Top 50 Energy Angel Investors in September 2025

Dr. Johann ‘Hansi’ Hansmann was born in Austria and studied economics in Vienna. He spent the major part of his professional life working as an executive in the pharmaceutical industry in Austria, Germany, UK and Spain. He gathered several years of entrepreneurial experience running successfully his own pharmaceutical company in Spain afterconducting a management buy-out of a big pharmaceutical plant, making an exit in 2003. Since this time he is active as investor and business angel. He currently holds investments with a geographical focus on Austria, Germany, UK and Spain both internet and in the health industry. He led Runtastic, shpock, mysugr and just recently durchblicker and Busuu to extraordinary exits. He was president of the ‘Austrian Angels Investors Association’ until 2021, was awarded 'Best European Early Stage Investor' in 2016 by eban.org and is now based in Vienna and tries to find spare time to ride his mountain bike.

Bhavik Bajaj

oheila is an entrepreneur with C-team leadership experience on project management and pre-master planning of large-scale smart, resilient green infrastructure projects.

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.

Ian was Chief Executive of SSE, one of the UK’s leading utility companies and Scotland’s largest industrial company for over ten years. He stepped down from that position in the summer of 2013. Ian is now Chairman of Infinis Energy plc, a renewable energy company; Independent Chairman of the oil services company, the John Wood group and NovaInnovation; as well as holding various advisory and non-executive positions in other organisations. Ian is a renowned and innovative leader in the energy industry, and was welcomed to Synaptec’s advisory board in July 2016.

A successful serial entrepreneur and early defense tech investor, Jackson Moses currently serves as the Founder and Managing Partner of Silent Ventures, an early stage venture firm that invests in exceptional founders building unrivaled aerospace, defense, and national security startups. He also founded and manages Silent Capital, a privatesyndicate that provides its members exclusive access to leading multi-stage defense and frontier tech deals. Additionally, Jackson serves as a Senior Advisor to the founding teams of Castelion and Privateer.Prior to founding Silent Ventures, Jackson founded and served as VP of Partnerships at MainStreet (acquired by Employer.com): the first tech company to make R&D tax credits accessible to startups and SMBs via industry-leading workflows and integrations. As a founding executive, he was responsible for developing go-to-market strategies, building a world-class sales organization, managing business development initiatives, and scaling annual revenue to over $30M. To date, MainStreet has employed hundreds of people and helped 2,000+ startups claim over $150M in tax savings, collectively extending their runway by centuries.Prior to founding MainStreet, Jackson founded and served as Chairman & CEO of Spectrum AI, which was acquired by ActiveFence after last being valued at $137M. Spectrum AI pioneered multimodal LLMs, specifically a series of proprietary GPT foundation models, designed to make digital communities more profitable for Fortune 500 owners, marketers, influencers, and their users. Its customer base spanned gaming, dating, and social media, and included Tencent (TCEHY), Pinterest (NYSE: PINS), Grindr (NYSE: GRND), Yik Yak, Wildlife Studios, and The Meet Group, among others.Prior to founding Spectrum AI, Jackson worked in sales (Lynda.com), customer operations, and executive recruiting at LinkedIn (acquired by Microsoft). Prior to this, he worked as a Market Research Analyst at Cisco where he evaluated industry trends, new investment opportunities, and emerging threats to Cisco’s core business lines.Having raised $120M+ across his two companies, Jackson actively advises startups, venture firms, and family offices on private sector aerospace and defense tech trends, investment opportunities, and capital allocation strategies. He serves as a Venture Partner to several large firms and has sourced deals for 8VC, Founders Fund, a16z, Lightspeed, NEA, Quiet Capital, Susa Ventures, family offices, defense primes, and university endowments.Jackson holds two B.A. degrees from the University of California, Berkeley where he studied Economics, with a concentration in monetary policy, and Political Science, with a concentration in game theory.

Kiran Bhatraju is the Founder and CEO of Arcadia. Kiran has a BA from the University of Pennsylvania.

Ahu Serter is the Founder and President of Fark Labs. She previously worked at FARHYM Vehicle Interiors as a Head of Management Committee, Board Member. Ahu Serter attended Pace University.

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

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

As the CEO of Climate Transition Swiss AG, I lead a Swiss company that develops and finances green, resilient infrastructure projects across North America, Europe, and Japan. With over 20 years of international business experience, I have a strong track record of delivering sustainable energy solutions that create positive environmental and socialimpact.In addition to my role as CEO, I am also a Lobbyist for Climate Policy at the U.S. House of Representatives, where I focus on influencing environmental initiatives in Japan and Europe. I am passionate about advocating for climate action and fostering global collaboration on this urgent issue. I am also a member of the Forbes Business Council and a regular contributor to their climate section, where I share my insights and expertise on green business and policy.

