Brian Greenstein
Managing Partner at Ardour Capital Investments
New York, New York
Brian Greenstein, Managing Partner at Ardour Capital Investments is an active investor based in New York, New York. This profile covers what Brian Greenstein backs, at which stage, and how founders can reach out in 2026.
Brian Greenstein is the Managing Partner at Ardour Capital Investments, specializing in Clean Technologies and capital markets.
Brian Greenstein invests in Climate & Energy, typically at Early Stage Venture and Seed.
- Investor type
- VCFamily Office
- Stages
- Early Stage VentureSeed
- Invests in
- Climate & Energy
- Location
- New York, New York
- Typical check
- $375K
How to reach Brian Greenstein
Angels and operators like Brian Greenstein 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.
Reach active investors like this one
About this profile
This profile is part of Round Funded, an investor database and outreach platform for founders. It covers 60,000+ active VCs, angels, family offices and accelerators with verified contacts, lets you send pitches from your own Gmail, and includes a free Data Room for your raise. How this data is built.
Cite this page
Round Funded. "Brian Greenstein." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/brian-greenstein
Frequently Asked Questions
Who is Brian Greenstein?
Brian Greenstein, Managing Partner at Ardour Capital Investments is an active investor based in New York, New York. Brian Greenstein invests in Climate & Energy, typically at Early Stage Venture and Seed.
What does Brian Greenstein invest in?
Brian Greenstein invests in Climate & Energy, typically at Early Stage Venture and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Brian Greenstein invest at?
Brian Greenstein typically invests at Early Stage Venture and Seed. Lead with traction that fits the stage when you reach out.
What is Brian Greenstein's typical check size?
Brian Greenstein typically writes checks around $375K. 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.