Top 100 Department of the Interior Contractors, Jul 2025–Jun 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	NW Construction, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$215,670,745	4.2%	Rank history: not on the FY2021 list, #2 in FY2022, #9 in FY2023, #5 in FY2024 and #1 in FY2025; up 4 since Jul 2024–Jun 2025.
2	Ames Construction, Inc. 2 awardees, including Ames Federal Contracting Group LLC Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 237990 Other Heavy and Civil Engineering Construction	$133,485,351	2.6%	Rank history: #15 in FY2021, #25 in FY2022, not on the FY2023–FY2024 lists and #4 in FY2025; new, not ranked in Jul 2024–Jun 2025.
3	Record Steel and Construction, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$130,136,932	2.5%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023–FY2024 lists and #9 in FY2025; up 9 since Jul 2024–Jun 2025.
4	G.s.e. Construction Company, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$109,487,800	2.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
5	Tepa EC, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 238990 All Other Specialty Trade Contractors	$106,403,896	2.1%	Rank history: not on the FY2021 list, #3 in FY2022, not on the FY2023 list, #2 in FY2024 and #5 in FY2025; down 1 since Jul 2024–Jun 2025.
6	Kiewit Infrastructure West Co. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$103,326,569	2.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
7	Greenberry Industrial LLC 2 awardees, including Olsson Industrial Electric, Inc. Top NAICS codes 237130 Power and Communication Line and Related Structures Construction 332312 Fabricated Structural Metal Manufacturing	$69,896,262	1.3%	Rank history: not on the FY2021–FY2025 lists; up 478 since Jul 2024–Jun 2025.
8	Lumen Technologies, Inc. 7 awardees, including Lumen Technologies Government Solutions, Inc., Centurylink Communications, LLC and Centurytel of Eagle Inc. Top NAICS codes 517110 Wired Telecommunications Carriers 517810 All Other Telecommunications 517111 Wired Telecommunications Carriers	$67,439,825	1.3%	Rank history: #23 in FY2021, not on the FY2022 list, #52 in FY2023, #18 in FY2024 and #12 in FY2025; new, not ranked in Jul 2024–Jun 2025.
9	Perimeter Solutions LP Top NAICS codes 325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing	$63,849,997	1.2%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #7 in FY2025; unchanged since Jul 2024–Jun 2025.
10	Terra Site Constructors LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction 237310 Highway, Street, and Bridge Construction	$61,379,143	1.2%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and not on the FY2025 list; up 148 since Jul 2024–Jun 2025.
11	Accenture Federal Services LLC Top NAICS codes 541519 Other Computer Related Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541511 Custom Computer Programming Services	$53,740,707	1.0%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #8 in FY2025; unchanged since Jul 2024–Jun 2025.
12	Stone & Lime Imports, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 236220 Commercial and Institutional Building Construction	$51,204,368	1.0%	Rank history: #82 in FY2021, #41 in FY2022, #25 in FY2023, not on the FY2024 list and #29 in FY2025; up 24 since Jul 2024–Jun 2025.
13	Tutor Perini Corporation 2 awardees, including Perini Management Services, Inc. and Fisk Electric Company Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 236220 Commercial and Institutional Building Construction 238210 Electrical Contractors and Other Wiring Installation Contractors	$43,821,188	0.8%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; up 412 since Jul 2024–Jun 2025.
14	RJS Construction, Inc. 3 awardees Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction 237310 Highway, Street, and Bridge Construction	$42,181,256	0.8%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; up 222 since Jul 2024–Jun 2025.
15	Kbr, Inc. 3 awardees, including KBR Wyle Services, LLC Top NAICS codes 541513 Computer Facilities Management Services 811219 Other Electronic and Precision Equipment Repair and Maintenance	$41,813,332	0.8%	Rank history: #2 in FY2021, #6 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
16	Bairco Construction Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 221320 Sewage Treatment Facilities 236220 Commercial and Institutional Building Construction	$38,000,074	0.7%	Rank history: #45 in FY2021, not on the FY2022–FY2023 lists, #88 in FY2024 and #55 in FY2025; up 78 since Jul 2024–Jun 2025.
