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, NEW ZEALAND, CANADA, THE REPUBLIC OF SOUTH AFRICA OR JAPAN 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 (AS AMENDED) (WHICH FORMS PART OF DOMESTIC UK LAW PURSUANT TO THE EUROPEAN UNION (WITHDRAWAL) ACT 2018) (AS AMENDED) ("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.

3 March 2026

Helix Exploration PLC

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

Result of Placing

Helix Exploration, the helium exploration and development company with near-term production assets within the Montana Helium Fairway, is pleased to confirm, further to the announcement made on 2 March 2026 (the "Launch Announcement"), the successful completion of the Placing at the Issue Price of 25 pence per share.

The Placing conditionally raised gross proceeds of approximately £2.2 million pursuant to the placing of 8,800,000 Placing Shares. Hannam & Partners acted as sole bookrunner and broker in connection with the Placing. The Placing was conducted by way of an accelerated book build process.

Following the deduction of associated fees and expenses, the net proceeds receivable by the Company will be used principally for:

-       Operational working capital

-       Inez re-entry & perforation

-       Corporate general and administrative expenses

Capitalised terms used in this announcement (this "Announcement") have the meanings given to them in the Launch Announcement, unless the context provides otherwise.

Fee Shares

In connection to the Placing, the Company has issued 60,000 new Ordinary Shares at the Issue Price in lieu of fees ("Fee Shares", together with the Placing Shares, the "New Shares").

Admission and Dealings

Application will be made to London Stock Exchange for the New Shares to be admitted to trading on AIM. It is currently expected that Admission of the New Shares will take place on or before 8.00 a.m. on or around 6 March 2026 and dealings in the New Shares on AIM will commence at the same time.

The Placing is conditional upon, among other things, Admission becoming effective and the Placing Agreement not being terminated in accordance with its terms.

The New Shares, when issued, will be fully paid and will rank pari passu in all respects with the existing Ordinary Shares, including the right to receive all dividends and other distributions declared, made or paid after the date of issue.

Total Voting Rights

Following admission of the New Shares, the Company's issued and fully paid share capital will consist of 195,427,400 Ordinary Shares, all of which carry one voting right per share. The Company does not hold any Ordinary Shares in treasury. Therefore, the total number of ordinary shares and voting rights in the Company will be 195,427,400. This 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 FCA's Disclosure Guidance and Transparency Rules.

This Announcement should be read in its entirety. In particular, you should read and understand the information provided in the "Important Notices" section of this Announcement.

Enquiries

Helix Exploration

Cairn - Nominated Adviser

Hannam & Partners - Sole Bookrunner and Broker

Camarco - Financial PR

IMPORTANT NOTICES

This Announcement includes statements that are, or may be deemed to be, "forward-looking statements". These forward-looking statements can be identified by the use of forward-looking terminology, including the terms "believes", "estimates", "forecasts", "plans", "prepares", "anticipates", "projects", "expects", "intends", "may", "will", "seeks", "should" or, in each case, their negative or other variations or comparable terminology, or by discussions of strategy, plans, objectives, goals, future events or intentions. These forward-looking statements include all matters that are not historical facts. They appear in a number of places throughout this Announcement and include statements regarding the Company's and the Directors' intentions, beliefs or current expectations concerning, amongst other things, the Company's prospects, growth and strategy. By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. Forward-looking statements are not guarantees of future performance. The Company's actual performance, achievements and financial condition may differ materially from those expressed or implied by the forward-looking statements in this Announcement. In addition, even if the Company's results of operations, performance, achievements and financial condition are consistent with the forward-looking statements in this Announcement, those results or developments may not be indicative of results or developments in subsequent periods. Any forward-looking statements that the Company makes in this Announcement speak only as of the date of such statement and (other than in accordance with their legal or regulatory obligations) neither the Company, nor the Broker nor Cairn nor any of their respective associates, directors, officers or advisers shall be obliged to update such statements. Comparisons of results for current and any prior periods are not intended to express any future trends or indications of future performance, unless expressed as such, and should only be viewed as historical data.

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 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 Placing 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 Placing 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 Placing 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 Placing Shares; and the Placing 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 Placing 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 Placing Shares is being made in the United States, United Kingdom or elsewhere. All offers of the Placing Shares will be made pursuant to an exemption under the Regulation (EU) 2017/1129 ("EU Prospectus Regulation"), or under Part 1 of Schedule 1 of the Public Offers and Admissions to Trading Regulations 2024 (the "POATR"), as the case may be, which does not result in any requirement for the publication of a prospectus or contravene regulation 12 of POATR. This Announcement is being distributed to persons in the United Kingdom only in circumstances in which section 21(1) of FSMA, as amended, 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 POATR, 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 ("Member States") of the European Economic Area ("EEA") who are qualified investors as defined in article 2(e) of Prospectus Regulation (EU) 2017/1129; and (b) in the United Kingdom, qualified investors as defined in paragraph 15 of Schedule 1 to the POATR 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 Broker, 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.

No statement in this Announcement is intended to be a profit forecast or estimate, and no statement in this Announcement should be interpreted to mean that earnings per share of the Company for the current or future financial years would necessarily match or exceed the historical published earnings per share of the Company.

The Placing Shares to be issued pursuant to the Placing 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.

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. 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/.