THIS ANNOUNCEMENT AND THE INFORMATION CONTAINED HEREIN IS RESTRICTED AND IS NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, IN WHOLE OR IN PART, DIRECTLY OR INDIRECTLY, IN, INTO OR FROM THE UNITED STATES, AUSTRALIA, CANADA, THE REPUBLIC OF SOUTH AFRICA, JAPAN, NEW ZEALAND OR ANY OTHER JURISDICTION IN WHICH SUCH RELEASE, PUBLICATION OR DISTRIBUTION WOULD BE UNLAWFUL.  PLEASE SEE THE IMPORTANT NOTICES AT THE END OF THIS ANNOUNCEMENT.

THIS ANNOUNCEMENT IS FOR INFORMATION PURPOSES ONLY AND DOES NOT CONSTITUTE OR CONTAIN ANY INVITATION, SOLICITATION, RECOMMENDATION, OFFER OR ADVICE TO ANY PERSON TO PURCHASE AND/OR SUBSCRIBE FOR, OTHERWISE ACQUIRE OR DISPOSE OF ANY SECURITIES IN HELIX EXPLORATION PLC OR ANY OTHER ENTITY IN ANY JURISDICTION.  NEITHER THIS ANNOUNCEMENT NOR THE FACT OF ITS DISTRIBUTION, SHALL FORM THE BASIS OF, OR BE RELIED ON IN CONNECTION WITH, ANY INVESTMENT DECISION IN RESPECT OF HELIX EXPLORATION PLC.

THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION FOR THE PURPOSES OF ARTICLE 7 OF EU REGULATION 596/2014 (WHICH FORMS PART OF DOMESTIC UK LAW PURSUANT TO THE EUROPEAN UNION (WITHDRAWAL) ACT 2018) ("UK MAR"). IN ADDITION, MARKET SOUNDINGS (AS DEFINED IN UK MAR) WERE TAKEN IN RESPECT OF CERTAIN OF THE MATTERS CONTAINED IN THIS ANNOUNCEMENT, WITH THE RESULT THAT CERTAIN PERSONS BECAME AWARE OF SUCH INSIDE INFORMATION, AS PERMITTED BY UK MAR.  UPON THE PUBLICATION OF THIS ANNOUNCEMENT, THIS INSIDE INFORMATION IS NOW CONSIDERED TO BE IN THE PUBLIC DOMAIN AND SUCH PERSONS SHALL THEREFORE CEASE TO BE IN POSSESSION OF INSIDE INFORMATION.

THIS ANNOUNCEMENT SHOULD BE READ IN ITS ENTIRETY.

05 June 2025

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

£4.5m Institutional Fundraising

Flow Test Results at Weil #1

Drilling Programme Update

Helix Exploration, the helium exploration and development company with near-term production assets within the 'Montana Helium Fairway', is pleased to announce an issue of equity raising gross proceeds of £4.5 million and an update on the results of flow testing at Weil #1 well and its wider drilling programme.

Highlights:

·      Placing and subscription (together the "Fundraising") of 28,125,000 new ordinary shares of 1 pence each ("Ordinary Shares") at a price of 16 pence per share ("New Shares"), raising gross proceeds of £4.5 million from a large private family office and other institutional investors

·      Weil #1 sustained flow rates at 2,300 thousand cubic feet per day (Mcf/d) of raw gas at 32/64" at Weil #1

·      High grade helium assayed at 1.0% helium with the balance being primarily nitrogen

·      Helix has now tested three production wells with capacity to generate pre-tax cashflow of circa twelve-million dollars a year[1] in line with projections

·      Two new production wells to be drilled, potentially allowing pre-tax cashflow of $20 million per year in the first six months of production

·      Fourth production well Inez #1 to commence mobilisation next week

·      Hannam & Partners have acted as sole bookrunner and broker in connection with the Fundraising

Bo Sears, CEO of Helix Exploration, commented:

"We are pleased to announce the successful recompletion of the Weil #1 well at the Rudyard Field in northern Montana. With this result, Helix now has three confirmed production wells - Linda #1, Darwin #1, and Weil #1 - with these three helium gas producing wells it firmly establishes the Rudyard field as a robust, near-term helium-producing field."

