Question about 40% ownership

Hi, quick question, my wife has the opportunity to become part ownership of a company/corporation, my father mentioned that because shes only 40% she wont have any say in anything as shes not 60%, like if her partner wanted to sell the company, her partner can without my wife's consent. This is in Canada. Is there any truth to that? via /r/business https://ift.tt/2R311XM