Top 100 Contractors in PSC S1: Utilities, FY2023

Name: Top 100 Contractors in PSC S1: Utilities, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 40% of FY2023 PSC S1 contract dollars

Contract obligations: $2,859,091,684 Net of deobligations, by contracts coded PSC S1 or a code under it
Contractors: 898 Parent companies with an obligation
Largest contractor: Foreign Utility Consolidated Reporting $236 million, 7.9% 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)	$235,948,476	7.9%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2024 and #1 in FY2025; up 1 since FY2022.
2	American Water Works Company Inc. 8 awardees, including American Water Operations and Maintenance, LLC, American Water Military Services, LLC and California-American Water Company Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$190,794,869	6.4%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2024 and #2 in FY2025; down 1 since FY2022.
3	L3Harris Technologies, Inc. Through Harris Corporation Top agencies DOT (Department of Transportation)	$137,408,295	4.6%	Rank history: #4 in FY2021, #5 in FY2022, #3 in FY2024 and #3 in FY2025; up 2 since FY2022.
4	Exelon Corporation 9 awardees, including Potomac Electric Power Co, Constellation Newenergy, Inc. and Baltimore Gas and Electric Company Top agencies HHS (Department of Health and Human Services) Smithsonian (Smithsonian Institution) NASA (National Aeronautics and Space Administration)	$121,429,139	4.0%	Rank history: #3 in FY2021, #7 in FY2022, #11 in FY2024 and not on the FY2025 list; up 3 since FY2022.
5	Dominion Resources Inc. 13 awardees, including Dominion Privatization Texas, LLC, Virginia Electric and Power Company and Dominion Energy South Carolina, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOJ (Department of Justice)	$118,963,132	4.0%	Rank history: #6 in FY2021, #4 in FY2022, #6 in FY2024 and #4 in FY2025; down 1 since FY2022.
6	WGL Energy Services Inc. 3 awardees, including Washington Gas Light Company and Semco Energy, Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) GSA (General Services Administration)	$114,890,672	3.8%	Rank history: #8 in FY2021, #9 in FY2022, #9 in FY2024 and #10 in FY2025; up 3 since FY2022.
7	Doyon Utilities LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$106,496,980	3.5%	Rank history: #5 in FY2021, #6 in FY2022, #4 in FY2024 and #5 in FY2025; down 1 since FY2022.
8	Old North Utility Services Inc. 5 awardees, including Old Dominion Utility Services, Inc., Terrapin Utility Services, Inc. and Palmetto State Utility Services, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$66,971,150	2.2%	Rank history: #7 in FY2021, #8 in FY2022, #23 in FY2024 and not on the FY2025 list; unchanged since FY2022.
9	Water Authority Busan Metropolitan City Korea 7 awardees, including Korea Electric Power Corporation, Daegu Metropolitan City and Headquarters, Daegu Waterworks Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$53,790,227	1.8%	Rank history: #9 in FY2021, #14 in FY2022, #12 in FY2024 and #19 in FY2025; up 5 since FY2022.
10	American Electric Power Company, Inc. 5 awardees, including AEP Energy Inc., Public Service Company of Oklahoma and Ohio Valley Electric Corporation Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) DOE (Department of Energy)	$53,732,831	1.8%	Rank history: #25 in FY2021, #20 in FY2022, #13 in FY2024 and #84 in FY2025; up 10 since FY2022.
11	Duke Energy Corporation 5 awardees, including Duke Energy Progress, LLC, Piedmont Natural Gas Company, Inc. and Duke Energy Carolinas, LLC Top agencies Navy (Department of the Navy) DOJ (Department of Justice) USAF (Department of the Air Force)	$52,485,917	1.7%	Rank history: #30 in FY2021, #11 in FY2022, #24 in FY2024 and #24 in FY2025; unchanged since FY2022.
12	Nextera Energy Inc. 6 awardees, including Gexa Energy, LP, Florida Power & Light Company and Gulf Power Company Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) GSA (General Services Administration)	$50,527,032	1.7%	Rank history: #16 in FY2021, #16 in FY2022, #19 in FY2024 and #27 in FY2025; up 4 since FY2022.
