Notice of AGM

London, 6 June 2023

Publication of Annual Report and Accounts and

Notice of 2023 Annual General Meeting

Nostrum Oil & Gas PLC (LSE: NOG) ("Nostrum", or "the Company"), an independent oil and gas company engaging in the production, development and exploration of oil and gas in the pre-Caspian Basin, announces that it has published its Annual Report and Accounts for the year ended 31 December 2022 and Notice of the 2023 Annual General Meeting. Hard copy documents will be sent to shareholders who have requested to receive them.

The Company's Annual General Meeting will be held at 10:00 a.m. (BST) on 30 June 2023 at the offices of White & Case LLP at 5 Old Broad Street, London, EC2N 1DW.

Pursuant to Listing Rule 9.6.1, a copy of the Annual Report and Accounts and Notice of the 2023 Annual General Meeting have been submitted to the Financial Conduct Authority and will shortly be available for inspection on the National Storage Mechanism website at www.fca.org.uk/markets/primary-markets/regulatory-disclosures/national-storage-mechanism.

Electronic copies of the Annual Report and Accounts and the Notice of the 2023 Annual General Meeting are available on the Company's website: www.nostrumoilandgas.com and can also be accessed using the links below:

Download: https://www.nostrumoilandgas.com/investors/reports-presentations/

Download: https://www.nostrumoilandgas.com/investors/documents-circulars/#circulars

LEI: 2138007VWEP4MM3J8B29

Further information

For further information please visit www.nostrumoilandgas.com

Further enquiries

Nostrum Oil & Gas PLC

Ulugbek Makhmadiyarov - Head of Finance

ir@nog.co.uk

Instinctif Partners - UK

Tim McCall

Galyna Kulachek

Vivian Lai

+ 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 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 Astana International Exchange (ticker symbol: NOG). The principal producing asset of Nostrum Oil & Gas PLC is the Chinarevskoye field, which is operated by Zhaikmunai LLP, a wholly-owned subsidiary of Nostrum Oil & Gas PLC and the sole holder of the subsoil use rights with respect to the development of the field.