Top 100 Department of Energy Contractors, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	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	$5,713,056,183	12.0%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #2 in FY2024; up 1 since FY2024.
2	Triad National Security LLC Top NAICS codes 561210 Facilities Support Services	$4,819,935,816	10.1%	Rank history: #2 in FY2021, #3 in FY2022, #2 in FY2023 and #1 in FY2024; down 1 since FY2024.
3	Fluor Corporation 5 awardees, including Savannah River Nuclear Solutions LLC, Fluor Marine Propulsion, LLC and Fluor-Bwxt Portsmouth LLC Top NAICS codes 561210 Facilities Support Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 562910 Remediation Services	$4,277,315,669	9.0%	Rank history: #5 in FY2021, #7 in FY2022, #5 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	Battelle Memorial Institute 2 awardees, including Battelle Energy Alliance, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$3,583,518,423	7.5%	Rank history: #3 in FY2021, #4 in FY2022, #9 in FY2023 and #6 in FY2024; up 2 since FY2024.
5	Lawrence Livermore National Security, LLC	$3,218,161,409	6.8%	Rank history: #6 in FY2021, #5 in FY2022, #7 in FY2023 and #5 in FY2024; unchanged since FY2024.
6	Ut-Battelle LLC Top NAICS codes 561210 Facilities Support Services	$2,679,775,141	5.6%	Rank history: #7 in FY2021, #6 in FY2022, #4 in FY2023 and #7 in FY2024; up 1 since FY2024.
7	Consolidated Nuclear Security, LLC Top NAICS codes 561210 Facilities Support Services	$2,517,146,530	5.3%	Rank history: #4 in FY2021, #2 in FY2022, #3 in FY2023 and #4 in FY2024; down 3 since FY2024.
8	Pantexas Deterrence, LLC Top NAICS codes 561210 Facilities Support Services	$1,920,967,340	4.0%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 88 since FY2024.
9	Fermi Forward Discovery Group, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$1,733,790,751	3.6%	Rank history: not on the FY2021–FY2024 lists; new.
10	Amentum Holdings, Inc. 14 awardees, including Central Plateau Cleanup Company, LLC, United Cleanup Oak Ridge LLC and Idaho Environmental Coalition LLC Top NAICS codes 562910 Remediation Services 562211 Hazardous Waste Treatment and Disposal 541330 Engineering Services	$1,673,205,063	3.5%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2024; up 17 since FY2024.
11	The Regents of the University of California Top NAICS codes 611310 Colleges, Universities, and Professional Schools	$1,255,372,786	2.6%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; down 2 since FY2024.
12	Uchicago Argonne, LLC	$1,089,972,483	2.3%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; unchanged since FY2024.
13	Savannah River Mission Completion, LLC Top NAICS codes 562910 Remediation Services	$1,062,510,600	2.2%	Rank history: not on the FY2021 list, #16 in FY2022, #14 in FY2023 and #13 in FY2024; unchanged since FY2024.
14	Bechtel Corp 2 awardees, including Bechtel National, Inc.	$1,057,142,600	2.2%	Rank history: #14 in FY2021, #19 in FY2022, #19 in FY2023 and #14 in FY2024; unchanged since FY2024.
15	Mission Support & Test Services LLC Top NAICS codes 561210 Facilities Support Services	$948,822,690	2.0%	Rank history: #12 in FY2021, #13 in FY2022, #16 in FY2023 and #10 in FY2024; down 5 since FY2024.
16	Alliance for Energy Innovation, LLC Top NAICS codes 541711 Research and Development in Biotechnology	$851,363,380	1.8%	Rank history: #16 in FY2021, #14 in FY2022, #12 in FY2023 and #11 in FY2024; down 5 since FY2024.
17	Brookhaven Science Associates LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$833,727,134	1.8%	Rank history: #15 in FY2021, #12 in FY2022, #15 in FY2023 and #16 in FY2024; down 1 since FY2024.
18	Hanford Tank Waste Operations & Closure, LLC Top NAICS codes 562211 Hazardous Waste Treatment and Disposal	$796,035,008	1.7%	Rank history: not on the FY2021–FY2024 lists; new.
