Top 100 Contractors in PSC AD: Defense (Other) R&D, FY2025

Name: Top 100 Contractors in PSC AD: Defense (Other) R&D, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 66% of FY2025 PSC AD contract dollars

Contract obligations: $941,551,022 Net of deobligations, by contracts coded PSC AD or a code under it
Contractors: 112 Parent companies with an obligation
Largest contractor: Science Applications International Corporation $126 million, 12.3% 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	Science Applications International Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$126,184,915	12.3%	Rank history: #2 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Lockheed Martin Corporation 14 awardees, including Sikorsky Aircraft Corporation and Lockheed Martin Services, LLC Top agencies USAF (Department of the Air Force) DARPA (Defense Advanced Research Projects Agency) DOT (Department of Transportation)	$106,120,465	10.3%	Rank history: #1 in FY2021, #1 in FY2022, #3 in FY2023 and #4 in FY2024; up 2 since FY2024.
3	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. and Kudu Dynamics LLC Top agencies DOT (Department of Transportation) DTRA (Defense Threat Reduction Agency) DARPA (Defense Advanced Research Projects Agency)	$89,467,977	8.7%	Rank history: #5 in FY2021, #4 in FY2022, #5 in FY2023 and #6 in FY2024; up 3 since FY2024.
4	Seqirus Inc. Top agencies HHS (Department of Health and Human Services)	$78,527,000	7.7%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2024; down 1 since FY2024.
5	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$57,900,587	5.6%	Rank history: #11 in FY2021, #12 in FY2022, #10 in FY2023 and #8 in FY2024; up 3 since FY2024.
6	The National Advanced Mobility Consortium, Inc. Top agencies Army (Department of the Army)	$50,764,535	4.9%	Rank history: #14 in FY2021, #11 in FY2022, #2 in FY2023 and #7 in FY2024; up 1 since FY2024.
7	Advanced Technology International Top agencies Navy (Department of the Navy)	$48,220,296	4.7%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; up 5 since FY2024.
8	The Aerospace Corporation Top agencies NASA (National Aeronautics and Space Administration)	$44,985,152	4.4%	Rank history: #20 in FY2021, #19 in FY2022, #12 in FY2023 and #10 in FY2024; up 2 since FY2024.
9	Two Six Labs, LLC Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense) USCYBERCOM (Department of Defense Cyber Command)	$41,700,487	4.1%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2024; up 28 since FY2024.
10	RTX Corporation 15 awardees, including Raytheon Company, RTX BBN Technologies, Inc. and Advanced Technology International Top agencies WHS (DOD Washington Headquarters Service) Navy (Department of the Navy) USAF (Department of the Air Force)	$28,850,450	2.8%	Rank history: #4 in FY2021, #6 in FY2022, #6 in FY2023 and #13 in FY2024; up 3 since FY2024.
11	KBR Wyle Services LLC 3 awardees, including Dependable Global Solutions, LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force)	$23,222,725	2.3%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; up 8 since FY2024.
12	Radiance Technologies, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$21,357,815	2.1%	Rank history: #9 in FY2021, #9 in FY2022, #9 in FY2023 and #9 in FY2024; down 3 since FY2024.
13	Accelint Intelligent Systems, LLC Top agencies Army (Department of the Army)	$19,868,410	1.9%	Rank history: not on the FY2021 list, #79 in FY2022, #88 in FY2023 and #18 in FY2024; up 5 since FY2024.
14	BAE Systems 6 awardees, including BAE Systems Information and Electronic Systems Integration Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$19,654,145	1.9%	Rank history: #45 in FY2021, #27 in FY2022, #41 in FY2023 and #74 in FY2024; up 60 since FY2024.
15	Genesic Semiconductor Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$16,650,309	1.6%	Rank history: not on the FY2021–FY2024 lists; new.
16	L3Harris Technologies, Inc. 11 awardees, including Fisica Applied Technologies, Inc., L3Harris Technologies Integrated Systems L.P. and L-3 Applied Technologies, Inc. Top agencies DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$16,219,153	1.6%	Rank history: #13 in FY2021, #15 in FY2022, #21 in FY2023 and #25 in FY2024; up 9 since FY2024.
17	Northrop Grumman Corporation 17 awardees, including Northrop Grumman Systems Corporation and Alliant Techsystems Operations LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$15,301,209	1.5%	Rank history: #10 in FY2021, #23 in FY2022, #17 in FY2023 and #5 in FY2024; down 12 since FY2024.
18	University of Dayton Top agencies USAF (Department of the Air Force) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$14,762,996	1.4%	Rank history: #34 in FY2021, #40 in FY2022, #24 in FY2023 and #21 in FY2024; up 3 since FY2024.
