Investing Profile

Sean O'Sullivan(1)

InvestorVC
Managing General Partner at SOSV
sosv.comNew York City
Photo of Sean O'Sullivan, Managing Partner at SOSV
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Sean O'Sullivan's investing connections

Picture

1 Investor

Connected to David S. Rose (Rose Tech Ventures).

Networks Sean is a member of
NewCo Network
1598 CONNECTIONS
NewCo Network
1598 CONNECTIONS
NewCo Network
1598 CONNECTIONS
Top-Patents Network
1033 CONNECTIONS
Top-Patents Network
1033 CONNECTIONS

Find Sean O'Sullivan on

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Current Investing Position
SOSV Managing Partner
Investment Range
$100K - $5.0M
Sweet Spot
$1.5M
Investments On Record
132
Current Fund Size
$1.2B

Sean O'Sullivan is on these Sector & Stage Rankings

Sean O'Sullivan's Investments On Record (56)

CompanyStageDateRound SizeTotal Raised
VALANX Biotech
Series UnknownMar 2026$3M
SeedJul 2024
$5.1M
Co-investors: Bill Liao (SOSV), Florian Resch (IST cube)
Flore by Sun Genomics
Convertible NoteAug 2025
Convertible NoteNov 2024
Series BDec 2023
Series BNov 2022
Convertible NoteSep 2022
Series AJun 2020$9M
Convertible NoteOct 2019
SeedJan 2019$3M
Pre SeedApr 2018
$12M
Co-investors: Po Bronson (SOSV), Arvind Gupta (Mayfield Fund)
Prellis Biologics
Series CMar 2025
Series CNov 2023
Series CAug 2022$35M
Series BJul 2021$19M
Convertible NoteJun 2021
Convertible NoteApr 2020
SeedApr 2018
SeedApr 2017$120K
$80M
Co-investors: Rohit Sharma (True Ventures), Po Bronson (SOSV), Alireza Masrour (Plug & Play Ventures), Arvind Gupta (Mayfield Fund), Michael Marks (Celesta)
MixRift
Pre SeedAug 2024$2M
$2M
Co-investors: Lomax Ward (Outsized Ventures)
GlowDx
Convertible NoteJun 2024
SeedJul 2022
Convertible NoteAug 2020
Pre SeedSep 2019$500K
Convertible NoteMay 2017$130K
Pre SeedJun 2015$100K
$730K
Co-investors: Bill Liao (SOSV)
Cell BioEngines
Pre SeedApr 2024$500K
Pre SeedAug 2023$250K
Pre SeedMar 2023$280K
$1M
Co-investors: Stephen Chambers (SOSV)
DropGenie
Convertible NoteMar 2024
SeedOct 2021
Convertible NoteMay 2020
SeedApr 2019
Co-investors: Bill Liao (SOSV), Ann Lai (Bullpen Capital)
Aequor
SeedJan 2024$200K
$200K

Sean O'Sullivan's Experience

Founder BlueStone Capital Partners, L.P.Present
Founder Xtripe AngelsPresent
cinematographer, cameraman, freelance photojournalist Janet Speaks FrenchPresent
Founder Janet Speaks FrenchPresent
singer songwriter University of Washington Applied Physics LaboratoryPresent
cinematographer, cameraman, freelance photojournalist University of Washington Applied Physics LaboratoryPresent
Founder University of Washington Applied Physics LaboratoryPresent
singer songwriter MinttownPresent
cinematographer, cameraman, freelance photojournalist MinttownPresent
Founder MinttownPresent
singer songwriter The Grameen Creative LabPresent
cinematographer, cameraman, freelance photojournalist The Grameen Creative LabPresent
Founder The Grameen Creative LabPresent
co-founder, programmer, sales, marketing, president, etc MapInfoPresent
singer songwriter Self-EmployedPresent
cinematographer, cameraman, freelance photojournalist Self-EmployedPresent
Managing Director Carma TechnologyPresent
Founder Self-EmployedPresent
cinematographer, cameraman, freelance photojournalist NewCoPresent
Founder NewCoPresent
singer songwriter Top-PatentsPresent
cinematographer, cameraman, freelance photojournalist Top-PatentsPresent
Founder Top-PatentsPresent
co-founder, programmer, sales, marketing, president, etc MapInfo CorporationPresent
singer songwriter Janet Speaks FrenchPresent
animal tamer, co-founder & ceo NetCentricPresent
co-founder JumpstartPresent
cinematographer, cameraman, freelance photojournalist Two Pop ProductionsPresent
Chairman MapflowPresent
Managing Director CarmaPresent
Founder Open IrelandPresent
Managing General Partner SOSVPresent
singer songwriter NewCoPresent

Sean O'Sullivan's Education

University of Southern California MFA, Film Production, School of Cinema-Television Film Production
University of Cambridge Accelerated Growth Program Executive MBA Program
University of Southern California MFA Film Production, School of Cinema-Television
Rensselaer Polytechnic Institute BS, Electrical Engineering Electrical Engineering