Stronach Group, doing business as 1/ST (pronounced "first"[1]), is an entertainment and real estate company in North America with thoroughbred horse racing and parimutuel gambling at the core.

In March 2000, Magna International distributed shares in its new division to its current stockholders, establishing MEC as a separate public company.

The Stronach Group entered the horse racing industry by purchasing Magna Entertainment Corporation's former holdings from MI Developments.

Other ventures include Xpressbet, a wagering business that allows customers to wager on over 100 horse racing tracks via internet or telephone Stronach Group also owns thoroughbred training facilities in conjunction with its racetracks in California, Florida, and Maryland, and owns and operates facilities that manufacture a straw-based bedding product, StreuFex.

On March 23, 2010 an agreement was reached to sell the two Maryland Jockey Club tracks (Pimlico and Laurel Park) from Magna Entertainment Corporation to its parent company MI Developments.