T. Denny Sanford, South Dakota's most significant philanthropist and banking entrepreneur, has died at the age of 90.

T. Denny Sanford, the founder and chairman of First PREMIER Bank and PREMIER Bankcard, died on Saturday at the age of 90. A self-made billionaire, Sanford is recognized as the most significant philanthropist in South Dakota history, having donated well over $1 billion to various causes. Sanford built his fortune in the banking and subprime credit card industries. His philanthropic legacy is defined by transformational gifts to healthcare, education, and children's causes. His $400 million gift to Sioux Valley Hospital led to the creation of Sanford Health, which will be the primary beneficiary of his estate. State leaders and business associates praised his impact on the region. Former Sioux Falls mayor Paul TenHaken credited Sanford as the primary catalyst for the city's current trajectory, while U.S. Senator Mike Rounds noted his commitment to helping the next generation of South Dakotans prosper. Sanford was known for his "Giving Pledge" commitment to "die broke," ensuring his wealth served the community.

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