Top 100 Department of Transportation Contractors, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Saltchuk Resources, Inc. 2 awardees, including Tote Services, LLC Top NAICS codes 336611 Ship Building and Repairing 541330 Engineering Services	$603,831,603	8.3%	Rank history: #2 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
2	L3Harris Technologies, Inc. 9 awardees, including Harris Corporation, Fisica Applied Technologies, Inc. and Stellant Systems Inc. Top NAICS codes 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 541512 Computer Systems Design Services 541330 Engineering Services	$420,721,831	5.8%	Rank history: #3 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
3	Leidos Holdings, Inc. 13 awardees, including Leidos, Inc. Top NAICS codes 488111 Air Traffic Control 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541512 Computer Systems Design Services	$337,078,295	4.6%	Rank history: #1 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since FY2020.
4	Science Applications International Corporation 5 awardees, including Engility Services, LLC and Halfaker and Associates, LLC Top NAICS codes 541330 Engineering Services 541513 Computer Facilities Management Services 541512 Computer Systems Design Services	$230,578,590	3.2%	Rank history: #4 in FY2022, #4 in FY2023, #4 in FY2024 and #3 in FY2025; up 1 since FY2020.
5	RTX Corporation 11 awardees, including Raytheon Company, Arinc Incorporated and Pratt & Whitney Engine Services, Inc. Top NAICS codes 541330 Engineering Services 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334111 Electronic Computer Manufacturing	$205,514,397	2.8%	Rank history: #5 in FY2022, #5 in FY2023, #5 in FY2024 and #4 in FY2025; up 8 since FY2020.
6	Parsons Corporation Through Parsons Government Services Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541330 Engineering Services	$185,221,035	2.5%	Rank history: #6 in FY2022, #20 in FY2023, #13 in FY2024 and #13 in FY2025; up 1 since FY2020.
7	The Mitre Corporation Top NAICS codes 541330 Engineering Services 541720 Research and Development in the Social Sciences and Humanities 561990 All Other Support Services	$173,743,895	2.4%	Rank history: #9 in FY2022, #6 in FY2023, #7 in FY2024 and #8 in FY2025; up 8 since FY2020.
8	General Dynamics Corporation 9 awardees, including General Dynamics Information Technology, Inc., General Dynamics Mission Systems, Inc. and Metro Machine Corp. Top NAICS codes 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 811213 Communication Equipment Repair and Maintenance	$164,180,954	2.3%	Rank history: #11 in FY2022, #8 in FY2023, #6 in FY2024 and #7 in FY2025; down 2 since FY2020.
9	LS Technologies LLC Top NAICS codes 541330 Engineering Services 541511 Custom Computer Programming Services	$133,966,842	1.8%	Rank history: #10 in FY2022, #9 in FY2023, #33 in FY2024 and not on the FY2025 list; unchanged since FY2020.
10	CDW Corporation Through CDW Government LLC Top NAICS codes 334111 Electronic Computer Manufacturing 541512 Computer Systems Design Services 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$123,619,818	1.7%	Rank history: #8 in FY2022, #7 in FY2023, #22 in FY2024 and not on the FY2025 list; up 1 since FY2020.
11	Kokosing Construction Company Inc. 2 awardees, including Construction Co Corman Kokosing Top NAICS codes 237310 Highway, Street, and Bridge Construction	$106,970,304	1.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Noblis, Inc. Top NAICS codes 541330 Engineering Services 541990 All Other Professional, Scientific, and Technical Services	$88,852,723	1.2%	Rank history: #13 in FY2022, #12 in FY2023, #11 in FY2024 and #14 in FY2025; down 2 since FY2020.
13	Karsun Solutions LLC Top NAICS codes 541519 Other Computer Related Services	$71,577,702	1.0%	Rank history: #19 in FY2022, #16 in FY2023, #17 in FY2024 and #17 in FY2025; up 6 since FY2020.
14	Robinson Aviation (Rva), Inc. Top NAICS codes 488111 Air Traffic Control	$65,742,590	0.9%	Rank history: #16 in FY2022, #15 in FY2023, #14 in FY2024 and #16 in FY2025; up 2 since FY2020.
15	Arctic Slope Regional Corporation 4 awardees, including Asrc Federal System Solutions LLC, Arctic Slope Technical Services, Inc. and Dz-Fdt, LLC Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services 237310 Highway, Street, and Bridge Construction	$65,479,795	0.9%	Rank history: #15 in FY2022, #21 in FY2023, #20 in FY2024 and #19 in FY2025; up 13 since FY2020.
