Only optometrists who are registered in Ontario and registrants of the College may be shareholders in an Optometry Professional Corporation (OPC). This applies both to voting and non-voting shares. Holding/numbered companies may not own or be shareholders in an OPC. Family members cannot be shareholders in an OPC, unless they are also optometrists and licensed in Ontario (NB: currently only dentists and physicians are allowed to have family members as shareholders in their professional corporations).