Nostrum Oil & Gas: Operational Update for 9M ended 30 September 2026

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FOR IMMEDIATE RELEASE

London, 6 November 2026

Operational Update for the nine months ended 30 September 2026

Nostrum Oil & Gas PLC (LSE: NOG) (“Nostrum”, or the “Company” and together with its subsidiaries, the “Group”) today announces its operational update for the nine months ended 30 September 2026 (“9M 2026”).

Viktor Gladun, Chief Executive Officer of Nostrum Oil & Gas PLC, commented:

"Up until the completion of the sale of its Kazakhstan operations, Nostrum continued to maintain strong operational resilience, disciplined financial management, and the highest standards of health, safety and environmental performance. During the 9M 2026, the Group generated approximately US$115 million revenues, which is circa 35% improvement compared to 9M 2025, and a free cashflow of over US$25 million excluding one-off items. This was achieved thanks to improved export volumes, higher product prices, and over 12% increase in average daily processed volumes.

Following the completion of the transaction on sale of Kazakhstan operations in October, Nostrum made a full redemption at par of its US$240 million Senior Secured Notes (with accrued interest) and redeemed US$417 million Senior Unsecured Notes for a cash consideration of US$170 million (following interest payment), delivering substantial value to its bondholders.

Looking ahead, our focus remains on fulfilling our obligations, maintaining financial discipline to manage the remaining cost base for the orderly managed wind-down, with a view to maximize value for our stakeholders."

9M 2026 Highlights:

Operational

Production and sales

• 13.3% increase in average daily processed volumes (i.e. Chinarevskoye and Ural Oil & Gas LLP ("Ural O&G") feedstock, including condensate tolling) to 26,724 boepd (9M 2025: 23,596 boepd). This includes a 12.8% increase in average daily titled output product volumes (i.e. Chinarevskoye production and dry gas and LPG produced from Ural O&G feedstock) to 18,383 boepd (9M 2025: 16,300 boepd). These increases were achieved through continuing to process the ramping up feedstock from Ural O&G and managing the expected decline in Chinarevskoye production through well workovers of ESP failures and flow assurance well servicing.

• The split of the titled output product volumes was as follows:

*Stabilised condensate volumes exclude Ural O&G processed volumes for which Nostrum receives a tolling fee

• 14.8% increase in average daily sales volumes to 16,455 boepd (9M 2025: 14,339 boepd). The difference between titled output product volumes and sales volumes was primarily due to the internal consumption of dry gas produced and the timing of product deliveries, which leads to inventory increases or decreases at period end.

Chinarevskoye Field

In June 2026, the Company successfully completed the planned maintenance of Gas Treatment Unit 3 within planned timeline and without cost overruns. Further planned maintenance of Oil Treatment Unit and GTU 1/2 were carried out in late September and early October.

Processing of Ural O&G products

Throughout 9M 2026, the Company continued processing raw gas and condensate volumes from Ural O&G, resulting in increased processed and titled output product volumes.

Financial

• 9M 2026 revenue is estimated at approximately US$115 million (9M 2025: US$85.5 million). The increase was mainly driven by higher export volumes, stronger Brent crude oil price and increased sales and processed volumes. The average Brent crude oil price was US$93.34/bbl in 9M 2026 (9M 2025: US$70.95/bbl).

• The Group generated a free cashflow of approximately US$26 million, excluding the security deposit of US$13.5 million received from the Buyer in accordance with the terms of the SPA.

• In June 2026, following the receipt of the applicable regulatory licence, Nostrum made interest payments in the total amount of US$25.2 million, of which US$15.6 million were funded out of DSRA.

• The unrestricted cash and cash equivalents balance as at 30 September 2026 was in excess of US$170 million (31 December 2025: US$143.3 million, 30 June 2026: US$154.4 million), excluding the security deposit of US$13.5 million received from the Buyer in accordance with the terms of the SPA.

• The Group remains focused on maximising facility uptime, controlling costs where possible and improving efficiencies across the business. At the same time, capital allocation remains disciplined and focused on preserving liquidity while assessing development opportunities across the asset base.

HSE and ESG

• Zero fatalities among employees and contractors during operations (9M 2025: zero).

• Total Recordable Incidents (incidents per million man-hours) of 2.8 (9M 2025: 0.81).

• Lost Time Injury (incidents per million man-hours) of 1.7 (9M 2025: zero)

• The safety of all employees and contractors, together with a commitment to responsible operations, remains the Group’s priority.

Key developments subsequent to 9M 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.

• On 16 October 2026, the principal paying agent effected the payment of the outstanding principal amount of the SSNs together with accrued and unpaid interest, including any default interest. The SSNs have therefore been redeemed in full and no SSNs remain outstanding.

• On 26 October 2026, Nostrum Oil & Gas Finance B.V. paid accrued interest of U.S.$ 3,018,885.76 on the Senior Unsecured Notes (the “SUNs”) and on same date Nostrum Oil & Gas B.V. ("NOG BV")) has effected the purchase of U.S.$417,523,273 in principal amount of the SUNs (the "Initial Payment") and paid a total cash amount of U.S.$170,000,000 at a price of U.S.$0.40716 per U.S.$1 in principal amount in respect of the Initial Payment. After the Initial Payment has been made, the aggregate principal amount of the SUNs that remain outstanding is U.S.$100,000,000.

Release of Nostrum’s 9M 2026 Financial Results

Nostrum plans to release its 9M 2026 unaudited interim condensed consolidated accounts on or around 27 November 2026.

LEI: 2138007VWEP4MM3J8B29

Further information

For further information please visit www.nostrumoilandgas.com

Further enquiries

Nostrum Oil & Gas PLC

Elena Zhuravleva

Chief Financial Officer

[email protected]

TEAM LEWIS

Galyna Kulachek

+ 44 (0) 20 7802 2664

[email protected]

About Nostrum Oil & Gas

Shares of Nostrum Oil & Gas PLC are listed on the London Stock Exchange (ticker symbol: NOG). On 15 October 2026, Nostrum Oil & Gas PLC completed the sale of its Kazakhstan operations, which included its 100% interest in Zhaikmunai LLP carrying out production of hydrocarbons in the Chinarevskoye oil and gas condensate field, and its 80% interest in Positiv Invest LLP, which holds the subsoil use rights for the "Kamenskoe" and "Kamensko-Teplovsko-Tokarevskoe" areas in the West Kazakhstan region (the Stepnoy Leopard fields).

Forward-Looking Statements

Some of the statements in this document are forward-looking. Forward-looking statements include statements regarding the intent, belief and current expectations of the Company or its officers with respect to various matters. When used in this document, the words “expects”, “believes”, “anticipates”, “plans”, “may”, “will”, “should” and similar expressions, and the negatives thereof, are intended to identify forward-looking statements. Such statements are not promises nor guarantees and are subject to risks and uncertainties that could cause actual outcomes to differ materially from those suggested by any such statements.

No part of this announcement constitutes, or shall be taken to constitute, an invitation or inducement to invest in the Company or any other entity, and shareholders of the Company are cautioned not to place undue reliance on the forward-looking statements. Save as required by the relevant listing rules and applicable law, the Company does not undertake to update or change any forward-looking statements to reflect events occurring after the date of this announcement.

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