Ma is the chairman and the largest shareholder of Shenzhou International Group, a knitwear and textile manufacturer that supplies leading clothiers including Uniqlo and Adidas. The Ningbo, China-based manufacturer is publicly traded, employs more than 101,000 people and had revenue of 28.7 billion yuan ($4 billion) in 2024.
The majority of Ma's fortune is derived from publicly traded Shenzhou International Group. The Ningbo, China-based textile manufacturer employs more than 101,000 people and had revenue of 28.7 billion yuan ($4 billion) in 2024.
He controls 36% of the business through holding company Keep Glory, according to its June 2025 filing. His stake includes shares held by his father that are credited to the billionaire to reflect his control of the company and status as chairman.
The value of his cash investments is based on an analysis of these proceeds, as well as taxes and market performance.
Kenji Chan, a spokesperson for the company, didn't respond to a request for comment on the net worth calculation.
Ma Jianrong was born in China's eastern coast in 1965. He started his career as a factory worker at textile plants before joining Ningbo Shenzhou Knitting, the predecessor of Shenzhou International, in 1989.
His father, Ma Baoxing, was the then chairman of Shenzhou. At age 33, the junior Ma replaced his father as chairman and developed the business into the largest vertically-integrated knitwear manufacturer in China.
In 2000, Ma together with his father and brother-in-law, decided to acquire the company after serving as key managers for a decade. Five years later, Shenzhou became publicly traded in Hong Kong. Shenzhou produces sports wear, casual wear and lingerie. It's a key supplier for brands including Uniqlo, Adidas, Nike and Puma.
Ma and his family live in the city of Ningbo, where Shenzhou is based.