One Million Professionals Turn to CoCounsel as Thomson Reuters Scales AI for Regulated Industries

Rhea-AI Summary

Thomson Reuters (TSX/Nasdaq: TRI) announced that one million professionals now use CoCounsel across 107 countries and territories, signaling a shift from AI pilots to production systems in regulated industries. CoCounsel integrates licensed content, expert validation and data-protection controls while partnering with multiple foundation models and proprietary technology.

Thomson Reuters says CoCounsel powers legal, tax, audit and compliance workflows, with a next-generation CoCounsel Legal beta and additional 2026 enhancements planned for CoCounsel Tax and ONESOURCE+.

Positive

• One million users of CoCounsel across 107 countries and territories
• 4,500 subject matter experts contributing to validation and continuous refinement
• Multi-model architecture combining Anthropic, OpenAI, Google models and proprietary AI
• Integration with Westlaw and Practical Law for authority retrieval in legal workflows
• Next-gen CoCounsel Legal beta announced with conversational task execution planned

Negative

• None.

Market Reaction – TRI

+7.31% $86.77

15m delay 30 alerts

+7.31% Since News

$86.77 Last Price

$80.59 $90.79 Day Range

+$2.63B Valuation Impact

$38.61B Market Cap

0.7x Rel. Volume

Following this news, TRI has gained 7.31%, reflecting a notable positive market reaction. Our momentum scanner has triggered 30 alerts so far, indicating elevated trading interest and price volatility. The stock is currently trading at $86.77. This price movement has added approximately $2.63B to the company's valuation.

Data tracked by StockTitan Argus (15 min delayed). Upgrade to Silver for real-time data.

Key Figures

CoCounsel users: 1,000,000 professionals Global reach: 107 countries and territories Content history: 175 years +1 more

4 metrics

CoCounsel users 1,000,000 professionals Total professionals using CoCounsel across regulated industries

Global reach 107 countries and territories Geographic footprint of CoCounsel adoption

Content history 175 years Years of licensed content used to train and ground outputs

Subject matter experts More than 4,500 experts Experts contributing to validation and refinement of CoCounsel

Market Reality Check

Price: $80.86 Vol: Volume 3,602,493 is 8% ab...

normal vol

$80.86 Last Close

Volume Volume 3,602,493 is 8% above the 20-day average of 3,343,490, indicating slightly elevated trading ahead of this AI milestone news. normal

Technical Shares at $80.86 trade 62.98% below the 52-week high of $218.42 and remain below the 200-day MA of $159.30, reflecting a weak longer-term trend.

Peers on Argus

TRI was down 2.81% while key peers like RELX, CTAS, CPRT, RBA, and GPN also trad...

1 Down

TRI was down 2.81% while key peers like RELX, CTAS, CPRT, RBA, and GPN also traded lower, but momentum scanner data flagged only one peer in downside momentum and overall sector move is marked as stock-specific rather than a broad Industrials rotation.

Previous AI Reports

5 past events · Latest: Jan 13 (Positive)

Same Type Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Jan 13	AI alliance launch	Positive	-1.9%	Launch of Trust in AI Alliance with major cloud and AI partners.
Nov 05	AI product expansion	Positive	-1.6%	Expanded agentic AI solutions across tax, audit, legal and compliance.
Nov 04	AI integration deal	Positive	-5.9%	Joined NetDocuments ndConnect to integrate CoCounsel Legal securely.
Aug 05	CoCounsel Legal launch	Positive	-2.0%	Launch of CoCounsel Legal agentic AI platform for legal research.
Jun 26	AI adoption report	Positive	+0.8%	Release of Future of Professionals report on AI-driven revenue growth.

Pattern Detected

AI-related announcements for TRI have generally been positive in tone but followed by modest share price declines, with 4 of 5 prior AI news events showing negative next-day moves.

Recent Company History

Over recent months, Thomson Reuters has repeatedly highlighted its AI strategy, from launching CoCounsel Legal and integration with NetDocuments to forming the Trust in AI Alliance and publishing its Future of Professionals report. These AI updates emphasized trustworthy, profession-specific systems for legal, tax, and compliance work and showed growing ecosystem partnerships. Despite the constructive narrative, AI-tagged announcements have often been met with share price softness, suggesting enthusiasm in communications has not consistently translated into positive short-term trading reactions.

Historical Comparison

-2.1% avg move · Past AI-tagged TRI announcements averaged a -2.1% move, as investors often reacted cautiously to oth...

AI

-2.1%

Average Historical Move AI

Past AI-tagged TRI announcements averaged a -2.1% move, as investors often reacted cautiously to otherwise constructive AI strategy and product updates.

AI news shows a progression from CoCounsel Legal launch and ecosystem integrations to alliances on trustworthy AI and large-scale adoption of CoCounsel across professional markets.

