On the Record · Williams Companies
Williams Companies subsidiaries, as it lists them
The subsidiaries Williams Companies lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| 4C's Land Holdings, LLC | Delaware |
| Arcadia Gas Storage, LLC | Texas |
| Appalachia Midstream Services, L.L.C. | Oklahoma |
| Aurora Hydrogen Inc. | Alberta |
| Bargath LLC | Delaware |
| Baton Rouge Fractionators LLC | Delaware |
| Baton Rouge Pipeline LLC | Delaware |
| Black Marlin Pipeline LLC | Texas |
| Blue Racer Finance Corp. | Delaware |
| Blue Racer Midstream, LLC | Delaware |
| Blue Racer Midstream Holdings, LLC | Delaware |
| Blue Racer NGL Pipelines, LLC | Delaware |
| Blue Racer Ohio Compression, LLC | Delaware |
| Bluestem Gas Services, L.L.C. | Oklahoma |
| Bluestem Pipeline LLC | Delaware |
| Branch Midstream Company, LLC | Texas |
| Brazos Permian II, LLC | Delaware |
| Cadeville Gas Storage LLC | Delaware |
| Carbon County UCG, Inc. | Delaware |
| Carbonate Trend Pipeline LLC | Delaware |
| Cardinal Gas Services, L.L.C. | Delaware |
| Cardinal Operating Company, LLC | Delaware |
| Cardinal Pipeline Company, LLC | North Carolina |
| Cogentrix Co-Investment Fund, LP | Delaware |
| Constitution Pipeline Company, LLC | Delaware |
| Context Labs B.V. | Netherlands |
| Crowheart Energy, LLC | Delaware |
| DMP NEW YORK, INC. | New York |
| Dauphin Island Gathering Partners | Texas |
| Discovery Gas Transmission LLC | Delaware |
| Discovery Producer Services LLC | Delaware |
| Driftwood Pipeline LLC | Delaware |
| EIC Rose Rock Ventures I, LP | Delaware |
| EIC Deep Carbonization Frontier Fund I LP | Delaware |
| EIP Flagship Fund III LP | Delaware |
| EIP Frontier Fund II LP | Delaware |
| EIP Frontier I AIV A LP | Delaware |
| Edge Solar LLC | Delaware |
| Emerging Energy Ventures, LLC | Delaware |
| Encino Environmental Holdings LLC | Delaware |
| Energy Impact Fund II (FT-D) LP | Delaware |
| Energy Impact Fund II LP | Delaware |
| Fossett Columbine, LLC | Delaware |
| Gemini Arklatex, LLC | Delaware |
| Gemini Arklatex Services, LLC | Delaware |
| Gemini Carthage Pipeline, LLC | Delaware |
| Gillis New Energy Solutions LLC | Delaware |
| Gulfstar One LLC | Delaware |
| Gulfstream Management & Operating Services, L.L.C. | Delaware |
| Gulfstream Natural Gas System, L.L.C. | Delaware |
| Hill-Lake Gas Storage, LLC | Texas |
| ION Clean Energy, Inc. | Delaware |
| Ingu Solutions Inc. | New Brunswick |
| Inland Ports, Inc. | Tennessee |
| Katy Connector Pipeline, LLC | Delaware |
| Kiowa Lateral LLC | Delaware |
| Laurel Mountain Midstream Operating LLC | Delaware |
| Laurel Mountain Midstream, LLC | Delaware |
| LongPath Technologies, Inc. | Delaware |
| Louisiana Energy Gateway LLC | Delaware |
| Louisiana LNG LLC | Delaware |
| Louisiana Midstream Gas Services, L.L.C. | Oklahoma |
| Louisiana New Energy Solutions LLC | Delaware |
| Magnolia Midstream Gas Services, L.L.C. | Oklahoma |
| Magnolia New Energy Solutions LLC | Delaware |
| Marsh Resources, LLC | Delaware |
| Mid-Continent Fractionation and Storage, LLC | Delaware |
| Mockingbird Midstream Gas Services, L.L.C. | Oklahoma |
| Monarch Pipeline LLC | Delaware |
| Monroe Gas Storage Company, LLC | Delaware |
| MountainWest Energy Holding Company, LLC | Utah |
| MountainWest Energy Services, LLC | Utah |
| MountainWest Field Services, LLC | Utah |
| MountainWest Overthrust Pipeline, LLC | Utah |
| MountainWest Pipeline Services, LLC | Utah |
| MountainWest Pipeline, LLC | Utah |
