Baron Guy François Edouard Marie Ullens de Schooten Whettnall (born 31 January 1935) is a Belgian art collector, philanthropist, and former businessperson.

[2][3] The family moved to Oslo, Norway shortly after Guy was born, where Jean Ullens took up the diplomatic position of acting Minister for Belgium.

[7] He started[citation needed] Eurocan in Mechelen, Belgium, a company that specialized in the manufacture of metal packagings for preserved foods and beverages.

[22] Guy Ullens told Forbes in 2012, that the initial US$224 million direct investment in Weight Watchers had returned US$5.2 billion to Artal Group.

[25] One of the first purposes of the Foundation was to sponsor and organize exhibitions of Chinese art, and to lend pieces to museums and cultural centres around the world.

[37][38] In order to establish UCCA, Ullens sold off his collection of J. M. W. Turner watercolour paintings for £10.76 million at a Sotheby's auction in London in July 2007.

[41][42] In a Sotheby's Hong Kong auction in April 2011,[43] exclusively featuring 106 works from the Ullens Collection,[44] Zhang Xiaogang's 1988 triptych oil work Forever Lasting Love, of half-naked figures in an arid landscape suffused with mystical symbols, sold for HK$79 million (US$10.1 million), a record auction price for a contemporary artwork from China, in Hong Kong.

Ullens is a yachtsman, and owns the 170 ft (51.77 m) long flybridge aluminium sloop Red Dragon II with interior design by French architect Jean-Michel Wilmotte.