19	National Security Technology Accelerator Inc. Top agencies OSD (Office of the Secretary of Defense) WHS (DOD Washington Headquarters Service) Navy (Department of the Navy)	$11,706,753	1.1%	Rank history: #6 in FY2021, #7 in FY2022, #16 in FY2023 and #16 in FY2024; down 3 since FY2024.
20	General Dynamics Corporation 8 awardees, including Applied Physical Sciences Corp and Electric Boat Corporation Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$10,446,281	1.0%	Rank history: #19 in FY2021, #14 in FY2022, #14 in FY2023 and #17 in FY2024; down 3 since FY2024.
21	Sri International Top agencies DARPA (Defense Advanced Research Projects Agency) Navy (Department of the Navy)	$9,581,740	0.9%	Rank history: #21 in FY2021, #31 in FY2022, #25 in FY2023 and #33 in FY2024; up 12 since FY2024.
22	Scientific Research Corporation Top agencies Navy (Department of the Navy)	$8,643,875	0.8%	Rank history: #68 in FY2021, #62 in FY2022, #40 in FY2023 and #31 in FY2024; up 9 since FY2024.
23	The George Mason University Instructional Foundation, Inc. Through George Mason University Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$8,300,142	0.8%	Rank history: not on the FY2021–FY2023 lists and #58 in FY2024; up 35 since FY2024.
24	Bascom Hunter Technologies, Inc. Top agencies Navy (Department of the Navy)	$7,391,339	0.7%	Rank history: not on the FY2021–FY2024 lists; up 100 since FY2024.
25	The Research Foundation for the State University of New York Top agencies DARPA (Defense Advanced Research Projects Agency)	$6,119,299	0.6%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2023 and not on the FY2024 list; returned.
26	Assured Information Security, Inc. Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$5,844,891	0.6%	Rank history: #31 in FY2021, #60 in FY2022, #33 in FY2023 and #29 in FY2024; up 3 since FY2024.
27	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies OSD (Office of the Secretary of Defense) DOT (Department of Transportation) DOS (Department of State)	$5,801,817	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
28	Fortem Technologies Inc Top agencies Army (Department of the Army)	$5,792,324	0.6%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #57 in FY2024; up 29 since FY2024.
29	Systems & Technology Research LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$5,416,650	0.5%	Rank history: #25 in FY2021, #29 in FY2022, #28 in FY2023 and #23 in FY2024; down 6 since FY2024.
30	Next Tier Concepts Inc Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$5,414,672	0.5%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and #78 in FY2024; up 48 since FY2024.
31	Torch Technologies Inc. Top agencies USAF (Department of the Air Force)	$4,663,818	0.5%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #50 in FY2024; up 19 since FY2024.
32	Teamstaff Inc. Through Dlh, LLC Top agencies Navy (Department of the Navy)	$4,326,314	0.4%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2024; up 8 since FY2024.
33	Orbital Insight, Inc. Top agencies USAF (Department of the Air Force)	$2,946,500	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
34	Washington Metropolitan Area Transit Authority Top agencies DOT (Department of Transportation)	$2,425,396	0.2%	Rank history: not on the FY2021–FY2023 lists and #90 in FY2024; up 56 since FY2024.
35	CACI International Inc. 3 awardees, including LGS Innovations LLC Top agencies USAF (Department of the Air Force)	$2,348,239	0.2%	Rank history: #28 in FY2021, #21 in FY2022, #18 in FY2023 and #63 in FY2024; up 28 since FY2024.
36	Tactical Engineering & Analysis, Inc. Top agencies Navy (Department of the Navy)	$2,023,951	0.2%	Rank history: #62 in FY2021, #67 in FY2022, #42 in FY2023 and #24 in FY2024; down 12 since FY2024.
37	Par Technology Corporation Through Par Government Systems Corporation Top agencies USAF (Department of the Air Force)	$2,008,906	0.2%	Rank history: #63 in FY2021, #57 in FY2022, #52 in FY2023 and #26 in FY2024; down 11 since FY2024.
38	American Systems Corporation Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$1,900,182	0.2%	Rank history: not on the FY2021 list, #80 in FY2022, #59 in FY2023 and #48 in FY2024; up 10 since FY2024.
39	Serco-Ips Corporation Top agencies Navy (Department of the Navy)	$1,777,545	0.2%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; up 29 since FY2024.
40	Sussex Rural Electric Cooperative Top agencies Army (Department of the Army)	$1,768,449	0.2%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; up 13 since FY2024.
41	Nalas Engineering Services Inc Top agencies Army (Department of the Army)	$1,615,520	0.2%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023 and #51 in FY2024; up 10 since FY2024.
42	The Boeing Company 4 awardees, including HRL Laboratories, LLC Top agencies Navy (Department of the Navy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$1,535,584	0.1%	Rank history: #29 in FY2021, #32 in FY2022, #67 in FY2023 and #2 in FY2024; down 40 since FY2024.
