Top 100 Contractors in PSC A: Research and Development, FY2021

Name: Top 100 Contractors in PSC A: Research and Development, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 44% of FY2021 PSC A contract dollars

Contract obligations: $56,472,844,882 Net of deobligations, by contracts coded PSC A or a code under it
Contractors: 5,394 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $7.62 billion, 12.9% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Lockheed Martin Corporation 42 awardees, including Sikorsky Aircraft Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$7,618,716,664	12.9%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Northrop Grumman Corporation 62 awardees, including Northrop Grumman Systems Corp, Orbital Sciences LLC and ATK Launch Systems LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency)	$3,557,030,172	6.0%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 2 since FY2020.
3	Lawrence Livermore National Security, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$2,755,443,934	4.7%	Rank history: #3 in FY2022, #5 in FY2023, #5 in FY2024 and #3 in FY2025; unchanged since FY2020.
4	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)	$2,302,131,480	3.9%	Rank history: #4 in FY2022, #6 in FY2023, #7 in FY2024 and #7 in FY2025; down 2 since FY2020.
5	The Boeing Company 34 awardees, including HRL Laboratories, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,231,296,292	3.8%	Rank history: #5 in FY2022, #7 in FY2023, #4 in FY2024 and #6 in FY2025; unchanged since FY2020.
6	RTX Corporation 51 awardees, including Raytheon Company, Rockwell Collins, Inc. and RTX BBN Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$2,181,197,315	3.7%	Rank history: #6 in FY2022, #4 in FY2023, #6 in FY2024 and #5 in FY2025; up 5 since FY2020.
7	The Mitre Corporation 2 awardees Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) HHS (Department of Health and Human Services)	$1,455,626,600	2.5%	Rank history: #7 in FY2022, #9 in FY2023, #13 in FY2024 and #14 in FY2025; down 1 since FY2020.
8	Leidos Holdings, Inc. 19 awardees, including Leidos Biomedical Research Inc., Leidos, Inc. and Dynetics, Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) Army (Department of the Army)	$1,301,275,986	2.2%	Rank history: #10 in FY2022, #10 in FY2023, #11 in FY2024 and #11 in FY2025; unchanged since FY2020.
9	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) MDA (DOD Missile Defense Agency)	$1,224,613,775	2.1%	Rank history: #8 in FY2022, #8 in FY2023, #33 in FY2024 and not on the FY2025 list; unchanged since FY2020.
10	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)	$1,176,146,497	2.0%	Rank history: #9 in FY2022, #11 in FY2023, #9 in FY2024 and #9 in FY2025; unchanged since FY2020.
11	Jacobs Engineering Group Inc. 12 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) DISA (Defense Information Systems Agency)	$819,143,440	1.4%	Rank history: #15 in FY2022, #25 in FY2023, #49 in FY2024 and not on the FY2025 list; up 8 since FY2020.
12	Science Applications International Corporation 6 awardees, including Engility Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$746,637,890	1.3%	Rank history: #13 in FY2022, #14 in FY2023, #16 in FY2024 and #19 in FY2025; up 14 since FY2020.
13	BAE Systems PLC 20 awardees, including BAE Systems Land and Armaments L.P., BAE Systems Information and Electronic Systems Integration Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$725,488,432	1.2%	Rank history: #19 in FY2022, #20 in FY2023, #20 in FY2024 and #16 in FY2025; up 1 since FY2020.
14	Booz Allen Hamilton Holding Corporation 6 awardees, including Booz Allen Hamilton Inc., Booz Allen Hamilton Engineering Services, LLC and Riverside Engineering LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$693,031,401	1.2%	Rank history: #12 in FY2022, #15 in FY2023, #12 in FY2024 and #12 in FY2025; up 1 since FY2020.
15	Analytic Services Inc. Through Advanced Technology International Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$624,620,661	1.1%	Rank history: #14 in FY2022, #3 in FY2023, #8 in FY2024 and not on the FY2025 list; up 6 since FY2020.
16	Kbr, Inc. 11 awardees, including KBR Wyle Services, LLC and Pacific Defense Solutions LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$587,790,732	1.0%	Rank history: #17 in FY2022, #16 in FY2023, #44 in FY2024 and not on the FY2025 list; up 6 since FY2020.
17	Space Exploration Technologies Corp. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$531,989,197	0.9%	Rank history: #11 in FY2022, #12 in FY2023, #18 in FY2024 and #25 in FY2025; up 35 since FY2020.
