Private company

Peoples Energy

Utility company for the Chicago area

Peoples Gas (short for The Peoples Gas Light and Coke Company) is a gas utility subsidiary of WEC Energy Group serving the city of Chicago, Illinois, and its northern suburbs.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1849Founded1

Peoples Gas (short for The Peoples Gas Light and Coke Company) is a gas utility subsidiary of WEC Energy Group serving the city of Chicago, Illinois, and its northern suburbs.2

Corporate structure

Peoples Energy is part of a group headed by WEC Energy Group. 49 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • WEC Energy Group Madison, Wisconsin, United States
    • INTEGRYS HOLDING, INC. Milwaukee, Wisconsin, United States
      • Wisconsin Public Service Corporation Milwaukee, Wisconsin, United States
      • MICHIGAN GAS UTILITIES CORPORATION Subsidiary · Wilmington, Delaware, United States
      • MINNESOTA ENERGY RESOURCES CORPORATION Subsidiary · Wilmington, Delaware, United States
      • NORTH SHORE GAS COMPANY Subsidiary · Milwaukee, Wisconsin, United States
      • THE PEOPLES GAS LIGHT AND COKE COMPANY Subsidiary · Milwaukee, Wisconsin, United States
    • Peoples Energy Chicago
    • We Energies Milwaukee, Wisconsin, United States
    • American Transmission Company LLC Subsidiary · Wisconsin, United States
    • ATC Development Manager, Inc. Subsidiary · Delaware, United States
    • ATC Holdco LLC Subsidiary · Delaware, United States
    • ATC Holding LLC Subsidiary · Wisconsin, United States
    • ATC Management Inc. Subsidiary · Wisconsin, United States
    • BGS Kimball Gas Storage, LLC Subsidiary · Delaware, United States
    • Bishop Hill Energy III Holdings LLC Subsidiary · Delaware, United States
    • Blooming Grove Wind Energy Center Holdings LLC Subsidiary · Delaware, United States
    • Bluewater Gas Storage, LLC Subsidiary · Delaware, United States
    • Bluewater Natural Gas Holding, LLC Subsidiary · Delaware, United States
    • Coyote Ridge Wind, LLC Subsidiary · Oregon, United States
    • Delilah Solar Holdings LLC Subsidiary · Delaware, United States
    • Elm Road Generating Station Supercritical, LLC Subsidiary · Wisconsin, United States
    • Elm Road Services, LLC Subsidiary · Wisconsin, United States
    • HSE3 Holdings LLC Subsidiary · Delaware, United States
    • Jayhawk Wind, LLC Subsidiary · Delaware, United States
    • Maple Flats Holding LLC Subsidiary · Delaware, United States
    • Michigan Gas Utilities Corporation Subsidiary · Delaware, United States
    • Minnesota Energy Resources Corporation Subsidiary · Delaware, United States
    • North Shore Gas Company Subsidiary · Illinois, United States
    • Port Washington Generating Station, LLC Subsidiary · Wisconsin, United States
    • Samson OpCo Holdings LLC Subsidiary · Delaware, United States
    • and 18 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

Established in 1849, in Chicago, Illinois, The Peoples Gas Light and Coke Company originally made and distributed water gas by forcing steam over hot coke. Peoples Gas grew to become the natural gas delivery supplier to approximately 830,000 residential, commercial, and industrial customers in Chicago. Peoples Gas has approximately 1,500 employees. Services provided to customers and maintenance of approximately 4,300 miles of natural gas main is the primary function of 850 field and support employees, represented by the Gas Workers Union, Local 18007.

In 1931, Chicago was connected with Texas via the Natural Gas Pipeline Company of America, a 980-mile natural gas pipeline, co-owned by Peoples.

Established in 1900, North Shore Natural Gas grew into the natural gas delivery supplier to approximately 158,000 residential, commercial, and industrial customers in 54 communities in the north-suburban area of Chicago in Lake County. In 1963 Peoples Gas purchased North Shore Gas.

In 1980, Peoples Gas changed its name to Peoples Energy Corporation.

In February 2007, the Peoples Energy Corporation merged with Green Bay, Wisconsin-based Wisconsin Public Service Corporation to form the Integrys Energy Group.

Other Integrys subsidiaries at the time included Peoples Energy Resources Company, LLC, Peoples Energy Services Corporation, Peoples Energy Production Company and Peoples District Energy Corporation, providing services in the oil and gas production, natural gas power generation, midstream services, and retail energy services industries. Integrys also owns and operates regulated and non-regulated energy businesses in Michigan, Minnesota and Wisconsin.

In February 2008, the Illinois Commerce Commission granted a controversial Peoples Gas/North Shore Gas request for a customer delivery rate increase. The approval, settled at $71 million, was expected to increase the average monthly customer gas bill by $7, or 4% to 5%. Peoples Gas/North Shore Gas, citing in part it had not filed for an increase in 12 years, initially sought a $102.5 million delivery rate increase in this proceeding.

In 2015, Integrys was acquired by, and became a subsidiary of WEC Energy Group. Peoples Gas continued as a separate operating unit of WEC.

From Wikipedia’s article on Peoples Energy, shared under CC BY-SA 4.0.3

Subsidiaries and ownership

Owners

From Wikidata.1

Timeline

  1. 1849Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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