Top 100 Contractors in NAICS 541712: Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology), FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	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)	$1,143,790,289	6.9%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since FY2020.
2	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)	$876,186,664	5.3%	Rank history: #3 in FY2022, #2 in FY2023, #3 in FY2024 and #4 in FY2025; up 9 since FY2020.
3	RTX Corporation 18 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Hamilton Sundstrand Space Systems International, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$776,544,260	4.7%	Rank history: #9 in FY2022, #7 in FY2023, #28 in FY2024 and #16 in FY2025; up 4 since FY2020.
4	Jacobs Engineering Group Inc. 7 awardees, including Amentum Technology, Inc., The Keyw Corporation and Sotera Defense Solutions, Inc. Top agencies MDA (DOD Missile Defense Agency) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$729,592,859	4.4%	Rank history: #4 in FY2022, #5 in FY2023, #12 in FY2024 and not on the FY2025 list; up 2 since FY2020.
5	Brookhaven Science Associates LLC Top agencies DOE (Department of Energy)	$667,585,945	4.0%	Rank history: #2 in FY2022, #3 in FY2023, #2 in FY2024 and #2 in FY2025; down 2 since FY2020.
6	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$631,737,214	3.8%	Rank history: #5 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
7	Leidos Holdings, Inc. 12 awardees, including Leidos, Inc., Aranea Solutions Inc. and Dynetics, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$495,767,292	3.0%	Rank history: #10 in FY2022, #12 in FY2023, #17 in FY2024 and #26 in FY2025; up 6 since FY2020.
8	Aerojet Rocketdyne Holdings, Inc. 4 awardees, including Aerojet Rocketdyne of DE, Inc. and Aerojet Rocketdyne, Inc. Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$447,183,579	2.7%	Rank history: #11 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
9	PPD Development L.P. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$409,522,970	2.5%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 33 since FY2020.
10	Parsons Corporation 7 awardees, including Parsons Government Services Inc. and Polaris Alpha Advanced Systems Inc. Top agencies DOT (Department of Transportation) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$376,661,085	2.3%	Rank history: #15 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
11	Kbr, Inc. 8 awardees, including KBR Wyle Services, LLC and Pacific Defense Solutions LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) Navy (Department of the Navy)	$363,565,179	2.2%	Rank history: #16 in FY2022, #19 in FY2023, #38 in FY2024 and not on the FY2025 list; up 1 since FY2020.
12	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$339,206,059	2.1%	Rank history: #12 in FY2022, #8 in FY2023, #7 in FY2024 and #12 in FY2025; down 7 since FY2020.
13	Northrop Grumman Corporation 30 awardees, including Orbital Sciences LLC and Northrop Grumman Systems Corporation Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) USAF (Department of the Air Force)	$322,546,277	2.0%	Rank history: #8 in FY2022, #10 in FY2023, #16 in FY2024 and #8 in FY2025; up 2 since FY2020.
14	Alion Science and Technology Corporation 3 awardees, including HII Mission Technologies Corp Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$286,633,035	1.7%	Rank history: #35 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
15	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$271,735,623	1.6%	Rank history: #6 in FY2022, #4 in FY2023, #4 in FY2024 and #3 in FY2025; up 2 since FY2020.
16	Colsa Corp Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$261,599,345	1.6%	Rank history: #27 in FY2022, #30 in FY2023, #27 in FY2024 and #30 in FY2025; up 2 since FY2020.
17	Oasis Systems, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$256,828,127	1.6%	Rank history: #7 in FY2022, #16 in FY2023, #20 in FY2024 and #15 in FY2025; up 3 since FY2020.
18	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)	$210,853,329	1.3%	Rank history: #17 in FY2022, #15 in FY2023, #93 in FY2024 and not on the FY2025 list; up 3 since FY2020.
19	General Dynamics Corporation 17 awardees, including General Dynamics Global Force, LLC, General Dynamics Information Technology, Inc. and Dynport Vaccine Company LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$195,316,228	1.2%	Rank history: #14 in FY2022, #13 in FY2023, #42 in FY2024 and #17 in FY2025; unchanged since FY2020.
