St Marys Cement Inc. is a leading manufacturer of cement and related construction products in the United States and Canada. Headquartered in Toronto, Ontario, Canada, St Marys Cement Inc. supplies cementitious materials to the Great Lakes Region and is also a significant producer of concrete and aggregates to the Ontario market. St Marys Cement Inc. is a wholly-owned subsidiary of Votorantim Cimentos, an international cement manufacturer based in Sao Paulo, Brazil.

For more than 90 years St Marys Cement has been contributing to the construction industry around the Great Lakes. Today the company has manufacturing plants located strategically to serve the Canadian and United States markets and has docking facilities in both countries to take advantage of efficient water transportation. Products of St Marys Cement Inc. include cementitious materials from St Marys Cement, ready-mixed concrete and aggregate from St Marys CBM and logistic services from Hutton Transport Ltd.