Investor profile
Don Ritzen
Angel, Operator angel & Founder and advisor at Rockstart, Founder & CEO at SHIFT
An angel investor and operator angel based in Amsterdam, North Holland, Netherlands, Don Ritzen has 6 known investments: PastBook, Nexi, Peerby, Ideedock, Postcron and VideoAvatars.
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Investment focus
Contacts
Don Ritzen portfolio companies (6)
- PastBook
- Nexi
- Peerby
- Ideedock
- Postcron
- VideoAvatars
Affiliated funds' portfolios
Founder and advisor at Rockstart, whose known portfolio counts 15 companies
- Refurbi
- Tractor Junction
- Level Nine
- SenseUp Biotechnology
- Another Earth
- Root Sustainability
- Geobirds
- Sin Intermediarios
- hackU
- Contribe.io
- Decameal
- EtOH Spirits
- and 3 more
Founder & CEO at SHIFT, whose known portfolio counts 3 companies
- Fez
- Leeways
- Repro
Investor Profile
The known portfolio sits in sectors AI, Consumer, Hardware and SaaS, and focus areas Data Analytics, Enterprise SaaS, HR Tech and Marketplaces.
The portfolio and focus above give founders context on whether Don Ritzen matches their raise.
Colleagues
Juan Salcedo
Mentor
Canada
Ohad Gilad
Investor
Amsterdam, Netherlands
Hidetaka Kojima
Head of Corporate Development Division
Tokyo, Japan
Robert Wilhelm
Advisory Board Member
Amsterdam, Netherlands
Julia Padberg
Investment Committee - Member
Hilversum, Netherlands
Rune Theill
CEO & Founder
Copenhagen, Denmark
Daniella Barreto Garces
Investor
Bogotá, Colombia
Juan Sebastian Iraizoz Cardona
Angel Investor
Cali, Colombia
Timothy Shoup
Senior Advisor
Copenhagen, Denmark
Ignacio Gonzalez Oñate
Investor
Madrid, Spain
Masaru Tange
Owner
Japan
Jens Erik Nissen
Startup Mentor
Copenhagen, Denmark
Tony Urban
Mentor
San Francisco, United States
Mark Durno
Managing Partner
Edinburgh, United Kingdom
Max ter Horst
Managing Partner
Netherlands
Arnout Dijkhuizen
Investment Principal Agrifood
Brussels, Belgium
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Frequently asked questions
Who is Don Ritzen?
Don Ritzen is an angel investor and operator angel based in Amsterdam, North Holland, Netherlands with 6 known investments on file, among them PastBook, Nexi and Peerby. The sections above list the sectors and firms attached to that record.
What does Don Ritzen invest in?
Listed sectors include AI, Consumer, Hardware and SaaS; listed focus areas include Data Analytics, Enterprise SaaS, HR Tech and Marketplaces. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
Which firm is Don Ritzen listed at?
Don Ritzen is listed as Founder and advisor at Rockstart. 16 other people in the database share a firm with Don Ritzen.
How do I contact Don Ritzen?
An email address and a LinkedIn page are on file for Don Ritzen. The address stays masked on this page and is readable inside RaiseHunt after you create an account. The database holds no phone number for this profile.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal