Carbon Direct Capital
New York, New York, United StatesFounded 2019
Carbon Direct Capital is a New York-based growth equity firm investing in carbon management, clean energy, and decarbonization technologies. It combines deep investment expertise with scientific and technical rigor to maximize climate impact and financial returns.
65% of their portfolio is in Climate & Energy. Deal activity increased 100% year-over-year (2 deals in the last 12 months). Average disclosed round size is $136.8M (across 18 rounds with reported amounts).
Portfolio
17
Fund Size
—
Top Stage
Series A
Last 12 Mo
2
Team
Joshua Dienstag
Chief Investment Officer
Au Le
Controller
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
23 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Neurophos | Series A | $110M | Jan 2026 |
 Sage | Series B | — | Jan 2026 |
| SSage Geosystems | Series B | $97M | Jan 2026 |
 Heirloom | Series B | — | Dec 2024 |
 Twelve | Series C | $400M | Sep 2024 |
 Graphyte | Series A | — | Jul 2024 |
 Sunfire | Series E | — | Mar 2024 |
 Air Company | Series B | — | Jan 2024 |
 Velocys | Growth | $40M | Jan 2024 |
 ION Clean Energy | Series A | $45M | Jan 2024 |
 Plasmonics | Series C | $76M | Nov 2022 |
| SSyzygy | Series C | $76M | Nov 2022 |
| Air Company | Series A | $30M | Apr 2022 |
 Air Company | Series A | $30M | Apr 2022 |
| Heirloom | Series A | $53M | Mar 2022 |
| Sunfire | Series D | $109M | Oct 2021 |
 Solugen | Series C | $350M | Sep 2021 |
| Solugen | Growth | $357M | Jan 2018 |
 Solugen | Series C | $350M | — |
| HHeirloom Carbon | Series B | $150M | — |
| SSvante | Series D | $75M | — |
| SSage Geosystems | Series A | $44.8M | — |
| Air Company | Series B | $69M | — |
Top Co-Investors
Toyota Ventures6 shared
Lowercarbon Capital5 shared
Breakthrough Energy Ventures4 shared
Ahren Innovation Capital4 shared
JetBlue4 shared
Chevron Technology Ventures3 shared
GIC Private Limited3 shared
Fifty Years3 shared
Baillie Gifford3 shared
Ormat Technologies3 shared
In-Q-Tel3 shared
Lightrock3 shared
Horizons Ventures2 shared
Saudi Aramco2 shared
Hanaco Ventures2 shared
GOOSE Capital2 shared
Evok Innovations2 shared
Equinor2 shared
Last updated: 20 October 2026