A startup commercializing stellarator fusion
proximafusion.comLinkedInMunich, GermanyEnergyFounded 2023Around 200 people
LATEST ROUND
Series A
$469.9M · 2026-07-06
RAISED ON RECORD · USD
$640.2M
across 3 rounds on record
INVESTORS
28
5 leads
SOURCES
A startup commercializing stellarator fusion
proximafusion.comLinkedInMunich, GermanyEnergyFounded 2023Around 200 people
14 sources
Developing: it holds up against its sources so far, and firms up as more reporting lands.
Reported later: announced 2026-07-07 (page), first seen 2026-09-06
Publication audit: stage financing round (no Series label given): "Proxima Fusion today announced a €411 million ($468 million) financing round, bringing the company’s valuation to €2.4 billion ($2.7 billion)" (https://www.businesswire.com/news/home/20260707899566/en/Proxima-Fusion-Raises-%E2%82%AC411-Million-at-a-%E2%82%AC2.4B-Valuation-to-Build-Europes-Commercial-Fusion-Champion)
1 source
Sources agree. The source also notes that redalpine led Proxima Fusion’s seed round, but explicitly lists redalpine as participating in this Series A.
1 source
Developing: it holds up against its sources so far, and firms up as more reporting lands.
The source identifies Bayern Kapital, DeepTech & Climate Fonds, and the Max Planck Foundation as participating in the seed round. Plural, UVC Partners, High-Tech Gründerfonds, Wilbe, and TOMORROW of Visionaries Club are described as existing investors that doubled down on their pre-seed investments, so they are not counted in this round.
Publication audit: announced 2024-04-24: "Published: 2024-04-24" (https://www.eu-startups.com/2024/04/munich-based-proxima-fusion-bags-e20-million-seed-to-accelerate-timeline-to-fusion-power)
| Round | Amount | Announced | Lead | Buzz |
|---|---|---|---|---|
| Series A financing round (no Series label given) [ REPORTED LATER ]: This round was announced before Fireround first saw it. It stays in the company's history, not in Latest, Trending, or alerts. | $469.9M €691M financing total €411 million ($468 million) | 2026-07-06 | XTX Ventures, East X Ventures | No recent discussion |
14 sources [ DEVELOPING ] Developing: it holds up against its sources so far, and firms up as more reporting lands. read against 1 of 14 sources
Reported later: announced 2026-07-07 (page), first seen 2026-09-06 Publication audit: stage financing round (no Series label given): "Proxima Fusion today announced a €411 million ($468 million) financing round, bringing the company’s valuation to €2.4 billion ($2.7 billion)" (https://www.businesswire.com/news/home/20260707899566/en/Proxima-Fusion-Raises-%E2%82%AC411-Million-at-a-%E2%82%AC2.4B-Valuation-to-Build-Europes-Commercial-Fusion-Champion) | ||||
Proxima is trying to turn decades of Max Planck Wendelstein 7-X stellarator research into a commercial, steady-state fusion power plant, with Alpha intended to demonstrate net energy gain and Stellaris aimed at putting fusion electricity on the grid in the 2030s. Its €411 million 2026 financing and more-than-€650 million cumulative backing fund the shift from lab science to industrial execution across magnets, manufacturing and the Alpha demonstrator, giving Europe a heavily backed contender in strategic clean-energy technology.
| Series A [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it. | $148.6M €130 million ($150 million) | 2025-06-11 | Cherry Ventures, Balderton | No recent discussion |
1 source [ VERIFIED ] read against 1 source Sources agree. The source also notes that redalpine led Proxima Fusion’s seed round, but explicitly lists redalpine as participating in this Series A. [ BUILT WITH ]·[ SEARCH ]found by Firecrawl search·[ SCRAPE ]1 page read: businesswire.com·[ JSON ]round read into a schema, with the sentence that states it·[ VERIFY ]confirmedchecked against 1 source·[ BRANDING ]logo and colour from the homepage·[ AGENT ]company research by the Firecrawl agent | ||||
| Seed [ HISTORY ]: An earlier round, from the company's own announcement, found while researching the company. Checked like any round, but not new, so it stays out of the daily feed and alerts; a date range shows it. | $21.7M €20 million | 2024-04-24 | redalpine | No recent discussion |
1 source [ DEVELOPING ] Developing: it holds up against its sources so far, and firms up as more reporting lands. read against 1 source
The source identifies Bayern Kapital, DeepTech & Climate Fonds, and the Max Planck Foundation as participating in the seed round. Plural, UVC Partners, High-Tech Gründerfonds, Wilbe, and TOMORROW of Visionaries Club are described as existing investors that doubled down on their pre-seed investments, so they are not counted in this round. Publication audit: announced 2024-04-24: "Published: 2024-04-24" (https://www.eu-startups.com/2024/04/munich-based-proxima-fusion-bags-e20-million-seed-to-accelerate-timeline-to-fusion-power) [ BUILT WITH ]·[ SEARCH ]found by Firecrawl search·[ SCRAPE ]1 page read: eu-startups.com·[ JSON ]round read into a schema, with the sentence that states it·[ VERIFY ]correctedchecked against 1 source·[ BRANDING ]logo and colour from the homepage·[ AGENT ]company research by the Firecrawl agent | ||||
Checked against 10 sources on Sep 24
Also named as backers in company research: European Innovation Council Fund (EICF), High-Tech Gründerfonds (HTGF), Free State of Bavaria