Realta Fusion

Madison, WI · Founded 2022 · Privately Held (backing)

Operator of an energy company intended to produce industrial heat and power from fusion energy. Realta Fusion is based in Madison, WI and was founded in 2022. It was valued at $106 million at its early-stage round in May 2025, the last priced event on record. It has raised $54 million across 2 recorded rounds; the latest was a $35.5 million early-stage round in May 2025.

PMV mark · valuation
$105.5M
Oct 2026
Priced at
its early-stage round
May 2025
Total raised
$54.0M
Last round
Early Stage VC
May 2025

Who backs Realta Fusion?

17 investors
InvestorType
Alumni VenturesVenture capital
Khosla VenturesVenture capital
U.S. Department of EnergyOther
Future Ventures (San Francisco)Venture capital
Scoop VenturesVenture capital
TitletownTechVenture capital
AIspace Ventures—
WARF VenturesVenture capital
Rabil VenturesVenture capital
Wisconsin Alumni Research Foundation (Madison)Other
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Realta Fusion investors

17 investors are on record for Realta Fusion, including Alumni Ventures, Khosla Ventures, U.S. Department of Energy and Future Ventures (San Francisco). By type, the record holds 7 venture capital firms. The early-stage round in May 2025 drew 15 investors.

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