16	Estes Bros. Const. Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$62,292,008	0.9%	Rank history: #28 in FY2022, #35 in FY2023, #23 in FY2024 and #34 in FY2025; up 71 since FY2020.
17	Stratacomm, LLC Top NAICS codes 541810 Advertising Agencies 541820 Public Relations Agencies	$60,607,739	0.8%	Rank history: #18 in FY2022, #17 in FY2023, #16 in FY2024 and #18 in FY2025; unchanged since FY2020.
18	Midwest Air Traffic Control Service Inc. Top NAICS codes 488111 Air Traffic Control	$54,158,147	0.7%	Rank history: #20 in FY2022, #19 in FY2023, #15 in FY2024 and #20 in FY2025; unchanged since FY2020.
19	Tetra Tech, Inc. 2 awardees, including Advanced Management Technology, Inc. and Tetra TECH MA, Inc. Top NAICS codes 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services	$50,813,526	0.7%	Rank history: #17 in FY2022, #26 in FY2023, #10 in FY2024 and #6 in FY2025; up 3 since FY2020.
20	Kbr, Inc. 3 awardees, including KBR Wyle Services, LLC Top NAICS codes 541519 Other Computer Related Services 561621 Security Systems Services (except Locksmiths)	$44,026,151	0.6%	Rank history: #43 in FY2022, #58 in FY2023, #82 in FY2024 and not on the FY2025 list; up 1 since FY2020.
21	Nuclear Ship Support Services LLC Top NAICS codes 562910 Remediation Services	$39,856,992	0.5%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
22	Dell Federal Systems L.P. 2 awardees Top NAICS codes 541519 Other Computer Related Services 511210 Software Publishers	$38,669,892	0.5%	Rank history: #21 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
23	American Civil Constructors LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction	$38,335,132	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
24	Serco North America (Holdings) Inc Through Serco Inc. Top NAICS codes 488111 Air Traffic Control	$35,298,465	0.5%	Rank history: #32 in FY2022, #37 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
25	Lockheed Martin Corporation 4 awardees, including Lockheed Martin Services, LLC, Zeta Associates Inc. and Lockheed Martin Coherent Technologies, Inc. Top NAICS codes 541330 Engineering Services 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334419 Other Electronic Component Manufacturing	$35,049,745	0.5%	Rank history: #39 in FY2022, #46 in FY2023, #42 in FY2024 and #52 in FY2025; up 8 since FY2020.
26	Veracity Engineering LLC Top NAICS codes 541330 Engineering Services	$32,273,064	0.4%	Rank history: #52 in FY2022, #33 in FY2023, #21 in FY2024 and #30 in FY2025; up 5 since FY2020.
27	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541611 Administrative Management and General Management Consulting Services 541330 Engineering Services	$32,133,626	0.4%	Rank history: #27 in FY2022, #31 in FY2023, #28 in FY2024 and #41 in FY2025; up 8 since FY2020.
28	Jacobs Engineering Group Inc. 6 awardees Top NAICS codes 541330 Engineering Services	$31,182,896	0.4%	Rank history: #66 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; up 61 since FY2020.
29	Ernst & Young LLP 2 awardees Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services 541211 Offices of Certified Public Accountants	$30,633,805	0.4%	Rank history: not on the FY2022–FY2025 lists; up 48 since FY2020.
30	Changeis, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541519 Other Computer Related Services 541611 Administrative Management and General Management Consulting Services	$30,554,449	0.4%	Rank history: #38 in FY2022, #39 in FY2023, #38 in FY2024 and #57 in FY2025; up 12 since FY2020.
31	Flintco LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$29,140,077	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
32	Spatial Front Inc. Top NAICS codes 541519 Other Computer Related Services 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$28,780,371	0.4%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
33	A3 Technology Inc. Top NAICS codes 541330 Engineering Services	$28,704,736	0.4%	Rank history: #47 in FY2022, #53 in FY2023, #39 in FY2024 and #49 in FY2025; up 4 since FY2020.
34	Concept Solutions LLC Top NAICS codes 541511 Custom Computer Programming Services 541990 All Other Professional, Scientific, and Technical Services	$26,142,882	0.4%	Rank history: #41 in FY2022, #25 in FY2023, #26 in FY2024 and #28 in FY2025; up 7 since FY2020.
