1st Rochdale Cooperative
USA, electric power, co-op

4-County Electric Power Association
USA, electric distribution cooperative, located in Northeast Mississippi

A & N Electric Cooperative, Inc.
USA, electric co-operative

ACTEW Corporation Limited
Australia, electricity, gas, water and wastewater services

Adams Electric
USA, non-profit, member-owned electric utility serving counties in southcentral Pennsylvania

Aegis Energy Services, Inc.
USA, co-generation

AES Corporation
USA, generation, distribution and retail supply

AES Yarra Power Station
Australia, power station

Agralite Electric Cooperative
USA, electric cooperative

Ahmedabad Electricity Company Ltd.
India, electrical generation

Aiken Electric Cooperative, Inc.
USA, first cooperative chartered in South Carolina

Alabama Electric Cooperative (AEC)
USA, generation and transmission cooperative

Alabama Power
USA, power generation

Alameda Power & Telecom
USA, municipal electric utility in the State of California

Alaska Electric Light and Power Company
USA, electric utility

Alaska Village Electric Cooperative, Inc.
USA, electric cooperative