20	Radiance Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) NGA (Department of Defense National Geospatial Intelligence Agency)	$191,839,045	1.2%	Rank history: #19 in FY2022, #20 in FY2023, #23 in FY2024 and #35 in FY2025; up 14 since FY2020.
21	CACI International Inc. 5 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and LGS Innovations LLC Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force)	$178,530,017	1.1%	Rank history: #22 in FY2022, #23 in FY2023, #55 in FY2024 and not on the FY2025 list; down 11 since FY2020.
22	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency) Army (Department of the Army) USAF (Department of the Air Force)	$164,790,730	1.0%	Rank history: #18 in FY2022, #17 in FY2023, #14 in FY2024 and #20 in FY2025; up 5 since FY2020.
23	Aaski Technology Inc. Through Mag DS Corp Top agencies Army (Department of the Army)	$153,172,023	0.9%	Rank history: #13 in FY2022, #14 in FY2023, #51 in FY2024 and not on the FY2025 list; down 1 since FY2020.
24	DMD Group Inc. Through Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$151,275,548	0.9%	Rank history: #20 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
25	Arctic Slope Regional Corporation 4 awardees, including Arctic Slope Technical Services, Inc., AS and D, LLC and Analytical Services, Inc. Top agencies NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$150,144,298	0.9%	Rank history: #21 in FY2022, #34 in FY2023, #31 in FY2024 and #7 in FY2025; up 11 since FY2020.
26	The Boeing Company 21 awardees, including Insitu, Inc., Millennium Space Systems, Inc. and HRL Laboratories, LLC Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$145,789,990	0.9%	Rank history: #40 in FY2022, #40 in FY2023, #44 in FY2024 and not on the FY2025 list; up 7 since FY2020.
27	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DHS (Department of Homeland Security)	$133,943,788	0.8%	Rank history: #24 in FY2022, #18 in FY2023, #13 in FY2024 and #14 in FY2025; up 2 since FY2020.
28	Carnegie-Mellon University 2 awardees Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DARPA (Defense Advanced Research Projects Agency)	$132,036,975	0.8%	Rank history: #26 in FY2022, #24 in FY2023, #15 in FY2024 and #25 in FY2025; unchanged since FY2020.
29	Battelle Memorial Institute 4 awardees Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) HHS (Department of Health and Human Services)	$122,758,252	0.7%	Rank history: #44 in FY2022, #41 in FY2023, #52 in FY2024 and #40 in FY2025; down 6 since FY2020.
30	HX5 LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$122,123,449	0.7%	Rank history: #30 in FY2022, #43 in FY2023, #30 in FY2024 and #38 in FY2025; up 61 since FY2020.
31	Amentum Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$116,507,585	0.7%	Rank history: #37 in FY2022, #53 in FY2023, #47 in FY2024 and not on the FY2025 list; up 154 since FY2020.
32	DCS Corporation 3 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$115,433,402	0.7%	Rank history: #36 in FY2022, #25 in FY2023, #25 in FY2024 and #31 in FY2025; down 1 since FY2020.
33	University of Texas System 8 awardees, including University of Texas At Austin, The Univeristy of Texas M.d. Anderson Cancer Center and The University of Texas Health Science Center At San Antonio Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) NASA (National Aeronautics and Space Administration)	$113,249,904	0.7%	Rank history: #28 in FY2022, #26 in FY2023, #33 in FY2024 and not on the FY2025 list; down 3 since FY2020.
34	Sev1Tech, LLC Top agencies Army (Department of the Army)	$108,313,820	0.7%	Rank history: #34 in FY2022, #28 in FY2023, #35 in FY2024 and #24 in FY2025; up 5 since FY2020.
35	Astrion Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$108,199,451	0.7%	Rank history: #31 in FY2022, #32 in FY2023, #54 in FY2024 and not on the FY2025 list; up 2 since FY2020.
