Propeller is an early-stage venture capital firm investing in ocean-climate startups, focusing on ocean carbon, ocean organics, and ocean industrials. Founded in 2022, the firm partners with Woods Hole Oceanographic Institution and raised a $100 million inaugural fund.
40% of their portfolio is in Climate & Energy. Their most common stage is seed (73% of deals). Average disclosed round size is $5.2M (across 14 rounds with reported amounts).
Portfolio
15
Fund Size
$100M
Top Stage
Seed
Last 12 Mo
0
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
15 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Vema Hydrogen | Seed | $13M | Feb 2025 |
 Vatn Systems | Seed | $13M | Nov 2024 |
 Gameball, Inc. | Seed | $3.5M | Feb 2023 |
 Gameball | Seed | $3.5M | Jan 2023 |
 Lablabee | Pre-Seed | — | Sep 2022 |
 Nestrom | Seed | $120K | Jan 2019 |
 Banyu Carbon | Seed | $6.5M | — |
| PPhathom | Seed | $4M | — |
 Allium Engineering | Seed | $3.3M | — |
 Orpheus Ocean | Pre-Seed | $2.8M | — |
 Aikido Technologies | Seed | $4M | — |
 Corgea | Seed | $2.6M | — |
 Orpheus | Pre-Seed | $2.8M | — |
 Olokun Minerals | Pre-Seed | $1.1M | — |
| VVatn | Seed | $13M | — |
Top Co-Investors
Launch Africa Ventures2 shared
P1 Ventures2 shared
500 Global2 shared
Arzan Venture Capital2 shared
Fortitude Ventures2 shared
Blue Collective2 shared
Lockheed Martin Ventures2 shared
Cubit Capital2 shared
Centre Street Partners2 shared
Decisive Point2 shared
Grantham Foundation2 shared
Village Global2 shared
Jetstream2 shared
Breakthrough Energy Fellows2 shared
Sierra Ventures1 shared
Day One Ventures1 shared
Mosaic Ventures1 shared
In-Q-Tel1 shared
XTX Markets1 shared
Brighteye Ventures1 shared
Last updated: 8 September 2026