An organization that oversees the pension plan for public school teachers in Ontario, Canada. The organization was established in 1989 and is responsible for investing approximately $100 billion CAD, making it one of the biggest investment organizations in Canada.

The Ontario Teachers’ Pension Plan is the largest single-profession pension plan in Canada, administering the pensions of 175,000 teachers and school staff and paying benefits to 114,000 retirees. The plan experienced pension shortfalls in the wake of the financial crisis of 2008-2009.