13	SAN Diego Gas & Electric Company 3 awardees, including Southern California Gas Company Top agencies Navy (Department of the Navy) IBWC (International Boundary and Water Commission U.S.-Mexico) DOJ (Department of Justice)	$49,449,148	1.6%	Rank history: #11 in FY2021, #42 in FY2022, #52 in FY2024 and #30 in FY2025; up 29 since FY2022.
14	Consolidated Edison Inc. Through Consolidated Edison Company of New York, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) SSA (Social Security Administration)	$44,781,683	1.5%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2024 and #28 in FY2025; new.
15	Tokyo Gas Co.,Ltd. Top agencies Navy (Department of the Navy)	$39,773,936	1.3%	Rank history: not on the FY2021 list, #15 in FY2022, #36 in FY2024 and #63 in FY2025; unchanged since FY2022.
16	Georgia Power Company 6 awardees, including Alabama Power Company, Southern Company Gas and Mississippi Power Co Top agencies Army (Department of the Army) GSA (General Services Administration) DOJ (Department of Justice)	$38,854,885	1.3%	Rank history: #15 in FY2021, #10 in FY2022, #15 in FY2024 and #13 in FY2025; down 6 since FY2022.
17	Entergy Corporation 3 awardees, including Entergy Louisiana, LLC and Entergy Arkansas, LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) USAF (Department of the Air Force)	$38,674,708	1.3%	Rank history: #31 in FY2021, #41 in FY2022, #70 in FY2024 and not on the FY2025 list; up 24 since FY2022.
18	Keenan FT Detrick Energy LLC Top agencies Army (Department of the Army)	$36,645,765	1.2%	Rank history: #10 in FY2021, #12 in FY2022, #14 in FY2024 and #15 in FY2025; down 6 since FY2022.
19	Centrica PLC 2 awardees, including Direct Energy Business LLC and NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOJ (Department of Justice)	$34,048,095	1.1%	Rank history: #12 in FY2021, #70 in FY2022, #16 in FY2024 and not on the FY2025 list; up 51 since FY2022.
20	City Light & Power Aberdeen, LLC Top agencies Army (Department of the Army)	$28,615,725	1.0%	Rank history: #27 in FY2021, #22 in FY2022, #60 in FY2024 and not on the FY2025 list; up 2 since FY2022.
21	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$28,424,519	0.9%	Rank history: #14 in FY2021, #19 in FY2022, #21 in FY2024 and #23 in FY2025; down 2 since FY2022.
22	Firstenergy Corporation 8 awardees, including Monongahela Power Company, The Cleveland Electric Illuminating Co and The Potomac Edison Co Top agencies DOJ (Department of Justice) NASA (National Aeronautics and Space Administration) Treasury (Department of the Treasury)	$27,540,264	0.9%	Rank history: #21 in FY2021, #26 in FY2022, #37 in FY2024 and #44 in FY2025; up 4 since FY2022.
23	Sandhills Utility Services, LLC Top agencies Army (Department of the Army)	$25,893,515	0.9%	Rank history: #22 in FY2021, #24 in FY2022, #26 in FY2024 and #39 in FY2025; up 1 since FY2022.
24	Oklahoma City Water Utilities Trust Top agencies USAF (Department of the Air Force)	$25,578,798	0.9%	Rank history: not on the FY2021 list, #51 in FY2022, #18 in FY2024 and #20 in FY2025; up 27 since FY2022.
25	PG&E Corporation 2 awardees, including Pacific Gas and Electric Company and Pacific Energy Fuels Company Top agencies Army (Department of the Army) DOJ (Department of Justice) NASA (National Aeronautics and Space Administration)	$23,905,106	0.8%	Rank history: #13 in FY2021, #27 in FY2022, #41 in FY2024 and #73 in FY2025; up 2 since FY2022.
26	Tiger Natural Gas, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) DOJ (Department of Justice)	$23,660,214	0.8%	Rank history: #55 in FY2021, #53 in FY2022 and not on the FY2024–FY2025 lists; up 27 since FY2022.
27	General Dynamics Corporation 3 awardees, including General Dynamics Information Technology, Inc. and Black Warrior Electric Membership Corporation Top agencies DOT (Department of Transportation) Army (Department of the Army)	$23,162,267	0.8%	Rank history: #17 in FY2021, #50 in FY2022, #17 in FY2024 and #22 in FY2025; up 23 since FY2022.
