Top 100 Office of the Secretary of Defense Contractors, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	The Mitre Corporation Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541611 Administrative Management and General Management Consulting Services	$460,017,967	10.4%	Rank history: #5 in FY2022, #4 in FY2023, #7 in FY2024 and #18 in FY2025; unchanged since FY2020.
2	Fedex Corp Through Federal Express Corporation Top NAICS codes 492110 Couriers and Express Delivery Services 481112 Scheduled Freight Air Transportation	$258,250,896	5.8%	Rank history: #4 in FY2022, #9 in FY2023, #2 in FY2024 and #3 in FY2025; up 3 since FY2020.
3	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. and Middle Bay Solutions II, LLC 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 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$253,343,246	5.7%	Rank history: #6 in FY2022, #3 in FY2023, #1 in FY2024 and #2 in FY2025; down 1 since FY2020.
4	The Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 611310 Colleges, Universities, and Professional Schools 541713 Research and Development in Nanotechnology	$179,486,634	4.1%	Rank history: #9 in FY2022, #10 in FY2023, #79 in FY2024 and not on the FY2025 list; unchanged since FY2020.
5	Alion Science and Technology Corporation 2 awardees, including HII Mission Technologies Corp 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)	$145,146,815	3.3%	Rank history: not on the FY2022 list, #23 in FY2023, #77 in FY2024 and not on the FY2025 list; up 1 since FY2020.
6	Institute for Defense Analyses Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$117,225,438	2.7%	Rank history: #23 in FY2022, #8 in FY2023, #6 in FY2024 and #9 in FY2025; up 4 since FY2020.
7	Northrop Grumman Corporation 12 awardees, including Orbital Sciences LLC and Northrop Grumman Systems Corporation Top NAICS codes 541330 Engineering Services 336414 Guided Missile and Space Vehicle Manufacturing 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$108,574,127	2.5%	Rank history: #3 in FY2022, #6 in FY2023, #24 in FY2024 and #23 in FY2025; up 4 since FY2020.
8	United Parcel Service Inc. Top NAICS codes 492110 Couriers and Express Delivery Services 481112 Scheduled Freight Air Transportation	$100,339,651	2.3%	Rank history: #12 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
9	Kbr, Inc. 4 awardees, including KBR Wyle Services, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541330 Engineering Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$99,476,964	2.3%	Rank history: #30 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
10	Crowley Government Services Inc. 2 awardees, including Crowley Logistics, Inc. Top NAICS codes 488510 Freight Transportation Arrangement 483111 Deep Sea Freight Transportation	$98,289,698	2.2%	Rank history: #2 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
11	Battelle Memorial Institute 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)	$82,260,344	1.9%	Rank history: #21 in FY2022, #28 in FY2023, #21 in FY2024 and #77 in FY2025; up 8 since FY2020.
12	Avantus Federal LLC Top NAICS codes 541219 Other Accounting Services 541330 Engineering Services	$77,228,312	1.7%	Rank history: #18 in FY2022, #18 in FY2023, #23 in FY2024 and not on the FY2025 list; up 5 since FY2020.
13	Science Applications International Corporation 4 awardees, including Engility Services, LLC Top NAICS codes 541330 Engineering Services 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)	$70,767,297	1.6%	Rank history: #25 in FY2022, #30 in FY2023, #18 in FY2024 and #19 in FY2025; unchanged since FY2020.
14	The Rand Corporation Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$66,997,095	1.5%	Rank history: #14 in FY2022, #14 in FY2023, #20 in FY2024 and #26 in FY2025; unchanged since FY2020.
15	The Boeing Company 6 awardees Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services	$56,057,861	1.3%	Rank history: #16 in FY2022, not on the FY2023–FY2024 lists and #73 in FY2025; down 3 since FY2020.
16	Logistics Management Institute 2 awardees, including The Tauri Group, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services	$48,302,023	1.1%	Rank history: #36 in FY2022, #43 in FY2023, #81 in FY2024 and #68 in FY2025; up 5 since FY2020.
17	Leidos Holdings, Inc. 10 awardees, including Leidos, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541930 Translation and Interpretation Services 541330 Engineering Services	$47,908,268	1.1%	Rank history: #17 in FY2022, #15 in FY2023, #15 in FY2024 and #22 in FY2025; up 8 since FY2020.
