Director/PDMR Shareholding

Vianet Group plc

(the "Company")

Director's Dealings

The Company was notified on 2nd April 2015 by James Dickson, Chairman of Vianet Group plc, that his pension fund purchased 41,560 ordinary shares at 89p each, on 1st April 2015, taking his total voting interests to 4,529,420 ordinary shares representing 16.26% of the total share capital with voting rights of the Company.

Contacts:

Enquiries:

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

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