David Birnbaum
Managing Partner at Five Four Ventures
New York City, New York
David Birnbaum, Managing Partner at Five Four Ventures is an active investor based in New York City, New York. This profile covers what David Birnbaum backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPEInvestment Partner
- Stages
- Pre SeedSeedSeries ASeries BLate Stage Venture
- Invests in
- Artificial IntelligenceSaaS & Enterprise
- Location
- New York City, New York
- Typical check
- $1M
- Past investments
- 1
Notable investments
How to reach David Birnbaum
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Round Funded. "David Birnbaum." Round Funded investor database, updated October 5, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/david-birnbaum
Frequently Asked Questions
What does David Birnbaum invest in?
David Birnbaum invests in Artificial Intelligence and SaaS & Enterprise, typically at Pre Seed, Seed, Series A and Series B. Match your sector and stage, then reach out with a personalized pitch.
What stage does David Birnbaum invest at?
David Birnbaum typically invests at Pre Seed, Seed, Series A and Series B. Lead with traction that fits the stage when you reach out.
What is David Birnbaum's typical check size?
David Birnbaum typically writes checks around $1M. 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?
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