18	Alion Science and Technology Corporation 5 awardees, including HII Mission Technologies Corp Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$505,034,080	0.9%	Rank history: not on the FY2022 list, #21 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
19	General Dynamics Corporation 32 awardees, including General Dynamics Mission Systems, Inc., General Dynamics Land Systems Inc. and General Dynamics Information Technology, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$486,417,163	0.8%	Rank history: #25 in FY2022, #26 in FY2023, #25 in FY2024 and #20 in FY2025; up 1 since FY2020.
20	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)	$477,975,800	0.8%	Rank history: #18 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
21	Modernatx Inc. Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$443,528,706	0.8%	Rank history: #28 in FY2022 and not on the FY2023–FY2025 lists; down 9 since FY2020.
22	L3Harris Technologies, Inc. 43 awardees, including L3 Technologies, Inc., Fisica Applied Technologies, Inc. and L3Harris Technologies Integrated Systems L.P. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$421,509,907	0.7%	Rank history: #16 in FY2022, #24 in FY2023, #17 in FY2024 and #15 in FY2025; up 6 since FY2020.
23	PPD Development L.P. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$417,956,626	0.7%	Rank history: not on the FY2022–FY2025 lists; up 60 since FY2020.
24	Emergent Biosolutions Inc. 6 awardees, including Emergent Product Development Gaithersburg Inc., Emergent Biosolutions Canada Inc. and Emergent Virology, LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$411,172,090	0.7%	Rank history: not on the FY2022 list, #66 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
25	Parsons Corporation 12 awardees, including Parsons Government Services Inc., Space Ground System Solutions, Inc. and Polaris Alpha Advanced Systems Inc. Top agencies DOT (Department of Transportation) USAF (Department of the Air Force) Navy (Department of the Navy)	$356,833,520	0.6%	Rank history: #22 in FY2022, #41 in FY2023, #70 in FY2024 and #48 in FY2025; up 2 since FY2020.
26	National Security Technology Accelerator Inc. Top agencies WHS (DOD Washington Headquarters Service) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$341,193,617	0.6%	Rank history: #20 in FY2022, #13 in FY2023, #14 in FY2024 and #10 in FY2025; up 12 since FY2020.
27	United Launch Alliance, L.L.C. 2 awardees, including United Launch Services, LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$319,763,846	0.5%	Rank history: #45 in FY2022, #80 in FY2023, #90 in FY2024 and not on the FY2025 list; up 64 since FY2020.
28	Bechtel Corp 3 awardees, including National Aerospace Solutions, LLC and Bechtel National, Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) WHS (DOD Washington Headquarters Service)	$287,133,523	0.5%	Rank history: #26 in FY2022, #18 in FY2023, #27 in FY2024 and #36 in FY2025; up 5 since FY2020.
29	General Electric Company 7 awardees, including GE Aviation Systems LLC and GE Energy Power Conversion Naval Systems Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$278,043,920	0.5%	Rank history: #30 in FY2022, #29 in FY2023, #21 in FY2024 and #28 in FY2025; up 28 since FY2020.
30	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: #33 in FY2022, #39 in FY2023, #24 in FY2024 and #26 in FY2025; unchanged since FY2020.
31	Battelle Memorial Institute 7 awardees, including Battelle Savannah River Alliance, LLC, Battelle National Biodefense Institute, 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)	$276,935,821	0.5%	Rank history: #21 in FY2022, #22 in FY2023, #29 in FY2024 and #32 in FY2025; down 2 since FY2020.
32	Blue Origin Federation, LLC Top agencies NASA (National Aeronautics and Space Administration)	$252,615,202	0.4%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
33	Medical Technology Enterprise Consortium Top agencies Army (Department of the Army) Navy (Department of the Navy) USUHS (DOD Uniformed Services University of the Health Sciences)	$249,129,113	0.4%	Rank history: #49 in FY2022, #42 in FY2023, #37 in FY2024 and #43 in FY2025; up 6 since FY2020.
34	Textron Inc. 5 awardees, including Bell Textron Inc., Textron Systems Corporation and TRU Simulation + Training Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOT (Department of Transportation)	$227,212,513	0.4%	Rank history: #38 in FY2022, #17 in FY2023, #15 in FY2024 and #13 in FY2025; up 12 since FY2020.
35	Radiance Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$212,405,506	0.4%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
36	The Pennsylvania State University 2 awardees Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency)	$211,648,492	0.4%	Rank history: #31 in FY2022, #36 in FY2023, #34 in FY2024 and #30 in FY2025; unchanged since FY2020.
37	Applied Research Associates, Inc. 3 awardees, including Neya Systems LLC Top agencies DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force) Army (Department of the Army)	$202,498,545	0.3%	Rank history: #34 in FY2022, #37 in FY2023, #40 in FY2024 and #42 in FY2025; up 5 since FY2020.
