Corporate Announcement on Board Changes.

Seplat Energy Plc ("Seplat Energy" or the "Company")

Corporate Announcement on Board Changes.

Lagos and London - 22 January 2026: Following the Company's prior announcement regarding the sale of Etablissements Maurel et Prom SA ("M&P") 20.07% shareholding in Seplat to a combination of Heirs Holdings Limited and Heirs Energies Limited, the Board of Seplat Energy today announces the resignation of Mr. Olivier Cleret De Langavant as a Non-Executive Director effective 22 January 2026. Mr. Langavant, who joined the Board on 28 January 2020 as a nominee of M&P, has rendered exceptional service throughout his tenure, providing strategic technical counsel and invaluable insights that have materially supported the Company's progress.

The Board is pleased to announce the appointment of Mr. Tony O. Elumelu, CFR as a Non-Executive Director on the Board effective 22 January 2026.  Mr. Elumelu is a distinguished African investor and philanthropist, globally recognized as one of the most prominent voices on Africa's transformation agenda. He is the Founder and Chairman of Heirs Holdings, a diversified investment company with interests across strategic sectors of the African economy, including energy, power, banking, insurance, technology, real estate, hospitality, and healthcare.

He also serves as Chairman of United Bank for Africa (UBA) Group, Heirs Energies, Transcorp Group, whose subsidiaries include Transcorp Power, and Transcorp Hotels Plc, Nigeria's foremost hospitality brand.

In 2010, he established The Tony Elumelu Foundation (TEF), the leading philanthropy dedicated to empowering African entrepreneurs across all 54 African countries. His global influence has been widely acknowledged, including recognition as one of TIME Magazine's 100 Most Influential People in the World (2020) and the conferment of the Commander of the Order of the Federal Republic (2022).

He also serves on several global boards, including UNICEF's Generation Unlimited Global Leadership Council and the International Monetary Fund's Advisory Council on Entrepreneurship and Growth.

We are confident that Mr. Elumelu's extensive experience and visionary leadership will significantly advance Seplat Energy's strategic objectives and reinforce the Company's commitment to sustainable growth and long-term success.

Please join us in expressing our deepest gratitude to Mr. Langavant for his outstanding service and welcoming Mr. Elumelu to the Board.

Mr. Udoma Udo Udoma, Chairman of Seplat Energy, commented: "On behalf of the Board and Management, I wish to express our profound appreciation to Mr. Langavant for his outstanding contribution to Seplat Energy over the past six years. His expertise and commitment have been instrumental in driving our strategic initiatives. We warmly welcome Mr. Elumelu to the Board and look forward to leveraging his wealth of experience and leadership as we continue to pursue sustainable growth and value creation for all stakeholders."

- ENDS -

For: Seplat Energy Plc

Mrs. Edith Onwuchekwa

Director Legal/Company Secretary

Enquiries:

About Seplat Energy

Seplat Energy Plc is Nigeria's leading indigenous energy company. It is listed on the Premium Board of the Nigerian Exchange Limited (NGX: SEPLAT) and the Main Market of the London Stock Exchange (LSE: SEPL). Through our strategy to Build a sustainable business and Deliver energy transition, we are transforming lives by delivering affordable, reliable and sustainable energy that drives social and economic prosperity.

Seplat Energy's portfolio consists of eleven oil and gas blocks in onshore and shallow water locations in the prolific Niger Delta region of Nigeria, which we operate with partners including the Nigerian Government and other oil producers. Furthermore, we have an operated interest in three export terminals including the Qua Iboe export terminal and Yoho FSO, as well as an operated interest in the Bonny River Terminal (BRT), and operate two large offshore NGL recovery plants at Oso and EAP.

We operate three gas processing plants onshore, at Oben in OML 4 and Sapele in OML 41 and the 300 MMscfd ANOH Gas Processing Plant in OML 53, an integrated joint venture with NGIC. Combined, these gas facilities augment Seplat Energy's position as a leading supplier of natural gas to the domestic power generation market.

For further information please refer to our website, https://www.seplatenergy.com/