Top 100 Contractors in NAICS 237: Heavy and Civil Engineering Construction, FY2025

Name: Top 100 Contractors in NAICS 237: Heavy and Civil Engineering Construction, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 35% of FY2025 NAICS 237 contract dollars

Contract obligations: $14,008,789,558 Net of deobligations, by contracts coded NAICS 237 or a code under it
Contractors: 2,172 Parent companies with an obligation
Largest contractor: Peter Kiewit Sons', Inc. $1.71 billion, 10.6% of obligations
Data as of: Oct 23, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Peter Kiewit Sons', Inc. 9 awardees, including Kiewit Infrastructure West Co., Kiewit US Contractors Co and 381 Constructors Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$1,710,346,315	10.6%	Rank history: #4 in FY2021, #16 in FY2022, #5 in FY2023 and #3 in FY2024; up 2 since FY2024.
2	Dragados / Hawaiian Dredging / Orion JV Top agencies Navy (Department of the Navy)	$1,467,673,186	9.1%	Rank history: not on the FY2021–FY2022 lists, #2 in FY2023 and #1 in FY2024; down 1 since FY2024.
3	Tpc-Nan A Joint Venture Top agencies Navy (Department of the Navy)	$579,073,022	3.6%	Rank history: not on the FY2021–FY2024 lists; new.
4	Great Lakes Dredge & Dock Corporation 2 awardees, including Forgen LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$352,820,181	2.2%	Rank history: #1 in FY2021, #5 in FY2022, #1 in FY2023 and #4 in FY2024; unchanged since FY2024.
5	Manson Construction Co Top agencies Army (Department of the Army) Navy (Department of the Navy) Commerce (Department of Commerce)	$288,398,774	1.8%	Rank history: #8 in FY2021, #6 in FY2022, #4 in FY2023 and #7 in FY2024; up 2 since FY2024.
6	Tully Construction Co - Thalle Construction Co LLC Through Thalle Construction Co Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$285,417,977	1.8%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2024; up 2 since FY2024.
7	Nan Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$236,735,673	1.5%	Rank history: not on the FY2021 list, #86 in FY2022, not on the FY2023 list and #72 in FY2024; up 65 since FY2024.
8	Kiewit-Alberici Siop Macc AJV Top agencies Navy (Department of the Navy)	$228,800,000	1.4%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2023 and not on the FY2024 list; returned.
9	NW Construction, Inc. Top agencies DOI (Department of the Interior)	$225,853,813	1.4%	Rank history: not on the FY2021 list, #21 in FY2022, #52 in FY2023 and #26 in FY2024; up 17 since FY2024.
10	Core Tech-Hdcc-Kajima LLC Top agencies Navy (Department of the Navy)	$219,025,000	1.4%	Rank history: not on the FY2021–FY2024 lists; new.
11	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$200,119,568	1.2%	Rank history: #41 in FY2021 and not on the FY2022–FY2024 lists; returned.
12	Barnard Construction Company, Incorporated Top agencies Army (Department of the Army) DOE (Department of Energy)	$191,754,396	1.2%	Rank history: not on the FY2021 list, #19 in FY2022, not on the FY2023 list and #96 in FY2024; up 84 since FY2024.
13	OCI Overseas Holding Limited Through Contrack Watts Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$184,951,482	1.1%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2023 and #99 in FY2024; up 86 since FY2024.
14	City Light & Power FTC LLC 4 awardees, including City Light & Power Jblm LLC, City Light & Power, Inc. and City Light & Power Aberdeen, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$158,354,432	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
15	Jacobs Engineering Group Inc. Through Jacobs Project Management Co. Top agencies DOI (Department of the Interior) Army (Department of the Army)	$136,657,029	0.8%	Rank history: not on the FY2021–FY2023 lists and #15 in FY2024; unchanged since FY2024.
16	Hawaii Harbors Constructors JV Top agencies Navy (Department of the Navy)	$136,343,281	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
17	Norfolk Dredging Company Top agencies Army (Department of the Army)	$132,298,153	0.8%	Rank history: #17 in FY2021, #14 in FY2022, #17 in FY2023 and #35 in FY2024; up 18 since FY2024.
