Jamaica Update: Completion of Stage 1 MBES Survey

United Oil & Gas PLC / Index: AIM / Epic: UOG / Sector: Oil & Gas

16 February 2026

United Oil & Gas plc

("United" or "the Company")

Completion of Stage 1 MBES Survey - Walton-Morant Licence, Jamaica

United Oil & Gas Plc (AIM: UOG), the oil and gas company with a high impact exploration asset in Jamaica and a development asset in the UK is pleased to announce the successful completion of Stage 1 of its Surface Geochemical Exploration ("SGE") programme, comprising the multibeam echosounder ("MBES") survey, on the Walton-Morant Licence offshore Jamaica.

Highlights

· Stage 1 MBES survey phase successfully completed offshore Jamaica

· High-quality seabed bathymetry data acquired across approximately 1,189 km

· Data to support final selection of Stage 2 heat-flow and Stage 3 piston core sampling locations

· Survey vessel has recommenced offshore operations to progress the next phases of the SGE programme

Stage 1 (MBES) of the SGE programme has successfully acquired high-quality seabed bathymetry data across approximately 1,189 km on priority areas of the licence. The MBES data provide detailed definition of seabed morphology and will support the final selection of optimal locations for subsequent seabed heat-flow measurements (Stage 2) and targeted piston core sampling (Stage 3).

Following completion of the MBES phase, the survey vessel R/V Gyre returned to Kingston for equipment reconfiguration and has since departed to recommence offshore operations.

Stage 2 will comprise seabed heat-flow measurements, followed by Stage 3 targeted piston core sampling. A further update will be provided upon completion of offshore operations.

The SGE programme is designed to provide independent, basin-scale evidence of active hydrocarbon systems and will form an important input into United's ongoing technical evaluation of the Walton-Morant Licence and commercial discussions relating to the Walton-Morant Licence.

Brian Larkin, CEO of United Oil & Gas, commented:

"The successful completion of the Stage 1 MBES phase represents an important operational milestone in our Jamaica SGE programme. The quality of the bathymetry data acquired provides a robust foundation for the next stages of the survey, enabling informed selection of heat-flow and piston core locations.

As we move into Stage 2 and Stage 3, this work is designed to further de-risk the licence. We look forward to advancing offshore operations to progress through the next phase of the SGE programme."

Additional Information

A recent discussion with CEO Brian Larkin outlining progress of the SGE programme and next steps is available to view here:

https://www.youtube.com/watch?v=PDHGGdWz9pY

**ENDS**

Beaumont Cornish Limited ("Beaumont Cornish") is the Company's Nominated Adviser and is authorised and regulated by the FCA. Beaumont Cornish's responsibilities as the Company's Nominated Adviser, including a responsibility to advise and guide the Company on its responsibilities under the AIM Rules for Companies and AIM Rules for Nominated Advisers, are owed solely to the London Stock Exchange. Beaumont Cornish is not acting for and will not be responsible to any other persons for providing protections afforded to customers of Beaumont Cornish nor for advising them in relation to the proposed arrangements described in this announcement or any matter referred to in it.

Notes to Editors

United Oil & Gas is an oil and gas company with a development asset in the UK and a high impact exploration licence in Jamaica.

The business is led by an experienced management team with a strong track record of growing full cycle businesses, partnered with established industry players and is well positioned to deliver future growth through portfolio optimisation and targeted acquisitions.

United Oil & Gas is listed on the AIM market of the London Stock Exchange. For further information on United Oil and Gas please visit www.uogplc.com