| MountainWest Pipelines Holding LLC | Delaware |
| MountainWest Southern Trails Pipeline Company | Utah |
| MountainWest White River Hub, LLC | Utah |
| NT Minerals, LLC | Texas |
| NWC Development, LLC | Colorado |
| New Energy Ventures Holdco, LLC | Delaware |
| NorTex Development Company, LLC | Delaware |
| NorTex Midstream Holdings, LLC | Delaware |
| NorTex Midstream Partners, LLC | Delaware |
| NorTex Trading and Marketing, LLC | Texas |
| Northwest Pipeline LLC | Delaware |
| Ohio Valley Midstream LLC | Delaware |
| Oklahoma Midstream Gas Services, L.L.C. | Oklahoma |
| Orbital Sidekick, Inc. | Delaware |
| Overland Pass Pipeline Company LLC | Delaware |
| Parachute Pipeline LLC | Delaware |
| Permian Connector, LLC | Delaware |
| Perryville Gas Storage LLC | Delaware |
| Pine Needle LNG Company, LLC | North Carolina |
| Pine Needle Operating Company, LLC | Delaware |
| Pine Prairie Energy Center, LLC | Delaware |
| Ponder Midstream Gas Services, L.L.C. | Delaware |
| Power Eight Project LLC | Delaware |
| REP G&P Holdings, LLC | Delaware |
| REP Processing LLC | Delaware |
| Rocky Mountain Midstream Holdings LLC | Delaware |
| Rocky Mountain Midstream JV Holdings LLC | Delaware |
| Rocky Mountain Midstream LLC | Texas |
| Rocky Mountain Midstream Marketing LLC | Texas |
| Rocky Mountain Midstream Pipeline LLC | Texas |
| SG Resources Mississippi, L.L.C. | Delaware |
| Saber Midstream Holdings, LLC | Delaware |
| Saber Midstream, LLC | Delaware |
| Sequent Energy Canada LLC | Delaware |
| Sequent Energy Management LLC | Delaware |
| Sequent LNG LLC | Delaware |
| Sequent LNG Marketing LLC | Delaware |
| Sequent Louisiana Gas Supply LLC | Delaware |
| Socagee Midstream Gas Services LLC | Delaware |
| South Mansfield E&P, LLC | Delaware |
| TWC Holdings C.V. | Netherlands |
| Targa Train 7 LLC | Delaware |
| Texas Midstream Gas Services, L.L.C. | Oklahoma |
| The Williams Companies Foundation, Inc. | Oklahoma |
| The Williams Companies International Holdings B.V. | Netherlands |
| TransCardinal Company, LLC | Delaware |
| TransCarolina LNG Company, LLC | Delaware |
| Transco Exploration Company | Delaware |
| Transcontinental Gas Pipe Line Company, LLC | Delaware |
| UEOM NGL Pipelines LLC | Delaware |
| Utica East Ohio Midstream LLC | Delaware |
| Utica Gas Services, L.L.C. | Oklahoma |
| WFS - Liquids LLC | Delaware |
| WFS Dauphin Island, LLC | Delaware |
| WFS Gathering Company, L.L.C. | Delaware |
| WFS Mobile Bay Processing, LLC | Delaware |
| WFS Natural Gas Storage, LLC | Delaware |
| Wamsutter LLC | Delaware |
| West Texas Midstream Gas Services, LLC | Delaware |
| White River Hub, LLC | Delaware |
| WilPro Energy Services (El Furrial) Limited | Cayman Islands |
| WilPro Energy Services (Pigap II) Limited | Cayman Islands |
| Will-Power ID, LLC | Delaware |
| Will-Power OH, LLC | Delaware |
| Will-Power OK, LLC | Delaware |
| Will-Power PENN, LLC | Delaware |
| Will-Power Pipeline OH, LLC | Delaware |
| Will-Power Pipeline UT, LLC | Delaware |
| Will-Power UT, LLC | Delaware |
| Will-Power VA, LLC | Delaware |
| Will-Power WY, LLC | Delaware |
| Williams Acquisition Holding Company LLC | New Jersey |
| Williams Alaska Petroleum, Inc. | Alaska |
| Williams Blu Operating LLC | Delaware |
The list is long; these are the first 150 as the company lists them. From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Williams Companies’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-24. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.