Jeff Dean is the Chief Scientist of Google DeepMind and Google Research. He joined Google in 1999 and has played a pivotal role in shaping the company’s technical foundations. He currently focuses on advancing AI and deep learning research across Google’s research teams.He co-founded and led the Google Brain team, helping drive innovations indeep learning for speech recognition, computer vision, natural language understanding, and a wide range of predictive applications. Over the years, he has co-designed and implemented several generations of Google's core systems, including its web search infrastructure, crawling and indexing pipelines, and advertising technologies such as AdSense for Content.He is also a key contributor to Google's distributed computing infrastructure, having co-designed and implemented systems like MapReduce, BigTable, Spanner, Protocol Buffers, LevelDB, and TensorFlow—one of the most widely used open-source machine learning platforms.Jeff Dean earned his Ph.D. in Computer Science from the University of Washington in 1996. He is a Fellow of the ACM, a member of the U.S. National Academy of Engineering and the American Academy of Arts and Sciences, and a recipient of the ACM-Infosys Foundation Award in the Computing Sciences and the Mark Weiser Award.

Sagar Ratilal Bavarva is the Director and Researcher of Aasan Group of Companies. He previously worked at the World Economic Forum as a Digital Associate - Remote. Sagar Ratilal Bavarva attended Harvard Business School.

Angel / Sophisticated Investor and Trader (Ex London Stock Exchange(LSE), Deutsche Bank, London Clearing House(LCH) ) , Invested in 60+ Startups / 4 successful exits (with Avg 20x) and counting more. (Web3 -> udaybs.ETH )Invested in following asset classes from past 2 decades across UK / India / US / Europe / -Private Equity (Seed / Growth / VC/ Acquisition / Merger) - Equity Markets - Real Estate - FX - Commodity - Bonds - Fintech, Blockchain, Crypto Market, Web3 , DeFi, NFT - Derivative Markets / Hedging / F&O / CFDGrowing Wealth in bumpy economic rides - There is no secret formula. Investment is an art. Being vigilant, dynamic, connecting dots, evaluating risk with constant change, loads of patience and visualising medium to long term.Private Equity Investments across globe in following domains / categories: - Energy - EV / Carbon Footprint - Blockchain / FinTech / AI / ML / Web3 / DeFi - D2C / B2C - Food & Beverages - Pharma - Media & Entertainment

Alfred Luger

Dylan Taylor is based out of Denver, Colorado, and is the Chief Executive Office and Chairman at Voyager Technologies. Dylan Taylor attended University of Arizona.

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.

Venture Capitalist, Managing Partner, Chief Technology Officer

Jeremy is a full time angel from Singapore who invests across USA/Canada, Europe, and Israel.

David is a technologist, the founder of Unity Technologies, non-exec director to others, and a restless entrepreneur with a passion for creating feedback loops between innovation and teams and products, applying new and old business models to changing industries, and pushing people to do the very best they can do.David's background is inprogramming, an assortment of university dabbling, creating companies, and helping entrepreneurs. He served as CEO of Unity Technologies since co-founding it in 2003 and until October 2014, with an unflinching vision to democratize game development, and to develop technology and business models for the next phase of the games industry. David Helgason attended the University of Copenhagen.

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).

Managing Partner @ Jolly VC, LLCFounder and Patent holder - GROTU mobile app @ 101 Islands LLC. Angel investor in 44 pre-IPO technology startups. Frequently invited by accelerators and angel forums to Judge startup competitions and discuss technology innovation. Former IT Consulting industry executive who sold hundreds of millions of dollars inconsulting services to Fortune 500 companies working for Cap Gemini, HCL, L&T, NTT data.

Akshay Singhal is the Co-Founder and CEO at Log 9 Materials a sub-organization of Log 9 Spill Containment.

Tom McInerney is a notable angel investor. He was a seed investor in Segment, Notion, GetAround, Tala, MemSQL, Mode Analytics, OpenTrons, Arcadia Power, and more.

Jordan Mendell is the chief product officer and head of mobile products at Mendell studied organic chemistry at the University of Colorado atDenver.

