THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF THE MARKET ABUSE REGULATION (EU) 596/2014 (WHICH FORMS PART OF DOMESTIC UK LAW PURSUANT TO THE EUROPEAN UNION (WITHDRAWAL) ACT 2018 ("UK MAR").

THIS ANNOUNCEMENT AND THE INFORMATION CONTAINED HEREIN IS RESTRICTED AND IS NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, IN OR INTO, UNITED STATES OF AMERICA, AUSTRALIA, NEW ZEALAND, CANADA, JAPAN OR THE REPUBLIC OF SOUTH AFRICA OR ANY OTHER JURISDICTION WHERE, OR TO ANY OTHER PERSON TO WHOM, TO DO SO MIGHT CONSTITUTE A VIOLATION OR BREACH OF ANY APPLICABLE LAW OR REGULATION. PLEASE SEE THE IMPORTANT NOTICE AT THE END OF THIS ANNOUNCEMENT.

3 July 2026

Helix Exploration PLC

("Helix" or the "Company")

Result of Retail Offer

Helix Exploration PLC (AIM: HEX, OTCQB: HEXFF), the US based helium producer, announced on 2 July 2026 the launch of a fundraising comprising a Placing in conjunction with a Retail Offer (the "Fundraising").

The Company is pleased to announce that the Retail Offer, which was significantly oversubscribed, successfully completed and closed at 10 a.m. on 3 July 2026. As such, the Company has conditionally raised gross proceeds of approximately £1.6 million in the Retail Offer through the issue of 7,272,727 new Ordinary Shares at the Issue Price of 22 pence per share.

Following the close of the Retail Offer, the Company has conditionally raised gross proceeds of £17.6 million at the Issue Price pursuant to the Fundraising. The Company will therefore be required to issue and allot a total of 80,000,000 new Ordinary Shares to satisfy the Fundraising. In addition, the Company will issue 1,300,461 new Ordinary Shares pursuant to the TSD Acquisition and 2,023,280 new Ordinary Shares pursuant to the SPA.

Together, the 80,000,000 new Ordinary Shares to be issued pursuant to the Fundraising, the 1,300,461 new Ordinary Shares to be issued pursuant to the TSD Acquisition and the 2,023,280 new Ordinary Shares to be issued pursuant to the SPA comprise, in aggregate, 83,323,741 new Ordinary Shares (the "New Ordinary Shares").

Bo Sears, Chief Executive Officer of Helix, commented: "We are encouraged to see the demand to participate in the Retail Offer considerably exceeding capacity. We appreciate the confidence of all participants who evidently recognise the opportunity for Helix to establish an integrated position that spans the helium value chain, from reserves in the ground through to liquefaction - a combination that few independents have ever held."

Admission and Total Voting Rights

Application will be made to the London Stock Exchange for the 83,323,741 New Ordinary Shares to be admitted to trading on AIM. Admission is expected to take place and dealings in the New Ordinary Shares are expected to commence at 8.00 a.m. on or around 7 July 2026, at which time it is also expected that the New Ordinary Shares will be enabled for settlement in CREST.

Immediately following Admission, the issued share capital of the Company is expected to comprise 278,826,141 Ordinary Shares. Each Ordinary Share has one voting right and no Ordinary Shares are held in treasury. From Admission, this figure may be used by Shareholders as the denominator for the calculation 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 FCA's Disclosure Guidance and Transparency Rules.

Capitalised terms used in this announcement shall, unless defined in this announcement or unless the context provides otherwise, bear the same meaning ascribed to such terms in the launch announcement.

Enquiries:

Notes to Editors

Helix is a Montana-focused helium producer, listed on the London Stock Exchange. Its flagship Rudyard Project has rapidly evolved into Montana's first producing helium field.

Rudyard hosts three stacked helium-bearing reservoirs within a proven geological setting, with an initial four wells delivering commercial helium flow rates.

Production commenced in February 2026 through an on-site PSA processing facility, supported by established infrastructure and a helium sales agreement with a major industrial gases group.

The project benefits from shallow reservoir depths, low development costs, negligible hydrocarbons or CO₂, and significant expansion potential.

In July 2026, Helix announced the conditional acquisition of the Keyes Helium Complex in Oklahoma which would result in Helix becoming an independent helium producer that also controls liquefaction, enabling the Company to capture the full margin from wellhead to liquid delivery.

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Notes:

References to times in this Announcement are to London time unless otherwise stated.

The times and dates mentioned throughout this Announcement may be adjusted by the Company in which event the Company will make an appropriate announcement to a Regulatory Information Service giving details of any revised dates and the details of the new times and dates will be notified to London Stock Exchange plc (the "London Stock Exchange") and, where appropriate, Shareholders. Shareholders may not receive any further written communication.

IMPORTANT INFORMATION

This Announcement is not for publication or distribution, directly or indirectly, in whole or in part, in or into the United States of America. This Announcement is not an offer of securities for sale into the United States. The securities referred to herein have not been and will not be registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States, except pursuant to an applicable exemption from registration. No public offering of securities is being made in the United States.

This Announcement and the information contained herein, is restricted and is not for publication, release or distribution, directly or indirectly, in whole or in part, in or into Australia, Canada, the Republic of South Africa, Japan or any other jurisdiction in which such publication, release or distribution would be unlawful. Further, this Announcement is for information purposes only and is not an offer of securities in any jurisdiction.