Seplat Energy Plc

("Seplat Energy" or the "Company")

Etablissements Maurel & Prom S.A. Sells 20.07% Stake in Seplat Energy to Heirs Energies Limited

Lagos and London, 2 January 2026: Seplat Energy Plc ("Seplat Energy" or the "Company"), a leading Nigerian independent energy company listed on both the Nigerian Exchange and London Stock Exchange notes the public announcement made by one of its founding investors, Etablissements Maurel & Prom S.A. ("M&P"), regarding the proposed sale of its 20.07% equity interest in Seplat Energy to Heirs Energies Ltd ("Heirs Energies"). Reference to the publication is provided below:

https://www.maureletprom.fr/en/documents/download/1844/sale-of-m-ps-20-07-interest-in-seplat-energy-to-he.

The Company will provide further updates once formal notification is received in line with regulatory requirements.

For: Seplat Energy Plc

Eleanor Adaralegbe

Chief Financial Officer

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.

Following the acquisition of Mobil Producing Nigeria Unlimited, Seplat Energy's enlarged 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) NGL recovery plant. We operate two gas processing plants onshore, at Oben in OML 4 and Sapele in OML 41, and are soon to open the 300 MMscfd ANOH Gas Processing Plant in OML 53 as a 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/