Tan Yu Yeh co-founded Mr. D.I.Y, a home improvement retail chain in 2005 with his brother Tan Yu Wei, evolving it into a vast one-stop shop spanning over 2,000 stores across Asia. Their main market listing on Bursa Malaysia in October 2020 was one of the largest IPOs that year, with a market capitalisation of RM10 billion. The company has also branched out into other offerings, like Mr Dollar and Mr Toy—a dollar store and toy store respectively.

The company was recently recognised as “Company of the Year” at the Sustainability & CSR Malaysia Awards 2023 for the largest reach-outs for community, environmental, and workplace initiatives.

Prior to founding Mr D.I.Y, Tan worked as an engineer and a remisier. Beyond his business ventures, he is renowned for his philanthropic endeavours, generously supporting various charitable organisations and causes. In 2020, he donated RM10 million to the National Disaster Management Agency in the fight against the COVID-19 pandemic.

For the last three consecutive years, Mr D.I.Y. has also been garnering awards as the winning retailer in the home-improvement category at the World Branding Awards. In addition, it won the Retail Market Leadership Award at the Frost & Sullivan Best Practices Awards in 2020. That same year, the Tan brothers publicly listed Mr D.I.Y. on Bursa Malaysia, which turned them into billionaires.