28	NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) NARA (National Archives and Records Administration)	$22,197,567	0.7%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #26 in FY2025; up 192 since FY2022.
29	Fort Riley Utility Services, Inc. Top agencies Army (Department of the Army)	$20,028,532	0.7%	Rank history: #28 in FY2021, #30 in FY2022, #22 in FY2024 and #41 in FY2025; up 1 since FY2022.
30	Pinnacle West Capital Corporation 2 awardees, including Arizona Public Service Company and Liberty Utilities (Litchfield Park Water & Sewer) Corp. Top agencies DOI (Department of the Interior) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$19,781,348	0.7%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2024 and #92 in FY2025; up 77 since FY2022.
31	City Light & Power Ftr, LLC Top agencies Army (Department of the Army)	$19,153,096	0.6%	Rank history: #52 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; up 12 since FY2022.
32	City Light & Power Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$19,030,970	0.6%	Rank history: #20 in FY2021, #17 in FY2022, #25 in FY2024 and not on the FY2025 list; down 15 since FY2022.
33	City Light & Power Jblm LLC Top agencies Army (Department of the Army)	$18,784,434	0.6%	Rank history: #43 in FY2021, #52 in FY2022, #81 in FY2024 and not on the FY2025 list; up 19 since FY2022.
34	Emerald Coast Utility Services Inc. Top agencies USAF (Department of the Air Force)	$17,597,988	0.6%	Rank history: #32 in FY2021, #35 in FY2022, #32 in FY2024 and #34 in FY2025; up 1 since FY2022.
35	Fort Bliss Water Services Company Top agencies Army (Department of the Army)	$17,595,504	0.6%	Rank history: not on the FY2021 list, #86 in FY2022, #7 in FY2024 and #8 in FY2025; up 51 since FY2022.
36	OGE Energy Corp 2 awardees, including Oklahoma Gas and Electric Company Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) GSA (General Services Administration)	$17,422,190	0.6%	Rank history: #40 in FY2021, #37 in FY2022, #27 in FY2024 and #96 in FY2025; up 1 since FY2022.
37	Tetra Tech, Inc. 2 awardees, including Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development) USAF (Department of the Air Force)	$17,200,315	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 366 since FY2022.
38	RIO Grande Electric Cooperative, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$16,921,362	0.6%	Rank history: #18 in FY2021, #31 in FY2022, #31 in FY2024 and #37 in FY2025; down 7 since FY2022.
39	Buyo Gas Co.,Ltd. 2 awardees, including Buyo Ekika Gas Co., Ltd. Top agencies USAF (Department of the Air Force)	$16,869,032	0.6%	Rank history: #67 in FY2021, #39 in FY2022, #44 in FY2024 and #61 in FY2025; unchanged since FY2022.
40	Sho-Me Power Electric Cooperative Top agencies Army (Department of the Army)	$16,862,445	0.6%	Rank history: #29 in FY2021, #36 in FY2022, #33 in FY2024 and #36 in FY2025; down 4 since FY2022.
41	Washington Suburban Sanitary Commission Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) Smithsonian (Smithsonian Institution)	$16,185,174	0.5%	Rank history: #46 in FY2021, #40 in FY2022, #34 in FY2024 and #35 in FY2025; down 1 since FY2022.
42	Chugach Electric Association, Inc. Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$16,181,429	0.5%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2024 and #45 in FY2025; up 438 since FY2022.
43	Nolin Rural Electric Cooperative Corporation Top agencies Army (Department of the Army)	$15,760,947	0.5%	Rank history: #80 in FY2021, #46 in FY2022, #47 in FY2024 and #56 in FY2025; up 3 since FY2022.
44	American Water Enterprises, LLC Top agencies Army (Department of the Army)	$15,182,316	0.5%	Rank history: #82 in FY2021, #66 in FY2022, #63 in FY2024 and #54 in FY2025; up 22 since FY2022.
45	City Light & Power FTC LLC Top agencies Army (Department of the Army)	$14,831,957	0.5%	Rank history: #38 in FY2021, #28 in FY2022, #94 in FY2024 and not on the FY2025 list; down 17 since FY2022.
