Top 100 Defense Threat Reduction Agency Contractors, FY2024

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	$200,112,087	12.0%	Rank history: #3 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2025; unchanged since FY2023.
2	Honeywell International Inc. 2 awardees, including National Technology & Engineering Solutions of Sandia, LLC and Honeywell Federal Manufacturing & Technologies, LLC Top NAICS codes 561210 Facilities Support Services	$150,339,559	9.0%	Rank history: not on the FY2021 list, #3 in FY2022, #2 in FY2023 and not on the FY2025 list; unchanged since FY2023.
3	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541512 Computer Systems Design Services	$115,311,816	6.9%	Rank history: #2 in FY2021, #4 in FY2022, #5 in FY2023 and #3 in FY2025; up 2 since FY2023.
4	CACI International Inc. 3 awardees, including Caci Nss, LLC and Caci, Inc. - Federal Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services 517110 Wired Telecommunications Carriers	$106,329,586	6.4%	Rank history: #1 in FY2021, #1 in FY2022, #3 in FY2023 and #5 in FY2025; down 1 since FY2023.
5	Triad National Security LLC Top NAICS codes 561210 Facilities Support Services	$87,193,503	5.2%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and #4 in FY2025; up 10 since FY2023.
6	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541512 Computer Systems Design Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$76,724,284	4.6%	Rank history: #4 in FY2021, #8 in FY2022, #6 in FY2023 and #2 in FY2025; unchanged since FY2023.
7	Noblis, Inc. Top NAICS codes 541330 Engineering Services	$66,735,450	4.0%	Rank history: #20 in FY2021, #5 in FY2022, #13 in FY2023 and #6 in FY2025; up 6 since FY2023.
8	Teksynap Corporation Top NAICS codes 541513 Computer Facilities Management Services	$60,647,173	3.6%	Rank history: #6 in FY2021, #7 in FY2022, #7 in FY2023 and #13 in FY2025; down 1 since FY2023.
9	Parsons Corporation 4 awardees, including Parsons Government Services Inc., Parsons Government Services International Inc. and Xator LLC Top NAICS codes 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$44,480,329	2.7%	Rank history: #25 in FY2021, #16 in FY2022, #9 in FY2023 and #11 in FY2025; unchanged since FY2023.
10	Caci Technologies LLC 2 awardees, including Caci Nss, LLC and Caci, Inc. - Federal Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$43,752,888	2.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
11	Nakupuna Solutions, LLC Top NAICS codes 541330 Engineering Services	$32,987,227	2.0%	Rank history: not on the FY2021 list, #11 in FY2022, #14 in FY2023 and #36 in FY2025; up 3 since FY2023.
12	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 334111 Electronic Computer Manufacturing	$32,608,373	2.0%	Rank history: #15 in FY2021, #18 in FY2022, #19 in FY2023 and #7 in FY2025; up 7 since FY2023.
13	Amentum Services, Inc. 4 awardees, including URS Federal Services International, Inc. and PAE National Security Solutions LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$30,224,366	1.8%	Rank history: #8 in FY2021, #6 in FY2022, #4 in FY2023 and not on the FY2025 list; down 9 since FY2023.
14	Systems Planning and Analysis, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$28,278,383	1.7%	Rank history: #21 in FY2021, #10 in FY2022, #11 in FY2023 and #9 in FY2025; down 3 since FY2023.
15	Southwest Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$27,501,949	1.6%	Rank history: #12 in FY2021, #15 in FY2022, #17 in FY2023 and #16 in FY2025; up 2 since FY2023.
16	Arservices, Limited Top NAICS codes 541330 Engineering Services 493110 General Warehousing and Storage 541690 Other Scientific and Technical Consulting Services	$27,262,144	1.6%	Rank history: #17 in FY2021, #12 in FY2022, #16 in FY2023 and #12 in FY2025; unchanged since FY2023.
17	Valiant Global Defense Services Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$26,091,254	1.6%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
18	RTX Corporation 2 awardees, including Raytheon Company and Everfox LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 511210 Software Publishers	$20,299,491	1.2%	Rank history: #23 in FY2021, #26 in FY2022, #37 in FY2023 and #45 in FY2025; up 19 since FY2023.
