Form 8.5 (EPT/RI)-Treatt plc

Key Information - The exempt principal trader involved is Investec Bank plc, which is acting in a client-serving capacity for Treatt plc [1] - The date of the dealings was September 8, 2025 [1] Dealings by the Exempt Principal Trader - Investec Bank plc purchased a total of 510,111 ordinary shares at prices ranging from 262 to 270 [3] - The bank sold 458,722 ordinary shares at prices ranging from 262 to 270 [3] Other Information - There are no indemnity or option arrangements related to the relevant securities [8] - There are no agreements or understandings regarding voting rights or future acquisition or disposal of relevant securities [9]