"Based on exceptional results to date, the Company has decided to fast-track development with a fourth and fifth production well, with Inez #1 to commence mobilisation next week.  An additional two production wells will allow for a rapid ramp up to full field production, improving overall project NPV.  This will be funded through the proceeds of the Fundraising, led by a cornerstone investment by a large private family office with over a $1 billion assets under management, underscoring Helix's stature as an institutional-grade investment opportunity."

Weil #1 Results

Helix has successfully tested the target reservoir at Weil #1 in the Souris and Red River formations.  The Weil #1 well was originally completed in 2013 with encouraging results.  Our recent recompletion mirrored the original 2013 results, testing combined flow from existing perforations at 5,076 - 5,080ft, 5,137 - 5,139ft, 5,191 - 5,193ft, 5,199 - 5,202ft and 5,261 - 5,265ft, and produced a strong commercial flow rate at >2,000 Mcf/day in line with expectations.

Following a technical issue with a bridge plug between the Souris and Red River formations which could be opened but not recovered, and in the interest of operational efficiency, Helix elected to produce from the existing perforated intervals, which demonstrated a very strong performance. 

Testing proved excellent deliverability, flowing 2,300 Mcf/d of raw gas on a 32/64" choke.  Production from the Souris formation meets the Company's baseline production forecast of 2,000 Mcf/day of raw gas.  Upside remains in extending the perforated interval within the reservoir formations and perforating potential fracture porosity between the two reservoirs.

A sample of gas was sent to Isotech Laboratories in Illinois for analysis and returned 1.0% Helium and 93.5% Nitrogen with very low levels of Methane and no water or material CO₂.  The gas mix observed is similar to gas seen at Darwin #1 and Linda #1, indicating a continuity of grade across the Rudyard closure.

With the re-completion of Weil #1 well, Helix has now demonstrated flow from three production wells.  At a conservative sustained production rate of 2,000 Mcf/day raw gas per well, consistent helium grades at 1.0% to 1.2% helium, and a helium sales price of $500/Mcf, the three wells would generate pre-tax cashflow of circa $12,000,000 per year.  The consistency of gas composition and flow rate across the three wells demonstrates the scalability of production at Rudyard and potential for expansion with additional production wells across the closure.

Inez #1 drilling

Following on from exceptional results at Linda and Weil, Helix has elected to drill a 4^th and 5^th production well, with the 4^th production well, Inez #1, targeting the extension of proven helium reservoirs in Souris and Red River formations to the south of Linda #1, and an additional 5^th production well to be drilled at a location to be determined.  Mobilisation of rig and crew to Inez #1 is targeted to commence as early as next week, with drilling expected to take approximately 10 days to reach target depth from commencement.

The additional production wells are intended to optimise ramp up to full field production by increasing cash-flow within the first 6 months of production.  Greater cash-flow will allow the Company to expand its 2026 drilling campaign and is anticipated to enable the Company to reach full-field production in one year rather than two, improving overall project economics and NPV.

All five production wells at Rudyard are expected to commence production following the installation of onsite processing equipment.  With manufacturing of the membrane module and testing of the PSA facility complete, on-site construction activities are due to commence in June 2025.

Fundraising

Helix Exploration has completed a Fundraising of 28,125,000 New Shares at a price of 16 pence per share, representing a 9.1% discount to the Company's 10-day VWAP of 17.6p and a 14.7% discount to the closing mid-market share price on 4 June 2025, raising gross proceeds of £4,500,000. The majority of the New Shares have been subscribed for by a large private family office investment firm with over $1 billion assets under management as well as other institutional investors.

The proceeds from the Fundraising will be used to fund the drilling of a 4^th and 5^th production well at Rudyard as well as providing capital for plant construction, general working capital purposes and for supporting the Company's strategic objectives of entering first helium production by the end of summer 2025 and accelerating project ramp up to full scale production.