18	Mantech Tsg-2 Joint Venture Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$47,257,217	1.1%	Rank history: not on the FY2022–FY2023 lists, #89 in FY2024 and #46 in FY2025; up 27 since FY2020.
19	Lockheed Martin Corporation 7 awardees Top NAICS codes 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 561990 All Other Support Services	$46,766,548	1.1%	Rank history: #8 in FY2022, #7 in FY2023, not on the FY2024 list and #11 in FY2025; down 10 since FY2020.
20	Analytic Services Inc. 2 awardees, including Advanced Technology International Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$45,264,199	1.0%	Rank history: #15 in FY2022, #11 in FY2023, #14 in FY2024 and #1 in FY2025; up 4 since FY2020.
21	L3Harris Technologies, Inc. 5 awardees, including Fisica Applied Technologies, Inc., L3Harris Technologies Integrated Systems L.P. and CAE USA Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 331318 Other Aluminum Rolling, Drawing, and Extruding 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$41,515,544	0.9%	Rank history: #1 in FY2022, not on the FY2023–FY2024 lists and #59 in FY2025; up 13 since FY2020.
22	Lawrence Livermore National Security, LLC	$37,297,278	0.8%	Rank history: #29 in FY2022, not on the FY2023 list, #53 in FY2024 and #16 in FY2025; up 15 since FY2020.
23	General Dynamics Corporation 7 awardees, including General Dynamics Information Technology, Inc., Csra LLC and General Dynamics Mission Systems, Inc. Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services	$36,307,653	0.8%	Rank history: #19 in FY2022, #24 in FY2023, #29 in FY2024 and #37 in FY2025; down 7 since FY2020.
24	Systems Planning and Analysis, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541611 Administrative Management and General Management Consulting Services	$35,729,840	0.8%	Rank history: #27 in FY2022, #25 in FY2023, #28 in FY2024 and #32 in FY2025; up 25 since FY2020.
25	Atlas Air Worldwide Holdings Inc. 2 awardees, including Polar Air Cargo Worldwide, Inc. and Atlas Air, Inc. Top NAICS codes 492110 Couriers and Express Delivery Services 481112 Scheduled Freight Air Transportation	$35,563,286	0.8%	Rank history: #52 in FY2022, #72 in FY2023, #42 in FY2024 and #53 in FY2025; up 4 since FY2020.
26	York Space Systems LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$33,489,893	0.8%	Rank history: #11 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
27	H.i.g. Capital Management Inc. Through Empower AI, Inc. Top NAICS codes 541519 Other Computer Related Services	$32,690,222	0.7%	Rank history: #28 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
28	On Assignment, Inc. Through ECS Federal, LLC Top NAICS codes 541713 Research and Development in Nanotechnology	$32,303,584	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	National Air Cargo, Inc. Through National Air Cargo Group, Inc. Top NAICS codes 481112 Scheduled Freight Air Transportation	$29,163,160	0.7%	Rank history: #56 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; up 105 since FY2020.
30	MPF Federal, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$26,909,077	0.6%	Rank history: #53 in FY2022, #62 in FY2023, #91 in FY2024 and not on the FY2025 list; up 22 since FY2020.
31	American Systems Corporation 2 awardees Top NAICS codes 541330 Engineering Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541519 Other Computer Related Services	$26,239,259	0.6%	Rank history: #20 in FY2022, #17 in FY2023, #16 in FY2024 and #20 in FY2025; up 22 since FY2020.
32	Massachusetts Institute of Technology Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$24,752,164	0.6%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
33	Space Exploration Technologies Corp. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 481212 Nonscheduled Chartered Freight Air Transportation	$24,282,108	0.5%	Rank history: #7 in FY2022, #85 in FY2023, #34 in FY2024 and #38 in FY2025; new, not ranked in FY2020.
34	CACI International Inc. 6 awardees, including Caci, Inc. - Federal, Caci Nss, LLC and Caci Technologies, LLC Top NAICS codes 541512 Computer Systems Design Services 541990 All Other Professional, Scientific, and Technical Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$23,232,880	0.5%	Rank history: #32 in FY2022, #26 in FY2023, #31 in FY2024 and #25 in FY2025; down 7 since FY2020.