38	General Atomic Technologies Corporation 4 awardees, including General Atomics Aeronautical Systems, Inc. and General Atomics Top agencies Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency) DISA (Defense Information Systems Agency)	$199,872,316	0.3%	Rank history: #35 in FY2022, #30 in FY2023, #98 in FY2024 and not on the FY2025 list; up 2 since FY2020.
39	CACI International Inc. 10 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and LGS Innovations LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$180,097,271	0.3%	Rank history: #40 in FY2022, #28 in FY2023, #32 in FY2024 and #23 in FY2025; up 16 since FY2020.
40	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)	$178,091,441	0.3%	Rank history: #53 in FY2022, #40 in FY2023, #48 in FY2024 and not on the FY2025 list; down 9 since FY2020.
41	Battelle Savannah River Alliance, LLC Top agencies DOE (Department of Energy)	$171,618,297	0.3%	Rank history: not on the FY2022–FY2023 lists, #39 in FY2024 and #34 in FY2025; new, not ranked in FY2020.
42	Defense Energy Center of Excellence Top agencies USAF (Department of the Air Force)	$166,246,336	0.3%	Rank history: #39 in FY2022, #19 in FY2023, #28 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
43	Carnegie-Mellon University 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$160,052,499	0.3%	Rank history: #42 in FY2022, #51 in FY2023, #41 in FY2024 and #57 in FY2025; up 2 since FY2020.
44	University of Texas System 14 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) NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services)	$147,870,289	0.3%	Rank history: #47 in FY2022, #54 in FY2023, #88 in FY2024 and not on the FY2025 list; up 5 since FY2020.
45	DMD Group Inc. Through Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$144,916,721	0.2%	Rank history: #41 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
46	Sae Government Technologies Top agencies Army (Department of the Army)	$141,352,715	0.2%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
47	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$140,814,440	0.2%	Rank history: #62 in FY2022, #56 in FY2023, #62 in FY2024 and #56 in FY2025; up 14 since FY2020.
48	Assured Information Security, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$135,601,150	0.2%	Rank history: #86 in FY2022, #84 in FY2023, #97 in FY2024 and not on the FY2025 list; down 1 since FY2020.
49	State of California Controllers Office 23 awardees, including The Regents of the University of California, University of California, LOS Angeles and University of California, San Diego Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency)	$133,440,969	0.2%	Rank history: #36 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
50	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$133,382,683	0.2%	Rank history: #50 in FY2022, #61 in FY2023, #80 in FY2024 and #90 in FY2025; down 9 since FY2020.
51	Mantech International Corporation 4 awardees, including Mantech Advanced Systems International, Inc. and Mantech SRS Technologies, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$130,512,086	0.2%	Rank history: #32 in FY2022, #44 in FY2023, #92 in FY2024 and not on the FY2025 list; up 34 since FY2020.
52	Association of Universities for Research In Astronomy, Inc. 2 awardees Top agencies NASA (National Aeronautics and Space Administration)	$128,376,766	0.2%	Rank history: #29 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2020.
53	Southwest Research Institute 2 awardees, including Signature Science LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$124,963,499	0.2%	Rank history: #48 in FY2022, #47 in FY2023, #46 in FY2024 and #45 in FY2025; up 29 since FY2020.
54	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$123,446,975	0.2%	Rank history: #24 in FY2022, #34 in FY2023, #38 in FY2024 and #33 in FY2025; up 20 since FY2020.
55	DCS Corporation 3 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$120,648,317	0.2%	Rank history: #76 in FY2022, #64 in FY2023, #45 in FY2024 and #40 in FY2025; down 1 since FY2020.
56	Advanced Technology International Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$113,273,979	0.2%	Rank history: not on the FY2022–FY2023 lists, #3 in FY2024 and #4 in FY2025; up 218 since FY2020.
57	Westat, Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) Army (Department of the Army)	$113,228,917	0.2%	Rank history: #51 in FY2022, #89 in FY2023, #78 in FY2024 and #96 in FY2025; up 35 since FY2020.
58	Siga Technologies, Inc. Top agencies HHS (Department of Health and Human Services)	$112,567,056	0.2%	Rank history: not on the FY2022 list, #62 in FY2023, #72 in FY2024 and not on the FY2025 list; up 15 since FY2020.
59	Trax International Corporation Top agencies Army (Department of the Army)	$108,766,583	0.2%	Rank history: #66 in FY2022, #74 in FY2023, #76 in FY2024 and #74 in FY2025; up 16 since FY2020.
