Top 100 Defense Health Agency Contractors, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Humana Government Business Inc. Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$6,170,762,965	28.6%	Rank history: #15 in FY2021, not on the FY2022–FY2023 lists, #1 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Triwest Healthcare Alliance Corp Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$5,703,592,973	26.4%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #2 in FY2025; unchanged since Jul 2024–Jun 2025.
3	Evernorth Federal Services Inc. Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$686,514,329	3.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
4	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. and QTC Medical Services Inc. Top NAICS codes 541512 Computer Systems Design Services 621112 Offices of Physicians, Mental Health Specialists 621111 Offices of Physicians (except Mental Health Specialists)	$456,589,526	2.1%	Rank history: #4 in FY2021, #4 in FY2022, #4 in FY2023, #5 in FY2024 and #7 in FY2025; up 2 since Jul 2024–Jun 2025.
5	Johns Hopkins University 3 awardees, including The Johns Hopkins Medical Services Corporation and The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 524114 Direct Health and Medical Insurance Carriers 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$451,649,685	2.1%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #5 in FY2025; unchanged since Jul 2024–Jun 2025.
6	United Concordia Companies, Inc. Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$422,693,689	2.0%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #8 in FY2025; up 2 since Jul 2024–Jun 2025.
7	Martins Point Health Care Inc. Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$384,633,972	1.8%	Rank history: #7 in FY2021, #8 in FY2022, #6 in FY2023, #7 in FY2024 and #6 in FY2025; unchanged since Jul 2024–Jun 2025.
8	Medical Technology Enterprise Consortium	$176,922,266	0.8%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023, #11 in FY2024 and #10 in FY2025; up 1 since Jul 2024–Jun 2025.
9	International Sos Government Services LLC Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$158,636,380	0.7%	Rank history: #13 in FY2021, #16 in FY2022, #13 in FY2023, #14 in FY2024 and #12 in FY2025; up 2 since Jul 2024–Jun 2025.
10	Christus Health Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$146,678,653	0.7%	Rank history: #11 in FY2021, #15 in FY2022, #14 in FY2023, #16 in FY2024 and #14 in FY2025; up 21 since Jul 2024–Jun 2025.
11	Pacmed Clinics Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$146,329,469	0.7%	Rank history: #9 in FY2021, #11 in FY2022, #11 in FY2023, #13 in FY2024 and #11 in FY2025; up 1 since Jul 2024–Jun 2025.
12	BCG Federal Corp. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$140,500,002	0.7%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and not on the FY2025 list; down 2 since Jul 2024–Jun 2025.
13	Brighton Marine, Inc. Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$135,200,000	0.6%	Rank history: #10 in FY2021, #12 in FY2022, #12 in FY2023, #15 in FY2024 and #13 in FY2025; up 1 since Jul 2024–Jun 2025.
14	Decypher Technologies Ltd 3 awardees, including Decypher Health Services, LLC and Global Shield Health Consultants, LLC Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists) 622110 General Medical and Surgical Hospitals 621399 Offices of All Other Miscellaneous Health Practitioners	$130,145,779	0.6%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and #22 in FY2025; up 23 since Jul 2024–Jun 2025.
15	Peraton Inc. 2 awardees, including Peraton Enterprise Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$118,652,254	0.5%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #18 in FY2025; up 2 since Jul 2024–Jun 2025.
16	Dell Technologies Inc. 2 awardees, including Dell Federal Systems L.P and Dell Marketing L.P. Top NAICS codes 511210 Software Publishers 334111 Electronic Computer Manufacturing 513210 Software Publishers	$109,686,258	0.5%	Rank history: not on the FY2021–FY2023 lists, #19 in FY2024 and #17 in FY2025; unchanged since Jul 2024–Jun 2025.
17	Enterprise Resource Planning International, LLC Top NAICS codes 622110 General Medical and Surgical Hospitals	$103,476,445	0.5%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023, #32 in FY2024 and #16 in FY2025; up 1 since Jul 2024–Jun 2025.
18	Svcmc, Inc. Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$95,498,315	0.4%	Rank history: #14 in FY2021, #17 in FY2022, #15 in FY2023, #18 in FY2024 and #15 in FY2025; down 3 since Jul 2024–Jun 2025.
19	ManTech International Corporation 3 awardees, including Mantech Advanced Systems International, Inc., Cloudpareto LLC and Unison Software Inc. Top NAICS codes 541512 Computer Systems Design Services 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services	$79,325,610	0.4%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; up 3 since Jul 2024–Jun 2025.
