NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OF THAT JURISDICTION

London, 16 September 2025

Material related party transaction and new COO

Nostrum Oil & Gas PLC (the "Company" or "Nostrum") announces that Nostrum Oil & Gas Coöperatief UA, a wholly-owned indirect subsidiary of the Company, has today entered into an employment agreement with David Roberts, who will serve as Chief Operating Officer of the Company, reporting to the Company's Chief Executive Officer.

David has a 50% shareholding in RD Energy Caspian Holdings Limited, which holds 31,975,192 ordinary shares of Nostrum (representing 18.88% of the Company's ordinary share capital).

As a result of David's shareholding in the Company and certain other factors the employment agreement is defined as a material related party transaction under DTR 7.3.8R.

David's initial compensation under the employment agreement will be USD 396,000 per annum plus customary benefits. The employment agreement may be terminated by either party with six months' notice or immediately in certain circumstances specified in the agreement.

The Board confirms its view that entry into the employment agreement with David is fair and reasonable from the perspective of the Company and of the shareholders who are not a related party, including minority shareholders.

The Company also announces that Robert Tinkhof, who joined the Company as Chief Operating Officer on 12 February 2019, retired from that position on 3 September 2025.

Viktor Gladun, Nostrum's Chief Executive Officer, commented:

"I am delighted to welcome David to Nostrum. At the same time, I would like to thank Robert for his major contributions to the Company."

LEI: 2138007VWEP4MM3J8B29

Further information

For further information please visit www.nostrumoilandgas.com 

Further enquiries:

Nostrum Oil & Gas PLC

Thomas Hartnett - Chief Legal Officer / Company Secretary

ir@nog.co.uk

Instinctif Partners - UK                                                                                        

Galyna Kulachek

+ 44 (0) 207 457 2020

nostrum@instinctif.com

Notifying person

Thomas Hartnett

Company Secretary        

About Nostrum Oil & Gas

Nostrum Oil & Gas PLC is an independent mixed-asset energy company with world-class gas processing facilities and export hub in north-west Kazakhstan. Its shares are listed on the London Stock Exchange (ticker symbol: NOG). The principal producing asset of Nostrum Oil & Gas PLC is the Chinarevskoye field which is operated by its wholly-owned subsidiary Zhaikmunai LLP, which is the sole holder of the subsoil use rights with respect to the development of the Chinarevskoye field. The Company also owns an 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.