Top 100 Contractors in PSC Y1: Construction of Buildings, FY2021

Name: Top 100 Contractors in PSC Y1: Construction of Buildings, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 24% of FY2021 PSC Y1 contract dollars

Contract obligations: $23,266,578,064 Net of deobligations, by contracts coded PSC Y1 or a code under it
Contractors: 3,639 Parent companies with an obligation
Largest contractor: Walsh - Turner JV II $840 million, 3.4% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Walsh - Turner JV II Top agencies VA (Department of Veterans Affairs)	$840,130,368	3.4%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
2	Bechtel Corp Through Bechtel National, Inc. Top agencies DOE (Department of Energy)	$821,408,315	3.4%	Rank history: #8 in FY2022, #6 in FY2023, #4 in FY2024 and #3 in FY2025; up 5 since FY2020.
3	Hensel Phelps Construction Co 9 awardees, including Hensel Phelps - Shimizu JV Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$805,912,904	3.3%	Rank history: #1 in FY2022, #13 in FY2023, #3 in FY2024 and #9 in FY2025; up 1 since FY2020.
4	Core Tech-Hdcc-Kajima LLC Top agencies Navy (Department of the Navy)	$730,391,353	3.0%	Rank history: not on the FY2022 list, #39 in FY2023, #23 in FY2024 and #10 in FY2025; new, not ranked in FY2020.
5	The Whiting-Turner Contracting Company Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) GSA (General Services Administration)	$661,343,239	2.7%	Rank history: #14 in FY2022, #22 in FY2023, #13 in FY2024 and #8 in FY2025; up 5 since FY2020.
6	Great Lakes Dredge & Dock Corporation 2 awardees, including Forgen LLC Top agencies Army (Department of the Army)	$460,329,426	1.9%	Rank history: #32 in FY2022, #16 in FY2023, #47 in FY2024 and #91 in FY2025; up 9 since FY2020.
7	The Walsh Group 7 awardees, including Archer Western Federal JV, Walsh Construction Company and Walsh Construction Company II, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$431,817,180	1.8%	Rank history: #23 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
8	BAE Systems PLC Through BAE Systems Ordnance Systems Inc. Top agencies Army (Department of the Army)	$386,016,224	1.6%	Rank history: #42 in FY2022, #32 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
9	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$353,248,964	1.5%	Rank history: #4 in FY2022, #12 in FY2023, #7 in FY2024 and not on the FY2025 list; down 1 since FY2020.
10	RQ Construction, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$341,164,136	1.4%	Rank history: #11 in FY2022, #25 in FY2023, #22 in FY2024 and #16 in FY2025; up 14 since FY2020.
11	Pernix International, LLC Top agencies DOS (Department of State)	$319,127,392	1.3%	Rank history: not on the FY2022 list, #30 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
12	Tutor Perini Corporation 4 awardees, including Black Construction Corporation, ROY Anderson Corp and Perini Management Services, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DOL (Department of Labor)	$303,882,681	1.2%	Rank history: #9 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 78 since FY2020.
13	Harper Construction Company, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$258,057,054	1.1%	Rank history: #28 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
14	Parsons Corporation 2 awardees, including Parsons Government Services Inc. Top agencies Army (Department of the Army) DOE (Department of Energy)	$256,053,469	1.1%	Rank history: not on the FY2022 list, #33 in FY2023, #60 in FY2024 and #31 in FY2025; up 63 since FY2020.
15	American International Contractors (Special Projects) Inc. Top agencies DOS (Department of State)	$228,539,680	0.9%	Rank history: not on the FY2022–FY2025 lists; up 238 since FY2020.
