Top 100 Contractors in NAICS 22121: Natural Gas Distribution, Aug 2025–Jul 2026

Name: Top 100 Contractors in NAICS 22121: Natural Gas Distribution, Aug 2025–Jul 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Contractors in NAICS 22121: Natural Gas Distribution, FY2025.

The top 10 won 57% of NAICS 22121 contract dollars from August 2025 through July 2026

Contract obligations: $342,950,465 Net of deobligations, by contracts coded NAICS 22121 or a code under it
Contractors: 141 Parent companies with an obligation
Largest contractor: The Southern Company $58.6 million, 15.7% of obligations
Data as of: Nov 5, 2026

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

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	The Southern Company 5 awardees, including Atlanta Gas Light Company, Southern Company Gas and Virginia Natural Gas, Inc. Top agencies DHS (Department of Homeland Security) GSA (General Services Administration) NASA (National Aeronautics and Space Administration)	$58,633,412	15.7%	Rank history: #13 in FY2021, #17 in FY2022, #11 in FY2023, #11 in FY2024 and #17 in FY2025; up 18 since Aug 2024–Jul 2025.
2	Tokyo Gas Co.,Ltd. Top agencies Navy (Department of the Navy)	$27,164,141	7.3%	Rank history: not on the FY2021 list, #1 in FY2022, #2 in FY2023, #3 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
3	United Energy Corporation Through United Energy Trading, LLC Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration)	$21,955,942	5.9%	Rank history: #31 in FY2021, #35 in FY2022, #37 in FY2023, #25 in FY2024 and #5 in FY2025; up 12 since Aug 2024–Jul 2025.
4	WGL Holdings Inc. 3 awardees, including Washington Gas Light Company, Enstar Natural Gas Company, LLC and WGL Energy Services, Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) DOJ (Department of Justice)	$20,507,889	5.5%	Rank history: #1 in FY2021, #2 in FY2022, #1 in FY2023, #1 in FY2024 and #2 in FY2025; down 1 since Aug 2024–Jul 2025.
5	NRG Energy, Inc. 2 awardees, including NRG Business Marketing LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) GSA (General Services Administration)	$16,594,248	4.4%	Rank history: not on the FY2021 list, #10 in FY2022, not on the FY2023–FY2024 lists and #3 in FY2025; up 72 since Aug 2024–Jul 2025.
6	Buyo Gas Co.,Ltd. Top agencies USAF (Department of the Air Force)	$15,490,691	4.1%	Rank history: #10 in FY2021, #5 in FY2022, #3 in FY2023, #5 in FY2024 and #6 in FY2025; down 1 since Aug 2024–Jul 2025.
7	Schuyler Line Navigation Company LLC Top agencies Navy (Department of the Navy)	$15,243,638	4.1%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #4 in FY2025; down 6 since Aug 2024–Jul 2025.
8	Cobb Electric Membership Corporation 2 awardees, including Enspire Energy, LLC and Gas South, LLC Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$13,678,385	3.7%	Rank history: #16 in FY2021, #20 in FY2022, #7 in FY2023, #8 in FY2024 and #9 in FY2025; up 3 since Aug 2024–Jul 2025.
9	Eneos Corporation Top agencies USAF (Department of the Air Force)	$12,227,922	3.3%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #10 in FY2025; down 1 since Aug 2024–Jul 2025.
10	Enstar Natural Gas Company, LLC Top agencies USAF (Department of the Air Force)	$11,643,624	3.1%	Rank history: not on the FY2021–FY2023 lists, #15 in FY2024 and #8 in FY2025; down 3 since Aug 2024–Jul 2025.
11	Omega Pipeline Company, LLC Top agencies Army (Department of the Army)	$10,942,406	2.9%	Rank history: #4 in FY2021, #7 in FY2022, #8 in FY2023, #13 in FY2024 and #13 in FY2025; up 1 since Aug 2024–Jul 2025.
12	Samchully Co.,Ltd. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$10,679,585	2.9%	Rank history: #18 in FY2021, #8 in FY2022, #6 in FY2023, #10 in FY2024 and #11 in FY2025; down 3 since Aug 2024–Jul 2025.
13	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) HHS (Department of Health and Human Services)	$9,324,402	2.5%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and #14 in FY2025; up 18 since Aug 2024–Jul 2025.
