Director/PDMR Shareholding

Vianet Group plc

(the "Company")

The Company was notified on 01 July 2013 by Christopher Williams, Non-Executive Director of Vianet Group plc, that he purchased 3,000 ordinary shares at 74.35p each, taking his total voting interests to 4,250 ordinary shares representing 0.015% of the total share capital with voting rights of the Company.

Contacts:

Enquiries:

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

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