Top 100 Department of the Interior Contractors, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	NW Construction, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$225,853,813	4.1%	Rank history: not on the FY2021 list, #2 in FY2022, #9 in FY2023 and #5 in FY2024; up 4 since FY2024.
2	Peter Kiewit Sons', Inc. Through Kiewit Infrastructure West Co. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$217,243,440	4.0%	Rank history: #32 in FY2021 and not on the FY2022–FY2024 lists; returned.
3	Jacobs Government Services Company 5 awardees, including Jacobs Project Management Co., Jacobs Engineering Group Inc. and Ch2M Hill, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 541330 Engineering Services 541690 Other Scientific and Technical Consulting Services	$143,386,122	2.6%	Rank history: #35 in FY2021, #66 in FY2022, #29 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	Ames Federal Contracting Group LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$112,100,000	2.1%	Rank history: not on the FY2021–FY2024 lists; new.
5	Tepa EC, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 238990 All Other Specialty Trade Contractors	$109,376,451	2.0%	Rank history: not on the FY2021 list, #3 in FY2022, not on the FY2023 list and #2 in FY2024; down 3 since FY2024.
6	CDM Constructors Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$88,273,589	1.6%	Rank history: not on the FY2021–FY2023 lists and #1 in FY2024; down 5 since FY2024.
7	Perimeter Solutions LP Top NAICS codes 325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing	$66,657,060	1.2%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2024; up 1 since FY2024.
8	Accenture Federal Services LLC Top NAICS codes 541519 Other Computer Related Services 541511 Custom Computer Programming Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$48,999,485	0.9%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; down 1 since FY2024.
9	Record Steel and Construction, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$45,535,140	0.8%	Rank history: not on the FY2021 list, #83 in FY2022 and not on the FY2023–FY2024 lists; returned.
10	Stronghold Engineering Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction	$43,563,301	0.8%	Rank history: not on the FY2021–FY2022 lists, #1 in FY2023 and not on the FY2024 list; returned.
11	Tutor Perini Corporation Through Perini Management Services, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 236220 Commercial and Institutional Building Construction	$43,306,280	0.8%	Rank history: not on the FY2021–FY2024 lists; up 366 since FY2024.
12	KBR Wyle Services LLC 3 awardees Top NAICS codes 541513 Computer Facilities Management Services 811219 Other Electronic and Precision Equipment Repair and Maintenance 541330 Engineering Services	$38,786,877	0.7%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; down 3 since FY2024.
13	Lumen Technologies Government Solutions, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers 517810 All Other Telecommunications 517111 Wired Telecommunications Carriers	$37,721,051	0.7%	Rank history: not on the FY2021 list, #19 in FY2022, not on the FY2023 list and #16 in FY2024; up 3 since FY2024.
14	Planet Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$35,720,839	0.7%	Rank history: #48 in FY2021, #17 in FY2022, #15 in FY2023 and #12 in FY2024; down 2 since FY2024.
15	Medvolt - Roundhouse JV Top NAICS codes 236220 Commercial and Institutional Building Construction	$34,316,195	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
16	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	$30,194,863	0.6%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; up 44 since FY2024.
17	Dell Technologies Inc. 2 awardees, including Dell Federal Systems L.P Top NAICS codes 511210 Software Publishers 334111 Electronic Computer Manufacturing	$29,577,682	0.5%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; up 13 since FY2024.
18	Sealaska Constructors LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 236118 Residential Remodelers	$27,413,746	0.5%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 30 since FY2024.
19	Bristow Group Inc. Through Bristow LLC Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation	$27,184,478	0.5%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; down 2 since FY2024.
20	SNF Inc. Top NAICS codes 336992 Military Armored Vehicle, Tank, and Tank Component Manufacturing 336211 Motor Vehicle Body Manufacturing 811111 General Automotive Repair	$26,832,231	0.5%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2024; up 25 since FY2024.
21	NV5 Geospatial, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541370 Surveying and Mapping (except Geophysical) Services	$26,699,654	0.5%	Rank history: not on the FY2021–FY2023 lists and #14 in FY2024; down 7 since FY2024.
22	R.C.S. Construction Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$26,642,000	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
23	Guardian Construction, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237310 Highway, Street, and Bridge Construction 237990 Other Heavy and Civil Engineering Construction	$26,607,249	0.5%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and not on the FY2024 list; up 123 since FY2024.
24	Pullman Sst, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 238150 Glass and Glazing Contractors	$25,890,701	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
25	Nana Regional Corporation Inc. 3 awardees, including Affigent, LLC and Jade Creek Construction LLC Top NAICS codes 541519 Other Computer Related Services 237990 Other Heavy and Civil Engineering Construction 513210 Software Publishers	$24,985,849	0.5%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 71 since FY2024.
