An angel investor based in New York, United States, Sean O'Sullivan has one known investment, Zify.
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Investment focus
Contacts
Sean O'Sullivan portfolio company (1)
- Zify
Affiliated funds' portfolios
Managing Partner, SOSV at SOSV SF & NY (Fka IndieBio), whose known portfolio counts 20 companies
- Hyivy Health
- Transition Metal Solutions
- Fermeate
- TippingPoint Biosciences
- Flair
- SEQUENTIAL
- Cocoon
- Cellens
- OncoPrecision
- Cauldron Ferm
- heXem bio
- Lingrove
- and 8 more
Investor Profile
Founders in the listed sectors AI, Consumer, Hardware and Healthcare, and focus areas Biotech, Medical Devices, Mobility and Robotics will recognize the pattern in this portfolio.
Sean O'Sullivan is listed for Seed and Series A rounds in the database.
Reviewing the investment history helps decide whether there is a realistic fit before reaching out.
Colleagues at SOSV SF & NY (Fka IndieBio)
Showing 20 of 30
Ben Joffe
Senior Partner
Lisbon, Portugal
Alan Clayton
Roaming Mentor
Kinsale, Ireland
Alexander Hall-Daniels
Principal
New York, United States
Cyril Ebersweiler
General Partner
Singapore
Shawn Broderick
Venture Partner
Newtonville, United States
Oscar Ramos
General Partner
Shanghai, China
Parikshit Sharma
Partner
San Francisco, United States
Stephen Chambers
General Partner
New York, United States
James Caffyn
Mentor
New York, United States
Darshil P.
Venture Capital
Pickering, Canada
Justin H.
Investor
New York, United States
Diana Kam
Mentor
Singapore
William Bao Bean
Venture Partner
Riyadh, Saudi Arabia
Bill Liao
General Partner
Cork, Ireland
Sean O'Sullivan
Managing General Partner
New York City, United States
Yuan-Ting M.
Head Of Africa Investments
Nairobi, Kenya
Steve McCann
General Partner
Ireland
Pae W
General Partner
United States
Kelly Kirkpatrick
Investor
Ireland
Alex Kopelyan
Senior Director
United States
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Frequently asked questions
Who is Sean O'Sullivan?
Sean O'Sullivan is an angel investor based in New York, United States with one known investment on file, Zify. The sections above list the sectors, stages and firms attached to that record.
What does Sean O'Sullivan invest in?
Listed sectors include AI, Consumer, Hardware and Healthcare; listed focus areas include Biotech, Medical Devices, Mobility and Robotics. Those tags come from the companies attached to this profile, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Sean O'Sullivan invest at?
The database lists Sean O'Sullivan for Seed and Series A rounds. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Sean O'Sullivan listed at?
Sean O'Sullivan is listed as Managing Partner, SOSV at SOSV SF & NY (Fka IndieBio). 30 other people in the database share a firm with Sean O'Sullivan.
How do I contact Sean O'Sullivan?
An email address, a phone number and a LinkedIn page are on file for Sean O'Sullivan. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal