Top 100 Contractors in NAICS 54171: Research and Development in the Physical, Engineering, and Life Sciences, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Lockheed Martin Corporation 33 awardees Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$3,928,300,591	7.7%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since FY2020.
2	Fluor Corporation Through Fluor Marine Propulsion, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy)	$3,053,730,401	6.0%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 9 since FY2020.
3	California Institute of Technology 2 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$2,299,509,193	4.5%	Rank history: #3 in FY2022, #3 in FY2023, #4 in FY2024 and #3 in FY2025; down 2 since FY2020.
4	Leidos Holdings, Inc. 14 awardees, including Leidos Biomedical Research Inc., Leidos, Inc. and Dynetics, Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) USAF (Department of the Air Force)	$1,870,840,276	3.7%	Rank history: #4 in FY2022, #5 in FY2023, #5 in FY2024 and #7 in FY2025; up 1 since FY2020.
5	The Boeing Company 26 awardees, including HRL Laboratories, LLC and Insitu, Inc. Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$1,724,879,947	3.4%	Rank history: #16 in FY2022, #23 in FY2023, #19 in FY2024 and #27 in FY2025; up 2 since FY2020.
6	Northrop Grumman Corporation 46 awardees, including Northrop Grumman Systems Corporation and Orbital Sciences LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$1,389,520,650	2.7%	Rank history: #5 in FY2022, #4 in FY2023, #3 in FY2024 and #5 in FY2025; up 6 since FY2020.
7	The Mitre Corporation Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) USAF (Department of the Air Force)	$1,305,283,900	2.6%	Rank history: #6 in FY2022, #8 in FY2023, #13 in FY2024 and #13 in FY2025; down 1 since FY2020.
8	RTX Corporation 35 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Blue Canyon Technologies LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$1,212,272,645	2.4%	Rank history: #15 in FY2022, #14 in FY2023, #22 in FY2024 and #21 in FY2025; up 7 since FY2020.
9	Massachusetts Institute of Technology 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$1,157,708,880	2.3%	Rank history: #9 in FY2022, #9 in FY2023, #6 in FY2024 and #8 in FY2025; unchanged since FY2020.
10	The Aerospace Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$1,154,224,143	2.3%	Rank history: #8 in FY2022, #11 in FY2023, #8 in FY2024 and #9 in FY2025; down 2 since FY2020.
11	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) NASA (National Aeronautics and Space Administration)	$1,037,526,475	2.0%	Rank history: #7 in FY2022, #7 in FY2023, #32 in FY2024 and not on the FY2025 list; down 1 since FY2020.
12	Jacobs Engineering Group Inc. 11 awardees, including Amentum Technology, Inc., The Keyw Corporation and Sotera Defense Solutions, Inc. Top agencies NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$996,863,717	2.0%	Rank history: #11 in FY2022, #19 in FY2023, #40 in FY2024 and not on the FY2025 list; up 5 since FY2020.
13	Science Applications International Corporation 5 awardees, including Engility Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$990,568,315	1.9%	Rank history: #10 in FY2022, #12 in FY2023, #12 in FY2024 and #16 in FY2025; up 8 since FY2020.
14	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. and Riverside Engineering LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$724,780,749	1.4%	Rank history: #12 in FY2022, #13 in FY2023, #9 in FY2024 and #10 in FY2025; down 1 since FY2020.
15	Kbr, Inc. 10 awardees, including KBR Wyle Services, LLC and Pacific Defense Solutions LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$696,686,320	1.4%	Rank history: #18 in FY2022, #16 in FY2023, #39 in FY2024 and not on the FY2025 list; up 5 since FY2020.
16	Alion Science and Technology Corporation 4 awardees, including HII Mission Technologies Corp Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$692,989,404	1.4%	Rank history: #61 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
17	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$667,585,945	1.3%	Rank history: #13 in FY2022, #17 in FY2023, #14 in FY2024 and #17 in FY2025; down 3 since FY2020.
18	Alliance for Energy Innovation, LLC Top agencies DOE (Department of Energy) USAID (US Agency for International Development) Navy (Department of the Navy)	$587,241,583	1.2%	Rank history: #17 in FY2022, #10 in FY2023, #10 in FY2024 and #15 in FY2025; up 12 since FY2020.
