Sean O'Sullivan
Managing Partner, SOSV at SOSV
New York City, New York
Sean O'Sullivan, Managing Partner, SOSV at SOSV is an active investor based in New York City, New York. This profile covers what Sean O'Sullivan backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPECorporate VCInvestment PartnerAccelerator
- Stages
- Early Stage VentureSeed
- Invests in
- Artificial IntelligenceHealthcare & BiotechDigital Health & HealthTechBiotech & PharmaMedTech & Medical DevicesSaaS & EnterpriseConsumer & RetailConsumer Goods (CPG)
- Location
- New York City, New York
- Typical check
- $375K
- Past investments
- 2
Notable investments
CarmaHow to reach Sean O'Sullivan
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Frequently Asked Questions
What does Sean O'Sullivan invest in?
Sean O'Sullivan invests in Artificial Intelligence, Healthcare & Biotech, Digital Health & HealthTech and Biotech & Pharma, typically at Early Stage Venture and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Sean O'Sullivan invest at?
Sean O'Sullivan typically invests at Early Stage Venture and Seed. Lead with traction that fits the stage when you reach out.
What is Sean O'Sullivan's typical check size?
Sean O'Sullivan typically writes checks around $375K. Use it as a signal for whether your raise fits their stage.
How do I contact Sean O'Sullivan?
Unlock Sean O'Sullivan's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.