20	Matrix Providers Inc. Top NAICS codes 622110 General Medical and Surgical Hospitals 621111 Offices of Physicians (except Mental Health Specialists)	$77,618,200	0.4%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and #35 in FY2025; up 24 since Jul 2024–Jun 2025.
21	Dilligas Corp Top NAICS codes 622110 General Medical and Surgical Hospitals 621999 All Other Miscellaneous Ambulatory Health Care Services 621111 Offices of Physicians (except Mental Health Specialists)	$66,139,976	0.3%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2023, #30 in FY2024 and #23 in FY2025; up 2 since Jul 2024–Jun 2025.
22	Deep Mile Networks LLC Top NAICS codes 611430 Professional and Management Development Training	$61,006,453	0.3%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2023, #24 in FY2024 and #20 in FY2025; down 1 since Jul 2024–Jun 2025.
23	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. and Dynport Vaccine Company LLC Top NAICS codes 813920 Professional Organizations 541511 Custom Computer Programming Services 541990 All Other Professional, Scientific, and Technical Services	$60,439,336	0.3%	Rank history: #35 in FY2021, #29 in FY2022, #19 in FY2023, #27 in FY2024 and #30 in FY2025; up 6 since Jul 2024–Jun 2025.
24	Akahi Associates, LLC 2 awardees, including Akahi Ingenesis Partners LLC Top NAICS codes 622110 General Medical and Surgical Hospitals 541611 Administrative Management and General Management Consulting Services 621999 All Other Miscellaneous Ambulatory Health Care Services	$59,760,229	0.3%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; up 304 since Jul 2024–Jun 2025.
25	Goldbelt, Incorporated 5 awardees, including Goldbelt Glacier Health Services, LLC, Goldbelt Apex, LLC and Goldbelt C6, LLC Top NAICS codes 622110 General Medical and Surgical Hospitals 541714 Research and Development in Biotechnology (except Nanobiotechnology) 561210 Facilities Support Services	$58,884,103	0.3%	Rank history: not on the FY2021 list, #79 in FY2022, #87 in FY2023, not on the FY2024 list and #32 in FY2025; up 44 since Jul 2024–Jun 2025.
26	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541511 Custom Computer Programming Services	$57,288,141	0.3%	Rank history: #12 in FY2021, #10 in FY2022, #74 in FY2023, #29 in FY2024 and #31 in FY2025; down 1 since Jul 2024–Jun 2025.
27	Bristol Bay Native Corporation 12 awardees, including Eagle Integrated Services, LLC, Vista Innovative Solutions, LLC and Vista Defense Technologies, LLC Top NAICS codes 541513 Computer Facilities Management Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541611 Administrative Management and General Management Consulting Services	$57,258,555	0.3%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28	Spectrum Healthcare Resources, Inc. Top NAICS codes 621498 All Other Outpatient Care Centers 621111 Offices of Physicians (except Mental Health Specialists)	$56,380,457	0.3%	Rank history: not on the FY2021–FY2023 lists, #26 in FY2024 and #40 in FY2025; down 2 since Jul 2024–Jun 2025.
29	The Chenega Corporation 17 awardees, including Chenega Professional & Technical Services LLC, Chenega Pro Federal Solutions, LLC and Advanced Chenega Services, LLC Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology) 622110 General Medical and Surgical Hospitals 541511 Custom Computer Programming Services	$55,167,267	0.3%	Rank history: #100 in FY2021, #66 in FY2022, #90 in FY2023, not on the FY2024 list and #28 in FY2025; new, not ranked in Jul 2024–Jun 2025.
30	Laboratory Corporation of America 4 awardees, including Center for Disease Detection, LLC and Bode Cellmark Forensics, Inc. Top NAICS codes 621511 Medical Laboratories 541380 Testing Laboratories and Services	$54,624,771	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
31	Lawrence Livermore National Security, LLC	$54,323,904	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
32	The Regents of the University of California	$52,989,354	0.2%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #36 in FY2025; down 12 since Jul 2024–Jun 2025.
33	Magnificus Corporation Top NAICS codes 622110 General Medical and Surgical Hospitals	$51,718,564	0.2%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023, #52 in FY2024 and #26 in FY2025; down 3 since Jul 2024–Jun 2025.
