Top 100 Contractors in PSC S1: Utilities, FY2024

Name: Top 100 Contractors in PSC S1: Utilities, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 43% of FY2024 PSC S1 contract dollars

Contract obligations: $2,842,428,446 Net of deobligations, by contracts coded PSC S1 or a code under it
Contractors: 912 Parent companies with an obligation
Largest contractor: American Water Works Company Inc. $247 million, 8.2% 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	American Water Works Company Inc. 11 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)	$246,810,923	8.2%	Rank history: #2 in FY2021, #1 in FY2022, #2 in FY2023 and #2 in FY2025; up 1 since FY2023.
2	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$199,039,911	6.6%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023 and #1 in FY2025; down 1 since FY2023.
3	L3Harris Technologies, Inc. Through Harris Corporation Top agencies DOT (Department of Transportation)	$165,614,384	5.5%	Rank history: #4 in FY2021, #5 in FY2022, #3 in FY2023 and #3 in FY2025; unchanged since FY2023.
4	Doyon Utilities LLC 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$119,898,392	4.0%	Rank history: #5 in FY2021, #6 in FY2022, #7 in FY2023 and #5 in FY2025; up 3 since FY2023.
5	Potomac Electric Power Co Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$115,633,717	3.9%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and #9 in FY2025; returned.
6	Dominion Resources Inc. 14 awardees, including Dominion Privatization Texas, LLC, Virginia Electric and Power Company and Dominion Privatization Virginia, LLC Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) DOJ (Department of Justice)	$102,361,427	3.4%	Rank history: #6 in FY2021, #4 in FY2022, #5 in FY2023 and #4 in FY2025; down 1 since FY2023.
7	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) Navy (Department of the Navy) USAF (Department of the Air Force)	$100,431,564	3.4%	Rank history: not on the FY2021 list, #86 in FY2022, #35 in FY2023 and #8 in FY2025; up 28 since FY2023.
8	Amber Infrastructure LLC 6 awardees, including City Light & Power Awp, LLC, City Light & Power Aberdeen, LLC and City Light & Power Jblm LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$85,589,961	2.9%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2025; new.
9	WGL Energy Services Inc. 5 awardees, including Washington Gas Light Company and Semco Energy, Inc. Top agencies GSA (General Services Administration) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$82,092,366	2.7%	Rank history: #8 in FY2021, #9 in FY2022, #6 in FY2023 and #10 in FY2025; down 3 since FY2023.
10	Pacific Gas and Electric Company Top agencies DOI (Department of the Interior) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$59,797,244	2.0%	Rank history: not on the FY2021–FY2023 lists and #11 in FY2025; new.
11	Exelon Corporation 7 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) VA (Department of Veterans Affairs)	$56,058,037	1.9%	Rank history: #3 in FY2021, #7 in FY2022, #4 in FY2023 and not on the FY2025 list; down 7 since FY2023.
12	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)	$52,391,174	1.8%	Rank history: #9 in FY2021, #14 in FY2022, #9 in FY2023 and #19 in FY2025; down 3 since FY2023.
13	American Electric Power Company, Inc. 3 awardees, including AEP Energy Inc. and AEP Texas Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) DOJ (Department of Justice)	$46,011,959	1.5%	Rank history: #25 in FY2021, #20 in FY2022, #10 in FY2023 and #84 in FY2025; down 3 since FY2023.
14	Keenan FT Detrick Energy LLC Top agencies Army (Department of the Army)	$42,730,544	1.4%	Rank history: #10 in FY2021, #12 in FY2022, #18 in FY2023 and #15 in FY2025; up 4 since FY2023.
15	Georgia Power Company 6 awardees, including Alabama Power Company, Southern Company Gas and Mississippi Power Co Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$42,416,910	1.4%	Rank history: #15 in FY2021, #10 in FY2022, #16 in FY2023 and #13 in FY2025; up 1 since FY2023.
16	Centrica PLC 2 awardees, including Direct Energy Business LLC and NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) DOT (Department of Transportation)	$41,073,525	1.4%	Rank history: #12 in FY2021, #70 in FY2022, #19 in FY2023 and not on the FY2025 list; up 3 since FY2023.
17	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. and Black Warrior Electric Membership Corporation Top agencies DOT (Department of Transportation) Army (Department of the Army)	$39,267,531	1.3%	Rank history: #17 in FY2021, #50 in FY2022, #27 in FY2023 and #22 in FY2025; up 10 since FY2023.
