49. Red River
2014 Rank: 178
Top Executive: Rick Bolduc, CEO
Location: Claremont, N.H.
Red River exploded up the SP 500 list this year, rocketing from No. 178 last year to No. 49 in 2015. In 2014, the company was awarded contracts with NASA and the Office of U.S. Courts, a blanket purchasing agreement with the U.S. Department of Commerce, and a five-year enterprise services agreement with Department of Veterans Affairs.