Director/PDMR Shareholding

Vianet Group plc

(the "Company")

Director's Dealings

The Company has been notified by Stewart Darling, CEO of the Company, that his pension fund today purchased 33,244 ordinary shares at a price of 94p per share. Following this transaction, Stewart Darling holds a total of 33,244 ordinary shares in the Company representing approximately 0.12% of its issued share capital.

Contacts:

Enquiries:

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

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