Top 51 Contractors in PSC B541: Defense Studies, FY2025

Name: Top 51 Contractors in PSC B541: Defense Studies, FY2025
Creator: GovTribe

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

The top 10 won 95% of FY2025 PSC B541 contract dollars

Contract obligations: $586,928,429 Net of deobligations, by contracts coded PSC B541
Contractors: 52 Parent companies with an obligation
Largest contractor: Parsons Corporation $197 million, 32.2% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 51 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Parsons Corporation Through Parsons Government Services Inc. Top agencies USAF (Department of the Air Force)	$197,172,783	32.2%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023 and #3 in FY2024; up 2 since FY2024.
2	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$150,502,712	24.6%	Rank history: not on the FY2021–FY2024 lists; new.
3	The CNA Corporation Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$104,835,822	17.1%	Rank history: #4 in FY2021, #4 in FY2022, #4 in FY2023 and #5 in FY2024; up 2 since FY2024.
4	The Rand Corporation Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$93,573,624	15.3%	Rank history: #3 in FY2021, #2 in FY2022, #3 in FY2023 and #4 in FY2024; unchanged since FY2024.
5	Lockheed Martin Corporation Top agencies USAF (Department of the Air Force)	$14,824,574	2.4%	Rank history: #6 in FY2021, #5 in FY2022, #7 in FY2023 and #6 in FY2024; up 1 since FY2024.
6	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies Navy (Department of the Navy)	$9,143,893	1.5%	Rank history: #7 in FY2021, #6 in FY2022, #6 in FY2023 and #7 in FY2024; up 1 since FY2024.
7	Hart Technologies, Inc. Top agencies Navy (Department of the Navy)	$7,358,080	1.2%	Rank history: #10 in FY2021, #11 in FY2022, #11 in FY2023 and #10 in FY2024; up 3 since FY2024.
8	Leidos Holdings, Inc. Through Leidos, Inc. Top agencies Army (Department of the Army)	$2,650,000	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
9	Analytic Services Inc. Top agencies OSD (Office of the Secretary of Defense)	$1,843,465	0.3%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2024; up 5 since FY2024.
10	Scientific Research Corporation Top agencies OSD (Office of the Secretary of Defense)	$1,475,391	0.2%	Rank history: #8 in FY2021, #14 in FY2022, #10 in FY2023 and #11 in FY2024; up 1 since FY2024.
11	National Academy of Sciences Top agencies OSD (Office of the Secretary of Defense)	$1,318,757	0.2%	Rank history: #17 in FY2021, #23 in FY2022 and not on the FY2023–FY2024 lists; returned.
12	Fedtec LLC Top agencies Navy (Department of the Navy)	$848,328	0.1%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023 and #17 in FY2024; up 5 since FY2024.
13	Applied Mathematics, Inc. Top agencies Navy (Department of the Navy)	$499,200	0.1%	Rank history: #28 in FY2021, #25 in FY2022, #20 in FY2023 and #20 in FY2024; up 7 since FY2024.
14	Voreas Laboratories, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$479,932	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
15	Federal Foundry LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$450,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
16	Steth X Microsystems Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$409,145	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
17	Alta Resource Technologies, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$392,388	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
18	A2 Labs, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$361,792	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
19	Cubic Defense Applications Inc. Through Cubic Secure Communications, LLC Top agencies USAF (Department of the Air Force)	$359,923	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
20	The Boeing Company 2 awardees Top agencies Navy (Department of the Navy)	$345,421	0.1%	Rank history: #29 in FY2021, #19 in FY2022, #15 in FY2023 and #19 in FY2024; down 1 since FY2024.
21	Rise Energy, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$345,285	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
22	Peraton Labs Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$329,504	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
23	Torchlight Solutions LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$320,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
24	Waveryde Instruments, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$319,525	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
25	Northstar Earth & Space Systems, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$318,938	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
26	Phantom Neuro, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$315,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
27	Carnegie-Mellon University Top agencies DARPA (Defense Advanced Research Projects Agency)	$315,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
28	Seco Bio, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$310,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
29	Air Protein, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$310,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
30	Common Ground Solutions LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$310,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
31	Reach Power, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$310,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
32	Undaunted Development LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$310,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
33	Singletto Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$309,999	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
34	ADA Technologies, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$309,999	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
35	Aptima Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$309,972	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
36	Trans Astronautica Corporation Top agencies DARPA (Defense Advanced Research Projects Agency)	$309,933	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
37	Maglev Aero Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$305,996	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
38	Aeris Water Technologies, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$303,125	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
39	Mathematical Systems & Solutions, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$301,037	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
40	Polaris Quantum Biotech Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$300,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
41	Redshred, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$299,570	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
42	The Regents of the University of California Top agencies DARPA (Defense Advanced Research Projects Agency)	$250,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
43	Duality Technologies Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$250,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
44	Leonardo S.p.A. Through DRS Naval Power Systems Inc. Top agencies Navy (Department of the Navy)	$200,772	<0.1%	Rank history: #36 in FY2021, #26 in FY2022, not on the FY2023 list and #34 in FY2024; down 10 since FY2024.
45	The Ottery Group, Inc. Top agencies DOE (Department of Energy)	$198,854	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
46	Center for Strategic and Budgetary Assessments Top agencies Navy (Department of the Navy)	$132,761	<0.1%	Rank history: #31 in FY2021, #28 in FY2022, #24 in FY2023 and #30 in FY2024; down 16 since FY2024.
47	The Potomac Institute for Policy Studies Top agencies Navy (Department of the Navy)	$115,324	<0.1%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2024; down 21 since FY2024.
48	Miami University Top agencies OSD (Office of the Secretary of Defense)	$83,323	<0.1%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2024; down 17 since FY2024.
49	Formalloy Technologies, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency)	$49,998	<0.1%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; down 22 since FY2024.
50	Center for Strategic & International Studies Inc. Top agencies MDA (DOD Missile Defense Agency)	$34,270	<0.1%	Rank history: #33 in FY2021, not on the FY2022–FY2023 lists and #36 in FY2024; down 14 since FY2024.
51	Zekiah Technologies Inc. Top agencies Navy (Department of the Navy)	$18,137	<0.1%	Rank history: #22 in FY2021, #24 in FY2022 and not on the FY2023–FY2024 lists; returned.

Show 26 more

51 of 52 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 $612 million 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 B541 contractors in FY2025?

1. Parsons Corporation ($197M), 2. The Johns Hopkins University Applied Physics Laboratory LLC ($151M), 3. The CNA Corporation ($105M), 4. The Rand Corporation ($93.6M), 5. Lockheed Martin Corporation ($14.8M), 6. Booz Allen Hamilton Holding Corporation ($9.14M), 7. Hart Technologies, Inc. ($7.36M), 8. Leidos Holdings, Inc. ($2.65M), 9. Analytic Services Inc. ($1.84M), 10. Scientific Research Corporation ($1.48M).

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