Hammerson plc (Incorporated in England and Wales) (Company number 360632) LSE and Euronext Dublin share code: HMSO JSE share code: HMN ISIN: GB00BK7YQK64 (“Hammerson” or “the Company”) 20 March 2024 TRANSACTION IN OWN SHARES The Company announces that, in accordance with the terms of its share repurchase programme announced on 12 March 2024 (the “Share Repurchase Programme”), the Company has purchased the following number of its ordinary shares of 5 pence each from Morgan Stanley & Co. International plc. Such purchase was effected pursuant to instructions issued by the Company on 12 March 2024. Date of purchase: 19 March 2024 Number of ordinary shares purchased: 684,390 Highest price paid per share (pence): 26.58 Lowest price paid per share (pence): 26.12 Volume weighted average price paid per 26.39 share (pence): The Company will hold the purchased shares in treasury. A full breakdown of the individual trades made by Morgan Stanley & Co. International plc on behalf of the Company as part of the Share Repurchase Programme is attached to this document and can be accessed through the link provided below. http://www.rns-pdf.londonstockexchange.com/rns/4882H_1-2024-3-19.pdf Since 12 March 2024 pursuant to the Share Repurchase Programme, the Company has purchased 4,459,379 ordinary shares. Following the purchase of these shares, the Company holds 12,150,626 of its ordinary shares in treasury and has 4,990,114,981 ordinary shares in issue (excluding treasury shares). This announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction. Contact: Josh Warren Director of Strategy, Commercial Finance and Investor Relations Tel: +44 20 7887 1053 josh.warren@hammerson.com Richard Crowle Senior Assistant Company Secretary Tel: +44 20 7887 1000 Richard.crowle@hammerson.com Hammerson has its primary listing on the London Stock Exchange and secondary inward listings on the Johannesburg Stock Exchange and Euronext Dublin. Sponsor: Investec Bank Limited