14	Foreign Utility Consolidated Reporting Top agencies Army (Department of the Army)	$9,198,305	2.5%	Rank history: #7 in FY2021, #6 in FY2022, #4 in FY2023, #6 in FY2024 and #7 in FY2025; down 8 since Aug 2024–Jul 2025.
15	Southwest Gas Corporation Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$8,134,943	2.2%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #26 in FY2025; up 20 since Aug 2024–Jul 2025.
16	One Gas, Inc. 4 awardees Top agencies Army (Department of the Army) DOJ (Department of Justice) NARA (National Archives and Records Administration)	$7,870,644	2.1%	Rank history: #15 in FY2021, #15 in FY2022, #14 in FY2023, #12 in FY2024 and #12 in FY2025; down 2 since Aug 2024–Jul 2025.
17	Sage Energy Trading LLC Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice) DOE (Department of Energy)	$7,477,984	2.0%	Rank history: #8 in FY2021, #13 in FY2022, #13 in FY2023, #14 in FY2024 and #22 in FY2025; up 6 since Aug 2024–Jul 2025.
18	Duke Energy Corporation 2 awardees, including Piedmont Natural Gas Company, Inc. and Duke Energy Ohio, Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$7,282,444	1.9%	Rank history: #56 in FY2021, #29 in FY2022, #19 in FY2023, #16 in FY2024 and #19 in FY2025; up 3 since Aug 2024–Jul 2025.
19	The Navajo Nation Tribal Government Through Navajo Tribal Utility Authority Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$6,169,286	1.7%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2023, #9 in FY2024 and #15 in FY2025; down 9 since Aug 2024–Jul 2025.
20	Liberty Utilities (Peach State Natural Gas) Corp. Top agencies Army (Department of the Army)	$3,496,002	0.9%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and #20 in FY2025; down 2 since Aug 2024–Jul 2025.
21	National Grid USA Service Company, Inc. Top agencies DOJ (Department of Justice) DOT (Department of Transportation) Treasury (Department of the Treasury)	$3,249,665	0.9%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #25 in FY2025; up 5 since Aug 2024–Jul 2025.
22	Centerpoint Energy Resources Corp. 5 awardees, including Vectren Energy Delivery of Ohio, LLC, Nextera Energy Services Gas, LLC and Mobile Energy Solutions, Inc. Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) Army (Department of the Army)	$2,544,291	0.7%	Rank history: not on the FY2021–FY2023 lists, #81 in FY2024 and #46 in FY2025; up 23 since Aug 2024–Jul 2025.
23	Excelerate Gas Marketing, Limited Partnership Top agencies Navy (Department of the Navy)	$2,466,200	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	Dominion Energy, Inc. 3 awardees, including Dominion Energy South Carolina, Inc., Public Service Company of North Carolina, Incorporated and Questar Gas Company Top agencies Army (Department of the Army) DOJ (Department of Justice) USAF (Department of the Air Force)	$2,197,665	0.6%	Rank history: #24 in FY2021, #27 in FY2022, #28 in FY2023, #39 in FY2024 and #23 in FY2025; up 35 since Aug 2024–Jul 2025.
25	Nisource Inc. 4 awardees, including Columbia Gas of Pennsylvania Inc., Columbia Gas of Virginia, Inc. and Columbia Gas of Ohio Inc. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) Smithsonian (Smithsonian Institution)	$2,174,097	0.6%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #27 in FY2025; up 3 since Aug 2024–Jul 2025.
26	Colonial Energy Inc Top agencies VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration) GSA (General Services Administration)	$2,055,945	0.5%	Rank history: not on the FY2021–FY2023 lists, #31 in FY2024 and #28 in FY2025; up 4 since Aug 2024–Jul 2025.
27	City of Philadelphia Top agencies DOI (Department of the Interior) Treasury (Department of the Treasury) GSA (General Services Administration)	$1,942,610	0.5%	Rank history: #11 in FY2021, #4 in FY2022, #40 in FY2023, #48 in FY2024 and #37 in FY2025; up 64 since Aug 2024–Jul 2025.
28	Phoenix Contracting LLC Top agencies Navy (Department of the Navy)	$1,920,180	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
29	Constellation Newenergy - Gas Division, LLC Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) RRB (Railroad Retirement Board)	$1,661,866	0.4%	Rank history: #35 in FY2021, #3 in FY2022, #53 in FY2023, #26 in FY2024 and #16 in FY2025; down 16 since Aug 2024–Jul 2025.
