Thomson Reuters PLC 

Notification of Security Transactions

NEW YORK, NY - January 23, 2009 - In response to the UK Financial Services Authority's recent statement clarifying its view on the notification obligations of directors and other persons discharging managerial responsibilities (PDMRs) who grant security over shares, The Woodbridge Company Limited has advised Thomson Reuters (NYSE: TRI; TSX: TRI; LSE: TRIL; NASDAQ: TRIN) that it currently has 83,699,156 Thomson Reuters Corporation common shares pledged as collateral under financing arrangements entered into in the normal course, including its commercial paper program established in 1999.

Thomson Reuters was notified of the above on January 22, 2009.

The Woodbridge Company Limited and other companies affiliated with it(together, "Woodbridge") beneficially own 439,767,486 Thomson Reuters Corporation common shares, 14,842,487 Thomson Reuters PLC ordinary shares and 88,000 Thomson Reuters PLC ADSs (each representing six ordinary shares of Thomson Reuters PLC). Under the DLC structure, holders of Thomson Reuters Corporation common shares and Thomson Reuters PLC ordinary shares ordinarily vote together as a single decision-making body, including in the election of directors, and in that sense have voting interests in Thomson Reuters. Woodbridge has a voting interest in Thomson Reuters of approximately 55% based on the aggregate issued share capital of Thomson Reuters Corporation and Thomson Reuters PLC as at January 21, 2009. The Woodbridge Company Limited is the controlling shareholder of Thomson Reuters and certain of the Thomson Reuters non-executive directors are officers of Woodbridge.

Contact:

David W. Binet

Secretary to the Board

Thomson Reuters

david.binet@thomsonreuters.com

+1 416.681.0474