Proxima Fusion: Funding, Investors & Team (Sep 2026)
Proxima Fusion specializes in developing fusion power plants using quasi-isodynamic stellarator technology, and is dedicated to finding innovative solutions for sustainable energy production through nuclear fusion. Their research focuses on harnessing the clean and abundant energy potential of fusion, with an emphasis on improving the stability and efficiency of fusion reactions. Proxima Fusion works with industry partners to encourage the adoption of fusion technology and support the global shift towards renewable energy sources, aiming to make fusion energy a viable option for future power generation.
Proxima Fusion has raised $636M across 3 funding rounds on record, the most recent a Series B of $470M announced in Jul 2026.
That round is above the $15M median round size for Energy companies tracked on FundedIQ over the last two years.
Proxima Fusion Company Profile and Key Stats
Latest funding round on record: Jul 2026.
Proxima Fusion Funding Rounds
Proxima Fusion raised $148M in a Series A announced in Jun 2025.
3 months later, a Series A of $17.6M was announced in Sep 2025.
10 months later, a Series B of $470M was announced in Jul 2026.
Proxima Fusion Investors
32 investors are recorded in total; the 5 named above are those the record identifies.
Proxima Fusion Founders and Leadership Team
Contact details for the Proxima Fusion team: 2 of 3 have an email address on file, 1 has a LinkedIn profile.
Start 14-day free trial →Proxima Fusion Funding Compared to Other Energy Startups
Proxima Fusion's latest round of $470M is above the median round in Energy. Medians cover the last 24 months of disclosed rounds.
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Proxima Fusion Funding FAQs
What does Proxima Fusion do?
Proxima Fusion specializes in developing fusion power plants using quasi-isodynamic stellarator technology, and is dedicated to finding innovative solutions for sustainable energy production through nuclear fusion. Their research focuses on harnessing the clean and abundant energy potential of fusion, with an emphasis on improving the stability and efficiency of fusion reactions. Proxima Fusion works with industry partners to encourage the adoption of fusion technology and support the global shift towards renewable energy sources, aiming to make fusion energy a viable option for future power generation.
How much funding has Proxima Fusion raised?
Proxima Fusion has raised $636M across 3 rounds on record. The most recent is a Series B of $470M announced in Jul 2026.
When did Proxima Fusion last raise funding?
Proxima Fusion's most recent funding round on record is a Series B of $470M, announced in Jul 2026.
Who has invested in Proxima Fusion?
Investors on record for Proxima Fusion include Lightspeed Venture Partners, HTGF (High-Tech Gruenderfonds), Cherry Ventures, Balderton Capital, CDP Venture Capital. FundedIQ records 32 investors in total.
Who founded Proxima Fusion?
FundedIQ lists Jonathan (Co-Founder and Head of Labs), Martin Kubie (Founder) at Proxima Fusion.
Where is Proxima Fusion headquartered?
Proxima Fusion is based in Munich, Bayern, Germany.
How many employees does Proxima Fusion have?
Proxima Fusion is in the 51-100 employee band.
When was Proxima Fusion founded?
Proxima Fusion was founded in 2023.
How does Proxima Fusion's funding compare to other Energy startups?
Proxima Fusion's latest round of $470M is above the $15M median round size for Energy companies on FundedIQ across 2,284 tracked companies over the last two years.
About FundedIQ's Proxima Fusion Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for Proxima Fusion is left off this page rather than filled in.
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