Sieto Jonkers, Partner at Family Capital Management is an active investor based in Vught, North Brabant. This profile covers what Sieto Jonkers backs, at which stage, and how founders can reach out in 2026.
Partner at Family Capital Management BV.
Sieto Jonkers typically invests at Late Stage Venture.
- Investor type
- Family OfficeInvestment Partner
- Stages
- Late Stage Venture
- Location
- Vught, North Brabant
- Typical check
- $7M
How to reach Sieto Jonkers
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Cite this page
Round Funded. "Sieto Jonkers." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/sieto-jonkers
Frequently Asked Questions
Who is Sieto Jonkers?
Sieto Jonkers, Partner at Family Capital Management is an active investor based in Vught, North Brabant. Sieto Jonkers typically invests at Late Stage Venture.
What stage does Sieto Jonkers invest at?
Sieto Jonkers typically invests at Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Sieto Jonkers's typical check size?
Sieto Jonkers typically writes checks around $7M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.