Proxima Fusion raises a record €411 million with backing from Google and RWE

Munich-based Proxima Fusion has raised €411 million ($468 million), the largest private funding round for fusion energy in Europe's history and a rare vote of confidence in a technology that has yet to generate a single watt of commercial power. The deal values the company at €2.4 billion.

Who joined the round

Google and German energy company RWE joined the round as strategic investors, alongside the fund XTX Ventures. Having a major tech corporation and an established energy group in the same round is an unusual combination for a fusion startup. It pairs the interest of a company for which electricity is a growing cost item with that of a player that already operates power generation and energy supply today.

• Round size: €411 million ($468 million)
• The largest private round for fusion energy in Europe's history
• Post-deal company valuation: €2.4 billion
• Strategic investors: Google and energy company RWE
• Proxima Fusion is based in Munich and is developing a stellarator-type fusion reactor

What technology Proxima Fusion specializes in

Proxima Fusion is a so-called "stellarator" company: it is developing a fusion reactor based on the stellarator design, an alternative to the more common tokamak layout. The key feature of a stellarator is the complex, twisted shape of its magnetic coils, which in theory can confine plasma more stably without having to continuously drive a current through it, as a tokamak does. At the same time, as the source notes, neither Proxima Fusion nor fusion energy as a whole has yet produced a single watt of commercial electricity; the entire sector remains at the development and demonstration stage.

What it means

A round that is a record by European standards for a fusion startup signals that major technology and energy capital is ready to make long-term bets on alternative energy sources before a working commercial reactor exists. Google's presence among the strategic investors underscores the growing interest of tech companies in their own future sources of power generation.