Hong Kong, 21 May 2026—Pursuant to Rule 22 of the Hong Kong Code on Takeovers and Mergers, UBS AG has reported client-driven Delta 1 hedging transactions in the A-shares of ENN Natural Gas Co. Ltd., which is currently subject to a proposed privatisation by way of scheme of arrangement.

On 20 May 2026, UBS AG—an exempt principal trader connected with the offeree—executed the following on its own account:

• Purchases: 329,600 shares for a total consideration of RMB 6.90 million, executed between RMB 20.75 and RMB 21.11 per share.

• Sales: 182,100 shares for proceeds of RMB 3.81 million, executed between RMB 20.64 and RMB 21.11 per share.

The dealings translate into a net purchase of 147,500 shares and a net cash outflow of approximately RMB 3.09 million. UBS AG is ultimately owned by UBS Group AG.

The disclosure forms part of ongoing reporting requirements during the privatisation process of ENN Natural Gas. All figures refer to trades in the company’s A-shares and are stated in renminbi.