26	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 541519 Other Computer Related Services	$24,522,834	0.4%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2024; up 50 since FY2024.
27	Countertrade Products, Inc. Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services 221114 Solar Electric Power Generation	$24,135,064	0.4%	Rank history: #13 in FY2021, #11 in FY2022, #13 in FY2023 and #11 in FY2024; down 16 since FY2024.
28	Stone & Lime Imports, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237990 Other Heavy and Civil Engineering Construction	$24,091,505	0.4%	Rank history: #82 in FY2021, #41 in FY2022, #25 in FY2023 and not on the FY2024 list; returned.
29	Hartman-Walsh Corp Through Hartman-Walsh Painting Company Top NAICS codes 238320 Painting and Wall Covering Contractors 237110 Water and Sewer Line and Related Structures Construction 237990 Other Heavy and Civil Engineering Construction	$23,214,249	0.4%	Rank history: not on the FY2021 list, #89 in FY2022, #82 in FY2023 and #39 in FY2024; up 10 since FY2024.
30	Woolpert, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services 541519 Other Computer Related Services	$22,255,151	0.4%	Rank history: #53 in FY2021, #30 in FY2022, #79 in FY2023 and #15 in FY2024; down 15 since FY2024.
31	Garco Construction, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$21,718,682	0.4%	Rank history: #27 in FY2021, #38 in FY2022, #42 in FY2023 and #50 in FY2024; up 19 since FY2024.
32	Arctic Slope Regional Corporation 7 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	$21,222,074	0.4%	Rank history: #5 in FY2021, #33 in FY2022, #40 in FY2023 and #68 in FY2024; up 36 since FY2024.
33	Paulsen Construction, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$21,122,038	0.4%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 8 since FY2024.
34	Verizon 6 awardees, including Cellco Partnership, Verizon Business Network Services LLC and MCI Communications Services LLC Top NAICS codes 517312 Wireless Telecommunications Carriers (except Satellite) 517110 Wired Telecommunications Carriers 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing	$20,040,310	0.4%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2024; up 4 since FY2024.
35	CACI International Inc. 2 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top NAICS codes 541519 Other Computer Related Services	$19,631,886	0.4%	Rank history: #20 in FY2021, not on the FY2022 list, #28 in FY2023 and #41 in FY2024; up 6 since FY2024.
36	Forsgren Associates Inc. Top NAICS codes 541330 Engineering Services	$19,376,848	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
37	A&R Pacific-Garney Federal JV II Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$19,039,200	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
38	Co Fire Aviation, Inc. Top NAICS codes 115310 Support Activities for Forestry	$17,914,940	0.3%	Rank history: not on the FY2021–FY2024 lists; up 72 since FY2024.
39	RJS Construction, Inc. 2 awardees Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction 237990 Other Heavy and Civil Engineering Construction	$17,583,974	0.3%	Rank history: not on the FY2021–FY2024 lists; up 374 since FY2024.
40	Ames 1 LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction	$17,513,998	0.3%	Rank history: not on the FY2021–FY2024 lists; up 422 since FY2024.
41	The Aleut Corporation Through Aleut Construction LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 237310 Highway, Street, and Bridge Construction	$17,507,829	0.3%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and not on the FY2024 list; up 196 since FY2024.
42	Teksynap Corporation Top NAICS codes 541512 Computer Systems Design Services	$17,293,133	0.3%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and #43 in FY2024; up 1 since FY2024.
43	Merrick-Surdex Joint Venture LLP Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$17,191,063	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #62 in FY2023 and #78 in FY2024; up 35 since FY2024.
44	Dewberry Engineers Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$16,775,738	0.3%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2024; down 18 since FY2024.
45	Western Pilot Service Inc. Top NAICS codes 115310 Support Activities for Forestry	$16,288,735	0.3%	Rank history: #70 in FY2021, not on the FY2022–FY2023 lists and #72 in FY2024; up 27 since FY2024.
46	Forgen LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$15,700,000	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
47	MGC Contractors Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$15,645,824	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
48	Lacy Mechanical Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$15,608,740	0.3%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 18 since FY2024.
49	Hpm, Inc. Top NAICS codes 236116 New Multifamily Housing Construction (except For-Sale Builders) 236117 New Housing For-Sale Builders 237110 Water and Sewer Line and Related Structures Construction	$15,548,409	0.3%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023 and not on the FY2024 list; returned.
