RNS Number:8935S

Thomson Reuters PLC

22 April 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 Group plc

issuer of existing shares to which voting rights --------------------

are attached:

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

2. Reason for notification (yes/no)

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

------

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) subject to Credit Suisse Securities (Europe) Limited

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

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

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

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): 22.04.08

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

6. Date on which issuer notified: 21.04.08

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

7. Threshold(s) that is/are

crossed or reached: 8%

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

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

8: Notified Details

A: Voting rights attached to shares

Class/type Situation Resulting situation after the triggering transaction

of shares previous to

the

triggering

transaction

If possible

use ISIN Number Number Number of Number of voting Percentage of

code of of shares rights voting rights

shares voting

rights Direct Indirect Direct Indirect

ORD n/a n/a 16,342,885 16,342,885 n/a 8.41%

GBooB29MWZ99

ADR n/a n/a 1,800 1,800 n/a 0.0009

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 rights

16,344,685 8.42%

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:

13. Additional information:

14 Contact name: Glenda Burford

15. Contact telephone number: +44207888 3599

This information is provided by RNS

The company news service from the London Stock Exchange

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