TORONTO, August 24, 2011 — GMP Capital Inc. (“GMP”) (TSX: GMP) announced today that Michael
Wekerle, Vice Chairman, GMP Securities L.P., will be retiring effective August 24, 2011, having
transitioned out of his day-to-day role on the trading desk earlier this year. Mr. Wekerle joined GMP in
1995 and co-founded the firm’s sales and trading operations.