United States · 
What does SOSV invest in?
SOSV invests most often at Venture and Seed (83% of the rounds on record), in sectors such as Psychedelic, Protein and Tech-enabled Health.
SOSV highlights
- 01
73 cheques in the last 12 months
- 02
Mostly Venture and Seed: 83% of its rounds
- 03
Sole investor in 263 rounds, median $715K
- 04
11 exits from the portfolio
What they do
SOSV is the world’s most active deep tech venture capital firm investing at pre-seedFrom their own website
- Type
- VC firm (from a list, unverified)
- Cheque size
- $250K – $525K as they say
- Stages
- Pre-seed
- Sectors
- PsychedelicProteinTech-enabled Health
- Based in
- New York, United States
- Cold pitches
- Not stated
The record
Every round we can evidence, newest first950 appearances
- 2026
55 rounds
- Oct
- Oct
- Sept
- Sept
- Sept
- Sept
- Sept
- Sept
- Aug
- Aug
- Aug
- Jul
- Jul
- Jul
- Jul
- Jul
- Jul
- Jul
- Jun
- May
- Apr
- Apr
- Apr
- Apr
- Apr
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Mar
- Feb
- Feb
An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.
The team
Named by the firm itself, on a filing, its Form ADV or its company registration3 named
SOSean O'SullivanDirector of the General Partner of the General Partner of the Primary Issuer and Senior Partner of the General Partner of the Additional IssueriFiling they signed
SOSean O'SulllivanMANAGING MEMBERiFiling they signed
SJStephen John MccannChief Financial OfficeriForm ADV
We also hold 77 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.
What the register says
From the firm's own filings with the SEC, which it must file accurately by law
$1.3Bgross assets of its fundsOct 2026
4+funds on filenumbered funds in its name
Exemptreporting adviserventure or small private funds
- Legal name
- SOSV Investments LLC
- SEC number
- CRD 284976
What they claim to have backed
From their own portfolio page (on their website)
0 of 1 we have independently watched raise
Sosvdeeptech
Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded.
Exits from the portfolio
Companies it backed that were later bought or listed11 in all
SplitforceBought by LocalyticsUndisclosedApr 2015
MelonBought by DAQRIUndisclosedFeb 2015
Global Protein SolutionsBought by MeatcoUndisclosedMar 2014
Collaborate.comBought by CiscoUndisclosedDec 2013
MapflowBought by LexisNexisUndisclosedSept 2013
play140Bought by Oomba$270KApr 2012
Harmonix Music SystemsBought by MTV$175MSept 2006
Genetic AnomaliesBought by THQ$8.0MDec 1999
Arris NetworksBought by Cascade Communications$145MMay 1996
An exit counts when it came after the firm's first round in the company. From historical deal records.