Kim Jung Ju

Kim Jung-ju founded the company.

COURTESY OF NEXON

K im Jung-youn, the teenage daughter of the late Kim Jung-ju, the founder ofNexon who died in February at the age of 54, is the world's youngest billionaire.

According to a regulatory filing earlier this month, Jung-youn and her older sister, Jung-min, had a stake in their father's company. The biggest shareholder inNexon is NXC. The sisters have a stake in the company that is worth over $2 billion. South Korea has one of the highest inheritance taxes in the world and Jung-youn and Jung-min have net worths of $1 billion each.

The wife of Jung-ju had a stake in the company. He helped startNexon in 1994 and still holds a 34% stake in the company. She made her debut on the Korea's 50 richest people with a net worth of $3 billion.

There is not a lot of information about Jung-ju's family. Both Jung-min and Jung-youn were born in 2002. Jung-youn is the youngest billionaire in the world. Kevin David Lehmann was the previous holder of the distinction. When he was 14, his father transferred a stake in German drugstore chain drogerie markt to his son, but it was under a Trusteeship until his 18th birthday.

Jung-ju was very media shy. There is a resort island off the coast of the Korean peninsula. He retired from management in 2006 to focus on philanthropy. Forbes Asia named Jung-ju a hero of philanthropy last year for his donations to children's hospitals.

Jung-ju was the third richest person in South Korea with a net worth of $10.9 billion.

Jane Ho helped with the project.

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