50	Coastal Construction Group, LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$15,542,845	0.3%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 27 since FY2024.
51	RBA Engineering International, PLLC Top NAICS codes 237310 Highway, Street, and Bridge Construction	$15,539,702	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
52	Cape Romain Contractors, Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$15,538,301	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
53	Bairco Construction Inc. Top NAICS codes 221320 Sewage Treatment Facilities 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction	$15,448,488	0.3%	Rank history: #45 in FY2021, not on the FY2022–FY2023 lists and #88 in FY2024; up 35 since FY2024.
54	Nationwide It Services Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services	$15,245,797	0.3%	Rank history: #73 in FY2021, #34 in FY2022, #46 in FY2023 and #37 in FY2024; down 17 since FY2024.
55	Mckenzie Construction & Site Development LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction 237110 Water and Sewer Line and Related Structures Construction 238220 Plumbing, Heating, and Air-Conditioning Contractors	$15,204,568	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
56	Chitina Diversified -Ames 1 JV LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$14,947,148	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
57	Promethean Operating I LLC Top NAICS codes 213112 Support Activities for Oil and Gas Operations	$14,866,119	0.3%	Rank history: not on the FY2021–FY2023 lists and #61 in FY2024; up 4 since FY2024.
58	Nexgen Technologies Inc. Top NAICS codes 541511 Custom Computer Programming Services 541513 Computer Facilities Management Services	$14,773,306	0.3%	Rank history: #42 in FY2021, #40 in FY2022, #51 in FY2023 and #51 in FY2024; down 7 since FY2024.
59	Fugro USA Land, Inc. Top NAICS codes 541360 Geophysical Surveying and Mapping Services	$14,582,208	0.3%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 24 since FY2024.
60	Outside Box LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 238990 All Other Specialty Trade Contractors	$14,480,382	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
61	Nuaxis LLC Top NAICS codes 541519 Other Computer Related Services	$14,468,043	0.3%	Rank history: #19 in FY2021, #31 in FY2022, #48 in FY2023 and #22 in FY2024; down 39 since FY2024.
62	General Dynamics Corporation 3 awardees, including General Dynamics Mission Systems, Inc. and General Dynamics Information Technology, Inc. Top NAICS codes 541330 Engineering Services 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$14,297,291	0.3%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and #36 in FY2024; down 26 since FY2024.
63	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; new.
64	Weeminuche Construction Authority Through WCA Construction, LLC Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction 237990 Other Heavy and Civil Engineering Construction 221310 Water Supply and Irrigation Systems	$14,016,520	0.3%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2024; down 18 since FY2024.
65	Mcmillen, Inc. Top NAICS codes 237110 Water and Sewer Line and Related Structures Construction	$13,813,960	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
66	Stantec Inc. 4 awardees, including Stantec Consulting Services Inc. Top NAICS codes 541330 Engineering Services 541620 Environmental Consulting Services 541690 Other Scientific and Technical Consulting Services	$13,738,973	0.3%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2023 and #64 in FY2024; down 2 since FY2024.
67	Bridger Aerospace Group, LLC Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation	$13,607,188	0.2%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
68	Firelake Construction Inc Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 236210 Industrial Building Construction	$13,480,947	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
69	Ritz Construction Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 238210 Electrical Contractors and Other Wiring Installation Contractors 236210 Industrial Building Construction	$13,380,327	0.2%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; up 11 since FY2024.
70	SNC Tallimat, LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$13,168,610	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
71	Dickerson Infrastructure Inc. Top NAICS codes 237990 Other Heavy and Civil Engineering Construction	$13,125,355	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
72	Hdr, Inc. 4 awardees, including HDR Engineering, Inc. and HDR Schnabel Reclamation Joint Venture Top NAICS codes 541330 Engineering Services 541310 Architectural Services	$13,062,577	0.2%	Rank history: #43 in FY2021, #18 in FY2022, #30 in FY2023 and #35 in FY2024; down 37 since FY2024.
73	CGI Federal Inc. Top NAICS codes 541511 Custom Computer Programming Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541519 Other Computer Related Services	$12,979,440	0.2%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; down 16 since FY2024.
74	Henrys Aerial Service Inc. Top NAICS codes 115310 Support Activities for Forestry	$12,497,065	0.2%	Rank history: not on the FY2021–FY2024 lists; up 80 since FY2024.
75	Colossal Contracting LLC Top NAICS codes 541519 Other Computer Related Services 513210 Software Publishers 334111 Electronic Computer Manufacturing	$12,236,997	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #95 in FY2024; up 20 since FY2024.
