Who owns Oncor?
Oncor is owned by Sempra (the United States, NYSE: SRE).[1]
Sempra owns 80.25% of Oncor rather than all of it.
Evidence: Sempra Annual Report on Form 10-K filed 2026-02-26, SEC EDGAR, 26 February 2026. Verified from filings; last checked .
Key facts
- Current owner
- Sempra (80.25% stake) verified
- Owner HQ
- 🇺🇸 United States
- Origin
- 🇺🇸 United States
- Category
- Energy › Power & utilities › Grids & transmission
- Parent ticker
- NYSE: SRE
- Last verified
- · 1 sources
About Oncor
Oncor is the Texas electric transmission and distribution utility held by Sempra through Oncor Holdings. Sempra's 2025 10-K says Oncor Holdings, a wholly owned entity of Sempra, owns an 80.25% interest in Oncor, with ring-fencing measures separating it from Sempra.
What Sempra's annual report says about Oncor
Sentences about Oncor from Sempra's latest annual filing[1], copied word for word.
Oncor delivers electricity to end-use consumers through its electrical systems and also provides transmission grid connections to merchant generation facilities and interconnections to other transmission grids in Texas.
Oncor's transmission and distribution assets are located in over 120 counties and more than 400 incorporated municipalities, including the cities of Dallas and Fort Worth and surrounding suburbs, as well as Waco, Wichita Falls, Odessa, Midland, Tyler, Temple, Killeen and Round Rock, among others.
Most of Oncor's power lines have been constructed over lands of others pursuant to easements or along public highways, streets and rights-of-way pursuant to permits, public utility easements, franchise or other agreements or as otherwise permitted by law.
How often Sempra names Oncor 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. The brand is named more often than it was three years earlier.
Ownership timeline of Oncor
Where Oncor sits in Sempra
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Sempra ownership tree →
See the full Sempra brand portfolio (4) →
Other brands owned by Sempra
Sempra controls 4 brands on Brandtree, 4 of them in energy.
Also in energy
Other brands in grids & transmission, and who owns them
The 11 brands in grids & transmission on Brandtree belong to 9 owners. The largest is ESB, with 2.
| Brand | Owner | Owner based in |
|---|---|---|
| ESB Networks | ESB | 🇮🇪 Ireland |
| SSEN Distribution | SSE | 🇬🇧 United Kingdom |
| ISA | Ecopetrol | 🇨🇴 Colombia |
| ITC | Fortis | 🇨🇦 Canada |
| Hydro One Networks | Hydro One | 🇨🇦 Canada |
| J-POWER Transmission Network | J-POWER | 🇯🇵 Japan |
| Kansai Transmission and Distribution | Kansai Electric Power | 🇯🇵 Japan |
| American Transmission Company | WEC Energy Group | 🇺🇸 United States |
About the owner: Sempra
Sempra is a publicly listed company headquartered in United States. Brandtree records 4 brands under its control, and it is listed as NYSE: SRE.
Sempra's 2025 Form 10-K organises its business into Sempra California, Sempra Texas Utilities and Sempra Infrastructure. It says Oncor Holdings is a wholly owned entity of Sempra that owns an 80.25% interest in Oncor, and that Sempra holds 70% of SI Partners (the Sempra Infrastructure partnership), with KKR Pinnacle at 20% and ADIA at 10%. The filing describes a planned sale of part of its SI Partners interest.
🇺🇸 Oncor 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; Oncor 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 Oncor?
The parent company of Oncor is Sempra, a publicly listed company headquartered in the United States.
Is Oncor American?
Yes. Oncor originated in the United States and its owner, Sempra, is also headquartered in the United States.
Is Oncor still owned by Sempra?
Yes. As of 11 October 2026, Oncor is still owned by Sempra (80.25% stake). 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] Sempra Annual Report on Form 10-K filed 2026-02-26 — SEC EDGAR, SEC Form 10-K, published 26 February 2026; retrieved 5 October 2026.
Report a correction Opens a pre-filled GitHub issue. See our corrections policy.