RNS Number : 0531F

Thomson Reuters PLC

03 October 2008

TR-1: notification of major interests in shares

1. Identity of the issuer or the underlying THOMSON REUTERS PLC

issuer of existing shares to which voting

rights are attached:

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

Other (please specify): New Exemption DTR 5.1.3 (4) & DTR 5.1.5 (1)

3. Full name of person(s) subject to the ValueAct Capital Management,

notification obligation: L.P.

4. Full name of shareholder(s) (if different

from 3.):

5. Date of the transaction (and date on which 30 September 2008

the threshold is crossed or reached if

different):

6. Date on which issuer notified: 1 October 2008

7. Threshold(s) that is/are crossed or reached: 5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares Situation previous to the Triggering Resulting situation after the triggering transaction

if possible using transaction

the ISIN CODE

Number of Shares Number of Voting Number of shares Number of voting % of voting

Rights viii rights ix rights

Direct x Indirect xi Direct Indirect

(i) Ordinary shares 7,361,669 7,361,669 9,048,669 9,048,669 - 5.05% -

B: Financial Instruments

Resulting situation after the triggering transaction xii

Type of financial instrument Expiration date xiii Exercise/ Conversion Number of voting % of voting rights

Period/ Date xiv rights that may be

acquired if the

instrument is

exercised/

converted.

Total (A+B)

Number of voting rights % of voting rights

9,048,669 5.05%

9. Chain of controlled undertakings through which the voting rights and/or

the financial instruments are effectively held, if applicable xv:

The ordinary shares are held by ValueAct Capital Master Fund, L.P. VA

Partners I, LLC is the general partner of ValueAct Capital Master Fund, L.P.

ValueAct Capital Management, L.P. is the manager of ValueAct Capital Master

Fund, L.P. ValueAct Capital Management, LLC is the general partner of

ValueAct Capital Management, L.P. ValueAct Holdings, L.P. is the sole owner

of the limited partnership interests of ValueAct Capital Management, L.P. and

the membership interests of ValueAct Capital Management, LLC, and is the

majority owner of the membership interests of VA Partners I, LLC. ValueAct

Holdings GP, LLC is the General Partner of ValueAct Holdings, L.P.

Proxy Voting:

10. Name of the proxy holder:

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

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

This information is provided by RNS

The company news service from the London Stock Exchange

END

HOLBBBDGUBGGGIX