Notification of Major Interests in Shares Mondi plc (Incorporated in England and Wales) (Registered number: 6209386) LEI: 213800LOZA69QFDC9N34 LSE share code: MNDI ISIN: GB00BMWC6P49 JSE share code: MNP 1 August 2025 Notification of Major Interests in Shares 1. Issuer Details ISIN GB00BMWC6P49 Issuer Name MONDI 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 SILCHESTER INTERNATIONAL INVESTORS LLP City of registered office (if applicable) London Country of registered office (if applicable) United Kingdom 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 30-Jul-2025 6. Date on which Issuer notified 31-Jul-2025 7. Total positions of person(s) subject to the notification obligation % of voting % of voting rights through Total of both Total number of rights attached financial . in % (8.A + voting rights to shares (total instruments 8.B) held in issuer of 8.A) (total of 8.B 1 + 8.B 2) Resulting situation on the date on which 5.020000 0.000000 5.020000 22167659 threshold was crossed or reached Position of previous 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 Number of Class/Type of Number of indirect % of indirect direct voting % of direct voting shares ISIN code(if voting rights voting rights rights rights (DTR5.1) possible) (DTR5.2.1) (DTR5.2.1) (DTR5.1) GB00BMWC6P49 0 22167659 0.000000 5.020000 Sub Total 8.A 22167659 5.020000% 8B1. Financial Instruments according to (DTR5.3.1R.(1) (a)) Number of voting rights that % of Type of financial Expiration Exercise/conversion may be acquired if the voting instrument date period instrument is rights exercised/converted Sub Total 8.B1 8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b)) Type of % of Expiration Exercise/conversion Physical or cash Number of financial voting date period settlement voting rights instrument rights Sub Total 8.B2 9. Information in relation to the person subject to the notification obligation 1. Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer. % of voting % of voting rights Total of both if it Name of rights if it equals through financial equals or is Ultimate controlled or is higher than instruments if it equals higher than the controlling person undertaking the notifiable or is higher than the notifiable threshold notifiable threshold threshold 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 Silchester International Investors LLP ("Silchester") acts as investment manager for certain commingled funds (our "Clients"). No Client holds more than 5% of voting rights. In acting for our Clients, Silchester is given full discretion over their investments and is empowered to vote on their behalf. However, we do not act as our Clients' custodian and therefore shares are not held in our name but in the name of each Client's custodian bank. The change in Silchester's holdings was due to a series of transactions over a series of different trading days. 12. Date of Completion 31-Jul-2025 13. Place Of Completion London, UK Sponsor in South Africa: Merrill Lynch South Africa (Pty) Ltd t/a BofA Securities Date: 01-08-2025 01:20:00 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.