Top 100 Contractors in PSC AC22: National Defense R&D Services; Atomic Energy Defense Activities; Applied Research, FY2021

Name: Top 100 Contractors in PSC AC22: National Defense R&D Services; Atomic Energy Defense Activities; Applied Research, FY2021
Creator: GovTribe

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

The top 10 won 80% of FY2021 PSC AC22 contract dollars

Contract obligations: $1,572,636,348 Net of deobligations, by contracts coded PSC AC22
Contractors: 165 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $713 million, 43.3% 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 4 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$712,727,469	43.3%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Analytic Services Inc. Through Advanced Technology International Top agencies USAF (Department of the Air Force)	$288,589,444	17.5%	Rank history: #2 in FY2022, #2 in FY2023, #4 in FY2024 and not on the FY2025 list; unchanged since FY2020.
3	Advanced Technology International Top agencies USAF (Department of the Air Force)	$97,545,313	5.9%	Rank history: not on the FY2022–FY2023 lists, #5 in FY2024 and #5 in FY2025; up 9 since FY2020.
4	RTX Corporation 3 awardees, including Raytheon Company Top agencies USAF (Department of the Air Force)	$61,401,501	3.7%	Rank history: #3 in FY2022, #3 in FY2023, #9 in FY2024 and #9 in FY2025; up 7 since FY2020.
5	Utah State University Through Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$27,763,932	1.7%	Rank history: #13 in FY2022, #26 in FY2023, #40 in FY2024 and not on the FY2025 list; unchanged since FY2020.
6	Northrop Grumman Corporation 10 awardees, including Northrop Grumman Systems Corporation, ATK Launch Systems LLC and ATK Space Systems LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$26,621,753	1.6%	Rank history: #20 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
7	Aerojet Rocketdyne Holdings, Inc. 3 awardees, including Aerojet Rocketdyne, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$26,609,444	1.6%	Rank history: #14 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
8	Honeywell International Inc. 3 awardees Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$25,631,240	1.6%	Rank history: #6 in FY2022, #5 in FY2023, #7 in FY2024 and #7 in FY2025; up 5 since FY2020.
9	The Johns Hopkins University Through The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force)	$23,901,797	1.5%	Rank history: #10 in FY2022, #10 in FY2023, #43 in FY2024 and not on the FY2025 list; down 6 since FY2020.
10	Kbr, Inc. 3 awardees, including Pacific Defense Solutions LLC and KBR Wyle Services, LLC Top agencies USAF (Department of the Air Force)	$22,284,702	1.4%	Rank history: #18 in FY2022, #11 in FY2023, #86 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
11	Linquest Corporation Top agencies USAF (Department of the Air Force)	$21,218,709	1.3%	Rank history: #11 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
12	Bluehalo Labs, LLC Top agencies USAF (Department of the Air Force)	$21,088,627	1.3%	Rank history: #12 in FY2022, #21 in FY2023, #21 in FY2024 and #27 in FY2025; down 3 since FY2020.
13	The Boeing Company 7 awardees, including Millennium Space Systems, Inc. and Spectrolab, Inc. Top agencies USAF (Department of the Air Force)	$20,004,867	1.2%	Rank history: #9 in FY2022, #7 in FY2023, #8 in FY2024 and #19 in FY2025; down 3 since FY2020.
14	Sierra Nevada Company, LLC Top agencies USAF (Department of the Air Force)	$17,065,640	1.0%	Rank history: #7 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
15	Parsons Corporation 2 awardees, including Parsons Government Services Inc. and Polaris Alpha, LLC Top agencies USAF (Department of the Air Force)	$9,999,987	0.6%	Rank history: #15 in FY2022, #31 in FY2023, #38 in FY2024 and not on the FY2025 list; up 17 since FY2020.
16	University of Toledo Top agencies USAF (Department of the Air Force)	$9,923,000	0.6%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
17	Geneva Technologies, Inc. Top agencies USAF (Department of the Air Force)	$7,444,519	0.5%	Rank history: #22 in FY2022, not on the FY2023 list, #32 in FY2024 and #29 in FY2025; up 17 since FY2020.
18	Ball Corp 2 awardees, including BAE Systems Space & Mission Systems Inc. and Ball Aerospace & Technologies Corp. Top agencies USAF (Department of the Air Force)	$7,130,122	0.4%	Rank history: #36 in FY2022, #43 in FY2023, #70 in FY2024 and not on the FY2025 list; up 158 since FY2020.
19	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies USAF (Department of the Air Force)	$6,583,269	0.4%	Rank history: #45 in FY2022, #36 in FY2023, #58 in FY2024 and #21 in FY2025; up 12 since FY2020.
20	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force)	$6,256,551	0.4%	Rank history: not on the FY2022–FY2023 lists, #6 in FY2024 and not on the FY2025 list; up 40 since FY2020.
