Top 100 Contractors in PSC AC: National Defense R&D Services, FY2021

Name: Top 100 Contractors in PSC AC: National Defense R&D Services, FY2021
Creator: GovTribe

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

The top 10 won 58% of FY2021 PSC AC contract dollars

Contract obligations: $24,939,094,121 Net of deobligations, by contracts coded PSC AC or a code under it
Contractors: 2,607 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $6.27 billion, 24.3% 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 33 awardees, including Sikorsky Aircraft Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$6,266,216,442	24.3%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Northrop Grumman Corporation 45 awardees, including Northrop Grumman Systems Corp, Alliant Techsystems Operations LLC and Orbital Sciences LLC Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$2,479,108,035	9.6%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 2 since FY2020.
3	RTX Corporation 38 awardees, including Raytheon Company and Rockwell Collins, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$1,820,130,625	7.1%	Rank history: #3 in FY2022, #3 in FY2023, #4 in FY2024 and #4 in FY2025; up 3 since FY2020.
4	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)	$1,140,779,005	4.4%	Rank history: #5 in FY2022, #4 in FY2023, #6 in FY2024 and #6 in FY2025; up 1 since FY2020.
5	The Boeing Company 26 awardees, including Millennium Space Systems, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$782,115,010	3.0%	Rank history: #7 in FY2022, #8 in FY2023, #5 in FY2024 and #10 in FY2025; down 3 since FY2020.
6	BAE Systems PLC 15 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)	$680,721,672	2.6%	Rank history: #10 in FY2022, #11 in FY2023, #12 in FY2024 and #11 in FY2025; up 1 since FY2020.
7	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) USAF (Department of the Air Force)	$503,726,236	2.0%	Rank history: #6 in FY2022, #7 in FY2023, #39 in FY2024 and not on the FY2025 list; up 4 since FY2020.
8	Analytic Services Inc. Through Advanced Technology International Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$450,238,362	1.7%	Rank history: #8 in FY2022, #6 in FY2023, #21 in FY2024 and not on the FY2025 list; up 1 since FY2020.
9	Jacobs Engineering Group Inc. 6 awardees, including Amentum Technology, Inc. and The Keyw Corporation Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$420,047,967	1.6%	Rank history: #13 in FY2022, #16 in FY2023, #30 in FY2024 and not on the FY2025 list; up 1 since FY2020.
10	Leidos Holdings, Inc. 8 awardees, including Leidos, Inc. and Dynetics, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$380,740,662	1.5%	Rank history: #14 in FY2022, #17 in FY2023, #22 in FY2024 and #20 in FY2025; up 3 since FY2020.
11	Science Applications International Corporation 4 awardees, including Engility Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$362,034,878	1.4%	Rank history: #11 in FY2022, #12 in FY2023, #14 in FY2024 and #15 in FY2025; up 12 since FY2020.
12	General Dynamics Corporation 21 awardees, including General Dynamics Mission Systems, Inc., General Dynamics Land Systems Inc. and Electric Boat Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$332,524,535	1.3%	Rank history: #17 in FY2022, #24 in FY2023, #19 in FY2024 and #12 in FY2025; down 4 since FY2020.
13	L3Harris Technologies, Inc. 30 awardees, including L3 Technologies, Inc., L3Harris Technologies Integrated Systems L.P. and L3Harris Interstate Electronics Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$280,920,232	1.1%	Rank history: #9 in FY2022, #19 in FY2023, #11 in FY2024 and #16 in FY2025; up 1 since FY2020.
14	Textron Inc. 2 awardees, including Bell Textron Inc. and Textron Systems Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$225,466,049	0.9%	Rank history: #19 in FY2022, #9 in FY2023, #7 in FY2024 and #8 in FY2025; up 1 since FY2020.
15	General Electric Company 5 awardees, including GE Aviation Systems LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$210,980,647	0.8%	Rank history: #18 in FY2022, #22 in FY2023, #16 in FY2024 and #25 in FY2025; up 15 since FY2020.
