Please see the Full Audited Results in attached PDF

http://www.rns-pdf.londonstockexchange.com/rns/4558U_1-2026-2-26.pdf

Audited results for the year ended 31 December 2025

26 February 2026

Management Report

Lagos and London, 26 February 2026: Seplat Energy PLC ("Seplat Energy", "the Company" or " the Group"), a leading Nigerian independent energy company listed on the Nigerian and the London Stock Exchanges, announces its audited results for the twelve months ended 31 December 2025.

Operational highlights

•   Group production averaged 131,506 boepd up 148% from 2024 (52,947 boepd) reflecting the first full year of offshore consolidation, and within revised guidance. 4Q 2025 group production of 119,200 boepd, impacted by Yoho shutdown and other planned maintenance activities

•   Onshore delivered 14% production growth YoY, supported by completion of the Sapele Gas Plant, and new well inventory.

•  ANOH gas plant achieved first gas in January 2026, production is stable at 50-70 MMscfd, with ~60kbbl condensate currently in storage.

•  Emissions intensity for Seplat onshore assets: 24.3 kg CO2/boe (2024: 32.3 kg CO2/boe), down 24% YoY.

•   Offshore grew 9% YoY on a pro-forma basis,. Performance moderated by Yoho platform outage, restart expected in 2Q 2026

•  highly successful idle well restoration programme added 48.6 kboepd gross production capacity from 49 wells, exceeding expectations

•  EAP IGE was the first major project delivered offshore. Peak gross (EAP + OSO) NGL recovery of ~33 kboepd, achieved in February 2026 (2025 peak gross NGL recovery ~20 kboepd)

•   YE 2025 independently audited 2P reserves down c.42 MMboe to 1,001 MMboe (YE 2024: 1,043 MMboe), 67% liquids. Reflects 2025 focus on maintenance and integrity investments

•  Group 2P+2C increases by 181 MMBoe to 2,486.6 MMboe (YE 2024: 2,305.4 MMboe), 55% liquids. Positive revisions to offshore oil resources reflects stronger underlying production performance on multiple fields and gas resource upgrade following inclusion of Edop

•   Recorded 1 Lost Time Injury (LTI) on our operated assets in 2025. 11.4 million hours without LTI since September (2024: 11.0 million hours)

Financial highlights

•   Revenue $2,726 million up 144.2% (FY 2024: $1,116 million), reflecting a full year of contribution from offshore assets

•   Unit production operating cost of $15.7/boe down 5% on prior year (Adjusted 2024: $16.5/boe)

•   Adjusted EBITDA of $1,275.4 million, up 137% on prior year ($539.0 million)

•   Cash generated from operations of $1,165.6 million, up 276% on prior year (2024: $310.0 million)

•   Cash capex of $266.8 million (FY 2024: $208.1 million).

•   Total completion payments to Exxon Mobil $326.2 million. No MPNU contingent consideration payable to ExxonMobil for 2025

•   Balance sheet remains robust, net debt at year end 2025 of $673.3 million down 25% YoY (YE 2024: $897.8 million). Net Debt/EBITDA 0.53x

Dividend

•   4Q 2025 declared dividend of USD 8.3c/shr, up 11% QoQ and 20% YoY, consisting of USD 5.0c/shr base and USD 3.3c/shr special dividend.

•   Total dividend declared for 2025 USD 25.0c/shr, equivalent to $150 million and a 52% increase on 2024, reflecting the strength of balance sheet, strong underlying free cash flow generation and continued confidence in our outlook.

2026 Outlook & Guidance

•   Production guidance of 135-155 kboepd, mid-point represents a ~10% increase on 2025.

•  Crude & Condensate: flat YoY; new well inventory offset by planned downtime for strategic maintenance and integrity activities.

•  NGL: +85% YoY, effective 1Q 2026 with EAP complete.

•  Gas: +30% YoY, ANOH contribution, YoY growth on Sapele IGP and completion of Oso-BRT phase 1, which is on track for 3Q 2026 and targets a doubling of offshore gas sales to 240 MMScf/d gross.

•   Initial capex guidance $360-440 million. Plan includes 17 new wells (15 onshore and 2 offshore; drilling offshore from 3Q).

