Today at #ILTACON2026, the largest legal technology conference globally, we launched Thomson, our first proprietary large language model, built in-house, and fully owned and controlled by Thomson Reuters. A few lines from today's announcement that stuck with us: “Thomson proves what’s possible when you build AI on decades of proprietary content and editorial expertise,” said Steve Hasker, CEO of Thomson Reuters. “That’s an advantage only Thomson Reuters has, and it shows in the results: our early evaluations put Thomson on par with the latest frontier models across a range of tasks. We’re putting it to work in CoCounsel Legal, with more capabilities and sovereign AI options to come. This is the bar we intend to keep raising.” This is Fiduciary-Grade AI™ in practice. The standard we set for AI built for professionals who cannot afford to be wrong. Thomson's first deployment is inside Tabular Analysis in CoCounsel Legal — exactly the kind of high-volume, structured document review where a purpose-built model's advantage shows up immediately. CoCounsel Legal remains multi-model by design, applying Thomson where it delivers the clearest advantage and other leading models elsewhere. Read the full announcement and register for our LinkedIn Live taking place on September 15th to learn more. 👇 - ow.ly/nlM350ZEJZZ #ThomsonAI #CoCounsel

Unforgettable moments from Legal Geek 2026: The energy. The conversations. The laughs. The aha moments. The people who make legal tech worth showing up for. And a bit of magic. ✨ Thank you to everyone who connected with us, and to the Legal Geek team for two great days. What’s the one thing you've taken away this year? #LegalGeek

This fall, level up. Synergy 2026 brings legal, government, tax, audit, and corporate professionals together to put AI you can trust to work in the moments that matter. 🗓️ November 16 to 19, 2026 📍 Fontainebleau Las Vegas ow.ly/aVzp5100Fln #TRSynergy2026

Precision alone doesn’t make professional work correct. Today we launched the next generation of CoCounsel Tax, Audit & Accounting. It plans the work, grounds each calculation in the correct authority, and shows its reasoning so you can validate the results for yourself. Available now in the United States: thomsonreuters.com/en/press-…

“A legal team has infinite work.” That’s the number one challenge for in-house counsel, according to Norie Campbell, Chief Legal Officer and Company Secretary at Thomson Reuters, whom we sat down with at #ACCAM26. Her focus: how departments prioritize and do the most with the resources they have, and why she sees the opportunity opening up.

A few of our favorite moments from Legal Geek London 2026. Thank you to everyone who visited Booth 1 and The CoCo's Lounge, caught our sessions, and joined us for ice cream, magic, and good conversation. #LegalGeek

⚽ BELIEVE. Jason Sudeikis, Emmy-winning actor, Comedian, Writer & Producer, and creator/star of Ted Lasso, is coming to Synergy 2026. 📍 Fontainebleau Las Vegas 🗓️ Wednesday, November 18 Register today: ow.ly/nZ4P50ZZmBS

Legal research shouldn’t stop at the border. Thomson Reuters and Otto Schmidt, a leading German legal publisher, are changing that. Mutual customers can now access the Otto Schmidt Legal Data Hub, powered by LDA Legal Data Analytics GmbH, inside the classic version of CoCounsel Legal’s international research workflow. It brings over 120 modules of German law commentary alongside Westlaw and Practical Law Global, with citations from authoritative sources. Plans to extend it to the next generation of CoCounsel Legal are set for early 2027. Otto Schmidt and LDA join a growing list of partners extending CoCounsel Legal across borders, bringing trusted, jurisdiction-specific expertise into the workflow attorneys already use. Learn more: ow.ly/pvvu50ZZm8W

The entire internet is a lot of things. Correct isn't always one of them. CoCounsel pulls from 175 years of Thomson Reuters knowledge instead. Don't risk it. Trust CoCounsel. ow.ly/L1PB50ZZ3gt #TheCoCo

Most tax and compliance technology sit outside the systems where transactions actually happen. That's the gap Thomson Reuters and Oracle have been working to close. Today, Thomson Reuters ONESOURCE indirect tax determination, e-invoicing, and compliance reporting solutions are listed on Oracle Cloud Marketplace and have earned Oracle Validated status for Oracle Fusion Cloud Applications. For customers, that means a single place to find, evaluate, and activate ONESOURCE capabilities designed to work with Oracle Fusion Cloud ERP. Together, the solutions support key parts of the indirect tax lifecycle, from tax determination and e-invoicing to compliance reporting and filing for global requirements. The Marketplace listing builds on the solutions Thomson Reuters and Oracle introduced within Oracle Fusion Cloud ERP in June, making ONESOURCE capabilities easier to find, evaluate, and activate. Read more here: ow.ly/J6vn50ZZ29p

