Director/PDMR Shareholding

Vianet Group plc

(the "Company")

Director's Dealings

The Company has been notified by James Dickson, Chairman of the Company, that on 21st January he was informed that his pension fund has purchased 30,000 ordinary shares as follows;

· 10,000 ordinary shares at a price of 90p per share on 18th January 2016

· 10,000 ordinary shares at a price of 92p per share on 21st January 2016

· 10,000 ordinary shares at a price of 92.4p per share on 21st January 2016

Following these transactions, James Dickson holds a total of 4,559,420 ordinary shares in the Company representing approximately 16.37% of its issued share capital.

Contacts:

Enquiries:

James Dickson, Chairman / Mark Foster CFO T: +44 (0)1642 358 800

Stephen Keys/Camilla Hume Cenkos Securities plc T: +44 (0)20 7397 8900