16	Webuild S.p.A. Through The Lane Construction Corporation Top agencies Army (Department of the Army)	$219,026,187	0.9%	Rank history: #7 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
17	Hcbeck Ltd. Top agencies HHS (Department of Health and Human Services)	$202,632,769	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
18	Peter Kiewit Sons', Inc. 8 awardees, including Kiewit Infrastructure South Co, Kiewit Infrastructure Co. and Kiewit Infrastructure West Co. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$195,747,027	0.8%	Rank history: #41 in FY2022, #17 in FY2023, #9 in FY2024 and #5 in FY2025; up 17 since FY2020.
19	Dobco Inc. Top agencies Army (Department of the Army)	$195,252,888	0.8%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 178 since FY2020.
20	Clark Construction Group LLC 6 awardees, including Atkinson / Clark, A Joint Venture, Clark Construction LLC and Shirley Contracting Company, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) VA (Department of Veterans Affairs)	$181,302,509	0.7%	Rank history: #24 in FY2022, #5 in FY2023, #1 in FY2024 and #22 in FY2025; up 16 since FY2020.
21	Itsi Gilbane Japan G.K. 4 awardees, including Gilbane Federal, Gilbane Japan GK and Gilbane Building Company Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$175,944,794	0.7%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
22	Thalle Construction Co Inc. Top agencies Army (Department of the Army)	$166,853,406	0.7%	Rank history: #20 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
23	M.c. Dean, Inc. Top agencies Army (Department of the Army) GSA (General Services Administration)	$159,808,637	0.7%	Rank history: not on the FY2022–FY2025 lists; up 163 since FY2020.
24	UEI WWFNFCV65M13 Top agencies Army (Department of the Army)	$152,618,794	0.6%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; up 389 since FY2020.
25	Obayashi Corporation 3 awardees, including Webcor Construction LP and Kraemer North America LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DOS (Department of State)	$149,957,679	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	J Kokolakis Contracting Inc. Top agencies Army (Department of the Army)	$138,837,712	0.6%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; up 319 since FY2020.
27	Korte Construction Company Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$137,248,627	0.6%	Rank history: not on the FY2022 list, #54 in FY2023, #34 in FY2024 and #35 in FY2025; up 23 since FY2020.
28	Solpac Construction Inc. Top agencies Navy (Department of the Navy)	$136,768,983	0.6%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
29	Maloney-Odin JV Top agencies Army (Department of the Army)	$134,682,668	0.6%	Rank history: #92 in FY2022 and not on the FY2023–FY2025 lists; up 42 since FY2020.
30	Zodiac, Inc. Through Zodiac-Poettker HBZ Joint Venture II, LLC Top agencies Army (Department of the Army)	$129,008,000	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Brasfield & Gorrie LLC Top agencies GSA (General Services Administration) Army (Department of the Army) DOJ (Department of Justice)	$125,453,237	0.5%	Rank history: #62 in FY2022, #2 in FY2023, not on the FY2024 list and #12 in FY2025; up 311 since FY2020.
32	Walsh Federal LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Navy (Department of the Navy)	$120,205,312	0.5%	Rank history: #16 in FY2022, #1 in FY2023, #26 in FY2024 and #17 in FY2025; down 20 since FY2020.
33	ACC Construction Co., Inc. Top agencies Army (Department of the Army)	$113,749,236	0.5%	Rank history: #67 in FY2022, not on the FY2023 list, #75 in FY2024 and #23 in FY2025; up 115 since FY2020.
34	Sauer Holdings Inc. Through Sauer Construction, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$113,222,986	0.5%	Rank history: #43 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
35	Kokosing Construction Company Inc. 3 awardees, including Construction Co Corman Kokosing and Kokosing Alberici, LLC Top agencies DOT (Department of Transportation) Army (Department of the Army)	$112,868,344	0.5%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
36	Grunley Construction Co., Inc. Top agencies Army (Department of the Army) National Gallery of Art DOS (Department of State)	$111,537,551	0.5%	Rank history: #18 in FY2022, #37 in FY2023, #70 in FY2024 and #43 in FY2025; down 4 since FY2020.
