Top 50 CleanTech Angel Investors in United States in April 2025

David E. Weekly is the Head of The Capital One Lab of Capital One. He previously worked at Medcorder as a Founder and CEO. David E. Weekly attended Stanford University.

Bill Gates is the Co-chair of Bill and Melinda Gates Foundation. He attended Harvard University.

Venture Capitalist, Managing Partner, Chief Technology Officer

Warren Buffet is a businessman and investor. He was born Warren Edward Buffett on August 30,1930, in Omaha, Nebraska. Buffett's father Howard worked as stockbroker and served as U.S. Congressman. His mother, Leila Stahl Buffett, was a homemaker. Buffett was the second of three children and the only boy.Buffett demonstrated a knack forfinancial and business matters early on in his childhood. Friends and acquaintances have said the young boy was a mathematical prodigy, and was able to add large columns of numbers in his head-a talent he still occasionally shows off to friends and business associates.Warren often visited his father's stockbrokerage shop as a child, and chalked in the stock prices on the blackboard in the office. At 11 years old he made his first investment; he bought three shares of Cities Service Preferred at $38 per share. The stock quickly dropped to only $27, but Buffett held on tenaciously until they reached $40. He sold his shares at a small profit, but regretted the decision when Cities Service shot up to nearly $200 a share. He later cited this experience as an early lesson in patience in investing.By the age of 13, Buffett was running his own businesses as a paperboy and selling his own horseracing tip sheet. That same year, he filed his first tax return, claiming his bike as a $35 tax deduction.In 1942, Buffett's father was elected to the U.S. House of Representatives, and his family moved to Fredricksburg, Virginia, to be closer to the congressman's new post. Buffett attended Woodrow Wilson High School in Washington, D.C., where he continued plotting new ways to make money. During his high school tenure, he and a friend purchased a used pinball machine for $25. They installed it in a Washington, D.C. barbershop and, within a few months, the profits of the machine allowed Buffett and his friend to buy other machines. Buffett owned three machines in three different locations before he sold the business to a War Veteran for $1,200.Buffett enrolled at the University of Pennsylvania at the age of 16 to study business. He stayed two years, moved to the University of Nebraska to finish up his degree, and emerged from college at age 20 with nearly $10,000 from his childhood businesses.Buffett attended Columbia University for his advanced degree and in 1956, shortly after graduation, he formed the firm Buffett Partnership in his hometown of Omaha. His investment successes, particularly in buying undervalued companies whose stocks shortly began to rise, made him extremely rich and gained him the sobriquet, "Oracle of Omaha." Other notable career succeses include helping rescue Salomon Brothers from corporate raiders (1987) and taking charge of the New York City house (1992) in the wake of an insider trading scandal.In June 2006, Buffett made an announcement that he would be giving his entire fortune away to charity, committing 85 percent of it to the Bill and Melinda Gates Foundation. This donation became the largest act of charitable giving in United States history.The majority of Buffett's considerable fortune was amassed through Berkshire Hathaway, a company for which he is the largest shareholder and CEO. Ranked as Forbes' wealthiest man in 2008, his net worth is estimated at more than $62 billion.Source:

Edward Kim

Ashley Mayer is the Operating Council at Mixing Board . Ashley Mayer attended Georgetown University.

Healthcare M&A investment banker at Juniper Advisory. Previously Morgan Stanley & Northwestern University - Kellogg School of Management.

Luigi Bajetti is the managing partner and founder of Lombardstreet Ventures, an early-stage venture capital firm in Menlo Park, California.Luigi is a serial entrepreneur with over 25 years of experience in the tech and internet industries, with a wealth of knowledge and expertise in building and scaling startups.As a full-time investor since2013, he has been leveraging his experience and insights to identify and support the next generation of Silicon Valley founders. With a passion for backing game-changing technologies and a talent for spotting emerging trends, Luigi has a proven track record of success in identifying groundbreaking startups. He has invested almost always at the earliest possible stage of seed in 20+ US startups valued at over $30 billion combined, including 9 that have since become unicorns.

Eugene Goldberg

Luke Kupersmith - President & CEO @ Lojistic

Jeffrey Preston Bezos is the Founder of Blue Origin. He previously worked at Cashican People LLC as an Investor. Jeff Bezos attended Princeton University.

Mark Cuban is the founder of Fireside, Chairman and Founding Partner of AXS TV, and the Owner of Dallas Mavericks. He previously worked at Broadcast.com as a Co-Founder. Mark Cuban attended the Indiana University Bloomington.

