D iona Teh Li Shian is a Malaysian heiress whose fortune is derived from her family's stake in Public Bank, one of Malaysia's largest and most profitable banking groups. She is one of the four children of the late Teh Hong Piow, the legendary and highly respected founder of Public Bank. Her father was a self-made titan of Malaysian finance who founded the bank in 1966 and led it for over five decades, building it into a banking powerhouse.

Upon her father's death in 2022, his massive stake in the publicly traded Public Bank was passed on to his four children: Diona and her three sisters. While none of the children are involved in the day-to-day executive management of the bank, which is run by a professional team, their inherited ownership stake makes them some of the wealthiest people in Malaysia. Diona's wealth is a direct legacy of her father's incredible life's work in building one of Southeast Asia's most successful financial institutions.