Mr. Stupski served as Schwab's president and chief operating officer from 1981 to 1992 and, after suffering a heart attack, as vice chairman from 1992 to 1997. He also played an integral role in Schwab's sale to Bank of America, its buyback from the bank and its subsequent public offering.
He retired in 1997 to devote his time to philanthropy, having established the Stupski Foundation the previous year with his wife, Joyce. The foundation, which closed in 2012 because of Mr. Stupski's failing health, was dedicated to improving education across the country.
Art Kern, who was treated for prostate cancer in 1996, and Mr. Stupski, who was diagnosed in 2003, both served as board members of the Prostate Cancer Foundation, a nonprofit in Santa Monica that raises money for research.
Born in Houston in 1945, Mr. Stupski was the oldest of five sons. He was raised in Wallingford, Conn., and Jacksonville, Fla. A scholar and an athlete, Mr. Stupski played football at Princeton University before attending Yale Law School. In 1968, he enlisted as an officer in the U.S. Navy and served in Vietnam.
Mr. Stupski started his career working for the Bradford National Corp. in New York City in mergers and acquisitions. He moved to the Bay Area in 1978 to lead the company's West Coast office before Charles Schwab recruited him.
Mr. Stupski served as a lifetime board member of Teach for America and on the boards of the Glide Foundation, the San Francisco Chamber of Commerce and other organizations.
In addition to his daughter Maria Brankman and Joyce Stupski, his wife of 22 years, Mr. Stupski is survived four younger brothers.