19	The Leland Stanford Junior University Top NAICS codes 611310 Colleges, Universities, and Professional Schools	$686,030,179	1.4%	Rank history: #17 in FY2021, #15 in FY2022, #18 in FY2023 and #17 in FY2024; down 2 since FY2024.
20	Accenture Federal Services LLC Top NAICS codes 541512 Computer Systems Design Services	$456,161,666	1.0%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2024; up 1 since FY2024.
21	Battelle Savannah River Alliance, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$302,244,892	0.6%	Rank history: #22 in FY2021, not on the FY2022–FY2023 lists and #25 in FY2024; up 4 since FY2024.
22	The Trustees of Princeton University Top NAICS codes 611310 Colleges, Universities, and Professional Schools	$223,630,256	0.5%	Rank history: #24 in FY2021, #23 in FY2022, #23 in FY2023 and #31 in FY2024; up 9 since FY2024.
23	Jefferson Science Associates, LLC	$213,622,257	0.4%	Rank history: #23 in FY2021, #21 in FY2022, #22 in FY2023 and #26 in FY2024; up 3 since FY2024.
24	Leidos Holdings, Inc. 7 awardees, including Leidos, Inc. and Hanford Mission Integration Solutions, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 561210 Facilities Support Services 541611 Administrative Management and General Management Consulting Services	$206,738,679	0.4%	Rank history: #20 in FY2021, #27 in FY2022, #24 in FY2023 and #30 in FY2024; up 6 since FY2024.
25	American Centrifuge Operating, LLC Top NAICS codes 221113 Nuclear Electric Power Generation 325180 Other Basic Inorganic Chemical Manufacturing	$198,316,150	0.4%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; up 18 since FY2024.
26	Oak Ridge Associated Universities, Incorporated Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$186,659,931	0.4%	Rank history: #19 in FY2021, #20 in FY2022, #21 in FY2023 and #24 in FY2024; down 2 since FY2024.
27	United Cleanup Oak Ridge LLC Top NAICS codes 562910 Remediation Services	$132,359,640	0.3%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023 and #18 in FY2024; down 9 since FY2024.
28	Arctic Slope Regional Corporation 4 awardees, including RSI Entech, LLC, Asrc Federal Technology Solutions, LLC and Agile Decision Sciences, LLC Top NAICS codes 562910 Remediation Services 541519 Other Computer Related Services 541512 Computer Systems Design Services	$131,297,203	0.3%	Rank history: #42 in FY2021 and not on the FY2022–FY2024 lists; returned.
29	Guidehouse Inc. 4 awardees, including Aptim Federal Services, LLC and Aptim-North Wind Construction JV LLC Top NAICS codes 562910 Remediation Services 541611 Administrative Management and General Management Consulting Services 237110 Water and Sewer Line and Related Structures Construction	$124,498,840	0.3%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2024; up 18 since FY2024.
30	Iowa State University of Science and Technology	$117,469,216	0.2%	Rank history: #34 in FY2021, #33 in FY2022, #27 in FY2023 and #40 in FY2024; up 10 since FY2024.
31	Mele Associates Inc. Top NAICS codes 541330 Engineering Services	$112,069,049	0.2%	Rank history: #48 in FY2021, #36 in FY2022, #34 in FY2023 and #37 in FY2024; up 6 since FY2024.
32	Mid-America Conversion Services, LLC Top NAICS codes 325180 Other Basic Inorganic Chemical Manufacturing	$111,926,378	0.2%	Rank history: #27 in FY2021, #28 in FY2022, #25 in FY2023 and #32 in FY2024; unchanged since FY2024.
33	Hanford Laboratory Management and Integration LLC Top NAICS codes 562910 Remediation Services	$110,020,720	0.2%	Rank history: #47 in FY2021, #31 in FY2022, #31 in FY2023 and #33 in FY2024; unchanged since FY2024.
34	Energy Technology Alliance LLC Top NAICS codes 562910 Remediation Services	$86,714,314	0.2%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2024; unchanged since FY2024.
35	Idaho Environmental Coalition LLC Top NAICS codes 562910 Remediation Services	$84,603,000	0.2%	Rank history: not on the FY2021–FY2023 lists and #36 in FY2024; up 1 since FY2024.