21	Geost, LLC Top agencies USAF (Department of the Air Force)	$6,200,084	0.4%	Rank history: #5 in FY2022, #8 in FY2023, #22 in FY2024 and #8 in FY2025; new, not ranked in FY2020.
22	Ukpeagvik Inupiat Corpor Through Bowhead Professional Solutions LLC Top agencies Navy (Department of the Navy)	$6,082,081	0.4%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; up 71 since FY2020.
23	BAE Systems Land & Armaments L.P. Through BAE Systems Information & Electronic Systems Integration Inc. Top agencies USAF (Department of the Air Force)	$5,335,600	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Busek Co., Inc. Top agencies USAF (Department of the Air Force)	$4,930,072	0.3%	Rank history: #35 in FY2022, #22 in FY2023, #67 in FY2024 and #42 in FY2025; up 4 since FY2020.
25	Beyond Gravity USA Inc. Top agencies USAF (Department of the Air Force)	$4,262,594	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	X-Bow Launch Systems Inc. Top agencies USAF (Department of the Air Force)	$4,044,107	0.2%	Rank history: #53 in FY2022, not on the FY2023–FY2024 lists and #2 in FY2025; new, not ranked in FY2020.
27	University of New Mexico Top agencies USAF (Department of the Air Force)	$3,440,319	0.2%	Rank history: #26 in FY2022, #33 in FY2023, #35 in FY2024 and #36 in FY2025; up 64 since FY2020.
28	Insurance Services Office Inc. Through Atmospheric & Environmental Research Inc. Top agencies USAF (Department of the Air Force)	$3,372,714	0.2%	Rank history: #25 in FY2022, #34 in FY2023, #30 in FY2024 and #30 in FY2025; up 12 since FY2020.
29	Trustees of Boston College Top agencies USAF (Department of the Air Force)	$3,319,783	0.2%	Rank history: #29 in FY2022, #45 in FY2023, #39 in FY2024 and #33 in FY2025; up 8 since FY2020.
30	Stottler Henke Associates, Inc. Top agencies USAF (Department of the Air Force)	$3,000,000	0.2%	Rank history: #21 in FY2022, #24 in FY2023, #17 in FY2024 and #16 in FY2025; unchanged since FY2020.
31	Deep Space Systems Inc Through Loadpath, LLC Top agencies USAF (Department of the Air Force)	$2,830,799	0.2%	Rank history: #27 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
32	Toyon Research Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,678,630	0.2%	Rank history: not on the FY2022 list, #49 in FY2023, #36 in FY2024 and #35 in FY2025; up 54 since FY2020.
33	L3Harris Technologies, Inc. 3 awardees, including L3 Technologies, Inc. Top agencies USAF (Department of the Air Force)	$2,550,128	0.2%	Rank history: not on the FY2022 list, #46 in FY2023, #24 in FY2024 and #37 in FY2025; down 7 since FY2020.
34	Intelligent Fusion Technology, Inc. Top agencies USAF (Department of the Air Force)	$2,429,150	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	Atmospheric & Environmental Research Inc. Top agencies USAF (Department of the Air Force)	$2,115,180	0.1%	Rank history: not on the FY2022–FY2025 lists; up 53 since FY2020.
36	Polaris Sensor Technologies, LLC Top agencies MDA (DOD Missile Defense Agency)	$2,085,953	0.1%	Rank history: #94 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
37	Microelectronics Research Development Corporation Top agencies USAF (Department of the Air Force)	$2,065,961	0.1%	Rank history: #43 in FY2022, #50 in FY2023, #65 in FY2024 and not on the FY2025 list; down 14 since FY2020.
38	Nokomis, Inc. Top agencies MDA (DOD Missile Defense Agency)	$1,995,386	0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
39	Frontier Aerospace Corp Top agencies NASA (National Aeronautics and Space Administration)	$1,942,526	0.1%	Rank history: #31 in FY2022, not on the FY2023 list, #90 in FY2024 and not on the FY2025 list; up 6 since FY2020.
40	Loadpath, LLC Top agencies USAF (Department of the Air Force)	$1,786,957	0.1%	Rank history: not on the FY2022–FY2023 lists, #51 in FY2024 and not on the FY2025 list; up 1 since FY2020.
41	Strider Technologies, Inc. Top agencies USAF (Department of the Air Force)	$1,750,000	0.1%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
42	Exoanalytic Solutions Inc. Top agencies USAF (Department of the Air Force)	$1,740,551	0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
43	Space Exploration Technologies Corp. Top agencies USAF (Department of the Air Force)	$1,637,961	0.1%	Rank history: not on the FY2022–FY2023 lists, #11 in FY2024 and #17 in FY2025; new, not ranked in FY2020.
44	Physical Sciences Inc. Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$1,552,206	0.1%	Rank history: #38 in FY2022, #77 in FY2023, #76 in FY2024 and #53 in FY2025; up 25 since FY2020.
45	The Regents of the University of Colorado Top agencies USAF (Department of the Air Force)	$1,545,804	0.1%	Rank history: #68 in FY2022, #60 in FY2023, #66 in FY2024 and not on the FY2025 list; up 99 since FY2020.
