Mondi plc (Incorporated in England and Wales) (Registered number: 6209386) LEI: 213800LOZA69QFDC9N34 LSE share code: MNDI ISIN: GB00B1CRLC47 JSE share code: MNP 19 January 2024 Notification of Major Interests in Shares 1. Issuer Details: ISIN: GB00B1CRLC47 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: BlackRock, Inc. City of registered office: Wilmington Country of registered office: USA 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 January 2024 6. Date on which Issuer notified: 19 January 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 5.370000 1.690000 7.060000 34,388,089 crossed or reached Position of previous notification (if 4.880000 2.180000 7.060000 applicable) 8. Notified details of the resulting situation on the date 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) GB00B1CRLC47 26,099,513 5.370000 Subtotal 8.A 26,099,513 5.370000% 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. American 1,078 0.000000 Depository Receipt Securities Lending 8,205,672 1.680000 8,206,750 1.680000% 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 CFD Cash 81,826 0.010000 Subtotal 8.B 2 81,826 0.010000% 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) Ultimate Name of % of % of voting Total of controlling controlled voting rights both if it person undertaking rights if it through equals or equals or financial is higher is higher instruments than the than the if it equals notifiable notifiable or is higher threshold threshold than the notifiable threshold BlackRock, BlackRock Inc. Holdco 2, (Chain 1) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 1) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 1) Inc. BlackRock, BR Jersey Inc. International (Chain 1) Holdings L.P. BlackRock BlackRock, (Singapore) Inc. Holdco Pte. (Chain 1) Ltd. BlackRock, BlackRock HK Inc. Holdco (Chain 1) Limited BlackRock, BlackRock Inc. Lux Finco (Chain 1) S.a.r.l. BlackRock, BlackRock Inc. Japan (Chain 1) Holdings GK BlackRock, BlackRock Inc. Japan Co., (Chain 1) Ltd. BlackRock, Trident Inc. Merger, LLC (Chain 2) BlackRock BlackRock, Investment Inc. Management, (Chain 2) LLC BlackRock, BlackRock Inc. Holdco 2, (Chain 3) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 3) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 3) Inc. BlackRock, BR Jersey Inc. International (Chain 3) Holdings L.P. BlackRock, BlackRock Inc. Holdco 3, LLC (Chain 3) BlackRock, BlackRock Inc. Cayman 1 LP (Chain 3) BlackRock BlackRock, Cayman West Inc. Bay Finco (Chain 3) Limited BlackRock BlackRock, Cayman West Inc. Bay IV (Chain 3) Limited BlackRock, BlackRock Inc. Group (Chain 3) Limited BlackRock BlackRock, Finance Inc. Europe (Chain 3) Limited BlackRock BlackRock, Investment Inc. Management (Chain 3) (UK) Limited BlackRock, BlackRock Inc. Holdco 2, (Chain 4) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 4) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 4) Inc. BlackRock, BR Jersey Inc. International (Chain 4) Holdings L.P. BlackRock BlackRock, Australia Inc. Holdco Pty. (Chain 4) Ltd. BlackRock BlackRock, Investment Inc. Management (Chain 4) (Australia) Limited BlackRock, BlackRock Inc. Holdco 2, (Chain 5) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 5) Inc. BlackRock, BlackRock Inc. Holdco 4, LLC (Chain 5) BlackRock, BlackRock Inc. Holdco 6, LLC (Chain 5) BlackRock, BlackRock Inc. Delaware (Chain 5) Holdings Inc. BlackRock Institutional BlackRock, Trust Inc. Company, (Chain 5) National Association BlackRock, BlackRock Inc. Holdco 2, (Chain 6) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 6) Inc. BlackRock, BlackRock Inc. Holdco 4, LLC (Chain 6) BlackRock, BlackRock Inc. Holdco 6, LLC (Chain 6) BlackRock, BlackRock Inc. Delaware (Chain 6) Holdings Inc. BlackRock, BlackRock Inc. Fund (Chain 6) Advisors BlackRock, BlackRock Inc. Holdco 2, (Chain 7) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 7) Inc. BlackRock, BlackRock Inc. Holdco 2, (Chain 8) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 8) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 8) Inc. BlackRock, BR Jersey Inc. International (Chain 8) Holdings L.P. BlackRock BlackRock, (Singapore) Inc. Holdco Pte. (Chain 8) Ltd. BlackRock, BlackRock HK Inc. Holdco (Chain 8) Limited BlackRock BlackRock, Asset Inc. Management (Chain 8) North Asia Limited BlackRock, BlackRock Inc. Holdco 2, (Chain 9) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 9) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 9) Inc. BlackRock, BR Jersey Inc. International (Chain 9) Holdings L.P. BlackRock, BlackRock Inc. Holdco 3, LLC (Chain 9) BlackRock, BlackRock Inc. Cayman 1 LP (Chain 9) BlackRock BlackRock, Cayman West Inc. Bay Finco (Chain 9) Limited BlackRock BlackRock, Cayman West Inc. Bay IV (Chain 9) Limited BlackRock, BlackRock Inc. Group (Chain 9) Limited BlackRock BlackRock, Finance Inc. Europe (Chain 9) Limited BlackRock, BlackRock Inc. (Netherlands) (Chain 9) B.V. BlackRock BlackRock, Asset Inc. Management (Chain 9) Deutschland AG BlackRock, BlackRock Inc. Holdco 2, (Chain 10) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 10) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 10) Inc. BlackRock, BR Jersey Inc. International (Chain 10) Holdings L.P. BlackRock, BlackRock Inc. Holdco 3, LLC (Chain 10) BlackRock, BlackRock Inc. Canada (Chain 10) Holdings LP BlackRock, BlackRock Inc. Canada (Chain 10) Holdings ULC BlackRock BlackRock, Asset Inc. Management (Chain 10) Canada Limited BlackRock, BlackRock Inc. Holdco 2, (Chain 11) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 11) Inc. BlackRock BlackRock, Capital Inc. Holdings, (Chain 11) Inc. BlackRock, BlackRock Inc. Advisors, LLC (Chain 11) BlackRock, BlackRock Inc. Holdco 2, (Chain 12) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 12) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 12) Inc. BlackRock, BR Jersey Inc. International (Chain 12) Holdings L.P. BlackRock, BlackRock Inc. Holdco 3, LLC (Chain 12) BlackRock, BlackRock Inc. Cayman 1 LP (Chain 12) BlackRock BlackRock, Cayman West Inc. Bay Finco (Chain 12) Limited BlackRock BlackRock, Cayman West Inc. Bay IV (Chain 12) Limited BlackRock, BlackRock Inc. Group (Chain 12) Limited BlackRock BlackRock, Finance Inc. Europe (Chain 12) Limited BlackRock, BlackRock Inc. Advisors (UK) (Chain 12) Limited BlackRock, BlackRock Inc. Holdco 2, (Chain 13) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 13) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 13) Inc. BlackRock, BR Jersey Inc. International (Chain 13) Holdings L.P. BlackRock BlackRock, (Singapore) Inc. Holdco Pte. (Chain 13) Ltd. BlackRock, BlackRock Inc. (Singapore) (Chain 13) Limited BlackRock, BlackRock Inc. Holdco 2, (Chain 14) Inc. BlackRock BlackRock, Financial Inc. Management, (Chain 14) Inc. BlackRock BlackRock, International Inc. Holdings, (Chain 14) Inc. BlackRock, BR Jersey Inc. International (Chain 14) Holdings L.P. BlackRock, BlackRock Inc. Holdco 3, LLC (Chain 14) BlackRock, BlackRock Inc. Cayman 1 LP (Chain 14) BlackRock BlackRock, Cayman West Inc. Bay Finco (Chain 14) Limited BlackRock BlackRock, Cayman West Inc. Bay IV (Chain 14) Limited BlackRock, BlackRock Inc. Group (Chain 14) Limited BlackRock BlackRock, Finance Inc. Europe (Chain 14) Limited BlackRock, BlackRock Inc. (Netherlands) (Chain 14) B.V. BlackRock, Trident Inc. Merger, LLC (Chain 15) BlackRock BlackRock, Investment Inc. Management, (Chain 15) LLC BlackRock, Amethyst Inc. Intermediate, (Chain 15) LLC BlackRock, Aperio Inc. Holdings, LLC (Chain 15) BlackRock, Aperio Inc. Group, LLC (Chain 15) 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: BlackRock Regulatory Threshold Reporting Team Jana Blumenstein 020 7743 3650 12. Date of completion: 19 January 2024 13. Place of completion: 12 Throgmorton Avenue, London, EC2N 2DL, U.K. Sponsor in South Africa: Merrill Lynch South Africa (Pty) Ltd t/s BofA Securities