Rayyan Islam is the Co-Founder and General Partner at 8090 Industries. As serial entrepreneur, investor and advisor focused on industrial technology and the low-carbon economy, the companies Rayyan's invested in, sourced and advised have grown to over $8B in market value and have gone to raise further financing from the likes of SequoiaCapital, Union Square Ventures, Lux Capital, Andreessen Horowitz, Venrock, Khosla Ventures and Bill Gates's Breakthrough Energy Ventures. Rayyan previously spent time helping source technology investments for multiple family offices globally, particularly focused towards industrialists based in the Texas and American midwest region and began his VC career at leading East Coast seed stage venture firm, Romulus Capital, where he sourced the firm’s most valued investment, EquipmentShare.A product manager by trade, he worked stints at Spotify, was on the founding team of a subscription airline and began his career supporting M&A transactions for industrial clients at Deloitte as well as economic developments efforts for Deloitte Consulting’s Emerging Markets Practice. Rayyan is a Forbes 30U30 Fellow, served as a United Nations Youth Delegate and is a recipient of the Outstanding Youth Delegate Award.Influenced by his family upbringing in Bangladesh, he personally witnessed energy security issues and the ramifications of climate change at a young age and its impact on communities around the world. Determined to make a serious dent on the issue, Rayyan supports a cadre of climate solutions, drafted policy recommendations to President Joe Biden’s climate transition team and is the editor of Decarbon Weekly, a decarbonization focused newsletter which counts leading climate scientists, members of state and local governments, climate tech founders and ESG focused investors and foundations amongst its subscription base. Rayyan co-founded the industrial decarbonization fund at 8090 Partners, in partnership with prominent industrial and energy families from around the world to invest, support and accelerate breakthrough technology companies decarbonizing every industrial sector driven by radical economic advantages.Rayyan and his work has been featured on Bloomberg, Yahoo Finance, Huffington Post and Forbes.

Bradley Horowitz is an Advisor and Vice President of Product Management at Google. Most recently he helped create Area 120, Google's incubator for internally-sourced innovation. He's led a large number of products, programs and initiatives at Google - including Google for Startups, Google Photos, Gmail, Google Voice, blogger, and GoogleNews.Before joining Google in February 2008, Horowitz was Yahoo's vice president of Advanced Development where he drove the acquisitions of Flickr and MyBlogLog, launched the Brickhouse incubator and developed new products like Yahoo! Pipes. Additionally, he was responsible for the company's initiative to open up its platform which included overseeing the Yahoo Developer Network (YDN).Previously, he was co-founder and CTO of Virage, where he oversaw the technical direction of the company from its founding through its IPO and eventual acquisition by Autonomy.Horowitz was a PhD candidate at the MIT Media Lab. While at the Media Lab, he worked on a number of topics related to computer vision, graphics and image processing, which resulted in a patented new technique for the recovery of structure, motion and camera parameters from video sequences.Horowitz holds an MS in Media Science from MIT and a BS in Computer Science from the University of Michigan.

Sierra is a Founding Partner at Voyager Ventures.

Paul Forster

Investor | Storyologist | Builder

Managing and Founding Partner of Ideosource Venture Capital, an Indonesia focused venture capital firm dedicated on early-stage to later-stage investments.

Erik Peterson is the Founder at DormTrader.

Eric Schmidt is the CEO of Relativity Space. He is the founding partner of the Schmidt Family Foundation. He previously worked at Alphabet Inc. as an Executive Chairman and Technical Advisor. Eric Schmidt attended Princeton University.

Early-Stage Tech Investor; Sustainability; Ex-Mortgage Backed Securities Trader, Columbia MBA, 50 countries.

