# Top 50 CleanTech Startup Investors in United States in May 2026

| Investor | Relevant Deals | Geography | Stage | Focus |
| --- | --- | --- | --- | --- |
| Third Sphere | 10 | United States, Switzerland, Germany | Seed, Pre-Seed, Convertible Note | Software, Real Estate, Transportation |
| Khosla Ventures | 7 | United States, India, United Kingdom | Series A, Series B, Seed | Software, Health Care, Artificial Intelligence |
| Valo Ventures | 7 | United States, United Kingdom, France | Series A, Series B, Seed | SaaS, Software, Manufacturing |
| Collaborative Fund | 7 | United States, United Kingdom, South Korea | Seed, Series A | Food and Beverage, Health Care, Software |
| Breakthrough Energy Ventures | 6 | United States, Canada, United Kingdom | Series A, Series B | Energy, Renewable Energy, Manufacturing |
| Energy Impact Partners | 6 | United States, Canada, Germany | Series A, Series B, Series C | Software, Energy, Renewable Energy |
| Stout Street Capital | 5 | United States, Canada, India | Seed, Series A | Software, SaaS, Enterprise Software |
| Social Capital | 5 | United States, Canada, India | Seed, Series A, Series B | Software, FinTech, SaaS |
| Climate Capital | 5 | United States, Canada, Germany | Seed, Pre-Seed, Series A | Sustainability, Manufacturing, Biotechnology |
| Shell Ventures | 5 | United States, United Kingdom, Norway | Series A, Series B | Energy, Renewable Energy, Software |
| Kleiner Perkins | 5 | United States, China, United Kingdom | Series B, Series A, Series C | Software, Health Care, Information Technology |
| Powerhouse Ventures | 5 | United States, Australia, United Kingdom | Seed, Series A, Pre-Seed | Software, Energy, Solar |
| Blackhorn Ventures | 5 | United States, Canada, Germany | Seed, Series A, Series B | Software, Information Technology, Artificial Intelligence |
| SaaS Ventures | 5 | United States, Canada, Israel | Seed, Series A, Pre-Seed | Software, Information Technology, SaaS |
| Chrysalix Venture Capital | 5 | United States, Canada, The Netherlands | Series B, Series A | Energy, Manufacturing, CleanTech |
| BoxGroup | 4 | United States, France, Mexico | Seed, Series A, Series B | Software, Health Care, Internet |
| Clean Energy Venture Group | 4 | United States, Canada | Series A, Seed | Energy, Renewable Energy, Manufacturing |
| Central Texas Angel Network | 4 | United States | Seed, Series A | Software, Health Care, Biotechnology |
| Climate Pledge Fund | 4 | United States, India, Italy | Series A, Series B | CleanTech, Energy, Manufacturing |
| SE Ventures | 4 | United States, Canada, Israel | Series B, Series A | Energy, Manufacturing, Internet of Things |
| Firelake Capital Management | 4 | United States | Series A, Series C, Series B | Solar, Energy, Manufacturing |
| DCVC | 4 | United States, Canada, United Kingdom | Seed, Series A, Series B | Software, Artificial Intelligence, Health Care |
| Ideaship | 4 | United States | Seed, Pre-Seed | Software, Health Care, Information Technology |
| City Light Capital | 4 | United States | Seed, Series A, Series B | Health Care, Software, Wellness |
| Cottonwood Technology Fund | 4 | United States, The Netherlands, Germany | Series A, Series B, Seed | Manufacturing, Biotechnology, Health Care |
| Spero Ventures | 4 | United States, Israel | Series A, Seed | Software, Artificial Intelligence, Education |
| RockPort Capital | 4 | United States, Canada, Norway | Series C, Series B, Series A | Energy, Manufacturing, Software |
| ONE WORLD Impact Investments LLC | 4 | United States | Seed, Series A, Series B | Education, Health Care, Software |
| Alante Capital | 3 | United States, France | Seed, Series A, Pre-Seed | Biotechnology, Recycling, Advanced Materials |
| Ground Up Ventures | 3 | United States, Israel | Seed, Series A, Pre-Seed | Software, E-Commerce, Artificial Intelligence |
| Rockies Venture Club | 3 | United States, Canada | Seed, Series A | Software, Health Care, Biotechnology |
| Building Ventures | 3 | United States, Finland | Series A, Seed, Series B | Software, Construction, Real Estate |
| Saint-Gobain NOVA | 3 | United States, Germany, United Kingdom | Seed, Series B | Industrial Manufacturing, Energy, Software |
| Horizons Ventures | 3 | United States, United Kingdom, Israel | Series A, Series B, Seed | Biotechnology, Artificial Intelligence, Software |
| Clean Energy Ventures | 3 | United States, Canada | Series A, Seed, Convertible Note | Energy, Manufacturing, Renewable Energy |
| David E. Weekly | 3 | United States, Israel | Seed, Angel, Pre-Seed | Robotics, Drones, Aerospace |
| Exelon Corporation | 3 | United States | Seed, Pre-Seed, Series A | Software, CleanTech, Clean Energy |
| Austin Ventures | 3 | United States, China, Japan | Series B, Series A, Series C | Software, Enterprise Software, Internet |
| Pinnacle Ventures | 3 | United States, Brazil, Canada | Series C, Series B, Series D | Software, Health Care, Biotechnology |
| AP Ventures | 3 | United States, France, Norway | Seed, Series A | Energy, Renewable Energy, Oil and Gas |
| Robbins Venture Capital | 3 | United States | Seed, Series A | Health Care, CleanTech, Clean Energy |
| Oak Investment Partners | 3 | United States, United Kingdom, China | Series B, Series C | Software, Internet, Telecommunications |
| Active Impact Investments | 3 | Canada, United States | Seed, Series A, Pre-Seed | Software, SaaS, CleanTech |
| Jericho Energy Ventures | 3 | United States | Series A | CleanTech, GreenTech, Clean Energy |
| Milkbox Partners | 3 | United States, Canada, Germany | Series A, Seed | Machine Learning, Software, Information Technology |
| Wonder Ventures | 3 | United States | Seed, Pre-Seed, Series A | Software, Health Care, Internet |
| Sun Mountain Capital | 3 | United States | Series A, Series B, Series C | Medical, Health Care, Manufacturing |
| Launch NY | 3 | United States, Canada | Convertible Note, Seed, Series A | Health Care, Software, Food and Beverage |
| Hess Corporation | 3 | United States | Series A | CleanTech, GreenTech, Clean Energy |
| Good Growth Capital | 3 | United States, France, Israel | Seed, Convertible Note, Series A | Health Care, Information Technology, Software |

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