Top 100 Department of Energy Contractors, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Triad National Security LLC Top NAICS codes 561210 Facilities Support Services	$4,886,378,956	10.7%	Rank history: #2 in FY2021, #3 in FY2022, #2 in FY2023 and #2 in FY2025; up 1 since FY2023.
2	Honeywell International Inc. 4 awardees, including National Technology & Engineering Solutions of Sandia, LLC and Honeywell Federal Manufacturing & Technologies, LLC Top NAICS codes 561210 Facilities Support Services	$4,516,561,179	9.9%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2025; down 1 since FY2023.
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	$4,451,378,604	9.7%	Rank history: #5 in FY2021, #7 in FY2022, #5 in FY2023 and #3 in FY2025; up 2 since FY2023.
4	Consolidated Nuclear Security, LLC Top NAICS codes 561210 Facilities Support Services	$3,620,428,215	7.9%	Rank history: #4 in FY2021, #2 in FY2022, #3 in FY2023 and #7 in FY2025; down 1 since FY2023.
5	Lawrence Livermore National Security, LLC	$2,789,423,025	6.1%	Rank history: #6 in FY2021, #5 in FY2022, #7 in FY2023 and #5 in FY2025; up 2 since FY2023.
6	Battelle Memorial Institute 3 awardees, including Battelle Energy Alliance, LLC and Battelle Savannah River Alliance, 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)	$2,761,179,297	6.0%	Rank history: #3 in FY2021, #4 in FY2022, #9 in FY2023 and #4 in FY2025; up 3 since FY2023.
7	Ut-Battelle LLC Top NAICS codes 561210 Facilities Support Services	$2,546,284,451	5.6%	Rank history: #7 in FY2021, #6 in FY2022, #4 in FY2023 and #6 in FY2025; down 3 since FY2023.
8	Amentum Services, Inc. 4 awardees, including Washington River Protection Solutions LLC and Central Plateau Cleanup Company, LLC Top NAICS codes 562211 Hazardous Waste Treatment and Disposal 562910 Remediation Services	$1,123,543,989	2.5%	Rank history: #10 in FY2021, #10 in FY2022, #13 in FY2023 and not on the FY2025 list; up 5 since FY2023.
9	The Regents of the University of California Top NAICS codes 611310 Colleges, Universities, and Professional Schools	$1,119,518,533	2.4%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
10	Mission Support & Test Services LLC Top NAICS codes 561210 Facilities Support Services	$1,063,526,307	2.3%	Rank history: #12 in FY2021, #13 in FY2022, #16 in FY2023 and #15 in FY2025; up 6 since FY2023.
11	Alliance for Energy Innovation, LLC Top NAICS codes 541711 Research and Development in Biotechnology	$1,060,616,010	2.3%	Rank history: #16 in FY2021, #14 in FY2022, #12 in FY2023 and #16 in FY2025; up 1 since FY2023.
12	Uchicago Argonne, LLC	$940,011,274	2.1%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2025; new.
13	Savannah River Mission Completion, LLC Top NAICS codes 562910 Remediation Services	$885,649,780	1.9%	Rank history: not on the FY2021 list, #16 in FY2022, #14 in FY2023 and #13 in FY2025; up 1 since FY2023.
14	Bechtel Corp Through Bechtel National, Inc.	$874,599,600	1.9%	Rank history: #14 in FY2021, #19 in FY2022, #19 in FY2023 and #14 in FY2025; up 5 since FY2023.
15	Battelle Energy Alliance, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$802,657,951	1.8%	Rank history: not on the FY2021 list, #24 in FY2022, #8 in FY2023 and not on the FY2025 list; down 7 since FY2023.
16	Brookhaven Science Associates LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$797,151,609	1.7%	Rank history: #15 in FY2021, #12 in FY2022, #15 in FY2023 and #17 in FY2025; down 1 since FY2023.
17	The Leland Stanford Junior University Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology) 611310 Colleges, Universities, and Professional Schools	$677,638,914	1.5%	Rank history: #17 in FY2021, #15 in FY2022, #18 in FY2023 and #19 in FY2025; up 1 since FY2023.
18	United Cleanup Oak Ridge LLC Top NAICS codes 562910 Remediation Services	$592,276,416	1.3%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023 and #27 in FY2025; down 1 since FY2023.
