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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1 Investor

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

NewCo Network
1586 CONNECTIONS
NewCo Network
1586 CONNECTIONS
NewCo Network
1586 CONNECTIONS
Top-Patents Network
1030 CONNECTIONS
Top-Patents Network
1030 CONNECTIONS
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SOSV Managing Partner
$100K - $5.0M
$1.5M
135
$1.2B
CompanyStageDateRound SizeTotal Raised
VALANX Biotech
Series UnknownMar 2026$3M
SeedJul 2024
$5.1M
Co-investors: Bill Liao (SOSV), Florian Resch (IST cube)
Prellis Biologics
Series CNov 2025
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
$65M
Co-investors: Rohit Sharma (True Ventures), Po Bronson (SOSV), Alireza Masrour (Plug & Play Ventures), Arvind Gupta (Mayfield Fund)
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
SeedApr 2018
$12M
Co-investors: Po Bronson (SOSV), Arvind Gupta (Mayfield Fund)
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
DropGenie
Convertible NoteMar 2024
SeedOct 2021
Convertible NoteMay 2020
SeedApr 2019
Co-investors: Bill Liao (SOSV)
Aequor
SeedJan 2024$200K
$200K
singer songwriter NewCoPresent
Managing General Partner SOSVPresent
Founder Open IrelandPresent
Managing Director CarmaPresent
Chairman MapflowPresent
cinematographer, cameraman, freelance photojournalist Two Pop ProductionsPresent
co-founder JumpstartPresent
animal tamer, co-founder & ceo NetCentricPresent
singer songwriter Janet Speaks FrenchPresent
co-founder, programmer, sales, marketing, president, etc MapInfo CorporationPresent
Founder Top-PatentsPresent
cinematographer, cameraman, freelance photojournalist Top-PatentsPresent
singer songwriter Top-PatentsPresent
Founder NewCoPresent
cinematographer, cameraman, freelance photojournalist NewCoPresent
Founder Self-EmployedPresent
Managing Director Carma TechnologyPresent
cinematographer, cameraman, freelance photojournalist Self-EmployedPresent
singer songwriter Self-EmployedPresent
co-founder, programmer, sales, marketing, president, etc MapInfoPresent
Founder The Grameen Creative LabPresent
cinematographer, cameraman, freelance photojournalist The Grameen Creative LabPresent
singer songwriter The Grameen Creative LabPresent
Founder MinttownPresent
cinematographer, cameraman, freelance photojournalist MinttownPresent
singer songwriter MinttownPresent
Founder University of Washington Applied Physics LaboratoryPresent
cinematographer, cameraman, freelance photojournalist University of Washington Applied Physics LaboratoryPresent
singer songwriter University of Washington Applied Physics LaboratoryPresent
Founder Janet Speaks FrenchPresent
cinematographer, cameraman, freelance photojournalist Janet Speaks FrenchPresent
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