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REG — Gamma Communications JPMorgan Chase & Co — Holding(s) in Company

For best results when printing this announcement, please click on link below: RNS Number: 4294V Gamma Communications PLC 18 September 2026 TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB00BQS10J50 Issuer Name GAMMA COMMUNICATIONS 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 JPMorgan Chase & Co. City of registered office (if applicable) Country of registered office (if applicable) US 4. Details of the shareholder Name City of registered office Country of registered office J.P. Morgan Securities PLC 5. Date on which the threshold was crossed or reached 16-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 2.123881 3.146800 5.270681 4698533 Position of previous notification (if applicable) N/

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For best results when printing this announcement, please click on link below: RNS Number: 4294V Gamma Communications PLC 18 September 2026 TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB00BQS10J50 Issuer Name GAMMA COMMUNICATIONS 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 JPMorgan Chase & Co.

City of registered office (if applicable) Country of registered office (if applicable) US 4. P. Morgan Securities PLC 5. Date on which the threshold was crossed or reached 16-Sep-2026 6.

Date on which Issuer notified 18-Sep-2026 7. 270681 4698533 Position of previous notification (if applicable) N/A N/A N/A 8. Notified details of the resulting situation on the date on which the threshold was crossed or reached 8A. 123881% 8B1.

B1 8B2. 146800% 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 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 JPMorgan Chase & Co.

P. Morgan SE JPMorgan Chase & Co. P. Morgan Securities LLC JPMorgan Chase & Co.

P. 264476% 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 Chain of controlled undertakings: JPMorgan Chase & Co.

P. P. P. Morgan Securities PLC (100%) JPMorgan Chase & Co.

P. P. Morgan SE (100%) JPMorgan Chase & Co. P.

Morgan Broker-Dealer Holdings Inc. P. Morgan Securities LLC (100%) 12. Date of Completion 18-Sep-2026 13.

Place Of Completion London This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. com) or visit ( ).

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