16	Booz Allen Hamilton Holding Corporation 3 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)	$194,492,818	0.8%	Rank history: #12 in FY2022, #13 in FY2023, #8 in FY2024 and #9 in FY2025; up 1 since FY2020.
17	Defense Energy Center of Excellence Top agencies USAF (Department of the Air Force)	$166,246,336	0.6%	Rank history: #20 in FY2022, #10 in FY2023, #18 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
18	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) MDA (DOD Missile Defense Agency)	$156,998,721	0.6%	Rank history: #21 in FY2022, #21 in FY2023, #68 in FY2024 and not on the FY2025 list; up 4 since FY2020.
19	Sae Government Technologies Top agencies Army (Department of the Army)	$141,352,715	0.5%	Rank history: #32 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
20	Carnegie-Mellon University 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$137,953,328	0.5%	Rank history: #26 in FY2022, #30 in FY2023, #31 in FY2024 and #43 in FY2025; down 2 since FY2020.
21	Space Exploration Technologies Corp. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) SDA (Space Development Agency)	$118,690,252	0.5%	Rank history: #24 in FY2022, #46 in FY2023, #40 in FY2024 and #34 in FY2025; up 85 since FY2020.
22	Kbr, Inc. 8 awardees, including KBR Wyle Services, LLC and Pacific Defense Solutions LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$116,878,351	0.5%	Rank history: #16 in FY2022, #14 in FY2023, #36 in FY2024 and not on the FY2025 list; up 79 since FY2020.
23	Torch Technologies Inc. Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$112,849,885	0.4%	Rank history: #15 in FY2022, #23 in FY2023, #28 in FY2024 and #24 in FY2025; up 57 since FY2020.
24	CACI International Inc. 8 awardees, including Caci, Inc. - Federal, Caci Technologies, LLC and Mastodon Design LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$110,906,455	0.4%	Rank history: #30 in FY2022, #20 in FY2023, #24 in FY2024 and #19 in FY2025; up 10 since FY2020.
25	Trax International Corporation Top agencies Army (Department of the Army)	$108,766,583	0.4%	Rank history: #31 in FY2022, #39 in FY2023, #50 in FY2024 and #53 in FY2025; down 1 since FY2020.
26	Advanced Technology International Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$104,733,480	0.4%	Rank history: not on the FY2022–FY2023 lists, #3 in FY2024 and #3 in FY2025; up 107 since FY2020.
27	Radiance Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$102,504,201	0.4%	Rank history: #36 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
28	Alion Science and Technology Corporation 2 awardees, including HII Mission Technologies Corp Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) Army (Department of the Army)	$100,079,496	0.4%	Rank history: not on the FY2022 list, #18 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
29	Assured Information Security, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$93,562,426	0.4%	Rank history: #46 in FY2022, #54 in FY2023, #67 in FY2024 and #74 in FY2025; new, not ranked in FY2020.
30	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$90,178,339	0.3%	Rank history: #45 in FY2022, #32 in FY2023, #44 in FY2024 and #46 in FY2025; up 24 since FY2020.
31	Battelle Memorial Institute Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$86,654,624	0.3%	Rank history: #28 in FY2022, #27 in FY2023, #29 in FY2024 and #35 in FY2025; up 98 since FY2020.
32	Sierra Nevada Company, LLC 3 awardees, including Kutta Technologies, LLC Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) Navy (Department of the Navy)	$82,934,530	0.3%	Rank history: #40 in FY2022, #38 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
33	Calista Corp 2 awardees, including Yulista Support Services LLC and Y-Tech Services, Inc. Top agencies Army (Department of the Army)	$81,220,027	0.3%	Rank history: #42 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 88 since FY2020.
