United States · 
What does Positive Sum invest in?
Positive Sum invests most often at Series C and Seed (50% of the rounds on record), in sectors such as Venture Capital & Private Equity.
Positive Sum highlights
- 01
5 cheques in the last 12 months
- 02
Mostly Series C and Seed: 50% of its rounds
- 03
Led 1 rounds
What they do
We back founders pursuing their life’s work.From their own website
- Type
- Private equity (from a list, unverified)
- Cheque size
- $100K – $20M as they say
- Stages
- SeedSeries ASeries B
- Sectors
- Venture Capital & Private Equity
- Based in
- New York City, United States
- Cold pitches
- Not accepted
The record
Every round we can evidence, newest first7 appearances
- 2026
5 rounds
- Aug
- Aug
- Jul
- Jul
- Feb
- 2025
2 rounds
- Sept
- May
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
PWPatrick Walker O'ShaughnessyCEO and Partner of ManageriFiling they signed
RPRobert ParkerChief Operating Officer of the ManageriFiling they signed
SBSamuel Blake CatesManaging DirectoriForm ADV
We also hold 6 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
$820Mgross assets of its fundsOct 2026
Exemptreporting adviserventure or small private funds
- Legal name
- Positive SUM Advisors LLC
- SEC number
- CRD 324219
What they claim to have backed
From their own portfolio page (on their website)
18 of 28 we have independently watched raise
AlpacaArcBase PowerBending SpoonsBluesCognitionEight SleepEtchedID.meInvertJanuaryModalNeko HealthPhysical IntelligencePrefectRidgelineSkyryseVantaArcanaCanopyCasaColossusEntrepreneurs FirstFortellInheritanceRetroRogoTegus (acquired by AlphaSense)
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.