37	Messer Construction Co Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$102,429,920	0.4%	Rank history: not on the FY2022 list, #59 in FY2023, #69 in FY2024 and not on the FY2025 list; unchanged since FY2020.
38	Volmar Construction Inc. Top agencies GSA (General Services Administration)	$101,661,289	0.4%	Rank history: not on the FY2022–FY2024 lists and #93 in FY2025; up 106 since FY2020.
39	Black Construction-Tutor Perini JV Top agencies Navy (Department of the Navy)	$98,512,457	0.4%	Rank history: #13 in FY2022, #85 in FY2023, #24 in FY2024 and #42 in FY2025; up 61 since FY2020.
40	Rq-Aecom 2 JV Top agencies DHS (Department of Homeland Security)	$97,938,962	0.4%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
41	Camp Dresser & Mckee Inc. 5 awardees, including CDM Constructors Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) Navy (Department of the Navy)	$90,544,542	0.4%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
42	Mccarthy Hitt - Next NGA West Joint Venture Top agencies Army (Department of the Army)	$90,440,815	0.4%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
43	Mvl-Percassi-Gemmo JV LLC Top agencies Navy (Department of the Navy)	$81,489,560	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	JE Dunn Construction Group Inc. Through J.e. Dunn Construction Company Top agencies Army (Department of the Army) DHA (Defense Health Agency) USAF (Department of the Air Force)	$80,685,805	0.3%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; up 60 since FY2020.
45	Phylway Construction, L.l.c Top agencies Army (Department of the Army)	$79,645,687	0.3%	Rank history: not on the FY2022–FY2025 lists; up 27 since FY2020.
46	Donjon Marine Co., LLC Top agencies Army (Department of the Army)	$79,217,663	0.3%	Rank history: #61 in FY2022, #77 in FY2023, #99 in FY2024 and not on the FY2025 list; up 85 since FY2020.
47	Weeks Marine Inc. 2 awardees Top agencies Army (Department of the Army) USDA (Department of Agriculture) DOI (Department of the Interior)	$79,045,902	0.3%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; down 29 since FY2020.
48	Southwest Valley Constructors Co Top agencies Army (Department of the Army)	$78,403,491	0.3%	Rank history: not on the FY2022–FY2025 lists; down 45 since FY2020.
49	Nishimatsu Construction Co.,Ltd. Top agencies Army (Department of the Army)	$76,360,734	0.3%	Rank history: not on the FY2022 list, #27 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	Ahtna-Great Lakes E&I JV Top agencies Army (Department of the Army)	$74,719,112	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Rigid Constructors LLC Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$74,194,038	0.3%	Rank history: not on the FY2022–FY2025 lists; up 189 since FY2020.
52	Turner Construction Company 5 awardees, including Sociedad Espanola De Montajes Industriales SA, Flatiron Dragados Usa, Inc. and Cobra Instalaciones Y Servicios, S.a.u. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$72,720,552	0.3%	Rank history: not on the FY2022 list, #45 in FY2023 and not on the FY2024–FY2025 lists; up 393 since FY2020.
53	Phillips Heavy, Inc. Top agencies Army (Department of the Army)	$72,683,248	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	M. a. Mortenson Companies Inc. Through M.a. Mortenson Company Top agencies Army (Department of the Army) USDA (Department of Agriculture) DOS (Department of State)	$72,128,699	0.3%	Rank history: #37 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
55	381 Constructors Top agencies Navy (Department of the Navy)	$70,000,000	0.3%	Rank history: #5 in FY2022, #11 in FY2023, #10 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
56	Estes Bros. Const. Inc. Top agencies DOT (Department of Transportation) DOI (Department of the Interior)	$69,496,648	0.3%	Rank history: not on the FY2022–FY2023 lists, #98 in FY2024 and not on the FY2025 list; up 281 since FY2020.
57	Contrack International Inc. Through Contrack Watts Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$68,982,460	0.3%	Rank history: not on the FY2022–FY2025 lists; up 400 since FY2020.
