Astral Systems
Astral Systems is a deep tech company in Bristol, United Kingdom, founded in 2021. It has raised $61.8M across 3 rounds, most recently a $26.1M Venture Round in June 2026.
Producing life-saving cancer isotopes through compact fusion technology.
- Headquarters
- Bristol
- Employees
- 11–50
- Founded
- 2021
- Business Model
- B2B
- Website
- astralsystems.co.uk
- Total Funding
- $61.8M
- Last Round
- $26.1M Venture RoundJun 2026
- Rounds
- 3
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 3 funding rounds and 1 investor for this company. The full record is or through the API.
About
Astral Systems is a Bristol-based deep tech company developing Multi-State Fusion (MSF) reactor technology to produce medical isotopes for cancer diagnosis and treatment. Its compact fusion reactors generate high-intensity neutron beams that irradiate target materials to create radioisotopes including Actinium-225 and Lead-212 — isotopes in critical short supply globally. Astral's reactors operate at Technology Readiness Level 9, with the company having generated over £3M in research contract revenue. Founded in 2021 by Talmon Firestone and Dr. Tom Wallace-Smith, the company builds on NASA's discovery of lattice confinement fusion and a decade of NSD fusion commercialization. It raised a £23M Series A in 2026 to scale production.
Summary
It lists 11–50 employees. It has raised $61.8M in total across 3 rounds, most recently a $26.1M Venture Round in Jun 2026. Investors include Mercia Asset Management.
Tech & App Stack
3 technologies & apps tracked
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Funding History
Jun 2026
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Funding: Venture Round. Amounts, valuations, and investors where available.
Investors
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