Thomas Milton Duff (born December 31, 1956)[1] is an American billionaire businessman and philanthropist.
Alongside his brother, James Duff, he co-owns Southern Tire Mart, the nation's largest truck tire dealer and retread manufacturer, and Duff Capital Investors, the largest privately owned business in Mississippi.
In addition to his business ventures, Duff has been involved in public service, serving on the Mississippi Institutions of Higher Learning Board of Trustees and supporting Republican political campaigns.
[5] In 1979, Duff graduated with a bachelor's degree in business administration from the University of Southern Mississippi.
Thomas and his brother James both worked there as teenagers and assumed control of the struggling company in 1983, later selling it in 1998 to Tire Distribution Systems.
[9] Duff was the subject of a murder plot in 2016 to extort money; 3 individuals were arrested.