Uniper Sells Stake in OPAL Gas Pipeline to Hy24 for Conversion to Hydrogen Transport by 2030

On Monday, German utility Uniper agreed to transfer its 20% stake in the OPAL gas pipeline to the Paris-based investment fund Hy24, marking a structural shift for one of Europe's largest energy corridors. The transaction involves the sale of 100% of the shares in Lubmin-Brandov Assets GmbH & Co. KG, the specific entity that holds Uniper's co-ownership interest. The remaining 80% of the pipeline is held by GASCADE Gastransport GmbH, which will continue to act as the majority operator.[1][5]

The OPAL pipeline, also known as the Baltic Sea Pipeline Link, stretches approximately 470 kilometers from Lubmin in northern Germany to Brandov in the Czech Republic. Historically, the corridor possessed a capacity of up to 36 billion cubic meters of natural gas per year, serving as a critical artery for Central European energy distribution. However, the infrastructure is now being systematically repurposed to carry decarbonized molecules.[1][3]

That physical transition is already underway. The northern section of the OPAL pipeline was officially converted for hydrogen transport in mid-December 2025. Hy24 expects to complete the conversion of the southern segment by the end of 2030, a timeline that aligns with the broader rollout of Germany's hydrogen core network.[1][5]

Hy24, a joint venture formed by private equity firm Ardian and asset manager FiveT Hydrogen, is executing the purchase through its Clean Hydrogen Infrastructure Fund. "This marks Hy24's first investment in regulated transmission infrastructure, underlining its commitment to energy sovereignty, security of supply and the scaling of clean hydrogen across Europe," the firm stated following the announcement.[1]

The acquisition reflects a growing strategy among private capital markets to secure legacy fossil-fuel assets for green retrofitting. Hy24 co-founder and chief executive Pierre-Etienne Franc emphasized the geopolitical stakes of the transition. "In today's geopolitical context, strengthening Europe's access to energy and its interconnections is paramount," Franc said, noting that Germany has committed to building a robust energy backbone for the continent.[1]

For Uniper, the divestment is a regulatory mandate rather than a purely strategic pivot. The European Commission required the sale as a structural remedy when it approved a multi-billion-euro state bailout for the utility on December 20, 2022. That stabilization package was necessary to rescue Uniper after the sudden disruption of Russian gas deliveries triggered massive financial losses.[1][5]

The OPAL sale brings Uniper closer to satisfying its obligations to Brussels ahead of a strict 2026 deadline. The utility now has only two mandated asset disposals left to deliver: its helium business and a majority stake in its Russian division, Unipro. Uniper executives have previously signaled that offloading the Russian assets may prove practically impossible under current geopolitical constraints.

The pipeline transaction remains subject to standard regulatory clearances and hinges on GASCADE Gastransport GmbH choosing not to exercise its pre-emption right as the fractional co-owner. If finalized, the deal will formally link the ownership of the 470-kilometer corridor to a fund exclusively dedicated to scaling the global hydrogen economy.[5]