Positron Ventures
Venture capitalAmsterdam · Pre-Seed–Series A · 7 people tracked
Find your way into Positron Ventures
2,654 people in our graph share verified history with the Positron Ventures team — schools, employers, funds. One of them is your warm intro.
Investment thesis
Positron invests in outstanding scientist-entrepreneurs across the natural sciences, backing teams from day one as they pursue solutions to major global challenges. The firm frequently acts as the first believer and first investor in a venture, writing initial checks for founders building science-based companies or spinning out research. Beyond capital, Positron offers hands-on support across all aspects of company building, drawing on its team's operating and scientific backgrounds. It targets deep-tech and natural-science ventures at their earliest stage.
Source: firm website, verified Aug 7, 2026.
Team · 7 people
from the firm's website & public directories
What they invest in
from 13 of 18 portfolio companiesDeep Tech ×7Cleantech ×6Biotech ×5Climate Tech ×5Energy ×5AI & Machine Learning ×2Healthtech ×2Medical Devices ×2
HQs:Netherlands×6Germany×2Switzerland×1France×1United States×1
Investments · 18 tracked
founders shown can be your intro path
CimCure develops active cancer vaccines that use its proprietary Immune-Boost (iBoost) technology to prompt the body to produce antibodies that attack and destroy the blood vessels feeding solid tumours, stopping cancer growth.
BiotechHealthtechMedical DevicesAmsterdam, NL
Arjan Griffioen(CSO)inDiederik Engbersen(CEO)in
CellX Biosolutions develops a biological method that uses bacteria to break down PFAS ("forever chemicals"), positioned as an alternative to conventional disposal methods.
BiotechCleantechClimate Tech
Estelle Clerc(Founder)in
Co-investorsKickfund
CollimateHealth develops a clinically scalable microbeam radiation technology for cancer treatment, delivering arrays of narrow, micrometer-scale radiation beams at higher doses than conventional broad-beam radiation oncology.
BiotechHealthtechMedical Devices
Stefan Bartzsch(Co-founder & Chief Scientific Officer)inJohanna Winter(Co-founder & Chief Technology Officer)inHans Maria Heÿn(Co-founder & Chief Executive Officer)in
I amsterdam is a city guide for Amsterdam offering an events calendar, tips for activities, restaurant and neighborhood recommendations, and a cultural newsletter.
Media & EntertainmentTravel & HospitalityAmsterdam, NL
Ore Energy develops long-duration iron-air battery technology for renewable energy storage using cost-effective, recyclable materials like iron, water, and air.
CleantechClimate TechDeep TechEnergy
Oshima is a metascience company building a new way to represent scientific literature, breaking research papers into claims, experiments, and evidence rather than treating papers as the base unit of knowledge.
AI & Machine LearningDeep TechSaaS
BoardCarla Ostmannin
Renaissance Fusion develops fusion energy technology in Grenoble, France, focusing on high-temperature superconductors and liquid metal technologies to create clean, abundant energy.
CleantechClimate TechDeep TechEnergyGrenoble, FR
Francesco Volpe(Co-founder)inMartin Kupp(Co-founder)in
Co-investorsLowercarbon CapitalBpifranceExcellis HoldingHCVCJuniperLOWERCARBON+2 more
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A foundation providing educational information about molten salt reactors and thorium technology as potential solutions for fossil-fuel-free energy transition.
CleantechClimate TechDeep TechEnergy
BoardGijs Zwartsenberg(Chair)K. Bos(Secretary)S. Barlag(Treasurer)
Undermind provides AI-powered research discovery tools that help R&D teams find relevant scientific papers and research quickly.
AI & Machine LearningBiotechDeep TechEnterprise SoftwareSan Francisco, US
Joshua Ramette(Founder)inTom Hartke(Founder)in
Co-investorsUnpopular VenturesY Combinator
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Institut d’OptiquemergerPASQALQu&Co
Portfolio news
latest coverage across their companiesFrequently asked questions
- How many investments has Positron Ventures made?
- Positron Ventures has 18 tracked investments.
- What stage does Positron Ventures invest at?
- Positron Ventures invests at the Pre-Seed, Seed, Series A stages.
- What sectors does Positron Ventures focus on?
- Positron Ventures focuses on AgTech, Biotech, Cleantech, Deep Tech, Energy, FoodTech, Hardware, New Materials, SaaS.
- Where is Positron Ventures located?
- Positron Ventures is headquartered in Amsterdam, NL.
- Who does Positron Ventures co-invest with?
- Positron Ventures most often shares deals with Runa Capital, Excellis Holding, HCVC, among 11 tracked co-investors.
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