34	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) DARPA (Defense Advanced Research Projects Agency)	$79,909,966	0.3%	Rank history: #38 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
35	The Pennsylvania State University Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service) DARPA (Defense Advanced Research Projects Agency)	$77,713,148	0.3%	Rank history: #23 in FY2022, #25 in FY2023, #27 in FY2024 and #22 in FY2025; new, not ranked in FY2020.
36	Kratos Defense & Security Solutions, Inc. 6 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)	$73,683,679	0.3%	Rank history: #33 in FY2022, #44 in FY2023, #96 in FY2024 and not on the FY2025 list; up 38 since FY2020.
37	University of Texas System 4 awardees, including University of Texas At Austin, The University of Texas At El Paso and The University of Texas At San Antonio Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) Army (Department of the Army)	$72,454,692	0.3%	Rank history: #34 in FY2022, #41 in FY2023, #65 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
38	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) Navy (Department of the Navy)	$70,738,065	0.3%	Rank history: #43 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
39	Decibel Research, Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army)	$68,489,908	0.3%	Rank history: not on the FY2022–FY2025 lists; up 64 since FY2020.
40	Mantech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$65,516,099	0.3%	Rank history: #27 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
41	Frontier Technology Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$64,120,440	0.2%	Rank history: #54 in FY2022, #56 in FY2023, #76 in FY2024 and #92 in FY2025; up 78 since FY2020.
42	Range Generation Next LLC Top agencies Army (Department of the Army)	$63,871,126	0.2%	Rank history: #69 in FY2022, #63 in FY2023, #79 in FY2024 and not on the FY2025 list; down 7 since FY2020.
43	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)	$61,434,879	0.2%	Rank history: #75 in FY2022, not on the FY2023–FY2024 lists and #72 in FY2025; up 9 since FY2020.
44	Astrion Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$61,181,503	0.2%	Rank history: #29 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; up 146 since FY2020.
45	Arctic Slope Regional Corporation 5 awardees, including Analytical Services, Inc., AS and D, LLC and Asrc Federal Field Services, LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Army (Department of the Army)	$60,842,450	0.2%	Rank history: #44 in FY2022, #47 in FY2023, #53 in FY2024 and #44 in FY2025; down 9 since FY2020.
46	American Electronic Warfare Associates, Incorporated Top agencies Navy (Department of the Navy)	$58,925,448	0.2%	Rank history: #51 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
47	Ball Corp 2 awardees, including Ball Aerospace & Technologies Corp. and BAE Systems Space & Mission Systems Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$57,482,764	0.2%	Rank history: #65 in FY2022, #31 in FY2023, #63 in FY2024 and not on the FY2025 list; up 8 since FY2020.
48	Intuitive Research and Technology Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$57,474,802	0.2%	Rank history: #47 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
49	Bluehalo, LLC Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) NGA (Department of Defense National Geospatial Intelligence Agency)	$57,121,630	0.2%	Rank history: #58 in FY2022, #43 in FY2023, #69 in FY2024 and not on the FY2025 list; up 9 since FY2020.
50	The Mitre Corporation Top agencies OSD (Office of the Secretary of Defense) DHS (Department of Homeland Security) AAFES (Department of Defense Army and Air Force Exchange Service)	$54,966,913	0.2%	Rank history: #4 in FY2022, #5 in FY2023, #10 in FY2024 and #13 in FY2025; new, not ranked in FY2020.
51	Parsons Corporation 8 awardees, including Parsons Government Services Inc., Polaris Alpha Advanced Systems Inc. and Ndp, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$53,090,836	0.2%	Rank history: #66 in FY2022, #65 in FY2023, #88 in FY2024 and #55 in FY2025; down 24 since FY2020.
52	Applied Research Associates, Inc. 2 awardees, including Neya Systems LLC Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) OSD (Office of the Secretary of Defense)	$52,589,716	0.2%	Rank history: #49 in FY2022, #29 in FY2023, #34 in FY2024 and #37 in FY2025; up 7 since FY2020.
