Exhibit 99.1

Thomson Reuters Corporation

333 Bay Street, Suite 400

Toronto, Ontario M5H 2R2

Canada

Tel (416) 687-7500

January 12, 2017

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

Superintendent of Securities, Prince Edward Island

Superintendent of Securities, Newfoundland and Labrador

Superintendent of Securities, Yukon

Superintendent of Securities, Northwest Territories

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	May 3, 2017
Record Date for Notice and Voting	March 16, 2017
Beneficial Ownership Determination Date	March 16, 2017
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)	Yes
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	884903105
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/ Paula R. Monaghan

Paula R. Monaghan

Assistant Secretary