Startup · Denmark
Copenhagen Atomics
HQ Kastrup, DenmarkFounded 201451-200 employees
Copenhagen Atomics is building molten salt reactors powered by thorium, the cheapest, cleanest scalable nuclear energy. First chain-reaction planned for 2028.
Funding3 rounds
- Equity raised
- Undisclosed
- Debt, secondaries & grants
- ~$2.9M
- Latest
- ~$2.9MGrant · Jun 30, 2025
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Jun 30, 2025 | Grant | ~$2.9M | — | — | — | Reported |
| Jun 30, 2025 | Series A | Undisclosed | — | — | — | Speculative |
| Jan 6, 2023 | Series A | Undisclosed | — | — | — | Speculative |
- Grant~$2.9MJun 30, 2025
- Series ASpeculativeUndisclosedJun 30, 2025
- Series ASpeculativeUndisclosedJan 6, 2023
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.
Systems1
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 | — | Prototypes to date are non-fission; first chain reaction planned at PSI in 2028. | Reported |
- DeveloperPrototypes to date are non-fission; first chain reaction planned at PSI in 2028.DevelopmentReported
Maturity and TRL describe this organization's work; the field-wide maturity is on each technology's page.
People2
- Aslak Stubsgaard
Founder and CTO
- Thomas Jam Pedersen
Co-founder & CEO
Sources9
Profile2
- 1
Sixth-Domain · Supports Organization · country, Organization · kind
“{"country": "Denmark", "hq_iso2": "DK", "id": "1d6447c4-2b66-4906-8023-4c0311e466c9"}”
- 2
LinkedIn · Supports Organization · employee range, Organization · founded year, Organization · hq city, Organization · linkedin url
“employee_range: 51-200 (profile: 51-200 employees)”
Systems1
- 3
Copenhagen Atomics · Supports System
“Copenhagen Atomics has invented the Onion Core® technology, enabling a compact reactor that can be mass-manufactured efficiently while requiring only a small amount of materials”
Technologies1
- 4
Copenhagen Atomics · Supports Organization · description, Organization · name, Organization · website, Organization technology
“Copenhagen Atomics is building molten salt reactors powered by thorium, the cheapest, cleanest scalable nuclear energy. First chain-reaction planned for 2028.”
Funding3
- 5DatabaseCopenhagen Atomics - CB Insights
CB Insights · Supports Funding round, Organization · ownership
“6/30/2025 Grant”
- 6
PitchBook · Supports Funding round, Organization · employee range, Organization · founded year, Organization · linkedin url
“Accelerator/Inc”
- 7
Tracxn · Supports Funding round
“Jan 06, 2023”
People2
- 8
Copenhagen Atomics · Supports Role
“Thomas Jam Pedersen, Co-founder & CEO”
- 9
Copenhagen Atomics · Supports Role
“Aslak Stubsgaard Founder and CTO”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.