58	Granite-Obayashi A Joint Venture Top agencies Navy (Department of the Navy)	$68,910,030	0.3%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
59	Industrial Builders Inc. Top agencies Army (Department of the Army)	$67,115,891	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Caddell-Nan A Joint Venture Top agencies Navy (Department of the Navy)	$66,555,528	0.3%	Rank history: #85 in FY2022, not on the FY2023 list, #51 in FY2024 and not on the FY2025 list; down 39 since FY2020.
61	Cook Inlet Region Inc. 6 awardees, including North Wind Construction Services, LLC, Silver Mountain Construction, LLC and Weldin Construction LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$65,748,182	0.3%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
62	Advon Corporation Top agencies VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration)	$65,698,651	0.3%	Rank history: not on the FY2022–FY2025 lists; up 155 since FY2020.
63	Mccarthy Mortenson Nbaf A Joint Venture Top agencies DHS (Department of Homeland Security)	$65,244,333	0.3%	Rank history: not on the FY2022–FY2025 lists; up 232 since FY2020.
64	B & K Construction Co L.l.c Top agencies Army (Department of the Army)	$64,862,312	0.3%	Rank history: not on the FY2022 list, #58 in FY2023 and not on the FY2024–FY2025 lists; up 135 since FY2020.
65	Nana Regional Corporation Inc 5 awardees, including Portico Services LLC, Jade Creek Construction LLC and Tuvli LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOS (Department of State)	$63,964,225	0.3%	Rank history: not on the FY2022–FY2025 lists; up 240 since FY2020.
66	Rooney Holdings, Inc. Through Manhattan Construction Company LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$63,695,597	0.3%	Rank history: not on the FY2022–FY2025 lists; up 116 since FY2020.
67	Ryan Companies US Inc. Top agencies GSA (General Services Administration)	$62,336,654	0.3%	Rank history: not on the FY2022–FY2025 lists; up 41 since FY2020.
68	Empresa De Construccion Y Transporte Eterna S.A. De C.V. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOS (Department of State)	$61,299,408	0.3%	Rank history: not on the FY2022–FY2024 lists and #89 in FY2025; up 234 since FY2020.
69	R.a. Burch Construction Co., Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$60,403,267	0.2%	Rank history: not on the FY2022 list, #44 in FY2023, not on the FY2024 list and #62 in FY2025; down 2 since FY2020.
70	Hourigan Construction Corp Top agencies Navy (Department of the Navy)	$60,361,639	0.2%	Rank history: not on the FY2022–FY2025 lists; up 158 since FY2020.
71	Valiant Construction LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$59,981,552	0.2%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
72	Balfour Beatty LLC 2 awardees, including Balfour Beatty Construction, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$59,359,760	0.2%	Rank history: #27 in FY2022, #14 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
73	The Dutra Group Top agencies Army (Department of the Army)	$58,965,823	0.2%	Rank history: #86 in FY2022, #38 in FY2023, #56 in FY2024 and not on the FY2025 list; up 5 since FY2020.
74	Clark / Byrne Aquatics, A Joint Venture Top agencies Army (Department of the Army)	$58,950,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	TNT Constructors Top agencies Navy (Department of the Navy)	$58,541,448	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Manhattan Torcon A Joint Venture Top agencies Army (Department of the Army)	$56,509,286	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Tepa, LLC Through Tepa EC, LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$55,444,666	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Manson Construction Co. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$54,385,968	0.2%	Rank history: #26 in FY2022, #28 in FY2023, #20 in FY2024 and #21 in FY2025; down 64 since FY2020.
79	Thompson Builders Corp Top agencies USAF (Department of the Air Force)	$54,219,500	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Randy Kinder Excavating Inc. Top agencies VA (Department of Veterans Affairs) DOT (Department of Transportation) DOE (Department of Energy)	$53,427,598	0.2%	Rank history: not on the FY2022–FY2025 lists; down 51 since FY2020.
