RNS Number : 5492V Vianet Group PLC 03 February 2025 Vianet Group PLC ("Vianet" or the "Group") Share Buyback and Total Voting Rights Further to the Company's announcement made on 3 December 2024, the Company announces that on 31 January 2025 it purchased 20,000 ordinary shares of 10 pence each in the Company ("Ordinary Shares"). The purchased Ordinary Shares will be cancelled. Total Voting Rights Following the purchase and cancellation of these Ordinary Shares, the Company's issued share capital will consist of 29,135,164 Ordinary Shares with each Ordinary Share carrying the right to one vote. There are no Ordinary Shares held in treasury and therefore, the total number of voting rights in the Company following Admission will be 29,135,164. This figure may be used by shareholders in the Company 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 share capital of the Company under the Disclosure Guidance and Transparency Rules. In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (the Market Abuse Regulation), a detailed breakdown of individual trades is available below: Enquiries: This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com. RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy. END POSUAUWRVAUAOAR