Thon bought his first building in 1951 and opened his first restaurant in 1966. Besides his hotel and real estate investments, in 1992, Thon acquired Unger Fabrikker AS. Unger Fabrikker AS is a Fredrikstad based chemical manufacturer with a focus of anionic surfactants. In 2007, Thon was listed with a fortune of NOK 20.8 billion, which made him Norway's 2nd richest person. Thon's authorized biography,
Olav Thon: Billionaire in a Parka, was written by
Hallgrim Berg, a Norwegian politician and a
folk musician; a translated version was published in
English in October 2009.
Trust In an article in the Norwegian newspaper
Dagens Næringsliv on 10 September 2008, Thon's solicitor,
John Christian Elden, announced that Thon intended to give away his entire fortune through the establishment of an independent
foundation that focuses on the medical sciences. Therefore, later, in February 2014, his personal assets were estimated around US$1 billion. Thon had no heirs at the time of his death. == Personal life ==