Koo Bon-Sik was born in South Korea, is HeesungHeesung. Koo Bon-Sik runs LG affiliate Heesung Electronics with his brother Koo Bon-Neung (No. 31) and he owns 29%, but his stake in LG is worth more. He is the youngest of the four Koo brothers. Heesung is LG's largest supplier of backlights to illuminate LCD displays. His father is LG's honorary chairman, Koo Ja-Kyung. His grandfather is LG Group founder Koo In-Hwoi.