Avangrid

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United States energy company operating electric and natural-gas networks alongside renewable-generation businesses.

Last updated August 22, 2026

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Overview

Avangrid is a United States energy company whose businesses center on regulated electricity and natural-gas distribution, renewable power generation, and energy infrastructure. Its operating footprint is concentrated in New York and New England, where subsidiaries serve approximately 3.1 million customers. The company’s principal regulated utilities include Central Maine Power in Maine, New York State Electric & Gas and Rochester Gas and Electric in New York, and The United Illuminating Company, Connecticut Natural Gas, Southern Connecticut Gas, and Berkshire Gas in the Northeast. Avangrid Renewables develops and operates renewable-generation assets, including wind and solar projects, and the company has also pursued offshore-wind development along the Atlantic coast. The organization grew out of Energy East, a US utility company acquired by Spain-based Iberdrola in 2008. Following the acquisition, the business was renamed Iberdrola USA. During the early 2010s, Iberdrola USA streamlined its portfolio by selling several gas-distribution companies in Connecticut and Massachusetts to UIL Holdings and divesting energy-services businesses to Direct Energy. In 2015, Iberdrola USA agreed to combine with UIL Holdings. The transaction closed in December of that year, and the enlarged business adopted the Avangrid name. Avangrid has combined conventional utility responsibilities with a stated emphasis on decarbonization and electrification. Its activities include maintaining distribution grids, supplying regulated gas service, developing renewable generation, supporting electric-vehicle adoption, and investing in grid modernization. The company has backed consumer electric-vehicle incentives in Connecticut, installed charging infrastructure at facilities, and organized employee outreach intended to encourage electric-vehicle purchases. It has also explored digital inspection and automation technologies, including a pilot with Boston Dynamics using robots and artificial intelligence at substations. Offshore wind became a significant part of Avangrid’s development strategy. In 2017, the company won a federal lease auction for an offshore-wind area off North Carolina. It subsequently divided the lease into northern and southern portions. In 2024, Avangrid sold the Kitty Hawk North portion to a Dominion Energy subsidiary while retaining Kitty Hawk South, which remained in planning and permitting. Avangrid is also a partner in Vineyard Wind, a large offshore-wind project off the Massachusetts coast that began generating electricity in January 2024. In the same period, it expanded a renewable-energy relationship with Amazon through a 98.4-megawatt wind project in Oregon and supported solar grazing in the Pacific Northwest. Iberdrola’s ownership increased over time. In 2024, Iberdrola agreed to acquire the remaining 18.4 percent of Avangrid that it did not already own for approximately $2.55 billion. The transaction closed in December 2024, transforming Avangrid from a separately listed public company into a wholly owned Iberdrola subsidiary. Avangrid continues to operate under its own brand and through its regional utility and renewable-energy subsidiaries. In 2025, its activities included installing more than 650 smart-grid devices in Maine and New York and advancing a proposed five-year workforce and grid-strengthening program for Central Maine Power.

History

Avangrid’s corporate history is rooted in Energy East, a US energy company with electric and natural-gas utility operations. Iberdrola S.A. acquired Energy East in 2008 and subsequently renamed the business Iberdrola USA. The acquisition gave Iberdrola a substantial regulated-utility platform in the northeastern United States and established the foundation for its later US expansion. During the Iberdrola USA period, the company reshaped its portfolio. In November 2010, it sold Southern Connecticut Gas, Connecticut Natural Gas, and Berkshire Gas to UIL Holdings Corporation. In 2012, it sold its energy-services businesses, Energetix and NYSEG Solutions, to Direct Energy. These transactions reduced the scope of Iberdrola USA’s non-core activities while leaving it focused more heavily on regulated utility networks and related energy operations. In February 2015, Iberdrola USA announced an agreement to merge with UIL Holdings. Under the transaction structure, UIL Holdings was to merge into a subsidiary of Iberdrola USA. The combination brought together Iberdrola USA’s existing operations with UIL’s Connecticut utility businesses, including The United Illuminating Company and gas-distribution activities. The transaction was completed in December 2015, and the combined company was rebranded Avangrid. After its formation, Avangrid operated through a collection of regional utilities and renewable-energy businesses. Its regulated operations included Central Maine Power, New York State Electric & Gas, Rochester Gas and Electric, The United Illuminating Company, Connecticut Natural Gas, Southern Connecticut Gas, Berkshire Gas, and Maine Natural Gas. Avangrid Renewables provided a platform for wind, solar, and other renewable-development activities. The company’s customer base extended across New England and New York, with approximately 3.1 million customers served through its utilities. Renewable development and electrification became prominent elements of Avangrid’s strategy. In March 2017, it won rights to an offshore-wind area off North Carolina in a federal Bureau of Ocean Energy Management auction, submitting a $9 million bid. The lease was later divided into Kitty Hawk North and Kitty Hawk South. In 2023, Avangrid sought additional time for federal permitting in connection with Kitty Hawk South so that it could evaluate routes to market and interconnection alternatives. In 2024, it sold Kitty Hawk North to Virginia Electric and Power Company, a Dominion Energy subsidiary, but retained Kitty Hawk South, which remained in planning and permitting. Avangrid also participated in the development of Vineyard Wind with Copenhagen Infrastructure Partners. The project began producing electricity in January 2024 and became one of the most important offshore-wind developments associated with the company. Other 2024 initiatives included an expanded renewable-energy arrangement with Amazon involving a 98.4-megawatt Oregon wind project, a pilot with Boston Dynamics using robotics and artificial intelligence for substation inspections, and a large solar-grazing project with an Oregon rancher. The company has supported transport electrification as well. In 2017, Avangrid donated $2 million to Connecticut’s Hydrogen and Electric Automobile Purchase Rebate program. It also installed charging stations at several facilities and held an employee electric-vehicle fair in 2018. These efforts complemented its wider emphasis on electrification and grid investment. Avangrid’s regulated-utility responsibilities have also brought compliance scrutiny. In 2021, Central Maine Power was fined $360,000 for violating industry testing standards associated with electrical stability and outage prevention. In 2025, Avangrid reported the installation of more than 650 smart devices on grids in Maine and New York, while Central Maine Power submitted a proposed five-year workforce and grid-strengthening program to Maine regulators. Iberdrola remained Avangrid’s controlling shareholder after the 2015 formation. In 2024, Iberdrola agreed to acquire the remaining 18.4 percent stake it did not already own for approximately $2.55 billion. The transaction closed in December 2024, making Avangrid a wholly owned Iberdrola subsidiary. Avangrid continues to operate as a branded US energy platform with regulated utility and renewable-energy activities.

