The Ontario Teachers' Pension Plan Board is an independent organization responsible for administering defined-benefit pensions for school teachers of the Canadian province of Ontario. Ontario Teachers' also invests the plan's pension fund and it is one of the world's largest institutional investors, acting as a partner organization of the World Economic Forum. The plan is a multi-employer pension plan, jointly sponsored by the Government of Ontario and the Ontario Teachers' Federation. Ontario Teachers' achieved a 11.1% one-year total-fund net return in 2021 and achieved its ninth consecutive fully funded year.