Top 100 Defense Threat Reduction Agency Contractors, FY2023

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) 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$187,800,101	10.9%	Rank history: #3 in FY2021, #2 in FY2022, #1 in FY2024 and #1 in FY2025; up 1 since FY2022.
2	Honeywell International Inc. Through National Technology & Engineering Solutions of Sandia, LLC Top NAICS codes 561210 Facilities Support Services	$150,182,752	8.7%	Rank history: not on the FY2021 list, #3 in FY2022, #2 in FY2024 and not on the FY2025 list; up 1 since FY2022.
3	CACI International Inc. 2 awardees, including Caci Nss, LLC 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)	$139,656,611	8.1%	Rank history: #1 in FY2021, #1 in FY2022, #4 in FY2024 and #5 in FY2025; down 2 since FY2022.
4	Amentum Services, Inc. 2 awardees, including URS Federal Services International, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$139,083,114	8.0%	Rank history: #8 in FY2021, #6 in FY2022, #13 in FY2024 and not on the FY2025 list; up 2 since FY2022.
5	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)	$101,976,302	5.9%	Rank history: #2 in FY2021, #4 in FY2022, #3 in FY2024 and #3 in FY2025; down 1 since FY2022.
6	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. Top NAICS codes 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) 541512 Computer Systems Design Services	$72,841,510	4.2%	Rank history: #4 in FY2021, #8 in FY2022, #6 in FY2024 and #2 in FY2025; up 2 since FY2022.
7	Teksynap Corporation Top NAICS codes 541513 Computer Facilities Management Services 541519 Other Computer Related Services	$59,944,981	3.5%	Rank history: #6 in FY2021, #7 in FY2022, #8 in FY2024 and #13 in FY2025; unchanged since FY2022.
8	Lawrence Livermore National Security, LLC	$49,436,852	2.9%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #8 in FY2025; new.
9	Parsons Corporation 4 awardees, including Parsons Government Services Inc., Parsons Government Services International Inc. and Blackhorse, A Parsons 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)	$42,874,770	2.5%	Rank history: #25 in FY2021, #16 in FY2022, #9 in FY2024 and #11 in FY2025; up 7 since FY2022.
10	Culmen International, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$41,948,776	2.4%	Rank history: #22 in FY2021, #17 in FY2022, #21 in FY2024 and #20 in FY2025; up 7 since FY2022.
11	Systems Planning and Analysis, Inc. 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	$40,056,690	2.3%	Rank history: #21 in FY2021, #10 in FY2022, #14 in FY2024 and #9 in FY2025; down 1 since FY2022.
12	Black & Veatch Special Projects Corp. 2 awardees Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$34,991,282	2.0%	Rank history: #5 in FY2021, #20 in FY2022, #24 in FY2024 and #30 in FY2025; up 8 since FY2022.
13	Noblis, Inc. Top NAICS codes 541330 Engineering Services	$34,195,147	2.0%	Rank history: #20 in FY2021, #5 in FY2022, #7 in FY2024 and #6 in FY2025; down 8 since FY2022.
14	Nakupuna Solutions, LLC Top NAICS codes 541330 Engineering Services	$33,712,966	1.9%	Rank history: not on the FY2021 list, #11 in FY2022, #11 in FY2024 and #36 in FY2025; down 3 since FY2022.
15	Triad National Security LLC Top NAICS codes 561210 Facilities Support Services	$32,914,172	1.9%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2024 and #4 in FY2025; new.
16	Arservices, Limited Top NAICS codes 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services 493110 General Warehousing and Storage	$30,219,624	1.7%	Rank history: #17 in FY2021, #12 in FY2022, #16 in FY2024 and #12 in FY2025; down 4 since FY2022.
17	Southwest Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541330 Engineering Services	$28,474,727	1.6%	Rank history: #12 in FY2021, #15 in FY2022, #15 in FY2024 and #16 in FY2025; down 2 since FY2022.
18	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	$28,227,771	1.6%	Rank history: #13 in FY2021, #19 in FY2022, #49 in FY2024 and not on the FY2025 list; up 1 since FY2022.
19	General Dynamics Corporation 5 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 541330 Engineering Services	$26,804,012	1.5%	Rank history: #15 in FY2021, #18 in FY2022, #12 in FY2024 and #7 in FY2025; down 1 since FY2022.