17	Planet Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$37,102,507	0.7%	Rank history: #48 in FY2021, #17 in FY2022, #15 in FY2023, #12 in FY2024 and #14 in FY2025; up 1 since Jul 2024–Jun 2025.
18	NV5 Global, Inc. 2 awardees, including NV5 Geospatial, Inc. and Geographic Information Services, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541370 Surveying and Mapping (except Geophysical) Services 541519 Other Computer Related Services	$35,212,447	0.7%	Rank history: #8 in FY2021, #10 in FY2022, #12 in FY2023, not on the FY2024 list and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
19	Medvolt - Roundhouse JV Top NAICS codes 236220 Commercial and Institutional Building Construction	$34,323,745	0.7%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; new, not ranked in Jul 2024–Jun 2025.
20	KBR Wyle Services LLC 3 awardees Top NAICS codes 541513 Computer Facilities Management Services 541330 Engineering Services 811219 Other Electronic and Precision Equipment Repair and Maintenance	$30,688,791	0.6%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #13 in FY2025; down 10 since Jul 2024–Jun 2025.
21	Promethean Operating I LLC Top NAICS codes 213112 Support Activities for Oil and Gas Operations	$30,121,961	0.6%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and #59 in FY2025; up 467 since Jul 2024–Jun 2025.
22	Guardian Construction, Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction 237110 Water and Sewer Line and Related Structures Construction 236220 Commercial and Institutional Building Construction	$29,874,783	0.6%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023, not on the FY2024 list and #24 in FY2025; up 5 since Jul 2024–Jun 2025.
23	CDM Smith Inc. 3 awardees, including CDM Constructors Inc. and CDM Federal Programs Corporation Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 541330 Engineering Services	$29,131,081	0.6%	Rank history: #1 in FY2021, not on the FY2022–FY2024 lists and #6 in FY2025; new, not ranked in Jul 2024–Jun 2025.
24	Woolpert, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541519 Other Computer Related Services	$29,092,168	0.6%	Rank history: #53 in FY2021, #30 in FY2022, #79 in FY2023, #15 in FY2024 and #31 in FY2025; up 4 since Jul 2024–Jun 2025.
25	Dell Technologies Inc. 2 awardees, including Dell Federal Systems L.P Top NAICS codes 511210 Software Publishers	$28,290,426	0.5%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #17 in FY2025; down 5 since Jul 2024–Jun 2025.
26	CACI International Inc. 2 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top NAICS codes 541519 Other Computer Related Services	$27,293,052	0.5%	Rank history: #20 in FY2021, not on the FY2022 list, #28 in FY2023, #41 in FY2024 and #37 in FY2025; up 6 since Jul 2024–Jun 2025.
27	The Chenega Corporation 9 awardees, including Chenega Professional & Technical Services LLC, Cyberstar LLC and Chenega Naswik International LLC Top NAICS codes 541511 Custom Computer Programming Services 541519 Other Computer Related Services 561612 Security Guards and Patrol Services	$27,131,156	0.5%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Jul 2024–Jun 2025.
28	Verizon 11 awardees, including Verizon Business Network Services LLC, Cellco Partnership and Frontier Communications of America, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers 517312 Wireless Telecommunications Carriers (except Satellite) 517111 Wired Telecommunications Carriers	$26,755,622	0.5%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #35 in FY2025; up 17 since Jul 2024–Jun 2025.
29	Bristow Group Inc. Through Bristow LLC Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation	$26,034,027	0.5%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #21 in FY2025; down 8 since Jul 2024–Jun 2025.
30	Countertrade Products, Inc. Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services 221114 Solar Electric Power Generation	$25,565,004	0.5%	Rank history: #13 in FY2021, #11 in FY2022, #13 in FY2023, #11 in FY2024 and #28 in FY2025; down 11 since Jul 2024–Jun 2025.
31	Mckenzie Construction & Site Development LLC 2 awardees Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 237310 Highway, Street, and Bridge Construction 238220 Plumbing, Heating, and Air-Conditioning Contractors	$23,581,963	0.5%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; up 441 since Jul 2024–Jun 2025.
