Top 100 Contractors in PSC S1: Utilities, FY2025

Name: Top 100 Contractors in PSC S1: Utilities, FY2025
Creator: GovTribe

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

The top 10 won 44% of FY2025 PSC S1 contract dollars

Contract obligations: $3,069,473,454 Net of deobligations, by contracts coded PSC S1 or a code under it
Contractors: 808 Parent companies with an obligation
Largest contractor: Foreign Utility Consolidated Reporting $234 million, 7.2% 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	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$233,853,282	7.2%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023 and #2 in FY2024; up 1 since FY2024.
2	American Water Works Company Inc. 4 awardees, including American Water Operations and Maintenance, LLC, American Water Military Services, LLC and Kentucky-American Water Company Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$207,814,259	6.4%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023 and #1 in FY2024; down 1 since FY2024.
3	L3Harris Technologies, Inc. Through Harris Corporation Top agencies DOT (Department of Transportation)	$198,871,634	6.1%	Rank history: #4 in FY2021, #5 in FY2022, #3 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	Dominion Resources Inc. 11 awardees, including Virginia Electric and Power Company, Dominion Privatization Texas, LLC and Dominion Privatization Virginia, LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) NASA (National Aeronautics and Space Administration)	$148,168,454	4.6%	Rank history: #6 in FY2021, #4 in FY2022, #5 in FY2023 and #6 in FY2024; up 2 since FY2024.
5	Doyon Utilities, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$117,310,258	3.6%	Rank history: #5 in FY2021, #6 in FY2022, #7 in FY2023 and #4 in FY2024; down 1 since FY2024.
6	Amber Infrastructure LLC 6 awardees, including City Light & Power Aberdeen, LLC, City Light & Power, Inc. and City Light & Power Jblm LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$115,617,670	3.6%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2024; up 2 since FY2024.
7	Constellation Newenergy, Inc. 6 awardees, including Baltimore Gas and Electric Company, Peco Energy Company and Pepco Holdings LLC Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) SSA (Social Security Administration)	$112,123,369	3.5%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2024; up 22 since FY2024.
8	Fort Bliss Water Services Company 6 awardees, including Old North Utility Services, Inc., American States Utility Services Inc. and Old Dominion Utility Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$95,381,109	2.9%	Rank history: not on the FY2021 list, #86 in FY2022, #35 in FY2023 and #7 in FY2024; down 1 since FY2024.
9	Potomac Electric Power Co Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) Smithsonian (Smithsonian Institution)	$93,095,267	2.9%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and #5 in FY2024; down 4 since FY2024.
10	WGL Energy Services Inc. 2 awardees, including Washington Gas Light Company Top agencies GSA (General Services Administration) HHS (Department of Health and Human Services) DOT (Department of Transportation)	$88,414,420	2.7%	Rank history: #8 in FY2021, #9 in FY2022, #6 in FY2023 and #9 in FY2024; down 1 since FY2024.
11	Pacific Gas and Electric Company Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOI (Department of the Interior)	$60,159,209	1.9%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2024; down 1 since FY2024.
12	AEP Energy Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$55,122,360	1.7%	Rank history: not on the FY2021 list, #100 in FY2022, not on the FY2023 list and #59 in FY2024; up 47 since FY2024.
13	Georgia Power Company 7 awardees, including Alabama Power Company, Southern Company Gas and Mississippi Power Co Top agencies Army (Department of the Army) DOJ (Department of Justice) GSA (General Services Administration)	$50,477,419	1.6%	Rank history: #15 in FY2021, #10 in FY2022, #16 in FY2023 and #15 in FY2024; up 2 since FY2024.
14	Korea Electric Power Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$46,714,802	1.4%	Rank history: #36 in FY2021 and not on the FY2022–FY2024 lists; returned.