30	UGI Corporation 3 awardees, including UGI Utilities Inc., Amerigas Propane, L.P. and UGI Energy Services, LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) Navy (Department of the Navy)	$1,593,099	0.4%	Rank history: not on the FY2021 list, #69 in FY2022, #20 in FY2023, #20 in FY2024 and #21 in FY2025; down 10 since Aug 2024–Jul 2025.
31	Xpress Natural Gas LLC Top agencies VA (Department of Veterans Affairs)	$1,392,300	0.4%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #30 in FY2025; up 7 since Aug 2024–Jul 2025.
32	City of Clarksville Top agencies Army (Department of the Army)	$1,050,273	0.3%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2023, #27 in FY2024 and #38 in FY2025; down 5 since Aug 2024–Jul 2025.
33	Yeongnam Energy Service Co., Ltd. Top agencies Army (Department of the Army)	$900,000	0.2%	Rank history: #36 in FY2021, not on the FY2022–FY2024 lists and #29 in FY2025; down 1 since Aug 2024–Jul 2025.
34	West Coast Gas Company, Inc. Top agencies DOJ (Department of Justice)	$882,590	0.2%	Rank history: #33 in FY2021, #38 in FY2022, #31 in FY2023, #53 in FY2024 and #31 in FY2025; unchanged since Aug 2024–Jul 2025.
35	Nextera Energy Inc. Through Pivotal Utility Holdings Inc. Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice)	$861,907	0.2%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; up 20 since Aug 2024–Jul 2025.
36	MDU Resources Group, Inc. 3 awardees, including Cascade Natural Gas Corp and Montana Dakota Utilities Co Top agencies EPA (Environmental Protection Agency) HHS (Department of Health and Human Services) DOI (Department of the Interior)	$826,393	0.2%	Rank history: #73 in FY2021, #64 in FY2022, #78 in FY2023, #62 in FY2024 and #45 in FY2025; up 18 since Aug 2024–Jul 2025.
37	PS Energy Group, Inc. Top agencies DOJ (Department of Justice)	$805,825	0.2%	Rank history: #26 in FY2021, #25 in FY2022, #52 in FY2023, #52 in FY2024 and #39 in FY2025; up 4 since Aug 2024–Jul 2025.
38	Daesung Energy Co.,Ltd. Top agencies Army (Department of the Army)	$760,000	0.2%	Rank history: #60 in FY2021, not on the FY2022–FY2024 lists and #33 in FY2025; down 1 since Aug 2024–Jul 2025.
39	Toro Partners II, LP Top agencies NASA (National Aeronautics and Space Administration)	$754,560	0.2%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and #34 in FY2025; unchanged since Aug 2024–Jul 2025.
40	Penn Oak Services LLC Top agencies NASA (National Aeronautics and Space Administration)	$727,942	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
41	Carbonbetter, LLC Top agencies VA (Department of Veterans Affairs)	$722,646	0.2%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; up 9 since Aug 2024–Jul 2025.
42	San Luis Butane Distributors Top agencies USAF (Department of the Air Force)	$675,390	0.2%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; up 5 since Aug 2024–Jul 2025.
43	Exelon Corporation Through Constellation Newenergy - Gas Division, LLC Top agencies DOJ (Department of Justice)	$673,132	0.2%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, #44 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
44	Northwest Natural Holding Company Through Northwest Natural Gas Co Top agencies DOJ (Department of Justice) DOI (Department of the Interior) HHS (Department of Health and Human Services)	$648,291	0.2%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023, #67 in FY2024 and #44 in FY2025; up 4 since Aug 2024–Jul 2025.
45	KO-One Energy Service Co. Ltd Top agencies Army (Department of the Army)	$647,700	0.2%	Rank history: #43 in FY2021, #33 in FY2022, #27 in FY2023, #32 in FY2024 and #43 in FY2025; up 27 since Aug 2024–Jul 2025.
46	Tiger Natural Gas Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$630,922	0.2%	Rank history: not on the FY2021–FY2023 lists, #49 in FY2024 and #66 in FY2025; up 10 since Aug 2024–Jul 2025.
