1 August 2025

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

Directorate Change

Helix Exploration, the helium exploration and development company with near-term production assets within the 'Montana Helium Fairway', is pleased to announce the appointment of Keith Spickelmier as Non-Executive Chairman, replacing David Minchin with immediate effect.

David Minchin has served as Executive Chairman of Helix Exploration since its inception in September 2023, leading the Company through its successful admission to AIM in April 2024 and advancement on the London market. He has played a key role in securing approximately £17.75 million in equity investment to support Helix's development from exploration to production. The Board extends its thanks to David for his contribution to the Company's growth, and wishes him every success in his future endeavours.

Keith Spickelmier has been appointed as independent Non-Executive Chairman to assist in guiding the Company through the next phases of its growth strategy.  Keith Spickelmier is a highly experienced energy executive with a proven track record in founding, scaling, and monetising oil and gas ventures.

Keith is the Co-Founder and Chairman of Sintana Energy Inc. (TSXV: SEI), a Canadian-listed company with strategic exposure to hydrocarbon assets in Colombia, Namibia, and Angola, and an enterprise value of approximately CAD$230 million as at the date of this announcement. Under his leadership, Sintana has raised in excess of CAD$55 million in funding and secured joint ventures with ExxonMobil in Colombia and with Chevron, GALP and others in Namibia and Angola. He also co-founded and serves as Executive Chairman of Discovery Energy, which holds a 580,000-acre license in the Cooper Basin, Southern Australia. In addition, Keith is also a Board Member of Burgundy Exploration, which has assets on the North Slope of Alaska.

In 2003, Keith founded Westside Energy Corp., growing it from inception to a successful exit in 2008 via a sale valued at approximately $200 million. Additionally, he co-founded JK Acquisition Corp., a SPAC listed on the American Stock Exchange, which raised $80 million in its initial public offering.

Keith holds a J.D. from the University of Houston and a B.A. from the University of Nebraska at Kearney. Prior to his entrepreneurial career, he practiced law for over a decade and became a partner at Verner, Liipfert, Bernhard, McPherson and Hand, providing a foundation for his disciplined approach to corporate governance and transactional structuring.

David Minchin, Departing Chairman of Helix Exploration, commented:

"Having worked with Helix since its inception in September 2023, I am proud of the growth and significant milestones we have achieved.  It is rare to take a company from IPO to production in less than 18 months and requires skill and determination as well as excellence in execution.  I would like to congratulate Bo and the team for working tirelessly to deliver cost effective exploration and development against challenging market conditions.

"The next stage of Helix's development requires new leadership with a skillset better suited to a producing company with positive cashflow and M&A opportunities.  I therefore welcome Keith to the position of Non-Executive Chairman and am confident that under his guidance the Company will continue to succeed."

Keith Spickelmier, Incoming Non-Executive Chairman of Helix Exploration, commented:

"I have served as a Non-Executive Director at Helix Exploration since IPO in April 2023 and am delighted to be taking on the position of independent Non-Executive Chairman at such an exciting and transformational time. The Company is currently in a very strong position; fully financed with supportive institutional investors, four production wells already drilled with a fifth on the way, and production plant construction commenced and going well.  I want to thank David Minchin for his work with Helix and wish him all the best in his future exploration endeavours."

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.