36	North Wind Portage, Inc. Top NAICS codes 562910 Remediation Services	$81,644,344	0.2%	Rank history: not on the FY2021 list, #49 in FY2022, not on the FY2023 list and #67 in FY2024; up 31 since FY2024.
37	Bwxt Enrichment Operations, LLC Top NAICS codes 541330 Engineering Services	$67,000,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
38	BWX Technologies, Inc. 4 awardees, including Nuclear Fuel Services Inc., Bwxt Nuclear Operations Group, Inc. and Bwxt Nog Technologies, Inc. Top NAICS codes 325180 Other Basic Inorganic Chemical Manufacturing 562211 Hazardous Waste Treatment and Disposal	$64,851,239	0.1%	Rank history: not on the FY2021 list, #58 in FY2022, #28 in FY2023 and #38 in FY2024; unchanged since FY2024.
39	Navarro Research and Engineering, Inc. Top NAICS codes 562910 Remediation Services	$59,713,612	0.1%	Rank history: #32 in FY2021, #37 in FY2022, #37 in FY2023 and #41 in FY2024; up 2 since FY2024.
40	Criterion Systems, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$58,173,348	0.1%	Rank history: #31 in FY2021, #38 in FY2022, #39 in FY2023 and #63 in FY2024; up 23 since FY2024.
41	Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC Top NAICS codes 561990 All Other Support Services	$54,068,923	0.1%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2024; up 4 since FY2024.
42	Management Solutions LLC Top NAICS codes 541511 Custom Computer Programming Services 561110 Office Administrative Services 561210 Facilities Support Services	$53,807,739	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and #71 in FY2024; up 29 since FY2024.
43	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541511 Custom Computer Programming Services	$52,739,254	0.1%	Rank history: #50 in FY2021, #45 in FY2022, #40 in FY2023 and #42 in FY2024; down 1 since FY2024.
44	Parsons Corporation 2 awardees, including Parsons Government Services Inc. and Parsons Government Services International Inc. Top NAICS codes 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services	$52,384,731	0.1%	Rank history: #26 in FY2021, #43 in FY2022, #48 in FY2023 and #39 in FY2024; down 5 since FY2024.
45	Minburn Technology Group, LLC Top NAICS codes 541519 Other Computer Related Services	$51,825,614	0.1%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2024; up 7 since FY2024.
46	Techsource, LLC Top NAICS codes 541330 Engineering Services	$49,906,476	0.1%	Rank history: #57 in FY2021, #57 in FY2022, #56 in FY2023 and #53 in FY2024; up 7 since FY2024.
47	Project Enhancement Corporation Top NAICS codes 541620 Environmental Consulting Services	$48,334,742	0.1%	Rank history: #49 in FY2021, #47 in FY2022, #44 in FY2023 and #48 in FY2024; up 1 since FY2024.
48	L3Harris Technologies, Inc. 5 awardees, including Bwxt Ordnance Tennessee, Inc. Top NAICS codes 325180 Other Basic Inorganic Chemical Manufacturing 811210 Electronic and Precision Equipment Repair and Maintenance 541519 Other Computer Related Services	$46,961,038	0.1%	Rank history: not on the FY2021–FY2024 lists; up 306 since FY2024.
49	Keylogic, LLC Top NAICS codes 541330 Engineering Services	$43,503,310	0.1%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; down 5 since FY2024.
50	Diazyme Laboratories Inc. Through General Atomics Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$40,855,794	0.1%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; up 18 since FY2024.
51	West Valley Cleanup Alliance, LLC Top NAICS codes 562910 Remediation Services	$40,643,286	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
52	The Aerospace Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$38,113,188	0.1%	Rank history: #66 in FY2021, #53 in FY2022, #59 in FY2023 and #59 in FY2024; up 7 since FY2024.
53	Archetype III LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$35,165,402	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
54	Innovative Technology Partnerships LLC Top NAICS codes 561210 Facilities Support Services	$33,117,083	0.1%	Rank history: not on the FY2021–FY2024 lists; up 59 since FY2024.
55	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services 335999 All Other Miscellaneous Electrical Equipment and Component Manufacturing 334290 Other Communications Equipment Manufacturing	$33,043,584	0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and #61 in FY2024; up 6 since FY2024.
56	CMA Technology Inc. Top NAICS codes 541519 Other Computer Related Services	$32,278,962	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
57	Qayaq Government Solutions LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction	$32,265,704	0.1%	Rank history: not on the FY2021–FY2024 lists; up 81 since FY2024.
58	Unwin Co Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$31,045,984	0.1%	Rank history: #51 in FY2021, #48 in FY2022, #49 in FY2023 and #54 in FY2024; down 4 since FY2024.
59	Centerra Group, LLC Top NAICS codes 561612 Security Guards and Patrol Services	$30,394,112	0.1%	Rank history: #86 in FY2021, not on the FY2022–FY2023 lists and #69 in FY2024; up 10 since FY2024.
60	KBC Energy Solutions LLC Top NAICS codes 541330 Engineering Services	$29,836,392	0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #46 in FY2024; down 14 since FY2024.
61	Eagle Harbor, LLC Top NAICS codes 611519 Other Technical and Trade Schools	$29,586,940	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
62	Swift & Staley Inc. Top NAICS codes 561210 Facilities Support Services	$28,673,805	0.1%	Rank history: #52 in FY2021, #41 in FY2022, #51 in FY2023 and #55 in FY2024; down 7 since FY2024.
63	Westinghouse Government Services LLC Top NAICS codes 334517 Irradiation Apparatus Manufacturing 493110 General Warehousing and Storage	$28,615,386	0.1%	Rank history: not on the FY2021–FY2024 lists; up 118 since FY2024.
64	Carahsoft Technology Corp Top NAICS codes 541519 Other Computer Related Services 511210 Software Publishers 513210 Software Publishers	$25,477,822	0.1%	Rank history: #58 in FY2021, #32 in FY2022, not on the FY2023 list and #57 in FY2024; down 7 since FY2024.
65	Maximus Federal Services, Inc. Top NAICS codes 541512 Computer Systems Design Services 561422 Telemarketing Bureaus and Other Contact Centers	$25,304,860	0.1%	Rank history: not on the FY2021–FY2024 lists; up 197 since FY2024.
66	KBR Wyle Services LLC Through Dependable Global Solutions, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$24,130,410	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2024; up 11 since FY2024.
67	Regents of the University of California the (4458)	$24,099,156	0.1%	Rank history: #37 in FY2021, #79 in FY2022, #57 in FY2023 and #70 in FY2024; up 3 since FY2024.
68	WE2 Support Services 8A JV LLC Top NAICS codes 561210 Facilities Support Services	$23,993,223	0.1%	Rank history: #44 in FY2021, #46 in FY2022, #41 in FY2023 and #51 in FY2024; down 17 since FY2024.
69	Koniag, Inc. Through Kadiak LLC Top NAICS codes 541618 Other Management Consulting Services 541611 Administrative Management and General Management Consulting Services	$23,560,800	<0.1%	Rank history: #82 in FY2021, #81 in FY2022, #70 in FY2023 and not on the FY2024 list; up 105 since FY2024.
70	Edgewater Federal Solutions, Inc. Top NAICS codes 541330 Engineering Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541611 Administrative Management and General Management Consulting Services	$22,743,841	<0.1%	Rank history: #68 in FY2021, #60 in FY2022, #66 in FY2023 and #74 in FY2024; up 4 since FY2024.
71	Technomics Inc. Top NAICS codes 541330 Engineering Services	$22,270,853	<0.1%	Rank history: #73 in FY2021, #99 in FY2022, #97 in FY2023 and #79 in FY2024; up 8 since FY2024.
72	Palantir Technologies Inc. Top NAICS codes 511210 Software Publishers	$21,546,065	<0.1%	Rank history: not on the FY2021 list, #70 in FY2022, #78 in FY2023 and #75 in FY2024; up 3 since FY2024.
73	Tetra Tech, Inc. 4 awardees, including Bluewater Federal Solutions, Inc. and Amyx Inc. Top NAICS codes 541330 Engineering Services 541620 Environmental Consulting Services 541512 Computer Systems Design Services	$19,965,693	<0.1%	Rank history: #88 in FY2021, #78 in FY2022, #93 in FY2023 and #81 in FY2024; up 8 since FY2024.