46	Earth Resources Technology, LLC Top agencies USAF (Department of the Air Force)	$1,535,000	0.1%	Rank history: #57 in FY2022, #47 in FY2023, #44 in FY2024 and #25 in FY2025; up 72 since FY2020.
47	General Sciences Inc. Top agencies MDA (DOD Missile Defense Agency)	$1,530,012	0.1%	Rank history: not on the FY2022–FY2023 lists, #72 in FY2024 and not on the FY2025 list; up 53 since FY2020.
48	Verus Research, LLC Top agencies USAF (Department of the Air Force)	$1,517,294	0.1%	Rank history: #32 in FY2022, #14 in FY2023, #33 in FY2024 and #20 in FY2025; up 152 since FY2020.
49	Caliola Engineering, LLC Top agencies USAF (Department of the Air Force)	$1,499,998	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Enig Associates, Inc. Top agencies USAF (Department of the Air Force)	$1,499,990	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	MTI Systems, Inc. Top agencies USAF (Department of the Air Force)	$1,499,622	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Ideas Engineering & Technology, LLC Top agencies USAF (Department of the Air Force)	$1,490,946	0.1%	Rank history: not on the FY2022–FY2025 lists; up 49 since FY2020.
53	Creare LLC Top agencies MDA (DOD Missile Defense Agency)	$1,379,047	0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; up 165 since FY2020.
54	General Dynamics Corporation 3 awardees, including General Dynamics-Ots, Inc. Top agencies USAF (Department of the Air Force)	$1,357,598	0.1%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
55	Valley TECH Systems, Inc. Top agencies MDA (DOD Missile Defense Agency)	$1,296,876	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
56	BAE Systems PLC Through BAE Systems Information & Electronic Systems Integration Inc. Top agencies USAF (Department of the Air Force)	$1,214,449	0.1%	Rank history: #23 in FY2022, #57 in FY2023, #26 in FY2024 and not on the FY2025 list; unchanged since FY2020.
57	Spectral Sciences, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$1,171,125	0.1%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; up 35 since FY2020.
58	Descartes Labs, Inc. Top agencies USAF (Department of the Air Force)	$1,165,923	0.1%	Rank history: #50 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
59	Parabilis Space Technologies, Inc. Top agencies USAF (Department of the Air Force)	$1,141,505	0.1%	Rank history: not on the FY2022–FY2023 lists, #83 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
60	Innovative Defense Technologies, LLC Top agencies MDA (DOD Missile Defense Agency)	$1,117,139	0.1%	Rank history: not on the FY2022 list, #68 in FY2023 and not on the FY2024–FY2025 lists; down 24 since FY2020.
61	CCI Capco, LLC Top agencies Army (Department of the Army)	$1,087,565	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Swarm Technologies, Inc. Top agencies USAF (Department of the Air Force)	$1,082,901	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Alphacore Inc. Top agencies MDA (DOD Missile Defense Agency)	$999,299	0.1%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
64	Gloyer-Taylor Laboratories Inc. Top agencies MDA (DOD Missile Defense Agency)	$995,064	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Fifth Gait Technologies, Inc. Top agencies MDA (DOD Missile Defense Agency)	$989,880	0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
66	Solaero Technologies Corp. Top agencies USAF (Department of the Air Force)	$907,703	0.1%	Rank history: #17 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; down 41 since FY2020.
67	Southwest Research Institute Top agencies USAF (Department of the Air Force)	$870,000	0.1%	Rank history: #63 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
68	Slingshot Aerospace Inc. Top agencies USAF (Department of the Air Force)	$836,197	0.1%	Rank history: #24 in FY2022, #23 in FY2023, #16 in FY2024 and #12 in FY2025; up 19 since FY2020.
69	Expedition Technology, LLC Top agencies USAF (Department of the Air Force)	$810,000	<0.1%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; up 47 since FY2020.
70	Secmation LLC Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$799,253	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 147 since FY2020.
71	Numerica Corporation Top agencies USAF (Department of the Air Force)	$767,331	<0.1%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; down 18 since FY2020.
72	Benchmark Space Systems Inc. Top agencies USAF (Department of the Air Force)	$761,546	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Microlink Devices Inc. Top agencies USAF (Department of the Air Force)	$750,000	<0.1%	Rank history: #8 in FY2022, #30 in FY2023, #47 in FY2024 and not on the FY2025 list; up 49 since FY2020.