Marc Tarpenning is a member of the advisory board at Clearpath Robotics , a manufacturer of unmanned vehicles for industrial research and development applications. He also provides services as an advisor to many other companies. Previously, he was a mentor at Greenstart.Marc is a Venture Partner at Spero Ventures. He was previously anentrepreneur in residence at Mayfield Fund before he joined Greenstart. Prior to that, he co-founded and served as the vice president for engineering at Tesla Motors. He also held executive positions at Packet Design, NuvoMedia, and Gemstar-TV Guide.Tarpenning holds a bachelor’s degree in computer science from the University of California, Berkeley. He lives in San Francisco, California, United States.

Elizabeth Cutler and her partner Julie Rice were determined to find an alternative to the fitness routines that felt like work. In 2006, they created SoulCycle, a workout that combines inspirational coaching with high-energy music and a full body workout on the bike. Today, riders of all ages have responded to the SoulCycle cardio party withover 60,000 people riding at SoulCycle every week. Elizabeth was honored as one of Goldman Sachs' 100 Builders + Innovators in 2013 and 2014, and SoulCycle was voted one of the World's Top 10 Most Innovative Companies in Fitness of 2013 by Fast Company.In 2015, Elizabeth was voted one of Fast Company's Most Creative People in Business.

Justin Hamilton is Founder, CEO at Clutterbot.

Kathy Fields is the Co-Founder of Alchemee. Kathy Fields attended Taylor University.

Dr Rand Hindi is an entrepreneur and investor in 50+ deeptech and web3 companies. He is the CEO at Zama, a homomorphic encryption startup. Rand started coding at the age of 10, created a social network at 14, and started his PhD at 21. He then created Snips, the first private-by-design voice assistant, which was acquired by Sonos. He was electedan MIT TR35, a Forbes “30 under 30”, and was a lecturer at Sciences Po in Paris as well as a member of the French Digital Council.He holds a BSc in Computer Science and a PhD in Bioinformatics from University College London (UCL).

Bill Gates is the Co-chair of Bill and Melinda Gates Foundation. He attended Harvard University.

Elon Musk has co-founded companies such as SpaceX and tunneling startup The Boring Company, and has played served as CEO of Tesla Motors since 2008. He previously worked as a sales manager at many enterprise LLCs. Elon Musk attended the University of Pennsylvania and received bachelor's degrees in economics and physics.

Katie is the Founder and General Partner of Moxxie Ventures. Prior to Moxxie, Katie served in numerous executive operating roles at Twitter, Google, Yahoo, and Color. She has led teams in marketing, comms, recruiting, product and media. In addition to working in Silicon Valley, Katie served in the (Obama) White House and State Department andbegan her career as a banker at JP Morgan Chase. Katie sits on the Board of Vivendi, a French multinational media company headquartered in Paris, and previously served on the Board of Time Inc. Katie started her venture career as a Founding Partner of #Angels and has invested in 40 early-stage companies including Airtable, Cameo, Carta, Coinbase, Literati, Modern Fertility, Shape Security and Threads.

Ashton Kutcher is an actor, investor, entrepreneur, producer and philanthropist.Kutcher has been named one of TIME magazine’s “100 Most Influential People in the World,” as well as being honored by Vanity Fair ‘s “New Establishment List,” which identifies the top 50 of an innovative new breed of buccaneering visionaries, engineering prodigiesand entrepreneurs. Twice, Kutcher was named one of Forbes magazine’s “World’s Most Powerful Celebrities,” as well as one of Fast Company magazine’s “Most Creative People.”Kutcher has been investing in technology for over a decade, both as an angel investor and a founding partner of A-Grade Investments and Sound Ventures. His fund portfolio includes Airbnb, Uber, Flexport, Brex, Robinhood, Bird, Airtable and Affirm among others.Kutcher is also the co-founder of Thorn: Digital Defenders of Children (www.thorn.org). Thorn drives technology innovation to fight the sexual exploitation of children.Kutcher currently stars in the Netflix original series, The Ranch. He also serves as Executive Producer. Until 2015, Kutcher starred in the CBS comedy series Two and a Half Men. The show ranked as the second most-watched comedy on all of network television. Kutcher first gained recognition as Michael Kelso on the Fox series That 70’s Show, and went on to star in a variety of box office hits on the big screen – including What Happens In Vegas with Cameron Diaz, The Guardian with Kevin Costner, No Strings Attached with Natalie Portman and the cult hit Dude, Where’s My Car.Kutcher served as co-creator and producer of MTV's hit series, “Punk'd,” and The CW's reality series “Beauty and the Geek” and “True Beauty.” He has also produced films such as No Strings Attached, Killers and The Butterfly Effect. Additionally, Kutcher co-founded APlus, a digital media company devoted to spreading the message of positive journalism, a kind of storytelling that focuses on our shared humanity. In 2016, APlus was purchased by Chicken Soup for the Soul.