Gary R. Hirshberg, Ph.D., Co-Founded Spiffly, Inc. in 2014. Gary Hirshberg serves as a Partner at Bessemer Venture Partners. He serves as an Advisor at Renewable2 Management Company and Renewal2 Investment Fund. Gary Hirshberg co-founded Stonyfield Farm, Inc. (Stonyfield Farm Yogurt) in September 1983 and served as its Chief Executive Officer,since September 1983 until January 2012, President, since 1989. He oversaw Stonyfield's phenomenal growth, from its infancy as a seven-cow organic farming school to its $330 million in annual sales. In 2001, Stonyfield Farm entered into a partnership with Groupe Danone and in 2005, he was named Managing Director of Stonyfield Europe. He served as Director of the Rural Education Center at Stonyfield. Gary Hirshberg was a Managing Director at Stonyfield Europe. Previously, he served as an Executive Director at The New Alchemy Institute. He has extensive experience as an environmental activist, including terms as the Founding President of the Cape and Island Self Reliance Corporation and as the Founding President of the Cape Cod Environmental Alliance. Prior positions include serving as a Water-Pumping Windmill Specialist and an Environmental Education Director at the US Fish and Wildlife Service. Gary Hirshberg served as an Advisor at Renewal Partners LLC, Solera Capital, the Heinz Center Leadership Summit and the Corporate Ecoforum. Gary Hirshberg is Co-Founder and Chairman of O'Naturals. He served as the Chairman of Stonyfield Farm, Inc. He served as the Chairman of The Social Venture Network. Gary Hirshberg serves on several corporate and non-profit Boards including Applegate Farms, the Dannon Company, Honest Tea, Peak Organic Brewing Company, The Full Yield, Climate Counts, Stonyfield Europe, Ltd, Glenisk, Ltd, Solera Capital and Sambazon. He serves as Member of Advisory Board at Spiffly, Inc. He has been a Director at Blue Apron, Inc. and since February 27, 2017 Blue Apron Holdings, Inc. since October 2016. Gary Hirshberg serves as Director of Sweetgreen, Inc., Danone Communities and Quantum Designs, LLC. He serves as a Director of Ramp Sports LLC and The Full Yield, Inc. He served as a Director of Stonyfield Farm, Inc. Gary Hirshberg served as a Director of Monogram Energy, Inc. since June 1995. He served as a Trustee of Leadership New Hampshire, Inc. He serves as a Member of the Advisory Board of Simon Equity, LLC. He serves as Member of Social Advisory Board at Commons Capital Management LLC. Gary Hirshberg served as a Director of the New Hampshire Audobon Society and the Association for the Preservation of Cape Cod. Gary Hirshberg is the Author of the book Stirring It Up: How to Make Money and Save the World. He is a frequent speaker on topics including sustainability, climate change, the profitability of green and socially responsible business, organic agriculture and sustainable economic development. Gary Hirshberg has won numerous awards for corporate and environmental leadership, including Global Green USA's "1999 Green Cross Millennium Award for Corporate Environmental Leadership." He was named "Business Leader of the Year" by Business NH Magazine and "New Hampshire's 1998 Small Business Person of the Year" by the U.S. Small Business Administration. More recently, 2009 was a year of big wins as Gary Hirshberg was named one of "America's Most Promising Social Entrepreneurs" by Business Week magazine, Stonyfield was chosen "Business of the Year - Manufacturing" by Business NH magazine and Stonyfield won an EPA Clean Air Excellence award. He also is featured in 2009's most successful documentary, "Food, Inc." Gary Hirshberg served on the Advisory Panel for Newsweek magazine's Global Environmental Leadership Conference. He has received eight honorary doctorates and was named a Gordon Grand Fellow at Yale University. Gary Hirshberg holds an honorary Doctor of Science from New Hampshire College, an Honorary Doctor of Law from Notre Dame College in Manchester, New Hampshire and a B.A. from Hampshire College.

Tom Werner serves as SunPower’s CEO and chairman of the SunPower board of directors. Prior to joining SunPower, he held the position of chief executive officer of Silicon Light Machines, Inc., an optical solutions subsidiary of Cypress Semiconductor Corporation. Previously, Werner was vice president and general manager of the Business ConnectivityGroup of 3Com Corp., a network solutions company, and has also held a number of executive management positions at Oak Industries, Inc. and General Electric Co. He currently serves as a board member of Cree, Inc., Silver Spring Networks, Silicon Valley Leadership Group, and is a member of the Marquette University board of trustees. Werner holds a bachelor's degree in industrial engineering from the University of Wisconsin, Madison, a bachelor's degree in electrical engineering from Marquette University and a master's degree in business administration from George Washington University.

Sake Bosch is a Founder and Managing Partner of Prime Ventures since 1999. Sake brings over 25 years of experience in marketing and sales and venture capital to Prime. Prior to founding Prime in 1999, Sake was a Senior Principal at Holland Venture and was responsible for managing investments in technology companies. Sake was involved in many ofthe Holland Venture technology investments including Applicare Medical Imaging (acquired by GE Medical Systems), BWise (acquired by Nasdaq), SQL Systems (acquired by Datastream) and Freecom (acquired by Mitsubishi Kagaku Media). Before joining Holland Venture in 1994, Sake worked as an Independent Corporate Finance Consultant focusing primarily on early stage companies. Prior to this position Sake was a Sales Executive at Securitas Group. Sake started his career in 1989 as a Strategic Market Analyst at VNU. Sake serves on the board of directors of Civolution, 4C, Dealerdirect, Digital Origin, Greetz, Forcare, SaaSPlaza, SlimPay and Takeaway.com. Previous investments include: 3mensio Medical Imaging (acquired by Esaoto), eBuddy (acquired by Booking.com), Global Collect (acquired by General Atlantic), MarketXS (acquired by Markit), Nedstat (acquired by comScore Inc.), Tridion (acquired by SDL) and Watermark (acquired by Qurius). Sake holds an M.Sc. degree in Business Administration as well as a B.A. degree in Management Science and Industrial Engineering.

