Donald Raymond Keough ( September 4 , 1926 -- February 24 , 2015 ) was an Irish-American businessman and was the Chairman of the Board of Allen & Company Incorporated , a New York investment-banking firm .
Donald R. Keough ( September 4 , 1926 -- February 24 , 2015 ) was an American businessman . He was the Chairman of the Board of Allen & Company Incorporated , a New York investment-banking firm .