18	Oklahoma City Water Utilities Trust 2 awardees Top agencies USAF (Department of the Air Force)	$35,664,995	1.2%	Rank history: not on the FY2021 list, #51 in FY2022, #24 in FY2023 and #20 in FY2025; up 6 since FY2023.
19	Nextera Energy Inc. 7 awardees, including Gexa Energy, LP, Florida Power & Light Company and Gulf Power Company Top agencies USAF (Department of the Air Force) GSA (General Services Administration) NASA (National Aeronautics and Space Administration)	$34,604,597	1.2%	Rank history: #16 in FY2021, #16 in FY2022, #12 in FY2023 and #27 in FY2025; down 7 since FY2023.
20	Jacobs Government Services Company Through Ch2M Hill Constructors, Inc. Top agencies Army (Department of the Army)	$30,570,548	1.0%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023 and #17 in FY2025; up 31 since FY2023.
21	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$29,356,065	1.0%	Rank history: #14 in FY2021, #19 in FY2022, #21 in FY2023 and #23 in FY2025; unchanged since FY2023.
22	Fort Riley Utility Services, Inc. Top agencies Army (Department of the Army)	$27,721,270	0.9%	Rank history: #28 in FY2021, #30 in FY2022, #29 in FY2023 and #41 in FY2025; up 7 since FY2023.
23	Old North Utility Services Inc. 5 awardees, including Terrapin Utility Services, Inc., Old Dominion 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)	$27,507,079	0.9%	Rank history: #7 in FY2021, #8 in FY2022, #8 in FY2023 and not on the FY2025 list; down 15 since FY2023.
24	Duke Energy Corporation 6 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) EPA (Environmental Protection Agency)	$25,370,822	0.8%	Rank history: #30 in FY2021, #11 in FY2022, #11 in FY2023 and #24 in FY2025; down 13 since FY2023.
25	City Light & Power Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$24,214,764	0.8%	Rank history: #20 in FY2021, #17 in FY2022, #32 in FY2023 and not on the FY2025 list; up 7 since FY2023.
26	Sandhills Utility Services, LLC Top agencies Army (Department of the Army)	$23,914,824	0.8%	Rank history: #22 in FY2021, #24 in FY2022, #23 in FY2023 and #39 in FY2025; down 3 since FY2023.
27	OGE Energy Corp 3 awardees, including Oklahoma Gas and Electric Company Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) GSA (General Services Administration)	$23,174,335	0.8%	Rank history: #40 in FY2021, #37 in FY2022, #36 in FY2023 and #96 in FY2025; up 9 since FY2023.
28	Engie Resources LLC 2 awardees Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) DOJ (Department of Justice)	$23,017,037	0.8%	Rank history: #62 in FY2021, #18 in FY2022, #50 in FY2023 and #21 in FY2025; up 22 since FY2023.
29	Constellation Newenergy, Inc. 7 awardees, including Baltimore Gas and Electric Company, Constellation Newenergy - Gas Division, LLC and Commonwealth Edison Co Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) Army (Department of the Army)	$21,467,431	0.7%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; up 134 since FY2023.
30	Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development)	$20,117,927	0.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
31	RIO Grande Electric Cooperative, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$19,910,031	0.7%	Rank history: #18 in FY2021, #31 in FY2022, #38 in FY2023 and #37 in FY2025; up 7 since FY2023.
32	Emerald Coast Utility Services Inc. Top agencies USAF (Department of the Air Force)	$18,952,172	0.6%	Rank history: #32 in FY2021, #35 in FY2022, #34 in FY2023 and #34 in FY2025; up 2 since FY2023.
33	Sho-Me Power Electric Cooperative Top agencies Army (Department of the Army)	$18,357,119	0.6%	Rank history: #29 in FY2021, #36 in FY2022, #40 in FY2023 and #36 in FY2025; up 7 since FY2023.
34	Washington Suburban Sanitary Commission Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) Smithsonian (Smithsonian Institution)	$16,684,047	0.6%	Rank history: #46 in FY2021, #40 in FY2022, #41 in FY2023 and #35 in FY2025; up 7 since FY2023.
35	Golden Valley Electric Association Inc. Top agencies Army (Department of the Army)	$16,640,574	0.6%	Rank history: #41 in FY2021, #45 in FY2022, #48 in FY2023 and #100 in FY2025; up 13 since FY2023.
36	Tokyo Gas Co.,Ltd. Top agencies Navy (Department of the Navy)	$16,137,613	0.5%	Rank history: not on the FY2021 list, #15 in FY2022, #15 in FY2023 and #63 in FY2025; down 21 since FY2023.
37	Firstenergy Corp. 15 awardees, including The Cleveland Electric Illuminating Co, The Potomac Edison Co and West Penn Power Company Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) DOE (Department of Energy)	$15,436,586	0.5%	Rank history: #21 in FY2021, #26 in FY2022, #22 in FY2023 and #44 in FY2025; down 15 since FY2023.
38	Florida Power & Light Company Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice) Army (Department of the Army)	$15,108,992	0.5%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
39	Chugach Electric Association, Inc. Top agencies USAF (Department of the Air Force)	$14,549,582	0.5%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #45 in FY2025; up 3 since FY2023.
40	Direct Energy Business LLC Top agencies GSA (General Services Administration) Treasury (Department of the Treasury) DOJ (Department of Justice)	$14,406,730	0.5%	Rank history: not on the FY2021 list, #99 in FY2022, #71 in FY2023 and #18 in FY2025; up 31 since FY2023.
41	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) VA (Department of Veterans Affairs)	$14,247,909	0.5%	Rank history: #13 in FY2021, #27 in FY2022, #25 in FY2023 and #73 in FY2025; down 16 since FY2023.
42	Augusta-Richmond County Government Top agencies Army (Department of the Army)	$14,211,072	0.5%	Rank history: #39 in FY2021, #44 in FY2022, #64 in FY2023 and #29 in FY2025; up 22 since FY2023.
43	Base Utilities Inc. Top agencies USAF (Department of the Air Force)	$13,888,949	0.5%	Rank history: #33 in FY2021, #49 in FY2022, #47 in FY2023 and #49 in FY2025; up 4 since FY2023.
44	Buyo Gas Co.,Ltd. 2 awardees, including Buyo Ekika Gas Co., Ltd. Top agencies USAF (Department of the Air Force)	$13,538,196	0.5%	Rank history: #67 in FY2021, #39 in FY2022, #39 in FY2023 and #61 in FY2025; down 5 since FY2023.
45	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)	$13,421,292	0.4%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2023 and #28 in FY2025; down 31 since FY2023.
46	Canoochee Electric Membership Corp Top agencies Army (Department of the Army)	$12,846,495	0.4%	Rank history: #68 in FY2021, #78 in FY2022, #57 in FY2023 and #46 in FY2025; up 11 since FY2023.
47	Nolin Rural Electric Cooperative Corporation Top agencies Army (Department of the Army)	$12,699,282	0.4%	Rank history: #80 in FY2021, #46 in FY2022, #43 in FY2023 and #56 in FY2025; down 4 since FY2023.
48	Choctawhatchee Electric Cooperative Inc. Top agencies USAF (Department of the Air Force)	$12,485,571	0.4%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2025; up 371 since FY2023.
49	Entergy Louisiana LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) DOT (Department of Transportation)	$11,435,733	0.4%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2025; new.
50	Monongahela Power Company Top agencies DOJ (Department of Justice) DOE (Department of Energy) Treasury (Department of the Treasury)	$11,285,781	0.4%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2025; new.
51	Dominion Privatization South Carolina LLC Top agencies Army (Department of the Army)	$11,285,042	0.4%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2025; new.
52	SAN Diego Gas & Electric Company 2 awardees, including Southern California Gas Company Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico) Navy (Department of the Navy) DOJ (Department of Justice)	$11,199,532	0.4%	Rank history: #11 in FY2021, #42 in FY2022, #13 in FY2023 and #30 in FY2025; down 39 since FY2023.
53	Magis Energia S.P.A. Top agencies Army (Department of the Army)	$10,518,952	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
54	City of Aberdeen Top agencies Army (Department of the Army)	$10,159,139	0.3%	Rank history: #69 in FY2021, #82 in FY2022, #74 in FY2023 and #70 in FY2025; up 20 since FY2023.
55	Flint Electric Membership Corp Top agencies Army (Department of the Army)	$10,111,199	0.3%	Rank history: #73 in FY2021, #56 in FY2022, #70 in FY2023 and #71 in FY2025; up 15 since FY2023.
56	Oklahoma Gas and Electric Company Top agencies USAF (Department of the Air Force) DOJ (Department of Justice) DOI (Department of the Interior)	$9,550,000	0.3%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2025; new.
57	City Public Services Board Top agencies USAF (Department of the Air Force)	$9,376,093	0.3%	Rank history: #57 in FY2021, #65 in FY2022, #77 in FY2023 and #72 in FY2025; up 20 since FY2023.