19	National Technology & Engineering Solutions of Sandia, LLC Top NAICS codes 561210 Facilities Support Services	$574,191,016	1.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
20	Fermi Research Alliance, LLC	$549,713,035	1.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
21	Accenture Federal Services LLC Top NAICS codes 541512 Computer Systems Design Services	$476,108,548	1.0%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
22	Jacobs Engineering Group Inc. 2 awardees, including Idaho Environmental Coalition LLC Top NAICS codes 562910 Remediation Services	$397,618,528	0.9%	Rank history: #28 in FY2021, not on the FY2022 list, #32 in FY2023 and not on the FY2025 list; up 10 since FY2023.
23	Government of the United States 4 awardees, including Fermi Research Alliance, LLC, Uchicago Argonne, LLC and Federal Prison Industries, Inc. Top NAICS codes 339950 Sign Manufacturing	$352,814,554	0.8%	Rank history: #9 in FY2021, #9 in FY2022, #10 in FY2023 and not on the FY2025 list; down 13 since FY2023.
24	Oak Ridge Associated Universities, Incorporated Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541611 Administrative Management and General Management Consulting Services	$352,330,852	0.8%	Rank history: #19 in FY2021, #20 in FY2022, #21 in FY2023 and #26 in FY2025; down 3 since FY2023.
25	Battelle Savannah River Alliance, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$278,585,044	0.6%	Rank history: #22 in FY2021, not on the FY2022–FY2023 lists and #21 in FY2025; returned.
26	Jefferson Science Associates, LLC	$213,763,183	0.5%	Rank history: #23 in FY2021, #21 in FY2022, #22 in FY2023 and #23 in FY2025; down 4 since FY2023.
27	Amentum Holdings, Inc. 6 awardees, including Washington River Protection Solutions LLC and Central Plateau Cleanup Company, LLC Top NAICS codes 562211 Hazardous Waste Treatment and Disposal 562910 Remediation Services	$181,269,588	0.4%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
28	Savannah River Nuclear Solutions LLC Top NAICS codes 561210 Facilities Support Services	$175,500,785	0.4%	Rank history: #8 in FY2021, #8 in FY2022, #6 in FY2023 and not on the FY2025 list; down 22 since FY2023.
29	State of California Controllers Office 2 awardees, including The Regents of the University of California Top NAICS codes 611430 Professional and Management Development Training	$166,341,688	0.4%	Rank history: #11 in FY2021, #11 in FY2022, #11 in FY2023 and not on the FY2025 list; down 18 since FY2023.
30	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. and Tetra Tech, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541620 Environmental Consulting Services 541611 Administrative Management and General Management Consulting Services	$144,165,896	0.3%	Rank history: #20 in FY2021, #27 in FY2022, #24 in FY2023 and #24 in FY2025; down 6 since FY2023.
31	The Trustees of Princeton University Top NAICS codes 611310 Colleges, Universities, and Professional Schools	$135,520,277	0.3%	Rank history: #24 in FY2021, #23 in FY2022, #23 in FY2023 and #22 in FY2025; down 8 since FY2023.
32	Mid-America Conversion Services, LLC Top NAICS codes 325180 Other Basic Inorganic Chemical Manufacturing	$131,041,286	0.3%	Rank history: #27 in FY2021, #28 in FY2022, #25 in FY2023 and #33 in FY2025; down 7 since FY2023.
33	Hanford Laboratory Management and Integration LLC Top NAICS codes 562910 Remediation Services	$120,000,839	0.3%	Rank history: #47 in FY2021, #31 in FY2022, #31 in FY2023 and #34 in FY2025; down 2 since FY2023.
34	Energy Technology Alliance LLC Top NAICS codes 562910 Remediation Services	$117,718,826	0.3%	Rank history: not on the FY2021–FY2023 lists and #36 in FY2025; new.
35	RSI Entech, LLC Top NAICS codes 562910 Remediation Services	$106,859,649	0.2%	Rank history: #33 in FY2021, #29 in FY2022, #29 in FY2023 and not on the FY2025 list; down 6 since FY2023.
36	Idaho Environmental Coalition LLC Top NAICS codes 562910 Remediation Services	$99,813,459	0.2%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
37	Mele Associates Inc. Top NAICS codes 541330 Engineering Services 621112 Offices of Physicians, Mental Health Specialists	$91,957,291	0.2%	Rank history: #48 in FY2021, #36 in FY2022, #34 in FY2023 and #32 in FY2025; down 3 since FY2023.
