RNS Number:6208T

Thomson Reuters PLC

01 May 2008

Form TR-1 with annex. FSA Version 2.1 updated April 2007

For filings with the FSA include the annex

For filings with issuer exclude the annex

TR-1: Notifications 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 notification (yes/no)

------------------------------------------------

------

An acquisition or disposal of voting rights YES

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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

------------------------------------------

An event changing the breakdown of voting rights

------------------------------------------ ------

Other (please specify):______________

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3. Full name of person(s) subject to Credit Suisse Securities (Europe) Ltd

notification obligation: ------------------------

--------------------------

4. Full name of shareholder(s) (if Credit Suisse Securities (Europe) Ltd

different from 3):

Credit Suisse International

Credit Suisse Securities (USA) LLC

-------------------------- ---------------------

5. Date of transaction (and date

on which the threshold is crossed

or reached if different): 29.04.08

-------------------------- ---------------------

6. Date on which issuer notified: 01.05.08

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7. Threshold(s) that is/are

crossed or reached: 9%

-------------------------- ---------------------

-------------------------- ---------------------

8: Notified Details

A: Voting rights attached to shares

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

of shares triggering transaction

If possible

use ISIN Number of Number of Number of Number of voting % of

code shares voting rights shares rights voting rights

Direct Indirect Direct

ORD 16,342,885 16,342,885 17,507,210 17,507,210 n/a 9.02%

GBooB29MWZ99

ADR 1,800 1,800 2,466 2,466 n/a 0.0013%

US8851411012

B: Financial Instruments

Resulting situation after the triggering transaction

Type of Expiration Exercise/ No. of voting rights that may Percentage

financial date conversion be acquired (if the instrument of voting

instrument period/date exercised/converted) rights

Total (A+B)

Number of voting rights Percentage of voting right

17,509,676 9.02%

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

financial instruments are effectively held, if applicable:

Credit Suisse Securities (Europe) Limited , Credit Suisse International and

Credit Suisse Securities (USA) LLC are a division of Credit Suisse ('CSIBD'),

which is part of the Credit Suisse Group ('CSG'). CSIBD is a segregated business

unit within CSG with an independent management structure and exercises its

voting rights independently from other divsions of CSG

Proxy Voting:

10. Name of 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

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