ZURICH, Aug 15, 2007 (AFP) - The Swiss group Holcim, one of the world's largest cement companies, said Wednesday it had succesfully gained full ownership of Canada's St Lawrence Cement Group after buying out minority shareholders.

The cash offer it launched in May -- which was valued at 571 million Canadian dollars (493 million dollars, 374 million euros) before an independent review -- had been completed, Holcim said in a statement.

The shares were delisted from the Toronto Stock Exchange on Monday, it added.