Exhibit 99.1

Thomson Reuters Corporation

19 Duncan Street

Toronto, Ontario M5H 3H1

Canada

Tel (647) 480-7000

March 4, 2026

British Columbia Securities Commission

Alberta Securities Commission

Financial and Consumer Affairs Authority of Saskatchewan

The Manitoba Securities Commission

Ontario Securities Commission

Autorité des marchés financiers

Financial and Consumer Services Commission (New Brunswick)

Nova Scotia Securities Commission Financial and Consumer Services Division, Prince Edward Island

Office of the Superintendent of Securities Service, Newfoundland and Labrador

Office of the Yukon Superintendent of Securities

Office of the Superintendent of Securities, Northwest Territories

Office of the Superintendent of Securities, Nunavut Toronto Stock Exchange

CDS Clearing and Depository Services Inc.

The Depository Trust Company

Re:	Thomson Reuters – Notification of Meeting and Record Date

Ladies and Gentlemen,

Pursuant to National Instrument 54-101, Communication with Beneficial Owners of Securities of a Reporting Issuer (NI 54-101), we advise the following:


Date of Meeting		June 10, 2026

Record Date for Notice and Voting		April 13, 2026

Beneficial Ownership Determination Date		April 13, 2026

Class of Securities Entitled to Receive Notice of and Vote at the Meeting		Common Shares

Whether the Meeting is a Special Meeting (as defined by NI 54-101)		No

Issuer Using Notice-and-Access for Registered Holders and Beneficial Owners		Yes

Issuer Sending Proxy-Related Materials Directly to Non-Objecting Beneficial Owners		No

Issuer Paying for Proximate Intermediaries to Send Proxy-Related Materials to Objecting Beneficial Owners		Yes

CUSIP		884903808

Notice-and-Access Stratification		Copies of the management proxy circular and other proxy-related materials will be electronically delivered to shareholders in accordance with existing requests

Sincerely,

/s/ Jennifer Ruddick

Jennifer Ruddick

Deputy Company Secretary

THOMSON REUTERS CORP /CAN/ 6-K