Startup · Sweden
Blykalla
HQ Stockholm, SwedenFounded 201351-200 employees
Blykalla is a global leader in advanced lead-cooled nuclear technology, commercializing the next generation of clean energy through its reactor, the SEALER.
Funding5 rounds · $65.0M
- Equity raised
- $65.0M
- Debt, secondaries & grants
- ~$2.6M
- Latest
- $50.0MSeries B · Dec 18, 2025
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Dec 18, 2025 | Series B | $50.0M | — | Armada Investment AG, Norrsken Launcher, Oklo | Nucleation Capital | Confirmed |
| Feb 17, 2025 | Grant | ~$2.6M | — | European Innovation Council | — | Confirmed |
| Sep 10, 2024 | Series A | $7.7M | — | 92 Ventures, Armada Investment AG | — | Confirmed |
| Apr 17, 2024 | Series A | $7.3M | — | Norrsken Launcher, Nucleation Capital | — | Confirmed |
| 2022 | Seed | Undisclosed | — | Norrsken Launcher, Uniper | — | Confirmed |
- $50.0MDec 18, 2025
- ~$2.6MFeb 17, 2025
- $7.7MSep 10, 2024
- $7.3MApr 17, 2024
- Undisclosed2022
Raised counts equity rounds; debt, secondary sales and grants are totaled separately. Amounts in other currencies are converted at the announcement month's average rate. A ~ marks an estimated or converted amount.
Systems2
Newest unveiled first. Open a system for its milestone timeline, components and sources.
Capabilities1
| Technology | Role | Maturity | TRL | Notes | Confidence |
|---|---|---|---|---|---|
| Small modular reactors | Developer | Development | — | — | Reported |
Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.
People1
- Janne Wallenius · LinkedIn ↗
Founder
Sources12
Show all 12 sources and supporting evidence
Profile3
- 1
PitchBook · Supports Organization · employee range, Organization · founded year, Organization · linkedin url, Organization · x url
“employee_range: 51-200 (profile: 140)”
- 2
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "Sweden", "hq_iso2": "SE", "id": "f383632d-53d4-4026-bf22-82c4e689c9f7"}”
- 3
LinkedIn · Supports Organization · employee range, Organization · founded year, Organization · hq city, Organization · linkedin url
“employee_range: 51-200 (profile: 51-200 employees)”
Systems1
- 4
Blykalla · Supports System
“The SEALER is a 55 MWe reactor, factory-built and shipped by road.”
Technologies1
- 5
Blykalla · Supports Organization · description, Organization · name, Organization · website, Organization technology
“Blykalla is a global leader in advanced lead-cooled nuclear technology, commercializing the next generation of clean energy through its reactor, the SEALER.”
Funding6
- 6CompanyBlykalla raises $50M to accelerate industrialization of its lead-cooled advanced reactor, the SEALER
Blykalla · Dec 18, 2025 · Supports Funding round · amount, Organization · ownership
“Blykalla has raised $50 million in capital to accelerate the industrialization and commercialization”
- 7
Blykalla · Feb 17, 2025 · Supports Funding round · amount
“consisting of a €2.5m grant and €15m in equity investment from the EU”
- 8CompanyBlykalla doubles Series A round to 160 mSEK and welcomes Chirayu Batra to its Board of Directors
Blykalla · Sep 10, 2024 · Supports Funding round, Funding round · amount
“The extension is led by Danish entrepreneur Joachim Ante’s investment firm 92 Ventures and Swiss Daniel S. Aegerter’s investment group Armada”
- 9CompanyBlykalla closes funding round of 80 mSEK for continued industrialization of its lead-cooled SMRs
Blykalla · Apr 17, 2024 · Supports Funding round, Funding round · amount
“co-led the company's seed round with Uniper in 2022”
- 10
NucNet · Apr 17, 2024 · Supports Funding round
“raising a total of about $7.3m (€6.8m)”
- 11
Nordic 9 · Supports Funding round
“Blykalla raised $50 million in a series B deal co-led by Oklo Inc, Norrsken Launcher, and ARMADA Investment”
People1
- 12
Crunchbase · Supports Organization · hq city, Organization · linkedin url, Role
“hq_city: Stockholm”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.