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REG — Victrex PLC — Holding(s) in Company

For best results when printing this announcement, please click on link below: RNS Number: 4373V Victrex PLC 18 September 2026 TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB0009292243 Issuer Name VICTREX 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 Norges Bank City of registered office (if applicable) Oslo Country of registered office (if applicable) Norway 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 17-Sep-2026 6. Date on which Issuer notified 18-Sep-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 8.81165

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For best results when printing this announcement, please click on link below: RNS Number: 4373V Victrex PLC 18 September 2026 TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB0009292243 Issuer Name VICTREX 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 Norges Bank City of registered office (if applicable) Oslo Country of registered office (if applicable) Norway 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 17-Sep-2026 6. Date on which Issuer notified 18-Sep-2026 7. 182210 8.

Notified details of the resulting situation on the date on which the threshold was crossed or reached 8A. 811650% 8B1. 367260% 8B2. 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 Total of both if it equals or is higher than the notifiable threshold 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 If date does not apply, explain below 11. Additional Information 12. Date of Completion 18-Sep-2026 13. Place Of Completion Oslo, Norway This information is provided by RNS, the news service of the London Stock Exchange.

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