Overwater Ventures is an early-stage venture capital firm founded by Kristina Simmons that partners with technical founders solving the world's biggest problems in human and planetary health. The firm invests at the pre-seed and seed stages in breakthrough technologies across biology, healthcare, AI, robotics, and climate.
Deal activity increased 200% year-over-year (3 deals in the last 12 months). Their most common stage is seed (62% of deals). Average disclosed round size is $14.2M (across 7 rounds with reported amounts).
Portfolio
8
Fund Size
$20M
Top Stage
Seed
Last 12 Mo
4
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
8 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Apaluma | Seed | $5.5M | Jan 2026 |
 Adaptyx Biosciences | Seed | $14M | Oct 2025 |
| AAdaptyx Biosciences | Seed | $14M | Oct 2025 |
 Penguin AI | Series A | $29.7M | Sep 2025 |
| OOverture Life | Series B | — | Apr 2025 |
 BeSound | Seed | $6.8M | Jan 2025 |
 Gameto | Series A | $20M | Jan 2022 |
| HHyfe | Seed | $9M | — |
Top Co-Investors
Lux Capital2 shared
Interlagos2 shared
Cantos2 shared
Stanford University2 shared
Hyperlink Ventures2 shared
Starbloom Capital2 shared
Bold Capital Partners1 shared
Future Fund1 shared
Gaingels1 shared
True Ventures1 shared
Plum Alley Ventures1 shared
TA Associates1 shared
Plug and Play Tech Center1 shared
ManchesterStory Group1 shared
SemperVirens Venture Capital1 shared
Horizon Mutual Holdings1 shared
Watershed Ventures1 shared
Greycroft1 shared
Snowflake Ventures1 shared
UPMC Enterprises1 shared
Last updated: 8 September 2026