Positron Ventures
Venture capitalAmsterdam · Pre-Seed–Series A · 8 people tracked
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 · 8 people
from the firm's website & public directories
What they invest in
from 12 of 19 portfolio companiesBiotech ×5Deep Tech ×5Cleantech ×4Energy ×4Climate Tech ×3AI & Machine Learning ×2Healthtech ×2Medical Devices ×2
HQs:Netherlands×5Germany×2Switzerland×1United States×1
Investments · 19 tracked
founders shown can be your intro pathCimCure 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(Co-founder & Chief Scientific Officer)Diederik Engbersen(CEO)
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 Ostmann
aevoloop develops fully recyclable, bio-based and biodegradable polymers with heteroatom-based breaking points that enable low-energy chemical recycling into reusable building blocks.
Circular EconomyDeep TechNew MaterialsLeipzig, DE
Budget Thuis is a Dutch provider of energy (electricity and gas), internet & TV (via the KPN network), and mobile subscriptions, positioned as a low-cost alternative to established brands.
ConsumerEnergy
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
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)Johanna Winter(Co-founder & Chief Technology Officer)Hans Maria Heÿn(Co-founder & Chief Executive Officer)
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 energy storage using iron-air batteries that store renewable electricity through a reversible rusting process with abundant materials.
CleantechClimate TechEnergy
Thomsr focuses on thorium molten salt reactor technology, a nuclear energy concept originally demonstrated in the 1960s, positioning it as a clean and long-lasting energy source that can complement solar and wind.
CleantechDeep TechEnergy
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
Frequently asked questions
- 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.
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