Who owns American Transmission Company?
American Transmission Company is owned by WEC Energy Group (the United States, NYSE: WEC).[1]
WEC Energy Group owns 60% of American Transmission Company rather than all of it.
Evidence: WEC Energy Group, Inc. Annual Report on Form 10-K filed 2026-02-20, SEC EDGAR, 20 February 2026. Verified from filings; last checked .
Key facts
- Current owner
- WEC Energy Group, Inc. (60% stake) verified
- Owner HQ
- 🇺🇸 United States
- Origin
- 🇺🇸 United States
- Category
- Energy › Power & utilities › Grids & transmission
- Parent ticker
- NYSE: WEC
- Last verified
- · 1 sources
About American Transmission Company
ATC is a regional transmission company that owns and operates electric transmission systems in Wisconsin, Michigan, Illinois and Minnesota. WEC Energy Group's 2025 10-K says it owned approximately 60% of ATC at 31 December 2025.
What WEC Energy Group's annual report says about American Transmission Company
Sentences about American Transmission Company from WEC Energy Group's latest annual filing[1], copied word for word.
American Transmission Company Allowed Return on Equity Complaint The ROE allowed by the FERC helps determine how much transmission owners, such as ATC, earn on their transmission assets as well as how much consumers pay for those assets.
How often WEC Energy Group names American Transmission Company 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 less often than it was three years earlier.
Ownership timeline of American Transmission Company
- Current owner WEC Energy Group (60%) [1] verified
Where American Transmission Company sits in WEC Energy Group
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full WEC Energy Group ownership tree →
See the full WEC Energy Group brand portfolio (5) →
Other brands owned by WEC Energy Group
WEC Energy Group controls 5 brands on Brandtree, 5 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 |
| Oncor | Sempra | 🇺🇸 United States |
About the owner: WEC Energy Group
WEC Energy Group is a publicly listed company headquartered in United States. Brandtree records 5 brands under its control, and it is listed as NYSE: WEC.
WEC Energy Group's 2025 Form 10-K says it serves approximately 1.7 million electric and 3.0 million natural gas customers, owns approximately 60% of American Transmission Company (ATC), and owns majority interests in several renewable generating facilities in its non-utility energy infrastructure segment.
WEC Energy Group: full profile, brands and acquisition history →
🇺🇸 American Transmission Company 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; American Transmission Company is not one of them.
- AES Ohio — AES 🇺🇸
- Agway Energy Services — Suburban Propane 🇺🇸
- Alabama Power — Southern Company 🇺🇸
- AmeriGas — UGI 🇺🇸
- Arch Resources — Core Natural Resources 🇺🇸
- Aris Water Solutions — Western Midstream 🇺🇸
Frequently asked questions
Who is the parent company of American Transmission Company?
The parent company of American Transmission Company is WEC Energy Group, a publicly listed company headquartered in the United States.
Is American Transmission Company American?
Yes. American Transmission Company originated in the United States and its owner, WEC Energy Group, is also headquartered in the United States.
Is American Transmission Company still owned by WEC Energy Group?
Yes. As of 10 October 2026, American Transmission Company is still owned by WEC Energy Group (60% 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] WEC Energy Group, Inc. Annual Report on Form 10-K filed 2026-02-20 — SEC EDGAR, SEC Form 10-K, published 20 February 2026; retrieved 5 October 2026.
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