Horizons Clean Energy Expansion Week 2026 is a four-day conference and industry gathering in Copenhagen, Denmark, running from 24 to 27 November at the Bella Center. Formerly known as World Hydrogen Week, it has broadened its focus beyond hydrogen to examine how clean energy can contribute to energy security and wider system expansion.25
The programme is aimed at people working across the clean-energy value chain: developers, technology providers, utilities and other energy companies, industrial offtakers, contractors, consultants, government stakeholders and financiers. Organisers describe an audience spanning both upstream and downstream parts of the sector; an external event listing anticipates more than 1,000 attendees.24
Hydrogen remains a central subject, alongside power-to-X and end uses, feedstocks and fuels, carbon management and capture, resilient grids, and financing. The agenda is divided into multiple conference tracks, with sessions and activities across four days.356 The format combines conference sessions with an Intelligence Day, a hydrogen projects summit, a masterclass and site visits. The published agenda includes a tour of Port of Esbjerg, the Måde hydrogen hub and the Kassø e-methanol plant, as well as visits to Copenhagen-area facilities.6
The event’s stated theme is “Delivering Security with Clean Energy.” Its expanded remit reflects a shift from a hydrogen-focused gathering toward a broader discussion of clean-energy technologies, infrastructure and investment.25 The available sources identify S&P Global as the organiser, but do not establish when the event itself was founded.11