32	Science Applications International Corporation 2 awardees Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541512 Computer Systems Design Services	$23,401,309	0.5%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and #27 in FY2025; up 3 since Jul 2024–Jun 2025.
33	Fugro USA Land, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$23,250,395	0.4%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and #61 in FY2025; up 19 since Jul 2024–Jun 2025.
34	The Aleut Corporation Through Aleut Construction LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 237310 Highway, Street, and Bridge Construction	$23,144,668	0.4%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023, not on the FY2024 list and #42 in FY2025; new, not ranked in Jul 2024–Jun 2025.
35	Jacobs Engineering Group Inc. 6 awardees, including Jacobs Government Services Company, Jacobs Project Management Co. and Ch2M Hill, Inc. Top NAICS codes 541330 Engineering Services 237110 Water and Sewer Line and Related Structures Construction 541611 Administrative Management and General Management Consulting Services	$21,618,316	0.4%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #3 in FY2025; down 34 since Jul 2024–Jun 2025.
36	Sealaska Constructors LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 236118 Residential Remodelers	$20,237,448	0.4%	Rank history: not on the FY2021–FY2023 lists, #48 in FY2024 and #20 in FY2025; up 3 since Jul 2024–Jun 2025.
37	Bridger Aerospace Group, LLC Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation	$20,121,843	0.4%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 69 since Jul 2024–Jun 2025.
38	Apex Companies, LLC 2 awardees, including Forsgren Associates Inc. Top NAICS codes 541330 Engineering Services 221310 Water Supply and Irrigation Systems	$19,887,211	0.4%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; new, not ranked in Jul 2024–Jun 2025.
39	Centerre Construction, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$19,214,964	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
40	Orcom a Division of Ortega Companies Inc Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 236116 New Multifamily Housing Construction (except For-Sale Builders) 236220 Commercial and Institutional Building Construction	$19,040,903	0.4%	Rank history: not on the FY2021–FY2023 lists, #81 in FY2024 and not on the FY2025 list; up 48 since Jul 2024–Jun 2025.
41	A&R Pacific-Garney Federal JV II Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$19,039,200	0.4%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Jul 2024–Jun 2025.
42	Arctic Slope Regional Corporation 6 awardees, including Asrc Consulting & Environmental Services, LLC, Vistronix, LLC and Broadleaf, Inc. Top NAICS codes 213112 Support Activities for Oil and Gas Operations 541519 Other Computer Related Services 541512 Computer Systems Design Services	$18,375,003	0.4%	Rank history: #5 in FY2021, #33 in FY2022, #40 in FY2023, #68 in FY2024 and #18 in FY2025; up 33 since Jul 2024–Jun 2025.
43	SNF Inc. Top NAICS codes 336992 Military Armored Vehicle, Tank, and Tank Component Manufacturing 336211 Motor Vehicle Body Manufacturing 336120 Heavy Duty Truck Manufacturing	$18,358,709	0.4%	Rank history: not on the FY2021–FY2023 lists, #45 in FY2024 and #22 in FY2025; up 33 since Jul 2024–Jun 2025.
44	Great Lakes Dredge & Dock Corporation Through Forgen LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$18,014,447	0.3%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; new, not ranked in Jul 2024–Jun 2025.
45	Peraton Inc. 2 awardees, including Peraton Enterprise Solutions LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541519 Other Computer Related Services	$17,595,721	0.3%	Rank history: not on the FY2021–FY2023 lists, #60 in FY2024 and #16 in FY2025; down 16 since Jul 2024–Jun 2025.
46	Dofine Sprinkler Rebuilders Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 236220 Commercial and Institutional Building Construction 238110 Poured Concrete Foundation and Structure Contractors	$16,525,336	0.3%	Rank history: not on the FY2021–FY2025 lists; up 233 since Jul 2024–Jun 2025.
47	General Dynamics Corporation 3 awardees, including General Dynamics Mission Systems, Inc. and General Dynamics Information Technology, Inc. Top NAICS codes 541330 Engineering Services 541512 Computer Systems Design Services 541519 Other Computer Related Services	$16,228,220	0.3%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, #36 in FY2024 and #64 in FY2025; down 6 since Jul 2024–Jun 2025.