Hannam & Partners have acted as sole bookrunner and broker in connection with the Fundraising

Admission

Application will be made to the London Stock Exchange for the New Shares to be admitted to trading on AIM ("Admission"). It is expected that Admission will become effective and that dealings in the New Shares on AIM will commence on or around 10 June 2025. The New 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 185,095,000 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.

Qualified Person Statement

The technical information contained in this disclosure has been read and approved by James Weaver, P.E., who is a qualified Petroleum Engineer and acts as the Qualified Person under the AIM Rules - Note for Mining and Oil & Gas Companies. James Weaver is the Chief Executive Officer for Aeon Petroleum Consultants Corp. which has been retained by Helix Exploration plc to provide technical support.

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 three production wells targeting up to 236ft Helium / Nitrogen gas in the Souris and Red River formations, flowing up to 3,800 Mcf/day at 1.1% helium. Rudyard field can support multiple production wells and has potential to generate net revenue of $115 - $220 million over a 12 - 14 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/.

IMPORTANT NOTICES

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.

Cairn, which is authorised and regulated in the United Kingdom by the FCA, is acting as Nominated Adviser exclusively for the Company and no one else in connection with the contents of this Announcement and will not regard any other person (whether or not a recipient of this Announcement) as its client in relation to the contents of this Announcement nor will it be responsible to anyone other than the Company for providing the protections afforded to its clients or for providing advice in relation to the contents of this Announcement. Apart from the responsibilities and liabilities, if any, which may be imposed on Cairn by the Financial Services and Markets Act 2000, as amended ("FSMA") or the regulatory regime established thereunder, Cairn accepts no responsibility whatsoever, and makes no representation or warranty, express or implied, as to the contents of this Announcement including its accuracy, completeness or verification or for any other statement made or purported to be made by it, or on behalf of it, the Company or any other person, in connection with the Company and the contents of this Announcement, whether as to the past or the future. Cairn accordingly disclaims all and any liability whatsoever, whether arising in tort, contract or otherwise (save as referred to above), which it might otherwise have in respect of the contents of this Announcement or any such statement. The responsibilities of Cairn as the Company's Nominated Adviser under the AIM Rules for Companies and the AIM Rules for Nominated Advisers are owed solely to the London Stock Exchange and are not owed to the Company or to any director or shareholder of the Company or any other person, in respect of its decision to acquire shares in the capital of the Company in reliance on any part of this Announcement, or otherwise.

Hannam & Partners, which is authorised and regulated in the United Kingdom by the FCA, is acting as  Broker and Sole Bookrunner exclusively for the Company and no one else in connection with the contents of this Announcement and will not regard any other person (whether or not a recipient of this Announcement) as its client in relation to the contents of this Announcement nor will it be responsible to anyone other than the Company for providing the protections afforded to its clients or for providing advice in relation to the contents of this Announcement. Apart from the responsibilities and liabilities, if any, which may be imposed on Hannam & Partners by FSMA or the regulatory regime established thereunder, Hannam & Partners accepts no responsibility whatsoever, and makes no representation or warranty, express or implied, as to the contents of this Announcement including its accuracy, completeness or verification or for any other statement made or purported to be made by it, or on behalf of it, the Company or any other person, in connection with the Company and the contents of this Announcement, whether as to the past or the future. Hannam & Partners accordingly disclaims all and any liability whatsoever, whether arising in tort, contract or otherwise (save as referred to above), which it might otherwise have in respect of the contents of this Announcement or any such statement.

The New Shares have not been and will not be registered under the Securities Act or with any securities regulatory authority of any state or other jurisdiction of the United States and may not be offered, sold, pledged, taken up, exercised, resold, renounced, transferred or delivered, directly or indirectly, in or into the United States absent registration under the Securities Act, except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act and in compliance with any applicable securities laws of any state or other jurisdiction of the United States. The New Shares not been approved, disapproved or recommended by the U.S. Securities and Exchange Commission, any state securities commission in the United States or any other U.S. regulatory authority, nor have any of the foregoing authorities passed upon or endorsed the merits of the offering of the New Shares. Subject to certain exceptions, the securities referred to herein may not be offered or sold in the United States, Australia, Canada, Japan, New Zealand, the Republic of South Africa or to, or for the account or benefit of, any national, resident or citizen of the United States, Australia, Canada, Japan, New Zealand or the Republic of South Africa.