34	Wisconsin Physicians Service Insurance Corp. Top NAICS codes 524292 Pharmacy Benefit Management and Other Third Party Administration of Insurance and Pension Funds	$51,317,158	0.2%	Rank history: #18 in FY2021, #23 in FY2022, #32 in FY2023, #36 in FY2024 and #44 in FY2025; up 2 since Jul 2024–Jun 2025.
35	Luke & Associates Inc. Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists) 622110 General Medical and Surgical Hospitals	$49,973,024	0.2%	Rank history: #17 in FY2021, #20 in FY2022, #22 in FY2023, #31 in FY2024 and #37 in FY2025; up 20 since Jul 2024–Jun 2025.
36	Aleknagik Technology, LLC Top NAICS codes 541519 Other Computer Related Services 621340 Offices of Physical, Occupational and Speech Therapists, and Audiologists 541513 Computer Facilities Management Services	$48,098,082	0.2%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; up 63 since Jul 2024–Jun 2025.
37	TLS Joint Venture LLC Top NAICS codes 561720 Janitorial Services	$47,806,831	0.2%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; up 20 since Jul 2024–Jun 2025.
38	Cherokee Nation 7 awardees, including Cherokee Nation Integrated Health, L.L.C., Cherokee Nation Strategic Programs, L.L.C. and Cherokee Nation Defense Solutions LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services 541519 Other Computer Related Services	$47,570,170	0.2%	Rank history: #37 in FY2021, #51 in FY2022, #99 in FY2023, not on the FY2024 list and #25 in FY2025; up 56 since Jul 2024–Jun 2025.
39	Ho-Chunk, Inc. 4 awardees, including Dynamic-Hhs JV, LLC, Protege Health Services LLC and Flatwater Solutions Company Top NAICS codes 561720 Janitorial Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 621498 All Other Outpatient Care Centers	$45,649,975	0.2%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; up 197 since Jul 2024–Jun 2025.
40	CORE4CE LLC 2 awardees, including KTR Ventures LLC Top NAICS codes 541330 Engineering Services	$44,215,117	0.2%	Rank history: not on the FY2021–FY2024 lists and #33 in FY2025; up 26 since Jul 2024–Jun 2025.
41	Akiak NS LLC Top NAICS codes 541519 Other Computer Related Services	$42,961,082	0.2%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2023, #40 in FY2024 and #42 in FY2025; down 6 since Jul 2024–Jun 2025.
42	Accenture Federal Services LLC 3 awardees, including Cognosante, LLC Top NAICS codes 541512 Computer Systems Design Services 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$42,936,212	0.2%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #67 in FY2025; up 9 since Jul 2024–Jun 2025.
43	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 513210 Software Publishers 541519 Other Computer Related Services	$42,565,042	0.2%	Rank history: not on the FY2021–FY2025 lists; up 107 since Jul 2024–Jun 2025.
44	Deloitte 2 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services 541512 Computer Systems Design Services	$41,295,994	0.2%	Rank history: #16 in FY2021, #19 in FY2022, #26 in FY2023, #25 in FY2024 and #27 in FY2025; down 16 since Jul 2024–Jun 2025.
45	Bering Straits Native Corporation 7 awardees, including Kapili Services, LLC, Po`okela Solutions, LLC and Bering Straits Global Innovations, 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) 236220 Commercial and Institutional Building Construction	$40,209,404	0.2%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Jul 2024–Jun 2025.
46	Great Hill Solutions, LLC Top NAICS codes 541519 Other Computer Related Services 541211 Offices of Certified Public Accountants 336611 Ship Building and Repairing	$39,491,392	0.2%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023, #46 in FY2024 and #51 in FY2025; up 4 since Jul 2024–Jun 2025.
47	FCN, Inc. Top NAICS codes 541519 Other Computer Related Services	$39,127,261	0.2%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023, not on the FY2024 list and #47 in FY2025; up 71 since Jul 2024–Jun 2025.
48	Agiliti Health Inc Top NAICS codes 811210 Electronic and Precision Equipment Repair and Maintenance 532490 Other Commercial and Industrial Machinery and Equipment Rental and Leasing 541990 All Other Professional, Scientific, and Technical Services	$39,076,487	0.2%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; up 234 since Jul 2024–Jun 2025.
