Chung is the chairman of Hyundai Motor Group, South Korea's biggest car maker. The Seoul-based company is the third-largest largest automaker in the world and its Hyundai Motor unit generated revenue of $131 billion in 2025. Chung took over the chairmanship from his father Chung Mong-koo in 2020.
Chung's biggest asset is his 20% stake in Hyundai Glovis, a logistics unit of his family's Hyundai Motor Group, the world's third-largest automaker. He also owns 2.7% of the Seoul-based conglomerate's flagship unit Hyundai Motor, which generated revenue of $131 billion in 2025.
His other public holdings include a 1.8% stake in auto manufacturer Kia Motors, a 2% stake in car part maker Hyundai Wia, and a 2% stake in marketing and communications service provider Innocean Worldwide, according to their 2025 annual reports. He also holds a 7.3% stake in Hyundai AutoEver, an IT service provider that went public in March 2019, according to its 2025 annual report.
The billionaire owns an 11.7% stake in closely held Hyundai Engineering, according to the company's 2025 third-quarter report. The company is currently unlisted. His stake is worth $208 million based on a calculation using prices from 38 Communication, a website that keeps track of unlisted Korean stocks.
The value of his cash and other investable assets is based on an analysis of dividends, insider transactions, taxes and market performance.
Hyundai Motor's spokeswoman Cha Seon-jin declined to comment on the valuation.
Chung is the grandson of Chung Ju Yung, a Seoul rice store owner who started Hyundai after WWII, benefiting from the reconstruction of Korea and diversifying into car and shipbuilding, steelmaking and construction.
His father, Chung Mong Koo, took over Hyundai Motor in 1998, buying automaker Kia in a bankruptcy auction the same year. Chung Eui-Sun was made chief executive officer of Kia in 2005, stepping down three years later after profit dropped 98 percent during the course of his tenure. He was named vice chairman at Hyundai Motor in 2009 and joined the board a year later.
His father was convicted of embezzling $110.5 million from Hyundai Motor, Kia and other affiliates, and of using more than two thirds of the money as a political slush fund in 2007. He received a suspended three-year prison sentence and was pardoned by President Lee Myung Bak in August 2008. Chung Eui-Sun wasn't indicted.
Few people can assess how the billionaire will perform when he becomes chairman, because his father keeps him on a tight leash. He started to take the stage giving English-language speeches at auto shows in the past few years. He still refers to his father as chairman, according to a person who knows the billionaire and asked not to be identified because the matter is private.