Notification of Transactions of Directors/Persons Discharging Managerial Responsibility or Connected Persons

NEW YORK, NY - December 31, 2008 - Thomson Reuters (NYSE: TRI; TSX: TRI; LSE: TRIL; NASDAQ: TRIN) today announced that on December 30, 2008, James C. Smith (CEO, Professional Division) acquired 1,056 Thomson Reuters Corporation common shares which were issued in connection with the vesting of certain restricted share units granted to him in December 2005. Thomson Reuters was notified of this transaction on December 30, 2008.

Following this transaction, Mr. Smith beneficially owns 5,168 Thomson Reuters Corporation common shares, 234,149 Thomson Reuters Corporation restricted share units, 46,521 Thomson Reuters Corporation deferred share units and 784,810 Thomson Reuters Corporation stock options. Mr. Smith's holdings do not exceed 1% of the issued share capital of either Thomson Reuters Corporation or Thomson Reuters PLC.

Thomson Reuters is voluntarily making a notification relating to securities of Thomson Reuters Corporation. Under its dual listed company structure, Thomson Reuters has two parent companies - Thomson Reuters Corporation and Thomson Reuters PLC. 

Contact:

Elizabeth Maclean

Assistant Company Secretary

Thomson Reuters PLC

elizabeth.maclean@thomsonreuters.com

Tel. no. 020 7542 6706