18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity Net Worth 2026
Some billionaires have announced their intent to eschew massive inheritances for their children, but it is still possible for very young heirs and...
💼 Entrepreneur / Business Mogul · Updated: October 03, 2026 · 3 min read · FamsWorthHQ Financial Desk
18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity — Estimated Net Worth & Financial Dossier
Executive Summary:
Some billionaires have announced their intent to eschew massive inheritances for their children, but it is still possible for very young heirs and heiress to become essentially overnight billionaires after the will gets read. The recent death of Kim Jung-ju, billionaire founder of the South Korean gaming company Nexon, has created a shake-up in the world of billionaire stats. After inheriting stakes in her father's holding company NXC, 18-year-old Kim Jung-youn is now the youngest billionaire in the world.
Even after an inheritance tax bill that reported totaled $1.5 billion, both Jung-youn and her older sister Kim Jung-min are worth about $1 billion each. The Investor reports that the NXC shares don't come with any responsibility for controlling the company, as the reins will instead be handed to older and more experienced employees as per the older Kim's will.
Verified Wealth Dossier
18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity — Financial & Wealth Report PDF
Download verified earnings portfolio, business ventures & asset breakdown.
💰 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity Financial Profile OverviewVerified Benchmark
Estimated Net Worth
$140.1 Billion
Annual Salary / Earnings
$11.9 Billion / year
Monthly Income
~$992.4 Million / month
Primary Wealth Sources
Business Ownership, Investments, Real Estate, Equity Holdings
Known Assets & Portfolio
Real Estate, Luxury Vehicles, Business Investments
Nationality / Origin
American
Industry / Category
💼 Entrepreneur / Business Mogul
Data Last Updated
November 2026
Biography & Early Wealth Journey
Seung-il Ryu/NurPhoto via Getty Images
Not much is known publicly about the youngest Kim sister, besides a birthdate in 2004, allowing her to edge out the youth of 20-year-old Kevin David Lehmann, who previously held the title of world's youngest billionaire after getting a stake in Drogerie Markt, the German drugstore chain founded by his father, Guenther Lehmann.
Yoo Jung-hyun, Jung-ju's widow and the co-founder of Nexon, has also launched into the billionaire stratosphere, with a net worth of $3 billion after inheriting additional shares in the company from her late husband.
Primary Income Streams & Multi-Million Contracts
Kim Jung-ju founded Nexon in 1994, eventually building it into the largest gaming brand in Korea with games like the popular "Maplestory" in its portfolio. Before his death, he was also known for his philanthropic projects, including establishing the first-ever pediatric rehabilitation hospital in Korea as well as the first computer museum in all of Asia. His Nexon Foundation also funds an "annual hackathon," and a network of lending libraries for impoverished children in South Korea. He was the third-richest person in Korea at the time of his death at age 54.
What is 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity's net worth in 2026?
As of 2026, 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity's estimated net worth is $140.1 Billion.
How does 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity make money?
18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity generates income primarily through Business Ownership, Investments, Real Estate, Equity Holdings.
What are 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity's biggest assets?
They maintain a diverse portfolio including Real Estate, Luxury Vehicles, and Business Investments.
How much does 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity earn per year?
18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity brings in approximately $11.9 Billion in annual earnings.
Is 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity a millionaire or billionaire?
Yes, 18-year-old South Korean Heiress Is Now The Youngest Billionaire In The World | Celebrity is a billionaire.
Financial Valuation Disclaimer: All net worth figures, annual salaries, and asset estimates presented on FamsWorthHQ are formulated using publicly accessible data, corporate filings, industry contract disclosures, and proprietary statistical modeling. Unless explicitly designated, figures represent estimated calculations and should be referenced for informational and comparative entertainment purposes.
