Issue of Equity

17 August 2021

IOG plc

Issue of Equity

IOG plc ("IOG" or "the Company"), (AIM: IOG.L), the UK gas company targeting growth and high returns via an infrastructure-led hub strategy, has issued a total of 141,741 ordinary shares of 1 penny each in the capital of the Company ("Ordinary Shares"), following the exercise by a former IOG contractor of the same number of options pursuant to a Fee Sacrifice Share Option agreement (the "Exercise").

The Company has applied to the London Stock Exchange for admission of 141,741 new Ordinary Shares to trading on AIM ("Admission"). Admission is expected to occur on 20 August 2021.  Following Admission there will be 489,443,053 Ordinary Shares in issue.  Accordingly, this number may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in the Company under the FCA's Disclosure Guidance and Transparency Rules.

This announcement contains inside information for the purposes of Article 7 of the Market Abuse Regulation (EU) 596/2014 as it forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 ("MAR"), and is disclosed in accordance with the company's obligations under Article 17 of MAR.

Enquiries:

About IOG:

IOG owns and operates a 50% stake in substantial low risk, high value gas reserves in the UK Southern North Sea. IOG's 50% Joint Venture partner is CalEnergy Resources (UK) Limited (CER). The Company's Core Project targets a gross 2P peak production rate of 140 MMcfe/d (c. 24,000 Boe/d) from gross 2P gas reserves of 302 Bcfe¹ and management estimated 2C gas Contingent Resources of 132 Bcfe, via an efficient hub strategy based on co-owned infrastructure. In addition to its 2P reserves at Blythe, Elgood, Southwark, Nailsworth and Elland and 2C contingent resources at Goddard, it has management estimated gross 2C contingent resources of 23 Bcfe at Abbeydale and unrisked mid-case prospective resources of 66 Bcfe at Thornbridge, 31 Bcfe at Southsea, 31 Bcfe at Kelham, 27 Bcfe and 16 Bcfe in the two Goddard flank structures, and 21 Bcfe at Harvey. In December 2020 IOG also accepted a 50% operated stake in Licence P2589, containing the Panther and Grafton gas discoveries with management estimated gross mid-case contingent resources of 46 Bcfe and 35 Bcfe respectively. In addition IOG continues to pursue value accretive acquisitions to help generate significant shareholder returns.

¹ERC Equipoise Competent Persons Report: October 2017, adjusted by Management to account for updated project timing and compression

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