46	Jacobs Engineering Group Inc. Through Ch2M Hill Constructors, Inc. Top agencies Army (Department of the Army)	$14,757,138	0.5%	Rank history: #26 in FY2021, #32 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
47	Base Utilities Inc. Top agencies USAF (Department of the Air Force)	$14,193,013	0.5%	Rank history: #33 in FY2021, #49 in FY2022, #43 in FY2024 and #49 in FY2025; up 2 since FY2022.
48	Golden Valley Electric Association Inc. Top agencies Army (Department of the Army)	$14,144,409	0.5%	Rank history: #41 in FY2021, #45 in FY2022, #35 in FY2024 and #100 in FY2025; down 3 since FY2022.
49	Gulf Coast Electric Cooperative Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$13,623,983	0.5%	Rank history: #42 in FY2021, #3 in FY2022, #69 in FY2024 and #50 in FY2025; down 46 since FY2022.
50	Engie Resources LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) RRB (Railroad Retirement Board)	$13,381,044	0.4%	Rank history: #62 in FY2021, #18 in FY2022, #28 in FY2024 and #21 in FY2025; down 32 since FY2022.
51	Jacobs Government Services Company Through Ch2M Hill Constructors, Inc. Top agencies Army (Department of the Army)	$13,249,589	0.4%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2024 and #17 in FY2025; new.
52	Samchully Co.,Ltd. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$11,911,231	0.4%	Rank history: not on the FY2021 list, #60 in FY2022, #65 in FY2024 and #57 in FY2025; up 8 since FY2022.
53	Xcel Energy 4 awardees, including Southwestern Public Service Company, Public Service Company of Colorado and Northern States Power Company Top agencies DOI (Department of the Interior) DOE (Department of Energy) Treasury (Department of the Treasury)	$11,434,388	0.4%	Rank history: #61 in FY2021, #61 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
54	Valley Electric Association Inc. Top agencies USAF (Department of the Air Force)	$10,836,899	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 47 since FY2022.
55	Energetic SPA Top agencies Army (Department of the Army)	$10,590,193	0.4%	Rank history: #63 in FY2021, #47 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
56	Choctawhatchee Electric Cooperative, Inc. Top agencies USAF (Department of the Air Force)	$10,529,663	0.4%	Rank history: #48 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
57	Canoochee Electric Membership Corp Top agencies Army (Department of the Army)	$10,367,335	0.3%	Rank history: #68 in FY2021, #78 in FY2022, #46 in FY2024 and #46 in FY2025; up 21 since FY2022.
58	Centerpoint Energy, Inc. 5 awardees, including Centerpoint Energy Resources Corp., Vectren Energy Delivery of Ohio, LLC and Vectren LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOJ (Department of Justice)	$10,339,857	0.3%	Rank history: #37 in FY2021, #29 in FY2022 and not on the FY2024–FY2025 lists; down 29 since FY2022.
59	Dominion Privatization Virginia, LLC Top agencies Army (Department of the Army)	$10,159,072	0.3%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2024 and not on the FY2025 list; new.
60	City Light & Power Awp, LLC Top agencies Army (Department of the Army)	$9,982,505	0.3%	Rank history: #49 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
61	Omega Pipeline Company, LLC Top agencies Army (Department of the Army)	$9,831,825	0.3%	Rank history: #50 in FY2021, #59 in FY2022, #68 in FY2024 and #60 in FY2025; down 2 since FY2022.
62	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)	$9,675,873	0.3%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2024 and #59 in FY2025; up 70 since FY2022.
63	The Navajo Nation Tribal Government Through Navajo Tribal Utility Authority Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$9,065,172	0.3%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2024 and #58 in FY2025; new.
64	Augusta-Richmond County Government Top agencies Army (Department of the Army)	$8,802,885	0.3%	Rank history: #39 in FY2021, #44 in FY2022, #42 in FY2024 and #29 in FY2025; down 20 since FY2022.
65	Hawaii Electric Light Company Inc. 2 awardees, including Hawaiian Electric Company, Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) USAF (Department of the Air Force)	$7,846,959	0.3%	Rank history: #72 in FY2021, #85 in FY2022 and not on the FY2024–FY2025 lists; up 20 since FY2022.
66	Pural Water Specialty Co. , Inc. Top agencies Army (Department of the Army)	$7,550,909	0.3%	Rank history: #59 in FY2021, #97 in FY2022, #86 in FY2024 and #91 in FY2025; up 31 since FY2022.