49	Professional Contract Services, Inc. Top NAICS codes 561720 Janitorial Services 561730 Landscaping Services 561210 Facilities Support Services	$38,591,615	0.2%	Rank history: #91 in FY2021, #93 in FY2022, #44 in FY2023, #60 in FY2024 and #48 in FY2025; down 7 since Jul 2024–Jun 2025.
50	Readiforce Government Solutions LLC Top NAICS codes 622110 General Medical and Surgical Hospitals	$38,250,710	0.2%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023, #93 in FY2024 and #61 in FY2025; up 2 since Jul 2024–Jun 2025.
51	Western Door Federal, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services	$38,027,968	0.2%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, #37 in FY2024 and #50 in FY2025; down 17 since Jul 2024–Jun 2025.
52	J & J Maintenance Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 561720 Janitorial Services 561210 Facilities Support Services	$36,690,025	0.2%	Rank history: #33 in FY2021, #24 in FY2022, #33 in FY2023, #34 in FY2024 and #19 in FY2025; down 28 since Jul 2024–Jun 2025.
53	Health Net Federal Services, LLC Top NAICS codes 524114 Direct Health and Medical Insurance Carriers	$36,205,537	0.2%	Rank history: not on the FY2021 list, #5 in FY2022, #8 in FY2023, #3 in FY2024 and #3 in FY2025; down 50 since Jul 2024–Jun 2025.
54	Teya Support Services LLC Top NAICS codes 561720 Janitorial Services	$36,204,954	0.2%	Rank history: not on the FY2021–FY2025 lists; up 288 since Jul 2024–Jun 2025.
55	Dawson Cms, LLC Top NAICS codes 621112 Offices of Physicians, Mental Health Specialists 541513 Computer Facilities Management Services 541611 Administrative Management and General Management Consulting Services	$35,931,831	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2023, #61 in FY2024 and #52 in FY2025; up 88 since Jul 2024–Jun 2025.
56	Spinsys-Dine, LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541330 Engineering Services 541519 Other Computer Related Services	$34,375,219	0.2%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #56 in FY2025; down 9 since Jul 2024–Jun 2025.
57	The Arora Group, Inc. Top NAICS codes 622110 General Medical and Surgical Hospitals	$32,376,654	0.1%	Rank history: #20 in FY2021, #22 in FY2022, #28 in FY2023, #41 in FY2024 and #70 in FY2025; up 48 since Jul 2024–Jun 2025.
58	V3Gate, LLC Top NAICS codes 541519 Other Computer Related Services	$31,771,352	0.1%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023, #53 in FY2024 and #54 in FY2025; down 13 since Jul 2024–Jun 2025.
59	Tyto Athene, LLC 2 awardees, including Qbase, LLC and Tyto Government Solutions Inc. Top NAICS codes 541513 Computer Facilities Management Services 541512 Computer Systems Design Services	$31,119,329	0.1%	Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; new, not ranked in Jul 2024–Jun 2025.
60	Regency Consulting Inc Top NAICS codes 541519 Other Computer Related Services	$30,983,866	0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; new, not ranked in Jul 2024–Jun 2025.
61	US Foods Inc Top NAICS codes 311999 All Other Miscellaneous Food Manufacturing	$30,814,850	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023, #48 in FY2024 and #49 in FY2025; down 28 since Jul 2024–Jun 2025.
62	UnitedHealth Group Incorporated 5 awardees, including Optumhealth Care Solutions, LLC, Optumserve Health Services, Inc. and Change Healthcare Technologies LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 621112 Offices of Physicians, Mental Health Specialists 541519 Other Computer Related Services	$30,757,301	0.1%	Rank history: #8 in FY2021, #9 in FY2022, #17 in FY2023, #38 in FY2024 and #34 in FY2025; down 30 since Jul 2024–Jun 2025.
63	Spectrum Services Group Inc. Top NAICS codes 622110 General Medical and Surgical Hospitals	$29,910,029	0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023, #44 in FY2024 and #39 in FY2025; down 24 since Jul 2024–Jun 2025.
64	The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. 2 awardees, including Camris International, LLC Top NAICS codes 621511 Medical Laboratories 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$29,713,179	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023, #64 in FY2024 and #59 in FY2025; up 11 since Jul 2024–Jun 2025.
65	Lawelawe Defense, Inc. Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services 541513 Computer Facilities Management Services	$29,678,222	0.1%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #41 in FY2025; up 3 since Jul 2024–Jun 2025.
