTD rise.