A few of our favorite moments from ACC Annual Meeting 2026 in Boston. Thank you to everyone who visited Booth 511 and The CoCo’s Library, caught our Learning Lab sessions, and joined us at Trillium Brewery for tastings, live comedy and good conversation. #ACCAM26

Real change isn’t one big moment. It’s thousands of small ones. A decision made. A risk reduced. A problem solved. When the pressure is on, you need answers that are clear, confident, and ready to act on. Join changemakers at Synergy 2026 and explore Fiduciary-Grade AI™ from Thomson Reuters, built for the moments that matter. 🗓️ November 16 - 19, 2026 📍 Fontainebleau Las Vegas #TRSynergy2026 #ChosenByChangemakers Register today: ow.ly/QQVa50ZYcRc

The best enterprise AI doesn't have to start from scratch. Alexander Kardos-Nyheim explains how Thomson Reuters evaluates leading open-source reasoning models, then builds the strongest foundation with continuous pre-training on its proprietary data corpus. The result: domain-specific AI designed for the precision high-stakes professional work demands. Learn more about Thomson: ow.ly/GHoO50ZTa22

Legal work happens across many environments. The professional standard should travel with it. Starting October 15, HighQ is available as an MCP plugin within Microsoft 365 Copilot, as a launch partner for Microsoft Copilot for Legal. That means matter context, documents, and team information from HighQ are now accessible directly in Copilot Chat and Cowork, Copilot in Teams, and Word, without switching platforms or rebuilding context. The best integrations do not add a new tool. They make the ones legal professionals already rely on work better together. This is part of how Thomson Reuters is building across the legal AI ecosystem, ensuring that trusted, fiduciary-grade capabilities are present wherever professional work happens.

Sharper research, smarter drafting: September brought CoCounsel Legal even closer to the places where legal teams already keep their work. What’s new from September: → CoCounsel Legal agent now available in Word, with enhanced access to Westlaw, KeyCite, and Practical Law content → Global Research Menu expands global content coverage, with International Legal Research now at 44 jurisdictions → Prompt Library for saving and reusing your best prompts → Up to 10,000 files in a single workspace Read about what’s new & notable in CoCounsel Legal in September: ow.ly/vQpw50ZY2Su

Regulators expect faster responses, and manual reconciliation isn’t going to keep up. CoCounsel now powers ONESOURCE Reconciliations, bringing our Fiduciary-Grade AI™ standard to reconciliations in a real-time compliance world, so teams can move as fast as tax authorities expect, and produce transparent, verifiable outputs. Learn more about ONESOURCE Reconciliations powered by CoCounsel: ow.ly/Js0050ZXWTJ

Ask any lawyer whose work crosses borders what slows them down. The answer is always the same: the research tools stop at the border. Today that changes. The new Multinational Profile brings legal content from more than 100 countries and territories into a single CoCounsel Legal workflow. It’s part of the next generation of CoCounsel Legal, grounded in Westlaw and Practical Law and coming to customers in more than 90 countries and territories throughout 2026. Learn more: ow.ly/wfLu50ZXvFH

What does Fiduciary-Grade AI™ mean for professionals? Steve Hasker explains why lawyers, tax, audit, and accounting professionals need AI built for precision and accuracy, not probabilistic answers they can't stand behind. Learn more about Thomson, our in-house LLM built for professionals: ow.ly/ECfN50ZT9Ob

From 33 contract-request forms to 3. That's what happened when our own legal team became Customer Zero for CoCounsel: new AI-generated playbooks empowered a deal desk, freeing lawyers for more strategic work. Read the full story: ow.ly/tviu50ZXjen

Westlaw Deep Research is coming to Archie AI, Smokeball’s matter assistant. Thomson Reuters and Smokeball partnered earlier this year to bring Smokeball’s practice management tools together with CoCounsel Legal, and this is the next step. Westlaw Deep Research, Thomson Reuters’ agentic legal research tool, will be integrated within Archie AI later this month. Ask Archie a question and get a structured report built from multi-step research across Westlaw. Every step is visible, every citation links back to Westlaw, and the work stays on the matter for future reference. Research that’s sourced and reasoned, grounded in Fiduciary-Grade AI™, with more to come in 2027. Learn more: ow.ly/bWhE50ZXcmy