Scaling reliable clean energy with compact reactors built for baseload power and industrial heat

Blykalla is a Swedish company developing SEALER, a lead-cooled small modular nuclear reactor for safe, compact, firm baseload power and industrial heat. Built on 25+ years of research and founded by researchers from Sweden’s leading technical university, it uses liquid lead cooling and proprietary alloys to enable passive safety, low-pressure operation, and long operating life, suited for sites where traditional reactors aren’t a fit.
Status
Active
Founded
2013
Hq
Stockholm, Sweden
INVESTMENT year
2026
segment
Small Modular Reactors
Late-Stage Portfolio

About our Late-Stage Portfolio

This company is part of our new dedicated portfolio for late-stage opportunities. By setting aside a small part of our current fund, we can back standout European startups that are already further along than those in our core portfolio. These investments are typically smaller and more passive than our usual partnerships but equally rooted in conviction. It’s a way to diversify with mature category leaders and build new investor relationships, while staying true to our mission of helping founders build in Europe and scale globally.

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