Mike O'Sullivans, Acting CFO at Green Stream Investments is an active investor based in London, England. This profile covers what Mike O'Sullivans backs, at which stage, and how founders can reach out in 2026.
Mike O'Sullivans is an experienced banking professional with extensive experience in managing Mergers & Acquisitions and restructuring a renewable energy fund.
Mike O'Sullivans invests in Climate & Energy, typically at Seed and Series A.
- Investor type
- VCPE
- Stages
- SeedSeries A
- Invests in
- Climate & Energy
- Location
- London, England
- Typical check
- $625K
How to reach Mike O'Sullivans
Angels and operators like Mike O'Sullivans 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. "Mike O'Sullivans." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/mike-o-sullivans
Frequently Asked Questions
Who is Mike O'Sullivans?
Mike O'Sullivans, Acting CFO at Green Stream Investments is an active investor based in London, England. Mike O'Sullivans invests in Climate & Energy, typically at Seed and Series A.
What does Mike O'Sullivans invest in?
Mike O'Sullivans invests in Climate & Energy, typically at Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Mike O'Sullivans invest at?
Mike O'Sullivans typically invests at Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Mike O'Sullivans's typical check size?
Mike O'Sullivans typically writes checks around $625K. 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.