66	T6 Health Systems LLC	$29,649,481	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
67	Giacare & Medtrust JV LLC Top NAICS codes 621399 Offices of All Other Miscellaneous Health Practitioners	$29,649,093	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
68	Distinctive Health Spectrum Care JV LLC 2 awardees, including Distinctive Spectrum Healthcare Solutions JV LLC Top NAICS codes 622110 General Medical and Surgical Hospitals 621999 All Other Miscellaneous Ambulatory Health Care Services	$29,171,476	0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; down 20 since Jul 2024–Jun 2025.
69	AMG Healthcare Services Inc. Top NAICS codes 622110 General Medical and Surgical Hospitals 621399 Offices of All Other Miscellaneous Health Practitioners	$28,662,410	0.1%	Rank history: #81 in FY2021, #77 in FY2022, #66 in FY2023, not on the FY2024 list and #82 in FY2025; up 29 since Jul 2024–Jun 2025.
70	Allied Technologies and Consulting, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$28,592,104	0.1%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and #74 in FY2025; down 16 since Jul 2024–Jun 2025.
71	Andrew Morgan, LLC Top NAICS codes 541511 Custom Computer Programming Services	$28,539,298	0.1%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and #45 in FY2025; down 7 since Jul 2024–Jun 2025.
72	Laboratory Corporation of America Holdings 4 awardees, including Laboratory Corporation of America, Bode Cellmark Forensics, Inc. and Medtox Laboratories Inc. Top NAICS codes 621511 Medical Laboratories 541380 Testing Laboratories and Services 334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals	$28,178,147	0.1%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2023, #39 in FY2024 and #29 in FY2025; down 45 since Jul 2024–Jun 2025.
73	Roche Holdings Inc. 3 awardees, including Roche Diagnostics Corporation, Ventana Medical Systems, Inc. and Roche Diagnostics S.P.A. Top NAICS codes 334516 Analytical Laboratory Instrument Manufacturing 325413 In-Vitro Diagnostic Substance Manufacturing 339112 Surgical and Medical Instrument Manufacturing	$27,236,536	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; down 11 since Jul 2024–Jun 2025.
74	Main Building Maintenance, Inc. Top NAICS codes 561720 Janitorial Services	$26,180,664	0.1%	Rank history: not on the FY2021 list, #85 in FY2022, #60 in FY2023, #56 in FY2024 and #63 in FY2025; down 13 since Jul 2024–Jun 2025.
75	Aims-Usgp JV LLC Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists) 621399 Offices of All Other Miscellaneous Health Practitioners 561110 Office Administrative Services	$25,998,611	0.1%	Rank history: not on the FY2021–FY2025 lists; up 74 since Jul 2024–Jun 2025.
76	Centralcare, Incorporated Top NAICS codes 622110 General Medical and Surgical Hospitals 621111 Offices of Physicians (except Mental Health Specialists)	$24,653,160	0.1%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 107 since Jul 2024–Jun 2025.
77	Empower AI, Inc. Top NAICS codes 541512 Computer Systems Design Services	$24,514,630	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
78	Donald L. Mooney Enterprises, LLC Top NAICS codes 622110 General Medical and Surgical Hospitals	$24,471,274	0.1%	Rank history: #41 in FY2021, #39 in FY2022, #29 in FY2023, #35 in FY2024 and #92 in FY2025; down 29 since Jul 2024–Jun 2025.
79	AIX Tech LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$23,590,619	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
80	Job Options, Incorporated Top NAICS codes 561720 Janitorial Services 812320 Drycleaning and Laundry Services (except Coin-Operated) 812332 Industrial Launderers	$23,546,523	0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 3 since Jul 2024–Jun 2025.
81	Arctic Slope Regional Corporation 3 awardees, including Agile Decision Sciences, LLC, Asrc Federal Cyber, LLC and Asrc Federal Facilities Logistics LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541511 Custom Computer Programming Services 541990 All Other Professional, Scientific, and Technical Services	$22,996,236	0.1%	Rank history: #50 in FY2021, not on the FY2022 list, #97 in FY2023, not on the FY2024 list and #77 in FY2025; up 115 since Jul 2024–Jun 2025.
82	Valor Healthcare Inc. Through Potomac Healthcare Solutions, LLC Top NAICS codes 622110 General Medical and Surgical Hospitals	$22,773,204	0.1%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; new, not ranked in Jul 2024–Jun 2025.
