Exhibit 99.1 Thomson Reuters Reports Third-Quarter 2025 Results TORONTO, November 4, 2025 - Thomson Reuters (TSX/Nasdaq: TRI) today reported results for the third quarter ended September 30, 2025: "Our third-quarter results reflect continued momentum and the ongoing execution of our AI-driven innovation strategy," said Steve Hasker, President and CEO of Thomson Reuters. "The growth in organic revenue highlights the impact of our agentic AI solutions like CoCounsel Legal and CoCounsel for tax, audit and acco ...