18	Ames Construction, Inc. 2 awardees, including Ames Federal Contracting Group LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$117,205,079	0.7%	Rank history: #94 in FY2021, #18 in FY2022 and not on the FY2023–FY2024 lists; up 451 since FY2024.
19	ECC Expeditionary Constructors LLC Top agencies Navy (Department of the Navy)	$116,322,240	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
20	Curtin Maritime Corp Top agencies Army (Department of the Army) Navy (Department of the Navy)	$116,117,275	0.7%	Rank history: not on the FY2021 list, #99 in FY2022, #54 in FY2023 and not on the FY2024 list; up 105 since FY2024.
21	Kokosing Alberici Traylor, LLC Top agencies Army (Department of the Army)	$106,617,374	0.7%	Rank history: not on the FY2021 list, #1 in FY2022, #9 in FY2023 and #6 in FY2024; down 15 since FY2024.
22	HHI Corporation Top agencies Army (Department of the Army)	$102,925,064	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
23	Head / Diaz 2022 Top agencies Navy (Department of the Navy)	$101,154,199	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
24	CDM Smith Inc. 3 awardees, including CDM Constructors Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) Navy (Department of the Navy)	$95,730,128	0.6%	Rank history: #31 in FY2021 and not on the FY2022–FY2024 lists; returned.
25	Weston Solutions Holdings Inc Through Weston Solutions Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$88,138,839	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
26	Weeks-Cashman JV Top agencies Navy (Department of the Navy)	$87,838,738	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
27	Novel Construction LLC Top agencies Army (Department of the Army) DOT (Department of Transportation)	$82,116,379	0.5%	Rank history: not on the FY2021–FY2024 lists; up 142 since FY2024.
28	Arctic Slope Regional Corporation 7 awardees, including Bcss, LLC, Ais Infrastructure, LLC and Asrc Earthworks, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOT (Department of Transportation)	$78,283,159	0.5%	Rank history: not on the FY2021–FY2024 lists; up 77 since FY2024.
29	Slsco, Ltd. Top agencies Navy (Department of the Navy)	$73,965,768	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
30	General Electric Company Through GE Renewables US LLC Top agencies Army (Department of the Army) DOE (Department of Energy) DOI (Department of the Interior)	$73,126,623	0.5%	Rank history: #85 in FY2021, not on the FY2022 list, #67 in FY2023 and #50 in FY2024; up 20 since FY2024.
31	Donjon Marine Co., LLC Top agencies Army (Department of the Army)	$70,096,095	0.4%	Rank history: #20 in FY2021, #30 in FY2022, #33 in FY2023 and #46 in FY2024; up 15 since FY2024.
32	Cashman Dredging & Marine Contracting Co LLC Top agencies Army (Department of the Army)	$70,026,998	0.4%	Rank history: not on the FY2021–FY2024 lists; up 302 since FY2024.
33	Reliable Contracting Group, LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$70,024,119	0.4%	Rank history: #52 in FY2021, not on the FY2022 list, #75 in FY2023 and #70 in FY2024; up 37 since FY2024.
34	Nova Group, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$67,347,986	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
35	Inland Dredging Company, L.L.C. Top agencies Army (Department of the Army)	$66,082,286	0.4%	Rank history: not on the FY2021–FY2024 lists; up 202 since FY2024.
36	Central Southern Construction Corp. Top agencies DOT (Department of Transportation)	$65,605,367	0.4%	Rank history: not on the FY2021–FY2024 lists; up 215 since FY2024.
37	Anselmi & De Cicco, Inc. Top agencies Army (Department of the Army)	$64,784,713	0.4%	Rank history: not on the FY2021–FY2024 lists; up 92 since FY2024.
38	The Dutra Group 2 awardees, including San Rafael Rock Quarry, Inc. Top agencies Army (Department of the Army)	$55,912,809	0.3%	Rank history: #7 in FY2021, #48 in FY2022, #10 in FY2023 and #21 in FY2024; down 17 since FY2024.
