Thomson Reuters shares rally after CoCounsel AI tool draws 1 million users

The Thomson Reuters logo is displayed on the company's building in Times Square, New York City, U.S., August 6, 2025. REUTERS/Jeenah Moon

Feb 24 (Reuters) - Thomson Reuters shares ⁠jumped more than 11% on Tuesday after the technology and content ⁠firm said its artificial intelligence-powered assistant for businesses, CoCounsel, has drawn one ‌million users, easing fears of disruption by competing AI tools.

The stock posted its biggest percentage gain since 2009. The jump also followed Anthropic's announcement on Tuesday that companies including Thomson Reuters were ​using its AI technology for their products.