35	Strategic Analysis, Inc. Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services	$22,835,591	0.5%	Rank history: #63 in FY2022, not on the FY2023 list, #39 in FY2024 and #51 in FY2025; up 62 since FY2020.
36	Bwxt Advanced Technologies LLC	$22,500,000	0.5%	Rank history: not on the FY2022–FY2023 lists, #22 in FY2024 and not on the FY2025 list; up 20 since FY2020.
37	X Energy, LLC	$22,500,000	0.5%	Rank history: not on the FY2022 list, #63 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
38	Qbase, LLC Top NAICS codes 541519 Other Computer Related Services	$22,195,791	0.5%	Rank history: #42 in FY2022, #50 in FY2023, #49 in FY2024 and not on the FY2025 list; up 20 since FY2020.
39	Deloitte LLP 3 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541611 Administrative Management and General Management Consulting Services 541211 Offices of Certified Public Accountants	$21,805,063	0.5%	Rank history: #78 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2020.
40	University System of Maryland Through University of Maryland, College Park Top NAICS codes 611310 Colleges, Universities, and Professional Schools	$21,237,195	0.5%	Rank history: #91 in FY2022, #36 in FY2023, not on the FY2024 list and #67 in FY2025; up 6 since FY2020.
41	IAN Evan & Alexander Corp Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$21,215,208	0.5%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
42	Scientific Research Corporation Top NAICS codes 541330 Engineering Services 333318 Other Commercial and Service Industry Machinery Manufacturing 541990 All Other Professional, Scientific, and Technical Services	$21,197,501	0.5%	Rank history: #45 in FY2022, #33 in FY2023, #38 in FY2024 and #29 in FY2025; up 99 since FY2020.
43	Redhorse Corporation Top NAICS codes 611430 Professional and Management Development Training 541512 Computer Systems Design Services	$19,930,332	0.5%	Rank history: #54 in FY2022, not on the FY2023 list, #43 in FY2024 and #57 in FY2025; down 8 since FY2020.
44	Tecolote Research, Inc. Top NAICS codes 541519 Other Computer Related Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541512 Computer Systems Design Services	$18,780,722	0.4%	Rank history: #40 in FY2022, #37 in FY2023, #41 in FY2024 and #35 in FY2025; unchanged since FY2020.
45	Globalfoundries U.S. 2 LLC Top NAICS codes 334413 Semiconductor and Related Device Manufacturing	$18,700,000	0.4%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; up 56 since FY2020.
46	Western Global Airlines Inc. Top NAICS codes 481112 Scheduled Freight Air Transportation	$18,549,912	0.4%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 33 since FY2020.
47	Federal Express Corporation Top NAICS codes 492110 Couriers and Express Delivery Services 481112 Scheduled Freight Air Transportation	$18,279,938	0.4%	Rank history: not on the FY2022–FY2023 lists, #10 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
48	Aeyon LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$18,079,403	0.4%	Rank history: #49 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; up 108 since FY2020.
49	International Business Machines Corporation 3 awardees Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541611 Administrative Management and General Management Consulting Services	$17,607,152	0.4%	Rank history: #57 in FY2022, not on the FY2023–FY2024 lists and #66 in FY2025; down 11 since FY2020.
50	Anduril Industries, Inc.	$16,974,000	0.4%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
51	The Trustees of the Stevens Institute of Technology Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$16,833,388	0.4%	Rank history: #71 in FY2022, #29 in FY2023, #37 in FY2024 and #28 in FY2025; up 38 since FY2020.
52	Eccalon, LLC Top NAICS codes 334290 Other Communications Equipment Manufacturing	$16,672,838	0.4%	Rank history: #33 in FY2022, #52 in FY2023, #50 in FY2024 and #75 in FY2025; down 12 since FY2020.
53	Nana Regional Corporation Inc 7 awardees, including Cloud Lake Technology LLC, Lockwood Hills Federal LLC and Tuvli LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541611 Administrative Management and General Management Consulting Services 337127 Institutional Furniture Manufacturing	$15,811,988	0.4%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; down 12 since FY2020.
