AIMCo is buying an 8% stake in TransAlta Renewables (TAR) “on behalf of certain of clients”, a group that includes 27 pension, endowment and government funds in the province.

Toronto-listed TAR owns 1.7GW of renewables capacity in North America, the majority of it wind and the remainder hydro.

AIMCo will buy the stake from TransAlta, TAR's parent, which spun off the yieldco-like company in 2013.