15	Keenan FT Detrick Energy LLC Top agencies Army (Department of the Army)	$44,694,187	1.4%	Rank history: #10 in FY2021, #12 in FY2022, #18 in FY2023 and #14 in FY2024; down 1 since FY2024.
16	Vicinity Energy Inc. Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration)	$42,193,371	1.3%	Rank history: not on the FY2021–FY2024 lists; up 149 since FY2024.
17	Jacobs Government Services Company Through Ch2M Hill Constructors, Inc. Top agencies Army (Department of the Army)	$40,294,755	1.2%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #20 in FY2024; up 3 since FY2024.
18	Direct Energy Business LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) DOJ (Department of Justice)	$37,312,265	1.2%	Rank history: not on the FY2021 list, #99 in FY2022, #71 in FY2023 and #40 in FY2024; up 22 since FY2024.
19	Water Authority Busan Metropolitan City Korea Through Korea Electric Power Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$32,399,287	1.0%	Rank history: #9 in FY2021, #14 in FY2022, #9 in FY2023 and #12 in FY2024; down 7 since FY2024.
20	Oklahoma City Water Utilities Trust 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$31,838,348	1.0%	Rank history: not on the FY2021 list, #51 in FY2022, #24 in FY2023 and #18 in FY2024; down 2 since FY2024.
21	Engie Resources LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOJ (Department of Justice)	$30,615,937	0.9%	Rank history: #62 in FY2021, #18 in FY2022, #50 in FY2023 and #28 in FY2024; up 7 since FY2024.
22	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies DOT (Department of Transportation)	$28,526,890	0.9%	Rank history: #17 in FY2021, #50 in FY2022, #27 in FY2023 and #17 in FY2024; down 5 since FY2024.
23	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$28,141,640	0.9%	Rank history: #14 in FY2021, #19 in FY2022, #21 in FY2023 and #21 in FY2024; down 2 since FY2024.
24	Duke Energy Corporation 3 awardees, including Duke Energy Progress, LLC, Piedmont Natural Gas Company, Inc. and Duke Energy Carolinas, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DOJ (Department of Justice)	$27,937,414	0.9%	Rank history: #30 in FY2021, #11 in FY2022, #11 in FY2023 and #24 in FY2024; unchanged since FY2024.
25	Puget Sound Energy Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$25,978,910	0.8%	Rank history: not on the FY2021–FY2024 lists; up 119 since FY2024.
26	NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) DOJ (Department of Justice)	$24,070,112	0.7%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and not on the FY2024 list; returned.
27	Nextera Energy Inc. 2 awardees, including Gexa Energy, LP and Pivotal Utility Holdings Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$23,903,962	0.7%	Rank history: #16 in FY2021, #16 in FY2022, #12 in FY2023 and #19 in FY2024; down 8 since FY2024.
28	Consolidated Edison Inc. Through Consolidated Edison Company of New York, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) Smithsonian (Smithsonian Institution)	$23,638,967	0.7%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2023 and #45 in FY2024; up 17 since FY2024.
29	Augusta-Richmond County Government Top agencies Army (Department of the Army)	$22,613,682	0.7%	Rank history: #39 in FY2021, #44 in FY2022, #64 in FY2023 and #42 in FY2024; up 13 since FY2024.
30	SAN Diego Gas & Electric Company Top agencies Navy (Department of the Navy) IBWC (International Boundary and Water Commission U.S.-Mexico) DOJ (Department of Justice)	$22,276,548	0.7%	Rank history: #11 in FY2021, #42 in FY2022, #13 in FY2023 and #52 in FY2024; up 22 since FY2024.
31	County of Hardin Through Hardin County Water District NO. 1 Top agencies Army (Department of the Army)	$21,790,023	0.7%	Rank history: not on the FY2021–FY2023 lists and #93 in FY2024; up 62 since FY2024.
32	Philadelphia Authority for Industrial Development Top agencies Navy (Department of the Navy)	$21,776,063	0.7%	Rank history: #19 in FY2021 and not on the FY2022–FY2024 lists; up 74 since FY2024.
