Financial Reporting

Annual Report

The 2025 Annual Report provides financial statements and a broad overview of achievements and initiatives that reflect the IESO’s progress toward ensuring Ontario’s electricity system continues to be reliable, affordable, sustainable, and ready to support economic growth. In alignment with our efforts to deliver value for ratepayers and future-proof Ontario’s grid, the report also highlights the IESO’s commitment to the three pillars of our Corporate Strategy: Drive and Guide the Sector’s Future; Advance Reliability and Cost-Effectiveness in an Evolving System; and Drive Business Transformation.

2025 Annual Report (PDF)
April 30, 2026

En français

 

Markets Financial Statements


 

For historical annual reports or market financial reports, please contact us at financial.controller@ieso.ca and specify the year and quarter requested, and advise whether it needs to be provided in an accessible format.