39	Cottrell Contracting Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$54,977,832	0.3%	Rank history: #80 in FY2021, #68 in FY2022, #72 in FY2023 and #44 in FY2024; up 5 since FY2024.
40	Fort Myer Construction Corp Top agencies DOT (Department of Transportation)	$54,392,727	0.3%	Rank history: not on the FY2021 list, #15 in FY2022 and not on the FY2023–FY2024 lists; returned.
41	C.j. Mahan Construction Company, LLC Top agencies Army (Department of the Army)	$53,305,959	0.3%	Rank history: #33 in FY2021, not on the FY2022–FY2023 lists and #54 in FY2024; up 13 since FY2024.
42	M.r. Pittman Group, L.l.c Top agencies Army (Department of the Army)	$51,547,144	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
43	Pine Bluff Sand and Gravel Company Top agencies Army (Department of the Army)	$48,560,570	0.3%	Rank history: #71 in FY2021, #78 in FY2022, not on the FY2023 list and #59 in FY2024; up 16 since FY2024.
44	Precision Construction LLC Top agencies Army (Department of the Army)	$48,523,398	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
45	Mike Hooks, LLC Top agencies Army (Department of the Army)	$48,516,711	0.3%	Rank history: #49 in FY2021, #25 in FY2022, #66 in FY2023 and #64 in FY2024; up 19 since FY2024.
46	Mckenzie Construction & Site Development LLC Top agencies DOT (Department of Transportation) DOI (Department of the Interior) GSA (General Services Administration)	$48,181,047	0.3%	Rank history: not on the FY2021–FY2024 lists; up 237 since FY2024.
47	Harper Construction Company Inc. Top agencies USAF (Department of the Air Force)	$47,953,004	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
48	Absher Construction Co Top agencies Navy (Department of the Navy)	$47,302,112	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
49	WSP USA Environment & Infrastructure Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$46,061,003	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
50	Record Steel and Construction, Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army)	$46,021,047	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
51	Steve Manning Construction Inc. Top agencies DOT (Department of Transportation)	$43,792,139	0.3%	Rank history: not on the FY2021 list, #72 in FY2022, #35 in FY2023 and #84 in FY2024; up 33 since FY2024.
52	Empire Equipment Service, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$43,692,401	0.3%	Rank history: #81 in FY2021 and not on the FY2022–FY2024 lists; returned.
53	Trumbull Corporation and Brayman Construction Corporation, A Joint Venture Top agencies Army (Department of the Army)	$43,549,577	0.3%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2024; down 51 since FY2024.
54	Luhr Crosby, LLC Top agencies Army (Department of the Army)	$43,461,951	0.3%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2023 and #30 in FY2024; down 24 since FY2024.
55	Michels Corp 2 awardees, including Michels Construction, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$43,316,132	0.3%	Rank history: not on the FY2021 list, #7 in FY2022 and not on the FY2023–FY2024 lists; returned.
56	Tutor Perini Corporation Through Perini Management Services, Inc. Top agencies DOI (Department of the Interior)	$41,867,640	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
57	Dawson Enterprises, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$41,854,199	0.3%	Rank history: not on the FY2021–FY2024 lists; up 105 since FY2024.
58	Mcmillen, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$41,833,299	0.3%	Rank history: not on the FY2021–FY2024 lists; up 93 since FY2024.
59	Estes Bros. Const. Inc. Top agencies DOT (Department of Transportation)	$41,641,200	0.3%	Rank history: #30 in FY2021, #59 in FY2022, #82 in FY2023 and #45 in FY2024; down 14 since FY2024.
60	Justin J. Reeves, L.l.c Top agencies Army (Department of the Army)	$40,702,232	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
61	Ahtna-Great Lakes E&I JV Top agencies Army (Department of the Army)	$40,013,208	0.2%	Rank history: #23 in FY2021, #70 in FY2022 and not on the FY2023–FY2024 lists; up 175 since FY2024.
62	C & C Contractors LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$39,832,172	0.2%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and not on the FY2024 list; up 413 since FY2024.