54	Convergent Solutions Inc. Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$15,577,761	0.4%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	Guidehouse Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541219 Other Accounting Services	$15,454,628	0.3%	Rank history: #44 in FY2022, #53 in FY2023, #36 in FY2024 and #69 in FY2025; up 64 since FY2020.
56	At&T Inc. 5 awardees, including Tyto Government Solutions Inc., At&T Mobility National Accounts LLC and At&T Enterprises, LLC Top NAICS codes 541511 Custom Computer Programming Services 541330 Engineering Services 517312 Wireless Telecommunications Carriers (except Satellite)	$15,160,602	0.3%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
57	Qualcomm Incorporated Through Qualcomm Technologies Inc.	$14,173,204	0.3%	Rank history: not on the FY2022–FY2025 lists; up 28 since FY2020.
58	Applied Research Associates, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541330 Engineering Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$14,036,914	0.3%	Rank history: #38 in FY2022, #34 in FY2023, #47 in FY2024 and #52 in FY2025; up 5 since FY2020.
59	Perspecta Inc. 2 awardees, including Peraton Technology Services Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$13,145,695	0.3%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
60	Suh'dutsing Contracting Services Top NAICS codes 541519 Other Computer Related Services	$12,203,196	0.3%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
61	Modern Technology Solutions, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$12,071,954	0.3%	Rank history: #59 in FY2022, #41 in FY2023, #46 in FY2024 and #33 in FY2025; up 15 since FY2020.
62	Georgia TECH Research Corp Through Georgia TECH Applied Research Corp 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) 339999 All Other Miscellaneous Manufacturing	$11,882,361	0.3%	Rank history: not on the FY2022 list, #48 in FY2023, not on the FY2024 list and #41 in FY2025; down 29 since FY2020.
63	Serco North America (Holdings) Inc 4 awardees, including Serco Inc. and Whitney Bradley & Brown, Inc. Top NAICS codes 541330 Engineering Services 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)	$11,689,204	0.3%	Rank history: not on the FY2022–FY2025 lists; up 84 since FY2020.
64	RTX Corporation 6 awardees, including Raytheon Company Top NAICS codes 541330 Engineering Services 811213 Communication Equipment Repair and Maintenance	$11,320,781	0.3%	Rank history: #35 in FY2022, #31 in FY2023, not on the FY2024 list and #45 in FY2025; down 49 since FY2020.
65	Tamimi Company Top NAICS codes 722310 Food Service Contractors	$11,033,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Hawaiian Holdings Inc Through Hawaiian Airlines, Inc. Top NAICS codes 481112 Scheduled Freight Air Transportation	$10,947,647	0.2%	Rank history: #46 in FY2022, #44 in FY2023, #73 in FY2024 and not on the FY2025 list; up 134 since FY2020.
67	HII Mission Technologies Corp Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$10,541,523	0.2%	Rank history: #22 in FY2022 and not on the FY2023–FY2025 lists; up 107 since FY2020.
68	The Texas A&M University System Through Texas A&M Engineering Experiment Station	$10,452,359	0.2%	Rank history: #37 in FY2022, #51 in FY2023, #95 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
69	Jab Innovative Solutions LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$10,433,919	0.2%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
70	Compqsoft, Inc. Top NAICS codes 541513 Computer Facilities Management Services	$10,408,892	0.2%	Rank history: #55 in FY2022, #91 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
71	Caci, Inc. - Federal Top NAICS codes 541512 Computer Systems Design Services	$10,365,669	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Koniag, Inc. 3 awardees, including Eagle Harbor Solutions LLC and Koniag Information Security Services LLC Top NAICS codes 541512 Computer Systems Design Services 541330 Engineering Services 541519 Other Computer Related Services	$10,019,522	0.2%	Rank history: #74 in FY2022, #88 in FY2023, not on the FY2024 list and #31 in FY2025; up 34 since FY2020.
73	Trussworks, Inc. Top NAICS codes 541512 Computer Systems Design Services	$9,479,457	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Advanced Technology Systems Inc. 2 awardees, including Salient Crgt, Inc. Top NAICS codes 541512 Computer Systems Design Services 541990 All Other Professional, Scientific, and Technical Services	$9,041,013	0.2%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
75	Accenture Federal Services LLC Top NAICS codes 541330 Engineering Services	$9,000,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Cybermedia Technologies, LLC Top NAICS codes 611710 Educational Support Services	$8,998,185	0.2%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; up 26 since FY2020.
