May 29, 2009

Thomson Reuters - Voting Rights and Capital

Update for May 29, 2009

NEW YORK, NY - May 29, 2009 - Thomson Reuters (NYSE: TRI; TSX: TRI; LSE: TRIL; NASDAQ: TRIN) today announced that:

• Thomson Reuters PLC had 181,229,241 ordinary shares issued and outstanding as of the close of business (London time) on May 29, 2009; and 

• Thomson Reuters Corporation had 647,403,178 common shares issued and outstanding as of the start of business (Toronto time) on May 28, 2009.

Under its dual listed company (DLC) structure, Thomson Reuters has two parent companies - Thomson Reuters Corporation and Thomson Reuters PLC. Holders of Thomson Reuters Corporation common shares and Thomson Reuters PLC ordinary shares both have a stake in Thomson Reuters, with cash dividend, capital distribution and voting rights that are comparable to the rights they would have if they were holding shares in one company carrying on Thomson Reuters business. Thomson Reuters had a total of 828,632,419 common shares and ordinary shares issued and outstanding as of today.

Shareholders determining whether they need to notify their voting interest in, or a change in their voting interest in, Thomson Reuters PLC under the UK FSA's Disclosure and Transparency Rules may use 181,229,241 as the denominator for their calculations. Shareholders with notification requirements in the United Kingdom may also wish to consult with their legal advisors regarding any applicable U.S. or Canadian filings or notifications regarding their Thomson Reuters voting interests. 

Thomson Reuters holds no shares in treasury at this time.

This notification is made in accordance with Disclosure and Transparency Rule 5.6.1.

Contact:

Elizabeth Maclean

Assistant Company Secretary

Thomson Reuters PLC

elizabeth.maclean@thomsonreuters.com

Tel. no. 020 7542 6706