Market Pulse Summary

The stock is up +7.3% following this news. A strong positive reaction aligns with management’s empha...

Analysis

The stock is up +7.3% following this news. A strong positive reaction aligns with management’s emphasis on CoCounsel as a scaled, professional‑grade AI layer, now used by 1,000,000 professionals in 107 countries and territories. Historically, however, TRI’s AI news has averaged a -2.1% move, so sustained strength would contrast with prior cautious trading around similar updates. Investors would likely watch how this adoption milestone translates into revenue and margin trends over subsequent earnings reports.

Key Terms

jurisdiction-specific rules, workflow integration, multi-model architecture, foundation models, +1 more

5 terms

jurisdiction-specific rules regulatory

"These systems need to retrieve authoritative sources, verify citations, and apply jurisdiction-specific rules."

Laws, regulations and official procedures that apply only within a particular country, state or region and can change how businesses operate there. For investors, these rules matter because they affect costs, allowed activities, reporting requirements and legal risk—think of them like different neighborhood bylaws that can make running the same business easier, harder or more expensive depending on the location.

workflow integration technical

"Workflow integration. CoCounsel operates inside research, drafting, and compliance platforms"

Connecting a company's software, tools and procedures so tasks and information move automatically from one step to the next; think of it like a conveyor belt that hands a workpiece from station to station without manual carrying. For investors, workflow integration matters because it can cut operating costs, reduce mistakes, speed product or service delivery and make a business easier to scale—factors that directly affect profitability, cash flow and competitive strength.

multi-model architecture technical

"Multi-model architecture with governance. Thomson Reuters works with leading frontier models"

A multi-model architecture is a system that runs several separate predictive or decision-making models together, either in sequence or in parallel, so each model contributes its strengths to solve a task. Think of it like a team of specialists where one expert checks numbers, another interprets text, and a third flags unusual patterns — combining their answers usually makes forecasts or automated decisions more accurate and robust. Investors care because this approach can reduce mistakes, speed product development, and make a company's technology more competitive and harder for rivals to copy.

foundation models technical

"combining foundation models, proprietary AI engineering, proprietary content, and domain expertise"

Foundation models are very large artificial intelligence systems trained on broad, general data so they can be quickly adapted to many different tasks, like a powerful, general-purpose engine or a Swiss Army knife for software. They matter to investors because they can lower costs and speed innovation across industries, create new products or revenue streams, and change competitive dynamics, while also introducing operational and regulatory risks that can affect a company’s financial outlook.

agentic AI technical

"next generation of CoCounsel Legal, entering beta soon, is designed around conversational task execution."

Agentic AI refers to computer systems that can make their own decisions and take actions without needing someone to tell them what to do each time. It's like giving a robot a degree of independence to solve problems or achieve goals on its own, which matters because it could change how we work and interact with technology in everyday life.

AI-generated analysis. Not financial advice.

Milestone Signals Shift from AI Pilots to Production Systems and Previews the Next Generation of CoCounsel Legal

TORONTO, Feb. 24, 2026 /PRNewswire/ -- Thomson Reuters (TSX/Nasdaq: TRI), a global content and technology company, today announced one million professionals have chosen CoCounsel, the company's professional-grade AI technology, across 107 countries and territories. The milestone reflects a broader transition underway across high-stakes industries including legal, risk, compliance, tax, accounting, audit and global trade professionals. AI is moving from experimentation to production. Rather than standalone tools, firms are embedding AI directly into daily workflows where accuracy, sourcing, and data protection are essential.

General-purpose AI can generate plausible answers. Regulated professionals, however, need AI that withstands review in courtrooms, audits, and regulatory proceedings.

These systems need to retrieve authoritative sources, verify citations, and apply jurisdiction-specific rules.

CoCounsel fulfills those requirements, powering intelligent capabilities across the company's portfolio—including CoCounsel Legal, CoCounsel Tax and Audit, and ONESOURCE+. It integrates into the tools professionals already use, analyzes licensed content refined over 175 years, incorporates expert-developed validation logic, and delivers structured, citation-backed outputs. Customer data remains protected and is not repurposed to train third-party models. More than 4,500 Thomson Reuters subject matter experts contribute to the validation and continuous refinement of CoCounsel's outputs across legal, tax, and compliance domains.

"Professionals are not deciding whether to use AI anymore. They are deciding which AI they trust when their reputation and their clients' data are on the line," said Steve Hasker, President and Chief Executive Officer, Thomson Reuters. "CoCounsel is built for moments when being almost right is not good enough. It is grounded in decades of authoritative content, validated by domain experts, and backed by a clear commitment that customer data remains theirs. That is why one million professionals rely on CoCounsel."