33	Oklahoma Gas and Electric Company Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) GSA (General Services Administration)	$20,664,536	0.6%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2024; up 23 since FY2024.
34	Emerald Coast Utility Services Inc. Top agencies USAF (Department of the Air Force)	$19,986,710	0.6%	Rank history: #32 in FY2021, #35 in FY2022, #34 in FY2023 and #32 in FY2024; down 2 since FY2024.
35	Washington Suburban Sanitary Commission Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) Smithsonian (Smithsonian Institution)	$19,691,336	0.6%	Rank history: #46 in FY2021, #40 in FY2022, #41 in FY2023 and #34 in FY2024; down 1 since FY2024.
36	Sho-Me Power Electric Cooperative Top agencies Army (Department of the Army)	$19,091,045	0.6%	Rank history: #29 in FY2021, #36 in FY2022, #40 in FY2023 and #33 in FY2024; down 3 since FY2024.
37	RIO Grande Electric Cooperative, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$18,737,632	0.6%	Rank history: #18 in FY2021, #31 in FY2022, #38 in FY2023 and #31 in FY2024; down 6 since FY2024.
38	United Energy Corporation Through United Energy Trading, LLC Top agencies GSA (General Services Administration) NASA (National Aeronautics and Space Administration) VA (Department of Veterans Affairs)	$18,189,080	0.6%	Rank history: not on the FY2021–FY2024 lists; up 83 since FY2024.
39	Sandhills Utility Services, LLC Top agencies Army (Department of the Army)	$17,707,095	0.5%	Rank history: #22 in FY2021, #24 in FY2022, #23 in FY2023 and #26 in FY2024; down 13 since FY2024.
40	Black Hills Corporation 2 awardees, including Black Hills Service Company, LLC and Black Hills Utility Holdings Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOI (Department of the Interior)	$17,520,403	0.5%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 31 since FY2024.
41	Fort Riley Utility Services, Inc. Top agencies Army (Department of the Army)	$17,289,163	0.5%	Rank history: #28 in FY2021, #30 in FY2022, #29 in FY2023 and #22 in FY2024; down 19 since FY2024.
42	Florida Power & Light Company Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice) Army (Department of the Army)	$16,703,630	0.5%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2024; down 4 since FY2024.
43	Choctawhatchee Electric Cooperative Inc. Top agencies USAF (Department of the Air Force)	$16,622,502	0.5%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 5 since FY2024.
44	Firstenergy Corp. 6 awardees, including The Potomac Edison Co, The Cleveland Electric Illuminating Co and Ohio Edison Company Top agencies DOJ (Department of Justice) NASA (National Aeronautics and Space Administration) Treasury (Department of the Treasury)	$16,453,209	0.5%	Rank history: #21 in FY2021, #26 in FY2022, #22 in FY2023 and #37 in FY2024; down 7 since FY2024.
45	Chugach Electric Association, Inc. Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$16,293,155	0.5%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #39 in FY2024; down 6 since FY2024.
46	Canoochee Electric Membership Corp Top agencies Army (Department of the Army)	$14,915,981	0.5%	Rank history: #68 in FY2021, #78 in FY2022, #57 in FY2023 and #46 in FY2024; unchanged since FY2024.
47	Enstar Natural Gas Company, LLC Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$14,783,923	0.5%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2024; up 30 since FY2024.
48	The AES Corporation 2 awardees, including The Dayton Power and Light Company Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$14,736,291	0.5%	Rank history: #94 in FY2021, #79 in FY2022, #68 in FY2023 and #79 in FY2024; up 31 since FY2024.
49	Base Utilities Inc. Top agencies USAF (Department of the Air Force)	$13,816,793	0.4%	Rank history: #33 in FY2021, #49 in FY2022, #47 in FY2023 and #43 in FY2024; down 6 since FY2024.