83	American Systems Corporation Top NAICS codes 541513 Computer Facilities Management Services 541511 Custom Computer Programming Services	$22,379,113	0.1%	Rank history: #28 in FY2021, #33 in FY2022, #34 in FY2023, #71 in FY2024 and #72 in FY2025; down 25 since Jul 2024–Jun 2025.
84	Swish Data Corporation Top NAICS codes 541519 Other Computer Related Services	$22,188,863	0.1%	Rank history: not on the FY2021–FY2025 lists; up 260 since Jul 2024–Jun 2025.
85	Bowhead Marine Support Services, LLC Top NAICS codes 561110 Office Administrative Services	$21,538,544	0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; down 25 since Jul 2024–Jun 2025.
86	Red River Technology LLC 2 awardees, including Distributed Technology Group LLC Top NAICS codes 541519 Other Computer Related Services	$21,322,312	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; up 16 since Jul 2024–Jun 2025.
87	HHI Services, Inc. Top NAICS codes 561720 Janitorial Services	$21,197,504	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023, #83 in FY2024 and #89 in FY2025; down 5 since Jul 2024–Jun 2025.
88	Federal Staffing Resources, LLC Top NAICS codes 561110 Office Administrative Services 622110 General Medical and Surgical Hospitals 621111 Offices of Physicians (except Mental Health Specialists)	$20,494,523	0.1%	Rank history: #84 in FY2021, #86 in FY2022 and not on the FY2023–FY2025 lists; up 198 since Jul 2024–Jun 2025.
89	Cape Fox Corporation 3 awardees, including Concentric Methods, LLC, Eagle Health, LLC and Cape Fox Facilities Services, LLC Top NAICS codes 622110 General Medical and Surgical Hospitals 623110 Nursing Care Facilities (Skilled Nursing Facilities) 541611 Administrative Management and General Management Consulting Services	$20,174,886	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; down 5 since Jul 2024–Jun 2025.
90	Ophirex, Inc.	$19,912,417	0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 49 since Jul 2024–Jun 2025.
91	Planned Systems International Inc. Top NAICS codes 541511 Custom Computer Programming Services	$19,459,231	0.1%	Rank history: #52 in FY2021, #50 in FY2022, #45 in FY2023, #66 in FY2024 and not on the FY2025 list; unchanged since Jul 2024–Jun 2025.
92	CDW Government LLC 2 awardees, including Sirius Federal LLC Top NAICS codes 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing 511210 Software Publishers	$19,317,704	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	Valiant Integrated Services LLC Through Valiant Government Services LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$18,733,683	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; up 149 since Jul 2024–Jun 2025.
94	Katmai Health Services LLC Top NAICS codes 622110 General Medical and Surgical Hospitals 541513 Computer Facilities Management Services	$18,661,065	0.1%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; down 14 since Jul 2024–Jun 2025.
95	Sentar Inc. Top NAICS codes 541330 Engineering Services	$18,464,347	0.1%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 49 since Jul 2024–Jun 2025.
96	Danaher Corporation 11 awardees, including Beckman Coulter, Inc., Cepheid and Beckman Coulter Gesellschaft MIT Beschraenkter Haftung Top NAICS codes 334516 Analytical Laboratory Instrument Manufacturing 325413 In-Vitro Diagnostic Substance Manufacturing 811210 Electronic and Precision Equipment Repair and Maintenance	$18,364,782	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; down 4 since Jul 2024–Jun 2025.
97	Koniag, Inc. 2 awardees, including Koniag It Systems, LLC and Kadiak LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 622110 General Medical and Surgical Hospitals	$18,320,718	0.1%	Rank history: #57 in FY2021, #70 in FY2022, #69 in FY2023, not on the FY2024 list and #68 in FY2025; down 24 since Jul 2024–Jun 2025.
98	Aspire-Luke JV LLC Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists)	$17,889,500	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
99	SNA International LLC Top NAICS codes 541714 Research and Development in Biotechnology (except Nanobiotechnology)	$16,852,113	0.1%	Rank history: #61 in FY2021, #56 in FY2022, #70 in FY2023, #76 in FY2024 and #79 in FY2025; down 28 since Jul 2024–Jun 2025.
100	Magnolia Government Solutions LLC Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists)	$16,464,648	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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 $21.6 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Jul 2024–Jun 2025. "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.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers