David Kenneth Roy Thomson, 3rd Baron Thomson of Fleet (born 12 June 1957), is a Canadian/British hereditary peer and media magnate. Upon the death of his father in 2006, Thomson became the chairman of Thomson Corporation and also inherited his father's British title, Baron Thomson of Fleet. After the acquisition of Reuters in 2008, Thomson became the chairman of the merged entity, Thomson Reuters. , Thomson is the richest person in Canada and 23rd richest in the world, with an estimated net worth of $52.4 billion. Early life and education He was born on 12 June 1957 in Toronto, Ontario, the eldest child of Kenneth Thomson, 2nd Baron Thomson of Fleet, and his wife, Marilyn Lavis. He has a sister named Taylor Thomson, and his brother, Peter Thomson, is a race car driver. In 1978, Thomson received his Bachelor of Arts (subsequently upgraded to an MA (Cantab)) at Selwyn College, Cambridge, where he studied History. As a child, he attended both Upper Canada College and the Hall School. Business career Thomson started his business career as a junior associate at McLeod Young Weir in Toronto. He left the firm to enter the family business, working in a number of positions in companies controlled by the Thomson family. Thomson was manager of The Bay store at Cloverdale Mall in Etobicoke, and president of Zellers. In an effort to develop his independence, Thomson founded the real estate firm Osmington Incorporated, owned and operated outside of the Thomson empire. Osmington acquires and manages commercial real estate assets on behalf of institutional shareholders, such as the Thomson empire. In 2010, Osmington sold its stake in eight retail properties to the Canada Pension Plan for $336 million. Osmington is a major investor in FarmersEdge, a precision agriculture company. Osmington is also a partner in True North Sports and Entertainment, owners of the National Hockey League's Winnipeg Jets and the Canada Life Centre in downtown Winnipeg, Manitoba. Osmington is redeveloping the retail space of Toronto's Union Station. Thomson's investment activities are managed through Toronto hedge fund Morgan Bay Capital. According to a plan devised decades ago by Thomson Corporation founder Roy Thomson, when Kenneth Thomson died (in June 2006), control of the family fortune passed on to David: "David, my grandson, will have to take his part in the running of the Organisation and David's son, too," Roy Thomson wrote in his 1975 autobiography. "With the