Director/PDMR Shareholding

Vianet Group plc

(the "Company")

Holding(s) in Company

The Company was notified on 15th August 2014 by Mark Foster, Chief Financial Officer of Vianet Group plc, that his wife Karen Foster purchased 3,000 ordinary shares at 78.95p each, taking his total voting interests together with his wife to 78,000 ordinary shares representing 0.28% 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, Cenkos Securities plc T: +44 (0)20 7397 8900