Vianet Grp Regulatory News (VNET)

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

Vianet Group plc

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

An acquisition or disposal of voting rights

No

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

No

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

No

An event changing the breakdown of voting rights

No

Other (please specify): See box 13

Yes

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

Livingbridge VC LLP

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

Baronsmead Venture Trust plc - 3.70%

Baronsmead Second Venture Trust plc - 3.70%

Baronsmead VCT 5 plc - 2.23%

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

11/03/2016

6. Date on which issuer notified:

16/03/2016

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

3%

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

Numberofhares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB00B13YVN56

GBP 10

2,693,982

9.63%

2,693,982

9.63%

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

Nil

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

2,693,982

9.63%

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

Livingbridge VC LLP

Baronsmead Venture Trust plc - 3.70%

Baronsmead Second Venture Trust plc - 3.70%

Baronsmead VCT 5 plc - 2.23%

Registered in the name of Chase Nominees Ltd

Proxy Voting:

10. Name of the proxy holder:

Livingbridge VC LLP

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:

Vianet Group plc shares formerly held by Baronsmead VCT plc have been transferred to Baronsmead Venture Trust plc as a result of a merger and shares held by Baronsmead VCT 4 plc have been transferred to Baronsmead Second Venture Trust plc.

14. Contact name:

Karen Huxley

15. Contact telephone number:

020 7506 5643