Exercise of Options

21 October 2026

Helix Exploration PLC

("Helix" or the "Company")

Exercise of Options

Helix Exploration PLC (AIM: HEX, OTCQB: HEXFF), the US-focused helium producer and liquefier, announces that it has received notification for the exercise of options over 1,000,000 new ordinary shares in the Company at an exercise price of 10 pence per share (the "Option Shares") providing the Company with proceeds of £100,000.

Admission

Application will be made to the London Stock Exchange for the Option Shares to be admitted to trading on AIM ("Admission"). It is expected that Admission will become effective and that dealings in the Option Shares on AIM will commence on or around 26 October 2026. The Option Shares will rank pari passu with the existing ordinary shares.

Total Voting Rights

For the purpose of the Disclosure and Transparency Rules, following Admission, the enlarged issued share capital of the Company will comprise 281,626,141 ordinary shares. The Company does not hold any shares in treasury. The above figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company, under the Disclosure and Transparency Rules.

The Directors of the Company are responsible for the release of this announcement.

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About Helix

From explorer to integrated US helium producer in just over two years.

Helix Exploration PLC (LSE: HEX) is a US-focused helium producer and liquefier building an integrated position across the helium value chain. Its flagship Rudyard Project in Montana commenced production in February 2026, with first commercial sales in July 2026. Following approval from the Montana Board of Oil and Gas Conservation on 15 October 2026, production has restarted after the regulatory pause announced on 3 September 2026.

Helix is now expanding Rudyard through a drilling and processing capacity programme, supported by its own drilling rig, while the July 2026 acquisition of the Keyes Helium Complex in Oklahoma provides ownership of one of only six operational helium liquefaction facilities in the United States.

The combination of producing helium resources, owned drilling capability and liquefaction infrastructure gives Helix unique control across the value chain and creates multiple avenues for growth, including increased production, third-party processing and liquefaction.

Helix is focused on scaling a vertically integrated helium business positioned to serve the growing North American and global markets.

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