Jeffrey Rosen
Venture Partner at Pioneer Fund
Surrey, California
Jeffrey Rosen, Venture Partner at Pioneer Fund is an active investor based in Surrey, California. This profile covers what Jeffrey Rosen backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCInvestor
- Stages
- Pre SeedSeed
- Invests in
- Gaming & Entertainment
- Location
- Surrey, California
- Typical check
- $150K
- Past investments
- 2
Notable investments
MayhemHow to reach Jeffrey Rosen
Angels and operators like Jeffrey Rosen 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 Jeffrey Rosen
Frequently Asked Questions
What does Jeffrey Rosen invest in?
Jeffrey Rosen invests in Gaming & Entertainment, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Jeffrey Rosen invest at?
Jeffrey Rosen typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Jeffrey Rosen's typical check size?
Jeffrey Rosen typically writes checks around $150K. Use it as a signal for whether your raise fits their stage.
How do I contact Jeffrey Rosen?
Unlock Jeffrey Rosen's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.