RNS Number:7966S

Thomson Reuters PLC

21 April 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:

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

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An acquisition or disposal of voting rights x

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An acquisition or disposal of financial instruments which may result in

the acquisition of shares already issued to which voting rights are -----

attached

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An event changing the breakdown of voting rights

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

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

notification obligation: L.P.

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

3.): ------------------

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5. Date of the transaction (and date on which the 17 April 2008

threshold is crossed or reached if different): ---------------------

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6. Date on which issuer notified: 18 April 2008

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

reached: 3%

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8. Notified details:

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A: Voting rights attached to shares

Class/ Situation previous Resulting situation after the triggering

type of to the Triggering transaction

shares transaction

if

possible Number Number of Number of Number of voting % of voting

using of Voting Rights shares rights ix rights

the ISIN Shares viii

CODE Direct x Indirect Direct Indirect

xi

(i)

Ordinary Below Below 3% 6,110,254 6,110,254 3.2%

shares 3%

B: Financial Instruments

Resulting situation after the triggering transaction xii

Type of Expiration Exercise/ Number of voting rights that may % of

financial date xiii Conversion be acquired if the instrument is voting

instrument Period/ Date exercised/ converted. rights

xiv

Total (A+B)

Number of voting rights % of voting rights

6,110,254 3.2%

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. (6,110,254

ordinary shares). VA Partners I, LLC is the general partner of ValueAct Capital

Master Fund, L.P. VA Partners III, LLC is the general partner of ValueAct

Capital Master Fund III, L.P. ValueAct Capital Management, L.P. is the manager

of ValueAct Capital Master Fund, L.P. and ValueAct Capital Master Fund III, 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 and VA Partners III, 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

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