Early Life
James Ernest Duff was born in 1961 in Columbia, Mississippi. He was raised in Columbia, where his father, Ernest Duff, was a lawyer and businessman. James has three siblings: Thomas, Stephen, and Jane. Duff graduated from Columbia Academy and studied business at Utah Valley University.
Rise to Success
In 1973, James's father, Ernest Duff, founded Southern Tire Mart. James and his brother Thomas took over the struggling company in 1983. They later sold the company in 1998 to Tire Distribution Systems. In 2003, they purchased the company back for $15 million and rebranded it as Southern Tire Mart. By 2025, Southern Tire Mart's revenues exceeded $4 billion, making it the nation's largest truck tire dealer and retread manufacturer. James and Thomas co-founded Duff Capital Investors, a holding company with revenues of $6 billion. Duff Capital Investors is the largest privately owned business in Mississippi.
Key Business Strategies
James Duff's success stems from strategic acquisitions, disciplined operations, and a focus on customer service. The Duff brothers expanded Southern Tire Mart, making it an industry powerhouse. Beyond Southern Tire Mart, Duff Capital Investors has a diversified portfolio spanning transportation, construction, hospitality, and agriculture.
Philanthropy
James Duff is actively involved in philanthropy. He and his brother have donated tens of millions to institutions such as the University of Southern Mississippi (USM), the University of Mississippi (Ole Miss), and Mississippi State University. Notable contributions include a $30 million planned gift to USM in 2020 for scholarships and $26 million to Ole Miss for a STEM facility. They also support athletics and veteran initiatives.