67	Central Coast Water Authority Top agencies USAF (Department of the Air Force)	$7,337,104	0.2%	Rank history: #60 in FY2021, #87 in FY2022, #67 in FY2024 and #66 in FY2025; up 20 since FY2022.
68	The AES Corporation 2 awardees, including The Dayton Power and Light Company and Indianapolis Power & Light Co Top agencies USAF (Department of the Air Force) DECA (Defense Commissary Agency)	$7,122,291	0.2%	Rank history: #94 in FY2021, #79 in FY2022, #79 in FY2024 and #48 in FY2025; up 11 since FY2022.
69	Edison International 2 awardees, including Southern California Edison Company Top agencies Navy (Department of the Navy) DOJ (Department of Justice) NARA (National Archives and Records Administration)	$7,071,445	0.2%	Rank history: #90 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
70	Flint Electric Membership Corp Top agencies Army (Department of the Army)	$7,062,714	0.2%	Rank history: #73 in FY2021, #56 in FY2022, #55 in FY2024 and #71 in FY2025; down 14 since FY2022.
71	Direct Energy Business LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) DOJ (Department of Justice)	$6,840,015	0.2%	Rank history: not on the FY2021 list, #99 in FY2022, #40 in FY2024 and #18 in FY2025; up 28 since FY2022.
72	Laclede Electric Cooperative Top agencies Army (Department of the Army)	$6,421,179	0.2%	Rank history: #75 in FY2021, #81 in FY2022, #90 in FY2024 and #83 in FY2025; up 9 since FY2022.
73	Dynegy Energy Services (EAST) LLC 3 awardees, including Illinois Power Marketing Company, LLC and TXU Energy Retail Company LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) Army (Department of the Army)	$6,197,444	0.2%	Rank history: #76 in FY2021, #55 in FY2022, #75 in FY2024 and not on the FY2025 list; down 18 since FY2022.
74	City of Aberdeen Top agencies Army (Department of the Army)	$6,030,552	0.2%	Rank history: #69 in FY2021, #82 in FY2022, #54 in FY2024 and #70 in FY2025; up 8 since FY2022.
75	Florida Governmental Utility Authority Top agencies USAF (Department of the Air Force)	$5,938,993	0.2%	Rank history: #35 in FY2021, #62 in FY2022, #72 in FY2024 and not on the FY2025 list; down 13 since FY2022.
76	Riverbend Water Resources District Top agencies Army (Department of the Army)	$5,907,589	0.2%	Rank history: #84 in FY2021, #84 in FY2022, #66 in FY2024 and #55 in FY2025; up 8 since FY2022.
77	City Public Services Board Top agencies USAF (Department of the Air Force)	$5,866,684	0.2%	Rank history: #57 in FY2021, #65 in FY2022, #57 in FY2024 and #72 in FY2025; down 12 since FY2022.
78	Freestate Electric Cooperative, Inc. Top agencies Army (Department of the Army)	$5,707,638	0.2%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2024 and #95 in FY2025; up 36 since FY2022.
79	Southern Maryland Electric Cooperative, Inc. Top agencies Navy (Department of the Navy)	$5,278,527	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #78 in FY2025; up 197 since FY2022.
80	National Grid PLC 3 awardees, including National Grid USA Service Company, Inc. and Keyspan Gas East Corporation Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOT (Department of Transportation)	$5,196,518	0.2%	Rank history: #23 in FY2021, #38 in FY2022 and not on the FY2024–FY2025 lists; down 42 since FY2022.
81	Sumter Electric Cooperative, Inc. Top agencies DOJ (Department of Justice)	$5,191,852	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #99 in FY2025; up 24 since FY2022.
82	Fayza-Lead Construction Inc. Top agencies VA (Department of Veterans Affairs)	$4,972,894	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	One Gas Inc. 3 awardees Top agencies Army (Department of the Army) DOJ (Department of Justice) NARA (National Archives and Records Administration)	$4,898,270	0.2%	Rank history: not on the FY2021 list, #89 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
84	UGI Corporation 4 awardees, including UGI Energy Services, LLC and Mountaineer Gas Co Top agencies VA (Department of Veterans Affairs) SSA (Social Security Administration) DOJ (Department of Justice)	$4,746,471	0.2%	Rank history: not on the FY2021 list, #71 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
85	City of Leavenworth 2 awardees, including City of Leavenworth KS Top agencies DOJ (Department of Justice) Army (Department of the Army)	$4,671,658	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 75 since FY2022.