74	Aura Technologies, LLC Top agencies USAF (Department of the Air Force)	$749,999	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Sivananthan Laboratories, Inc. Top agencies USAF (Department of the Air Force)	$749,998	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Advanced Scientific Concepts, LLC Top agencies USAF (Department of the Air Force)	$749,994	<0.1%	Rank history: not on the FY2022–FY2023 lists, #60 in FY2024 and not on the FY2025 list; up 101 since FY2020.
77	Vector Atomic Inc. Top agencies USAF (Department of the Air Force)	$749,987	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Systems & Technology Research LLC Top agencies USAF (Department of the Air Force)	$749,684	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Cellec Technologies, Inc. Top agencies USAF (Department of the Air Force)	$748,170	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Scitec Innovations LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$744,384	<0.1%	Rank history: #4 in FY2022, #4 in FY2023, #2 in FY2024 and #4 in FY2025; down 62 since FY2020.
81	Optimization Technologies, Inc. Top agencies MDA (DOD Missile Defense Agency)	$730,000	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
82	Applied Research Associates, Inc. Top agencies USAF (Department of the Air Force)	$722,333	<0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
83	Maxentric Technologies LLC Top agencies USAF (Department of the Air Force)	$696,434	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 15 since FY2020.
84	Plasma Processes, LLC Top agencies MDA (DOD Missile Defense Agency)	$695,707	<0.1%	Rank history: #87 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; up 67 since FY2020.
85	Intellisense Systems Inc. Top agencies MDA (DOD Missile Defense Agency)	$691,350	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 125 since FY2020.
86	Sentar, Inc. Top agencies MDA (DOD Missile Defense Agency)	$689,944	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
87	Wecoso, Inc. Top agencies MDA (DOD Missile Defense Agency)	$658,236	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
88	Mainstream Engineering Corp Top agencies MDA (DOD Missile Defense Agency)	$651,228	<0.1%	Rank history: not on the FY2022–FY2023 lists, #45 in FY2024 and #26 in FY2025; down 66 since FY2020.
89	Utah State University Space Dynamics Laboratory Top agencies USAF (Department of the Air Force)	$609,189	<0.1%	Rank history: not on the FY2022–FY2023 lists, #41 in FY2024 and #43 in FY2025; up 26 since FY2020.
90	Long Wall Company Top agencies USAF (Department of the Air Force)	$600,000	<0.1%	Rank history: #71 in FY2022, #56 in FY2023, #59 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
91	Peraton Inc. Top agencies USAF (Department of the Air Force)	$575,936	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
92	Danbury Mission Technologies LLC Through Tethers Unlimited, Inc. Top agencies USAF (Department of the Air Force)	$569,712	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Tau Technologies LLC Top agencies USAF (Department of the Air Force)	$560,000	<0.1%	Rank history: #90 in FY2022, #84 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
94	University of Massachusetts Through University of Massachusetts Lowell Top agencies USAF (Department of the Air Force)	$550,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
95	Gohypersonic Incorporated Top agencies MDA (DOD Missile Defense Agency)	$539,039	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 93 since FY2020.
96	The Leland Stanford Junior University Top agencies USAF (Department of the Air Force)	$531,049	<0.1%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 70 since FY2020.
97	Parsons Government Services Inc. Top agencies USAF (Department of the Air Force)	$505,453	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Imsar LLC Top agencies USSOCOM (United States Special Operations Command)	$500,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 55 since FY2020.
99	Modus Operandi, Inc. Top agencies MDA (DOD Missile Defense Agency)	$499,950	<0.1%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
100	Freent Technologies, Inc. Top agencies MDA (DOD Missile Defense Agency)	$499,740	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 165 contractors listed here. See the rest on GovTribe.

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 $1.64 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 AC22 contractors in FY2021?

1. Lockheed Martin Corporation ($713M), 2. Analytic Services Inc. ($289M), 3. Advanced Technology International ($97.5M), 4. RTX Corporation ($61.4M), 5. Utah State University ($27.8M), 6. Northrop Grumman Corporation ($26.6M), 7. Aerojet Rocketdyne Holdings, Inc. ($26.6M), 8. Honeywell International Inc. ($25.6M), 9. The Johns Hopkins University ($23.9M), 10. Kbr, Inc. ($22.3M).

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