Top 100 Defense Threat Reduction Agency Contractors, FY2025

Name: Top 100 Defense Threat Reduction Agency Contractors, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 52% of FY2025 Defense Threat Reduction Agency contract dollars

Contract obligations: $1,295,526,836 Net of deobligations, by the Defense Threat Reduction Agency and its offices
Contractors: 280 Parent companies with an obligation
Largest contractor: Applied Research Associates, Inc. $187 million, 13.4% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Applied Research Associates, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services	$186,568,761	13.4%	Rank history: #3 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. Top NAICS codes 541512 Computer Systems Design Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$98,815,986	7.1%	Rank history: #4 in FY2021, #8 in FY2022, #6 in FY2023 and #6 in FY2024; up 4 since FY2024.
3	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541512 Computer Systems Design Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$95,192,209	6.8%	Rank history: #2 in FY2021, #4 in FY2022, #5 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	Triad National Security LLC Top NAICS codes 561210 Facilities Support Services	$69,918,830	5.0%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and #5 in FY2024; up 1 since FY2024.
5	CACI International Inc. 2 awardees, including Caci Nss, LLC Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services	$66,456,012	4.8%	Rank history: #1 in FY2021, #1 in FY2022, #3 in FY2023 and #4 in FY2024; down 1 since FY2024.
6	Noblis, Inc. Top NAICS codes 541330 Engineering Services	$54,272,338	3.9%	Rank history: #20 in FY2021, #5 in FY2022, #13 in FY2023 and #7 in FY2024; up 1 since FY2024.
7	General Dynamics Corporation 4 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top NAICS codes 541512 Computer Systems Design Services 541990 All Other Professional, Scientific, and Technical Services 541519 Other Computer Related Services	$39,167,853	2.8%	Rank history: #15 in FY2021, #18 in FY2022, #19 in FY2023 and #12 in FY2024; up 5 since FY2024.
8	Lawrence Livermore National Security, LLC	$39,025,631	2.8%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2023 and not on the FY2024 list; returned.
9	Systems Planning and Analysis, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$38,389,160	2.8%	Rank history: #21 in FY2021, #10 in FY2022, #11 in FY2023 and #14 in FY2024; up 5 since FY2024.
10	Valiant Global Defense Services Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$33,603,982	2.4%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; up 7 since FY2024.
11	Parsons Corporation 4 awardees, including Parsons Government Services Inc. and Xator LLC Top NAICS codes 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$33,293,549	2.4%	Rank history: #25 in FY2021, #16 in FY2022, #9 in FY2023 and #9 in FY2024; down 2 since FY2024.
12	Arservices, Limited Top NAICS codes 541330 Engineering Services 541690 Other Scientific and Technical Consulting Services	$32,742,970	2.4%	Rank history: #17 in FY2021, #12 in FY2022, #16 in FY2023 and #16 in FY2024; up 4 since FY2024.
13	Teksynap Corporation Top NAICS codes 541513 Computer Facilities Management Services	$30,451,798	2.2%	Rank history: #6 in FY2021, #7 in FY2022, #7 in FY2023 and #8 in FY2024; down 5 since FY2024.
14	Amentum Holdings, Inc. 4 awardees, including URS Federal Services International, Inc. and Amentum Services, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$30,010,837	2.2%	Rank history: not on the FY2021–FY2023 lists and #54 in FY2024; up 40 since FY2024.
15	Techtrans International Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$26,245,038	1.9%	Rank history: not on the FY2021–FY2024 lists; new.
16	Southwest Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$22,416,577	1.6%	Rank history: #12 in FY2021, #15 in FY2022, #17 in FY2023 and #15 in FY2024; down 1 since FY2024.
17	L3Harris Technologies, Inc. 2 awardees, including Fisica Applied Technologies, Inc. and L-3 Applied Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$20,950,027	1.5%	Rank history: #9 in FY2021, #14 in FY2022, #21 in FY2023 and #22 in FY2024; up 5 since FY2024.
18	Science Applications International Corporation Top NAICS codes 541330 Engineering Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541990 All Other Professional, Scientific, and Technical Services	$18,888,689	1.4%	Rank history: #7 in FY2021, #24 in FY2022, #27 in FY2023 and #28 in FY2024; up 10 since FY2024.
19	Savantage Financial Services, Inc. Top NAICS codes 541519 Other Computer Related Services	$15,916,152	1.1%	Rank history: #18 in FY2021, #21 in FY2022, #22 in FY2023 and #20 in FY2024; up 1 since FY2024.