47	Southern California Gas Company Top agencies DOJ (Department of Justice) DOI (Department of the Interior) NARA (National Archives and Records Administration)	$618,279	0.2%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #36 in FY2025; down 11 since Aug 2024–Jul 2025.
48	Locem Construction Co., Ltd. Top agencies USAF (Department of the Air Force)	$600,305	0.2%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; new, not ranked in Aug 2024–Jul 2025.
49	Hanjin Heavy Industries & Construction Holdings Co. Ltd. Through Daeryun E&S Co., Ltd. Top agencies Army (Department of the Army)	$594,165	0.2%	Rank history: #21 in FY2021, #31 in FY2022, #32 in FY2023, #38 in FY2024 and #24 in FY2025; down 16 since Aug 2024–Jul 2025.
50	BSE Performance, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$528,523	0.1%	Rank history: #40 in FY2021, #45 in FY2022, #38 in FY2023, #34 in FY2024 and #76 in FY2025; up 25 since Aug 2024–Jul 2025.
51	Natural Energy Utility Corp Top agencies DOJ (Department of Justice)	$476,123	0.1%	Rank history: #58 in FY2021, #48 in FY2022, #56 in FY2023, not on the FY2024 list and #49 in FY2025; up 1 since Aug 2024–Jul 2025.
52	The Gas Company, LLC Top agencies DOJ (Department of Justice)	$473,137	0.1%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #62 in FY2025; up 24 since Aug 2024–Jul 2025.
53	Kentucky Frontier Gas, Llc. Top agencies DOJ (Department of Justice)	$454,912	0.1%	Rank history: #64 in FY2021, #61 in FY2022, #69 in FY2023, #68 in FY2024 and #50 in FY2025; up 9 since Aug 2024–Jul 2025.
54	Summit Utilities Oklahoma, Inc. Top agencies DOJ (Department of Justice)	$447,053	0.1%	Rank history: not on the FY2021–FY2023 lists, #60 in FY2024 and #65 in FY2025; up 16 since Aug 2024–Jul 2025.
55	Empire Natural Gas Corporation Top agencies VA (Department of Veterans Affairs)	$434,095	0.1%	Rank history: #78 in FY2021, #78 in FY2022, #62 in FY2023, #51 in FY2024 and #42 in FY2025; down 9 since Aug 2024–Jul 2025.
56	Welch Gas Cooperative Association Top agencies DOJ (Department of Justice)	$415,769	0.1%	Rank history: #67 in FY2021, #72 in FY2022, #74 in FY2023, #61 in FY2024 and #57 in FY2025; down 3 since Aug 2024–Jul 2025.
57	Essential Utilities, Inc. Through Peoples Natural Gas Company LLC Top agencies DOE (Department of Energy) DOJ (Department of Justice)	$407,000	0.1%	Rank history: #79 in FY2021, #71 in FY2022, #57 in FY2023, #72 in FY2024 and #73 in FY2025; up 38 since Aug 2024–Jul 2025.
58	Mountaineer Gas Co Top agencies DOJ (Department of Justice) DOL (Department of Labor)	$406,389	0.1%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists, #69 in FY2024 and #54 in FY2025; down 1 since Aug 2024–Jul 2025.
59	Delta Natural Gas Co Inc. Top agencies DOJ (Department of Justice)	$395,893	0.1%	Rank history: #49 in FY2021, #82 in FY2022, not on the FY2023 list, #100 in FY2024 and #71 in FY2025; up 20 since Aug 2024–Jul 2025.
60	Mountain V Oil & Gas, Inc. Top agencies DOJ (Department of Justice)	$369,075	0.1%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; up 1 since Aug 2024–Jul 2025.
61	Novec Energy Solutions Inc. Top agencies GSA (General Services Administration) AFRH (Armed Forces Retirement Home)	$368,807	0.1%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; new, not ranked in Aug 2024–Jul 2025.
62	Delta Utilities Services, LLC Top agencies AFRH (Armed Forces Retirement Home) NASA (National Aeronautics and Space Administration)	$352,624	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
63	Air BP Sales Romania S.R.L. Through IGI Resources Inc. Top agencies VA (Department of Veterans Affairs)	$340,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; up 6 since Aug 2024–Jul 2025.
64	UNS Energy Corporation Through Central Hudson Gas & Electric Corporation Top agencies NARA (National Archives and Records Administration)	$337,517	0.1%	Rank history: not on the FY2021–FY2023 lists, #74 in FY2024 and #60 in FY2025; unchanged since Aug 2024–Jul 2025.