20	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) 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541990 All Other Professional, Scientific, and Technical Services	$18,190,298	1.1%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2024 and not on the FY2025 list; up 113 since FY2022.
21	L3Harris Technologies, Inc. Through Fisica Applied Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$14,890,165	0.9%	Rank history: #9 in FY2021, #14 in FY2022, #22 in FY2024 and #17 in FY2025; down 7 since FY2022.
22	Savantage Financial Services, Inc. Top NAICS codes 541519 Other Computer Related Services	$13,228,715	0.8%	Rank history: #18 in FY2021, #21 in FY2022, #20 in FY2024 and #19 in FY2025; down 1 since FY2022.
23	Jacobs Engineering Group Inc. 2 awardees, including Ch2M Hill, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$12,733,071	0.7%	Rank history: #14 in FY2021, #66 in FY2022 and not on the FY2024–FY2025 lists; up 43 since FY2022.
24	Premier Technology, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$9,776,215	0.6%	Rank history: #19 in FY2021, #29 in FY2022, #23 in FY2024 and #26 in FY2025; up 5 since FY2022.
25	Kapili Services, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$9,176,794	0.5%	Rank history: not on the FY2021 list, #25 in FY2022, #39 in FY2024 and #34 in FY2025; unchanged since FY2022.
26	National Strategic Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$9,070,578	0.5%	Rank history: #33 in FY2021, #31 in FY2022, #50 in FY2024 and #61 in FY2025; up 5 since FY2022.
27	Science Applications International Corporation Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$8,067,466	0.5%	Rank history: #7 in FY2021, #24 in FY2022, #28 in FY2024 and #18 in FY2025; down 3 since FY2022.
28	Akima Data Management LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$7,646,033	0.4%	Rank history: #61 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
29	Consolidated Nuclear Security, LLC Top NAICS codes 561210 Facilities Support Services	$7,592,256	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
30	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	$6,695,859	0.4%	Rank history: #47 in FY2021, #34 in FY2022, #38 in FY2024 and not on the FY2025 list; up 4 since FY2022.
31	Rmgs Inc. Top NAICS codes 541330 Engineering Services	$5,893,866	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #95 in FY2025; new.
32	The Pennsylvania State University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,875,250	0.3%	Rank history: not on the FY2021 list, #61 in FY2022, #19 in FY2024 and #21 in FY2025; up 29 since FY2022.
33	PAE Government Services Inc. 2 awardees, including PAE National Security Solutions LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$5,749,785	0.3%	Rank history: #10 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
34	Evergreen Contractors LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$5,422,741	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
35	International Aids Vaccine Initiative Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,287,820	0.3%	Rank history: #16 in FY2021, #32 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
36	Dell Federal Systems L.P. 2 awardees, including Dell Marketing L.P. Top NAICS codes 541519 Other Computer Related Services 511210 Software Publishers 334111 Electronic Computer Manufacturing	$5,212,530	0.3%	Rank history: #39 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
37	RTX Corporation 2 awardees, including Raytheon Company and Everfox LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 511210 Software Publishers 541990 All Other Professional, Scientific, and Technical Services	$5,192,474	0.3%	Rank history: #23 in FY2021, #26 in FY2022, #18 in FY2024 and #45 in FY2025; down 11 since FY2022.
38	Akima Facilities Operations LLC Top NAICS codes 561612 Security Guards and Patrol Services 561210 Facilities Support Services	$5,061,771	0.3%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #38 in FY2025; new.
39	Fortem Technologies Inc	$4,850,000	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 81 since FY2022.
40	K2 Group Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$4,829,100	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	HP Enterprise Services LLC 2 awardees, including Peraton Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$4,601,899	0.3%	Rank history: #28 in FY2021, #23 in FY2022, #92 in FY2024 and #92 in FY2025; down 18 since FY2022.
42	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)	$4,580,011	0.3%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2024 and not on the FY2025 list; up 61 since FY2022.
43	Natsionalny Yaderny Tsentr Respubliki Kazakhstan, GP Top NAICS codes 541330 Engineering Services	$4,392,503	0.3%	Rank history: #58 in FY2021, #47 in FY2022, #29 in FY2024 and not on the FY2025 list; up 4 since FY2022.
44	Alion Science and Technology Corporation 3 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	$4,345,900	0.3%	Rank history: #54 in FY2021, not on the FY2022 list, #88 in FY2024 and not on the FY2025 list; up 97 since FY2022.
