Semex is owned by three well-established Canadian A.I. organizations - WestGen, EastGen and CIAQ. Started by farmers and still owned by farmers, Semex is the fastest growing company in today's genetic solution market.

Semex prides themselves on being the only company offering immune genetics for greater disease resistance. In 1974, the year Semex was founded, 17,016 doses were shipped to nine countries under the guidance of Roy G. Snyder, Secretary-Manager of Ontario Association of Animal Breeders. Every year, sales doubled and due to the increasing international demand for Canadian genetics, Roy G. Snyder's vision was to create an export company. He convinced A.I. organizations across Canada to sign an agreement to form Semen Exports Canada in 1974. The name was later shortened to Semex Canada.