​​​​​St. Marys is known as the Stonetown and the first settlers arrived there in the early 1840s, attracted by the area's natural resources. At the town site, the Thames River cascaded over a series of limestone ledges, providing the power to run the first pioneer mills. In the riverbed and along the banks, limestone was close to the surface and could be quarried for building materials. The founders Lind and Rogers capitalized on this natural raw material, and grew their business to be a major producer of cement in the province of Ontario.

St Marys Cement is one of the oldest cement companies in North America and a major producer of cementitious related materials in the Great Lakes Region. The company expanded over the past century and now it has four cement plants, strategically located to serve Canadian and U.S. customers around the Lakes. Today St Marys Cement is the cornerstone of the North American operations of Votorantim Cimentos, a Brazilian company, based in Sao Paulo, Brazil.

St Marys Cement is a leading manufacturer of cement and related construction products in the United States and Canada. Headquartered in Toronto, Ontario, Canada, St Marys Cement 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 is a wholly-owned subsidiary of Votorantim Cimentos, an international cement manufacturer based in Sao Paulo, Brazil.

For more than a century 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 include cementitious materials from St Marys Cement, ready-mixed concrete and aggregate from St Marys CBM and logistic services from Hutton Transport Ltd.​