controlling interestnoun [ C, usually singular ]
ukusFINANCE, STOCK MARKETif someone has a controlling interest in a company, they own enough shares in it to control its management:
have/own/hold a controlling interest (in sth) The group holds a 52% controlling interest in the new telecommunications company.
buy/sell a controlling interest Last year the former CEO sold his controlling interest for more than one billion dollars.