58	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)	$9,302,359	0.3%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2023 and #59 in FY2025; up 4 since FY2023.
59	AEP Energy Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$9,266,000	0.3%	Rank history: not on the FY2021 list, #100 in FY2022, not on the FY2023 list and #12 in FY2025; returned.
60	City Light & Power Aberdeen, LLC Top agencies Army (Department of the Army)	$9,121,704	0.3%	Rank history: #27 in FY2021, #22 in FY2022, #20 in FY2023 and not on the FY2025 list; down 40 since FY2023.
61	The Navajo Nation Tribal Government Through Navajo Tribal Utility Authority Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$8,502,868	0.3%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and #58 in FY2025; up 2 since FY2023.
62	Tiger Natural Gas Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$8,501,766	0.3%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2025; new.
63	American Water Enterprises, LLC Top agencies Army (Department of the Army)	$8,481,051	0.3%	Rank history: #82 in FY2021, #66 in FY2022, #44 in FY2023 and #54 in FY2025; down 19 since FY2023.
64	Hawaiian Electric Company, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$8,424,431	0.3%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2025; new.
65	Samchully Co.,Ltd. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$8,406,079	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #52 in FY2023 and #57 in FY2025; down 13 since FY2023.
66	Riverbend Water Resources District Top agencies Army (Department of the Army)	$8,385,861	0.3%	Rank history: #84 in FY2021, #84 in FY2022, #76 in FY2023 and #55 in FY2025; up 10 since FY2023.
67	Central Coast Water Authority Top agencies USAF (Department of the Air Force)	$8,073,743	0.3%	Rank history: #60 in FY2021, #87 in FY2022, #67 in FY2023 and #66 in FY2025; unchanged since FY2023.
68	Omega Pipeline Company, LLC Top agencies Army (Department of the Army)	$7,854,825	0.3%	Rank history: #50 in FY2021, #59 in FY2022, #61 in FY2023 and #60 in FY2025; down 7 since FY2023.
69	Gulf Coast Electric Cooperative Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$7,839,532	0.3%	Rank history: #42 in FY2021, #3 in FY2022, #49 in FY2023 and #50 in FY2025; down 20 since FY2023.
70	Entergy Corporation 2 awardees, including Entergy Louisiana, LLC and Entergy Arkansas, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$7,511,059	0.3%	Rank history: #31 in FY2021, #41 in FY2022, #17 in FY2023 and not on the FY2025 list; down 53 since FY2023.
71	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)	$7,108,033	0.2%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2025; new.
72	Florida Governmental Utility Authority Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$6,939,312	0.2%	Rank history: #35 in FY2021, #62 in FY2022, #75 in FY2023 and not on the FY2025 list; up 3 since FY2023.
73	Brunswick Electric Membership Corporation Top agencies Army (Department of the Army)	$6,791,344	0.2%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2025; up 75 since FY2023.
74	National Grid USA Service Company, Inc. Top agencies VA (Department of Veterans Affairs) DOT (Department of Transportation) DOJ (Department of Justice)	$6,666,746	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
75	Dynegy Energy Services (EAST) LLC 2 awardees, including Illinois Power Marketing Company, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) GSA (General Services Administration)	$6,630,582	0.2%	Rank history: #76 in FY2021, #55 in FY2022, #73 in FY2023 and not on the FY2025 list; down 2 since FY2023.
76	Sage Energy Trading LLC Top agencies VA (Department of Veterans Affairs) DOE (Department of Energy) DOJ (Department of Justice)	$6,364,582	0.2%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and not on the FY2025 list; up 14 since FY2023.
77	Enstar Natural Gas Company, LLC Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$6,002,988	0.2%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
78	Verendrye Electric Cooperative Inc. Top agencies USAF (Department of the Air Force)	$5,819,146	0.2%	Rank history: #97 in FY2021, not on the FY2022 list, #97 in FY2023 and #74 in FY2025; up 19 since FY2023.
79	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)	$5,590,114	0.2%	Rank history: #94 in FY2021, #79 in FY2022, #68 in FY2023 and #48 in FY2025; down 11 since FY2023.
80	Dominion Privatization Virginia, LLC Top agencies Army (Department of the Army)	$4,994,004	0.2%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and not on the FY2025 list; down 21 since FY2023.
81	City Light & Power Jblm LLC Top agencies Army (Department of the Army)	$4,831,934	0.2%	Rank history: #43 in FY2021, #52 in FY2022, #33 in FY2023 and not on the FY2025 list; down 48 since FY2023.
