Thomson Reuters

Thomson Reuters is a Canadian information services and software group headquartered in Toronto, Ontario, formed in 2008 when The Thomson Corporation acquired the London-based Reuters Group. It is publicly traded on the Toronto and New York stock exchanges under the ticker TRI, and is majority controlled by The Woodbridge Company, the Thomson family holding vehicle.

The Thomson side traces to Roy Thomson's Canadian newspaper interests in the 1930s, while Reuters was founded in London in 1851, and the merged group has since sold off most print and media assets to concentrate on professional software. In legal it built the Westlaw and Practical Law franchises, bought Serengeti Law in 2010 to create Legal Tracker, acquired Casetext in 2023 to seed CoCounsel, and added the deal analytics platform Noetica in February 2026.

Thomson Reuters at a glance:

• Founded: Formed in 2008 by the merger of The Thomson Corporation, itself dating to the 1930s, with the Reuters news agency founded in London in 1851.
• Headquarters: Toronto, Ontario, Canada, with major legal operations in Eagan, Minnesota and offices across the United States, Europe and Asia.
• Ownership: Publicly traded on the Toronto and New York stock exchanges under the ticker TRI, with The Woodbridge Company holding roughly 70 percent.
• Legal Technology Portfolio: Sells CoCounsel and Legal Tracker into corporate legal, alongside Westlaw, Practical Law, HighQ, Contract Express and the ONESOURCE tax suite.
• Market Focus: Law firms of every size, corporate legal and tax departments and government agencies worldwide, with the largest revenue base in North America.

What legal teams should know: Thomson Reuters is the incumbent for legal research and outside counsel spend management, which makes it a low-risk procurement choice but rarely the cheapest. Buyers should press on how CoCounsel licensing interacts with existing Westlaw and Legal Tracker contracts, since the group increasingly bundles AI capability into wider enterprise agreements.