60	Astrion Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$108,199,451	0.2%	Rank history: #59 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
61	Space Systems/Loral LLC 10 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) Army (Department of the Army)	$105,605,869	0.2%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 74 since FY2020.
62	The Regents of the University of Colorado 4 awardees Top agencies NASA (National Aeronautics and Space Administration) Commerce (Department of Commerce) USAF (Department of the Air Force)	$104,930,746	0.2%	Rank history: #74 in FY2022, #98 in FY2023, not on the FY2024 list and #88 in FY2025; up 18 since FY2020.
63	The Aerospace Corporation Top agencies NASA (National Aeronautics and Space Administration) DOE (Department of Energy) Commerce (Department of Commerce)	$102,294,434	0.2%	Rank history: #65 in FY2022, #59 in FY2023, #51 in FY2024 and #50 in FY2025; up 39 since FY2020.
64	Astrobotic Technology Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$101,908,942	0.2%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
65	University System of Maryland 9 awardees, including University of Maryland, College Park, University of Maryland, Baltimore and University of Maryland Baltimore County Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) OSD (Office of the Secretary of Defense)	$101,877,702	0.2%	Rank history: #64 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
66	Sierra Nevada Company, LLC 5 awardees, including Kutta Technologies, LLC Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) USSOCOM (United States Special Operations Command)	$99,366,593	0.2%	Rank history: #61 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; down 22 since FY2020.
67	Science Systems and Applications, Inc. Top agencies NASA (National Aeronautics and Space Administration) DOI (Department of the Interior)	$97,345,556	0.2%	Rank history: #69 in FY2022, #69 in FY2023, #71 in FY2024 and #76 in FY2025; up 9 since FY2020.
68	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)	$97,197,916	0.2%	Rank history: #60 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 31 since FY2020.
69	The National Advanced Mobility Consortium, Inc. Top agencies Army (Department of the Army)	$95,476,808	0.2%	Rank history: #68 in FY2022, #38 in FY2023, #87 in FY2024 and #58 in FY2025; new, not ranked in FY2020.
70	Perspecta Inc. 7 awardees, including Peraton Labs Inc., Peraton Technology Services Inc. and Analex Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$94,348,240	0.2%	Rank history: not on the FY2022–FY2025 lists; up 58 since FY2020.
71	Danaher Corporation 6 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)	$94,239,838	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	On Assignment, Inc. 5 awardees, including ECS Federal, LLC and Inforeliance LLC Top agencies DISA (Defense Information Systems Agency) OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$93,829,016	0.2%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
73	Technical Resources International, Inc. Top agencies HHS (Department of Health and Human Services)	$90,554,626	0.2%	Rank history: #94 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
74	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)	$89,407,297	0.2%	Rank history: #85 in FY2022, #94 in FY2023, #93 in FY2024 and not on the FY2025 list; up 19 since FY2020.
75	Arctic Slope Regional Corporation 9 awardees, including AS and D, LLC, Analytical Services, Inc. and Asrc Federal System Solutions LLC Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$88,934,074	0.2%	Rank history: #70 in FY2022, #76 in FY2023, #66 in FY2024 and #51 in FY2025; down 12 since FY2020.
76	Ensco Inc. Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) DARPA (Defense Advanced Research Projects Agency)	$87,193,386	0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 27 since FY2020.
77	Government of the United States 3 awardees, including Smithsonian Institution and Commander Navy Installations CMD Top agencies NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$86,547,793	0.1%	Rank history: #44 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; up 38 since FY2020.
78	University of Dayton Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) WHS (DOD Washington Headquarters Service)	$85,728,929	0.1%	Rank history: #84 in FY2022, #70 in FY2023, #54 in FY2024 and #44 in FY2025; up 12 since FY2020.
79	Teledyne Technologies Incorporated 6 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)	$85,234,332	0.1%	Rank history: not on the FY2022 list, #99 in FY2023, #60 in FY2024 and #84 in FY2025; down 7 since FY2020.
80	The Charles Stark Draper Laboratory, Inc. Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$84,799,713	0.1%	Rank history: #78 in FY2022, not on the FY2023 list, #89 in FY2024 and #100 in FY2025; down 1 since FY2020.
81	Calista Corp 2 awardees, including Yulista Support Services LLC and Y-Tech Services, Inc. Top agencies Army (Department of the Army)	$84,313,472	0.1%	Rank history: #81 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 215 since FY2020.
82	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)	$83,212,566	0.1%	Rank history: not on the FY2022–FY2025 lists; down 31 since FY2020.