38	BWX Technologies, Inc. 3 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 541690 Other Scientific and Technical Consulting Services 562211 Hazardous Waste Treatment and Disposal	$77,873,903	0.2%	Rank history: not on the FY2021 list, #58 in FY2022, #28 in FY2023 and #28 in FY2025; down 10 since FY2023.
39	Parsons Corporation 2 awardees, including Parsons Government Services Inc. and Parsons Government Services International Inc. Top NAICS codes 541330 Engineering Services 236210 Industrial Building Construction 541990 All Other Professional, Scientific, and Technical Services	$64,739,101	0.1%	Rank history: #26 in FY2021, #43 in FY2022, #48 in FY2023 and #43 in FY2025; up 9 since FY2023.
40	Iowa State University of Science and Technology	$61,356,933	0.1%	Rank history: #34 in FY2021, #33 in FY2022, #27 in FY2023 and #31 in FY2025; down 13 since FY2023.
41	Navarro Research and Engineering, Inc. Top NAICS codes 562910 Remediation Services	$59,964,455	0.1%	Rank history: #32 in FY2021, #37 in FY2022, #37 in FY2023 and #39 in FY2025; down 4 since FY2023.
42	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 561990 All Other Support Services 541511 Custom Computer Programming Services	$59,875,430	0.1%	Rank history: #50 in FY2021, #45 in FY2022, #40 in FY2023 and #42 in FY2025; down 2 since FY2023.
43	American Centrifuge Operating, LLC Top NAICS codes 221113 Nuclear Electric Power Generation	$58,971,104	0.1%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2025; new.
44	Keylogic, LLC Top NAICS codes 541330 Engineering Services	$55,275,304	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
45	Atkins Nuclear Secured Holdings Corporation 2 awardees, including Isotek Systems, LLC Top NAICS codes 561990 All Other Support Services	$54,178,195	0.1%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2025; up 111 since FY2023.
46	KBC Energy Solutions LLC Top NAICS codes 541330 Engineering Services	$50,310,656	0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #59 in FY2025; up 1 since FY2023.
47	Guidehouse Inc. 2 awardees, including Aptim Federal Services, LLC Top NAICS codes 562910 Remediation Services 541611 Administrative Management and General Management Consulting Services	$49,611,138	0.1%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2025; new.
48	Project Enhancement Corporation Top NAICS codes 541620 Environmental Consulting Services	$48,245,210	0.1%	Rank history: #49 in FY2021, #47 in FY2022, #44 in FY2023 and #46 in FY2025; down 4 since FY2023.
49	Jacobs Government Services Company 4 awardees, including Ch2M Hill Bwxt West Valley, LLC and Amentum Technology, Inc. Top NAICS codes 562910 Remediation Services	$47,264,061	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
50	Silver Lake Construction LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$45,624,448	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
51	WE2 Support Services 8A JV LLC Top NAICS codes 561210 Facilities Support Services	$44,059,361	0.1%	Rank history: #44 in FY2021, #46 in FY2022, #41 in FY2023 and #70 in FY2025; down 10 since FY2023.
52	Minburn Technology Group, LLC Top NAICS codes 541519 Other Computer Related Services	$43,672,536	0.1%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2025; new.
53	Techsource, LLC Top NAICS codes 541330 Engineering Services	$43,497,868	0.1%	Rank history: #57 in FY2021, #57 in FY2022, #56 in FY2023 and not on the FY2025 list; up 3 since FY2023.
54	Unwin Co Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$42,405,024	0.1%	Rank history: #51 in FY2021, #48 in FY2022, #49 in FY2023 and #57 in FY2025; down 5 since FY2023.
55	Swift & Staley Inc. Top NAICS codes 561210 Facilities Support Services	$41,995,927	0.1%	Rank history: #52 in FY2021, #41 in FY2022, #51 in FY2023 and #61 in FY2025; down 4 since FY2023.
56	The Building People LLC Top NAICS codes 561210 Facilities Support Services 541611 Administrative Management and General Management Consulting Services	$39,273,926	0.1%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #75 in FY2025; up 2 since FY2023.
57	Carahsoft Technology Corp Top NAICS codes 541519 Other Computer Related Services 511210 Software Publishers 334111 Electronic Computer Manufacturing	$37,719,537	0.1%	Rank history: #58 in FY2021, #32 in FY2022, not on the FY2023 list and #65 in FY2025; up 89 since FY2023.