•   Unit production operating costs for the group are expected to be $13.5-14.5/boe. Expect volume led reduction in unit costs.

Roger Brown, Chief Executive Officer, said:

"In 2025 we clearly illustrated our ability to operate at scale. We benefitted from successful execution of several key offshore activities that kick-started life for Seplat as an offshore operator, while at the same time delivering onshore production performance that was the strongest in recent memory.

"At our CMD in September, we laid out our long-term ambition to "Build an African Energy Champion", with a clear roadmap to grow working interest production to 200 kboepd by 2030. In 2025 we delivered the IGE replacement project offshore and the Sapele Gas plant onshore. In recent weeks we were delighted to achieve first gas at the ANOH Gas Plant and are on track to doubling Joint Venture gas volumes at Oso-BRT to 240 MMscfd in 2H 2026. Drilling will be a decisive factor in meeting our long-term growth ambitions and I am pleased to announce that the first Jack-Up drilling rig is contracted, in country and set to arrive at Oso in 3Q to commence a multi-year, multi-well drilling campaign.

"Finally, the cash generative nature of our asset base is clearly evident in our results, and by raising dividends by over 50% to USD 25 cents per share alongside continued strengthening of our balance sheet and delivery of our work programmes, we are already well positioned to deliver on our planned $1 billion cumulative return of capital to shareholders by 2030. Furthermore, the strength of the enlarged group has reflected in a notable lowering of our cost of debt, providing additional scope for long-term value creation."

Summary of performance

* Comparative figures for FY 2024 which includes 19 days consolidation of Seplat Offshore has been restated to align the final PPA valuation after completion of the final details of the acquisition of MPNU during the one year measurement period as permitted by IFRS 3 (Business combinations) and as a result recognised the final fair values of assets acquired and liabilities.

** Revenue excludes underlift of $25.4 million

*** Adjusted for non-cash items

Responsibility for publication

This announcement has been authorised for publication on behalf of Seplat Energy by Eleanor Adaralegbe, Chief Financial Officer, Seplat Energy PLC.

Signed:

Eleanor Adaralegbe

Chief Financial Officer

Important notice

The information contained within this announcement is audited and deemed by the Company to constitute inside information as stipulated under Market Abuse Regulations. Upon the publication of this announcement via Regulatory Information Services, this inside information is now considered to be in the public domain.

Certain statements included in these results contain forward-looking information concerning Seplat Energy's strategy, operations, financial performance or condition, outlook, growth opportunities or circumstances in the countries, sectors, or markets in which Seplat Energy operates. By their nature, forward-looking statements involve uncertainty because they depend on future circumstances and relate to events of which not all are within Seplat Energy's control or can be predicted by Seplat Energy. Although Seplat Energy believes that the expectations and opinions reflected in such forward-looking statements are reasonable, no assurance can be given that such expectations and opinions will prove to have been correct. Actual results and market conditions could differ materially from those set out in the forward-looking statements. No part of these results constitutes, or shall be taken to constitute, an invitation or inducement to invest in Seplat Energy or any other entity and must not be relied upon in any way in connection with any investment decision. Seplat Energy undertakes no obligation to update any forward-looking statements, whether because of new information, future events or otherwise, except to the extent legally required.

Investor call

At 12:00pm GMT/ 1:00pm WAT (London / Lagos) on Thursday 26 February 2026, the Executive Management team will host a webcast to present the Company's Full Year Financial Results.

Information regarding the results presentation and webcast is detailed below.

The presentation can be accessed remotely via a live webcast link and pre-registering details are below. After the meeting, the webcast recording will be made available and access details of this recording are the same as for the webcast.

A copy of the presentation will be made available on the day of results on the Company's website at https://seplatenergy.com/.

Event title:         Seplat Energy Plc: Full Year 2025 Financial Results

Event date          12:00pm GMT/ 1:00pm WAT Thursday 26 February 2026

Webcast Live Event Link                           Webcast link

The Company requests that participants dial in 10 minutes ahead of the call. When dialling in, please follow the instructions that will be emailed to you following your registration.

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/