Director/PDMR Shareholding

Vianet Group plc (the "Company")

Holdings in Company

The Company was notified on 13th August 2014 by James Dickson, Executive Chairman of Vianet Group plc, that his pension fund purchased 41,652 ordinary shares at 80.0p each and 500 ordinary shares at 79p each, on 12th August, taking his total voting interests to 4,432,686 ordinary shares representing 15.94% of the total share capital with voting rights of the Company.

Contacts:

Enquiries:

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

Stephen Keys, Callum Davidson at Cenkos Securities plc T: +44 (0)20 7397 8900