Who owns Transwestern Pipeline?
Transwestern Pipeline is owned by Energy Transfer (the United States, NYSE: ET).[1]
Evidence: Energy Transfer LP Annual Report on Form 10-K filed 2026-02-19, SEC EDGAR, 19 February 2026. Verified from filings; last checked .
Key facts
- Current owner
- Energy Transfer LP verified
- Owner HQ
- 🇺🇸 United States
- Origin
- 🇺🇸 United States
- Category
- Energy › Oil & gas › Pipelines & midstream
- Parent ticker
- NYSE: ET
- Last verified
- · 1 sources
About Transwestern Pipeline
Transwestern Pipeline Company, LLC is listed in Energy Transfer's 2025 10-K as a wholly owned subsidiary and operates an interstate natural gas pipeline.
What Energy Transfer's annual report says about Transwestern Pipeline
Sentences about Transwestern Pipeline from Energy Transfer's latest annual filing[1], copied word for word.
An expansion of the Transwestern Pipeline, including upsizing pipeline diameter to increase capacity, is expected to be in-service by the end of 2029.
How often Energy Transfer names Transwestern Pipeline in its annual report
A plain count of the times the name appears in the text of each annual report, not counting the start of a sentence. A brand that an owner writes about more is usually one it treats as central.
Ownership timeline of Transwestern Pipeline
- Current owner Energy Transfer [1] verified
Where Transwestern Pipeline sits in Energy Transfer
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Energy Transfer ownership tree →
See the full Energy Transfer brand portfolio (5) →
Other brands owned by Energy Transfer
Energy Transfer controls 5 brands on Brandtree, 5 of them in energy.
Also in energy
Other brands in pipelines & midstream, and who owns them
Energy Transfer has more brands in pipelines & midstream on Brandtree than any other owner: 4 of 35.
| Brand | Owner | Owner based in |
|---|---|---|
| Dixie Pipeline | Enterprise Products | 🇺🇸 United States |
| Basin Pipeline | Plains All American | 🇺🇸 United States |
| MountainWest | Williams | 🇺🇸 United States |
| Corpus Christi LNG | Cheniere | 🇺🇸 United States |
| Cenit | Ecopetrol | 🇨🇴 Colombia |
| Enbridge Mainline System | Enbridge | 🇨🇦 Canada |
| Columbia Pipeline Group | TC Energy | 🇨🇦 Canada |
| Aris Water Solutions | Western Midstream | 🇺🇸 United States |
About the owner: Energy Transfer
Energy Transfer is a publicly listed company headquartered in United States. Brandtree records 5 brands under its control, and it is listed as NYSE: ET.
Energy Transfer's 2025 Form 10-K lists wholly owned pipeline subsidiaries including Panhandle Eastern, Transwestern and Trunkline, and the wholly owned Lake Charles LNG. It also reports consolidated subsidiaries Sunoco LP and USA Compression Partners, and says it owns all of Sunoco LP's general partner.
Energy Transfer: full profile, brands and acquisition history →
🇺🇸 Transwestern Pipeline and other American brands
Brandtree records a controlling owner for 2,399 brands that began in the United States. 461 of them (19%) are now controlled by a company headquartered in another country; Transwestern Pipeline is not one of them.
- AES Ohio — AES 🇺🇸
- Agway Energy Services — Suburban Propane 🇺🇸
- Alabama Power — Southern Company 🇺🇸
- AmeriGas — UGI 🇺🇸
- American Transmission Company — WEC Energy Group 🇺🇸
- Arch Resources — Core Natural Resources 🇺🇸
Frequently asked questions
Who is the parent company of Transwestern Pipeline?
The parent company of Transwestern Pipeline is Energy Transfer, a publicly listed company headquartered in the United States.
Is Transwestern Pipeline American?
Yes. Transwestern Pipeline originated in the United States and its owner, Energy Transfer, is also headquartered in the United States.
Is Transwestern Pipeline still owned by Energy Transfer?
Yes. As of 9 October 2026, Transwestern Pipeline is still owned by Energy Transfer. The ownership record was last checked against primary sources on that date.
Sources (1) & corrections
Last verified . Every ownership fact above is backed by one of these primary documents. Numbers in brackets in the text refer to this list.
- [1] Energy Transfer LP Annual Report on Form 10-K filed 2026-02-19 — SEC EDGAR, SEC Form 10-K, published 19 February 2026; retrieved 5 October 2026.
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