RNS Number : 0882E

Thomson Reuters PLC

23 September 2008

TR-1: notification of major interests in shares

1. Identity of the issuer or the Thomson Reuters Plc

underlying 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

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):

3. Full name of person(s) Morgan Stanley

subject to the notification (Institutional Securities Group and Global

obligation: Wealth Management)

4. Full name of shareholder(s)

(if different from 3.):

5. Date of the transaction (and 19.09.08

date on which the threshold is

crossed or reached if

different):

6. Date on which issuer 22.09.08

notified:

7. Threshold(s) that is/are 3%

crossed or reached:

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 Direct x Indirect xi Direct Indirect

Ordinary Shares Below 3% Below 3% 5,810,665 5,810,665 3.21% 3.21%

GB00B29MWZ99

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

5,810,665 3.21%

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

the financial instruments are effectively held, if applicable xv:

Morgan Stanley & Co Inc. 4,626 0.002%

Morgan Stanley Securities Limited 5,735,405 3.176%

Morgan Stanley & Co International Plc 12,540 0.01%

Morgan Stanley Capital Luxembourg S.A 58,094 0.03%

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

This information is provided by RNS

The company news service from the London Stock Exchange

END

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