19	The Pennsylvania State University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$17,208,201	1.0%	Rank history: not on the FY2021 list, #61 in FY2022, #32 in FY2023 and #21 in FY2025; up 13 since FY2023.
20	Savantage Financial Services, Inc. Top NAICS codes 541519 Other Computer Related Services	$13,387,621	0.8%	Rank history: #18 in FY2021, #21 in FY2022, #22 in FY2023 and #19 in FY2025; up 2 since FY2023.
21	Culmen International, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$13,354,304	0.8%	Rank history: #22 in FY2021, #17 in FY2022, #10 in FY2023 and #20 in FY2025; down 11 since FY2023.
22	L3Harris Technologies, Inc. 2 awardees, including Fisica Applied Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$12,939,456	0.8%	Rank history: #9 in FY2021, #14 in FY2022, #21 in FY2023 and #17 in FY2025; down 1 since FY2023.
23	Premier Technology, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$10,606,309	0.6%	Rank history: #19 in FY2021, #29 in FY2022, #24 in FY2023 and #26 in FY2025; up 1 since FY2023.
24	Black & Veatch Special Projects Corp. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$10,557,049	0.6%	Rank history: #5 in FY2021, #20 in FY2022, #12 in FY2023 and #30 in FY2025; down 12 since FY2023.
25	Ch2M Hill, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$10,530,674	0.6%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2025; new.
26	Parsons Government Services Inc. Top NAICS codes 541330 Engineering Services	$9,801,103	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
27	The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$9,402,738	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
28	Science Applications International Corporation 3 awardees Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$8,612,684	0.5%	Rank history: #7 in FY2021, #24 in FY2022, #27 in FY2023 and #18 in FY2025; down 1 since FY2023.
29	Natsionalny Yaderny Tsentr Respubliki Kazakhstan, GP Top NAICS codes 541330 Engineering Services	$8,490,776	0.5%	Rank history: #58 in FY2021, #47 in FY2022, #43 in FY2023 and not on the FY2025 list; up 14 since FY2023.
30	Pate Construction Co., Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$8,284,576	0.5%	Rank history: #42 in FY2021, not on the FY2022 list, #82 in FY2023 and not on the FY2025 list; up 52 since FY2023.
31	K2 Group, Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$8,220,200	0.5%	Rank history: #32 in FY2021, #27 in FY2022, not on the FY2023 list and #29 in FY2025; returned.
32	Primmune Therapeutics, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$7,845,610	0.5%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2025; new.
33	Kyrus Tech, LLC 2 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$6,833,673	0.4%	Rank history: #67 in FY2021, #68 in FY2022, #57 in FY2023 and #27 in FY2025; up 24 since FY2023.
34	Nana Regional Corporation Inc. 2 awardees, including Akima Data Management LLC and Affigent, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541519 Other Computer Related Services	$6,048,317	0.4%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
35	Dell Technologies Inc. 2 awardees, including Dell Marketing L.P. and Dell Federal Systems L.P Top NAICS codes 511210 Software Publishers 513210 Software Publishers 541519 Other Computer Related Services	$5,794,651	0.3%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
36	L3HARRIS Aviation Products Inc Through Fisica Applied Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,765,847	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
37	Chenega It Enterprise Services, LLC Top NAICS codes 541613 Marketing Consulting Services	$5,532,549	0.3%	Rank history: #52 in FY2021, #43 in FY2022, #58 in FY2023 and not on the FY2025 list; up 21 since FY2023.
38	University of Alaska System Through University of Alaska Fairbanks Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 611310 Colleges, Universities, and Professional Schools	$5,395,959	0.3%	Rank history: #47 in FY2021, #34 in FY2022, #30 in FY2023 and not on the FY2025 list; down 8 since FY2023.
39	Kapili Services, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$5,267,505	0.3%	Rank history: not on the FY2021 list, #25 in FY2022, #25 in FY2023 and #34 in FY2025; down 14 since FY2023.
40	Huntington Ingalls Industries, Inc. 2 awardees, including HII Mission Technologies Corp Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 511210 Software Publishers	$5,204,056	0.3%	Rank history: #29 in FY2021, #41 in FY2022, not on the FY2023 list and #37 in FY2025; returned.
