JST Group Corporation Limited announced a share buy-back on 19 May 2026, purchasing 1,214,600 ordinary shares on the Hong Kong Stock Exchange.

The shares were repurchased at prices ranging between HKD 14.85 and HKD 15.48, with a volume-weighted average of HKD 15.31, for a total consideration of HKD 18.59 million. All repurchased shares have been retained as treasury shares.

Capital structure after the transaction: • Issued shares (excluding treasury shares): 430.38 million • Treasury shares: 5.89 million, equivalent to 1.35 % of total issued shares • Total issued shares (including treasury): 436.26 million (unchanged)

The latest buy-back represents 0.281 % of the company’s outstanding shares before the transaction. Since the current repurchase mandate was approved on 5 October 2025, JST Group has bought back 5.89 million shares, utilising 13.82 % of the 42.60 million-share mandate and amounting to 1.382 % of the share capital at the mandate’s approval date.

Under Hong Kong listing rules, JST Group is restricted from issuing new shares or selling treasury shares until 18 June 2026. All repurchases were executed in accordance with the Main Board Listing Rules, and no shares have been cancelled to date.