19 Dec 2007

The Thomson Corporation Disclosure in Accordance with Rule 2.10 and Rule 8.1 of the City Code

STAMFORD, Conn.

In accordance with Rule 2.10 and Rule 8.1 of the City Code on Takeovers and Mergers, The Thomson Corporation announces that on December 18, 2007, it purchased 50,000 of its common shares in the market.  The shares were purchased at prices ranging from C$38.62 to C$39.29 per share. The weighted average purchase price was C$38.86 per share.  These shares will be cancelled and as such for reporting purposes, the outstanding share balance has been reduced by the repurchased number.

The Thomson Corporation confirms that as of the close of business on December 18, 2007, it had 639,013,178 common shares in issue and outstanding.

The ISIN reference for these securities is CA8849031056.

Dealing Disclosure Requirements
Under the provisions of Rule 8.3 of the Takeover Code (the 'Code'), if any person is, or becomes, 'interested' (directly or indirectly) in 1% or more of any class of 'relevant securities' of Thomson or of Reuters, all 'dealings' in any 'relevant securities' of that company (including by means of an option in respect of, or a derivative referenced to, any such 'relevant securities') must be publicly disclosed by no later than 3.30 pm (London time) on the London business day following the date of the relevant transaction. This requirement will continue until the date on which the Transaction becomes, or is declared, unconditional, lapses or is otherwise withdrawn or on which the 'offer period' otherwise ends. If two or more persons act together pursuant to an agreement or understanding, whether formal or informal, to acquire an 'interest' in 'relevant securities' of Thomson or Reuters, they will be deemed to be a single person for the purpose of Rule 8.3.

Under the provisions of Rule 8.1 of the Code, all 'dealings' in 'relevant securities' of Thomson or Reuters by Thomson or Reuters, or by any of their respective 'associates', must be disclosed by no later than 12.00 noon (London time) on the London business day following the date of the relevant transaction.

A disclosure table, giving details of the companies in whose 'relevant securities' 'dealings' should be disclosed, and the number of such securities in issue, can be found on the Takeover Panel?s website at www.thetakeoverpanel.org.uk.

'Interests in securities' arise, in summary, when a person has long economic exposure, whether conditional or absolute, to changes in the price of securities. In particular, a person will be treated as having an 'interest' by virtue of the ownership or control of securities, or by virtue of any option in respect of, or derivative referenced to, securities.

Terms in quotation marks are defined in the Code, which can also be found on the Panel?s website. If you are in any doubt as to whether or not you are required to disclose a 'dealing' under Rule 8, you should consult the Panel.

The Thomson Corporation 
The Thomson Corporation (www.thomson.com) is a global leader in providing essential electronic workflow solutions to business and professional customers.  With operational headquarters in Stamford, Conn., Thomson provides value-added information, software tools and applications to professionals in the fields of law, tax, accounting, financial services, scientific research and healthcare.  The Corporation's common shares are listed on the New York and Toronto stock exchanges (NYSE: TOC; TSX: TOC).

 

Contacts

Fred Hawrysh
Senior Vice President, External Communications
Tel: +1 203 539 8314
Email

Frank Golden
Senior Vice President, Investor Relations
The Thomson Corporation
Tel: +1 203 539 8470
Email