холдинг(A company that owns enough voting stock in another company to control management and operations by influencing or electing its board of directors)
холдинг(A holding company is a company or firm that owns other companies' outstanding stock. The term usually refers to a company which does not produce goods or services itself; rather, its purpose is to own shares of other companies. wiki Alexander Demidov)
компания-учредитель(компания, владеющая контрольными пакетами акций других компаний); компания-держатель(компания, владеющая контрольными пакетами акций других компаний)