Angel investor based in Hengelo, Netherlands.
7 companies backed across
8 recorded rounds, Jun 2013 – Apr 2025.
Ex-Founder Adviesbureau Lenco, CEO Super B Lithium Power, Booking, Rentalcars, Agoda, Uber. Fontys University of Applied Sciences BSc 1988, University of Twente MBA 1992
Sectors of the companies in the portfolio, by company count.
Head-office city of the companies in the portfolio.
Rounds by stage.
Total size of the rounds they joined — an angel's own cheque is a share of this, and is not disclosed.
Every company Kees Koolen appears as an investor in, most recent round first.
| Company | City | Sectors | Latest round | Rounds | Round value |
|---|---|---|---|---|---|
| Unravel | London | Online Travel | Series A Apr 2025 | 1 | $7M |
| Holidu | Munich | Online TravelVacation RentalsAlternative Accommodation | Series D May 2021 | 2 | $45M |
| Sympower LED | Amsterdam | Energy Efficiency TechSmart GridIoT Applications | Series B Mar 2021 | 1 | $6.2M |
| Woba | Belo Horizonte | Commercial Real Estate TechReal Estate TechCoWorking Spaces | Seed Jun 2018 | 1 | — |
| The Cloakroom | Amsterdam | Fashion TechB2C Fashion E-CommerceB2C E-Commerce | Seed May 2014 | 1 | $1.6M |
| GetYourGuide | Berlin | Online TravelOnline Travel AgenciesTours & Activities | Series A Jan 2014 | 1 | $4.5M |
| Hotmart LED | Amsterdam | Continued LearningE-Commerce EnablersEdTech | Angel Jun 2013 | 1 | — |
Investors that appear in the same rounds. Two names in one round is what "invested together" means here — it is not a claim about a relationship off the cap table.
| Investor | Type | Based | Shared rounds | Shared companies |
|---|---|---|---|---|
| Enfuro Ventures | Firm | Amsterdam | 1 | 1 |
| Rubio impact Ventures | Firm | Amsterdam | 1 | 1 |
| Olivier Bisserier | Angel | 1 | 1 | |
| Casper Peeters | Angel | 1 | 1 | |
| 83NORTH | Firm | London | 1 | 1 |
| Senovo | Firm | Munich | 1 | 1 |
| Slingshot | Firm | Amsterdam | 1 | 1 |
| EQT Ventures | Firm | Stockholm | 1 | 1 |
| LIOS Ventures | Firm | Munich | 1 | 1 |
| Prime Ventures | Firm | Amsterdam | 1 | 1 |
| Venture Stars | Firm | Munich | 1 | 1 |
| PDENH | Firm | Amsterdam | 1 | 1 |
| Fritz Demopoulos | Angel | 1 | 1 | |
| Antler | Firm | Ho Chi Minh City | 1 | 1 |
| Active Partners | Firm | London | 1 | 1 |
| Claret Capital Partners | Firm | London | 1 | 1 |
| Connect Ventures | Firm | London | 1 | 1 |
| Chris Hitchen | Angel | Munich | 1 | 1 |
| Upscalers | Firm | Paris | 1 | 1 |
| Nauta Capital | Firm | London | 1 | 1 |