parent adj. designating a corporation in relation to a subsidiary that it owns and controls (Webster New World Dictionary)
parent: (often used as an adjective) an organization that produces and owns or controls smaller organizations of the same type: ตัวอย่าง: a parent bank and its subsidiaries * the parent company
The Shell group has two parent companies each with its own board, one in the U.K. and one in the Netherlands, a structure that dates from 1907 when Shell Transport & Trading Co. merged with Royal Dutch Petroleum. (Bloomberg News)
The parent company of Canadian chocolatier Laura Secord has sold its U.S. business to a fast-growing chocolate manufacturer with operations on both sides of the border. (The Toronto Star)