19	Parsons Corporation 10 awardees, including Parsons Government Services Inc., Space Ground System Solutions, Inc. and Polaris Alpha Advanced Systems Inc. Top agencies MDA (DOD Missile Defense Agency) DOT (Department of Transportation) USAF (Department of the Air Force)	$562,227,342	1.1%	Rank history: #19 in FY2022, #25 in FY2023, #26 in FY2024 and #20 in FY2025; up 5 since FY2020.
20	Aerojet Rocketdyne Holdings, Inc. 5 awardees, including Aerojet Rocketdyne of DE, Inc. and Aerojet Rocketdyne, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$485,941,063	1.0%	Rank history: #28 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
21	Georgia TECH Research Corp 2 awardees, including Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$472,493,214	0.9%	Rank history: #20 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
22	Space Exploration Technologies Corp. Top agencies NASA (National Aeronautics and Space Administration) OSD (Office of the Secretary of Defense) SDA (Space Development Agency)	$442,350,468	0.9%	Rank history: #14 in FY2022, #15 in FY2023, #20 in FY2024 and #38 in FY2025; up 46 since FY2020.
23	PPD Development L.P. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$417,956,626	0.8%	Rank history: not on the FY2022–FY2025 lists; up 49 since FY2020.
24	Emergent Biosolutions Inc. 3 awardees, including Emergent Product Development Gaithersburg Inc. and Emergent Virology, LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$409,176,219	0.8%	Rank history: not on the FY2022 list, #68 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
25	CACI International Inc. 8 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and LGS Innovations LLC Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) DARPA (Defense Advanced Research Projects Agency)	$396,340,789	0.8%	Rank history: #23 in FY2022, #20 in FY2023, #16 in FY2024 and #11 in FY2025; down 3 since FY2020.
26	L3Harris Technologies, Inc. 32 awardees, including L3 Technologies, Inc., L3Harris Technologies Integrated Systems L.P. and Fisica Applied Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$361,068,525	0.7%	Rank history: #29 in FY2022, #35 in FY2023, #17 in FY2024 and #19 in FY2025; up 14 since FY2020.
27	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$305,774,324	0.6%	Rank history: #22 in FY2022, #26 in FY2023, #23 in FY2024 and #25 in FY2025; down 2 since FY2020.
28	Battelle Memorial Institute 8 awardees, including Battelle National Biodefense Institute, LLC, Battelle Savannah River Alliance, LLC and Seebyte Limited Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) HHS (Department of Health and Human Services)	$285,371,648	0.6%	Rank history: #25 in FY2022, #22 in FY2023, #30 in FY2024 and #36 in FY2025; down 1 since FY2020.
29	Colsa Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$280,937,614	0.6%	Rank history: #51 in FY2022, #81 in FY2023, #75 in FY2024 and #85 in FY2025; down 1 since FY2020.
30	General Dynamics Corporation 24 awardees, including General Dynamics Global Force, LLC, General Dynamics Information Technology, Inc. and Applied Physical Sciences Corp Top agencies Army (Department of the Army) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$279,702,965	0.5%	Rank history: #26 in FY2022, #24 in FY2023, #28 in FY2024 and #22 in FY2025; down 4 since FY2020.
31	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$277,256,789	0.5%	Rank history: #35 in FY2022, #40 in FY2023, #25 in FY2024 and #31 in FY2025; up 1 since FY2020.
32	Oasis Systems, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$259,355,627	0.5%	Rank history: #27 in FY2022, #49 in FY2023, #56 in FY2024 and #44 in FY2025; up 4 since FY2020.
33	Blue Origin Federation, LLC Top agencies NASA (National Aeronautics and Space Administration)	$252,615,202	0.5%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
34	Riverside Research Institute 2 awardees, including Applied Research Solutions, Inc. Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$232,547,030	0.5%	Rank history: #34 in FY2022, #38 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
35	Radiance Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$225,933,177	0.4%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
36	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$213,299,238	0.4%	Rank history: #38 in FY2022, #44 in FY2023, #48 in FY2024 and #56 in FY2025; down 1 since FY2020.
37	Applied Research Associates, Inc. 2 awardees, including Neya Systems LLC Top agencies DTRA (Defense Threat Reduction Agency) Army (Department of the Army) USAF (Department of the Air Force)	$212,671,807	0.4%	Rank history: #36 in FY2022, #36 in FY2023, #36 in FY2024 and #40 in FY2025; up 4 since FY2020.
