Hong Kong, 1 June 2026—The Executive of the Hong Kong Takeovers and Mergers Panel has released a Rule 22 disclosure detailing UBS AG’s trading in the ordinary shares of ENN Energy Holdings Limited on 29 May 2026. The transactions were conducted while ENN Energy is the subject of a proposed privatisation by way of scheme of arrangement.

Key points • Trading status: UBS AG is classified as an exempt principal trader connected with ENN Energy and acted on its own account. • Purpose of trades: All dealings stemmed from hedging of Delta-1 products or client-facilitation activity arising from wholly unsolicited client-driven orders. • Transaction breakdown: – Purchases: 49,996 shares for USD 2.71 million at prices between USD 54.25 and USD 54.79. – Sales: • 3,000 shares (Delta-1 hedge) for USD 0.16 million at USD 54.42. • 500 shares (client facilitation) for USD 0.03 million between USD 54.25 and USD 54.90. • 100 shares (ETF-related) for USD 0.01 million at USD 54.90.

Aggregated outcome • Total shares purchased: 49,996 • Total shares sold: 3,600 • Net position: 46,396 shares acquired • Net cash outflow: approximately USD 2.52 million

UBS AG confirmed that any resultant proprietary positions from the facilitation desk will be flattened no later than the close of the morning session on the next trading day. The disclosure forms part of ongoing reporting requirements during ENN Energy’s privatisation process.