One of the most intriguing venture cases of the year is brewing in Austria. The Graz-based startup Emerald Horizon, founded in 2019, is preparing for a major round of international financing that values the company at 790 million euros. This is not just another investment — it may be a turning point for the entire European nuclear energy sector.
CEO Florian Wagner confirmed to the publication Trending Topics that the company has already raised “several million euros” at the early stage and is actively negotiating with funds and strategic investors from Southeast Asia and the Middle East. According to Wagner, interest is so high that amounts “with a two-digit number of millions” are being discussed. The first part of the round, intended for Austrian investors, is already closed. The second — international — will start at the same valuation.
The 68-page investment memorandum details the company’s architecture, the strategy for bringing the technology to market, and a forecast for energy-intensive sectors that urgently need stable, zero-carbon energy sources. It is no coincidence that in recent weeks Emerald Horizon’s office has been visited by members of the Malaysian royal family, as well as delegations from the energy and investment ministries of Saudi Arabia. Their interest is understandable: mini-reactors may become an ideal solution for data centers, industrial parks, and isolated regions that require autonomous generation without dependence on fossil fuels.
Energy as a Service
Emerald Horizon is promoting an entirely new business model. The company does not sell reactors — it keeps them in its own ownership and provides clients with energy as a service (Energy-as-a-Service). The customer pays not for installation or maintenance but only for the kilowatt-hours consumed — at a price of 8–10 euro cents, while the average cost of electricity in Austria today is around 30 cents.
This approach simultaneously lowers the barrier to entry and solves the issue of trust. All modules legally belong to Emerald Horizon, which eliminates the possibility of unauthorized client actions. The company is responsible for the efficiency and lifetime of the equipment, taking on technical and operational risks.
How the next-generation reactor works
The technology is based on a thorium small modular reactor (SMR) with a controlled neutron-accelerator system. There is no critical chain reaction here, as in traditional nuclear plants. Neutrons are supplied externally and activate thorium dissolved in molten salt, heating it to 550 °C. The heat is used to generate electricity, industrial steam, or hydrogen.
The ADES system (Accelerator-Driven Energy Source):
- Particle accelerator: an injector functioning as a linear accelerator excites the thorium-232 isotope and initiates its transmutation into uranium-233.
- Reaction amplifier: fission of uranium-233 in the molten-salt loop releases energy and creates temperatures up to 900 °C.
- Heat exchanger: first- and second-stage heat exchangers transfer thermal energy either for electricity generation or for hydrogen production.
- Electricity: the tertiary loop drives a turbine that generates electricity.
- Hydrogen: if needed, the accumulated thermal energy can be used to produce hydrogen.
The main advantage is the highest level of safety: as soon as the accelerator is turned off, the reaction stops instantly. In addition, this type of reactor does not produce weapons-grade plutonium or transuranic waste, making it far more acceptable for regulatory authorities.
Engineers separately note that when using the accelerator, thallium is not formed — a substance with intense gamma radiation typical of conventional thorium systems. This is another argument in favor of the technology, on which dozens of laboratories around the world are working, though only a few are close to commercial implementation.
Material of the future
Thorium is a by-product of rare earth metal mining, often simply discarded as waste. A single 340-kilogram reactor module requires such a small amount of thorium that its impact on the raw materials market is negligible. One such module can operate for up to 20 years, providing stable energy supply without CO₂ emissions.
Emerald Horizon plans to release its first commercial product by 2030. Meanwhile, the molten-salt storage system developed within the project will reach the market earlier — in 2027 — as a standalone solution for solar energy and industrial facilities.
A partner from the top league
Emerald Horizon’s key industrial partner is VDL Groep — a Dutch technology giant with 16,000 employees, known as one of the contractors of ASML, which supplies equipment to the world’s leading microelectronics companies. Cooperation with VDL will allow the transition from prototype to industrial series and bring production to the European level of quality.
Venture context
The SMR market is currently experiencing an explosion of interest. In recent months, major investments have been secured by TerraPower ($650 million), Radiant ($165 million), Aalo Atomics ($100 million), and Valar Atomics ($130 million). However, deals still require enormous effort. “You need to talk to a hundred investors for two to agree,” Wagner admits. Nevertheless, demand for new energy sources, driven by the boom in artificial intelligence and the growth of data centers, is making precisely such projects the focus of venture capital attention.
An important factor of trust was the recent appointment of former head of the Austrian National Bank Robert Holzmann to Emerald Horizon’s board — a step that strengthened the startup’s reputation at the institutional level.
Energy built for a new era
Emerald Horizon embodies a rare example of a European deep-tech startup capable of shifting the balance of power in global energy. Its model combines scientific rigor, engineering discipline, and entrepreneurial thinking. If the company’s plans materialize, in just a few years autonomous thorium reactors will become the missing link that enables the artificial intelligence industry and the green economy to grow without the risk of energy shortages.
Company website: emerald-horizon.com
Investment opportunities can be viewed here.