53	HP Enterprise Services LLC 9 awardees, including Peraton Inc., Peraton Labs Inc. and Analex Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$52,030,748	0.2%	Rank history: #48 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; up 29 since FY2020.
54	DMD Group Inc. Through Intrepid LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$49,963,422	0.2%	Rank history: #50 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
55	Leonardo S.p.A. 7 awardees, including DRS Systems, Inc., Advanced Acoustic Concepts, LLC and DRS Network & Imaging Systems, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$48,367,196	0.2%	Rank history: not on the FY2022–FY2025 lists; up 81 since FY2020.
56	Seakr Engineering, LLC Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$47,383,326	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	University of Dayton Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency) Army (Department of the Army)	$47,152,468	0.2%	Rank history: #56 in FY2022, #52 in FY2023, #47 in FY2024 and #33 in FY2025; down 14 since FY2020.
58	DCS Corporation 2 awardees Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$45,093,165	0.2%	Rank history: #83 in FY2022, #68 in FY2023, #32 in FY2024 and #30 in FY2025; down 27 since FY2020.
59	BAE Systems Land & Armaments L.P. 10 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$43,863,529	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Seacorp, LLC Top agencies Navy (Department of the Navy)	$41,487,183	0.2%	Rank history: #61 in FY2022, #50 in FY2023, #48 in FY2024 and #57 in FY2025; up 42 since FY2020.
61	General Technical Services LLC Top agencies Army (Department of the Army)	$40,898,061	0.2%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
62	Perspecta Inc. 6 awardees, including Peraton Technology Services Inc., Peraton Labs Inc. and Analex Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$39,089,963	0.2%	Rank history: not on the FY2022–FY2025 lists; up 101 since FY2020.
63	Sonalysts Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$38,509,234	0.1%	Rank history: not on the FY2022 list, #84 in FY2023, not on the FY2024 list and #83 in FY2025; down 17 since FY2020.
64	Advanced Core Concepts LLC 3 awardees, including Arctos Technology Solutions, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$37,959,418	0.1%	Rank history: not on the FY2022–FY2025 lists; up 412 since FY2020.
65	Honeywell International Inc. 8 awardees Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) DARPA (Defense Advanced Research Projects Agency)	$37,928,363	0.1%	Rank history: #78 in FY2022, not on the FY2023–FY2024 lists and #81 in FY2025; down 1 since FY2020.
66	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$36,988,279	0.1%	Rank history: #59 in FY2022, #55 in FY2023, #81 in FY2024 and #89 in FY2025; up 56 since FY2020.
67	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$36,954,599	0.1%	Rank history: not on the FY2022–FY2023 lists, #9 in FY2024 and not on the FY2025 list; up 71 since FY2020.
68	Cybex, LLC Top agencies Army (Department of the Army)	$36,327,672	0.1%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
69	Icr, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DTRA (Defense Threat Reduction Agency)	$34,781,521	0.1%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
70	Physical Sciences Inc. 3 awardees, including Faraday Technology, Inc. and Q-Peak, Incorporated Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$33,981,986	0.1%	Rank history: #63 in FY2022, #89 in FY2023, #92 in FY2024 and #84 in FY2025; up 115 since FY2020.
71	York Space Systems LLC Top agencies OSD (Office of the Secretary of Defense)	$33,489,893	0.1%	Rank history: #41 in FY2022, #26 in FY2023, #25 in FY2024 and #45 in FY2025; up 44 since FY2020.
72	General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$32,130,732	0.1%	Rank history: #64 in FY2022, #73 in FY2023, #75 in FY2024 and not on the FY2025 list; down 30 since FY2020.
73	Camgian Corporation Top agencies Army (Department of the Army)	$31,979,564	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	J.f. Taylor, Inc. Top agencies Navy (Department of the Navy)	$31,326,084	0.1%	Rank history: #80 in FY2022, #95 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
75	The University of Alabama System 3 awardees, including The University of Alabama In Huntsville, University of Alabama and University of Alabama At Birmingham Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$30,684,409	0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 53 since FY2020.
