Private company
Independent Electricity System Operator
Logo: IESO, Public domain, via Wikimedia Commons4
Electric utility in Ontario, Canada
The Independent Electricity System Operator (IESO) is the Crown corporation responsible for operating the electricity market and directing the operation of the bulk electrical system in the province of Ontario, Canada. It is one of seven independent system operators in North America. The IESO was established in April 1999 as the Independent Electricity Market Operator (IMO) under the government of Ontario during the premiership of Mike Harris in preparation for deregulation of the province's electrical supply and transmission system.2 It is headquartered in Toronto.1 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
Overview
- Industryelectric power industry1
- HeadquartersToronto1
- Websitewww.ieso.ca
- Legal formOperator3
- LEI549300H5RGV9MJD7MI783
- StatusActive3
- LEI statusLapsed (not renewed)3
- Registered address120 Adelaide Street West, M5H 1T1 Toronto, Canada3
See how the biggest companies compare on our leaderboards
The Independent Electricity System Operator (IESO) is the Crown corporation responsible for operating the electricity market and directing the operation of the bulk electrical system in the province of Ontario, Canada. It is one of seven independent system operators in North America.2
Products and brands
- electricity
Listed on Wikidata.1
Acquisitions
- Succeeded Ontario Hydro1
Timeline
- 1998Founded Founded1
Links
- Websitewww.ieso.ca1
- WikipediaIndependent Electricity System Operator
- WikidataQ3150024
Sources
The numbers on this page point here. Each one links to the record it came from.
- 1
- 2
- 3
- 4Wikimedia CommonsIndependent Electricity System Operator logo by IESO, Public domain