Radiant key facts
as of Oct 2026- Manufacturer of portable nuclear microreactor technology designed to offer a climate-friendly alternative to diesel generators.
- Radiant is valued at approximately $1.9B as of Oct 2026, set at its Series D, Dec 2025; nothing has traded since, per PrivateMarketView’s mark.
- It has raised $570.0M across 11 recorded rounds; the latest was PE Growth/Expansion in Jun 2026.
- Notable investors include Alumni Ventures, Andreessen Horowitz, U.S. Department of Energy, Founders Fund, United States Department of War — 57 tracked in total.
- PrivateMarketView tracks 2 recorded secondary trades in Radiant shares.
- Radiant has filed 2 Form Ds with the SEC since 2022, most recently Apr 2023 ($40.7M sold to 12 investors).
- Status: Privately Held (backing).
Valued at $1.9B at its Series D, Dec 2025. Nothing has traded since.
Membership and data by Private Market View
- ·Post-money valuations for 5 rounds
- ·The complete investor list: 57 names
- ·Everyone on the team, board and advisors included
- ·Watch Radiant: the Monday email on marks, rounds and moves
Radiant secondary trades
2 on record · Feb 2026 – Jun 20262 trades between Feb 2026 and Jun 2026. Exact dates, prices and structures are available to Pro members.
Membership and data by Private Market View
Radiant funding rounds
11 roundsRadiant leadership
- Douglas BernauerCo-Founder & Chief Executive Officer
- Victoria BChief Operating Officer
- Mike Starrett Ph.DChief Revenue Officer
- René BabiorDirector of Business Operations
Who backs Radiant
57+Radiant valuation
Radiant was valued at $1.9 billion at its Series D in Dec 2025. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.
How much has Radiant raised?
Radiant has raised $570 million across 11 recorded rounds since 2019. The largest was a $650,000 equity-based accelerator round in Jan 2019; the most recent was a growth round in Jun 2026. 5 of the rounds disclosed a post-money valuation.
Radiant has filed 2 Form Ds with the SEC since 2022, most recently in Apr 2023 ($40.7 million sold to 12 investors).
Radiant secondary market activity
2 secondary trades in Radiant shares are on record, between Feb 2026 and Jun 2026. Exact dates, prices and structures are available to Pro members.
Radiant investors
57 investors are on record for Radiant, including Alumni Ventures, Andreessen Horowitz, U.S. Department of Energy and Founders Fund. By type, the record holds 27 venture capital firms and 2 family offices. The growth round in Jun 2026 drew 2 investors.
Who runs Radiant
9 people are listed on the Radiant team: 7 executives and 2 board members, including Douglas Bernauer (Co-Founder) and Alessandro Palma (Chief Financial Officer). 9 of them have a verified direct contact on file.
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About Radiant
Manufacturer of portable nuclear microreactor technology designed to offer a climate-friendly alternative to diesel generators. The company's technology combines nuclear technologies with engineering techniques to accelerate development time and provide a low-cost, portable renewable power source that can be an alternative to fossil fuels, enabling clients to bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.
- Industry
- Alternative Energy Equipment
- Sector
- Energy
- HQ
- El Segundo, CA, United States
- Founded
- 2019
- Employees
- 194
- Website
- radiantnuclear.com/
- Ownership
- Privately Held (backing)
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