Terms for subject Makarov containing business concern

English	Russian
don't concern yourself with matters that are not your business	не суй свой нос не в свои дела
don't meddle in matters that don't concern you, mind your own business	не вмешивайся не в своё дело
have a concern in a business	быть участником в каком-либо предприятии
have a concern in a business	быть партнёром в фирме
have a concern in a business	быть пайщиком предприятия
have a concern in a business	быть акционером предприятия