Appointment of CEO and a Non-Executive Director

Further to the announcement made on 30 June 2025, Nostrum Oil & Gas PLC (LSE: NOG) ("Nostrum" or the "Company"), an independent mixed-asset energy company with world-class gas processing facilities and export hub in north-west Kazakhstan,announces that Viktor Gladun has been appointed as Chief Executive Officer of the Company, effective 15 July 2025. Mr Gladun will remain as a director of the Company.

The Company also announces the appointment of Nikolay Ivin to the Board of Directors as a Non-Executive Director, effective 15 July 2025.

Mr Gladun is an executive with extensive experience in the energy sector. Viktor was the CEO and executive director on the board of directors of JKX Oil and Gas plc, a UK-headquartered hydrocarbon exploration company. Prior to that he held executive financial roles at DTEK vertically integrated energy group, NIKO/Mitsubishi Motor in Ukraine, a senior auditor position at TNK-BP.

Mr Ivin has broad expertise in corporate finance and management and is the Managing Partner of Ziff-Ivin Associates Ltd, a corporate finance advisory and management consulting services firm. Mr Ivin's prior professional experience includes roles at Houlihan Lokey (Europe), Citigroup EMEA and GE Capital (USA). Since 2021, Mr Ivin has also been serving as an independent supervisory board member of DTEK Energy B.V., a vertically integrated coal mining and power generating group in Ukraine.

The changes to the Board have received relevant consent in accordance with the requirements of the warrant instrument constituting the share warrants dated 9 February 2023 such that no right to exercise the warrants shall arise following these changes to the Board. The Company proposes to re-constitute the composition of the relevant committees of the Board following additional appointments of directors (so as to comply with the relevant provisions of the warrant instrument).

Stephen Whyte, Chairman of the Board said:

"I would like to welcome Nick to the Board and to congratulate Viktor on his appointment as CEO as the Company begins realising value from projects already put in place, whilst taking into account in particular the scheduled maturity of the Group's Senior Secured Notes and Senior Unsecured Notes due in June 2026."