35	Evans Incorporated Top NAICS codes 541330 Engineering Services	$23,444,521	0.3%	Rank history: #56 in FY2022, #68 in FY2023, #61 in FY2024 and #72 in FY2025; up 47 since FY2020.
36	Island Roads Corporation Top NAICS codes 237310 Highway, Street, and Bridge Construction	$23,423,772	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Digitalibiz, LLC Top NAICS codes 541330 Engineering Services	$23,187,620	0.3%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
38	Brasfield & Gorrie LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$21,985,924	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Oasis Systems, LLC Top NAICS codes 541330 Engineering Services	$20,671,615	0.3%	Rank history: #29 in FY2022, #27 in FY2023, #31 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
40	ICF International, Inc. 3 awardees, including ICF Incorporated, L.L.C. and Incentive Technology Group LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541513 Computer Facilities Management Services 541330 Engineering Services	$20,020,508	0.3%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
41	Halvik LLC 2 awardees Top NAICS codes 541511 Custom Computer Programming Services	$19,907,147	0.3%	Rank history: #57 in FY2022, #50 in FY2023, #47 in FY2024 and not on the FY2025 list; up 62 since FY2020.
42	Atac Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541512 Computer Systems Design Services 541330 Engineering Services	$19,807,129	0.3%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
43	Transportation Research Center Inc. Top NAICS codes 541380 Testing Laboratories and Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$19,409,807	0.3%	Rank history: #70 in FY2022, #40 in FY2023, #46 in FY2024 and #67 in FY2025; up 16 since FY2020.
44	Enroute Computer Solutions Inc. 2 awardees, including Sunhillo Technical Services Corp Top NAICS codes 541519 Other Computer Related Services	$19,173,279	0.3%	Rank history: #73 in FY2022, #73 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
45	Unisys Corporation Top NAICS codes 541513 Computer Facilities Management Services 323120 Support Activities for Printing 541519 Other Computer Related Services	$18,953,527	0.3%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
46	Bryant's Land and Development Industries, Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$18,867,485	0.3%	Rank history: #63 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 102 since FY2020.
47	Rigil Corporation Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541519 Other Computer Related Services 541219 Other Accounting Services	$18,860,080	0.3%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
48	Senture LLC Top NAICS codes 541519 Other Computer Related Services	$18,198,553	0.3%	Rank history: not on the FY2022–FY2023 lists, #53 in FY2024 and #50 in FY2025; up 59 since FY2020.
49	Wells Global, LLC Top NAICS codes 238210 Electrical Contractors and Other Wiring Installation Contractors 611519 Other Technical and Trade Schools	$17,758,566	0.2%	Rank history: #51 in FY2022, #24 in FY2023, #69 in FY2024 and #38 in FY2025; down 15 since FY2020.
50	Northrop Grumman Corporation 7 awardees, including Northrop Grumman Systems Corporation, Sonoma Photonics, Inc. and Park Air Systems Limited Top NAICS codes 811219 Other Electronic and Precision Equipment Repair and Maintenance 811213 Communication Equipment Repair and Maintenance 517919 All Other Telecommunications	$17,711,960	0.2%	Rank history: #93 in FY2022, #44 in FY2023, #65 in FY2024 and not on the FY2025 list; up 52 since FY2020.
51	Crestline Construction Company, L.L.C. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$17,390,562	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Morris Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$17,301,765	0.2%	Rank history: not on the FY2022–FY2025 lists; up 106 since FY2020.
53	Network Designs, Inc. Top NAICS codes 541511 Custom Computer Programming Services	$17,035,541	0.2%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
54	Microtechnologies LLC Top NAICS codes 541512 Computer Systems Design Services 517311 Wired Telecommunications Carriers 541519 Other Computer Related Services	$16,602,227	0.2%	Rank history: #59 in FY2022, #52 in FY2023, #36 in FY2024 and #43 in FY2025; up 30 since FY2020.
55	JMA Solutions LLC Top NAICS codes 541330 Engineering Services 541511 Custom Computer Programming Services	$16,518,202	0.2%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; down 15 since FY2020.
