Willem-Jan S. — investor profile photo

Willem-Jan S.

Return | Making clean energy work for everyone

📍 Amsterdam, North Holland, Netherlands🔄 Updated November 2026💼 3 investments📅 17 years investing🗓 Last invested Jan 2012𝕏 @upgrade_to_unlock
Operator-angel🌍 Netherlands
3
Total investments
1
Early stage
1
Mid stage
0
Late stage
17y
Years active

Portfolio

3 investments · sorted by recency
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Mid stage
Late stage
Investor and co- founder
Jan 2012
Introducing Your New Way Of Advertising Forget complicated platforms with way too many metrics and focus your attention to where it matters. Learn where you can really make a difference for your business. See all your digital ad results in one place, no matter how many marketing channels or campaigns you have.
Board Member of ZeroPoint
Sep 2009
ZeroPoint Clean Tech, Inc. is building 2-12MW biomass power plants with the world's leading biomass gasification technology. ZeroPoint's proprietary process equipment converts woody biomass to high-quality synthesis gas and a highly stable form of sequestered carbon in the form of biochar. The process is carbon-negative on a simple fuel cycle analysis. The Company's clean-burning synthesis gas can replace oil or gas in engines, burners and boilers or used to produce chemicals and liquid fuels such as ammonia, cellulosic diesel, ethanol or bio-methanol.
Non Executive Board Member
2009
Cautha is a greenfield developer of utility-scale power generation projects exploiting renewable energy sources, focussing on the Italian market. Cautha originates and develops the projects through full permission. It attracts industrial and financial investors to build and operate the plants.
Experience · 9 entries
All (9)
Investments (2)
Founder (5)
Board (2)
2021
Managing Partner
Jan 2021
Return is an energy transition invest & build platform. To return the planet to its original state the entire world needs to change the way it does business. Return partners with mission-driven entrepreneurs in clean energy generation, storage and distribution to help grow faster, and realize more renewable projects. Our Energy Storage platform: • SemperPower - Energy storage, the Netherlands www.semperpower.com • Lion Storage - Energy storage, the Netherlands www.lion-storage.com • J&P Batterie Projekte - Energy storage, Germany www.jp-batterie.de Our Generation & Distribution platforms and projects: • Ekhi - Commercial & Industrial solar developer, Spain www.ekhi.energy • ErasmoPower2X - Utility-scale solar / Hydrogen, Spain www.power2x.com/erasmop2x/ • CargaTuCoche - EV-charging, Spain www.cargatucoche.es Our Carbon platform: • Return Carbon - CCUS projects, the Netherlands www.returncarbon.nl
2019
Soto Solar
Co - founder Solar
Jan 2019
Co - founder Solar
Jan 2019
Ekhi es una plataforma de servicios energéticos renovables de generación distribuida con la vista puesta en el mañana. Trabajamos con profesionalidad y compromiso en el desarrollo e inversión de proyectos que ayudan a reducir costes eléctricos y emisiones contaminantes de CO2, con el objetivo de ser un referente internacional en el suministro de energías renovables para el sector comercial e industrial. Podemos lograr un mundo más sostenible. Por eso, queremos acompañar e impulsar a nuestros clientes a conseguir sus objetivos de sostenibilidad en materia de energía. Entre todos, podemos hacer realidad la transición energética. Ekhi is a platform that provides energy services for distributed energy, with our sights set on the future. We work professionally and with commitment on the investment and development of projects that help to reduce electricity costs and CO2 emissions. Our main objective is becoming an internationally recognised brand in the sector of renewable energy supply, both for the commercial and industrial sectors. We believe in a more sustainable future and to that end, we want to stand by our clients and be the main stepping stone on their way to meeting their energy-related sustainability objectives. Together, we can make the energy transition a reality.
2012
co - founder
Jan 2012
At Sunrock we unite with our clients and partners to lead the charge towards a clean energy future. Founded in 2012, we are now a leading European developer of integrated clean energy systems, servicing valued customers across the logistical and industrial sectors. Our journey accelerated in 2020 when we were acquired by COFRA, further expanding our capacity to deliver tailored solar energy solutions to empower the sustainable energy transition. In 2024 we became B Corp certified. Committed to trust and transparency, we forge long-lasting partnerships along the path towards a brighter, greener tomorrow. Bezoek onze Nederlandse website: https://sunrockenergy.nl/
Investor and co- founder
Jan 2012
Introducing Your New Way Of Advertising Forget complicated platforms with way too many metrics and focus your attention to where it matters. Learn where you can really make a difference for your business. See all your digital ad results in one place, no matter how many marketing channels or campaigns you have.
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Investment activity
2009–2012 · 3 investments
2009220121
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