20	Culmen International, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$15,453,861	1.1%	Rank history: #22 in FY2021, #17 in FY2022, #10 in FY2023 and #21 in FY2024; up 1 since FY2024.
21	The Pennsylvania State University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$12,733,293	0.9%	Rank history: not on the FY2021 list, #61 in FY2022, #32 in FY2023 and #19 in FY2024; down 2 since FY2024.
22	Nana Regional Corporation Inc. 3 awardees, including Akima Data Management LLC and Affigent, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$12,318,536	0.9%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2024; up 12 since FY2024.
23	Dell Technologies Inc. 2 awardees, including Dell Federal Systems L.P and Dell Marketing L.P. Top NAICS codes 511210 Software Publishers 513210 Software Publishers	$12,276,548	0.9%	Rank history: not on the FY2021–FY2023 lists and #35 in FY2024; up 12 since FY2024.
24	Respublikanskoe Gosudarstvennoe Predpriyatie NA Prave Khozyaistvennogo Vedeniya Through Respublikanskoe Gosudarstvennoe Predpriyatie NA Prave Khozyaistvennogo Vedeniya Natsionalnyi Yadernyi Tsentr Respubliki Kazakhstan Ministerstva Energetiki Respubliki Kazakhstan Top NAICS codes 541330 Engineering Services	$12,180,354	0.9%	Rank history: not on the FY2021–FY2024 lists; new.
25	Nakupuna Prime, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$11,225,203	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
26	Premier Technology, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$10,255,986	0.7%	Rank history: #19 in FY2021, #29 in FY2022, #24 in FY2023 and #23 in FY2024; down 3 since FY2024.
27	Kyrus Tech, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$10,176,050	0.7%	Rank history: #67 in FY2021, #68 in FY2022, #57 in FY2023 and #33 in FY2024; up 6 since FY2024.
28	Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541990 All Other Professional, Scientific, and Technical Services 611310 Colleges, Universities, and Professional Schools	$9,942,184	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
29	K2 Group, Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$9,096,653	0.7%	Rank history: #32 in FY2021, #27 in FY2022, not on the FY2023 list and #31 in FY2024; up 2 since FY2024.
30	Black & Veatch Special Projects Corp. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$7,327,084	0.5%	Rank history: #5 in FY2021, #20 in FY2022, #12 in FY2023 and #24 in FY2024; down 6 since FY2024.
31	University of Alaska Fairbanks Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 611310 Colleges, Universities, and Professional Schools	$7,318,372	0.5%	Rank history: not on the FY2021–FY2024 lists; up 196 since FY2024.
32	Chimera Enterprises International Incorporated Top NAICS codes 541330 Engineering Services	$7,182,878	0.5%	Rank history: not on the FY2021–FY2024 lists; up 150 since FY2024.
33	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 513210 Software Publishers 541519 Other Computer Related Services	$7,139,827	0.5%	Rank history: #88 in FY2021, #76 in FY2022, not on the FY2023 list and #94 in FY2024; up 61 since FY2024.
34	Kapili Services, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$7,082,300	0.5%	Rank history: not on the FY2021 list, #25 in FY2022, #25 in FY2023 and #39 in FY2024; up 5 since FY2024.
35	V2X, Inc. Through V2X Aerospace LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$6,961,187	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
36	Nakupuna Solutions, LLC Top NAICS codes 541330 Engineering Services	$6,361,411	0.5%	Rank history: not on the FY2021 list, #11 in FY2022, #14 in FY2023 and #11 in FY2024; down 25 since FY2024.
37	Huntington Ingalls Industries, Inc. Through HII Mission Technologies Corp Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 511210 Software Publishers	$5,590,199	0.4%	Rank history: #29 in FY2021, #41 in FY2022, not on the FY2023 list and #40 in FY2024; up 3 since FY2024.
38	Akima Facilities Operations LLC Top NAICS codes 561210 Facilities Support Services 561612 Security Guards and Patrol Services	$5,187,848	0.4%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023 and #41 in FY2024; up 3 since FY2024.
39	Advanced Technology International	$4,847,282	0.3%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; up 23 since FY2024.
40	Knowmadics Inc	$4,748,451	0.3%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2024; up 27 since FY2024.
41	Tenacious Solutions LLC Top NAICS codes 541519 Other Computer Related Services 541611 Administrative Management and General Management Consulting Services	$4,337,926	0.3%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; up 39 since FY2024.