38	General Atomic Technologies Corporation 5 awardees, including General Atomics Aeronautical Systems, Inc. and General Atomics Top agencies Army (Department of the Army) DOE (Department of Energy) DARPA (Defense Advanced Research Projects Agency)	$211,292,225	0.4%	Rank history: #63 in FY2022, #33 in FY2023, #87 in FY2024 and not on the FY2025 list; up 8 since FY2020.
39	Thermo Electron Corporation 8 awardees, including Nalge Nunc International Corporation, Fisher Bioservices Inc. and Life Technologies Corporation Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) Army (Department of the Army)	$210,089,391	0.4%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; up 377 since FY2020.
40	The Pennsylvania State University 2 awardees Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army)	$195,918,739	0.4%	Rank history: #33 in FY2022, #34 in FY2023, #31 in FY2024 and #33 in FY2025; down 2 since FY2020.
41	Linquest Corporation 3 awardees, including The Perduco Group, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$188,912,114	0.4%	Rank history: #42 in FY2022, #37 in FY2023, #35 in FY2024 and #35 in FY2025; down 4 since FY2020.
42	DCS Corporation 3 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$188,165,208	0.4%	Rank history: #46 in FY2022, #48 in FY2023, #57 in FY2024 and #63 in FY2025; up 3 since FY2020.
43	Arctic Slope Regional Corporation 8 awardees, including Arctic Slope Technical Services, Inc., AS and D, LLC and Analytical Services, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$180,194,097	0.4%	Rank history: #39 in FY2022, #70 in FY2023, #49 in FY2024 and #30 in FY2025; up 14 since FY2020.
44	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$171,618,297	0.3%	Rank history: not on the FY2022–FY2023 lists, #34 in FY2024 and #34 in FY2025; new, not ranked in FY2020.
45	Mantech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Mantech SRS Technologies, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$160,783,975	0.3%	Rank history: #32 in FY2022, #43 in FY2023, #55 in FY2024 and not on the FY2025 list; up 24 since FY2020.
46	Aaski Technology Inc. Through Mag DS Corp Top agencies Army (Department of the Army)	$156,882,379	0.3%	Rank history: #30 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
47	Carnegie-Mellon University 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$156,406,056	0.3%	Rank history: #47 in FY2022, #53 in FY2023, #46 in FY2024 and #54 in FY2025; unchanged since FY2020.
48	Perspecta Inc. 8 awardees, including Dhpc Technologies, Inc., Peraton Labs Inc. and Peraton Technology Services Inc. Top agencies Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$155,606,033	0.3%	Rank history: not on the FY2022–FY2025 lists; up 46 since FY2020.
49	DMD Group Inc. Through Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$151,275,548	0.3%	Rank history: #43 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
50	Amentum Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$139,679,432	0.3%	Rank history: #40 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; up 204 since FY2020.
51	Qinetiq Group PLC 3 awardees, including Qinetiq Inc. and Qinetiq Special Projects, Inc. Top agencies Army (Department of the Army) WHS (DOD Washington Headquarters Service) DOI (Department of the Interior)	$138,089,110	0.3%	Rank history: #45 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
52	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DHS (Department of Homeland Security)	$136,172,422	0.3%	Rank history: #50 in FY2022, #50 in FY2023, #47 in FY2024 and #39 in FY2025; up 2 since FY2020.
53	Frontier Technology Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$135,417,977	0.3%	Rank history: #59 in FY2022, #64 in FY2023, #65 in FY2024 and #91 in FY2025; up 33 since FY2020.
54	Assured Information Security, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$134,478,845	0.3%	Rank history: #81 in FY2022, #94 in FY2023, #95 in FY2024 and not on the FY2025 list; down 5 since FY2020.
55	Leidos Biomedical Research Inc. Top agencies HHS (Department of Health and Human Services)	$134,090,254	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$133,469,352	0.3%	Rank history: #74 in FY2022, #60 in FY2023, #76 in FY2024 and #86 in FY2025; up 3 since FY2020.
57	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$132,937,822	0.3%	Rank history: #55 in FY2022, #66 in FY2023, #74 in FY2024 and #79 in FY2025; down 6 since FY2020.
58	Teledyne Technologies Incorporated 5 awardees, including Teledyne Brown Engineering, Inc., Teledyne Scientific & Imaging, LLC and Teledyne Energy Systems, Inc. Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) Army (Department of the Army)	$130,012,274	0.3%	Rank history: #67 in FY2022, #57 in FY2023, #44 in FY2024 and #48 in FY2025; up 3 since FY2020.
