Guillermo S.

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📍 The Randstad, Netherlands, Netherlands🔄 Updated September 2026💼 1 investments📅 12 years investing🗓 Last invested Jan 2014𝕏 @upgrade_to_unlock
Operator-angel🌍 Netherlands
1
Total investments
0
Early stage
1
Mid stage
0
Late stage
12y
Years active

Portfolio

1 investments · sorted by recency
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Mid stage
Late stage
Mentor - Investor
Jan 2014
Rockstart is an early stage investor that empowers purpose-driven founders across three domains: Energy, AgriFood, and Emerging Technologies. Rockstart invests in early-stage startups from each of the three funds and provides access to capital, market, and expertise by connecting founders with co-investors, mentors, partners, corporates, and the wider Rockstart network. Rockstart has invested in more than 350 startups and its alumni value to date is more than €1.3bn. Rockstart is an international team of 45+ professionals dedicated to empowering purpose-driven founders to become scalable and drive positive change on a global scale. Rockstart has notable exits such asWercker, Dan.com, Hubs.Com, Bouw7, iClinic, and s and Brincr. The company has offices in Amsterdam, Copenhagen, and Bogota.
Experience · 6 entries
All (6)
Investments (1)
Founder (5)
2016
Co-founder
Dec 2016
Cyber Security Services
CEO / Co-founder
Jan 2016
We have developed an improved Monocyte Activation Test (MAT) for pyrogen testing. The MAT serves as the replacement for the Rabbit Pyrogen Test and can be used to test parenteral drugs for endotoxin and non-endotoxin contaminations. Our technology uses cryopreserved pooled PBMC. This has made it possible to develop a MAT with both high sensitivity and robustness, ensuring reliability in the field. Monocyte Activation Test (MAT) The Monocyte Activation Test (MAT) is a pyrogen test. MAT uses human blood cells to test for a fever reaction, mimicking the human immune reaction.The MAT serves as the replacement for the Rabbit Pyrogen Test and can be used to test parenteral drugs for endotoxin and non-endotoxin contaminations. Our technology uses cryopreserved pooled PBMC. This has made it possible to develop a MAT with both high sensitivity and robustness, ensuring reliability in the field. The MAT kit includes all the required consumables to perform the Monocyte Activation Test, making it convenient to perform. In addition to the kit we provide consulting services and technical support in setting up the MAT in your organisation.
GFS Management
Founder
Jan 2016
2015
Founder
Jan 2015
"GREAT THINGS MAY COME TO THOSE WHO WAIT, BUT ONLY THE THINGS LEFT BY THOSE WHO HUSTLE.” We do early stage investments and participations in SaaS, E-commerce and Pharma.
2014
Mentor - Investor
Jan 2014
Rockstart is an early stage investor that empowers purpose-driven founders across three domains: Energy, AgriFood, and Emerging Technologies. Rockstart invests in early-stage startups from each of the three funds and provides access to capital, market, and expertise by connecting founders with co-investors, mentors, partners, corporates, and the wider Rockstart network. Rockstart has invested in more than 350 startups and its alumni value to date is more than €1.3bn. Rockstart is an international team of 45+ professionals dedicated to empowering purpose-driven founders to become scalable and drive positive change on a global scale. Rockstart has notable exits such asWercker, Dan.com, Hubs.Com, Bouw7, iClinic, and s and Brincr. The company has offices in Amsterdam, Copenhagen, and Bogota.
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