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”) This notification has been received by Hammerson Plc pursuant to the relevant shareholder's obligations pursuant to applicable UK law. TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB00BK7YQK64 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 BlackRock, Inc. City of registered office (if applicable) Wilmington Country of registered office (if applicable) USA 4. Details of the shareholder Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above City of registered office (if applicable) Country of registered office (if applicable) 5. Date on which the threshold was crossed or reached 12-Apr-2023 6. Date on which Issuer notified 13-Apr-2023 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 held to shares (total instruments (total 8.B) in issuer of 8.A) of 8.B 1 + 8.B 2) Resulting situation on the date on which 5.010000 0.950000 5.960000 298727187 threshold was crossed or reached Position of previous 1.720000 4.830000 6.550000 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 Number of indirect % of direct % of indirect voting shares ISIN code(if direct voting voting rights voting rights rights (DTR5.2.1) possible) rights (DTR5.1) (DTR5.2.1) (DTR5.1) GB00BK7YQK64 250638732 5.010000 Sub Total 8.A 250638732 5.010000% 8B1. Financial Instruments according to (DTR5.3.1R.(1) (a)) Number of voting rights that may be Type of financial Exercise/conversion % of voting Expiration date acquired if the instrument period rights instrument is exercised/converted Securities 35443268 0.700000 Lending Sub Total 8.B1 35443268 0.700000% 8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b)) Type of Physical or Expiration Exercise/conversion Number of % of voting financial cash date period voting rights rights instrument settlement CFD Cash 12645187 0.250000 Sub Total 8.B2 12645187 0.250000% 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 Total of both if rights if it through financial it equals or is Ultimate Name of controlled equals or is instruments if it higher than controlling person undertaking higher than the equals or is higher the notifiable notifiable than the notifiable threshold threshold threshold BlackRock, BlackRock Holdco Inc. (Chain 1) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 1) Management, Inc. BlackRock BlackRock, International Inc. (Chain 1) Holdings, Inc. BR Jersey BlackRock, International Inc. (Chain 1) Holdings L.P. BlackRock BlackRock, (Singapore) Inc. (Chain 1) Holdco Pte. Ltd. BlackRock, BlackRock HK Inc. (Chain 1) Holdco Limited BlackRock, BlackRock Lux Inc. (Chain 1) Finco S.a.r.l. BlackRock, BlackRock Japan Inc. (Chain 1) Holdings GK BlackRock, BlackRock Japan Inc. (Chain 1) Co., Ltd. BlackRock, Trident Merger, Inc. (Chain 2) LLC BlackRock BlackRock, Investment Inc. (Chain 2) Management, LLC BlackRock, BlackRock Holdco Inc. (Chain 3) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 3) Management, Inc. BlackRock BlackRock, International Inc. (Chain 3) Holdings, Inc. BR Jersey BlackRock, International Inc. (Chain 3) Holdings L.P. BlackRock, BlackRock Holdco Inc. (Chain 3) 3, LLC BlackRock, BlackRock Inc. (Chain 3) Cayman 1 LP BlackRock BlackRock, Cayman West Bay Inc. (Chain 3) Finco Limited BlackRock BlackRock, Cayman West Bay Inc. (Chain 3) IV Limited BlackRock, BlackRock Group Inc. (Chain 3) Limited BlackRock BlackRock, Finance Europe Inc. (Chain 3) Limited BlackRock BlackRock, Investment Inc. (Chain 3) Management (UK) Limited BlackRock, BlackRock Holdco Inc. (Chain 4) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 4) Management, Inc. BlackRock BlackRock, International Inc. (Chain 4) Holdings, Inc. BR Jersey BlackRock, International Inc. (Chain 4) Holdings L.P. BlackRock BlackRock, Australia Holdco Inc. (Chain 4) Pty. Ltd. BlackRock Investment BlackRock, Management Inc. (Chain 4) (Australia) Limited BlackRock, BlackRock Holdco Inc. (Chain 5) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 5) Management, Inc. BlackRock, BlackRock Holdco Inc. (Chain 5) 4, LLC BlackRock, BlackRock Holdco Inc. (Chain 5) 6, LLC BlackRock BlackRock, Delaware Inc. (Chain 5) Holdings Inc. BlackRock, BlackRock Inc. (Chain 5) Institutional Trust Company, National Association BlackRock, BlackRock Holdco Inc. (Chain 6) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 6) Management, Inc. BlackRock, BlackRock Holdco Inc. (Chain 6) 4, LLC BlackRock, BlackRock Holdco Inc. (Chain 6) 6, LLC BlackRock BlackRock, Delaware Inc. (Chain 6) Holdings Inc. BlackRock, BlackRock Fund Inc. (Chain 6) Advisors BlackRock, BlackRock Holdco Inc. (Chain 7) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 7) Management, Inc. BlackRock, BlackRock Holdco Inc. (Chain 8) 2, Inc. BlackRock BlackRock, Financial Inc. (Chain 8) Management, Inc. BlackRock BlackRock, International Inc. (Chain 8) Holdings, Inc. BR Jersey BlackRock, International Inc. (Chain 8) Holdings L.P. BlackRock, BlackRock Holdco Inc. (Chain 8) 3, LLC BlackRock BlackRock, Canada Holdings Inc. (Chain 8) LP BlackRock BlackRock, Canada Holdings Inc. (Chain 8) ULC BlackRock Asset BlackRock, Management Inc. (Chain 8) Canada Limited BlackRock, BlackRock Holdco Inc. (Chain 9) 2, Inc. BlackRock, BlackRock Inc. (Chain 9) Financial Management, Inc. BlackRock, BlackRock Capital Inc. (Chain 9) Holdings, Inc. BlackRock, BlackRock Inc. (Chain 9) Advisors, LLC BlackRock, BlackRock Holdco Inc. (Chain 2, Inc. 10) BlackRock, BlackRock Inc. (Chain Financial 10) Management, Inc. BlackRock, BlackRock Inc. (Chain International 10) Holdings, Inc. BlackRock, BR Jersey Inc. (Chain International 10) Holdings L.P. BlackRock, BlackRock Holdco Inc. (Chain 3, LLC 10) BlackRock, BlackRock Inc. (Chain Cayman 1 LP 10) BlackRock, BlackRock Inc. (Chain Cayman West Bay 10) Finco Limited BlackRock, BlackRock Inc. (Chain Cayman West Bay 10) IV Limited BlackRock, BlackRock Group Inc. (Chain Limited 10) BlackRock, BlackRock Inc. (Chain Finance Europe 10) Limited BlackRock, BlackRock Inc. (Chain Advisors (UK) 10) Limited 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 BlackRock Regulatory Threshold Reporting Team Jana Blumenstein 020 7743 3650 12. Date of Completion 13th April 2023 13. Place Of Completion 12 Throgmorton Avenue, London, EC2N 2DL, U.K For further information contact: Richard Crowle Senior Assistant Company Secretary Tel: +44 (0)20 7887 1000 14 April 2023 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