48	RBA Engineering International, PLLC Top NAICS codes 237310 Highway, Street, and Bridge Construction	$16,197,004	0.3%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; new, not ranked in Jul 2024–Jun 2025.
49	Nexgen Technologies Inc. Top NAICS codes 541513 Computer Facilities Management Services 541511 Custom Computer Programming Services	$16,144,426	0.3%	Rank history: #42 in FY2021, #40 in FY2022, #51 in FY2023, #51 in FY2024 and #60 in FY2025; up 2 since Jul 2024–Jun 2025.
50	Michels Corp Through Michels Construction, Inc. Top NAICS codes 237130 Power and Communication Line and Related Structures Construction	$16,131,236	0.3%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Jul 2024–Jun 2025.
51	Lacy Mechanical Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$15,841,281	0.3%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #50 in FY2025; up 23 since Jul 2024–Jun 2025.
52	Henrys Aerial Service Inc. Top NAICS codes 115310 Support Activities for Forestry	$15,654,255	0.3%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; up 57 since Jul 2024–Jun 2025.
53	Colossal Contracting LLC Top NAICS codes 541519 Other Computer Related Services 334112 Computer Storage Device Manufacturing	$14,991,850	0.3%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023, #95 in FY2024 and #79 in FY2025; up 36 since Jul 2024–Jun 2025.
54	Merrick-Surdex Joint Venture LLP Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$14,443,843	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #62 in FY2023, #78 in FY2024 and #44 in FY2025; up 25 since Jul 2024–Jun 2025.
55	Hpm, Inc. Top NAICS codes 236116 New Multifamily Housing Construction (except For-Sale Builders) 236117 New Housing For-Sale Builders	$14,219,376	0.3%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023, not on the FY2024 list and #51 in FY2025; up 396 since Jul 2024–Jun 2025.
56	Ciri Development Corporation 4 awardees, including North Wind General Contractors LLC, North Wind Resource Consulting LLC and North Wind Federal Services, LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 562910 Remediation Services 541620 Environmental Consulting Services	$14,208,074	0.3%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023, not on the FY2024 list and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
57	Atlantic Industrial Coatings Limited Liability Company Top NAICS codes 238390 Other Building Finishing Contractors	$14,191,478	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
58	Cox Construction Co Top NAICS codes 236220 Commercial and Institutional Building Construction	$14,169,000	0.3%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
59	Western Pilot Service Inc. Top NAICS codes 115310 Support Activities for Forestry	$14,161,397	0.3%	Rank history: #70 in FY2021, not on the FY2022–FY2023 lists, #72 in FY2024 and #47 in FY2025; down 9 since Jul 2024–Jun 2025.
60	AECOM 5 awardees, including AECOM Technical Services, Inc., Environmental Management & Planning Solutions LLC and AECOM Services, LLC Top NAICS codes 541330 Engineering Services 541620 Environmental Consulting Services 541310 Architectural Services	$13,798,991	0.3%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023, #89 in FY2024 and #76 in FY2025; up 26 since Jul 2024–Jun 2025.
61	Environmental Systems Research Institute, Inc. 2 awardees, including Esri Global Inc. Top NAICS codes 511210 Software Publishers 611420 Computer Training 541370 Surveying and Mapping (except Geophysical) Services	$13,135,252	0.3%	Rank history: #65 in FY2021, #74 in FY2022, not on the FY2023 list, #59 in FY2024 and #82 in FY2025; up 20 since Jul 2024–Jun 2025.
62	Bighorn Airways Inc. Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation 115310 Support Activities for Forestry	$12,949,907	0.2%	Rank history: #75 in FY2021 and not on the FY2022–FY2025 lists; up 53 since Jul 2024–Jun 2025.
63	Bookcliff Partners, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$12,867,313	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
64	Fletcher Flying Service Inc Top NAICS codes 115310 Support Activities for Forestry	$12,834,249	0.2%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; up 46 since Jul 2024–Jun 2025.
