NBC News — The world's oldest billionaire has died at the age of 101. Walter Haefner died on June 19th, but his death was only recently announced. Born in Zurich, Haefner made his fortune importing cars to Switzerland then became the largest shareholder of American software maker CA Inc. He also enjoyed breeding and riding thoroughbreds.

Forbes magazine estimated his fortune at $4.3 billion. That made him the third richest Swiss and the oldest person with a net worth exceeding $1 billion . With $2.5 billion, 97 year old David Rockefellar, banker and grandson of Standard Oil founder John D. Rockefellar, is now the world's oldest billionaire.