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

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION

FOR IMMEDIATE RELEASE

London, 30 January 2023

Scheme of Arrangement and Restructuring of the Company

Update on Restructuring - Required Licences

Nostrum Oil & Gas PLC (LSE: NOG) (the "Company" and, together with its subsidiaries, the "Group"), an independent oil and gas company engaging in the production, development and exploration of oil and gas in the pre-Caspian Basin, today provides a further update on the proposed restructuring (the "Restructuring") of the Group's US$725 million 8.0% Senior Notes due July 2022 and US$400 million 7.0% Senior Notes due February 2025, in each case issued by Nostrum Oil & Gas Finance B.V.

As previously disclosed, a condition to the Restructuring was the receipt of certain outstanding required licences from the relevant sanctions authorities (or any confirmations that such licences are not required) necessary to implement the Restructuring.

The Company announced on 9 January 2023 that it had received the requisite licence from The Office of Financial Sanctions Implementation ("OFSI"), the authority for the implementation of financial sanctions in the United Kingdom.

The Company is pleased to confirm that it has now received confirmations of authorisation from the other relevant sanctioning authorities (namely, the Dutch Ministry of Finance and the Guernsey Policy & Resources Committee), confirming that licences will not be required in these jurisdictions to implement the Restructuring.

The Company appreciates the continued support demonstrated by its stakeholders. The Company will seek to proceed with the implementation and closing of the Restructuring as soon as practicable and will provide further update on the status of the Restructuring and its implementation in due course.

Capitalised terms used but not defined in this announcement have the meaning given to them in the Explanatory Statement, which is available to the Scheme Creditors on the Scheme Portal (accessible via the Scheme Website at https://glas.agency/investor_reporting/nostrum-oil-gas-plc/).

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

Tim McCall

Galyna Kulachek

Vivian Lai

+ 44 (0) 207 457 2020

nostrum@instinctif.com

Rothschild & Co Cie.

Simon Bard

Giovanni Salvetti

+33 1 40 74 40 74

Newport.dl@rothschildandco.com

White & Case LLP

Allan Taylor (ataylor@whitecase.com)

James Greene (jgreene@whitecase.com)

Will Stoner (will.stoner@whitecase.com)

+44 (0) 207 532 1000

WCProjectNewport@whitecase.com

Notifying person

Thomas Hartnett

Company Secretary

About Nostrum Oil & Gas

Nostrum Oil & Gas PLC is an independent oil and gas company currently engaging in the production, development and exploration of oil and gas in the pre-Caspian Basin. Its shares are listed on the London Stock Exchange (ticker symbol: NOG) and the Kazakhstan Stock Exchange (ticker symbol: GB_NTRM). The principal producing asset of Nostrum Oil & Gas PLC is the Chinarevskoye field, that is being operated by a wholly-owned subsidiary of Nostrum Oil & Gas PLC - Zhaikmunai LLP, who is the sole holder of the subsoil use rights with respect to the development of the field.

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.