Computer Scientist & Engineer, Serial Tech Entrepreneur (3x), Investor. Founded and served as CEO of 3 companies in the industries of software, AI / ML, Agricultural Technology, Robotics / Hardware.Harvard University Class of 2019/2020Also interested in: Computer Networks, Economics (particularly Game Theory and BehavioralEconomics)

Entrepreneur & Angel Investor

David Mytton is CEO of Console which helps developers find the best tools. He is an angel investor in early-stage developer-first startups.From 2009-2018, David was Co-founder & CEO at Server Density, a SaaS infrastructure monitoring startup. David built the original version of Server Density, including the open source monitoring agent andcustom time series database used by 700+ customers to manage mission critical IT environments. He grew the company in the UK and US through bootstrapped revenue and subsequent VC funding through to exit in 2018 to a US edge computing business, StackPath.David is also working towards an Engineering Science PhD in sustainable computing at the University of Oxford. His research has been featured in The Times, WSJ, Financial Times, Fast Company, Computer Weekly, and Sky News.

Dwayne “The Rock” Johnson is the new Investor of Salt and Straw and the Co-Founder of ZOA Energy. He is also known by his ring name, The Rock, is an American-Canadian actor, producer, and retired professional wrestler.Mr. Johnson was a professional wrestler for the World Wrestling Federation for eight years prior to pursuing an acting career. Mr.Johnson also attended the University of Miami.

Andy Smith is the Advisor at Nubix.

Jane Woodward, managing partner of WovenEarth Ventures and adjunct professor at Stanford University.

Tobi Lütke founded Shopify in 2004. He has served as the Chief Executive Officer since 2008. Tobi worked on the core team of the Ruby on Rails framework and has created many popular open source libraries such as Active Merchant.

David Bettner - Board Member @ Playful Studios

blah - teh software was teh busted and they didn't want to fix it or hire someone to fix it, odd folks, these.

Peter Yolles

Before founding zulily, Darrell spent almost a decade at Blue Nile, where he was CTO and SVP of Marketing. In 2009, he spent a year at Microsoft leading the BizTalk Server business. Previously, he was at Starwave, a Seattle-based internet company, working on large web properties including ESPN.com and ABCNews.com. He attended the University ofVictoria. When he's not at zulily, Darrell's favorite thing to do is spend time with his young son and daughter, especially on trips to visit family in Canada and Ireland.

Mamoon Hamid is a Partner at Kleiner Perkins. Mamoon previously worked at Slack as a Board Director. He attended Harvard Business School, Stanford University, and Purdue University.

Bhavik Bajaj

Jason Haider: Founder and CEO @ Xenco Medical

Mr. Coors is the founder and CEO of Steelhead Composites LLC. Previously, he was Principal at 9th Street Capital, a venture capital and private equity fund.Mr. Coors spent 6 years as Corporate Economist and Investment Strategist at Qualcomm Incorporated, a Fortune 500 company. Prior to joining Qualcomm, for 5 years he served as the Director ofResearch at Laffer Associates, a money management and institutional economic research and consulting firm. He serves on various corporate Boards and has received numerous awards in industry including being named one of Treasury and Risk magazine‘s ’40 under 40’ Upwardly Mobile Finance Execs in 2007.Mr. Coors is a CFA Charterholder. He holds a Master’s degree in Economics from the University of California, San Diego and a Bachelor’s degree from Colorado State University.

Bootstrapped Debt Financing

Darren leads Google’s Global Customer Acquisition organization. Prior to joining Google, Darren was a Partner at McKinsey & Company.Darren is active in the aviation community. In addition to his Board position with the EAA, he serves as an appointed Board member for the Hiller Aviation Museum in San Carlos, CA. As president of theNorthern California Aerobatic Club, he led the Chapter to becoming the largest IAC chapter in the country.Darren has logged over 6,000 hours of flying time, holds an ATP certificate and is a current CFI, and owns several experimental and certified light aircraft.

