Top 100 Contractors in PSC AC13: National Defense R&D Services; Department of Defense – Military; Experimental Development, FY2021

Name: Top 100 Contractors in PSC AC13: National Defense R&D Services; Department of Defense – Military; Experimental Development, FY2021
Creator: GovTribe

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

The top 10 won 67% of FY2021 PSC AC13 contract dollars

Contract obligations: $3,408,294,986 Net of deobligations, by contracts coded PSC AC13
Contractors: 432 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $804 million, 22.4% 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 14 awardees Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army) Navy (Department of the Navy)	$804,478,978	22.4%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 5 since FY2020.
2	Northrop Grumman Corporation 12 awardees, including Northrop Grumman Systems Corporation and Alliant Techsystems Operations LLC Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$451,748,439	12.6%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since FY2020.
3	RTX Corporation 12 awardees, including Raytheon Company, Rockwell Collins, Inc. and Raytheon Applied Signal Technology, Inc. Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$306,585,160	8.5%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and #5 in FY2025; up 11 since FY2020.
4	The Boeing Company 12 awardees, including Millennium Space Systems, Inc. and Argon ST, Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) DARPA (Defense Advanced Research Projects Agency)	$245,181,035	6.8%	Rank history: #6 in FY2022, #8 in FY2023, #7 in FY2024 and #6 in FY2025; down 3 since FY2020.
5	Defense Energy Center of Excellence Top agencies USAF (Department of the Air Force)	$166,246,336	4.6%	Rank history: #7 in FY2022, #4 in FY2023, #8 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
6	Analytic Services Inc. Through Advanced Technology International Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$132,556,952	3.7%	Rank history: #4 in FY2022, #5 in FY2023, #11 in FY2024 and not on the FY2025 list; up 9 since FY2020.
7	Assured Information Security, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$91,987,683	2.6%	Rank history: #12 in FY2022, #18 in FY2023, #23 in FY2024 and #25 in FY2025; new, not ranked in FY2020.
8	Jacobs Engineering Group Inc. 3 awardees, including Amentum Technology, Inc. and The Keyw Corporation Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Army (Department of the Army)	$85,318,676	2.4%	Rank history: #9 in FY2022, #12 in FY2023, #36 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
9	BAE Systems PLC 6 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$62,562,510	1.7%	Rank history: #13 in FY2022, #11 in FY2023, #14 in FY2024 and #12 in FY2025; up 32 since FY2020.
10	Astrion Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$61,181,503	1.7%	Rank history: #10 in FY2022, #16 in FY2023, #44 in FY2024 and not on the FY2025 list; up 1 since FY2020.
11	Seakr Engineering, LLC Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency)	$47,383,326	1.3%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
12	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$43,216,382	1.2%	Rank history: #19 in FY2022, #15 in FY2023, #18 in FY2024 and #19 in FY2025; new, not ranked in FY2020.
13	General Atomic Technologies Corporation 2 awardees, including General Atomics and General Atomics Aeronautical Systems, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) DIA (Defense Intelligence Agency) Army (Department of the Army)	$36,814,395	1.0%	Rank history: #8 in FY2022, #10 in FY2023, #39 in FY2024 and not on the FY2025 list; down 9 since FY2020.
14	General Electric Company Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$32,693,874	0.9%	Rank history: #21 in FY2022, #28 in FY2023, #38 in FY2024 and #38 in FY2025; down 1 since FY2020.
15	Dzyne Technologies, LLC Top agencies USAF (Department of the Air Force)	$29,114,108	0.8%	Rank history: #48 in FY2022, #86 in FY2023, #58 in FY2024 and #31 in FY2025; down 13 since FY2020.
16	Kratos Defense & Security Solutions, Inc. 4 awardees, including Kratos Unmanned Aerial Systems, Inc., Florida Turbine Technologies, Inc. and Kratos Defense & Rocket Support Services, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$25,856,851	0.7%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; down 9 since FY2020.
17	L3Harris Technologies, Inc. 5 awardees, including L3Harris Technologies Integrated Systems L.P. and L3 Technologies, Inc. Top agencies MDA (DOD Missile Defense Agency) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$21,093,944	0.6%	Rank history: #5 in FY2022, #7 in FY2023, #6 in FY2024 and #7 in FY2025; new, not ranked in FY2020.