50	Gulf Coast Electric Cooperative Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$13,132,141	0.4%	Rank history: #42 in FY2021, #3 in FY2022, #49 in FY2023 and #69 in FY2024; up 19 since FY2024.
51	Hawaiian Electric Company, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$12,861,023	0.4%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; up 13 since FY2024.
52	Monongahela Power Company Top agencies DOJ (Department of Justice) DOE (Department of Energy) Treasury (Department of the Treasury)	$11,957,173	0.4%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; down 2 since FY2024.
53	Entergy Louisiana LLC Top agencies Army (Department of the Army) DOT (Department of Transportation) DOI (Department of the Interior)	$11,658,099	0.4%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; down 4 since FY2024.
54	American Water Enterprises, LLC Top agencies Army (Department of the Army)	$11,349,474	0.4%	Rank history: #82 in FY2021, #66 in FY2022, #44 in FY2023 and #63 in FY2024; up 9 since FY2024.
55	Riverbend Water Resources District Top agencies Army (Department of the Army)	$11,312,863	0.3%	Rank history: #84 in FY2021, #84 in FY2022, #76 in FY2023 and #66 in FY2024; up 11 since FY2024.
56	Nolin Rural Electric Cooperative Corporation Top agencies Army (Department of the Army)	$11,220,809	0.3%	Rank history: #80 in FY2021, #46 in FY2022, #43 in FY2023 and #47 in FY2024; down 9 since FY2024.
57	Samchully Co.,Ltd. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$10,730,953	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #52 in FY2023 and #65 in FY2024; up 8 since FY2024.
58	The Navajo Nation Tribal Government Through Navajo Tribal Utility Authority Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$10,583,946	0.3%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and #61 in FY2024; up 3 since FY2024.
59	Cobb Electric Membership Corporation 2 awardees, including Gas South, LLC Top agencies NASA (National Aeronautics and Space Administration) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$9,800,552	0.3%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and #58 in FY2024; down 1 since FY2024.
60	Omega Pipeline Company, LLC Top agencies Army (Department of the Army)	$9,467,516	0.3%	Rank history: #50 in FY2021, #59 in FY2022, #61 in FY2023 and #68 in FY2024; up 8 since FY2024.
61	Buyo Gas Co.,Ltd. 2 awardees, including Buyo Ekika Gas Co., Ltd. Top agencies USAF (Department of the Air Force)	$9,191,042	0.3%	Rank history: #67 in FY2021, #39 in FY2022, #39 in FY2023 and #44 in FY2024; down 17 since FY2024.
62	Teco Energy Inc. 2 awardees, including New Mexico Gas Company, Inc. and Peoples Gas System, Inc. Top agencies GSA (General Services Administration) USAF (Department of the Air Force) DOI (Department of the Interior)	$9,113,934	0.3%	Rank history: not on the FY2021–FY2024 lists; up 115 since FY2024.
63	Tokyo Gas Co.,Ltd. Top agencies Navy (Department of the Navy)	$9,035,078	0.3%	Rank history: not on the FY2021 list, #15 in FY2022, #15 in FY2023 and #36 in FY2024; down 27 since FY2024.
64	Brunswick Electric Membership Corporation Top agencies Army (Department of the Army)	$8,855,344	0.3%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2024; up 9 since FY2024.
65	Florida Governmental Utility Authority Top agencies USAF (Department of the Air Force)	$8,388,632	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
66	Central Coast Water Authority Top agencies USAF (Department of the Air Force)	$7,949,191	0.2%	Rank history: #60 in FY2021, #87 in FY2022, #67 in FY2023 and #67 in FY2024; up 1 since FY2024.
67	Dominion Privatization South Carolina LLC Top agencies Army (Department of the Army)	$7,930,095	0.2%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2024; down 16 since FY2024.
68	Tiger Natural Gas Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOJ (Department of Justice)	$7,635,478	0.2%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; down 6 since FY2024.