2024
Vineyard Wind begins generation
[1]Avangriden.wikipedia.org
The Avangrid and Copenhagen Infrastructure Partners project began producing electricity.
2024
Iberdrola completes full acquisition
[1]Avangriden.wikipedia.org
Iberdrola acquired the remaining Avangrid shares and made the company wholly owned.
2017
North Carolina offshore-wind lease awarded
[1]Avangriden.wikipedia.org
Avangrid won federal auction rights to develop an offshore-wind area off North Carolina.
2015
UIL merger completed and Avangrid brand launched
[1]Avangriden.wikipedia.org
Iberdrola USA completed its combination with UIL Holdings and adopted the Avangrid name.
2012
Energy-services businesses divested
[1]Avangriden.wikipedia.org
Energetix and NYSEG Solutions were sold to Direct Energy.
2010
Gas-distribution businesses sold to UIL Holdings
[1]Avangriden.wikipedia.org
Iberdrola USA sold Southern Connecticut Gas, Connecticut Natural Gas, and Berkshire Gas to UIL Holdings.
2008
Iberdrola acquires Energy East
[1]Avangriden.wikipedia.org
Iberdrola purchased Energy East and renamed the business Iberdrola USA.

Products and positioning

A regulated utility and renewable-energy platform focused on reliable regional energy delivery, grid modernization, electrification, and the transition toward lower-carbon generation.

Utility service
Regulated electricity distribution
Avangrid delivers electricity through regional utility subsidiaries serving customers in New York and New England. The businesses operate regulated distribution networks, maintain local grid infrastructure, connect customers, and undertake reliability and modernization projects. Major electric utilities associated with the group include Central Maine Power, New York State Electric & Gas, Rochester Gas and Electric, and The United Illuminating Company.
Utility service
Natural-gas distribution
Avangrid’s gas utilities provide regulated natural-gas distribution in parts of the Northeast. The portfolio includes Connecticut Natural Gas, Southern Connecticut Gas, Berkshire Gas, and Maine Natural Gas. These businesses operate local distribution systems and related customer-service and infrastructure functions. The portfolio has changed over time, including the earlier sale of several gas companies to UIL Holdings before the Avangrid combination.
Renewable energy
Renewable power generation
Avangrid Renewables develops and operates renewable-generation projects, including wind and solar assets. Its activities extend beyond utility distribution into project development, power production, commercial renewable-energy partnerships, and new technologies intended to support the energy transition. The company has worked with commercial partners such as Amazon and has supported solar grazing as a way to combine land management with renewable generation.
Renewable energy · 2024
Offshore wind
Avangrid develops offshore-wind opportunities through lease areas and joint ventures. Its portfolio includes the Vineyard Wind project with Copenhagen Infrastructure Partners and the Kitty Hawk South lease area off North Carolina. Vineyard Wind began generating electricity in 2024. Avangrid sold the Kitty Hawk North portion in 2024 while retaining Kitty Hawk South for further planning and permitting.