18	Advanced Core Concepts LLC Through Arctos Technology Solutions, LLC Top agencies USAF (Department of the Air Force)	$20,637,969	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	Raytheon Company 2 awardees Top agencies Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency) NASA (National Aeronautics and Space Administration)	$20,532,957	0.6%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.
20	Leonardo S.p.A. 2 awardees, including DRS Systems, Inc. and Advanced Acoustic Concepts, LLC Top agencies Navy (Department of the Navy)	$19,444,710	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
21	North Point Defense Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$18,273,272	0.5%	Rank history: #33 in FY2022, #93 in FY2023, #34 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
22	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. and Dynetics, Inc. Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$17,453,079	0.5%	Rank history: #14 in FY2022, #20 in FY2023, #22 in FY2024 and #24 in FY2025; new, not ranked in FY2020.
23	Pacific Marine & Supply Company Ltd Through Pacmar Technologies LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$16,907,064	0.5%	Rank history: #22 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
24	Aerovironment, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$15,638,035	0.4%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
25	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$15,517,569	0.4%	Rank history: #40 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
26	Applied Research Associates, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$14,365,650	0.4%	Rank history: #43 in FY2022, #51 in FY2023, #45 in FY2024 and #63 in FY2025; down 18 since FY2020.
27	American Lightweight Materials Manufacturing Innovation Institute Top agencies Navy (Department of the Navy)	$14,121,380	0.4%	Rank history: not on the FY2022–FY2024 lists and #87 in FY2025; new, not ranked in FY2020.
28	Stephenson Stellar Corporation Top agencies USAF (Department of the Air Force)	$14,001,000	0.4%	Rank history: not on the FY2022 list, #79 in FY2023, not on the FY2024 list and #56 in FY2025; new, not ranked in FY2020.
29	Cybex, LLC Top agencies Army (Department of the Army)	$13,643,000	0.4%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
30	Noblis MSD LLC Top agencies Navy (Department of the Navy)	$10,938,080	0.3%	Rank history: not on the FY2022–FY2023 lists, #98 in FY2024 and #88 in FY2025; new, not ranked in FY2020.
31	National Security Technology Accelerator Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service)	$10,723,676	0.3%	Rank history: #15 in FY2022, #6 in FY2023, #5 in FY2024 and #4 in FY2025; new, not ranked in FY2020.
32	Parsons Corporation 3 awardees, including Parsons Government Services Inc., Polaris Alpha, LLC and Polaris Alpha Advanced Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$9,603,820	0.3%	Rank history: #70 in FY2022, not on the FY2023 list, #93 in FY2024 and #60 in FY2025; down 5 since FY2020.
33	Grammatech, Inc. Top agencies Navy (Department of the Navy)	$9,135,814	0.3%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
34	Oceaneering International Inc. Top agencies Navy (Department of the Navy)	$8,667,679	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
35	BAE Systems Land & Armaments L.P. 4 awardees, including BAE Systems Information & Electronic Systems Integration Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$8,593,719	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Gray Analytics, Inc. Top agencies MDA (DOD Missile Defense Agency)	$8,553,124	0.2%	Rank history: #57 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
37	Space Exploration Technologies Corp. Top agencies USAF (Department of the Air Force)	$8,499,789	0.2%	Rank history: #18 in FY2022, #19 in FY2023, #17 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
38	Phase Sensitive Innovations Inc. Top agencies USAF (Department of the Air Force)	$8,444,300	0.2%	Rank history: not on the FY2022 list, #68 in FY2023, #51 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
39	Ball Corp Through BAE Systems Space & Mission Systems Inc. Top agencies USAF (Department of the Air Force)	$8,372,345	0.2%	Rank history: #65 in FY2022, #25 in FY2023, #25 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
40	Globe Machine Manufacturing Company Top agencies USAF (Department of the Air Force)	$8,296,800	0.2%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
41	CACI International Inc. Through Caci Inc - Federal Top agencies DARPA (Defense Advanced Research Projects Agency)	$7,916,785	0.2%	Rank history: #49 in FY2022, #58 in FY2023, #63 in FY2024 and #27 in FY2025; new, not ranked in FY2020.