45	Chimera Enterprises International Incorporated Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$4,340,404	0.3%	Rank history: #44 in FY2021, #37 in FY2022, #51 in FY2024 and not on the FY2025 list; down 8 since FY2022.
46	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)	$4,118,943	0.2%	Rank history: #30 in FY2021, #42 in FY2022, #73 in FY2024 and not on the FY2025 list; down 4 since FY2022.
47	Sehlke Consulting LLC Top NAICS codes 541511 Custom Computer Programming Services	$3,963,696	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
48	Rymarc Construction Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance 238990 All Other Specialty Trade Contractors	$3,709,362	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #88 in FY2025; up 200 since FY2022.
49	Sealing Technologies LLC Top NAICS codes 541519 Other Computer Related Services	$3,660,210	0.2%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and not on the FY2025 list; new.
50	Broadleaf, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$3,600,749	0.2%	Rank history: #53 in FY2021, #44 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
51	JFL Consulting, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$3,567,223	0.2%	Rank history: #51 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
52	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 541511 Custom Computer Programming Services	$3,543,456	0.2%	Rank history: #41 in FY2021, #35 in FY2022, #81 in FY2024 and not on the FY2025 list; down 17 since FY2022.
53	State of California Controllers Office Through University of California, San Diego Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,518,021	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 70 since FY2022.
54	Novetta Solutions, LLC Through Accenture Federal Services LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,337,633	0.2%	Rank history: #66 in FY2021, #55 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
55	D7, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$3,266,781	0.2%	Rank history: not on the FY2021 list, #46 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
56	BNC Corp. Top NAICS codes 334516 Analytical Laboratory Instrument Manufacturing 334517 Irradiation Apparatus Manufacturing	$3,220,290	0.2%	Rank history: #86 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 95 since FY2022.
57	Kyrus Tech, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,080,000	0.2%	Rank history: #67 in FY2021, #68 in FY2022, #33 in FY2024 and #27 in FY2025; up 11 since FY2022.
58	Chenega It Enterprise Services, LLC Top NAICS codes 541613 Marketing Consulting Services	$2,988,776	0.2%	Rank history: #52 in FY2021, #43 in FY2022, #37 in FY2024 and not on the FY2025 list; down 15 since FY2022.
59	Mahidol Oxford Tropical Medicine Research Unit Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$2,982,419	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 93 since FY2022.
60	Environmental Systems Research Institute, Inc. Top NAICS codes 511210 Software Publishers	$2,980,262	0.2%	Rank history: #55 in FY2021, #49 in FY2022, #58 in FY2024 and #44 in FY2025; down 11 since FY2022.
61	Indesign LLC Top NAICS codes 541330 Engineering Services	$2,824,846	0.2%	Rank history: #59 in FY2021, #63 in FY2022, #74 in FY2024 and #67 in FY2025; up 2 since FY2022.
62	Koniag, Inc. Through Kadiak LLC Top NAICS codes 541614 Process, Physical Distribution, and Logistics Consulting Services 541511 Custom Computer Programming Services	$2,555,845	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #52 in FY2025; new.
63	Armis Biopharma, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,355,853	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2024 and not on the FY2025 list; new.
64	Mantech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,324,107	0.1%	Rank history: #48 in FY2021, #40 in FY2022, #96 in FY2024 and not on the FY2025 list; down 24 since FY2022.
65	Katmai Management Services LLC Top NAICS codes 561210 Facilities Support Services	$2,212,213	0.1%	Rank history: not on the FY2021 list, #60 in FY2022, #70 in FY2024 and #60 in FY2025; down 5 since FY2022.
66	Dynasil Corporation of America Through Radiation Monitoring Devices, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,199,683	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Northern Arizona University Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,178,865	0.1%	Rank history: not on the FY2021 list, #39 in FY2022, #78 in FY2024 and #62 in FY2025; down 28 since FY2022.
68	Stemboard LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,169,410	0.1%	Rank history: not on the FY2021 list, #70 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
69	Northrop Grumman Corporation 3 awardees, including Northrop Grumman Systems Corporation and Northrop Grumman Innovation Systems, Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$2,165,263	0.1%	Rank history: #26 in FY2021, #82 in FY2022 and not on the FY2024–FY2025 lists; up 13 since FY2022.