81	J & J Contractors, Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy) Army (Department of the Army)	$51,686,332	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	S.b. Ballard Construction Company Top agencies Navy (Department of the Navy) Army (Department of the Army)	$51,123,803	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Bristol Prime Contractors, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$51,092,207	0.2%	Rank history: not on the FY2022–FY2025 lists; up 47 since FY2020.
84	Afci-Cci JV One LLC Top agencies VA (Department of Veterans Affairs)	$51,056,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	PCL U.S. Holdings Inc Through Nordic PCL Construction, Inc. Top agencies Army (Department of the Army)	$50,562,049	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Ecrmjv LLC Top agencies VA (Department of Veterans Affairs)	$49,939,194	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Conti Enterprises Inc. 2 awardees, including Conti Federal Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$49,332,835	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	AECOM 9 awardees, including Shimmick Construction Company, Inc., URS Group, Inc. and AECOM Construction, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$48,431,335	0.2%	Rank history: not on the FY2022–FY2025 lists; down 49 since FY2020.
89	J.f. Brennan Company, Inc. Top agencies Army (Department of the Army)	$48,014,598	0.2%	Rank history: not on the FY2022–FY2023 lists, #76 in FY2024 and not on the FY2025 list; up 94 since FY2020.
90	Tanadgusix Corporation 5 awardees, including Sand Point Services, LLC, TDX Power Services LLC and TDX Quality, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$46,838,919	0.2%	Rank history: not on the FY2022–FY2025 lists; up 81 since FY2020.
91	SGS LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$46,756,401	0.2%	Rank history: #82 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 82 since FY2020.
92	Cianbro- AZ A Joint Venture Top agencies Army (Department of the Army)	$46,421,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Davis Constructors & Engineers, Inc. Top agencies Army (Department of the Army)	$45,637,064	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Tepe Bozdemir Ortak Girisimi Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$44,488,400	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Structural Associates Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$43,626,143	0.2%	Rank history: not on the FY2022–FY2025 lists; up 75 since FY2020.
96	Greenland Enterprises, Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$42,558,635	0.2%	Rank history: not on the FY2022–FY2025 lists; up 141 since FY2020.
97	Emr, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$42,530,771	0.2%	Rank history: #56 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
98	Veterans Holding Group LLC Through Relyant Global LLC Top agencies DOS (Department of State) USAF (Department of the Air Force) Army (Department of the Army)	$42,261,687	0.2%	Rank history: not on the FY2022–FY2025 lists; up 246 since FY2020.
99	Hatcon Insaat Taahhut Ithalat Ihracat Limited Sirketi Top agencies Army (Department of the Army)	$42,231,613	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Wood Environment & Infrastructure Solutions Inc. 2 awardees, including WSP USA Environment & Infrastructure Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) HHS (Department of Health and Human Services)	$42,091,645	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 3,639 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC Y1

Code	Net obligations	Largest contractor
Y1JZ Construction of Miscellaneous Buildings	$4,237,241,931	Walsh - Turner JV II
Y1AA Construction of Office Buildings	$2,487,041,999	Pernix International, LLC
Y1AZ Construction of Other Administrative Facilities and Service Buildings	$1,463,222,078	Hensel Phelps Construction Co
Y1LB Construction of Highways, Roads, Streets, Bridges, and Railways	$1,174,705,388	Kokosing Construction Company Inc.
Y1PZ Construction of Other Non-Building Facilities	$1,094,874,234	M.c. Dean, Inc.