59	HX5 LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$129,583,475	0.3%	Rank history: #60 in FY2022, not on the FY2023 list, #83 in FY2024 and #88 in FY2025; up 91 since FY2020.
60	University of Texas System 11 awardees, including University of Texas At Austin, University of Texas Medical Branch At Galveston and The Univeristy of Texas M.d. Anderson Cancer Center Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$129,101,616	0.3%	Rank history: #52 in FY2022, #69 in FY2023, #89 in FY2024 and not on the FY2025 list; down 10 since FY2020.
61	General Electric Company 6 awardees, including GE Aviation Systems LLC and GE Energy Power Conversion Naval Systems Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$127,829,715	0.3%	Rank history: #58 in FY2022, #52 in FY2023, #54 in FY2024 and #57 in FY2025; up 19 since FY2020.
62	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$122,858,339	0.2%	Rank history: #48 in FY2022, #42 in FY2023, #43 in FY2024 and #32 in FY2025; down 6 since FY2020.
63	Siga Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$112,567,056	0.2%	Rank history: not on the FY2022 list, #65 in FY2023, #69 in FY2024 and not on the FY2025 list; up 2 since FY2020.
64	Axient LLC 2 awardees, including Millennium Engineering and Integration Services, LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency)	$109,802,164	0.2%	Rank history: #53 in FY2022, #72 in FY2023, #72 in FY2024 and #75 in FY2025; down 22 since FY2020.
65	Orasure Technologies Inc. Top agencies USAF (Department of the Air Force)	$109,000,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Sev1Tech, LLC Top agencies Army (Department of the Army)	$108,313,820	0.2%	Rank history: #72 in FY2022, #73 in FY2023, not on the FY2024 list and #55 in FY2025; unchanged since FY2020.
67	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army)	$108,248,468	0.2%	Rank history: not on the FY2022 list, #62 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
68	Astrion Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$108,199,451	0.2%	Rank history: #66 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
69	Westat, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) Army (Department of the Army)	$104,744,936	0.2%	Rank history: #73 in FY2022, not on the FY2023 list, #77 in FY2024 and #90 in FY2025; up 12 since FY2020.
70	Utah State University 2 awardees, including Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) NASA (National Aeronautics and Space Administration)	$99,681,655	0.2%	Rank history: #65 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
71	Fibertek, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$98,687,310	0.2%	Rank history: #70 in FY2022, #85 in FY2023, #68 in FY2024 and #99 in FY2025; up 24 since FY2020.
72	BAE Systems PLC 16 awardees, including BAE Systems Information & Electronic Systems Integration Inc., BAE Systems Land & Armaments L.P. and BAE Systems National Security Solutions Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$95,390,346	0.2%	Rank history: #64 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; down 20 since FY2020.
73	Danaher Corporation 4 awardees, including Cepheid, Western Environmental Technology Laboratories, Inc. and Beckman Coulter Inc. Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration)	$94,075,440	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	On Assignment, Inc. 2 awardees, including ECS Federal, LLC Top agencies DISA (Defense Information Systems Agency) OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$92,544,174	0.2%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
75	Ball Corp 2 awardees, including BAE Systems Space & Mission Systems Inc. and Ball Aerospace & Technologies Corp. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$92,280,917	0.2%	Rank history: #93 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
76	Odyssey Systems Consulting Group, Ltd. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$91,082,716	0.2%	Rank history: #71 in FY2022, #39 in FY2023, #29 in FY2024 and #29 in FY2025; down 33 since FY2020.
77	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$90,554,626	0.2%	Rank history: #92 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; down 19 since FY2020.
78	UES Inc. 2 awardees, including Bluehalo, LLC Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) NGA (Department of Defense National Geospatial Intelligence Agency)	$89,708,935	0.2%	Rank history: #80 in FY2022, #93 in FY2023, #84 in FY2024 and not on the FY2025 list; down 7 since FY2020.
79	University of Dayton Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) WHS (DOD Washington Headquarters Service)	$85,503,043	0.2%	Rank history: #78 in FY2022, #75 in FY2023, #59 in FY2024 and #42 in FY2025; down 6 since FY2020.
80	Southwest Research Institute 2 awardees, including Signature Science LLC Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) NASA (National Aeronautics and Space Administration)	$79,074,044	0.2%	Rank history: #82 in FY2022, #71 in FY2023, #67 in FY2024 and #70 in FY2025; up 27 since FY2020.
81	Space Systems/Loral LLC 8 awardees, including Lanteris Space LLC, Maxar Mission Solutions Inc. and Vantor Services Inc. Top agencies NASA (National Aeronautics and Space Administration) NGA (Department of Defense National Geospatial Intelligence Agency) USAF (Department of the Air Force)	$78,771,359	0.2%	Rank history: not on the FY2022–FY2025 lists; up 120 since FY2020.
82	Sigmatech Inc. 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$77,736,106	0.2%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
83	Ensco Inc. Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) DARPA (Defense Advanced Research Projects Agency)	$77,679,004	0.2%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 22 since FY2020.
84	Kratos Defense & Security Solutions, Inc. 8 awardees, including Kratos Unmanned Aerial Systems, Inc., Florida Turbine Technologies, Inc. and Kratos Defense & Rocket Support Services, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$75,596,837	0.1%	Rank history: #68 in FY2022, #84 in FY2023 and not on the FY2024–FY2025 lists; up 148 since FY2020.
85	P E Systems, Inc. Top agencies USAF (Department of the Air Force)	$73,279,743	0.1%	Rank history: not on the FY2022–FY2024 lists and #58 in FY2025; down 1 since FY2020.
86	American Electronic Warfare Associates, Incorporated Top agencies Navy (Department of the Navy)	$70,197,749	0.1%	Rank history: #87 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
87	The Emmes Company, LLC Top agencies HHS (Department of Health and Human Services)	$67,302,742	0.1%	Rank history: #95 in FY2022, #98 in FY2023, #97 in FY2024 and not on the FY2025 list; up 4 since FY2020.
88	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$67,176,643	0.1%	Rank history: not on the FY2022–FY2023 lists, #7 in FY2024 and not on the FY2025 list; up 41 since FY2020.
89	HP Enterprise Services LLC 11 awardees, including Peraton Inc., Peraton Labs Inc. and Dhpc Technologies, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$64,375,704	0.1%	Rank history: #49 in FY2022, #56 in FY2023 and not on the FY2024–FY2025 lists; up 55 since FY2020.
90	Range Generation Next LLC Top agencies Army (Department of the Army)	$63,871,126	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
91	Barrios Technology, LLC Top agencies NASA (National Aeronautics and Space Administration)	$62,657,275	0.1%	Rank history: #90 in FY2022, not on the FY2023 list, #92 in FY2024 and not on the FY2025 list; up 2 since FY2020.
92	Two Six Labs Holdings, Inc. Through Two Six Labs, LLC Top agencies DARPA (Defense Advanced Research Projects Agency) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$62,447,334	0.1%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
93	Integration Innovation Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$61,733,031	0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
94	Adnet Systems Inc. Top agencies NASA (National Aeronautics and Space Administration)	$59,491,244	0.1%	Rank history: not on the FY2022–FY2024 lists and #80 in FY2025; up 22 since FY2020.
95	Technology Service Corp 2 awardees, including Praxis, Inc. Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$59,370,676	0.1%	Rank history: #79 in FY2022, #55 in FY2023, #62 in FY2024 and #61 in FY2025; down 10 since FY2020.
96	Alcyon Technical Services (Ats) JV, LLC Top agencies NASA (National Aeronautics and Space Administration)	$58,576,523	0.1%	Rank history: not on the FY2022–FY2025 lists; up 26 since FY2020.
97	Seakr Engineering, LLC Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$57,245,791	0.1%	Rank history: not on the FY2022–FY2025 lists; up 102 since FY2020.
98	Sumaria Systems, LLC Top agencies USAF (Department of the Air Force)	$55,995,760	0.1%	Rank history: #97 in FY2022, not on the FY2023–FY2024 lists and #87 in FY2025; up 42 since FY2020.
99	Duke University 2 awardees, including Duke University Health System, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DARPA (Defense Advanced Research Projects Agency)	$55,551,662	0.1%	Rank history: #94 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; down 17 since FY2020.
100	Assurance Technology Corp Top agencies Navy (Department of the Navy)	$54,478,011	0.1%	Rank history: #86 in FY2022, #87 in FY2023, #100 in FY2024 and #53 in FY2025; up 18 since FY2020.

Rankings for the codes under NAICS 54171

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $51.1 billion obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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