70	Fifth Gait Technologies, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,100,000	0.1%	Rank history: not on the FY2021 list, #62 in FY2022, not on the FY2024 list and #80 in FY2025; down 8 since FY2022.
71	Owlstone Medical Limited	$2,088,788	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #69 in FY2025; new.
72	Kearney & Company, P.C. Top NAICS codes 541211 Offices of Certified Public Accountants	$2,019,891	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and not on the FY2025 list; new.
73	Nana Regional Corporation Inc Through Affigent, LLC Top NAICS codes 541519 Other Computer Related Services	$2,004,054	0.1%	Rank history: #63 in FY2021, #83 in FY2022 and not on the FY2024–FY2025 lists; up 10 since FY2022.
74	Mission Support & Test Services LLC Top NAICS codes 561210 Facilities Support Services	$2,001,105	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Detect-Ion LLC	$1,941,972	0.1%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2024 and #98 in FY2025; new.
76	Kbr, Inc. Through KBR Wyle Services, LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$1,867,163	0.1%	Rank history: #34 in FY2021, #56 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
77	Appddictionstudio Limited Liability Company Top NAICS codes 541511 Custom Computer Programming Services	$1,800,000	0.1%	Rank history: not on the FY2021 list, #84 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
78	Obsidian Solutions Group LLC Top NAICS codes 541330 Engineering Services	$1,756,882	0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2024 and #89 in FY2025; new.
79	Inferlink Corp Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,746,194	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	C3.Ai, Inc.	$1,715,000	0.1%	Rank history: #64 in FY2021, #51 in FY2022 and not on the FY2024–FY2025 lists; down 29 since FY2022.
81	Red Wire Technologies LLC	$1,709,287	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	Pate Construction Co., Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$1,704,000	0.1%	Rank history: #42 in FY2021, not on the FY2022 list, #30 in FY2024 and not on the FY2025 list; up 83 since FY2022.
83	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)	$1,547,366	0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #95 in FY2024 and not on the FY2025 list; down 30 since FY2022.
84	Integral Global Consulting LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$1,545,331	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2024 and not on the FY2025 list; new.
85	Creare 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)	$1,448,347	0.1%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and not on the FY2025 list; new.
86	Atlantic Council of the United States, Inc. (The) Top NAICS codes 541720 Research and Development in the Social Sciences and Humanities	$1,447,677	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 15 since FY2022.
87	Aeris LLC 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)	$1,405,952	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #77 in FY2024 and #42 in FY2025; up 5 since FY2022.
88	Vitrivax, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,393,618	0.1%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2024 and #48 in FY2025; new.
89	Ausgar Technologies, Inc. Top NAICS codes 541330 Engineering Services	$1,384,324	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #58 in FY2025; up 59 since FY2022.
90	Heico Aerospace Corporat 2 awardees, including Sensor Technology Engineering LLC and Research Electronics International, L.L.C. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 334519 Other Measuring and Controlling Device Manufacturing	$1,353,851	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 53 since FY2022.
91	Synergene Therapeutics Inc. Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$1,335,092	0.1%	Rank history: #68 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 34 since FY2022.
92	EP Analytics, Inc.. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,332,695	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 65 since FY2022.
93	EA Engineering, Science, and Technology, Inc., PBC Top NAICS codes 562910 Remediation Services	$1,299,496	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Medical Technology Enterprise Consortium	$1,246,776	0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2024 and #63 in FY2025; new.
95	University of Oxford Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$1,230,671	0.1%	Rank history: #36 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 33 since FY2022.
96	Nevada State Veterans Home Through Board of Regents of Nevada System of Higher Education 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)	$1,172,585	0.1%	Rank history: #62 in FY2021, #87 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
97	Organizational Development Resource Group, LLC Top NAICS codes 611430 Professional and Management Development Training	$1,144,716	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 53 since FY2022.
98	Center for Strategic & International Studies Inc. 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)	$1,127,378	0.1%	Rank history: not on the FY2021 list, #58 in FY2022 and not on the FY2024–FY2025 lists; down 40 since FY2022.
99	Centeio Associates Inc Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$1,121,479	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
100	Point Rock Solutions, LLC Top NAICS codes 561499 All Other Business Support Services	$1,111,481	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 17 since FY2022.

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 $1.73 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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