Notice of delayed interest payments on notes

Nostrum Oil & Gas Finance B.V. (the "Issuer"), a wholly-owned subsidiary of Nostrum Oil & Gas PLC (the "Parent"), was required by 30 June 2025 to have paid accrued interest in accordance with the terms and conditions of the Issuer's outstanding notes with ISIN USN64884AF16, US66978CAF95, USN64884AE41 and US66978CAD48 (the "Notes"). The Issuer was subsequently required to have paid accrued interest on the Notes by 31 December, 2025, and such amount remains unpaid. The Notes are guaranteed by, among other entities, the Parent.

The delay is the result of the continuing payment administration issue which currently does not permit the Issuer to make a payment on the Notes through the clearing systems. The Issuer has applied for the applicable regulatory licences to make such payment. The delay in the interest payments does not reflect any issue of the Parent's or Issuer's solvency or liquidity. All underlying funds for making the interest payments are available and secured.

The Issuer has made the second consent fee payment as set out in the terms of the previously consummated consent solicitation which shall mean that no default or event of default is caused by the failure to make the interest payment on the Notes at this time. Payment of the applicable consent fees shall be made by the relevant agent to the eligible holders in the coming days.

Timing

The Parent thanks holders of the Notes for their support and participation surrounding these third party issues which have affected the interest payment due on the Notes.