Holding(s) in Company

About this update from Morgan Advanced Materials Plc

TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB0006027295 Issuer Name MORGAN ADVANCED MATERIALS 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 Black Creek Investment Management Inc. City of registered office (if applicable) Toronto Country of registered office (if applicable) Canada 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 27-Jan-2026 6. Date on which Issuer notified 29-Jan-2026 7. Total positions of person(s) subject to the notification obligation % of voting rights attached to shares (total of 8.A) % of voting rights through financial instruments (total of 8.B 1 + 8.B 2) Total of both in % (8.A + 8.B) Total number of voting rights held in issuer Resulting situation on the date on which threshold was crossed or reached 5.980945 0.000000 5.980945 16558058 Position of previous notification (if applicable) 6.030880 0.000000 6.030880 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 shares ISIN code(if possible) Number of direct voting rights (DTR5.1) Number of indirect voting rights (DTR5.2.1) % of direct voting rights (DTR5.1) % of indirect voting rights (DTR5.2.1) GB0006027295 2172349 14385709 0.784675 5.196270 Sub Total 8.A 16558058 5.980945% 8B1. Financial Instruments according to (DTR5.3.1R.(1) (a)) Type of financial instrument Expiration date Exercise/conversion period Number of voting rights that may be acquired if the instrument is exercised/converted % of voting rights   Sub Total 8.B1 8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b)) Type of financial instrument Expiration date Exercise/conversion period Physical or cash settlement Number of voting rights % of voting 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. Ultimate controlling person Name of controlled undertaking % of voting rights if it equals or is higher than the notifiable threshold % of voting rights through financial instruments if it equals or is higher than the notifiable threshold Total of both if it equals or is higher than the notifiable 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 The notifier is an investment management company. The shares are beneficially owned by 10 separate funds and clients which the notifier advises regarding their investment portfolios. Shares held directly are by funds for which the notifier also acts as investment fund manager. A portion of the shares are held by certain funds for which CI Investments Inc. ("CI") is the investment fund manager and trustee, and in aggregate the CI funds hold below 5% but over 4% total voting rights. The funds and clients give a proxy to the notifier who can exercise the voting rights for the shares in its own discretion for as long as the shares are held, with no expiry date. 12. Date of Completion 29-Jan-2026 13. Place Of Completion Toronto, Ontario, Canada

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