buyout (acquisition of a controlling interest)

enterprise / undertaking / corporation / business

large company, conglomerate

(business) startup (company) / (business) starting up (the process of founding (a business)) / (computing, rare) starting up (launching)

(business) to start up, to found (a business); to spin off / (computing, rare) to start up (launch)

small-to-medium-sized enterprises, smaller companies

entrepreneur

"black company"; an exploitative firm that abuses employees or offers poor working conditions

corporation that takes care of all aspects of a product except for physical manufacturing

(dated) "company warrior": businessman who puts his all into work