John O'Sullivan
Venture investor in Ireland
Ireland
John O'Sullivan, Venture investor in Ireland is an active investor based in Ireland. This profile covers what John O'Sullivan backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCInvestor
- Stages
- Seed
- Invests in
- FintechE-commerce & D2CGaming & EntertainmentMedTech & Medical DevicesCybersecurityMarketing & AdTechSupply Chain & LogisticsHR & Future of Work
- Location
- Ireland
- Typical check
- $250K
- Past investments
- 70
Notable investments
Cubic Telecom
AutoEntry
Ekco
Eblana Photonics
mAdmeVISUA
Novate Medical
DirectSki.comDigit Game StudiosCR2
Engage-EHSHow to reach John O'Sullivan
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Frequently Asked Questions
What does John O'Sullivan invest in?
John O'Sullivan invests in Fintech, E-commerce & D2C, Gaming & Entertainment and MedTech & Medical Devices, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does John O'Sullivan invest at?
John O'Sullivan typically invests at Seed. Lead with traction that fits the stage when you reach out.
What is John O'Sullivan's typical check size?
John O'Sullivan typically writes checks around $250K. Use it as a signal for whether your raise fits their stage.
How do I contact John O'Sullivan?
Unlock John O'Sullivan's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.