Daniel Keith Ludwig (June 24, 1897, South Haven, Michigan " August 27, 1992) was a US shipping magnate and billionaire. Even though he was one of the wealthiest men of his day, with operations spanning 23 countries, his name was little known. Throughout his business life, he maintained a low profile and ceased speaking to the press in the 1950s.
Ludwig has the distinction of being #1 on the first Forbes 400 Richest Americans list published in 1982.