63	Western Marine Construction, Inc. Top agencies Army (Department of the Army)	$37,942,750	0.2%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; down 6 since FY2024.
64	Ukpeagvik Inupiat Corporation 5 awardees, including Northbank Civil and Marine, LLC, Bowhead Base Operations LLC and Qayaq Government Solutions LLC Top agencies Army (Department of the Army) DOE (Department of Energy) Navy (Department of the Navy)	$37,365,154	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
65	Bering Straits Native Corporation 7 awardees, including Paragon Professional Services LLC, Bering Straits Construction Solutions, LLC and Bering Straits Global Innovations, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) Navy (Department of the Navy)	$36,842,968	0.2%	Rank history: #92 in FY2021, #61 in FY2022 and not on the FY2023–FY2024 lists; up 199 since FY2024.
66	Bristol Bay Native Corporation 15 awardees, including Bristol Engineering Services Company, LLC, SES Constructors LLC and SES Technologies LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$36,308,215	0.2%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and #60 in FY2024; down 6 since FY2024.
67	Triton Marine Construction Corp. Top agencies Navy (Department of the Navy)	$36,224,246	0.2%	Rank history: not on the FY2021–FY2024 lists; up 202 since FY2024.
68	Guidehouse Inc. 2 awardees, including Aptim Federal Services, LLC and Aptim-North Wind Construction JV LLC Top agencies DLA (Defense Logistics Agency) DOE (Department of Energy) USAF (Department of the Air Force)	$35,797,154	0.2%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; down 36 since FY2024.
69	Strabag Epitoipari Zartkoruen Mukodo Reszvenytarsasag Top agencies Army (Department of the Army)	$34,444,244	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
70	Carbro Constructors Corp Top agencies Army (Department of the Army)	$34,110,382	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
71	Granite Construction Company Guam 4 awardees, including Granite Construction Company, Layne Christensen Company and Gulf Coast Builders LLP Top agencies Army (Department of the Army) DOT (Department of Transportation) Navy (Department of the Navy)	$32,595,755	0.2%	Rank history: not on the FY2021–FY2022 lists, #7 in FY2023 and #10 in FY2024; down 61 since FY2024.
72	Port of Portland (INC) Top agencies Army (Department of the Army)	$32,285,729	0.2%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
73	Calista Corp 7 awardees, including Brice Pacific LLC, Brice Civil Constructors Inc. and Brice Builders, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$31,822,864	0.2%	Rank history: not on the FY2021–FY2024 lists; up 231 since FY2024.
74	Forgen-Odin JV Top agencies Army (Department of the Army)	$31,686,585	0.2%	Rank history: not on the FY2021 list, #4 in FY2022, #13 in FY2023 and not on the FY2024 list; up 57 since FY2024.
75	J.f. Brennan Company, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$31,146,657	0.2%	Rank history: #36 in FY2021, #83 in FY2022, not on the FY2023 list and #29 in FY2024; down 46 since FY2024.
76	Skanska USA Civil West California District Inc. Top agencies Army (Department of the Army)	$30,824,210	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
77	Cycle Construction Company, L.L.C. 2 awardees, including Cycle Marine Group, Inc. Top agencies Army (Department of the Army)	$30,815,832	0.2%	Rank history: not on the FY2021–FY2024 lists; up 25 since FY2024.
78	H & L Contracting LLC Top agencies Army (Department of the Army)	$30,484,805	0.2%	Rank history: #54 in FY2021 and not on the FY2022–FY2024 lists; returned.
79	MVL Builders JV LLC Top agencies Army (Department of the Army)	$30,463,738	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
80	MEB General Contractors Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$30,041,157	0.2%	Rank history: not on the FY2021 list, #26 in FY2022, #53 in FY2023 and #23 in FY2024; down 57 since FY2024.
81	Olgoonik Corporation 3 awardees, including Olgoonik Federal, LLC and Olgoonik Enterprises, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$29,056,771	0.2%	Rank history: not on the FY2021–FY2024 lists; up 326 since FY2024.