36	Teledyne Technologies Incorporated 2 awardees, including Teledyne Brown Engineering, Inc. and Teledyne Scientific & Imaging, LLC Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) WHS (DOD Washington Headquarters Service)	$95,467,018	0.6%	Rank history: #41 in FY2022, #44 in FY2023, #39 in FY2024 and #34 in FY2025; up 9 since FY2020.
37	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army)	$94,490,081	0.6%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
38	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	0.6%	Rank history: #33 in FY2022, #11 in FY2023, #5 in FY2024 and #6 in FY2025; down 14 since FY2020.
39	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) OSD (Office of the Secretary of Defense)	$91,049,175	0.6%	Rank history: #25 in FY2022, #31 in FY2023, #36 in FY2024 and not on the FY2025 list; up 5 since FY2020.
40	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)	$88,234,456	0.5%	Rank history: #32 in FY2022, #27 in FY2023, #26 in FY2024 and #27 in FY2025; down 15 since FY2020.
41	Lockheed Martin Corporation 22 awardees, including Lockheed Martin Overseas, LLC and Lockheed Martin Aculight Corporation Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$79,764,538	0.5%	Rank history: not on the FY2022 list, #54 in FY2023, not on the FY2024 list and #70 in FY2025; down 25 since FY2020.
42	Perspecta Inc. 6 awardees, including Dhpc Technologies, Inc., Peraton Aerospace & Defense Inc. and Analex Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$77,349,627	0.5%	Rank history: not on the FY2022–FY2025 lists; up 61 since FY2020.
43	Ensco Inc. Top agencies USAF (Department of the Air Force)	$74,184,703	0.4%	Rank history: #48 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; up 24 since FY2020.
44	P E Systems, Inc. Top agencies USAF (Department of the Air Force)	$73,279,743	0.4%	Rank history: #54 in FY2022, #35 in FY2023, #32 in FY2024 and #22 in FY2025; up 7 since FY2020.
45	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) MDA (DOD Missile Defense Agency)	$64,413,026	0.4%	Rank history: #29 in FY2022, #22 in FY2023, #19 in FY2024 and #10 in FY2025; down 4 since FY2020.
46	Sigmatech Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$63,431,266	0.4%	Rank history: #43 in FY2022, #36 in FY2023, #22 in FY2024 and #23 in FY2025; up 3 since FY2020.
47	Integration Innovation Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$60,824,647	0.4%	Rank history: #49 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
48	L3Harris Technologies, Inc. 20 awardees, including L3Harris Technologies Integrated Systems L.P., CAE USA Inc. and L3 Adaptive Methods, Inc. Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$60,649,310	0.4%	Rank history: #78 in FY2022, #96 in FY2023, #6 in FY2024 and #9 in FY2025; down 8 since FY2020.
49	Georgia TECH Research Corp 2 awardees, including Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$60,344,548	0.4%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
50	Adnet Systems Inc. Top agencies NASA (National Aeronautics and Space Administration)	$59,491,244	0.4%	Rank history: #47 in FY2022, #89 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
51	Westat, Inc. Top agencies HHS (Department of Health and Human Services)	$58,700,060	0.4%	Rank history: #39 in FY2022, #58 in FY2023, #48 in FY2024 and not on the FY2025 list; up 7 since FY2020.
52	Alcyon Technical Services (Ats) JV, LLC Top agencies NASA (National Aeronautics and Space Administration)	$58,576,523	0.4%	Rank history: #51 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
53	Sumaria Systems, LLC Top agencies USAF (Department of the Air Force)	$55,995,760	0.3%	Rank history: #42 in FY2022, #37 in FY2023, #34 in FY2024 and #33 in FY2025; up 28 since FY2020.
54	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$52,751,978	0.3%	Rank history: #53 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
55	QED Systems, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$52,278,097	0.3%	Rank history: #45 in FY2022, #29 in FY2023, #29 in FY2024 and #18 in FY2025; up 21 since FY2020.
56	Linquest Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$50,910,235	0.3%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
57	IAP Global Services LLC Through IAP Worldwide Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$50,837,393	0.3%	Rank history: #73 in FY2022, #66 in FY2023, #100 in FY2024 and not on the FY2025 list; unchanged since FY2020.
