Vianet Group plc

("Vianet" or the "Company")

Purchase of Own Shares

Further to the confirmation of its intention to implement a share buyback programme, as set out in its announcement on 22 February 2022, the Company announces that it has purchased 9,000 of its ordinary shares of 10 pence each ("Ordinary Shares") at a price of 83.4   pence per share through Cenkos Securities plc. The Ordinary Shares purchased will be cancelled.

Aggregated information

Transaction details

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (the Market Abuse Regulation) (which forms part of domestic UK law pursuant to the European Union (Withdrawal) Act 2018), a detailed breakdown of individual trades is available below:

Total voting rights

Following the purchase and cancellation of these Ordinary Shares, the Company's total issued share capital will consist of 28,953,414 Ordinary Shares, each carrying one voting right. The Company does not hold any Ordinary Shares in treasury. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules.

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