43	Battelle Memorial Institute Top agencies Army (Department of the Army) Navy (Department of the Navy)	$1,509,540	0.1%	Rank history: #59 in FY2021, #42 in FY2022, #45 in FY2023 and #43 in FY2024; unchanged since FY2024.
44	Qinetiq Inc. Top agencies USAF (Department of the Air Force)	$1,468,662	0.1%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 52 since FY2024.
45	University of Pittsburgh - of the Commonwealth System of Higher Education Top agencies DARPA (Defense Advanced Research Projects Agency)	$1,401,239	0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2024; up 28 since FY2024.
46	Rocky Mountain Scientific Laboratory, LLC Top agencies Army (Department of the Army)	$1,385,868	0.1%	Rank history: not on the FY2021–FY2024 lists; up 186 since FY2024.
47	Asgn Incorporated Through ECS Federal, LLC Top agencies OSD (Office of the Secretary of Defense)	$1,343,339	0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; down 20 since FY2024.
48	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) Navy (Department of the Navy)	$1,314,161	0.1%	Rank history: #16 in FY2021, #18 in FY2022, #13 in FY2023 and #28 in FY2024; down 20 since FY2024.
49	Tecolote Research, Inc. Top agencies USAF (Department of the Air Force)	$1,285,652	0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and #47 in FY2024; down 2 since FY2024.
50	Black River Systems Company, Inc. Top agencies USAF (Department of the Air Force)	$1,262,538	0.1%	Rank history: #39 in FY2021, #25 in FY2022, #37 in FY2023 and #93 in FY2024; up 43 since FY2024.
51	Apogee Research LLC Top agencies USAF (Department of the Air Force)	$1,189,903	0.1%	Rank history: #71 in FY2021, #52 in FY2022, #34 in FY2023 and #30 in FY2024; down 21 since FY2024.
52	Arctos Technology Solutions, LLC Top agencies USAF (Department of the Air Force)	$979,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
53	Red Wire Technologies LLC Top agencies DTRA (Defense Threat Reduction Agency)	$895,925	0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; up 28 since FY2024.
54	Arete Associates Top agencies Navy (Department of the Navy)	$877,130	0.1%	Rank history: not on the FY2021 list, #46 in FY2022, #48 in FY2023 and #82 in FY2024; up 28 since FY2024.
55	Spaceworks Enterprises Inc. Top agencies USAF (Department of the Air Force)	$867,425	0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 37 since FY2024.
56	Huntington Ingalls Industries, Inc. 2 awardees, including HII Mission Technologies Corp and HII Unmanned Systems, Inc. Top agencies DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$847,771	0.1%	Rank history: not on the FY2021–FY2024 lists; up 47 since FY2024.
57	The Pennsylvania State University Top agencies Navy (Department of the Navy)	$750,000	0.1%	Rank history: #12 in FY2021, #17 in FY2022, #15 in FY2023 and #84 in FY2024; up 27 since FY2024.
58	Pacmar Technologies LLC Top agencies Navy (Department of the Navy)	$734,914	0.1%	Rank history: not on the FY2021–FY2024 lists; up 85 since FY2024.
59	Synergene Therapeutics Inc Top agencies DTRA (Defense Threat Reduction Agency)	$706,655	0.1%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 26 since FY2024.
60	Expedition Technology, LLC Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$681,079	0.1%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2024; up 10 since FY2024.
61	Technologist Inc. Top agencies USAF (Department of the Air Force)	$638,091	0.1%	Rank history: not on the FY2021–FY2024 lists; up 56 since FY2024.
62	Nalej Corp Top agencies USAF (Department of the Air Force)	$533,868	0.1%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; down 18 since FY2024.
63	General Electric Company 3 awardees, including GE Aviation Systems LLC Top agencies DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$523,873	0.1%	Rank history: #61 in FY2021, #49 in FY2022, #23 in FY2023 and not on the FY2024 list; up 111 since FY2024.
64	Noresco, LLC Top agencies DOT (Department of Transportation)	$502,089	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 92 since FY2024.
65	Kairos Autonomi Inc. Top agencies Navy (Department of the Navy)	$485,860	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 134 since FY2024.
66	Tangram Flex Inc. Top agencies USAF (Department of the Air Force)	$482,439	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.
67	Intel Federal LLC Top agencies Army (Department of the Army)	$446,503	<0.1%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 12 since FY2024.
68	Galois, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$400,000	<0.1%	Rank history: #58 in FY2021, #63 in FY2022, #39 in FY2023 and not on the FY2024 list; up 36 since FY2024.