"When the work matters, the AI must be professional grade. Professionals need systems that can complete sophisticated work within the standards they are accountable to every day. That's the gap between CoCounsel and everything else," added David Wong, Chief Product Officer, Thomson Reuters. "One million CoCounsel users across 100+ countries and territories reflects a shared global consensus."

Built for Regulated Work
CoCounsel's adoption reflects design decisions tailored to professional environments:

• Licensed, authoritative content. Outputs are grounded in editorially enhanced legal and tax sources, not scraped public data.
• Expert validation. Domain specialists shape workflow logic and quality standards in areas where errors carry consequences.
• Workflow integration. CoCounsel operates inside research, drafting, and compliance platforms enabling task execution within established professional systems.
• Data boundaries by design. Thomson Reuters does not repurpose customer inputs to train third-party models or generate outputs for other users.
• Multi-model architecture with governance. Thomson Reuters works with leading frontier models, including Anthropic's Claude, OpenAI's GPT and Google's Gemini, alongside proprietary AI technology and structured datasets to maintain performance control and system-level oversight.

From Tool to Execution Layer
In legal, tax, audit, and compliance workflows, AI must retrieve relevant authority, analyze structured and unstructured information, apply jurisdictional rules, and generate outputs that stand under review. That requires vertically integrated systems.

CoCounsel functions as an execution layer embedded within professional platforms, combining foundation models, proprietary AI engineering, proprietary content, and domain expertise to complete multi-step workflows end to end.

The next generation of CoCounsel Legal, entering beta soon, is designed around conversational task execution. Soon, legal professionals within law firms and corporations, will be able to describe an objective as they would brief a colleague. CoCounsel will build a plan, retrieve authority from Westlaw and Practical Law, search relevant user documents and precedent, analyze the material, verify that citations remain in good law, and deliver structured work product within a single system. Additional next-generation capabilities within CoCounsel Tax and ONESOURCE+ are planned for later in 2026.

As AI becomes embedded in professional systems, the defining question is not how quickly it can produce text, but whether it can support work that carries legal or financial consequences.

With one million professionals relying on CoCounsel, Thomson Reuters is not participating in the AI race. It is defining how AI operates in the world's highest-stakes work.

About Thomson Reuters 
Thomson Reuters (TSX/Nasdaq: TRI) informs the way forward by bringing together the trusted content and technology that people and organizations need to make the right decisions. The company serves professionals across legal, tax, audit, accounting, compliance, government, and media. Its products combine highly specialized software and insights to empower professionals with the data, intelligence, and solutions needed to make informed decisions, and to help institutions in their pursuit of justice, truth, and transparency. Reuters, part of Thomson Reuters, is a world-leading provider of trusted journalism and news. 

For more information, visit thomsonreuters.com/cocounsel.  

Media contact 
Ali Hughes, Director, Technology and Innovation Communications 
Ali.Hughes@tr.com 

Notes to Editors 

• Product scope: CoCounsel is the AI technology underpinning generative and agentic capabilities across Thomson Reuters legal, tax, accounting, audit, risk, compliance, and corporate solutions. 
• Recent product update: Over the past year, Thomson Reuters has launched dozens of CoCounsel-powered capabilities across research, drafting, analysis, compliance, and workflow automation, including Deep Research and Ready to Review.
• Model Strategy: Thomson Reuters works with leading model providers and is developing a proprietary large language model designed specifically for professional and regulated use cases. 
• Investment: Thomson Reuters continues to invest significant capital in AI development and acquisitions, reinforcing long-term commitment to professional-grade AI without raising external capital. 

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SOURCE Thomson Reuters

FAQ

How many professionals use CoCounsel and where is it available (TRI)?

CoCounsel is used by one million professionals across 107 countries and territories. According to Thomson Reuters, that adoption reflects production use in legal, tax, audit, and compliance workflows worldwide.

What protections does CoCounsel offer for customer data (TRI)?

CoCounsel keeps customer inputs protected and does not repurpose them to train third-party models. According to Thomson Reuters, data boundaries and governance are built into system design to support regulated work.

What technologies power CoCounsel and how does TRI govern them?

CoCounsel uses a multi-model architecture combining Anthropic, OpenAI, Google models, proprietary AI and structured datasets. According to Thomson Reuters, governance and proprietary content maintain performance control and oversight.

When will the next-generation CoCounsel Legal features be available for users (TRI)?

The next-generation CoCounsel Legal is entering beta soon with conversational task execution. According to Thomson Reuters, additional CoCounsel Tax and ONESOURCE+ capabilities are planned later in 2026.

How does CoCounsel ensure outputs are authoritative for legal work (TRI)?

CoCounsel grounds outputs in licensed editorial content, verifies citations, and uses domain specialist validation. According to Thomson Reuters, this approach aims to produce citation-backed, reviewable work for regulated professionals.