South Dakota's most wealthy businessman and philanthropist has died. Billionaire T. Denny Sanford died Saturday at age 90. The well-known banking mogul was known for donating billions to charities and causes in South Dakota and other states across the nation.
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SIOUX FALLS, S.D. (KELO) -- South Dakota’s most well-known billionaire has died. On Saturday morning, Sanford CEO Bill Gassen announced in an email to Sanford employees Thomas Denny Sanford died. Sanford was 90 years old.
Sanford made his fortune in banking and the credit card industry and in 2007 donated $400 million to what was then Sioux Valley Hospital, the first in hundreds of millions in contributions across the city.
SIOUX FALLS, S.D. (KELO) -- Longtime philanthropist Thomas Denny Sanford died Saturday, July 18 at 90 years old. Below is his full obituary. Philanthropist Thomas “Denny” Sanford of Sioux Falls passed away peacefully on July 18, 2026. He was 90 years old.
The Sioux Falls businessman's donations led to the creation of Sanford Health, which through mergers has become the largest rural health-care provider in the country with hospitals, clinics and retirement centers across North and South Dakota, Minnesota and Wisconsin.
SIOUX FALLS, S.D. (KELO) -- T. Denny Sanford died Saturday, July 18th, 2026. He was best known for his investment in the healthcare world. But before founding Sanford Health, he started First PREMIER Bank and PREMIER Bankcard.
South Dakota's most wealthy businessman and philanthropist has died. Billionaire T. Denny Sanford died Saturday at age 90. The well-known banking mogul was known for donating billions to charities and causes in South Dakota and other states across the nation.
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SD billionaire philanthropist Sanford dies | Since Then
