As many as 14 major companies, including affiliates of big name conglomerates like Hyundai and Samsung, will be brought under close supervision by creditor banks this year as the financial regulator enforces tighter corporate debt overhaul standards, industry sources said Monday. The newly added companies include Hyundai Group, Halla Group, Hankook Tire Co., STX Offshore & Shipbuilding Co. and Hyundai Development Co., according to the sources.