TR-1: Standard form for notification of major holdings Hammerson plc (Incorporated in England and Wales) (Company number 360632) LSE and Euronext Dublin share code: HMSO JSE share code: HMN ISIN: GB00BRJQ8J25 ("Hammerson" or "the Company") TR-1: Standard form for notification of major holdings This notification has been received by Hammerson Plc pursuant to the relevant shareholder's obligations pursuant to applicable UK law. 1. Issuer Details ISIN GB00BRJQ8J25 Issuer Name HAMMERSON PLC UK or Non-UK Issuer UK 2. Reason for Notification An acquisition or disposal of voting rights 3. Details of person subject to the notification obligation Name Wellington Management Group LLP City of registered office (if applicable) Boston Country of registered office (if applicable) United States 4. Details of the shareholder City of registered Country of registered Name office office Vidacos Nominees Limited State Street Nominees Limited ROY Nominees Limited Mellon Nominees (UK) Ltd. JP Morgan Chase Nominees Limited Goldman Sachs International 5. Date on which the threshold was crossed or reached 16-Dec-2024 6. Date on which Issuer notified 17-Dec-2024 7. Total positions of person(s) subject to the notification obligation % of voting % of voting rights Total of both Total number of rights attached through financial . in % (8.A + voting rights to shares (total instruments (total 8.B) held in issuer of 8.A) of 8.B 1 + 8.B 2) Resulting situation on the date on which 4.980000 0.040000 5.020000 24749461 threshold was crossed or reached Position of previous 4.940000 0.050000 4.990000 notification (if applicable) 8. Notified details of the resulting situation on the date on which the threshold was crossed or reached 8A. Voting rights attached to shares Class/Type of Number of direct Number of indirect % of direct % of indirect voting shares ISIN voting rights voting rights voting rights rights (DTR5.2.1) code(if possible) (DTR5.1) (DTR5.2.1) (DTR5.1) GB0004065016 24540001 4.980000 Sub Total 8.A 24540001 4.980000% 8B1. Financial Instruments according to (DTR5.3.1R.(1) (a)) Number of voting rights that may % of Type of financial Expiration Exercise/conversion be acquired if the instrument is voting instrument date period exercised/converted rights Sub Total 8.B1 8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b)) Type of Physical or Exercise/conversion Number of % of voting financial Expiration date cash period voting rights rights instrument settlement Equity 05/05/2028 05/05/2028 Cash 209460 0.040000 Swap Sub Total 8.B2 209460 0.040000% 9. Information in relation to the person subject to the notification obligation 2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary) % of voting % of voting rights rights if it through financial Total of both if it Ultimate Name of controlled equals or is instruments if it equals or is higher controlling person undertaking higher than equals or is higher than the notifiable the notifiable than the notifiable threshold threshold threshold Wellington Wellington Management Group Holdings 5.020000% Group LLP LLP (Chain 1) Wellington Wellington Management Investment 5.020000% Group LLP Advisors (Chain 1) Holdings LLP Wellington Wellington Management Management Group LLP Company LLP (Chain 1) Wellington Wellington Management Group Holdings 5.020000% Group LLP LLP (Chain 2) Wellington Wellington Management Investment 5.020000% Group LLP Advisors (Chain 2) Holdings LLP Wellington Wellington Management Management Group LLP Global (Chain 2) Holdings, Ltd. Wellington Wellington Management Management Group LLP International (Chain 2) Ltd 10. In case of proxy voting Name of the proxy holder The number and % of voting rights held The date until which the voting rights will be held 11. Additional Information Wellington Management Company LLP is a direct controlled undertaking of Wellington Investment Advisors Holdings LLP, which, in turn, is a direct controlled undertaking of Wellington Group Holdings LLP, which, in turn, is a direct controlled undertaking of Wellington Management Group LLP. Wellington Management International Ltd is a direct controlled undertaking of Wellington Management Global Holdings, Ltd., which, in turn, is a direct controlled undertaking of Wellington Investment Advisors Holdings LLP, which, in turn, is a direct controlled undertaking of Wellington Group Holdings LLP, which, in turn, is a direct controlled undertaking of Wellington Management Group LLP. 12. Date of Completion 17-Dec-2024 13. Place Of Completion London, UK For further information contact: Richard Crowle Senior Assistant Company Secretary Tel: +44 (0)20 7887 1000 17 December 2024 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 Date: 17-12-2024 05:30:00 Produced by the JSE SENS Department. The SENS service is an information dissemination service administered by the JSE Limited ('JSE'). The JSE does not, whether expressly, tacitly or implicitly, represent, warrant or in any way guarantee the truth, accuracy or completeness of the information published on SENS. The JSE, their officers, employees and agents accept no liability for (or in respect of) any direct, indirect, incidental or consequential loss or damage of any kind or nature, howsoever arising, from the use of SENS or the use of, or reliance on, information disseminated through SENS.