Controversies

2021
Central Maine Power testing-standard violations
Central Maine Power was fined $360,000 for violating industry testing standards intended to maintain electrical stability and help prevent outages.
Source
2019
Avangrid agrees to pay $450,000 fine over reliability-standard violations
Avangrid agreed to pay a $450,000 fine assessed for violations of transmission standards intended to maintain regional grid reliability. The reported incidents involved CMP, New York State Electric and Gas, and Rochester Gas and Electric; the settlement still required Federal Energy Regulatory Commission approval.
Source

2024Avangrid-Amazon renewable-energy partnership
United States · Oregon
Avangrid and Amazon expanded their renewable-energy relationship through a 98.4-megawatt wind project in Oregon.
Outcome. The project broadened Avangrid’s commercial renewable-energy activity and Amazon’s renewable-power sourcing.
Source
2024Boston Dynamics substation-inspection pilot
United States
Avangrid partnered with Boston Dynamics on a pilot using robots and artificial intelligence to enhance inspections at electrical substations.
Outcome. The pilot explored automation and digital tools for utility inspection work.
Source
2024Pacific Northwest solar grazing project
United States · Oregon
Avangrid partnered with an Oregon rancher on one of the largest solar-grazing operations in the Pacific Northwest.
Outcome. The project combined solar generation with agricultural land use and livestock grazing.
Source
2018Employee electric-vehicle fair
United States
Avangrid held an electric-vehicle fair for employees and installed charging stations at several facilities as part of its electrification efforts.
Outcome. The initiative was intended to increase employee awareness and facilitate electric-vehicle adoption.
Source
2017Connecticut electric-vehicle rebate support
Connecticut
Avangrid donated $2 million to Connecticut’s Hydrogen and Electric Automobile Purchase Rebate program, which provides consumer incentives for qualifying zero-emission vehicles.
Outcome. The contribution supported a state incentive program promoting electric and hydrogen vehicle adoption.
Source

Brand decisions

2024
Iberdrola acquisition of remaining Avangrid sharesM&A
Background
Iberdrola already controlled Avangrid but did not own the remaining publicly held minority stake.
Action taken
Iberdrola agreed to acquire the remaining 18.4 percent stake and completed the transaction in December 2024.
Aftermath
Avangrid became a wholly owned subsidiary of Iberdrola and ceased to be a separately listed public company.
Purchase price. Approximately $2.55 billion (2024 transaction; closed December 2024)
Source
2017
Entry into North Carolina offshore windStrategy
Background
Avangrid pursued offshore wind as part of its renewable-generation and energy-transition strategy.
Action taken
It won federal auction rights to an offshore-wind area off North Carolina and later divided the lease into northern and southern sections.
Aftermath
Avangrid later sold Kitty Hawk North but retained Kitty Hawk South for continued planning and permitting.
Federal lease-auction bid. $9 million (March 2017)
Source
2015
Combination with UIL HoldingsM&A
Background
Iberdrola USA sought to combine its northeastern utility platform with UIL Holdings’ Connecticut operations.
Action taken
UIL Holdings merged into a subsidiary of Iberdrola USA, and the combined business was renamed Avangrid after closing.
Aftermath
The transaction created the Avangrid corporate platform and added UIL’s electric and gas utility operations.
Source
2012
Sale of energy-services businessesM&A
Background
Iberdrola USA continued narrowing its business portfolio toward utility and energy-infrastructure operations.
Action taken
It sold Energetix and NYSEG Solutions to Direct Energy.
Aftermath
The transaction removed two energy-services businesses from Iberdrola USA.
Source
2010
Sale of Connecticut and Massachusetts gas utilitiesM&A
Background
Iberdrola USA reviewed its regional utility portfolio after Iberdrola’s acquisition of Energy East.
Action taken
It sold Southern Connecticut Gas, Connecticut Natural Gas, and Berkshire Gas to UIL Holdings.
Aftermath
The divestiture reduced Iberdrola USA’s gas-distribution holdings before its later combination with UIL Holdings.
Source

Recent events

2025
Avangrid installs smart-grid devices in Maine and New York[1]Avangriden.wikipedia.org
Product launch · Other
The company installed more than 650 smart devices on power grids in Maine and New York.
2025
Central Maine Power proposes workforce and grid-strengthening program[1]Avangriden.wikipedia.org
Regulation
Central Maine Power filed a proposal with the Maine Public Utilities Commission for a five-year workforce and grid-strengthening initiative.
2024
Iberdrola agrees to acquire Avangrid minority stake[1]Avangriden.wikipedia.org
M&A
Iberdrola reached an agreement to purchase the approximately 18.4 percent of Avangrid that it did not already control for about $2.55 billion.
2024
Avangrid becomes wholly owned Iberdrola subsidiary[1]Avangriden.wikipedia.org
M&A
The transaction for Iberdrola to acquire Avangrid's remaining publicly held shares closed in December 2024.
2024
Vineyard Wind begins generating electricity[1]Avangriden.wikipedia.org
Product launch · Other
Vineyard Wind, developed by Avangrid and Copenhagen Infrastructure Partners, began electricity generation off the Massachusetts coast.
2024
Avangrid sells Kitty Hawk North offshore-wind lease area[1]Avangriden.wikipedia.org
M&A
Avangrid sold the Kitty Hawk North portion of its North Carolina offshore-wind lease to Virginia Electric and Power Company, a Dominion Energy subsidiary, while retaining Kitty Hawk South.
2024
Avangrid and Amazon expand renewable-energy partnership[1]Avangriden.wikipedia.org
Campaign · Product launch
The companies expanded their renewable-energy relationship through a 98.4-megawatt wind project in Oregon.

Sources8 sources

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