42	Advanced Technology International Top agencies Navy (Department of the Navy)	$7,188,167	0.2%	Rank history: not on the FY2022–FY2023 lists, #4 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
43	Honeywell International Inc. Top agencies USAF (Department of the Air Force)	$7,163,567	0.2%	Rank history: #60 in FY2022, not on the FY2023–FY2024 lists and #99 in FY2025; down 27 since FY2020.
44	The Pennsylvania State University Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service) DARPA (Defense Advanced Research Projects Agency)	$6,924,761	0.2%	Rank history: #17 in FY2022, #29 in FY2023, #37 in FY2024 and #29 in FY2025; new, not ranked in FY2020.
45	Fregata Systems LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$6,806,248	0.2%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
46	Five Stones Research Corporation Top agencies Army (Department of the Army)	$6,771,800	0.2%	Rank history: #36 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
47	Gryphon Technologies, Inc. 2 awardees, including Gryphon Technologies, L.C. and Schafer Government Services, LLC Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$6,564,154	0.2%	Rank history: #95 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
48	Scientific Applications & Research Associates, Inc. Top agencies USAF (Department of the Air Force)	$6,490,041	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Perspecta Inc. 2 awardees, including Peraton Labs Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$6,429,824	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Sri International Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) DARPA (Defense Advanced Research Projects Agency)	$6,402,661	0.2%	Rank history: #31 in FY2022, #52 in FY2023, #64 in FY2024 and #74 in FY2025; new, not ranked in FY2020.
51	Par Technology Corporation Through Par Government Systems Corporation Top agencies USAF (Department of the Air Force)	$5,899,113	0.2%	Rank history: not on the FY2022 list, #100 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
52	60 Degrees Pharmaceuticals, Inc. Top agencies Army (Department of the Army)	$5,719,814	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Mile Two LLC Top agencies USAF (Department of the Air Force)	$5,690,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Beacon Interactive Systems LLC Top agencies USAF (Department of the Air Force)	$5,523,219	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Mantech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies Army (Department of the Army)	$5,493,122	0.2%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
56	University of Dayton Top agencies USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$5,423,637	0.2%	Rank history: not on the FY2022 list, #55 in FY2023, #28 in FY2024 and #22 in FY2025; down 38 since FY2020.
57	Space Systems/Loral LLC 2 awardees, including Maxar Mission Solutions Inc. Top agencies USAF (Department of the Air Force)	$5,262,632	0.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
58	RE2 ,Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$5,091,904	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Epsilon Systems Solutions, Inc. 2 awardees, including Epsilon C5I Inc. Top agencies Navy (Department of the Navy)	$4,945,958	0.1%	Rank history: #79 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
60	Stottler Henke Associates, Inc. Top agencies Navy (Department of the Navy)	$4,899,963	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Advanced Silicon Carbide Materials LLC Top agencies MDA (DOD Missile Defense Agency)	$4,886,340	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Orbia Fluor & Energy Materials Usa, Inc. Top agencies Navy (Department of the Navy)	$4,820,777	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Simventions Inc. Top agencies Navy (Department of the Navy)	$4,808,274	0.1%	Rank history: not on the FY2022–FY2025 lists; down 40 since FY2020.
64	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$4,671,535	0.1%	Rank history: #11 in FY2022, #22 in FY2023, #12 in FY2024 and #18 in FY2025; down 59 since FY2020.
65	Nextech Solutions LLC 2 awardees Top agencies Army (Department of the Army)	$4,455,446	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Third Wave Systems, Inc. Top agencies USAF (Department of the Air Force)	$4,387,287	0.1%	Rank history: #84 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; down 45 since FY2020.
67	Frontier Technology Inc. Top agencies USAF (Department of the Air Force)	$4,294,962	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	W. & O. Supply Inc. Top agencies Army (Department of the Army)	$4,268,681	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Matsys Incorporated Top agencies Army (Department of the Army) Navy (Department of the Navy)	$4,195,927	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	The Charles Stark Draper Laboratory, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$4,069,156	0.1%	Rank history: #86 in FY2022, #85 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
71	Collaborative Composite Solutions Corporation Top agencies Army (Department of the Army)	$4,016,883	0.1%	Rank history: #63 in FY2022, #70 in FY2023, not on the FY2024 list and #42 in FY2025; new, not ranked in FY2020.