76	Dzyne Technologies, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$30,535,865	0.1%	Rank history: not on the FY2022–FY2024 lists and #76 in FY2025; down 48 since FY2020.
77	Amentum Services, Inc. 2 awardees, including Dyncorp International LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$29,362,323	0.1%	Rank history: #35 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
78	Riverside Research Institute 2 awardees, including Applied Research Solutions, Inc. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DARPA (Defense Advanced Research Projects Agency)	$29,187,804	0.1%	Rank history: #79 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
79	Innovative Defense Technologies, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$28,935,732	0.1%	Rank history: #71 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
80	Sossec, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$28,920,192	0.1%	Rank history: #60 in FY2022, #99 in FY2023, #98 in FY2024 and not on the FY2025 list; down 31 since FY2020.
81	Aerojet Rocketdyne Holdings, Inc. 5 awardees, including Aerojet Rocketdyne, Inc. and Aerojet Rocketdyne of DE, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$27,433,677	0.1%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
82	American Lightweight Materials Manufacturing Innovation Institute Top agencies Navy (Department of the Navy) Army (Department of the Army)	$26,905,891	0.1%	Rank history: not on the FY2022–FY2025 lists; up 314 since FY2020.
83	Computer Sciences Corporation Through PAE Applied Technologies LLC Top agencies Navy (Department of the Navy)	$26,266,701	0.1%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
84	Toyon Research Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$25,841,574	0.1%	Rank history: #72 in FY2022, #91 in FY2023, #85 in FY2024 and not on the FY2025 list; up 14 since FY2020.
85	Colsa Corp Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) Army (Department of the Army)	$25,840,929	0.1%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
86	Axient LLC Top agencies USAF (Department of the Air Force)	$25,720,239	0.1%	Rank history: not on the FY2022–FY2025 lists; down 60 since FY2020.
87	Linquest Corporation 3 awardees, including The Perduco Group, Inc. Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$25,012,782	0.1%	Rank history: #82 in FY2022, #67 in FY2023, #59 in FY2024 and #63 in FY2025; down 22 since FY2020.
88	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) OSD (Office of the Secretary of Defense)	$24,314,915	0.1%	Rank history: not on the FY2022–FY2025 lists; down 16 since FY2020.
89	Bluehalo Labs, LLC Top agencies USAF (Department of the Air Force)	$24,069,203	0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
90	Chesapeake Technology International, Corp. Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$23,577,538	0.1%	Rank history: #86 in FY2022, #92 in FY2023, #97 in FY2024 and not on the FY2025 list; down 15 since FY2020.
91	Modern Technology Solutions, Inc. Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army) USAF (Department of the Air Force)	$23,425,014	0.1%	Rank history: not on the FY2022–FY2024 lists and #40 in FY2025; down 12 since FY2020.
92	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force)	$23,333,717	0.1%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
93	Teledyne Technologies Incorporated 4 awardees, including Teledyne Brown Engineering, Inc., Teledyne Scientific & Imaging, LLC and Teledyne Flir Defense, LLC Top agencies Army (Department of the Army) WHS (DOD Washington Headquarters Service) Navy (Department of the Navy)	$22,900,481	0.1%	Rank history: #89 in FY2022, #97 in FY2023, #58 in FY2024 and #73 in FY2025; down 55 since FY2020.
94	Serco North America (Holdings) Inc 3 awardees, including Whitney Bradley & Brown, Inc. and Serco Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$22,744,371	0.1%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; up 157 since FY2020.
