S
Sunstone
Sunstone is a seed to Series B stage investment firm. It has made 12 investments. Average disclosed round size is $19.4M (across 8 rounds with reported amounts).
Portfolio
12
Fund Size
—
Top Stage
Series B
Last 12 Mo
1
Team
AM
Arneek Multani
Co-Founder & Managing Partner
JM
John Moragne
Co-Founder & Managing Director
JK
John Keisler
CEO & Managing Partner
MS
Mike Stone
Partner and Chief Investment Officer
SL
Sean Lenahan
Partner
AH
Alex Huang
Private Equity
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
14 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Kynexis | Series A | — | Aug 2026 |
 TravelPerk | Series E | — | Jan 2025 |
 Cardior Pharmaceuticals GmbH | Series B | — | Aug 2021 |
| QQwinix | Growth | — | May 2021 |
 Perk | Series A | $26M | Apr 2018 |
| Perk | Series C | $44M | Jan 2018 |
| OOnica | Unknown | $20M | Jan 2017 |
 Natural Cycles | Series B | $30M | Jan 2016 |
| PPrexton Therapeutics | Series A | $10M | Jan 2015 |
| PPrexton | Series A | $10M | Jan 2015 |
 Neo4J | Seed | $2.5M | Jan 2009 |
 Cloudmade | Series B | $12.3M | Mar 2008 |
| Cardior Pharmaceuticals GmbH | Series B | — | — |
 Everywear | Seed | — | — |
Top Co-Investors
Sunstone Partners6 shared
Sunstone Life Science Ventures4 shared
Amplo3 shared
General Catalyst3 shared
Target Global3 shared
Felix Capital3 shared
Spark Capital3 shared
Ysios Capital3 shared
EQT Life Sciences2 shared
coparion2 shared
Bristol Myers Squibb2 shared
Fund+2 shared
High-Tech Gründerfonds2 shared
INKEF Capital2 shared
Hadean Ventures2 shared
Phoenix Court Group2 shared
Kinnevik2 shared
EQT Ventures2 shared
Greylock Partners1 shared
83North1 shared
Last updated: 7 October 2026