Fluxys affiliate GMSL will join forces with Energy One Ltd

Brussels-Sydney, 19 August 2026 – Energy One Limited (ASX:EOL) and Fluxys today announce that they have entered into a Share Purchase Agreement under which Energy One will acquire 100% of Fluxys’ UK-based affiliate GMSL and where Fluxys becomes a strategic shareholder of 18.26% of Energy One.

The proposed transaction represents a significant milestone in Energy One's growth strategy. By bringing together complementary software, connectivity, market operations and 24/7 operational services capabilities, the combination strengthens Energy One's position in Europe, expands its customer reach and accelerates its long-term growth ambitions. Together, Energy One and GMSL will create a broader software and services platform with greater scale, expertise and market coverage across European energy markets.

Fluxys, owner of GMSL since 2002, will remain closely aligned as a major shareholder and key customer of Energy One’s, with an ownership interest of 18.26%. The transaction is subject to shareholder approvals and completion conditions and is expected to be completed before year end.

Ben Tranier, Chief Executive Officer of Energy One "GMSL is the leading provider of European energy market software, 24/7 operational services and market connectivity solutions. This partnership is an important step in the continued growth of Energy One's European business.

Welcoming GMSL into the Energy One Group expands our capability across energy trading, market operations and connectivity. Together, the two businesses will be even better positioned to support customers operating in increasingly complex gas and power markets.

We see significant opportunity in bringing together the complementary strengths, expertise and experience of both organisations to create a broader software and services platform for energy markets. Our priority will be to maintain service quality, support our customers and preserve the expertise, culture and customer focus that have made both businesses successful.

This is the largest transaction in Energy One's history and an important milestone in the evolution and continued growth of the Group. We are also pleased to welcome Fluxys as a significant shareholder and long-term strategic partner, supporting the next phase of Energy One's growth in Europe.”

Pascal De Buck, Managing Director & CEO Fluxys “Joining forces with Energy One is a unique opportunity for both GMSL and for Fluxys. By combining GMSL’s expertise and product suite with Energy One’s integrated solutions, we are well positioned to meet the growing software and services challenges across the gas, power, and renewables markets – globally.

As Fluxys becomes a strategic anchor shareholder of Energy One, we are making a clear, long-term commitment to support and accelerate Energy One’s and GMSL’s growth.”

George Wych, COO GMSL “Having been part of GMSL’s journey from its early days over the past 30 years, I see this moment as an exciting new chapter. By bringing our business together with Energy One, we are creating a strong organisation with broader capabilities. It will open new opportunities for our customers, our people and our partners.

The continued participation of Fluxys also underscores the belief in the future of the combined company. I am incredibly proud of what we have built together, and even more optimistic about what we will achieve in the years ahead.”

Fluxys Press contact

Fluxys Press team: +32 2 282 74 44 • press@fluxys.com

Energy One Press contact

Energy One Limited: media@energyone.com

About Energy One Limited

Energy One Limited (ASX:EOL) is a global provider of wholesale energy trading software and operational services to the gas and power industries. Supporting more than 500 customers and over 2,000 users across 30+ countries, Energy One helps organisations manage risk, optimise trading performance and operate in complex energy markets. The Group employs more than 210 people across Australia, the United Kingdom, France and Belgium.

Energy One's software and services support the full wholesale energy trading lifecycle, including energy trading and risk management, market operations, connectivity, automation, compliance and 24/7 operational support. Combining innovative technology with dedicated industry expertise, Energy One provides market participants with the tools and operational capability required to participate confidently in gas and power markets.

Energy One's vision is to be the world's leading provider of wholesale energy trading software and services.

www.energyone.com

About Fluxys

Headquartered in Belgium, Fluxys is a fully independent infrastructure group with 1,500 employees active in gas transmission & storage and liquefied natural gas terminalling. Through its associated companies across the world, Fluxys operates 28,000 kilometres of pipeline and liquefied natural gas terminals totalling a yearly regasification capacity of 485 TWh. Among Fluxys’ subsidiaries is Euronext listed Fluxys Belgium, owner and operator of the infrastructure for gas transmission & storage and liquefied natural gas terminalling in Belgium.

As a purpose-led company, Fluxys together with its stakeholders contributes to a better society by shaping a bright energy future. Building on the unique assets of its infrastructure and its commercial and technical expertise, Fluxys is committed to transporting hydrogen, biomethane or any other carbon-neutral energy carrier as well as CO₂, accommodating the capture, usage and storage of the latter.

www.fluxys.com

About GMSL

GMSL, headquartered in Cambridge and a wholly owned subsidiary of Fluxys, delivers specialist operations services and software to the European gas and power industry. Backed by over 30 years of experience, the company supports more than 100 clients across 25+ markets. GMSL combines a highly experienced 24/7 operations team with industry-focused software developed in-house, enabling the delivery of reliable, efficient and high-quality operations across Europe’s energy networks. The company employs over 120 professionals across its offices in Cambridge and Birmingham.

www.gmsl.co.uk