42	Aeris LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$4,030,968	0.3%	Rank history: not on the FY2021 list, #92 in FY2022, #87 in FY2023 and #77 in FY2024; up 35 since FY2024.
43	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,815,027	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
44	Environmental Systems Research Institute, Inc. Top NAICS codes 511210 Software Publishers	$3,785,294	0.3%	Rank history: #55 in FY2021, #49 in FY2022, #60 in FY2023 and #58 in FY2024; up 14 since FY2024.
45	RTX Corporation 3 awardees, including RTX BBN Technologies, Inc. and Raytheon Company Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$3,776,294	0.3%	Rank history: #23 in FY2021, #26 in FY2022, #37 in FY2023 and #18 in FY2024; down 27 since FY2024.
46	Peraton Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$3,729,140	0.3%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 2 since FY2024.
47	D7, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$3,697,047	0.3%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 32 since FY2024.
48	Vitrivax, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,242,468	0.2%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023 and #45 in FY2024; down 3 since FY2024.
49	Ritz Construction Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$3,046,094	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
50	Ministry of Defence Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,033,543	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
51	FCN, Inc. Top NAICS codes 541519 Other Computer Related Services	$2,911,845	0.2%	Rank history: not on the FY2021–FY2024 lists; up 216 since FY2024.
52	Koniag, Inc. Through Kadiak LLC Top NAICS codes 541511 Custom Computer Programming Services 541614 Process, Physical Distribution, and Logistics Consulting Services	$2,835,385	0.2%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and not on the FY2024 list; up 185 since FY2024.
53	Primmune Therapeutics, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,782,285	0.2%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; down 21 since FY2024.
54	Arctic Slope Regional Corporation Through Broadleaf, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,562,359	0.2%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2024; down 2 since FY2024.
55	Microsoft Corporation Top NAICS codes 541512 Computer Systems Design Services	$2,480,851	0.2%	Rank history: #37 in FY2021, #38 in FY2022, not on the FY2023 list and #75 in FY2024; up 20 since FY2024.
56	University of California, San Diego Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,461,821	0.2%	Rank history: not on the FY2021–FY2024 lists; up 110 since FY2024.
57	The Domenix Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,388,483	0.2%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 9 since FY2024.
58	Ausgar Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,383,926	0.2%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023 and not on the FY2024 list; returned.
59	Parabon Nanolabs, Inc. Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,349,912	0.2%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2023–FY2024 lists; returned.
60	Katmai Management Services LLC Top NAICS codes 561210 Facilities Support Services	$2,320,147	0.2%	Rank history: not on the FY2021 list, #60 in FY2022, #65 in FY2023 and #70 in FY2024; up 10 since FY2024.
61	National Strategic Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,251,042	0.2%	Rank history: #33 in FY2021, #31 in FY2022, #26 in FY2023 and #50 in FY2024; down 11 since FY2024.
62	Northern Arizona University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,178,890	0.2%	Rank history: not on the FY2021 list, #39 in FY2022, #67 in FY2023 and #78 in FY2024; up 16 since FY2024.
63	Medical Technology Enterprise Consortium	$2,096,980	0.2%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #57 in FY2024; down 6 since FY2024.
64	Everfox LLC Top NAICS codes 511210 Software Publishers	$2,079,682	0.1%	Rank history: not on the FY2021–FY2024 lists; up 155 since FY2024.
65	E.f. Kearney, Limited Through Kearney & Company, P.C. Top NAICS codes 541211 Offices of Certified Public Accountants	$2,021,259	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
66	Amazon Web Services, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$2,006,940	0.1%	Rank history: not on the FY2021–FY2024 lists; up 160 since FY2024.
67	Indesign LLC Top NAICS codes 541330 Engineering Services	$1,999,944	0.1%	Rank history: #59 in FY2021, #63 in FY2022, #61 in FY2023 and #74 in FY2024; up 7 since FY2024.
68	Teledyne Technologies Incorporated Through Teledyne Flir Defense, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,986,207	0.1%	Rank history: #96 in FY2021, #57 in FY2022, not on the FY2023 list and #47 in FY2024; down 21 since FY2024.
69	Owlstone Medical Limited	$1,950,600	0.1%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023 and not on the FY2024 list; returned.
70	ICR Inc Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,937,998	0.1%	Rank history: not on the FY2021 list, #74 in FY2022, not on the FY2023 list and #68 in FY2024; down 2 since FY2024.
71	Carnegie-Mellon University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,850,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; down 18 since FY2024.
72	Aleut Management Services, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,809,642	0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; down 8 since FY2024.
