Appointment of Chief Executive Officer

5 September 2025 - Tullow Oil plc (Tullow) is pleased to announce the appointment of Ian Perks as Tullow's new Chief Executive Officer (CEO).

Ian will take up the role of CEO and join the Board on 15 September 2025. Following the appointment, Richard Miller, who is currently Chief Financial Officer (CFO) and Interim CEO, will return to his role as CFO.

Ian has over 30 years of experience in the upstream oil and gas business and has worked extensively in Africa and other international locations. He has held senior roles at BG Group, Anadarko and Total covering all aspects of the industry.

As Senior Vice President for Mozambique Liquified Natural Gas (LNG) at Anadarko and later at Total, he successfully engaged with the Government of Mozambique to lead the $20 billion Mozambique LNG project to a Final Investment Decision.

Prior to Anadarko, Ian led numerous divisions of BG Group, establishing a track record of successfully delivering multi-billion-dollar projects, reducing costs and growing profitability. He oversaw the delivery and subsequent operations of the $10 billion Queensland Gas Company (QGCLNG) Project, safely, on schedule and within budget.

As President of BG Tunisia, he led the business to deliver industry leading safety performance, maximising production and reducing costs, whilst successfully delivering the $1 billion Hasdrubal gas project. Ian also helped oversee tremendous growth of BG's business in Trinidad and Tobago, as profit doubled between 2002-05.

Ian holds a Bachelor of Science in Economics from Loughborough University.

Phuthuma Nhleko, Chairman of Tullow Oil Plc, said: "I am delighted to welcome Ian to Tullow as CEO. He brings a wealth of industry and African knowledge and experience and has a track record of successfully managing large multi-stakeholder businesses and projects. I would like to take this opportunity to thank Richard Miller for stepping into the role of Interim CEO and congratulate him on the considerable progress made during that time. I look forward to working with Ian and Richard."

Ian Perks, Chief Executive Officer - Designate of Tullow Oil Plc, also commented today: "I am pleased to join Tullow at this pivotal time for the Company. My near term priority will be to work with Richard, the Tullow team and our stakeholders to put the Company on a long-term sustainable financial footing. We will then have an opportunity to grow the Company across Africa, leveraging our current assets and reputation on the continent of Africa to add value for our stakeholders."

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There are no further disclosures required for the purposes of UKLR 6.4.6R and UKLR 6.4.8R.