69	Subuas LLC Top agencies Navy (Department of the Navy)	$400,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
70	Mayo Clinic Top agencies Navy (Department of the Navy)	$384,067	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
71	Kitware Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$377,885	<0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and #60 in FY2024; down 11 since FY2024.
72	Hy-Tek Manufacturing Co., Inc. Top agencies Navy (Department of the Navy)	$364,605	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 91 since FY2024.
73	Nanoracks, LLC Top agencies OSD (Office of the Secretary of Defense)	$357,502	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Southwest Research Institute Top agencies DTRA (Defense Threat Reduction Agency)	$355,768	<0.1%	Rank history: #50 in FY2021, #44 in FY2022, #26 in FY2023 and #32 in FY2024; down 42 since FY2024.
75	NTS Technical Systems LLC Top agencies Army (Department of the Army)	$323,979	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
76	Riverside Research Institute Top agencies Navy (Department of the Navy)	$277,229	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 101 since FY2024.
77	Agnitron Technology Inc. Top agencies Navy (Department of the Navy)	$276,598	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 151 since FY2024.
78	Accurate Energetic Systems, LLC Top agencies Army (Department of the Army)	$265,618	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
79	Venesco LLC Top agencies Navy (Department of the Navy)	$253,867	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 105 since FY2024.
80	Irflex Corp Top agencies Navy (Department of the Navy)	$250,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
81	Materials Research & Design Inc. Top agencies Navy (Department of the Navy)	$249,854	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 112 since FY2024.
82	Ministry of Defence Top agencies DTRA (Defense Threat Reduction Agency)	$244,818	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
83	Vadum Inc. Top agencies Navy (Department of the Navy)	$199,765	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 32 since FY2024.
84	Quanterion Solutions Inc Top agencies USAF (Department of the Air Force)	$165,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 117 since FY2024.
85	Concordant LLC Top agencies DOT (Department of Transportation)	$161,197	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 45 since FY2024.
86	Fuse Integration, Inc. Top agencies Navy (Department of the Navy)	$139,844	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 94 since FY2024.
87	Arctic Slope Regional Corporation Through AS and D, LLC Top agencies USAF (Department of the Air Force)	$110,235	<0.1%	Rank history: #75 in FY2021 and not on the FY2022–FY2024 lists; returned.
88	Rochester Institute of Technology Top agencies Army (Department of the Army)	$100,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Metron Incorporated Top agencies Navy (Department of the Navy)	$99,946	<0.1%	Rank history: #54 in FY2021, #50 in FY2022, #46 in FY2023 and #91 in FY2024; up 2 since FY2024.
90	Instituto Presbiteriano Mackenzie Top agencies NASA (National Aeronautics and Space Administration)	$78,365	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 78 since FY2024.
91	Innovital Systems Inc. Top agencies Navy (Department of the Navy)	$76,295	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
92	Hughes Network Systems LLC Top agencies Army (Department of the Army)	$65,371	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
93	Safe Inc. Top agencies Navy (Department of the Navy)	$61,088	<0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and not on the FY2024 list; returned.
94	Silverblock Systems Inc. Top agencies Navy (Department of the Navy)	$52,122	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
95	Connectec Company, Inc. Top agencies Army (Department of the Army)	$49,123	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
96	Fibertek, Inc. Top agencies Army (Department of the Army)	$41,662	<0.1%	Rank history: #87 in FY2021, #87 in FY2022 and not on the FY2023–FY2024 lists; returned.
97	The Keyw Corporation Top agencies USAF (Department of the Air Force)	$37,500	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	88Solutions Corp Top agencies USAF (Department of the Air Force)	$36,012	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	DCS Corporation Top agencies USAF (Department of the Air Force)	$19,177	<0.1%	Rank history: #47 in FY2021, #53 in FY2022, #31 in FY2023 and #34 in FY2024; down 65 since FY2024.
100	Propel, LLC Top agencies Navy (Department of the Navy)	$18,736	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.

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100 of 112 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC AD

Code	Net obligations	Largest contractor
AD93 R&D – Defense Other: Other (Advanced Development)	$296,424,078	Lockheed Martin Corporation
AD92 R&D – Defense Other: Other (Applied Research/Exploratory Development)	$91,112,092	Genesic Semiconductor 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 $1.03 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 AD contractors in FY2025?

1. Science Applications International Corporation ($126M), 2. Lockheed Martin Corporation ($106M), 3. Leidos Holdings, Inc. ($89.5M), 4. Seqirus Inc. ($78.5M), 5. Applied Research Associates, Inc. ($57.9M), 6. The National Advanced Mobility Consortium, Inc. ($50.8M), 7. Advanced Technology International ($48.2M), 8. The Aerospace Corporation ($45M), 9. Two Six Labs, LLC ($41.7M), 10. RTX Corporation ($28.9M).

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