Hong Kong, 27 May 2026—UBS AG, acting as an exempt principal trader connected with ENN Natural Gas Co. Ltd. (the offeree in an ongoing privatisation by scheme of arrangement), reported a series of on-market hedge-related transactions in the company’s A-shares on 26 May 2026, according to a disclosure filed with the Securities and Futures Commission under Rule 22 of the Hong Kong Code on Takeovers and Mergers.

Key transaction data:

• Total purchases: 118,700 shares for approximately RMB2.32 million, executed at prices ranging from RMB19.41 to RMB19.57 per share.

• Total sales: 194,900 shares for approximately RMB3.80 million, executed at prices between RMB19.33 and RMB19.66 per share.

• Net position: A net sale of 76,200 shares, generating net proceeds of about RMB1.48 million.

All trades were conducted to hedge Delta 1 and other equity-related products created from wholly unsolicited client-driven orders. UBS AG carried out the dealings for its own account; the bank is ultimately owned by UBS Group AG.

The disclosure forms part of the regulatory monitoring process during ENN Natural Gas’s proposed privatisation, ensuring transparency around share dealings by parties connected to the transaction.