1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Thomson-Reuters Plc

2. Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights 

X

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An event changing the breakdown of voting rights

3. Full name of person(s) subject to the notification obligation:

HSBC Holdings Plc   

4. Full name of shareholder(s) (if different from 3.):

HSBC Bank plc

HSBC Financial Products (France)

HSBC Global Asset Management (Canada) Limited

HSBC Investment Management

HSBC Trust Company (UK) Limited

SINOPIA ASSET MANAGEMENT

Sinopia Asset Management (UK) Limited

5. Date of the transaction and date on which the threshold is crossed or reached:

19th January 2009

6. Date on which issuer notified:

20th January 2009

7. Threshold(s) that is/are crossed or reached:

 5 %

8. Notified details:

A: Voting rights attached to shares

Class/type of shares 

 if possible using the ISIN CODE

Situation previous to the Triggering transaction 

Resulting situation after the triggering transaction

Number of Shares 

Number of Voting Rights viii

Number of shares 

Number of voting rights ix

% of voting rights

Direct  x

Indirect xi

Direct

Indirect

GB00B29MWZ99

12,488,394

12,488,394

10,403,501

9,974,019

429,482

5.50 %

0.24%

B: Financial Instruments

Resulting situation after the triggering transaction xii

Type of financial instrument 

Expiration date xiii

Exercise/ Conversion Period/ Date xiv 

Number of voting rights that may be acquired if the instrument is exercised/ converted. 

% of voting rights

Total (A+B)

Number of voting rights

% of voting rights

10,403,501

5.74 %

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable xv:

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will cease to hold:

N/A

12. Date on which proxy holder will cease to hold voting rights:

N/A