76	Software Information Resource Corp Top NAICS codes 513210 Software Publishers 541519 Other Computer Related Services	$12,225,663	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #69 in FY2024; down 7 since FY2024.
77	Arana Group Inc Top NAICS codes 236220 Commercial and Institutional Building Construction	$11,822,708	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
78	Environmental Systems Research Institute, Inc. Top NAICS codes 511210 Software Publishers 611420 Computer Training	$11,675,684	0.2%	Rank history: #65 in FY2021, #74 in FY2022, not on the FY2023 list and #59 in FY2024; down 19 since FY2024.
79	New Frontier Aviation, LLC Top NAICS codes 115310 Support Activities for Forestry	$11,275,002	0.2%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.
80	John Cecil Construction, LLC Top NAICS codes 237310 Highway, Street, and Bridge Construction 236220 Commercial and Institutional Building Construction	$11,256,770	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
81	Chenega Professional & Technical Services LLC Top NAICS codes 541511 Custom Computer Programming Services	$11,203,190	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, not on the FY2023 list and #85 in FY2024; up 4 since FY2024.
82	Michels Construction, Inc. Top NAICS codes 237130 Power and Communication Line and Related Structures Construction	$11,183,624	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
83	VF Imagewear, Inc. Through Workwear Outfitters, LLC Top NAICS codes 315210 Cut and Sew Apparel Contractors	$11,114,680	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
84	Aero Spray Inc. Top NAICS codes 115310 Support Activities for Forestry	$11,071,149	0.2%	Rank history: #29 in FY2021, not on the FY2022–FY2023 lists and #77 in FY2024; down 7 since FY2024.
85	Xcellent Technology Solutions, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$10,815,270	0.2%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2023–FY2024 lists; up 18 since FY2024.
86	Govsmart, Inc. Top NAICS codes 541519 Other Computer Related Services	$10,801,963	0.2%	Rank history: not on the FY2021–FY2024 lists; up 247 since FY2024.
87	Fletcher Flying Service Inc Top NAICS codes 115310 Support Activities for Forestry	$10,724,578	0.2%	Rank history: not on the FY2021–FY2024 lists; up 74 since FY2024.
88	T1 Construction LLC Top NAICS codes 237990 Other Heavy and Civil Engineering Construction 236220 Commercial and Institutional Building Construction 561621 Security Systems Services (except Locksmiths)	$10,720,257	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
89	Project Solutions, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$10,611,279	0.2%	Rank history: not on the FY2021–FY2024 lists; up 118 since FY2024.
90	Goldbelt Nighthawk, LLC Top NAICS codes 541519 Other Computer Related Services	$10,562,657	0.2%	Rank history: not on the FY2021–FY2024 lists; up 274 since FY2024.
91	Wright Bros LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$10,530,738	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
92	Marrero, Couvillon & Associates, L.L.C. Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction	$10,275,941	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
93	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; new.
94	The Whitestone Group, Inc. Top NAICS codes 561612 Security Guards and Patrol Services	$10,242,450	0.2%	Rank history: not on the FY2021–FY2024 lists; up 108 since FY2024.
95	Brainerd Helicopters, Inc. Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation 488190 Other Support Activities for Air Transportation 481212 Nonscheduled Chartered Freight Air Transportation	$10,191,133	0.2%	Rank history: not on the FY2021–FY2024 lists; up 34 since FY2024.
96	Northern Management Services, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction 237120 Oil and Gas Pipeline and Related Structures Construction	$10,190,475	0.2%	Rank history: not on the FY2021–FY2024 lists; up 41 since FY2024.
97	Bighorn Airways Inc. Top NAICS codes 481211 Nonscheduled Chartered Passenger Air Transportation 115310 Support Activities for Forestry	$10,109,102	0.2%	Rank history: #75 in FY2021 and not on the FY2022–FY2024 lists; up 33 since FY2024.
98	Alliance for Energy Innovation, LLC Top NAICS codes 541711 Research and Development in Biotechnology	$9,773,411	0.2%	Rank history: not on the FY2021–FY2024 lists; up 22 since FY2024.
99	Central Environmental Inc. Top NAICS codes 237310 Highway, Street, and Bridge Construction 236220 Commercial and Institutional Building Construction	$9,746,817	0.2%	Rank history: not on the FY2021 list, #15 in FY2022 and not on the FY2023–FY2024 lists; up 114 since FY2024.
100	Makpar-Nuaxis JV LLC Top NAICS codes 541519 Other Computer Related Services	$9,599,585	0.2%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; down 8 since FY2024.

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 $5.45 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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