TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

SOPHOS GROUP PLC

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 qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to thenotification obligation: iii

Apax US VII, LP, Apax Europe VII-A, LP, Apax Europe VII-B, LP, Apax Europe VII-1, LP, Apax Europe VI-A, LP and Apax Europe VI-I, LP, Pentagon Lock S.à r.l, Pentagon Lock 7-A S.à r.l, Pentagon Lock US S.à r.l, Pentagon Lock 6-A S.à r.l

4. Full name of shareholder(s)  (if different from 3.):iv

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

DATE OF TRANSACTION: 26 JUNE 2015

DATE THRESHOLD IS CROSSED: 1 JULY 2015

6. Date on which issuer notified:

1 JULY 2015

7. Threshold(s) that is/are crossed orreached: vi, vii

58.8% to 40.1%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

ORDINARY

GB00BYZFZ9

264,714,236

264,714,236

180,414,693

180,414,693

N/A

40.1%

N/A

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

180,414,693

40.1%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

Pentagon Lock S.à r.l. (17.9%), Pentagon Lock 7-A S.à r.l. (9.5%), Pentagon Lock US S.à r.l. (2.1%) and Pentagon Lock 6-A S.à r.l. (10.6%) together hold the direct legal title in the proportion refferred to herein.

Apax Europe VII-A, LP owns 100% of Pentagon Lock 7-A S.à r.l. Apax Europe VI-A, LP owns 100% of Pentagon Lock 6-A S.à r.l. Apax US VII, LP owns 100% of Pentagon Lock US S.à r.l. Apax Europe VII-B, LP owns 97.44% of Pentagon Lock S.à r.l. Apax Europe VII-1, LP owns 2.49% of Pentagon Lock S.à r.l. Apax Europe VI-I, LP owns 0.07% of Pentagon Lock S.à r.l.

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will ceaseto hold:

N/A

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

N/A

13. Additional information:

14. Contact name:

Gérard Maitrejean

15. Contact telephone number:

+(352) 46 83 83