65	Nuaxis LLC Top NAICS codes 541519 Other Computer Related Services	$12,808,032	0.2%	Rank history: #19 in FY2021, #31 in FY2022, #48 in FY2023, #22 in FY2024 and #63 in FY2025; down 21 since Jul 2024–Jun 2025.
66	Co Fire Aviation, Inc. Top NAICS codes 115310 Support Activities for Forestry	$12,796,222	0.2%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; down 8 since Jul 2024–Jun 2025.
67	Ritz Construction Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 236210 Industrial Building Construction 237110 Water and Sewer Line and Related Structures Construction	$12,781,343	0.2%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and #71 in FY2025; up 100 since Jul 2024–Jun 2025.
68	Aero Spray Inc. Top NAICS codes 115310 Support Activities for Forestry	$12,546,426	0.2%	Rank history: #29 in FY2021, not on the FY2022–FY2023 lists, #77 in FY2024 and #87 in FY2025; unchanged since Jul 2024–Jun 2025.
69	Software Information Resource Corp Top NAICS codes 513210 Software Publishers 541519 Other Computer Related Services	$12,099,838	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023, #69 in FY2024 and #80 in FY2025; up 4 since Jul 2024–Jun 2025.
70	Hdr, Inc. 6 awardees, including HDR Engineering, Inc., HDR Schnabel Reclamation Joint Venture and HDR MN NPS JV Top NAICS codes 541330 Engineering Services 541310 Architectural Services	$11,947,255	0.2%	Rank history: #43 in FY2021, #18 in FY2022, #30 in FY2023, #35 in FY2024 and #74 in FY2025; down 21 since Jul 2024–Jun 2025.
71	The Timken Company Through CGI Federal Inc. Top NAICS codes 541511 Custom Computer Programming Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$11,914,749	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
72	Cherokee Nation 10 awardees, including Cherokee Nation Integrated Health, L.L.C., Cherokee United Services, L.L.C. and Cherokee Nation System Solutions LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541519 Other Computer Related Services 541611 Administrative Management and General Management Consulting Services	$11,829,627	0.2%	Rank history: #6 in FY2021, #14 in FY2022, #2 in FY2023, not on the FY2024 list and #78 in FY2025; new, not ranked in Jul 2024–Jun 2025.
73	Hartman-Walsh Corp Through Hartman-Walsh Painting Company Top NAICS codes 238320 Painting and Wall Covering Contractors 237990 Other Heavy and Civil Engineering Construction 237110 Water and Sewer Line and Related Structures Construction	$11,527,829	0.2%	Rank history: not on the FY2021 list, #89 in FY2022, #82 in FY2023, #39 in FY2024 and #30 in FY2025; down 30 since Jul 2024–Jun 2025.
74	VF Imagewear, Inc. Through Workwear Outfitters, LLC Top NAICS codes 315210 Cut and Sew Apparel Contractors	$11,283,435	0.2%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; up 34 since Jul 2024–Jun 2025.
75	Palouse Power LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 237130 Power and Communication Line and Related Structures Construction	$11,024,239	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
76	Wright Bros LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$10,920,889	0.2%	Rank history: not on the FY2021–FY2024 lists and #94 in FY2025; new, not ranked in Jul 2024–Jun 2025.
77	Koniag, Inc. 4 awardees, including Tuknik Government Services LLC, Kadiak LLC and Koniag Emerging Technologies LLC Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services 541511 Custom Computer Programming Services	$10,812,969	0.2%	Rank history: not on the FY2021 list, #69 in FY2022, #53 in FY2023, not on the FY2024 list and #95 in FY2025; new, not ranked in Jul 2024–Jun 2025.
78	Garco Construction, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$10,626,477	0.2%	Rank history: #27 in FY2021, #38 in FY2022, #42 in FY2023, #50 in FY2024 and #32 in FY2025; down 54 since Jul 2024–Jun 2025.
79	National Contracting Services LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 236116 New Multifamily Housing Construction (except For-Sale Builders) 238210 Electrical Contractors and Other Wiring Installation Contractors	$10,530,606	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
80	Ecodata Analytics LLC Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541511 Custom Computer Programming Services	$10,453,783	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
81	Randy Kinder Excavating Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$10,451,463	0.2%	Rank history: not on the FY2021–FY2025 lists; up 338 since Jul 2024–Jun 2025.
