Lowercarbon
Portfolio in United States: 3 funded startups tracked by Uback, 3 of them in a ranking.
Portfolio on Uback3startups, 1 country
In a ranking3ranked by AI-estimated valuation
On the Radar0eligible, not ranked
Latest deal trackedFeb 2026Avalanche Energy
Portfolio on Uback
Sorted by Uback rank, then Radar by last round| Company | Uback | Sector | Round backed | Valuation (AI) |
|---|---|---|---|---|
| Xcimer Energy | #21 Fusion & advanced nuclear | Energy & climate › Generation › Fusion & advanced nuclear | Series A · USD 100M · Jun 2024 | Hundreds of M$ |
| Avalanche Energy | #31 Fusion & advanced nuclear | Energy & climate › Generation › Fusion & advanced nuclear | Equity round · USD 29M · Feb 2026 | Hundreds of M$ |
| Acceleron Fusion | #36 Fusion & advanced nuclear | Energy & climate › Generation › Fusion & advanced nuclear | Seed · USD 24M · Dec 2024 | Hundreds of M$ |
Only startups that meet Uback’s eligibility rules are shown. Amounts are round sizes, not the fund’s share. Rounds as reported by public sources.
By sector
Deals tracked per year
22024
02025
12026
Co-investors
Hedosophia · Breakthrough Energy Ventures · RA Capital · Founders Fund · Toyota Ventures · Collaborative Fund
Investors that joined the same rounds, as reported by public sources.
Sources. ans.org, finsmes.com, geekwire.com, xcimer.energy, as cited on each company’s profile.
Last updated: Oct 2026Report a missing dealReport an error
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