58	North Wind General Contractors LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 238210 Electrical Contractors and Other Wiring Installation Contractors	$37,208,010	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
59	The Aerospace Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$37,199,750	0.1%	Rank history: #66 in FY2021, #53 in FY2022, #59 in FY2023 and #52 in FY2025; unchanged since FY2023.
60	Cook Inlet Region Inc. 2 awardees, including North Wind Portage, Inc. Top NAICS codes 562910 Remediation Services	$37,094,142	0.1%	Rank history: #25 in FY2021, #34 in FY2022, #38 in FY2023 and not on the FY2025 list; down 22 since FY2023.
61	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$36,517,660	0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and #55 in FY2025; up 2 since FY2023.
62	Archetype II LLC Top NAICS codes 523930 Investment Advice	$35,902,456	0.1%	Rank history: not on the FY2021 list, #69 in FY2022, #55 in FY2023 and not on the FY2025 list; down 7 since FY2023.
63	Criterion Systems, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$35,764,103	0.1%	Rank history: #31 in FY2021, #38 in FY2022, #39 in FY2023 and not on the FY2025 list; down 24 since FY2023.
64	Ch2M Hill Bwxt West Valley, LLC Top NAICS codes 562910 Remediation Services	$34,205,283	0.1%	Rank history: #30 in FY2021, #30 in FY2022, #30 in FY2023 and not on the FY2025 list; down 34 since FY2023.
65	General Dynamics Corporation 4 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top NAICS codes 541519 Other Computer Related Services 541511 Custom Computer Programming Services 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing	$33,702,762	0.1%	Rank history: not on the FY2021 list, #66 in FY2022, #75 in FY2023 and #80 in FY2025; up 10 since FY2023.
66	Enterprise Technical Assistance Services Inc. Top NAICS codes 562910 Remediation Services	$32,721,436	0.1%	Rank history: #61 in FY2021, #65 in FY2022, #60 in FY2023 and not on the FY2025 list; down 6 since FY2023.
67	North Wind Portage, Inc. Top NAICS codes 562910 Remediation Services	$32,553,646	0.1%	Rank history: not on the FY2021 list, #49 in FY2022, not on the FY2023 list and not on the FY2025 list; up 52 since FY2023.
68	Diazyme Laboratories Inc. Through General Atomics Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$31,091,540	0.1%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2025; new.
69	Centerra Group, LLC Top NAICS codes 561612 Security Guards and Patrol Services	$30,470,944	0.1%	Rank history: #86 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
70	Regents of the University of California the (4458)	$28,908,000	0.1%	Rank history: #37 in FY2021, #79 in FY2022, #57 in FY2023 and #69 in FY2025; down 13 since FY2023.
71	Management Solutions LLC Top NAICS codes 541511 Custom Computer Programming Services 561210 Facilities Support Services 561110 Office Administrative Services	$26,750,021	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and #41 in FY2025; up 9 since FY2023.
72	Centrus Energy Corp. Through American Centrifuge Operating, LLC Top NAICS codes 221113 Nuclear Electric Power Generation	$26,028,896	0.1%	Rank history: #43 in FY2021, #62 in FY2022, #43 in FY2023 and not on the FY2025 list; down 29 since FY2023.
73	Kupono Government Services, LLC Top NAICS codes 611430 Professional and Management Development Training	$24,741,277	0.1%	Rank history: #60 in FY2021, #67 in FY2022, #67 in FY2023 and not on the FY2025 list; down 6 since FY2023.
74	Edgewater Federal Solutions, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541519 Other Computer Related Services 541330 Engineering Services	$24,568,006	0.1%	Rank history: #68 in FY2021, #60 in FY2022, #66 in FY2023 and #71 in FY2025; down 8 since FY2023.
75	Palantir Technologies Inc. Top NAICS codes 511210 Software Publishers	$24,060,575	0.1%	Rank history: not on the FY2021 list, #70 in FY2022, #78 in FY2023 and #73 in FY2025; up 3 since FY2023.
76	Sigma Science Inc Through RSI Nuclear, LLC Top NAICS codes 541330 Engineering Services	$22,392,569	<0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #77 in FY2025; up 5 since FY2023.