Y1FC Construction of Troop Housing Facilities	$980,618,575	Core Tech-Hdcc-Kajima LLC
Y1DA Construction of Hospitals and Infirmaries	$960,874,448	Clark Construction Group LLC
Y1KB Construction of Canals	$689,982,151	Great Lakes Dredge & Dock Corporation
Y1BZ Construction of Other Airfield Structures	$663,089,674	Hensel Phelps Construction Co
Y1EZ Construction of Other Industrial Buildings	$652,604,969	Hensel Phelps Construction Co
Y1DB Construction of Laboratories and Clinics	$617,019,893	RQ Construction, LLC
Y1KF Construction of Dredging Facilities	$582,323,521	Great Lakes Dredge & Dock Corporation
Y1CZ Construction of Other Educational Buildings	$477,335,199	Dobco Inc.
Y1KA Construction of Dams	$471,282,133	Thalle Construction Co Inc.
Y1DZ Construction of Other Hospital Buildings	$441,786,727	The Walsh Group
Y1QA Construction of Restoration of Real Property (Public or Private)	$404,818,326	Great Lakes Dredge & Dock Corporation
Y1FA Construction of Family Housing Facilities	$306,424,187	Mvl-Percassi-Gemmo JV LLC
Y1KZ Construction of Other Conservation and Development Facilities	$265,213,219	Great Lakes Dredge & Dock Corporation
Y1EB Construction of Maintenance Buildings	$242,397,832	Sauer Holdings Inc.
Y1NZ Construction of Other Utilities	$238,058,092	Reliable Builders Inc.
Y1PC Construction of Unimproved Real Property (Land)	$234,693,221	Ahtna-Great Lakes E&I JV
Y1GZ Construction of Other Warehouse Buildings	$197,648,033	Core Tech-Hdcc-Kajima LLC
Y1NA Construction of Fuel Supply Facilities	$165,110,679	Hensel Phelps Construction Co
Y1BD Construction of Airport Runways and Taxiways	$163,621,906	B.l. Harbert Holdings, L.L.C.
Y1NE Construction of Water Supply Facilities	$157,260,450	Camp Dresser & Mckee Inc.
Y1BG Construction of Electronic and Communications Facilities	$154,723,160	SGS LLC
Y1GC Construction of Fuel Storage Buildings	$153,031,204	Wood Environment & Infrastructure Solutions Inc.
Y1CA Construction of Schools	$140,006,355	Messer Construction Co
Y1FZ Construction of Other Residential Buildings	$125,334,226	Tutor Perini Corporation
Y1LZ Construction of Parking Facilities	$115,892,360	HGL Construction Inc.
Y1JA Construction of Museums and Exhibition Buildings	$101,532,401	Clark / Smoot / Consigli, A Joint Venture
Y1LC Construction of Tunnels and Subsurface Structures	$91,750,888	AECOM
Y1BC Construction of Radar and Navigational Facilities	$74,604,606	UEI WWFNFCV65M13
Y1PA Construction of Recreation Facilities (Non-Building)	$60,878,926	Martin Brothers Construction
Y1FB Construction of Recreational Buildings	$50,827,444	Tepa, LLC
Y1PD Construction of Waste Treatment and Storage Facilities	$49,682,699	Tikigaq Corporation
Y1ND Construction of Sewage and Waste Facilities	$48,458,322	SAK Construction LLC
Y1NB Construction of Heating and Cooling Plants	$40,046,850	Greenland Enterprises, Inc.
Y1GD Construction of Open Storage Facilities	$25,134,034	Bristol Site Contractors, LLC
Y1AB Construction of Conference Space and Facilities	$12,851,264	Mountain Point, LLC

Show all 40

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 $24.4 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC Y1 contractors in FY2021?

1. Walsh - Turner JV II ($840M), 2. Bechtel Corp ($821M), 3. Hensel Phelps Construction Co ($806M), 4. Core Tech-Hdcc-Kajima LLC ($730M), 5. The Whiting-Turner Contracting Company ($661M), 6. Great Lakes Dredge & Dock Corporation ($460M), 7. The Walsh Group ($432M), 8. BAE Systems PLC ($386M), 9. B.l. Harbert Holdings, L.L.C. ($353M), 10. RQ Construction, LLC ($341M).

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