83	Kratos Defense & Security Solutions, Inc. 9 awardees, including Kratos Unmanned Aerial Systems, Inc., Florida Turbine Technologies, Inc. and Kratos S1, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$82,863,083	0.1%	Rank history: #58 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; up 132 since FY2020.
84	Intuitive Machines, LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$81,948,413	0.1%	Rank history: #75 in FY2022, not on the FY2023 list, #85 in FY2024 and not on the FY2025 list; up 68 since FY2020.
85	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)	$81,229,656	0.1%	Rank history: not on the FY2022–FY2023 lists, #10 in FY2024 and not on the FY2025 list; up 10 since FY2020.
86	Seqirus USA Inc. Through Seqirus Inc. Top agencies HHS (Department of Health and Human Services)	$80,383,271	0.1%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 23 since FY2020.
87	Resilience Government Services, Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$77,822,265	0.1%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
88	Sossec, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$77,611,503	0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
89	HP Enterprise Services LLC 10 awardees, including Peraton Inc., Peraton Labs Inc. and Analex Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$76,080,522	0.1%	Rank history: #55 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; up 55 since FY2020.
90	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)	$75,615,003	0.1%	Rank history: #63 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
91	The University of Alabama System 3 awardees, including The University of Alabama In Huntsville, University of Alabama At Birmingham and University of Alabama Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services)	$73,704,979	0.1%	Rank history: not on the FY2022–FY2025 lists; up 43 since FY2020.
92	ABT Global LLC 2 awardees Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$71,975,575	0.1%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
93	University of Washington 2 awardees Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services)	$71,318,175	0.1%	Rank history: #97 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
94	Assurance Technology Corp Top agencies Navy (Department of the Navy) Commerce (Department of Commerce)	$71,035,244	0.1%	Rank history: #80 in FY2022, #73 in FY2023, not on the FY2024 list and #54 in FY2025; up 23 since FY2020.
95	Frontier Technology Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$69,579,314	0.1%	Rank history: not on the FY2022–FY2025 lists; up 171 since FY2020.
96	Decibel Research, Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army)	$68,489,908	0.1%	Rank history: not on the FY2022–FY2025 lists; up 232 since FY2020.
97	American Electronic Warfare Associates, Incorporated Top agencies Navy (Department of the Navy)	$68,039,752	0.1%	Rank history: #98 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
98	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)	$67,690,431	0.1%	Rank history: #90 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
99	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)	$67,087,849	0.1%	Rank history: #72 in FY2022, #53 in FY2023, #58 in FY2024 and #67 in FY2025; up 40 since FY2020.
100	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$65,746,236	0.1%	Rank history: #57 in FY2022, #55 in FY2023, #57 in FY2024 and #38 in FY2025; down 13 since FY2020.

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100 of 5,394 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC A

Code	Net obligations	Largest contractor
AC National Defense R&D Services	$24,939,094,121	Lockheed Martin Corporation
AR Space R&D Services	$9,643,907,965	California Institute of Technology
AZ Other Research/Development	$7,146,841,757	Lawrence Livermore National Security, LLC
AD Defense (Other) R&D	$6,211,617,557	Lockheed Martin Corporation
AN Health R&D Services	$4,402,245,270	Leidos Holdings, Inc.
AJ General Science and Technology R&D Services	$3,217,680,066	Georgia TECH Research Corp
AS Transportation R&D Services	$192,094,032	General Electric Company
AF Education, Training, Employment, and Social Services R&D Services	$140,766,036	American Institutes for Research In the Behavioral Sciences
AE Economic Growth/Productivity R&D	$130,907,279	Analytic Services Inc.
AB Community and Regional Development R&D Services	$109,721,598	Aerojet Rocketdyne Holdings, Inc.
AG Energy R&D Services	$91,098,049	Bwxt Advanced Technologies LLC
AH Natural Resources and Environment R&D Services	$87,582,411	Consolidated Safety Services Incorporated
AA Agriculture R&D Services	$69,969,428	DAI Global LLC
AT Transportation (Other) R&D	$24,948,420	Noblis, Inc.

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 $58.9 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

Who were the top 10 PSC A contractors in FY2021?

1. Lockheed Martin Corporation ($7.62B), 2. Northrop Grumman Corporation ($3.56B), 3. Lawrence Livermore National Security, LLC ($2.76B), 4. California Institute of Technology ($2.3B), 5. The Boeing Company ($2.23B), 6. RTX Corporation ($2.18B), 7. The Mitre Corporation ($1.46B), 8. Leidos Holdings, Inc. ($1.3B), 9. The Johns Hopkins University ($1.22B), 10. Massachusetts Institute of Technology ($1.18B).

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