82	Freestate Electric Cooperative, Inc. Top agencies Army (Department of the Army)	$4,819,735	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #95 in FY2025; down 4 since FY2023.
83	Enspire Energy, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$4,783,085	0.2%	Rank history: #85 in FY2021, #88 in FY2022, #93 in FY2023 and #93 in FY2025; up 10 since FY2023.
84	One Gas, Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) Treasury (Department of the Treasury)	$4,675,669	0.2%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2025; new.
85	Tama City Hall Top agencies USAF (Department of the Air Force)	$4,571,166	0.2%	Rank history: not on the FY2021 list, #77 in FY2022, #88 in FY2023 and #77 in FY2025; up 3 since FY2023.
86	Pural Water Specialty Co. , Inc. Top agencies Army (Department of the Army)	$4,536,824	0.2%	Rank history: #59 in FY2021, #97 in FY2022, #66 in FY2023 and #91 in FY2025; down 20 since FY2023.
87	California Water Service Group Through California Water Service Co Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) DCMA (Defense Contract Management Agency)	$4,506,777	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 35 since FY2023.
88	Gexa Energy, LP Top agencies GSA (General Services Administration) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$4,502,165	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	P D R Properties, Inc. Top agencies Army (Department of the Army)	$4,453,885	0.1%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2025; new.
90	Laclede Electric Cooperative Top agencies Army (Department of the Army)	$4,407,151	0.1%	Rank history: #75 in FY2021, #81 in FY2022, #72 in FY2023 and #83 in FY2025; down 18 since FY2023.
91	Hosei Co., Ltd. Top agencies Navy (Department of the Navy)	$4,337,518	0.1%	Rank history: not on the FY2021 list, #80 in FY2022, #86 in FY2023 and not on the FY2025 list; down 5 since FY2023.
92	Plumas-Sierra Rural Electric Co-Operative Top agencies Army (Department of the Army)	$4,251,026	0.1%	Rank history: not on the FY2021 list, #91 in FY2022, #89 in FY2023 and not on the FY2025 list; down 3 since FY2023.
93	County of Hardin Through Hardin County Water District NO. 1 Top agencies Army (Department of the Army)	$4,189,855	0.1%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2025; new.
94	City Light & Power FTC LLC Top agencies Army (Department of the Army)	$4,183,613	0.1%	Rank history: #38 in FY2021, #28 in FY2022, #45 in FY2023 and not on the FY2025 list; down 49 since FY2023.
95	Vandenberg Solar I, LLC Top agencies USAF (Department of the Air Force)	$4,007,614	0.1%	Rank history: #89 in FY2021, #96 in FY2022, #100 in FY2023 and #97 in FY2025; up 5 since FY2023.
96	Pinnacle West Capital Corporation 2 awardees, including Arizona Public Service Company and Liberty Utilities (Litchfield Park Water & Sewer) Corp. Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior) IBWC (International Boundary and Water Commission U.S.-Mexico)	$4,005,311	0.1%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023 and #92 in FY2025; down 66 since FY2023.
97	South Granville Water & Sewer Auth Top agencies DOJ (Department of Justice)	$3,919,507	0.1%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2025; up 6 since FY2023.
98	Centerpoint Energy Resources Corp. Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) DOJ (Department of Justice)	$3,917,872	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
99	Liberty Utilities (Peach State Natural Gas) Corp. Top agencies Army (Department of the Army)	$3,916,179	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
100	Antelope Valley East Kern Water Agency Top agencies USAF (Department of the Air Force)	$3,772,117	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 6 since FY2023.

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100 of 912 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC S1

Code	Net obligations	Largest contractor
S112 Electric Services	$1,396,827,419	Doyon Utilities LLC
S114 Water Services	$652,506,480	American Water Works Company Inc.
S119 Other Utilities	$364,591,954	Potomac Electric Power Co
S111 Gas Services	$223,666,272	Centrica PLC

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 $2.99 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 FY2024?

1. American Water Works Company Inc. ($247M), 2. Foreign Utility Consolidated Reporting ($199M), 3. L3Harris Technologies, Inc. ($166M), 4. Doyon Utilities LLC ($120M), 5. Potomac Electric Power Co ($116M), 6. Dominion Resources Inc. ($102M), 7. Fort Bliss Water Services Company ($100M), 8. Amber Infrastructure LLC ($85.6M), 9. WGL Energy Services Inc. ($82.1M), 10. Pacific Gas and Electric Company ($59.8M).

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