Hong Kong, 12 June 2026 – UBS AG, an exempt principal trader connected with ENN Natural Gas Co. Ltd. (ENN Natural Gas), reported multiple on-market dealings in the company’s A shares on 11 June 2026 under Rule 22 of the Hong Kong Code on Takeovers and Mergers. The transactions were executed for UBS AG’s own account to hedge Delta 1 and other equity-related products arising from wholly unsolicited client-driven orders.

Transaction breakdown • Purchases: 641,300 shares for a combined consideration of approximately RMB 11.63 million, at prices ranging from RMB 18.04 to RMB 18.23 per share.

• Sales: 470,576 shares for a total of roughly RMB 8.53 million, at prices between RMB 18.05 and RMB 18.26 per share.

• Net position: UBS AG recorded a net purchase of 170,724 shares, representing a net cash outflow of about RMB 3.10 million on the trading day.

Context The disclosure forms part of the ongoing privatisation of ENN Natural Gas by way of a scheme of arrangement. UBS AG, ultimately owned by UBS Group AG, is classified as an exempt principal trader for the purposes of the Takeovers Code and is connected with the offeree company.

All dealings were settled in Renminbi.