December 15, 2021

Press release

Own shares transaction

Jersey, Channel Islands, December 15, 2021 Serinus Energy plc (“Serinus“or the”Society“) (AIM: SENX, WSE: SEN) announces having repurchased on December 14, 2021, in accordance with the authorization granted by the shareholders at the Ordinary General Meeting of 2021, a total of 3,000,000 of its value ordinary shares par value of zero at an average price paid per share of 1.473 pence per share.

Following the purchase of these shares, the Company holds 3,000,000 of its ordinary shares in treasury and has 1,137,660,729 ordinary shares in circulation (excluding treasury shares).

About Serinus

Serinus is an international upstream oil and gas exploration and production company that owns and operates projects in Tunisia and Romania.

For more information, please refer to the Serinus website (www.serinusenergy.com) or contact:

Serinus Energy plc

+44 204 541 7859

Jeffrey Auld, CEO

Andrew Fairclough, Chief Financial Officer

Calvin Brackman, Vice-President, External Relations and Strategy

Arden Partners plc (Designated advisor and co-broker)

+44 207 614 5900

Paul Shackleton (Corporate Finance)

Tim Dainton (share sales)

Shore Capital Stockbrokers Limited (Co-broker)

+44 207 408 4090

Toby Gibbs / John More (business consultancy)

George Fraser (share sales)

Camarco (Financial PR – London)

+44 203 781 8334

Owen roberts

Phoebe pugh

TBT i Wspólnicy (Financial PR – Warsaw)

+48 602 214 353

Katarzyna Terej

Disclaimer

This press release may contain forward-looking statements made as of the date of this announcement regarding future activities which are not or may not be historical facts. Although the Company believes that its expectations reflected in the forward-looking statements are reasonable as of the date hereof, all potential results suggested by such statements involve risks and uncertainties and no assurance can be given that actual results will be consistent with these. forward-looking statements. statements. Various factors could hinder or prevent the Company from carrying out the activities planned on its projects, including that the Company’s projects are experiencing technical and mechanical problems, that there are changes in the prices of products, the failure of obtain regulatory approvals, the state of the national or international monetary situation, the oil and gas, financial, political and economic markets in the jurisdictions in which the Company operates and other risks not anticipated by the Company or disclosed in the documents published by the Company. Because forward-looking statements deal with future events and conditions, by their very nature they involve inherent risks and

uncertainties, and actual results may differ materially from those expressed in the forward-looking statement. The Company assumes no obligation to revise or update any forward-looking statements contained in this announcement to reflect events or circumstances after the date of this announcement, except as required by law.

Translation: This press release has been translated into Polish from the original English.