Sir Tom, from New Cumnock in East Ayrshire, started in business selling trainers from the back of a van but eventually built a property and equity business once valued at more than £1bn.
He continues to invest in companies, as well as running his charity, the Hunter Foundation, which he and his wife Marion established in 1998.
It has previously donated money to STV Children's Appeal, the University of Strathclyde, Kiltwalk and Comic Relief.
Last month, Mr Hunter was revealed as the private citizen who paid for the plane flying Alex Salmond's body home from North Macedonia.
It was understood the flight was paid for by his own funds, not through his foundation.