69	One Gas, Inc. 3 awardees Top agencies Army (Department of the Army) DOJ (Department of Justice) NARA (National Archives and Records Administration)	$7,632,637	0.2%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2024; up 15 since FY2024.
70	City of Aberdeen Top agencies Army (Department of the Army)	$7,553,816	0.2%	Rank history: #69 in FY2021, #82 in FY2022, #74 in FY2023 and #54 in FY2024; down 16 since FY2024.
71	Flint Electric Membership Corp Top agencies Army (Department of the Army)	$7,493,915	0.2%	Rank history: #73 in FY2021, #56 in FY2022, #70 in FY2023 and #55 in FY2024; down 16 since FY2024.
72	City Public Services Board Top agencies USAF (Department of the Air Force)	$7,377,068	0.2%	Rank history: #57 in FY2021, #65 in FY2022, #77 in FY2023 and #57 in FY2024; down 15 since FY2024.
73	PG&E Corporation Through Pacific Energy Fuels Company Top agencies Army (Department of the Army)	$6,812,479	0.2%	Rank history: #13 in FY2021, #27 in FY2022, #25 in FY2023 and #41 in FY2024; down 32 since FY2024.
74	Verendrye Electric Cooperative Inc. Top agencies USAF (Department of the Air Force)	$6,632,144	0.2%	Rank history: #97 in FY2021, not on the FY2022 list, #97 in FY2023 and #78 in FY2024; up 4 since FY2024.
75	Bay State Utility Services, LLC Top agencies USAF (Department of the Air Force)	$5,942,293	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
76	El Paso Electric Company Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice) IBWC (International Boundary and Water Commission U.S.-Mexico)	$5,632,820	0.2%	Rank history: not on the FY2021–FY2024 lists; up 66 since FY2024.
77	Tama City Hall Top agencies USAF (Department of the Air Force)	$5,592,009	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #88 in FY2023 and #85 in FY2024; up 8 since FY2024.
78	Southern Maryland Electric Cooperative, Inc. Top agencies Navy (Department of the Navy)	$5,573,995	0.2%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023 and not on the FY2024 list; up 133 since FY2024.
79	Constellation Newenergy - Gas Division, LLC Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) RRB (Railroad Retirement Board)	$5,538,598	0.2%	Rank history: not on the FY2021–FY2024 lists; up 58 since FY2024.
80	Mansfield Power & Gas LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) GSA (General Services Administration)	$5,521,420	0.2%	Rank history: not on the FY2021–FY2024 lists; up 173 since FY2024.
81	UNS Energy Corporation 3 awardees, including Tucson Electric Power Company, Uns Electric, Inc. and Central Hudson Gas & Electric Corporation Top agencies USAF (Department of the Air Force) IBWC (International Boundary and Water Commission U.S.-Mexico) DOJ (Department of Justice)	$5,490,420	0.2%	Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
82	Pyeongtaek-Si Water and Sewage Business Place Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$5,478,978	0.2%	Rank history: #77 in FY2021 and not on the FY2022–FY2024 lists; up 38 since FY2024.
83	Laclede Electric Cooperative Top agencies Army (Department of the Army)	$5,460,836	0.2%	Rank history: #75 in FY2021, #81 in FY2022, #72 in FY2023 and #90 in FY2024; up 7 since FY2024.
84	American Electric Power Company, Inc. Top agencies DOJ (Department of Justice) DOL (Department of Labor) HHS (Department of Health and Human Services)	$5,117,109	0.2%	Rank history: #25 in FY2021, #20 in FY2022, #10 in FY2023 and #13 in FY2024; down 71 since FY2024.
85	South Granville Water & Sewer Auth Top agencies DOJ (Department of Justice)	$5,014,867	0.2%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 12 since FY2024.
