I tried to find out how many shares BlackRock held, but couldn't find their position where it used to be. After doing some digging I found out they terminated the ISHARES S&P/TSX VENTURE INDEX FUND.
http://www.blackrock.com/ca/individual/en/lit...rough=true

Last time I checked was 21/08/2015, BlackRock held 164,037, (decreased from 202,730 & previously 217,741).