 No public offering of securities is being made in the United States.

The relevant clearances have not been, nor will they be, obtained from the securities commission of any province or territory of Canada; no prospectus has been lodged with, or registered by, the Australian Securities and Investments Commission, the Financial Markets Authority of New Zealand or the Japanese Ministry of Finance; the relevant clearances have not been, and will not be, obtained from the South Africa Reserve Bank or any other applicable body in the Republic of South Africa in relation to the New Shares; and the New Shares have not been, and nor will they be, registered under or offered in compliance with the securities laws of any state, province or territory of Canada, Australia, Japan, New Zealand or the Republic of South Africa. Accordingly, the New Shares may not (unless an exemption under the relevant securities laws is applicable) be offered, sold, resold or delivered, directly or indirectly, in or into Canada, Australia, Japan, New Zealand or the Republic of South Africa or any other jurisdiction outside the United Kingdom or to, or for the account or benefit of any national, resident or citizen of Australia, Japan, New Zealand or the Republic of South Africa or to any investor located or resident in Canada.

No public offering of the New Shares is being made in the United States, United Kingdom or elsewhere. All offers of the New Shares will be made pursuant to an exemption under the EU Prospectus Regulation, or the UK Prospectus Regulation (as the case may be) from the requirement to produce a prospectus. This Announcement is being distributed to persons in the United Kingdom only in circumstances in which section 21(1) of FSMA does not apply.

 The information in this Announcement, which includes certain information drawn from public sources, does not purport to be comprehensive and has not been independently verified. This Announcement contains statements that are, or may be deemed forward-looking statements, which relate, inter alia, to the Company's proposed strategy, plans and objectives. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors beyond the control of the Company (including but not limited to future market conditions, legislative and regulatory changes, the actions of governmental regulators and changes in the political, social or economic framework in which the Company operates) that could cause the actual performance or achievements on the Company to be materially different from such forward-looking statements.

 The content of this Announcement has not been approved by an authorised person within the meaning of the FSMA. Reliance on this Announcement for the purpose of engaging in any investment activity may expose an individual to a significant risk of losing all of the property or other assets invested. The price of shares and any income expected from them may go down as well as up and investors may not get back the full amount invested upon disposal of the shares. Past performance is no guide to future performance, and persons needing advice should consult an appropriate independent financial adviser.

No prospectus will be made available in connection with the matters contained in this Announcement and no such prospectus is required (in accordance with the EU Prospectus Regulation or the UK Prospectus Regulation, as the case may be) to be published. This Announcement and the terms and conditions set out herein are for information purposes only and are directed only at persons who are: (a) persons in Member States who are Qualified Investors; and (b) in the United Kingdom, Qualified Investors who are persons who (i) have professional experience in matters relating to investments falling within the definition of "investment professionals" in article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the "Order"); (ii) are persons falling within article 49(2)(a) to (d) ("high net worth companies, unincorporated associations, etc") of the Order; or (iii) are persons to whom it may otherwise be lawfully communicated; (all such persons together being referred to as relevant persons").

This Announcement and the terms and conditions set out herein must not be acted on or relied on by persons who are not relevant persons. Persons distributing this Announcement must satisfy themselves that it is lawful to do so. Any investment or investment activity to which this Announcement and the terms and conditions set out herein relates is available only to relevant persons and will be engaged in only with relevant persons.

No representation or warranty, express or implied, is or will be made as to, or in relation to, and no responsibility or liability is or will be accepted by the Hannam & Partners, Cairn or by any of their affiliates or agents as to, or in relation to, the accuracy or completeness of this Announcement or any other written or oral information made available to or publicly available to any interested party or its advisers, and any liability therefore is expressly disclaimed.

The New Shares to be issued pursuant to the Fundraising will not be admitted to trading on any stock exchange other than AIM.

Neither the content of the Company's website nor any website accessible by hyperlinks on the Company's website is incorporated in, or forms part of, this Announcement.