86	Dominion Energy South Carolina, Inc. Top agencies DOJ (Department of Justice) Army (Department of the Army) USAF (Department of the Air Force)	$5,007,183	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
87	City of Wildwood City Hall Top agencies DOJ (Department of Justice)	$4,888,515	0.2%	Rank history: not on the FY2021–FY2024 lists; up 37 since FY2024.
88	ANCHOR-41 Construction LLC Top agencies VA (Department of Veterans Affairs)	$4,667,521	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Ohio Valley Electrical Services, LLC Through Ohio Valley Electric Corporation Top agencies DOE (Department of Energy)	$4,503,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 39 since FY2024.
90	Washington Hospital Center Corporation Top agencies VA (Department of Veterans Affairs)	$4,457,850	0.1%	Rank history: not on the FY2021–FY2024 lists; up 13 since FY2024.
91	Pural Water Specialty Co. , Inc. Top agencies Army (Department of the Army)	$4,407,623	0.1%	Rank history: #59 in FY2021, #97 in FY2022, #66 in FY2023 and #86 in FY2024; down 5 since FY2024.
92	Pinnacle West Capital Corporation Through Arizona Public Service Company Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior) DOJ (Department of Justice)	$4,293,641	0.1%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023 and #96 in FY2024; up 4 since FY2024.
93	Enspire Energy, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$4,236,128	0.1%	Rank history: #85 in FY2021, #88 in FY2022, #93 in FY2023 and #83 in FY2024; down 10 since FY2024.
94	P D R Properties, Inc. Top agencies Army (Department of the Army)	$4,197,641	0.1%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2024; down 5 since FY2024.
95	Freestate Electric Cooperative, Inc. Top agencies Army (Department of the Army)	$4,104,640	0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #82 in FY2024; down 13 since FY2024.
96	OGE Energy Corp 2 awardees, including Arkansas Oklahoma Gas Corporation Top agencies USAF (Department of the Air Force) DOE (Department of Energy) DOJ (Department of Justice)	$4,099,706	0.1%	Rank history: #40 in FY2021, #37 in FY2022, #36 in FY2023 and #27 in FY2024; down 69 since FY2024.
97	Vandenberg Solar I, LLC Top agencies USAF (Department of the Air Force)	$4,001,602	0.1%	Rank history: #89 in FY2021, #96 in FY2022, #100 in FY2023 and #95 in FY2024; down 2 since FY2024.
98	Omaha Public Power District Top agencies USAF (Department of the Air Force)	$4,000,014	0.1%	Rank history: not on the FY2021–FY2024 lists; up 24 since FY2024.
99	Sumter Electric Cooperative, Inc. Top agencies DOJ (Department of Justice)	$3,921,913	0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and not on the FY2024 list; up 48 since FY2024.
100	Golden Valley Electric Association Inc. Top agencies Army (Department of the Army)	$3,721,029	0.1%	Rank history: #41 in FY2021, #45 in FY2022, #48 in FY2023 and #35 in FY2024; down 65 since FY2024.

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100 of 808 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC S1

Code	Net obligations	Largest contractor
S112 Electric Services	$1,522,922,839	Doyon Utilities, LLC
S114 Water Services	$626,400,532	American Water Works Company Inc.
S119 Other Utilities	$457,113,036	Foreign Utility Consolidated Reporting
S111 Gas Services	$235,638,764	NRG Business Marketing LLC

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 $3.24 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

Who were the top 10 PSC S1 contractors in FY2025?

1. Foreign Utility Consolidated Reporting ($234M), 2. American Water Works Company Inc. ($208M), 3. L3Harris Technologies, Inc. ($199M), 4. Dominion Resources Inc. ($148M), 5. Doyon Utilities, LLC ($117M), 6. Amber Infrastructure LLC ($116M), 7. Constellation Newenergy, Inc. ($112M), 8. Fort Bliss Water Services Company ($95.4M), 9. Potomac Electric Power Co ($93.1M), 10. WGL Energy Services Inc. ($88.4M).

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