Positron Ventures

Established in 2022, Positron Ventures is a Dutch venture capital firm headquartered in Amsterdam. It focuses on investing in life science and technology startups with the potential to drive significant advancements in environmental sustainability or health.

Joseph Peeraer

Founding Partner

Past deals in Lyon

Thorizon

Series A in 2025
Thorizon is a deep-tech startup spun off from the Dutch Nuclear Research Institute, with offices in Amsterdam and Lyon. It is developing thorium molten salt reactor technology designed to provide a responsible, carbon-free energy source by using long-lived nuclear waste and thorium as fuel, with a focus on safety and circularity. The company aims to deliver a scalable demonstration and to begin constructing a first-of-a-kind reactor by 2030, named Thorizon One. It collaborates with industry leaders including Orano, Tractebel, and EDF and has been recognized as a laureate in the France 2030 program for advanced nuclear projects.

Thorizon

Venture Round in 2022
Thorizon is a deep-tech startup spun off from the Dutch Nuclear Research Institute, with offices in Amsterdam and Lyon. It is developing thorium molten salt reactor technology designed to provide a responsible, carbon-free energy source by using long-lived nuclear waste and thorium as fuel, with a focus on safety and circularity. The company aims to deliver a scalable demonstration and to begin constructing a first-of-a-kind reactor by 2030, named Thorizon One. It collaborates with industry leaders including Orano, Tractebel, and EDF and has been recognized as a laureate in the France 2030 program for advanced nuclear projects.

Thorizon

Pre Seed Round in 2021
Thorizon is a deep-tech startup spun off from the Dutch Nuclear Research Institute, with offices in Amsterdam and Lyon. It is developing thorium molten salt reactor technology designed to provide a responsible, carbon-free energy source by using long-lived nuclear waste and thorium as fuel, with a focus on safety and circularity. The company aims to deliver a scalable demonstration and to begin constructing a first-of-a-kind reactor by 2030, named Thorizon One. It collaborates with industry leaders including Orano, Tractebel, and EDF and has been recognized as a laureate in the France 2030 program for advanced nuclear projects.
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