56	Advanced Sciences and Technologies, LLC Top NAICS codes 541330 Engineering Services 511210 Software Publishers	$16,316,391	0.2%	Rank history: #96 in FY2022, #88 in FY2023, #97 in FY2024 and not on the FY2025 list; up 13 since FY2020.
57	Interwest Construction, Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$15,509,654	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Herback General Engineering LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction	$15,396,605	0.2%	Rank history: not on the FY2022 list, #45 in FY2023 and not on the FY2024–FY2025 lists; down 13 since FY2020.
59	Caribbean Sign Supply, Inc. Through Caribbean Sign Supplies Manufacturers, Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$15,347,552	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Harris Corporation	$15,321,749	0.2%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; down 57 since FY2020.
61	Bering Straits Native Corporation 2 awardees, including Bering Global Solutions, LLC and Bering Straits Development Co. Top NAICS codes 561612 Security Guards and Patrol Services 237310 Highway, Street, and Bridge Construction	$15,281,924	0.2%	Rank history: #78 in FY2022, #77 in FY2023, not on the FY2024 list and #75 in FY2025; up 5 since FY2020.
62	Groundswell Corporation Top NAICS codes 541512 Computer Systems Design Services	$15,101,598	0.2%	Rank history: #60 in FY2022, not on the FY2023 list, #52 in FY2024 and #68 in FY2025; up 47 since FY2020.
63	Alliant Insurance Services, Inc. Top NAICS codes 524210 Insurance Agencies and Brokerages 524298 All Other Insurance Related Activities	$14,875,298	0.2%	Rank history: #85 in FY2022, not on the FY2023 list, #64 in FY2024 and #91 in FY2025; up 48 since FY2020.
64	Ensco Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$14,448,855	0.2%	Rank history: #79 in FY2022, #32 in FY2023, #51 in FY2024 and #45 in FY2025; down 3 since FY2020.
65	Cssi, LLC Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541330 Engineering Services	$14,421,019	0.2%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 40 since FY2020.
66	Business Integra Technology Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$14,400,844	0.2%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.
67	ISS Facility Services Holding Inc. Top NAICS codes 561210 Facilities Support Services	$13,999,566	0.2%	Rank history: not on the FY2022–FY2025 lists; up 187 since FY2020.
68	H.i.g. Capital Management Inc. 2 awardees, including Iron Bow Technologies, LLC and Symplicity Corporation Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services 517911 Telecommunications Resellers	$13,656,688	0.2%	Rank history: #35 in FY2022, #36 in FY2023, #55 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
69	Schneider Electric Buildings Americas Inc. 4 awardees, including Schneider Electric Usa, Inc. and Schneider Electric Federal, Inc. Top NAICS codes 335311 Power, Distribution, and Specialty Transformer Manufacturing 541330 Engineering Services 236220 Commercial and Institutional Building Construction	$13,230,593	0.2%	Rank history: not on the FY2022–FY2025 lists; up 87 since FY2020.
70	Jas.w. Glover, Ltd. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$13,208,100	0.2%	Rank history: not on the FY2022–FY2025 lists; up 203 since FY2020.
71	Eaton Corporation 3 awardees Top NAICS codes 335999 All Other Miscellaneous Electrical Equipment and Component Manufacturing 811219 Other Electronic and Precision Equipment Repair and Maintenance 335311 Power, Distribution, and Specialty Transformer Manufacturing	$13,006,854	0.2%	Rank history: #89 in FY2022, #92 in FY2023, not on the FY2024 list and #82 in FY2025; up 52 since FY2020.
72	Red River Technology LLC 2 awardees, including Distributed Technology Group LLC Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services	$12,983,971	0.2%	Rank history: #42 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; up 70 since FY2020.
73	The Walsh Group 3 awardees, including Archer Western Construction LLC, Walsh Construction Company II, LLC and Archer Western Contractors, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 236210 Industrial Building Construction	$12,978,874	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Allen Corporation of America, Inc. Top NAICS codes 611512 Flight Training	$12,832,565	0.2%	Rank history: not on the FY2022 list, #90 in FY2023 and not on the FY2024–FY2025 lists; up 18 since FY2020.
75	Toxcel LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541720 Research and Development in the Social Sciences and Humanities 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)	$12,802,108	0.2%	Rank history: not on the FY2022–FY2025 lists; up 221 since FY2020.