65	Lunar Holdings LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force)	$337,350	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
66	Pickens County Natural Gas District Top agencies DOJ (Department of Justice)	$320,336	0.1%	Rank history: not on the FY2021 list, #37 in FY2022, #79 in FY2023, #64 in FY2024 and #51 in FY2025; unchanged since Aug 2024–Jul 2025.
67	WEC Energy Group Inc. 2 awardees, including Wisconsin Gas LLC and Minnesota Energy Resources Corporation Top agencies DOJ (Department of Justice)	$308,827	0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 14 since Aug 2024–Jul 2025.
68	Centerpoint Energy, Inc. Through Vectren LLC Top agencies Commerce (Department of Commerce)	$306,812	0.1%	Rank history: #46 in FY2021, #24 in FY2022, #43 in FY2023, #41 in FY2024 and #32 in FY2025; up 12 since Aug 2024–Jul 2025.
69	MEC Services LLC Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$306,253	0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #92 in FY2025; up 27 since Aug 2024–Jul 2025.
70	Merrimac Petroleum, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DOI (Department of the Interior)	$305,261	0.1%	Rank history: #54 in FY2021, #66 in FY2022, #63 in FY2023, #37 in FY2024 and #53 in FY2025; down 21 since Aug 2024–Jul 2025.
71	Southern Company Gas Top agencies GSA (General Services Administration)	$291,852	0.1%	Rank history: not on the FY2021 list, #75 in FY2022, #83 in FY2023, #66 in FY2024 and #63 in FY2025; down 8 since Aug 2024–Jul 2025.
72	Xcel Energy Inc. Through Public Service Company of Colorado Top agencies Treasury (Department of the Treasury)	$276,022	0.1%	Rank history: not on the FY2021–FY2023 lists, #77 in FY2024 and #72 in FY2025; new, not ranked in Aug 2024–Jul 2025.
73	United Paradyne Corporation Top agencies Navy (Department of the Navy)	$225,395	0.1%	Rank history: #41 in FY2021, #43 in FY2022, #23 in FY2023, #56 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
74	Nations Gas Technologies Inc Top agencies HHS (Department of Health and Human Services)	$201,898	0.1%	Rank history: not on the FY2021–FY2023 lists, #70 in FY2024 and #81 in FY2025; up 18 since Aug 2024–Jul 2025.
75	South Jersey Gas Co Top agencies DOJ (Department of Justice)	$192,000	0.1%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #68 in FY2025; down 1 since Aug 2024–Jul 2025.
76	Northwestern Energy Group, Inc. Through Northwestern Corp Top agencies HHS (Department of Health and Human Services)	$190,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
77	The Peoples Gas Lght & Coke Co Top agencies SSA (Social Security Administration)	$188,830	0.1%	Rank history: not on the FY2021–FY2023 lists, #78 in FY2024 and not on the FY2025 list; up 20 since Aug 2024–Jul 2025.
78	Seoul City Gas Co.,Ltd. Top agencies Army (Department of the Army)	$172,445	<0.1%	Rank history: #53 in FY2021, #59 in FY2022, not on the FY2023 list, #79 in FY2024 and #56 in FY2025; down 13 since Aug 2024–Jul 2025.
79	Kunsan City Gas Top agencies USAF (Department of the Air Force)	$167,061	<0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; up 37 since Aug 2024–Jul 2025.
80	City of Las Cruces Top agencies NASA (National Aeronautics and Space Administration)	$153,359	<0.1%	Rank history: #75 in FY2021, #81 in FY2022, #86 in FY2023, #65 in FY2024 and #89 in FY2025; down 2 since Aug 2024–Jul 2025.
81	Nextera Energy Services Gas, LLC Top agencies DOJ (Department of Justice)	$149,656	<0.1%	Rank history: not on the FY2021–FY2025 lists; down 38 since Aug 2024–Jul 2025.
82	Commercial Energy of Montana Inc. Top agencies HHS (Department of Health and Human Services)	$149,520	<0.1%	Rank history: #86 in FY2021, not on the FY2022–FY2023 lists, #90 in FY2024 and not on the FY2025 list; up 31 since Aug 2024–Jul 2025.
