Realta Fusion key facts
as of Oct 2026- Operator of an energy company intended to produce industrial heat and power from fusion energy.
- Realta Fusion is valued at approximately $105.5M as of Oct 2026, set at its early-stage round, May 2025; nothing has traded since, per PrivateMarketView’s mark.
- It has raised $54.0M across 2 recorded rounds; the latest was Early Stage VC ($35.5M) in May 2025.
- Notable investors include Alumni Ventures, Khosla Ventures, U.S. Department of Energy, Future Ventures (San Francisco), Scoop Ventures — 17 tracked in total.
- Realta Fusion has filed 2 Form Ds with the SEC since 2023, most recently May 2025 ($35.5M sold to 15 investors).
- Status: Privately Held (backing).
Valued at $105.5M at its early-stage round, May 2025. Nothing has traded since.
- ·The complete investor list: 17 names
- ·Watch Realta Fusion: the Monday email on marks, rounds and moves
Realta Fusion funding rounds
2 roundsWho backs Realta Fusion
17+Realta Fusion valuation
Realta Fusion was valued at $106 million at its early-stage round in May 2025. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.
How much has Realta Fusion raised?
Realta Fusion has raised $54 million across 2 recorded rounds since 2023. The largest was a $9 million early-stage round in May 2023; the most recent was a $35.5 million early-stage round in May 2025.
Realta Fusion has filed 2 Form Ds with the SEC since 2023, most recently in May 2025 ($35.5 million sold to 15 investors).
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.
About Realta Fusion
Operator of an energy company intended to produce industrial heat and power from fusion energy. The company applies advances in super-conducting materials, plasma physics and computing power to a simple linear fusion reactor configuration, enabling clients with a lower capex power plant, and utilizing fuel sources to provide a new, zero-carbon source of heat and power.
- Sector
- Energy
- HQ
- Madison, WI, United States
- Founded
- 2022
- Employees
- 40
- Website
- realtafusion.com/
- Ownership
- Privately Held (backing)
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