Active house
Thomson family
Thomson Reuters / Woodbridge · Canada · founded 1934
Canada's wealthiest family, controlling Thomson Reuters through the Woodbridge holding company.
Family fortune
$69B
Bloomberg Family Index, as of 2025-12-31
Generations
4
Documented members
4
Industries
Media, Information services
Founders, principals and heirs
Roy Thomson
Founder · generation 1 · 1894–1976
Built a newspaper and broadcasting chain from Ontario.
Kenneth Thomson
Principal · generation 2 · 1923–2006
Second Baron Thomson of Fleet.
David Thomson
Principal · generation 3 · 1957–
Chairman of Thomson Reuters; third Baron Thomson of Fleet.
Taylor Thomson
Heir · generation 3 · 1959–
Woodbridge shareholder.
Legacy
A newspaper chain was converted into a professional-information business ahead of print's decline.
Evidentiary standard
Family fortunes are only recorded where a named wealth desk publishes a standing family-level estimate; the source and valuation date are shown with the figure. Houses whose assets are held through charitable trusts, foundations, or sovereign vehicles carry no figure, because no verifiable personal total exists. Lineage entries are limited to publicly documented family members.