95	The Corporation of Mercer University Top agencies USAF (Department of the Air Force)	$22,675,586	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
96	Corvid Technologies, LLC Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) USAF (Department of the Air Force)	$22,638,299	0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
97	Five Stones Research Corporation Top agencies Army (Department of the Army)	$22,414,221	0.1%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
98	Quantech Services Inc. Top agencies USAF (Department of the Air Force)	$22,238,110	0.1%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
99	Technology Service Corp 2 awardees, including Praxis, Inc. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$22,135,252	0.1%	Rank history: not on the FY2022 list, #86 in FY2023, not on the FY2024 list and #69 in FY2025; down 12 since FY2020.
100	Consortium Management Group, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$22,010,355	0.1%	Rank history: #92 in FY2022, #80 in FY2023, not on the FY2024 list and #52 in FY2025; up 32 since FY2020.

Show 75 more

100 of 2,607 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC AC

Code	Net obligations	Largest contractor
AC24 National Defense R&D Services; Atomic Energy Defense Activities; R&D Administrative Expenses	$3,997,356,465	Lockheed Martin Corporation
AC13 National Defense R&D Services; Department of Defense – Military; Experimental Development	$3,408,294,986	Lockheed Martin Corporation
AC12 National Defense R&D Services; Department of Defense – Military; Applied Research	$1,952,623,836	Lockheed Martin Corporation
AC14 National Defense R&D Services; Department of Defense – Military; R&D Administrative Expenses	$1,664,954,311	Lockheed Martin Corporation
AC23 National Defense R&D Services; Atomic Energy Defense Activities; Experimental Development	$1,663,800,113	Jacobs Engineering Group Inc.
AC32 National Defense R&D Services; Defense-Related Activities; Applied Research	$1,648,625,674	The Johns Hopkins University
AC22 National Defense R&D Services; Atomic Energy Defense Activities; Applied Research	$1,572,636,348	Lockheed Martin Corporation
AC61 R&D – Defense System: Electronics/Communication Equipment (Basic Research)	$1,471,618,739	Massachusetts Institute of Technology
AC15 National Defense R&D Services; Department of Defense – Military; R&D Facilities & Major Equipment	$1,226,172,942	Lockheed Martin Corporation
AC63 R&D – Defense System: Electronics/Communication Equipment (Advanced Development)	$629,673,451	Northrop Grumman Corporation
AC62 R&D – Defense System: Electronics/Communication Equipment (Applied Research/Exploratory Development)	$479,901,173	RTX Corporation
AC33 National Defense R&D Services; Defense-Related Activities; Experimental Development	$477,593,771	Space Exploration Technologies Corp.
AC11 National Defense R&D Services; Department of Defense – Military; Basic Research	$431,436,366	RTX Corporation
AC64 R&D – Defense System: Electronics/Communication Equipment (Engineering Development)	$397,331,717	RTX Corporation
AC21 National Defense R&D Services; Atomic Energy Defense Activities; Basic Research	$356,571,102	Science Applications International Corporation
AC53 R&D – Defense System: Weapons (Advanced Development)	$228,189,408	Leidos Holdings, Inc.
AC31 National Defense R&D Services; Defense-Related Activities; Basic Research	$210,532,022	General Dynamics Corporation
AC52 R&D – Defense System: Weapons (Applied Research/Exploratory Development)	$128,887,865	Leidos Holdings, Inc.
AC34 National Defense R&D Services; Defense-Related Activities; R&D Administrative Expenses	$79,435,244	Seacorp, LLC

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 $25.8 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 AC contractors in FY2021?

1. Lockheed Martin Corporation ($6.27B), 2. Northrop Grumman Corporation ($2.48B), 3. RTX Corporation ($1.82B), 4. Massachusetts Institute of Technology ($1.14B), 5. The Boeing Company ($782M), 6. BAE Systems PLC ($681M), 7. The Johns Hopkins University ($504M), 8. Analytic Services Inc. ($450M), 9. Jacobs Engineering Group Inc. ($420M), 10. Leidos Holdings, Inc. ($381M).

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