82	Stantec Inc. Through Stantec Consulting Services Inc. Top NAICS codes 541620 Environmental Consulting Services 541330 Engineering Services 541690 Other Scientific and Technical Consulting Services	$10,401,175	0.2%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023, #64 in FY2024 and #68 in FY2025; down 20 since Jul 2024–Jun 2025.
83	Inalab Consulting Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541511 Custom Computer Programming Services	$10,385,875	0.2%	Rank history: not on the FY2021–FY2025 lists; up 193 since Jul 2024–Jun 2025.
84	Nana Regional Corporation, Inc. 5 awardees, including Affigent, LLC and Arctic Peak LLC Top NAICS codes 541519 Other Computer Related Services 541990 All Other Professional, Scientific, and Technical Services 237110 Water and Sewer Line and Related Structures Construction	$10,346,770	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
85	Boedeker Flying Service, Inc. Top NAICS codes 115310 Support Activities for Forestry	$10,345,567	0.2%	Rank history: not on the FY2021–FY2025 lists; up 143 since Jul 2024–Jun 2025.
86	Stgp Malcolm JV LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$10,265,327	0.2%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Jul 2024–Jun 2025.
87	Nationwide It Services Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services	$10,106,012	0.2%	Rank history: #73 in FY2021, #34 in FY2022, #46 in FY2023, #37 in FY2024 and #57 in FY2025; down 33 since Jul 2024–Jun 2025.
88	Northern Management Services, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction	$10,089,264	0.2%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 59 since Jul 2024–Jun 2025.
89	Federal Contracts LLC Top NAICS codes 336112 Light Truck and Utility Vehicle Manufacturing 333120 Construction Machinery Manufacturing 333111 Farm Machinery and Equipment Manufacturing	$10,004,873	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #77 in FY2023, #87 in FY2024 and not on the FY2025 list; up 2 since Jul 2024–Jun 2025.
90	Outside Box LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 238990 All Other Specialty Trade Contractors	$9,928,855	0.2%	Rank history: not on the FY2021–FY2024 lists and #62 in FY2025; up 105 since Jul 2024–Jun 2025.
91	Custom Lawn Service, Inc. Top NAICS codes 561730 Landscaping Services 562910 Remediation Services 561210 Facilities Support Services	$9,877,148	0.2%	Rank history: not on the FY2021–FY2025 lists; up 115 since Jul 2024–Jun 2025.
92	Diversified Construction of Oklahoma, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$9,639,592	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	Dewberry Engineers Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541620 Environmental Consulting Services	$9,436,044	0.2%	Rank history: not on the FY2021–FY2023 lists, #26 in FY2024 and #45 in FY2025; down 56 since Jul 2024–Jun 2025.
94	Brainerd Helicopters, Inc. Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation 488190 Other Support Activities for Air Transportation	$9,259,330	0.2%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 17 since Jul 2024–Jun 2025.
95	Project Solutions, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$9,034,761	0.2%	Rank history: not on the FY2021–FY2024 lists and #93 in FY2025; up 26 since Jul 2024–Jun 2025.
96	Burke Electric, L.L.C. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$8,914,411	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
97	Hess Contracting LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$8,843,470	0.2%	Rank history: #72 in FY2021 and not on the FY2022–FY2025 lists; up 241 since Jul 2024–Jun 2025.
98	Makpar-Nuaxis JV LLC Top NAICS codes 541519 Other Computer Related Services	$8,812,092	0.2%	Rank history: not on the FY2021–FY2023 lists, #92 in FY2024 and not on the FY2025 list; up 7 since Jul 2024–Jun 2025.
99	Universal Protection Service, Limited Partnership Through Universal Protection Service, LLC Top NAICS codes 561612 Security Guards and Patrol Services	$8,710,495	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
100	Relm Communications Inc. Top NAICS codes 334220 Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing	$8,631,761	0.2%	Rank history: not on the FY2021–FY2025 lists; up 14 since 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 $5.19 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