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

| Investor | Relevant Deals | Geography | Stage | Focus |
| --- | --- | --- | --- | --- |
| David E. Weekly | 3 | United States, Israel | Seed, Angel, Pre-Seed | Robotics, Drones, Aerospace |
| Chris Sang | 2 | United States, Australia, India | Seed, Pre-Seed, Series A | Software, E-Commerce, Mobile |
| Luke Kupersmith | 2 | United States | Angel | CleanTech, Clean Energy, Renewable Energy |
| Bill Gates | 2 | United States, Canada, Israel | Series C, Series A, Series B | Energy, Biotechnology, Manufacturing |
| Edward Kim | 2 | United States | Angel | CleanTech, Clean Energy, Renewable Energy |
| Mark Cuban | 2 | United States, United Kingdom, Singapore | Seed, Series A | Software, Blockchain, Artificial Intelligence |
| Ashley Mayer | 2 | United States, Germany | Seed, Series A, Pre-Seed | Wellness, Health Care, Natural Resources |
| Rand Hindi | 2 | France, United States, Germany | Seed, Pre-Seed | Software, Cryptocurrency, Information Technology |
| Rex Burgdorfer | 2 | United States, United Kingdom | Seed, Series A | Fashion, Real Estate, E-Commerce |
| Jeff Bezos | 2 | United States, United Kingdom, India | Grant, Series B, Series A | Non Profit, Software, Communities |
| Marc Tarpenning | 2 | United States | Series A, Seed, Series D | Renewable Energy, CleanTech, Drones |
| Luigi Bajetti | 2 | United States, Italy, Luxembourg | Seed, Pre-Seed, Series A | Information Technology, Software, Apps |
| Elon Musk | 2 | United States | Series A, Series B, Seed | FinTech, SMS, Transportation |
| Eugene Goldberg | 2 | United States | Angel | CleanTech, Clean Energy, Renewable Energy |
| Warren Buffett | 2 | United States, Taiwan, United Kingdom | Seed, Pre-Seed, Post-IPO Equity | Retail, Health Care, Health Diagnostics |
| David Marquardt | 1 | United States | Series C, Series D | Energy, Mobile, Battery |
| Darrell Cavens | 1 | United States | Seed, Series A | E-Commerce, Consumer Goods, Software |
| Nitesh Banta | 1 | United States, Canada, India | Seed, Series A, Pre-Seed | Software, Information Technology, FinTech |
| Mamoon Hamid | 1 | United States, Canada, Ireland | Series C, Series A, Series B | Software, Enterprise Software, Information Technology |
| Travis Rush | 1 | United States | Seed, Angel | Coffee, Organic, CleanTech |
| Jason Franklin | 1 | United States | Seed, Series A, Series B | Artificial Intelligence, Health Care, Machine Learning |
| Lou Salkind | 1 | United States | Seed | SaaS, Mobile, GovTech |
| Dwayne Douglas Johnson | 1 | United States | Pre-Seed | Sports, Farming, CleanTech |
| Curtis Jackson | 1 | United States | Pre-Seed, Series C | Mobile, Retail, Farming |
| Ashton Kutcher | 1 | United States, Germany, Canada | Seed, Series A, Series B | Software, E-Commerce, Apps |
| Robin Thurston | 1 | United States | Seed | Health Care, Wellness, Gaming |
| Mark Vadon | 1 | United States | Series A, Seed, Series C | E-Commerce, Retail, Health Care |
| Kim Kardashian | 1 | United States | Seed, Pre-Seed, Series A | Farming, Medical, Delivery |
| Bryan Hassin | 1 | United States | Seed | Energy, Shipping, CleanTech |
| Ivanka Trump | 1 | United States, United Arab Emirates | Seed, Pre-Seed, Series A | Education, Farming, CleanTech |
| Nicolaj Reffstrup | 1 | Denmark, United States, United Kingdom | Seed, Pre-Seed | E-Commerce, Fashion, Security |
| Andy Smith | 1 | United States | Seed, Series A | Retail, Computer, Shopping |
| Ernie Chow | 1 | United States | Pre-Seed | FinTech, Finance, CleanTech |
| Alexandra Stanton | 1 |  |  |  |
| Aviram Jenik | 1 | South Korea, United States, Israel | Angel, Seed, Pre-Seed | Software, Information Technology, Cyber Security |
| Tobias Lütke | 1 | United States, Canada, United Kingdom | Series A, Seed, Series B | Software, FinTech, Internet |
| Kathy Fields | 1 | United States | Seed, Series A | Water, CleanTech, Health Care |
| Preston Schell | 1 | United States | Seed | CleanTech |
| Karen Cahn | 1 | United States | Pre-Seed | Fashion, CleanTech, E-Commerce Platforms |
| Sylvain Theveniaud | 1 | France, United States | Seed, Pre-Seed | AgTech, Finance, Aerospace |
| Darren Pleasance | 1 | Australia, United States | Angel, Series B | Coffee, Organic, CleanTech |
| David Mytton | 1 | United Kingdom, United States, Germany | Seed, Pre-Seed, Series A | Software, Developer Tools, Information Technology |
| John Chory | 1 | United States | Series A | Big Data, Internet, Software |
| Will Smith | 1 | United States, United Kingdom, Japan | Series A, Seed, Series C | Financial Services, FinTech, Software |
| Khloé Kardashian | 1 | United States, New Zealand | Angel, Pre-Seed | Water, Farming, Wellness |
| Tim Schumacher | 1 | Germany, Sweden, United States | Seed, Series A | Apps, Internet, SaaS |
| Jason Haider | 1 | United States | Series A | Energy, CleanTech, Industrial |
| Bootstrapped Debt Financing | 1 | United States, Canada, United Kingdom | Pre-Seed, Seed | Software, Information Technology, E-Commerce |
| Eminem (Marshall Mathers) | 1 | United States | Pre-Seed, Series A | Digital Media, Art, E-Commerce |
| Sunmeet Jolly | 1 | United States, Israel | Seed, Series A, Equity Crowdfunding | Software, Internet, Artificial Intelligence |

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