Walter J. Hinneberg is a shipbroker [1] and real estate investor from Hamburg, Germany. In 1958 he founded the Walter J. Hinneberg Company in Hamburg. [2] [3] Hinneberg owns the land under 40 Wall Street in New York City. [4] [5] Donald Trump purchased the building from the Kinson Company and renegotiated the land lease with Hinneberg in 1995. [6]