82	Berger Cummins J V Top agencies Army (Department of the Army)	$28,750,064	0.2%	Rank history: not on the FY2021–FY2024 lists; up 304 since FY2024.
83	Roen Salvage Co. Top agencies Army (Department of the Army)	$28,715,285	0.2%	Rank history: not on the FY2021–FY2023 lists and #82 in FY2024; down 1 since FY2024.
84	Dubuque Barge and Fleeting Service Co Top agencies Army (Department of the Army)	$28,488,359	0.2%	Rank history: #43 in FY2021 and not on the FY2022–FY2024 lists; up 27 since FY2024.
85	Williams Construction & Cabinetry, Inc. Top agencies USDA (Department of Agriculture)	$27,638,304	0.2%	Rank history: not on the FY2021–FY2024 lists; up 292 since FY2024.
86	Crown Innovations, Inc. Top agencies DOT (Department of Transportation)	$27,172,480	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
87	Rigid Constructors LLC Top agencies Army (Department of the Army)	$26,697,238	0.2%	Rank history: #24 in FY2021 and not on the FY2022–FY2024 lists; up 199 since FY2024.
88	R.C.S. Construction Inc. Top agencies DOI (Department of the Interior)	$26,642,000	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
89	Advanced American Construction, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$26,610,428	0.2%	Rank history: not on the FY2021 list, #47 in FY2022, #99 in FY2023 and not on the FY2024 list; up 12 since FY2024.
90	Alltech Engineering Corp Top agencies Army (Department of the Army)	$26,401,468	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
91	Southwind Construction Corp. Top agencies Army (Department of the Army)	$26,357,504	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
92	Coastal Construction Group, LLC Top agencies DOI (Department of the Interior) VA (Department of Veterans Affairs)	$26,160,845	0.2%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 5 since FY2024.
93	Three Oaks Construction, Inc. Top agencies Army (Department of the Army)	$25,538,288	0.2%	Rank history: not on the FY2021–FY2024 lists; up 30 since FY2024.
94	Joseph J Henderson & Son Inc. Top agencies Navy (Department of the Navy)	$25,339,800	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
95	TKTMJ Inc. Top agencies Army (Department of the Army)	$24,941,739	0.2%	Rank history: not on the FY2021–FY2024 lists; up 14 since FY2024.
96	Fedvet Construction Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$24,674,336	0.2%	Rank history: not on the FY2021–FY2024 lists; up 323 since FY2024.
97	Scalfo Electric Inc. Top agencies DOT (Department of Transportation)	$24,218,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	CMS Corporation 2 awardees, including Acciona CMS Philippines LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$24,103,128	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Occi, Inc. Top agencies Army (Department of the Army)	$24,026,808	0.1%	Rank history: not on the FY2021–FY2024 lists; up 174 since FY2024.
100	TLI Construction, Inc. 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$23,793,741	0.1%	Rank history: not on the FY2021–FY2024 lists; up 26 since FY2024.

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100 of 2,172 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 237

Code	Net obligations	Largest contractor
2379 Other Heavy and Civil Engineering Construction	$10,226,172,871	Peter Kiewit Sons', Inc.
2371 Utility System Construction	$2,620,492,438	Core Tech-Hdcc-Kajima LLC
2373 Highway, Street, and Bridge Construction	$1,161,297,683	Head / Diaz 2022

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 $16.2 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.
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

Who were the top 10 NAICS 237 contractors in FY2025?

1. Peter Kiewit Sons', Inc. ($1.71B), 2. Dragados / Hawaiian Dredging / Orion JV ($1.47B), 3. Tpc-Nan A Joint Venture ($579M), 4. Great Lakes Dredge & Dock Corporation ($353M), 5. Manson Construction Co ($288M), 6. Tully Construction Co - Thalle Construction Co LLC ($285M), 7. Nan Inc. ($237M), 8. Kiewit-Alberici Siop Macc AJV ($229M), 9. NW Construction, Inc. ($226M), 10. Core Tech-Hdcc-Kajima LLC ($219M).

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