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 19 September 2024 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: Allan Gray Proprietary Limited City of registered office: Cape Town Country of registered office: South Africa 4. Details of the shareholder: Full name of shareholder(s) if different from the persons(s) subject to the notification obligation, above: N/A City of registered office: N/A Country of registered office: N/A 5. Date on which the threshold was crossed or reached: 18-Sep-2024 6. Date on which Issuer notified: 19-Sep-2024 7. Total positions of person(s) subject to the notification obligation: % of voting rights % of voting rights Total of both in % Total number of attached to shares through financial (8.A + 8.B) voting rights held (total of 8. A) instruments (total in issuer of 8.B 1 + 8.B 2) Resulting situation on the date on which threshold was 6.006200 0.000000 6.006200 26,512,115 crossed or reached Position of previous notification (if 5.998100 0.000000 5.998100 applicable) 8. Notified details of the resulting situation on the date on which the threshold was crossed or reached: A: Voting rights attached to shares Class/type of No. of voting rights % of voting rights shares ISIN code (if Direct Indirect Direct Indirect possible) (DTR5.1) (DTR5.2.1) (DTR5.1) (DTR5.2.1) GB00BMWC6P49 26,512,115 0 6.006200 0.000000 Subtotal 8.A 26,512,115 6.006200% B1: Financial Instruments according to (DTR5.3.1.1 (a)) Type of financial Expiration Exercise/ Conversion Number of voting rights % of voting instrument date Period that may be acquired if rights the instrument is exercised/ converted. Subtotal 8.B 1 B2: Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b)) Type of Expiration Exercise/ Physical or cash Number of % of voting financial date Conversion settlement voting rights rights instrument Period Subtotal 8.B 2 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. Ultimate controlling Name of % of voting % of voting Total of both if person controlled rights if it rights through it equals or is undertaking equals or is financial higher than the higher than instruments if notifiable the notifiable it equals or is threshold threshold higher than the notifiable threshold 10. In case of proxy voting: Name of the proxy holder: N/A The number and % of voting rights held: N/A The date until which the voting rights will be held: N/A 11. Additional information: The ordinary shares acquired are held by Allan Gray's clients, as opposed to by Allan Gray itself. 12. Date of completion: 19-Sep-2024 13. Place of completion: Cape Town, South Africa Sponsor in South Africa: Merrill Lynch South Africa (Pty) Ltd t/s BofA Securities Date: 19-09-2024 04:00:00 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.