83	Brooklyn Navy Yard Development Corp Top agencies DOJ (Department of Justice)	$147,432	<0.1%	Rank history: #76 in FY2021, not on the FY2022 list, #92 in FY2023, #91 in FY2024 and #85 in FY2025; up 22 since Aug 2024–Jul 2025.
84	Bhpe LLC Top agencies Army (Department of the Army)	$143,560	<0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
85	National Fuel Gas Co Through National Fuel Gas Distribution Corp Top agencies DOJ (Department of Justice)	$130,609	<0.1%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and #80 in FY2025; up 5 since Aug 2024–Jul 2025.
86	Keyspan Gas East Corporation Top agencies Treasury (Department of the Treasury)	$118,305	<0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; down 2 since Aug 2024–Jul 2025.
87	Atmos Energy Corporation Top agencies DOJ (Department of Justice)	$116,844	<0.1%	Rank history: not on the FY2021 list, #36 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
88	Black Hills Utility Holdings Inc. Through Black Hills Wyoming Gas, LLC Top agencies DOI (Department of the Interior)	$114,263	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	Chopro, K.K. Top agencies Navy (Department of the Navy)	$113,665	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; down 1 since Aug 2024–Jul 2025.
90	Suburban Propane Partners, L.P Top agencies Army (Department of the Army) HHS (Department of Health and Human Services)	$111,684	<0.1%	Rank history: #89 in FY2021, #96 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; up 57 since Aug 2024–Jul 2025.
91	Berkshire Hathaway Inc. Through Mid American Energy Company Top agencies DOI (Department of the Interior)	$110,000	<0.1%	Rank history: not on the FY2021 list, #85 in FY2022, not on the FY2023–FY2024 lists and #99 in FY2025; up 15 since Aug 2024–Jul 2025.
92	Bobs Gas Service LLC Top agencies HHS (Department of Health and Human Services)	$108,495	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
93	City of Independence Top agencies NARA (National Archives and Records Administration)	$106,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #86 in FY2025; down 6 since Aug 2024–Jul 2025.
94	Petro Plumbing and Heating, Inc. Top agencies Army (Department of the Army)	$97,299	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 18 since Aug 2024–Jul 2025.
95	Amerigas Propane L.P. Through UGI Penn Natural Gas, Inc. Top agencies Navy (Department of the Navy)	$89,136	<0.1%	Rank history: #20 in FY2021, #11 in FY2022, #15 in FY2023, #23 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
96	Buyo Ekika Gas Co., Ltd. Top agencies USAF (Department of the Air Force)	$80,158	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 15 since Aug 2024–Jul 2025.
97	C & G LLC Top agencies Commerce (Department of Commerce)	$79,300	<0.1%	Rank history: not on the FY2021 list, #91 in FY2022, not on the FY2023–FY2024 lists and #93 in FY2025; up 4 since Aug 2024–Jul 2025.
98	Pike Natural Gas Co Top agencies DOE (Department of Energy)	$75,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; down 15 since Aug 2024–Jul 2025.
99	The Southeast Alabama Gas District Top agencies Army (Department of the Army)	$73,972	<0.1%	Rank history: #92 in FY2021, #94 in FY2022, #100 in FY2023, #86 in FY2024 and #88 in FY2025; down 17 since Aug 2024–Jul 2025.
100	Avista Corporation Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$73,698	<0.1%	Rank history: not on the FY2021–FY2023 lists, #88 in FY2024 and #95 in FY2025; down 15 since Aug 2024–Jul 2025.

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100 of 141 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 22121

Code	Net obligations	Largest contractor
221210 Natural Gas Distribution	$342,950,465	The Southern Company

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 $374 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Aug 2024–Jul 2025. "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.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 22121 contractors in Aug 2025–Jul 2026?

1. The Southern Company ($58.6M), 2. Tokyo Gas Co.,Ltd. ($27.2M), 3. United Energy Corporation ($22M), 4. WGL Holdings Inc. ($20.5M), 5. NRG Energy, Inc. ($16.6M), 6. Buyo Gas Co.,Ltd. ($15.5M), 7. Schuyler Line Navigation Company LLC ($15.2M), 8. Cobb Electric Membership Corporation ($13.7M), 9. Eneos Corporation ($12.2M), 10. Enstar Natural Gas Company, LLC ($11.6M).

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