T an Yu Yeh is the founder of Mr. D.I.Y. Group, Malaysia's largest home improvement retailer. He started the business in 2005 with a single hardware store in Kuala Lumpur, aiming to provide affordable household goods. Under his leadership, the brand expanded rapidly across Southeast Asia, operating thousands of stores in Malaysia, Thailand, Indonesia, and beyond. The stores are known for their wide variety of products, ranging from hardware to toys and stationery.

The company's massive IPO on the Bursa Malaysia in 2020 was one of the country's largest listings in years, propelling Tan and his brother, Tan Yu Wei, into the billionaire ranks. Tan holds a degree in physics and worked as an engineer and stockbroker before venturing into retail. His business model focuses on high volume and low margins, catering to the mass market's daily needs.