41	Akima Facilities Operations LLC Top NAICS codes 561210 Facilities Support Services 561612 Security Guards and Patrol Services	$4,960,529	0.3%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023 and #38 in FY2025; down 3 since FY2023.
42	Ahtna Global LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$4,900,000	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
43	C3.AI Inc.	$4,850,000	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
44	Sealing Technologies LLC Top NAICS codes 541519 Other Computer Related Services	$4,614,434	0.3%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2023 and not on the FY2025 list; up 5 since FY2023.
45	Vitrivax, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$4,464,711	0.3%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023 and #48 in FY2025; up 43 since FY2023.
46	Ministry of Defence Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$3,844,952	0.2%	Rank history: #50 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 70 since FY2023.
47	Teledyne Technologies Incorporated 2 awardees, including Teledyne Flir Defense, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541711 Research and Development in Biotechnology	$3,660,445	0.2%	Rank history: #96 in FY2021, #57 in FY2022, not on the FY2023 list and #68 in FY2025; up 135 since FY2023.
48	Peraton Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$3,575,260	0.2%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2025; new.
49	Nova Global Supply and Services LLC Through Valiant Global Defense Services Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$3,574,317	0.2%	Rank history: #13 in FY2021, #19 in FY2022, #18 in FY2023 and not on the FY2025 list; down 31 since FY2023.
50	National Strategic Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,513,842	0.2%	Rank history: #33 in FY2021, #31 in FY2022, #26 in FY2023 and #61 in FY2025; down 24 since FY2023.
51	Chimera Enterprises International Incorporated Top NAICS codes 541330 Engineering Services	$3,263,250	0.2%	Rank history: #44 in FY2021, #37 in FY2022, #45 in FY2023 and not on the FY2025 list; down 6 since FY2023.
52	Arctic Slope Regional Corporation Through Broadleaf, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$3,154,636	0.2%	Rank history: not on the FY2021–FY2023 lists and #54 in FY2025; new.
53	Carnegie-Mellon University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,112,366	0.2%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2025; new.
54	Amentum Holdings, Inc. 2 awardees, including URS Federal Services International, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$3,059,411	0.2%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2025; new.
55	Detect-Ion LLC	$3,037,621	0.2%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #98 in FY2025; up 20 since FY2023.
56	Genecapture, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,002,565	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
57	Medical Technology Enterprise Consortium	$2,997,507	0.2%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #63 in FY2025; up 37 since FY2023.
58	Environmental Systems Research Institute, Inc. Top NAICS codes 511210 Software Publishers	$2,980,262	0.2%	Rank history: #55 in FY2021, #49 in FY2022, #60 in FY2023 and #44 in FY2025; up 2 since FY2023.
59	Kadiak LLC Top NAICS codes 541511 Custom Computer Programming Services 541614 Process, Physical Distribution, and Logistics Consulting Services	$2,782,947	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
60	Appddictionstudio Limited Liability Company Top NAICS codes 541511 Custom Computer Programming Services	$2,756,774	0.2%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2025; new.
61	Creare LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,598,590	0.2%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2023 and not on the FY2025 list; up 24 since FY2023.
62	Advanced Technology International	$2,522,420	0.2%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2025; new.
63	Mantech Advanced Systems International, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,500,000	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
64	Aleut Management Services, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,428,091	0.1%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2025; new.
65	Armis Biopharma, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,403,468	0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and not on the FY2025 list; down 2 since FY2023.
66	The Domenix Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,324,223	0.1%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2025; new.
67	Knowmadics Inc Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,182,617	0.1%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2025; new.
68	ICR Inc Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,178,726	0.1%	Rank history: not on the FY2021 list, #74 in FY2022, not on the FY2023 list and #70 in FY2025; up 104 since FY2023.
69	Capesym Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,164,005	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 145 since FY2023.
70	Katmai Management Services LLC Top NAICS codes 561210 Facilities Support Services	$2,115,480	0.1%	Rank history: not on the FY2021 list, #60 in FY2022, #65 in FY2023 and #60 in FY2025; down 5 since FY2023.
71	The 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) 611310 Colleges, Universities, and Professional Schools 541990 All Other Professional, Scientific, and Technical Services	$2,085,743	0.1%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2023 and not on the FY2025 list; down 51 since FY2023.