72	Noblis, Inc. 2 awardees, including Noblis MSD LLC Top agencies Navy (Department of the Navy)	$3,978,514	0.1%	Rank history: #41 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
73	Metron Incorporated Top agencies DARPA (Defense Advanced Research Projects Agency)	$3,921,818	0.1%	Rank history: #97 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
74	Altus Technical Solutions LLC Top agencies Navy (Department of the Navy)	$3,872,051	0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; down 55 since FY2020.
75	Spirit Aerosystems Holdings, Inc. Through Spirit Aerosystems Inc. Top agencies USAF (Department of the Air Force)	$3,817,947	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Innovative Defense Technologies, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$3,814,662	0.1%	Rank history: #35 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
77	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$3,803,494	0.1%	Rank history: #42 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
78	Secretary of State Connecticut Through University of Connecticut Top agencies USAF (Department of the Air Force)	$3,788,400	0.1%	Rank history: not on the FY2022–FY2025 lists; down 66 since FY2020.
79	Sierra Nevada Company, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$3,722,048	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; down 46 since FY2020.
80	Zone 5 Technologies, LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) USSOCOM (United States Special Operations Command)	$3,502,596	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Seacorp, LLC Top agencies Navy (Department of the Navy)	$3,426,344	0.1%	Rank history: not on the FY2022 list, #71 in FY2023, #55 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
82	Rise8 Inc. Top agencies USAF (Department of the Air Force)	$3,312,643	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Viasat Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$3,284,820	0.1%	Rank history: not on the FY2022–FY2023 lists, #97 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
84	Battelle Memorial Institute Top agencies Army (Department of the Army)	$3,239,950	0.1%	Rank history: not on the FY2022–FY2024 lists and #86 in FY2025; new, not ranked in FY2020.
85	Frontier Performance Polymers Corp Top agencies Navy (Department of the Navy)	$3,199,811	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Black River Systems Company, Inc. Top agencies USAF (Department of the Air Force)	$3,135,483	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Owl Cyber Defense Solutions LLC Through Trident Systems LLC Top agencies USAF (Department of the Air Force) DISA (Defense Information Systems Agency) Army (Department of the Army)	$3,047,500	0.1%	Rank history: #88 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
88	R Cubed Engineering LLC Top agencies Navy (Department of the Navy)	$3,034,195	0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
89	Kudu Dynamics LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$3,019,475	0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
90	Frequency Electronics Inc. Top agencies Navy (Department of the Navy)	$3,000,000	0.1%	Rank history: #94 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
91	Aptima Inc. Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$2,946,550	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Georgia TECH Research Corp Through Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$2,872,574	0.1%	Rank history: #28 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
93	Physical Sciences Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency)	$2,872,115	0.1%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; down 58 since FY2020.
94	Logisys Technical Services Inc. Top agencies Army (Department of the Army)	$2,811,700	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Genesis Dimensions LLC Top agencies Army (Department of the Army)	$2,802,916	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Attollo Engineering, LLC Top agencies USAF (Department of the Air Force)	$2,771,648	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Spaceworks Enterprises Inc. Through Generation Orbit Launch Services, Inc. Top agencies USAF (Department of the Air Force)	$2,626,761	0.1%	Rank history: not on the FY2022–FY2025 lists; down 80 since FY2020.
98	Standardaero Aviation Holdings, Inc. Through Standard Aero (San Antonio) Inc. Top agencies USAF (Department of the Air Force)	$2,583,293	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Raven Industries, Inc. Through Aerostar International, LLC Top agencies OSD (Office of the Secretary of Defense)	$2,575,519	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	The Perduco Group, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,424,767	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 432 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 $3.6 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 AC13 contractors in FY2021?

1. Lockheed Martin Corporation ($804M), 2. Northrop Grumman Corporation ($452M), 3. RTX Corporation ($307M), 4. The Boeing Company ($245M), 5. Defense Energy Center of Excellence ($166M), 6. Analytic Services Inc. ($133M), 7. Assured Information Security, Inc. ($92M), 8. Jacobs Engineering Group Inc. ($85.3M), 9. BAE Systems PLC ($62.6M), 10. Astrion Group, LLC ($61.2M).

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