Sam Altman is the CEO and co-founder of OpenAI and CEO of World. He is a Partner of Apollo Projects. Altman was the president of Y Combinator from 2016 through 2019. Sam Altman attended Stanford University.

Technical leader and architect in enterprise software including S&P 500 customers for Microsoft. Built web portals for IBM with Team International, created medical FDA-approved devices with Medtronic over Global Logic. , and certified phone station in telecom business over the globe with Alcatel over Altron. Excellent background in distributedsystems, artificial intelligence, and Big Data. Passionate about tuning robust, high-performance systems that scale well. Two Master's degrees in Technical Management from Foster School of Business - The University of Washington in the USA and also computer science masters from Kharkiv Aerospace University in Ukraine. Slava received customer obsessions awards in Microsoft and always acting as a bridge from business to technology with a pioneering spirit. Viacheslav is passionate about leadership roles on strategic and impact projects with metrics-driven, high-performance, and scalable development. Expert in lean software development - it means rapid, agile prototyping with development cycles that fail fast to learn quickly and to apply innovative solutions in iterations. Clients hire me to develop new software products for innovative markets that are rapidly growing. They know that the best products come from great empathy and customer insights, but also require courage, hard work, and perseverance.

Yun-Fang Juan

business angel // entrepreneur // founder lieferando.de // boardmember booksy.com

Ramez Naam is Chief Futurist and Partner at Prime Movers Lab.

Jon Oringer is the founder and chairman of Shutterstock.

Marc Benioff is Chair and Chief Executive Officer of Salesforce. Marc Benioff attended the University of Southern California.

Daniel Curran is the Founder and CEO at CustEx.com.

Cristina Stenbeck has been the lead shareholder of Kinnevik over the last 20 years. Cristina began her career within the Kinnevik group when she joined her first public portfolio company board in 1997. She became Deputy Chairman of Kinnevik in 2003. Served as Chairman and Executive Chairman of the Board between 2007 and 2016 and still serves on theBoard today. Kinnevik is a family-led entrepreneurial group focused on building digital consumer businesses spanning 80 countries around the world. The six investment focus areas are: Communication, e-Commerce & Marketplaces, Entertainment and Financial Services and it recently added health and education to its current consumer focus. Last year, Kinnevik made its first investment into a digital heath platform called babylon which uses advanced AI to diagnose and treat consumers' medical concerns. Kinnevik's largest investment is its 32% ownership in Zalando, Europe's leading fashion and e-commerce company. Cristina graduated with a B.Sc. from Georgetown University in Washington DC, USA and lives in Stockholm, Sweden with her family and four children.

Walter Robb is the co-founder and co-CEO of Whole Foods Market.

Jon Moulton is a British venture capitalist. He is the founder and managing partner of the private equity firm Better Capital, and is the former managing partner of the private equity firm Alchemy Partners.

Co-CEO at CleanHub, Entrepreneur (Salonmeister, Treatwell, CAYA, Lieferheld/Delivery Hero) and Angel Investor. Passionate about building companies (marketplaces & SaaS), especially in the SMB space.

Gopalakrishnan (Kris to his colleagues) is one of the founders of Infosys Technologies Limited. As Chief Executive Officer, he plays a key role in defining the company strategy and using technology and innovation continuously to maintain its leadership in the industry.On June 22, 2007, Kris took over from Nandan M. Nilekani as the CEO andManaging Director of Infosys Technologies Limited. Kris previously served as Chief Operating Officer (since April 2002), and as the President and Joint Managing Director (since August 2006). His responsibilities included customer services, technology, investments and acquisitions.Kris' initial responsibilities at Infosys included management of design, development, implementation and support of information systems for clients in the consumer products industry in the U.S. Between 1987 and 1994, he headed the technical operations of KSA/Infosys (a joint venture between Infosys and KSA at Atlanta, U.S.) as Vice President (Technical). In 1994, Kris returned to India and was appointed Deputy Managing Director of the company.Kris is currently the Chairman of the Indian Institute of Information Technology and Management (IIITM), Kerala, and Vice Chairman of the Board for Information Technology Education Standards (BITES) set up by the Government of Karnataka. Kris is the Vice Chairman of the Confederation of Indian Industries(CII) Southern Regional Council. He is also a member of ACM, IEEE and IEEE Computer Society.Kris holds a master's degree in Physics and Computer Science from the Indian Institute of Technology Madras.