72	IST Research, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,082,472	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
73	Koninklijke Philips N.V. Through Philips North America LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,065,518	0.1%	Rank history: #30 in FY2021, #42 in FY2022, #46 in FY2023 and not on the FY2025 list; down 27 since FY2023.
74	Indesign LLC Top NAICS codes 541330 Engineering Services	$2,063,000	0.1%	Rank history: #59 in FY2021, #63 in FY2022, #61 in FY2023 and #67 in FY2025; down 13 since FY2023.
75	Microsoft Corporation Top NAICS codes 541512 Computer Systems Design Services	$2,000,841	0.1%	Rank history: #37 in FY2021, #38 in FY2022, not on the FY2023 list and #55 in FY2025; up 111 since FY2023.
76	Kearney & Company, P.C. Top NAICS codes 541211 Offices of Certified Public Accountants	$1,976,128	0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023 and not on the FY2025 list; down 4 since FY2023.
77	Aeris LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$1,917,193	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #87 in FY2023 and #42 in FY2025; up 10 since FY2023.
78	Northern Arizona University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,897,918	0.1%	Rank history: not on the FY2021 list, #39 in FY2022, #67 in FY2023 and #62 in FY2025; down 11 since FY2023.
79	D7, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$1,852,166	0.1%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
80	Tenacious Solutions LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,822,946	0.1%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2025; up 35 since FY2023.
81	The Charles Stark Draper Laboratory, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541512 Computer Systems Design Services	$1,817,913	0.1%	Rank history: #41 in FY2021, #35 in FY2022, #52 in FY2023 and not on the FY2025 list; down 29 since FY2023.
82	Red Wire Technologies LLC	$1,796,937	0.1%	Rank history: #82 in FY2021, #72 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
83	Chulalongkorn University Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$1,726,358	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
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)	$1,709,458	0.1%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2025; up 82 since FY2023.
85	Rampart Technologies Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,687,390	0.1%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2025; up 42 since FY2023.
86	Achuti LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,660,760	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	Flir Systems Inc. Through Teledyne Flir Defense, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,650,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and not on the FY2025 list; down 45 since FY2023.
88	Alion Science and Technology Corporation Through HII Mission Technologies Corp Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$1,643,238	0.1%	Rank history: #54 in FY2021, not on the FY2022 list, #44 in FY2023 and not on the FY2025 list; down 44 since FY2023.
89	Dynamic Systems Inc. Top NAICS codes 334111 Electronic Computer Manufacturing	$1,621,328	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
90	Badvr Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,574,086	0.1%	Rank history: not on the FY2021–FY2023 lists and #87 in FY2025; up 47 since FY2023.
91	Synergene Therapeutics Inc Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$1,573,584	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; 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)	$1,498,499	0.1%	Rank history: #28 in FY2021, #23 in FY2022, #41 in FY2023 and #92 in FY2025; down 51 since FY2023.
93	Integration Technologies Group, Inc. Top NAICS codes 334112 Computer Storage Device Manufacturing	$1,443,877	0.1%	Rank history: #78 in FY2021, #75 in FY2022, not on the FY2023 list and #100 in FY2025; up 40 since FY2023.
94	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services	$1,414,597	0.1%	Rank history: #88 in FY2021, #76 in FY2022, not on the FY2023 list and #33 in FY2025; up 80 since FY2023.
95	The Administrators of Tulane Educational Fund Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$1,413,409	0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #83 in FY2023 and not on the FY2025 list; down 12 since FY2023.
96	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)	$1,409,753	0.1%	Rank history: #48 in FY2021, #40 in FY2022, #64 in FY2023 and not on the FY2025 list; down 32 since FY2023.
97	Integral Global Consulting LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$1,377,677	0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and not on the FY2025 list; down 13 since FY2023.
98	Combustion Research & Flow Technology Inc. Top NAICS codes 541713 Research and Development in Nanotechnology 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,349,753	0.1%	Rank history: #99 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 37 since FY2023.
99	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$1,340,193	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 81 since FY2023.
100	Obsidian Solutions Group LLC Top NAICS codes 541330 Engineering Services	$1,329,331	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #89 in FY2025; down 22 since FY2023.

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 $1.67 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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.

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