Mark Heynen
Angel investor in Mill Valley
Mill Valley, California
Mark Heynen, Angel investor in Mill Valley is an active investor based in Mill Valley, California. This profile covers what Mark Heynen backs, at which stage, and how founders can reach out in 2026.
- Investor type
- Angel
- Stages
- Pre SeedSeed
- Invests in
- Hardware & Deep TechCrypto & Web3
- Location
- Mill Valley, California
- Typical check
- $150K
- Past investments
- 4
Notable investments
SkycatchNext Billion AdvisorsStellar Development FoundationHow to reach Mark Heynen
Angels and operators like Mark Heynen reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded Accelerator.
Connect with Mark Heynen
Frequently Asked Questions
What does Mark Heynen invest in?
Mark Heynen invests in Hardware & Deep Tech and Crypto & Web3, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Mark Heynen invest at?
Mark Heynen typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Mark Heynen's typical check size?
Mark Heynen typically writes checks around $150K. Use it as a signal for whether your raise fits their stage.
How do I contact Mark Heynen?
Unlock Mark Heynen's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.