74	Allegheny Science & Technology Corporation Top NAICS codes 541330 Engineering Services	$18,967,318	<0.1%	Rank history: #78 in FY2021, #83 in FY2022, #76 in FY2023 and #80 in FY2024; up 6 since FY2024.
75	The Building People LLC Top NAICS codes 561210 Facilities Support Services 541611 Administrative Management and General Management Consulting Services	$18,760,481	<0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #56 in FY2024; down 19 since FY2024.
76	Sigma Science Inc Through RSI Nuclear, LLC Top NAICS codes 541330 Engineering Services	$18,076,203	<0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #76 in FY2024; unchanged since FY2024.
77	Kpmg LLP Top NAICS codes 541211 Offices of Certified Public Accountants	$17,589,020	<0.1%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; up 16 since FY2024.
78	General Dynamics Corporation 3 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top NAICS codes 541519 Other Computer Related Services 334290 Other Communications Equipment Manufacturing	$17,062,422	<0.1%	Rank history: not on the FY2021 list, #66 in FY2022, #75 in FY2023 and #65 in FY2024; down 13 since FY2024.
79	Seatech Global Security Solutions Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$16,014,317	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 53 since FY2024.
80	Street Legal Industries LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 561210 Facilities Support Services 561110 Office Administrative Services	$15,588,322	<0.1%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 12 since FY2024.
81	Epsilon Inc Top NAICS codes 541512 Computer Systems Design Services	$15,162,417	<0.1%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and #88 in FY2024; up 7 since FY2024.
82	Deloitte 3 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services 541512 Computer Systems Design Services	$15,037,574	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 51 since FY2024.
83	3M Company Top NAICS codes 325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing	$14,840,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 134 since FY2024.
84	Hunatek System Solutions LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$14,591,090	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
85	CADRE5 LLC Top NAICS codes 541511 Custom Computer Programming Services	$14,386,158	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 67 since FY2024.
86	Emcor Group Inc. Through Emcor Government Services, Inc. Top NAICS codes 561210 Facilities Support Services	$14,266,541	<0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; up 3 since FY2024.
87	Multiquip Inc. Through Olsson Industrial Electric, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$14,191,764	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 174 since FY2024.
88	Canadian Commercial Corporation Top NAICS codes 335312 Motor and Generator Manufacturing	$13,969,399	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Global Engineering & Technology Inc Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541611 Administrative Management and General Management Consulting Services	$13,879,134	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 45 since FY2024.
90	Ivory Cloud LLC Top NAICS codes 541511 Custom Computer Programming Services	$13,202,999	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 17 since FY2024.
91	Procentrix, LLC Top NAICS codes 541519 Other Computer Related Services	$13,178,880	<0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #85 in FY2024; down 6 since FY2024.
92	On Point Associates, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services	$12,960,786	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
93	Team B Marketing, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$12,945,500	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 15 since FY2024.
94	IMG - Crown Energy Services Joint Venture, LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$12,800,196	<0.1%	Rank history: #63 in FY2021, not on the FY2022 list, #79 in FY2023 and not on the FY2024 list; up 7 since FY2024.
95	Amvet Technologies LLC Top NAICS codes 541519 Other Computer Related Services	$12,670,507	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 24 since FY2024.
96	Paragon Professional Services LLC Top NAICS codes 562910 Remediation Services	$12,210,427	<0.1%	Rank history: #95 in FY2021, not on the FY2022 list, #100 in FY2023 and #94 in FY2024; down 2 since FY2024.
97	Simmons & Golden Security LLC Top NAICS codes 561612 Security Guards and Patrol Services	$11,819,740	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 104 since FY2024.
98	Enterprise Technical Assistance Services Inc. Top NAICS codes 562910 Remediation Services	$11,551,613	<0.1%	Rank history: #61 in FY2021, #65 in FY2022, #60 in FY2023 and #66 in FY2024; down 32 since FY2024.
99	S & K Logistics Services LLC Top NAICS codes 561210 Facilities Support Services 541330 Engineering Services	$11,193,343	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 26 since FY2024.
100	V3Gate, LLC Top NAICS codes 541519 Other Computer Related Services 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$10,825,574	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 4 since FY2024.

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 $47.6 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