Caisse becomes largest shareholder of Alstom with 18% stakeAlstom said Caisse de dpt et placement du Quebec, a large pension fund in the Canadian province with a 32.5% stake in Bombardier's train business, will use its cash proceeds from the sale to buy Alstom stock. It will invest another EUR700 million in Alstom shares to become the company's biggest shareholder, with an 18% stake and two board seats.