| 1 | BROOKHAVEN SCIENCE ASSOCIATES LLC | $8,543,630,472 | 1 | $8,543,630,472 | Jan 05, 2015 | Department of Energy |
| 2 | AEROJET ROCKETDYNE OF DE, INC | $3,272,481,574 | 1 | $3,272,481,574 | Nov 01, 2015 | National Aeronautics and … |
| 3 | SCIENCE APPLICATIONS INTERNATIONAL CORPORAT… | $1,672,425,226 | 2 | $836,212,613 | May 16, 2022 | General Services Administ… |
| 4 | NORTHROP GRUMMAN SYSTEMS CORPORATION | $1,594,955,955 | 1 | $1,594,955,955 | Sep 03, 2015 | National Aeronautics and … |
| 5 | KBR WYLE SERVICES, LLC | $1,055,535,162 | 1 | $1,055,535,162 | Jan 02, 2018 | National Aeronautics and … |
| 6 | CALIFORNIA INSTITUTE OF TECHNOLOGY | $772,548,320 | 1 | $772,548,320 | Oct 01, 2012 | National Aeronautics and … |
| 7 | MANTECH ADVANCED SYSTEMS INTERNATIONAL, INC. | $452,112,036 | 1 | $452,112,036 | Jan 31, 2020 | General Services Administ… |
| 8 | AEROJET ROCKETDYNE, INC. | $286,584,371 | 1 | $286,584,371 | Apr 01, 2016 | National Aeronautics and … |
| 9 | AXIENT LLC | $267,578,582 | 2 | $133,789,291 | Mar 29, 2021 | General Services Administ… |
| 10 | SCIENCE SYSTEMS AND APPLICATIONS, INC. | $257,186,996 | 1 | $257,186,996 | Mar 01, 2017 | National Aeronautics and … |
| 11 | BOOZ ALLEN HAMILTON INC | $217,990,347 | 2 | $108,995,174 | Jan 11, 2022 | General Services Administ… |
| 12 | TELEDYNE BROWN ENGINEERING, INC. | $206,904,524 | 1 | $206,904,524 | Feb 01, 2014 | National Aeronautics and … |
