Thomson Reuters Corp shares declined 3.2% to $145.42 on Tuesday, extending losses from the session’s $147.88 opening price to a day low of $144.50.
The retreat followed the company’s launch of Thomson 1.0, a proprietary large language model developed at a reported cost of $40 million in talent and compute infrastructure. The decline occurred as U.S. equity benchmarks advanced modestly, with the S&P 500 up 0.3% and the Nasdaq gaining 0.6%.
Thomson 1.0 is positioned as an enterprise-grade AI platform designed to enhance legal research and workflow automation, complementing existing offerings such as HighQ, LexisNexis, Westlaw, Practical Law, and Checkpoint. The move comes amid broader industry focus on generative AI integration within professional services, though investor response suggests caution over near-term monetization and adoption timelines.
The company’s shares have retraced from earlier gains despite the broader market’s upward drift, indicating sector-specific headwinds tied to the AI platform rollout and potential competitive pressures from platforms such as Google’s newly introduced Gemini Enterprise for Legal.
