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
- Mobility & LogisticsAutomotive & EV
- Location
- New York City, New York
- Typical check
- $375K
- Past investments
- 2
Notable investments
CarmaHow to reach Sean O'Sullivan
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Cite this page
Round Funded. "Sean O'Sullivan." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/sean-osullivan
Frequently Asked Questions
What does Sean O'Sullivan invest in?
Sean O'Sullivan invests in Mobility & Logistics and Automotive & EV, 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 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.