Greg Richards - Founder and Managing Director @ Arable Capital Partners

Lou Salkind is the Board Member of Schrodinger.Lou Salkind is a Managing Director of D. E. Shaw & Co., L.P. and a member of the Executive Committee of D. E. Shaw & Co., L.P., a global investment firm whose activities center on various aspects of the intersection between technology and finance. Dr. Salkind received his A.B. fromPrinceton University in 1978, where he studied mathematics and physics.His Ph.D. in 1990 from the Courant Institute of Mathematical Sciences at New York University, where he studied computer science and robotics. Dr. Salkind also serves on the board of the Union of Concerned Scientists, a non-profit organization that provides independent scientific analysis on a range of public policy issues.

James is the Co-founder and CEO of thredUP. He attended Boston College, the University of Oxford, Harvard Business School, and Harvard Kennedy School.

Summer Watson is an English operatic soprano.

Will Smith is an actor, producer and musician, two-time Academy Award® nominee four-time Grammy nominee and winner Will Smith has enjoyed a diverse career encompassing films, television and multiplatinum records.Smith’s vast filmography includes transformative portrayals of true-life icons in “Ali,” “The Pursuit of Happyness” and “Concussion.” Hehas headlined an extraordinary list of films, including “Hitch,” “I am Legend,” “I, Robot,” “Independence Day,” “Men in Black I, II, and III” and “Suicide Squad".Currently, Smith can be seen in Walt Disney Pictures “Aladdin” in the iconic role of the Genie. The movie was directed by Guy Ritchie and has made over $1 billion worldwide since its release on May 24, 2019. Smith will next be seen staring in Ang Lee’s action/thriller, “Gemini Man” out this fall. Next year, he’ll grace the screen once again in the beloved franchise, Sony’s “Bad Boys for Life,” premiering around the world in January 2020, in which he will once again reprise his iconic role as Detective Mike Lowrey opposite Martin Lawrence. Smith will next go into production on Warner Brother’s “King Richard” where he will star in the titular role of Richard Williams, the father of renounced tennis stars Venus and Serena Williams.Recently, Smith created the daring Facebook Watch series, “Will Smith’s Bucket List” where he challenges himself to a different item from his bucket list each week, including performing standup comedy with Dave Chappelle, skydiving in Dubai, swimming with sharks, and racing a Formula 1 car in Abu Dhabi. The show was a massive success for the platform. He began his career as a musician selling millions of records worldwide before crossing over into television with the beloved “Fresh Prince of Bel Air.” In 1998 he and partner James Lassiter founded production and management company Overbrook Entertainment, which has produced numerous top film and television projects.In addition to his artistic achievements, Smith is a successful business owner. Along with his wife, Jada Pinkett Smith, he launched a new media venture, Westbrook Inc. This is a cross-platform holding company formed to execute the Smith Family’s global content and commerce business strategy. Westbrook Inc. will encompass subsidiary companies including the existing Overbrook Entertainment, Red Table Talk Enterprises and the recently formed Westbrook Studios, Westbrook Media, and Good Goods, the latter an elevated merchandise business. Additionally he and Jada founded the Will & Jada Smith Family Foundation. WJSFF is a nonprofit, philanthropic organization committed to improving lives and investing in organizations and initiatives that empower traditionally overlooked communities.

Nitesh Banta is the Co-Founder & CEO at B12.

Ex-Apple, ex-Google, ex-BlackBerry product hardware veteran turned parallel-entrepreneur. Currently President and Founder at Omni Venture Labs. #hardware #deeptech #industry4.0 #frontiertech. Prolific inventor with over 50 patents, experienced product and innovation architect. Lover of advanced composites. I am driven to make impossible productspossible, functional and elegant. follow me on LinkedIn for your daily dose of design, manufacturing and engineering innovation.

Vernon Davis - Advisor @ SportsCastr

Jon Oringer is the founder and chairman of Shutterstock.

Global tech startup CXO and board director. Passionate leader who builds and motivates teams to achieve audacious goals with urgency and purpose. Seasoned entrepreneur with USD $350M+ of exits and a track record of driving disruptive tech from launch to rapid scale both in startups and within large organizations. Mentor and force multiplier whosementees have created USD $100B+ enterprise value. Born at 337.10 PPM.

Mark Cuban is the founder of Fireside, Chairman and Founding Partner of AXS TV, and the Owner of Dallas Mavericks. He previously worked at Broadcast.com as a Co-Founder. Mark Cuban attended the Indiana University Bloomington.

Nicolaj Reffstrup is the Founding Partner of Look Up Ventures. He previously worked at Lifestyle and Design Cluster as a Board Member.Nicolaj Reffstrup attended Copenhagen Business School.