77	BAE Systems PLC 5 awardees, including BAE Systems Controls Inc., BAE Systems Technology Solutions & Services Inc. and BAE Systems Information and Electronic Systems Integration Inc. Top NAICS codes 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 541519 Other Computer Related Services	$8,675,110	0.2%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; down 55 since FY2020.
78	Chesapeake Technology International, Corp. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$8,593,463	0.2%	Rank history: #61 in FY2022, #58 in FY2023, #59 in FY2024 and not on the FY2025 list; up 77 since FY2020.
79	Open San Consulting L.L.C. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$8,591,026	0.2%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
80	Booz Allen Hamilton 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 541330 Engineering Services	$8,498,551	0.2%	Rank history: not on the FY2022–FY2025 lists; down 50 since FY2020.
81	Sierra Nevada Company, LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 517919 All Other Telecommunications	$8,213,810	0.2%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
82	Metron Incorporated Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$8,008,837	0.2%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
83	Saltchuk Resources, Inc. 2 awardees, including Tote Services, LLC and Northern Air Cargo, LLC Top NAICS codes 483111 Deep Sea Freight Transportation 481112 Scheduled Freight Air Transportation	$7,943,575	0.2%	Rank history: not on the FY2022–FY2025 lists; up 283 since FY2020.
84	Koniag Management Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$7,789,934	0.2%	Rank history: #76 in FY2022, #78 in FY2023, #69 in FY2024 and not on the FY2025 list; up 80 since FY2020.
85	M2 Technology, Inc. Top NAICS codes 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$7,108,508	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Bytecubed, LLC 2 awardees, including Rock Creek Publishing Group Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541613 Marketing Consulting Services	$7,077,842	0.2%	Rank history: not on the FY2022–FY2025 lists; down 44 since FY2020.
87	Simis, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$6,935,543	0.2%	Rank history: not on the FY2022–FY2025 lists; up 83 since FY2020.
88	CSA Global LLC Top NAICS codes 541330 Engineering Services	$6,738,855	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
89	Next Tier Concepts Inc.	$6,691,290	0.2%	Rank history: not on the FY2022–FY2025 lists; up 72 since FY2020.
90	The Survice Engineering Company 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)	$6,649,511	0.2%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 45 since FY2020.
91	Command Post Technologies, Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services	$6,599,452	0.1%	Rank history: not on the FY2022–FY2025 lists; down 13 since FY2020.
92	Applied Information Sciences Inc. Top NAICS codes 541519 Other Computer Related Services	$6,544,473	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 16 since FY2020.
93	Barbaricum LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541511 Custom Computer Programming Services	$6,492,503	0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
94	Amerijet Holdings Inc. Through Amerijet International Inc. Top NAICS codes 481112 Scheduled Freight Air Transportation	$6,479,528	0.1%	Rank history: #50 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; up 165 since FY2020.
95	Amentum Services, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541330 Engineering Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$6,467,527	0.1%	Rank history: #34 in FY2022, #27 in FY2023, #30 in FY2024 and not on the FY2025 list; up 194 since FY2020.
96	Deloitte & Touche LLP Top NAICS codes 541211 Offices of Certified Public Accountants	$6,407,870	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Mckinsey & Company, Inc. Through Mckinsey & Company, Inc. Washington D.c. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541611 Administrative Management and General Management Consulting Services	$6,401,039	0.1%	Rank history: not on the FY2022–FY2025 lists; down 50 since FY2020.
98	Mymic LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541330 Engineering Services	$6,327,378	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
99	SES Government Solutions Inc. Through SES Space & Defense, Inc. Top NAICS codes 517410 Satellite Telecommunications	$6,264,002	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Abbott Laboratories 2 awardees, including Pembrooke Occupational Health, Inc. and Alere San Diego, Inc. Top NAICS codes 621511 Medical Laboratories 325413 In-Vitro Diagnostic Substance Manufacturing	$6,194,665	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.

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 $4.42 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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