58	General Atomic Technologies Corporation 4 awardees, including General Atomics Aeronautical Systems, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$50,050,147	0.3%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
59	Parsons Government Services Inc. Top agencies MDA (DOD Missile Defense Agency)	$49,476,347	0.3%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
60	Space Systems/Loral LLC 6 awardees, including Lanteris Space LLC Top agencies NASA (National Aeronautics and Space Administration)	$48,883,671	0.3%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 127 since FY2020.
61	HP Enterprise Services LLC 9 awardees, including Peraton Inc., Dhpc Technologies, Inc. and Analex Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$48,519,383	0.3%	Rank history: #38 in FY2022, #38 in FY2023, #59 in FY2024 and not on the FY2025 list; up 24 since FY2020.
62	Vectrus Systems Corporation Through V2X Systems LLC Top agencies Army (Department of the Army)	$46,510,680	0.3%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
63	MCR LLC Through MCR Federal, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DHS (Department of Homeland Security)	$46,477,568	0.3%	Rank history: #57 in FY2022, #42 in FY2023, #40 in FY2024 and #84 in FY2025; up 25 since FY2020.
64	Aerie Aerospace LLC Top agencies NASA (National Aeronautics and Space Administration)	$45,249,102	0.3%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; up 19 since FY2020.
65	Simulation Technologies, Inc. Top agencies Army (Department of the Army) USSOCOM (United States Special Operations Command)	$44,505,933	0.3%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
66	Altamira Technologies Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DECA (Defense Commissary Agency)	$40,737,952	0.2%	Rank history: #50 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
67	SMS Data Products Group Inc. Top agencies Army (Department of the Army)	$38,159,789	0.2%	Rank history: #56 in FY2022, #45 in FY2023, #46 in FY2024 and #32 in FY2025; down 4 since FY2020.
68	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army)	$37,742,518	0.2%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; up 39 since FY2020.
69	HII Mission Technologies Corp Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$37,300,336	0.2%	Rank history: #68 in FY2022, #79 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
70	Advanced Core Concepts LLC 2 awardees, including Arctos Technology Solutions, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$36,944,005	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Cybex, LLC Top agencies Army (Department of the Army)	$36,327,672	0.2%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 37 since FY2020.
72	Adams Communication & Engineering Technology, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$35,138,131	0.2%	Rank history: #80 in FY2022, #100 in FY2023, #50 in FY2024 and #45 in FY2025; up 84 since FY2020.
73	SNA International LLC Top agencies DHA (Defense Health Agency) WHS (DOD Washington Headquarters Service) DHS (Department of Homeland Security)	$33,734,836	0.2%	Rank history: #85 in FY2022, #73 in FY2023, #89 in FY2024 and not on the FY2025 list; up 26 since FY2020.
74	UES Inc. 2 awardees, including Bluehalo, LLC Top agencies USAF (Department of the Air Force) NGA (Department of Defense National Geospatial Intelligence Agency) WHS (DOD Washington Headquarters Service)	$33,692,757	0.2%	Rank history: #65 in FY2022, #65 in FY2023, #72 in FY2024 and not on the FY2025 list; up 15 since FY2020.
75	Utah State University Through Utah State University Space Dynamics Laboratory Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$33,314,575	0.2%	Rank history: not on the FY2022–FY2025 lists; up 31 since FY2020.
76	Astrix Technology LLC Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) USDA (Department of Agriculture)	$32,047,627	0.2%	Rank history: #62 in FY2022, #56 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
77	Trident Vantage Systems, LLC Top agencies NASA (National Aeronautics and Space Administration)	$31,228,257	0.2%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; up 21 since FY2020.
78	Ball Corp 2 awardees, including BAE Systems Space & Mission Systems Inc. and Ball Aerospace & Technologies Corp. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$29,900,036	0.2%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
79	Quantum Research International Inc. Top agencies Army (Department of the Army)	$29,898,735	0.2%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; up 21 since FY2020.
80	Gemini Technical Solutions JV LLC Top agencies USAF (Department of the Air Force)	$29,897,271	0.2%	Rank history: #61 in FY2022, #47 in FY2023, #69 in FY2024 and not on the FY2025 list; up 12 since FY2020.
81	Whitney Bradley & Brown, Inc. 3 awardees, including Serco Inc. and Brtrc Federal Solutions, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$28,653,765	0.2%	Rank history: not on the FY2022 list, #67 in FY2023, #88 in FY2024 and not on the FY2025 list; down 2 since FY2020.
82	Mantech Tsg-2 Joint Venture Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$26,857,457	0.2%	Rank history: not on the FY2022–FY2025 lists; down 34 since FY2020.
83	ICF International, Inc. 2 awardees, including ICF Incorporated, L.L.C. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$26,785,097	0.2%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
84	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$26,257,036	0.2%	Rank history: #63 in FY2022, #48 in FY2023, #53 in FY2024 and #44 in FY2025; up 12 since FY2020.
85	University of Southern California Top agencies Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$25,880,101	0.2%	Rank history: #93 in FY2022, #61 in FY2023, #90 in FY2024 and not on the FY2025 list; up 9 since FY2020.
86	Universities Space Research Association Top agencies NASA (National Aeronautics and Space Administration)	$24,492,340	0.1%	Rank history: #67 in FY2022, not on the FY2023 list, #80 in FY2024 and not on the FY2025 list; up 1 since FY2020.
87	Management & Engineering Technologies International Inc. Top agencies USDA (Department of Agriculture)	$23,766,744	0.1%	Rank history: #55 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; up 36 since FY2020.
88	Excet, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$23,627,752	0.1%	Rank history: not on the FY2022 list, #93 in FY2023, #83 in FY2024 and #51 in FY2025; up 38 since FY2020.
89	BAE Systems PLC 9 awardees, including BAE Systems Information and Electronic Systems Integration Inc. and BAE Systems National Security Solutions Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$23,242,163	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
90	General Electric Company 3 awardees Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$22,624,334	0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
91	Serco North America (Holdings) Inc 4 awardees, including Whitney Bradley & Brown, Inc., Serco Inc. and Brtrc Federal Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$22,520,885	0.1%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; up 237 since FY2020.
92	Kratos Defense & Security Solutions, Inc. 2 awardees, including Kratos Unmanned Aerial Systems, Inc. and Florida Turbine Technologies, Inc. Top agencies USAF (Department of the Air Force)	$21,857,550	0.1%	Rank history: not on the FY2022–FY2025 lists; up 99 since FY2020.
93	Technology Service Corp 2 awardees, including Praxis, Inc. Top agencies Navy (Department of the Navy)	$21,165,241	0.1%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
94	Quantech Services Inc. Top agencies USAF (Department of the Air Force)	$21,071,572	0.1%	Rank history: #75 in FY2022, #64 in FY2023, #61 in FY2024 and #46 in FY2025; up 10 since FY2020.
95	Made in Space Inc. Through Redwire Space Inc. Top agencies NASA (National Aeronautics and Space Administration)	$21,023,502	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	System Studies & Simulation, Inc. Top agencies Army (Department of the Army)	$20,118,768	0.1%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 36 since FY2020.
97	Anavation, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$19,999,278	0.1%	Rank history: not on the FY2022 list, #63 in FY2023, #62 in FY2024 and #62 in FY2025; up 80 since FY2020.
98	Envistacom, L.l.c Top agencies Army (Department of the Army)	$19,776,813	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
99	Mercury Computer Systems Inc. 4 awardees, including Mercury Defense Systems, Inc., Mercury Systems Inc. and Physical Optics Corporation Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$19,477,505	0.1%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
100	The Children's Hospital Corporation Top agencies HHS (Department of Health and Human Services)	$19,435,614	0.1%	Rank history: not on the FY2022–FY2025 lists; up 342 since FY2020.

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 $16.5 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.

Quick answers