77	KBR Wyle Services LLC Through Dependable Global Solutions, LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$21,985,550	<0.1%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2025; new.
78	Attain Consulting Group LLC Through Maximus Federal Technology Solutions, LLC Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services	$21,273,124	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	Technomics Inc. Top NAICS codes 541330 Engineering Services	$21,051,321	<0.1%	Rank history: #73 in FY2021, #99 in FY2022, #97 in FY2023 and #72 in FY2025; up 18 since FY2023.
80	Allegheny Science & Technology Corporation Top NAICS codes 541330 Engineering Services	$19,687,651	<0.1%	Rank history: #78 in FY2021, #83 in FY2022, #76 in FY2023 and #74 in FY2025; down 4 since FY2023.
81	Tetra Tech, Inc. 4 awardees, including Bluewater Federal Solutions, Inc. Top NAICS codes 541330 Engineering Services 541620 Environmental Consulting Services	$19,488,378	<0.1%	Rank history: #88 in FY2021, #78 in FY2022, #93 in FY2023 and #66 in FY2025; up 12 since FY2023.
82	General Electric Company 4 awardees, including GE Renewables US LLC, GE Energy Management Services, LLC and GE Vernova International LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 513210 Software Publishers 511210 Software Publishers	$18,864,376	<0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023 and not on the FY2025 list; down 9 since FY2023.
83	Accenture Inc. Through Accenture Federal Services LLC Top NAICS codes 541512 Computer Systems Design Services	$18,463,265	<0.1%	Rank history: not on the FY2021 list, #22 in FY2022, #20 in FY2023 and not on the FY2025 list; down 63 since FY2023.
84	Kadiak LLC Top NAICS codes 541618 Other Management Consulting Services 541611 Administrative Management and General Management Consulting Services	$18,174,951	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Procentrix, LLC Top NAICS codes 541519 Other Computer Related Services	$17,431,371	<0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #93 in FY2025; up 7 since FY2023.
86	Hitt Contracting, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$16,229,216	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 53 since FY2023.
87	Tech2 Solutions Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$15,718,719	<0.1%	Rank history: #45 in FY2021, #64 in FY2022, #72 in FY2023 and not on the FY2025 list; down 15 since FY2023.
88	Epsilon Inc Top NAICS codes 541512 Computer Systems Design Services	$15,062,408	<0.1%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and #83 in FY2025; up 2 since FY2023.
89	Emcor Group Inc. Through Emcor Government Services, Inc. Top NAICS codes 561210 Facilities Support Services	$15,044,131	<0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2025; up 20 since FY2023.
90	Rack-Wildner & Reese, Inc. Top NAICS codes 541820 Public Relations Agencies	$14,684,345	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
91	Htgs-Culmen JV LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$14,499,761	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 17 since FY2023.
92	Street Legal Industries LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 561110 Office Administrative Services 561210 Facilities Support Services	$14,035,343	<0.1%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2025; up 14 since FY2023.
93	Kpmg LLP Top NAICS codes 541211 Offices of Certified Public Accountants	$13,813,679	<0.1%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2025; new.
94	Paragon Professional Services LLC Top NAICS codes 562910 Remediation Services	$13,579,453	<0.1%	Rank history: #95 in FY2021, not on the FY2022 list, #100 in FY2023 and not on the FY2025 list; up 6 since FY2023.
95	Southwest Research Institute Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services	$13,157,590	<0.1%	Rank history: #71 in FY2021, #91 in FY2022, not on the FY2023 list and not on the FY2025 list; up 9 since FY2023.
96	Pantexas Deterrence, LLC Top NAICS codes 561210 Facilities Support Services	$13,000,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2025; new.
97	Chenega Worldwide Support, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$12,940,081	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
98	Cast Specialty Transportation Inc. Top NAICS codes 484230 Specialized Freight (except Used Goods) Trucking, Long-Distance	$12,666,351	<0.1%	Rank history: not on the FY2021 list, #98 in FY2022, not on the FY2023 list and not on the FY2025 list; up 47 since FY2023.
99	Catawba-Tea, LLC Top NAICS codes 562910 Remediation Services 541990 All Other Professional, Scientific, and Technical Services	$12,456,835	<0.1%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023 and not on the FY2025 list; down 3 since FY2023.
100	Semanticbits LLC Through ICF Incorporated, L.L.C. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services	$12,149,903	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.

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 $45.7 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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