76	Caribe Tecno CRL Top NAICS codes 237310 Highway, Street, and Bridge Construction	$12,321,967	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	AECOM 5 awardees, including AECOM Technical Services, Inc., Amentum Technical Services LLC and Amentum Environment & Energy, Inc. Top NAICS codes 541330 Engineering Services 562910 Remediation Services 561720 Janitorial Services	$12,296,869	0.2%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; down 22 since FY2020.
78	Accenture Federal Services LLC 2 awardees Top NAICS codes 541512 Computer Systems Design Services	$12,079,810	0.2%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
79	Conway Construction Co Top NAICS codes 237310 Highway, Street, and Bridge Construction	$12,055,344	0.2%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; up 156 since FY2020.
80	Nagan Construction Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$11,955,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Integrated Financial Analysts Ltd. Top NAICS codes 541511 Custom Computer Programming Services	$11,951,612	0.2%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
82	At&T Inc. 7 awardees, including At&T Enterprises, LLC, Att Mobility LLC and At&T Technical Services Company, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers 541519 Other Computer Related Services 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing	$11,857,754	0.2%	Rank history: #62 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 279 since FY2020.
83	The Ibex Group Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$11,659,335	0.2%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
84	Kohler Co. Top NAICS codes 335312 Motor and Generator Manufacturing	$11,608,277	0.2%	Rank history: #37 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
85	Globe Construction Company Top NAICS codes 236220 Commercial and Institutional Building Construction	$11,604,551	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	KLD Associates Inc. Top NAICS codes 541910 Marketing Research and Public Opinion Polling 541990 All Other Professional, Scientific, and Technical Services	$11,281,623	0.2%	Rank history: #65 in FY2022, #49 in FY2023, #40 in FY2024 and #53 in FY2025; down 18 since FY2020.
87	Verizon Communications Inc. 2 awardees, including Cellco Partnership and Verizon Federal Inc. Top NAICS codes 541519 Other Computer Related Services 517312 Wireless Telecommunications Carriers (except Satellite) 517110 Wired Telecommunications Carriers	$11,010,381	0.2%	Rank history: not on the FY2022 list, #23 in FY2023 and not on the FY2024–FY2025 lists; up 64 since FY2020.
88	Guidehouse Inc. 2 awardees Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$10,973,428	0.2%	Rank history: #44 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
89	Marick Group LLC Top NAICS codes 611430 Professional and Management Development Training	$10,726,709	0.1%	Rank history: not on the FY2022–FY2025 lists; up 129 since FY2020.
90	Iron Bow Technologies, LLC Top NAICS codes 334111 Electronic Computer Manufacturing 517911 Telecommunications Resellers 541519 Other Computer Related Services	$10,721,205	0.1%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
91	Laforge & Budd Construction Co Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$10,710,730	0.1%	Rank history: not on the FY2022–FY2025 lists; up 79 since FY2020.
92	Jita Contracting, Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction	$10,538,704	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Avantus Federal LLC Top NAICS codes 541519 Other Computer Related Services	$10,401,356	0.1%	Rank history: not on the FY2022 list, #81 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
94	Rivertech LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$10,375,855	0.1%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; down 32 since FY2020.
95	Diversified Management Solutions, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$10,374,638	0.1%	Rank history: not on the FY2022–FY2023 lists, #100 in FY2024 and #87 in FY2025; up 6 since FY2020.
96	Objectstream Inc. Top NAICS codes 541512 Computer Systems Design Services	$10,343,907	0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
97	Virginia Polytechnic Institute & State University Top NAICS codes 541380 Testing Laboratories and Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541990 All Other Professional, Scientific, and Technical Services	$10,295,545	0.1%	Rank history: not on the FY2022–FY2025 lists; up 35 since FY2020.
98	Honeywell International Inc. 9 awardees Top NAICS codes 541330 Engineering Services 236220 Commercial and Institutional Building Construction 561210 Facilities Support Services	$10,272,527	0.1%	Rank history: #22 in FY2022, not on the FY2023–FY2024 lists and #26 in FY2025; down 73 since FY2020.
99	Association of American Railroads 2 awardees, including Transportation Technology Center, Inc. and Railinc Corp Top NAICS codes 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 511210 Software Publishers	$10,235,162	0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
100	Unicare Building Maintenance, Inc. Top NAICS codes 561720 Janitorial Services 561210 Facilities Support Services	$10,216,807	0.1%	Rank history: not on the FY2022–FY2025 lists; up 44 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 $7.27 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.

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