Private company
The United Illuminating Company
Logo: The logo may be obtained from The United Illuminating Company., Non-free logo, via Wikipedia4
Electric distribution company in Connecticut
The United Illuminating Company (UI) is a regional electric distribution company based in Orange, Connecticut. Established in 1899, UI is engaged in the purchase, transmission, distribution and sale of electricity and related services to 325,000 residential, commercial and industrial customers in 17 towns and cities in the greater New Haven and Bridgeport areas.2 It is part of UIL Holdings Corporation.1 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
- Industryelectricity supply company1
- HeadquartersOrange1
- Websiteuinet.com
- Legal formStock Corporation3
- LEI549300B4YGCZQQ06TA033
- StatusActive3
- LEI statusIssued and current3
- Registered addressGOODWIN SQUARE, 225 ASYLUM STREET 20TH FLOOR, 06103 Hartford, United States3
- Registered withSecretary of the State's Commercial Recording Division, 01591063
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The United Illuminating Company (UI) is a regional electric distribution company based in Orange, Connecticut. Established in 1899, UI is engaged in the purchase, transmission, distribution and sale of electricity and related services to 325,000 residential, commercial and industrial customers in 17 towns and cities in the greater New Haven and Bridgeport areas.2
Corporate structure
The United Illuminating Company is part of a group headed by Avangrid. 31 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.
- Avangrid Orange, Connecticut, United States
- Connecticut Natural Gas East Hartford, Connecticut, United States
- New York State Electric & Gas Albany, New York, United States
- New York Central Electric Subsidiary · United States
- Rochester Gas & Electric Rochester, New York, United States
- Southern Connecticut Gas Orange, Connecticut, United States
- The United Illuminating Company Orange, Connecticut, United States
- Avangrid Networks, Inc. Subsidiary · Maine, United States
- AVANGRID POWER, LLC Subsidiary · Portland, Oregon, United States
- ATLANTIC RENEWABLE PROJECTS II LLC Subsidiary · Portland, Oregon, United States
- Bluebird Solar Power, LLC Subsidiary · Portland, Oregon, United States
- CAMINO SOLAR, LLC Subsidiary · Portland, Oregon, United States
- CASSELMAN WINDPOWER LLC Subsidiary · Portland, Oregon, United States
- Juniper Canyon Wind Power LLC Subsidiary · Portland, Oregon, United States
- KARANKAWA WIND, LLC Subsidiary · Wilmington, Delaware, United States
- Leaning Juniper Wind Power II, LLC Subsidiary · Portland, Oregon, United States
- MOHAWK SOLAR LLC Subsidiary · Portland, Oregon, United States
- OREGON TRAIL SOLAR, LLC Subsidiary · Portland, Oregon, United States
- OSAGROVE FLATS SOLAR, LLC Subsidiary · Portland, Oregon, United States
- PATRIOT WIND FARM, LLC Subsidiary · Wilmington, Delaware, United States
- PONTOTOC WIND, LLC Subsidiary · Portland, Oregon, United States
- PPM ROARING BROOK, LLC Subsidiary · Portland, Oregon, United States
- SOUTH CHESTNUT LLC Subsidiary · Portland, Oregon, United States
- STREATOR-CAYUGA RIDGE WIND POWER LLC Subsidiary · Portland, Oregon, United States
- VINEYARD WIND 1 LLC Subsidiary · New Bedford, Massachusetts, United States
- Avangrid Renewables Holdings, Inc. Subsidiary · Delaware, United States
- Avangrid Renewables, LLC Subsidiary · Oregon, United States
- CENTRAL MAINE POWER COMPANY Subsidiary · Augusta, Maine, United States
- Maine Natural Gas Corporation Subsidiary · Maine, United States
- THE BERKSHIRE GAS COMPANY Subsidiary · Pittsfield, Massachusetts, United States
- UIL Holdings Corporation Subsidiary · Connecticut, United States
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.
Products and brands
- electric power transmission
Listed on Wikidata.1
Subsidiaries and ownership
Parent company
- Avangrid
- UIL Holdings Corporation since 2000
From Wikidata.1
Timeline
Links
- Websiteuinet.com1
- X (Twitter)x.com/unitedillum1
- Facebookwww.facebook.com/UnitedIlluminating1
- WikipediaThe United Illuminating Company
- WikidataQ7771571
Sources
The numbers on this page point here. Each one links to the record it came from.
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