Notice of delayed Operational Update for 9M

Nostrum Oil & Gas PLC (LSE: NOG) (“Nostrum”, or the “Company” and together with its subsidiaries, the “Group”) notifies that announcement of its operational update for the nine months ended 30 September 2026 (“9M 2026”) is planned on or around 6 November 2026.

On 16 October 2026, Nostrum announced that Nostrum Oil & Gas Finance B.V. (the “Seller”) has sold its participating interests in the charter capital of Zhaikmunai LLP and POSITIV Invest LLP, together with its rights under certain related loan agreements, to Altaris Holding Ltd. (“Altaris” or the “Buyer”), an acquisition vehicle incorporated in the Astana International Financial Centre and owned as to 51% by Alturion Holding Limited and 49% by Fincraft Energy Holding Limited.

Following the completion of the sale and purchase transaction, the preparation of the 9M 2026 financial and operational results has been delayed due to technical and administration issues. Nostrum is engaged with the Buyer and the management of Zhaikmunai LLP and POSITIV Invest LLP to streamline processes and ensure that the operational update for the 9M 2026 is announced by 6 November 2026, and that the 9M 2026 unaudited interim condensed consolidated accounts are published by 27 November 2026 as required under the Company bonds trust deed.