Richest Person in South Korea: Seo Jung-Jin first officially became a billionaire in 2012. By June 2021, his $13 billion net worth made him the richest person in South Korea. He is South Korea’s first self-made billionaire to be the richest person in the country AND the first non-Samsung heir to hold the title in decades. In 2020 his company Celltrion generated $1.6 billion in revenue and $440 million in profits, thanks in large part to a Covid-19 antibody treatment drug. Seo Jung-Jin retired from Celltrion in March 2021, appointing his eldest son Jin-seok Chairman. Another son, Joon-serk chairs the company’s marketing arm, Celltrion Healthcare.