73	Group W Inc. Top NAICS codes 541511 Custom Computer Programming Services	$1,781,903	0.1%	Rank history: not on the FY2021–FY2024 lists; up 59 since FY2024.
74	Evans Berger Scientific Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,734,204	0.1%	Rank history: not on the FY2021–FY2024 lists; up 32 since FY2024.
75	Rampart Technologies Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,722,175	0.1%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 10 since FY2024.
76	Xerox Corporation Top NAICS codes 333316 Photographic and Photocopying Equipment Manufacturing	$1,685,871	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
77	Dynamic Systems Inc. Top NAICS codes 334111 Electronic Computer Manufacturing	$1,548,695	0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; up 12 since FY2024.
78	Appddictionstudio Limited Liability Company Top NAICS codes 541511 Custom Computer Programming Services	$1,536,779	0.1%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; down 18 since FY2024.
79	Gilded Ibex LLC	$1,531,363	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
80	Fifth Gait Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,478,145	0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #70 in FY2023 and not on the FY2024 list; up 69 since FY2024.
81	Innovative Scientific Solutions Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,397,604	0.1%	Rank history: not on the FY2021–FY2024 lists; up 158 since FY2024.
82	Red Cedar Solutions, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$1,377,309	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
83	Avantus Federal LLC Through Occam's Razor Technologies LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,347,163	0.1%	Rank history: not on the FY2021–FY2024 lists; up 18 since FY2024.
84	Regents of the University of Michigan Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,325,330	0.1%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2024; unchanged since FY2024.
85	H3D Inc Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,323,996	0.1%	Rank history: not on the FY2021–FY2024 lists; up 159 since FY2024.
86	Shield Analysis Technology LLC Top NAICS codes 541810 Advertising Agencies 541410 Interior Design Services	$1,299,306	0.1%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
87	Badvr Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,287,967	0.1%	Rank history: not on the FY2021–FY2023 lists and #90 in FY2024; up 3 since FY2024.
88	Rymarc Construction Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction 811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance 236220 Commercial and Institutional Building Construction	$1,278,542	0.1%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2023 and not on the FY2024 list; up 84 since FY2024.
89	Obsidian Solutions Group LLC Top NAICS codes 541330 Engineering Services	$1,274,111	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #100 in FY2024; up 11 since FY2024.
90	University of Southern California Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,250,974	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
91	Trace3 Government, LLC Top NAICS codes 334111 Electronic Computer Manufacturing	$1,172,251	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
92	HP Enterprise Services LLC Through Peraton Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$1,163,353	0.1%	Rank history: #28 in FY2021, #23 in FY2022, #41 in FY2023 and #92 in FY2024; unchanged since FY2024.
93	Bowhead Enterprise, Science and Technology, LLC Top NAICS codes 561499 All Other Business Support Services	$1,150,081	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
94	Executive Acquisitions & Global Logistic, Engineering Services (Eagles) LLC Top NAICS codes 541511 Custom Computer Programming Services	$1,117,789	0.1%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
95	Rmgs Inc. Top NAICS codes 541330 Engineering Services	$1,109,610	0.1%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023 and not on the FY2024 list; up 38 since FY2024.
96	Saltenna Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,099,980	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	Ch2M Hill, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$1,097,269	0.1%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 72 since FY2024.
98	Detect-Ion LLC	$1,024,121	0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #55 in FY2024; down 43 since FY2024.
99	Adelante Development Center Inc. Top NAICS codes 561720 Janitorial Services	$1,001,764	0.1%	Rank history: not on the FY2021–FY2024 lists; up 30 since FY2024.
100	Integration Technologies Group, Inc. Top NAICS codes 334112 Computer Storage Device Manufacturing	$988,711	0.1%	Rank history: #78 in FY2021, #75 in FY2022, not on the FY2023 list and #93 in FY2024; down 7 since FY2024.

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100 of 280 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 $1.39 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 Defense Threat Reduction Agency contractors in FY2025?

1. Applied Research Associates, Inc. ($187M), 2. Leidos Holdings, Inc. ($98.8M), 3. Booz Allen Hamilton Holding Corporation ($95.2M), 4. Triad National Security LLC ($69.9M), 5. CACI International Inc. ($66.5M), 6. Noblis, Inc. ($54.3M), 7. General Dynamics Corporation ($39.2M), 8. Lawrence Livermore National Security, LLC ($39M), 9. Systems Planning and Analysis, Inc. ($38.4M), 10. Valiant Global Defense Services Inc. ($33.6M).

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