86	Hosei Co., Ltd. Top agencies Navy (Department of the Navy)	$4,665,312	0.2%	Rank history: not on the FY2021 list, #80 in FY2022, #91 in FY2024 and not on the FY2025 list; down 6 since FY2022.
87	Fincantieri Marine Systems North America Inc. 2 awardees, including A.i.m. Energy S.R.L. and Comune DI Vicenza Top agencies Army (Department of the Army)	$4,663,920	0.2%	Rank history: not on the FY2021 list, #64 in FY2022 and not on the FY2024–FY2025 lists; down 23 since FY2022.
88	Tama City Hall Top agencies USAF (Department of the Air Force)	$4,532,169	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #85 in FY2024 and #77 in FY2025; down 11 since FY2022.
89	Plumas-Sierra Rural Electric Co-Operative Top agencies Army (Department of the Army) DOJ (Department of Justice)	$4,492,521	0.1%	Rank history: not on the FY2021 list, #91 in FY2022, #92 in FY2024 and not on the FY2025 list; up 2 since FY2022.
90	Sage Energy Trading LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOE (Department of Energy)	$4,487,753	0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and not on the FY2025 list; up 206 since FY2022.
91	The Bank of New York Mellon Corporation Top agencies VA (Department of Veterans Affairs)	$4,460,213	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	Navajo Tribal Utility Authority Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$4,439,841	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 69 since FY2022.
93	Enspire Energy, LLC Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$4,393,545	0.1%	Rank history: #85 in FY2021, #88 in FY2022, #83 in FY2024 and #93 in FY2025; down 5 since FY2022.
94	Griffiss Utility Services Corporation Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$4,389,903	0.1%	Rank history: #87 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 8 since FY2022.
95	City of Memphis Through Memphis Light Gas & Water Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice)	$4,287,855	0.1%	Rank history: #79 in FY2021, #90 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
96	General Dynamics Information Technology, Inc. Top agencies DOT (Department of Transportation)	$4,252,053	0.1%	Rank history: not on the FY2021 list, #23 in FY2022 and not on the FY2024–FY2025 lists; down 73 since FY2022.
97	Verendrye Electric Cooperative Inc. Top agencies USAF (Department of the Air Force)	$4,163,313	0.1%	Rank history: #97 in FY2021, not on the FY2022 list, #78 in FY2024 and #74 in FY2025; up 6 since FY2022.
98	Hardin County Water District NO. 1 Top agencies Army (Department of the Army)	$4,110,862	0.1%	Rank history: #56 in FY2021, #69 in FY2022 and not on the FY2024–FY2025 lists; down 29 since FY2022.
99	Board of Water Commissioners of Columbus Top agencies Army (Department of the Army)	$4,053,664	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 176 since FY2022.
100	Vandenberg Solar I, LLC Top agencies USAF (Department of the Air Force)	$4,013,634	0.1%	Rank history: #89 in FY2021, #96 in FY2022, #95 in FY2024 and #97 in FY2025; down 4 since FY2022.

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100 of 898 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC S1

Code	Net obligations	Largest contractor
S112 Electric Services	$1,442,782,232	Foreign Utility Consolidated Reporting
S114 Water Services	$597,186,896	American Water Works Company Inc.
S111 Gas Services	$329,989,382	WGL Energy Services Inc.
S119 Other Utilities	$325,081,936	Foreign Utility Consolidated Reporting

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 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 FY2023?

1. Foreign Utility Consolidated Reporting ($236M), 2. American Water Works Company Inc. ($191M), 3. L3Harris Technologies, Inc. ($137M), 4. Exelon Corporation ($121M), 5. Dominion Resources Inc. ($119M), 6. WGL Energy Services Inc. ($115M), 7. Doyon Utilities LLC ($106M), 8. Old North Utility Services Inc. ($67M), 9. Water Authority Busan Metropolitan City Korea ($53.8M), 10. American Electric Power Company, Inc. ($53.7M).

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