Who owns Nicor Gas?
Nicor Gas is owned by Southern Company (the United States, NYSE: SO).[1]
Evidence: The Southern Company Annual Report on Form 10-K filed 2026-02-19, SEC EDGAR, 19 February 2026. Verified from filings; last checked .
Key facts
- Current owner
- The Southern Company verified
- Owner HQ
- 🇺🇸 United States
- Origin
- 🇺🇸 United States
- Category
- Energy › Power & utilities › Gas utilities
- Parent ticker
- NYSE: SO
- Last verified
- · 1 sources
About Nicor Gas
Nicor Gas (Northern Illinois Gas Company) is a natural gas distribution utility that the Southern Company 10-K defines as a wholly-owned subsidiary of Southern Company Gas.
What Southern Company's annual report says about Nicor Gas
Sentences about Nicor Gas from Southern Company's latest annual filing[1], copied word for word.
For example, beginning in 2024, Nicor Gas' regulator, the Illinois Commission, has conducted "future of natural gas" proceedings to explore the recommendations involved with decarbonization of the gas distribution system in Illinois.
How often Southern Company names Nicor Gas 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 Nicor Gas
- Current owner Southern Company [1] verified
Where Nicor Gas sits in Southern Company
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Southern Company ownership tree →
See the full Southern Company brand portfolio (7) →
Other brands owned by Southern Company
Southern Company controls 7 brands on Brandtree, 7 of them in energy.
Also in energy
Other brands in gas utilities, and who owns them
The 14 brands in gas utilities on Brandtree belong to 11 owners. The largest is ONE Gas, with 3; Southern Company has 2.
| Brand | Owner | Owner based in |
|---|---|---|
| Kansas Gas Service | ONE Gas | 🇺🇸 United States |
| Comgás | Cosan | 🇧🇷 Brazil |
| Enbridge Gas Ontario | Enbridge | 🇨🇦 Canada |
| FortisBC | Fortis | 🇨🇦 Canada |
| Daigas Energy | Osaka Gas | 🇯🇵 Japan |
| Agway Energy Services | Suburban Propane | 🇺🇸 United States |
| Towngas | Towngas | 🇭🇰 Hong Kong |
| Mountaineer Gas | UGI | 🇺🇸 United States |
About the owner: Southern Company
Southern Company is a publicly listed company headquartered in United States. Brandtree records 7 brands under its control, and it is listed as NYSE: SO.
Southern Company's 2025 Form 10-K says it is a holding company that owns all of the outstanding common stock of three traditional electric operating companies (Alabama Power, Georgia Power, Mississippi Power), Southern Power Company and Southern Company Gas. It also owns Southern Company Services, Southern Linc, Southern Nuclear and PowerSecure.
Southern Company: full profile, brands and acquisition history →
🇺🇸 Nicor Gas 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; Nicor Gas is not one of them.
- AES Ohio — AES 🇺🇸
- Agway Energy Services — Suburban Propane 🇺🇸
- AmeriGas — UGI 🇺🇸
- American Transmission Company — WEC Energy Group 🇺🇸
- Arch Resources — Core Natural Resources 🇺🇸
- Aris Water Solutions — Western Midstream 🇺🇸
Frequently asked questions
Who is the parent company of Nicor Gas?
The parent company of Nicor Gas is Southern Company, a publicly listed company headquartered in the United States.
Is Nicor Gas American?
Yes. Nicor Gas originated in the United States and its owner, Southern Company, is also headquartered in the United States.
Is Nicor Gas still owned by Southern Company?
Yes. As of 9 October 2026, Nicor Gas is still owned by Southern Company. 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] The Southern Company 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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