18 August 2025

Helix Exploration PLC
("Helix Exploration" or "Helix" or the "Company")

Mobilisation of Flow Testing Equipment to Inez #1

Helix Exploration, the helium exploration and development company with near-term production assets within the 'Montana Helium Fairway', is pleased to provide an update on flow testing scheduled for Inez #1 at the Rudyard field.

Highlights:

·    Mobilisation of work-over rig and testing equipment to commence on Monday 18 August 2025.

·    Testing will commence with perforation at Inez #1 well on Tuesday 19 August 2025.

·    Testing will target helium-bearing intervals within the Lower Souris River and Red River formations.  These zones will be perforated and flow-tested to evaluate reservoir productivity and helium concentrations.

·    Testing is expected to be completed by the end of the month, with results to be announced following receipt of helium assays.  The Company will provide an update to the market in due course.

Bo Sears, CEO of Helix Exploration, commented:

"Our mandate is clear: to deliver helium production that meets growing global demand. The imminent testing of this promising helium zone at Inez #1 represents an exciting time for the Company, building on established production capacity from our drilled wells at Darwin, Linda and Weil.  Work is progressing at speed on the ground, gearing up for near term production as we enter a highly active and exciting second half of the year.

This announcement contains inside information for the purposes of the UK Market Abuse Regulation, and the Directors of the Company are responsible for the release of this announcement.

Enquiries

Helix Exploration

Cairn - Nominated Adviser

Hannam & Partners - Joint Broker

Camarco - Financial PR

Notes to Editors

Helix Exploration is a helium exploration company focused on the exploration and development of helium deposits within the 'Montana Helium Fairway'. Founded by industry experts with extensive experience of helium systems in the US, the Company listed in April 2024.

Helix is focused on production at its Rudyard Project in northern Montana, taking advantage of existing infrastructure and low-cost processing to target first gas in 2025. The Company has four production wells targeting up to 236ft Helium / Nitrogen gas in the Souris and Red River formations, flowing up to 3,800 Mcf/day at 1.2% helium. Rudyard field can support multiple production wells and has potential to generate net revenue of $115 - $220 million over a 12.5 year life of field.

Helix is committed to open and transparent communication with investors and the wider market as the project progresses through development into production.

"Our approach is simple: build scale efficiently, develop resources strategically, and deliver near-term cash flow." CEO - Bo Sears

The Company's Admission Document, and other information required pursuant to AIM Rule 26, is available on the Company's website at https://www.helixexploration.com/.

Caution regarding forward looking statements

Certain statements in this announcement, are, or may be deemed to be, forward looking statements. Forward looking statements are identified by their use of terms and phrases such as ''believe'', ''could'', "should" ''envisage'', ''estimate'', ''intend'', ''may'', ''plan'', ''potentially'', "expect", ''will'' or the negative of those, variations or comparable expressions, including references to assumptions. These forward-looking statements are not based on historical facts but rather on the Directors' current expectations and assumptions regarding the Company's future growth, results of operations, performance, future capital and other expenditures (including the amount, nature and sources of funding thereof), competitive advantages, business prospects and opportunities. Such forward looking statements reflect the Directors' current beliefs and assumptions and are based on information currently available to the Directors.