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Co-reactive's technology converts CO2 into solid carbonate that can be used as a partial replacement material for cement. Ideally, the CO2 output of a cement factory is used as input.

I invested in a CLA in May 2024.

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Mitico (fka C-Quester, a Caltech spinout) offers industrial point source emitters an end-to-end solution for carbon capture at a fraction of the cost associated with existing technologies, thanks to a lower temperature swing.

I invested in a SAFE in May 2024.

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HyperHeat develops an industrial electric heating element that can deliver up to 2000 deg. C heated air, with near zero degradation. It can be used to decarbonize industrial at large scale and low cost.

I invested in a pre-seed extension CLA in April 2024.


Nutropy creates cow-free milk using precision fermentation, as feedstock for cheese makers. The resulting cheese will taste exactly the same, but the carbon footprint, land and water use is drastically lower.

I participated in the Seed Round with ZCC in the lead in April 2024.

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Ucaneo develops the World's first cell-free Direct Air Capture (DAC) technology, reversing climate change with synthetic biology. DAC will be needed to reduce global warming and to produce green chemicals. 

I invested in a CLA in October 2023.

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Maeve develops the first 44-seat fully electric airplane.

It will have an initial range of 460km, which can be increased over time with improved battery technology.

The aviation industry has few options to decarbonize. Electric planes are the most obvious and cheap solution. I invested in a CLA in July 2023. 

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Inlyte Energy is transforming the proven sodium metal halide battery technology into a solution to meet the climate crisis today. Made of iron and salt, their grid batteries are built from naturally abundant and inexpensive raw materials. 

I invested in an equity round in August 2023.

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AES developed a containerized chemical plant that turns industrial mixed plastic waste (PE, PP, PET, POM, etc.) into a high quality oil directly on site. Companies that have 250 to 1,000 kg/day of waste can tun it into usable oil, instead of disposing it. I invested in a CLA in May 2023. 

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Urban Ray develops a drone and corresponding delivery service for medical goods, like lab samples between a hospital and a lab. The drone avoids traffic, can travel 25km distance, and is loaded with cargo and battery on a dedicated loading station, fully automatic. I invested in a SAFE in March 2023.

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Marble Studio is a venture builder focusing on deep tech climate tech startups. They partner with scientists, engineers and operators to build deeptech
startups that slash emissions, remove carbon, and cool the planet. I invested in their fund in May 2023.

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AquaLith is a deep tech battery spinout from Maryland University. They commercialise research which involves new battery chemistry, leading to safer, lower cost and higher performing batteries. I invested in a SAFE in March 2023.

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Yellow-SiC is developing a new technology capable of splitting water into hydrogen and oxygen in a one-step process using only sunlight, enabled by a cubic crystal structure of ultra-high purity silicon carbide (3C SiC) serving as a catalyst. I invested in a SAFE in December 2022.

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Brevel "brews" microalgae in an indoor, internally lit bioreactor. The resulting biomassa consists of protein, carbohydrates, fiber, and functional lipids, which can be used as ingredients by the vegan food industry. 

I invested in a SAFE in December 2022.

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Eexion develops a battery based enhanced supercapacitor technology. It charges up to 100 times faster than classic lithium-ion, while maintaining superior energy density and capacity over +30,000 cycles.
It is sustainable, safe, recyclable, and cost-efficient, with no lithium involved. I participated in the seed round in August 2022.

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Spark designs and manufactures off-grid solar systems (PV panels and portable batteries) to families in rural communities in Africa. Modular, expandable and future proof. I participated in a loan to accelerate their expansion in June 2022.

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Renaissance Fusion is a nuclear fusion start-up in Grenoble, France, developing a stellarator reactor, aiming at making simple fusion electricity cheap. I participated in the pre-seed round in 2021.

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Blockheating places a containerized mini data center at the premises of a greenhouse horticulturist, and uses the data center's residual heat to warm the greenhouse. This results in energy savings for both the data center and the horticulturist. With the enormous growth in data processing and storage demand, this solution offsets some of the increasing CO2 emissions of the data center market. I provided a convertible loan in December 2020.

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LeydenJar Technologies is a European based high tech venture, developing pure silicon anodes and its production technology, to boost the energy density of Li-ion battery cells for consumer electronics, electric vehicles, and residential energy storage. We formed a group of 5 angels to make an investment in July 2019.

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Powall (formerly: Delft IMP) has developed a new process and machine for adding nanocoatings to powders, leading to a better cathode material for Li-ion batteries, with improved capacity and lifetime. I made an investment in October 2020.

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Oceans of Energy develops offshore floating solar systems to create abundant, clean and affordable energy. I provided a convertible loan in March 2020.

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Ecosafi creates locally made biomass for cleaner cooking in Kenia. Interested families get a free cooker and can then purchase the biomass brickets, which are made from farm crop waste. This avoids CO2 and other pollution and is cheaper and more sustainable. I invested in February 2022.

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SoSimple Solar is a Dutch project developer of PV installations in South Africa. Through a crowdfunding campaign at they raised a bond to develop some new projects whereby they perform the PV investment and installation on the roofs of small and medium size companies, and sell them back the electricity at a competitive rate.

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H2PRO is a startup that developed E-TAC, a revolutionary method for producing green hydrogen by splitting water that is over 95% efficient, safe and cost-competitive with fossil-fuel hydrogen.

I invested in this very promising company in 2021 through Iangels, a modern VC that offers deal-by-deal investment options.

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Aqua-Spark is a global investment fund that invests in small to medium enterprises that are working towards the production of safe, accessible aquatic life, such as fish, shellfish and plants, in a way that does not harm the health of the planet. I made an investment in them in 2021 as a diversification and to support their goal.

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Perpetuum Energy Partners undertakes geothermal projects, from concept to full development. I provided a convertible loan in March 2020.

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Bluerise is a specialist developer of Ocean Thermal Energy Conversion (OTEC) technology. I made an investment in 2018. Allseas,  a global leader in offshore pipeline installation, heavy lift and subsea construction, acquired Bluerise in Juli 2019.

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Startupbootcamp Sustainability is a new fund which invests in 30 of the most promising startups and scaleups from around the world that focus on creating a more sustainable planet.

I made an investment in this fund through Nxchange in 2021, and I am mentor in the program.

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