Top 50 Climate Angel Investors in United States in September 2025

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.

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.

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.

Roman Smolevskiy is currently the co-founder at BuildTech VC. He was also the founder of Akvapoint. He attended the University of California.

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.

Kevin Moore has 10 years experience as an angel/opportunity investor and operator. Prior to that, he has over 15 years of progressive technology i-banking, corp dev, and CFO experience at startups and $Bn corporates.

Wei Guo, the founding partner of UpHonest Capital, is an active angel investor in Silicon Valley, focusing on early-stage cross-sector investments. He founded Wei Fund in 2015 and UpHonest Capital Fund I in 2016, invested in well-known companies such as Hims&Hers(NYSE: HIMS), Vicarious Surgical(NYSE: RBOT), Knightscope (NASDAQ: KSCP), Checkr,Lime, Boom, Rescale, Dialpad and more. Since 2015, he has invested in over 400 Silicon Valley startups, over 76 companies with valuations greater than 100 million USD, and 23 portfolio companies that have successfully exited.

Daren was the Founder and CEO of InboxDollars, an online marketing company that connects consumers and advertisers in a way that benefits both. He founded the company as a Freshman in college in 2000 and bootstrapped the company to more than $25 million in annual revenues. InboxDollars was acquired by Prodege in 2019. Daren is active in the MNstart-up community as an investor, advisor and mentor.

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

Joanne Wilson has had many careers. She started out in retail, eventually moving to the wholesale arena. She then transitioned to the media side of the technology world, before once again reinventing herself as an investor. She is currently an active angel investor with a portfolio of over 90 companies such as Food52, Sweeten, Vengo, Nestio, Phinand Phebes, Makers Row, Clutter, and Union Station. She has been involved in numerous real estate transactions from beginning to end and continues to make investments in that world. She is also an investor in a few restaurants in the New York area. In addition to these endeavors, Joanne has been involved in various education projects and served as chairperson at Hot Bread Kitchen, non-profit committed to increasing access to the culinary industry for woman and minority entrepreneurs. She also sits on the board of The Highline. Joanne has maintained her very popular blog, www.gothamgal.com for over 11 years and has recently take her talents to the airwaves on her podcast, ""Positively Gotham Gal"". She loves to bake, cook, throw a good party, travel, read, collect art, do the crossword and stay on top of what's happening around the globe and in NYC.Her most successful venture is being married to her best friend, Fred and raising their three kids- Jessica, Emily and Josh

Scott Belsky is currently a Partner at A24, where he leads technology and innovation projects. He previously served as the Chief Strategy Officer and Executive Vice President of Design & Emerging Products at Adobe. He attended Harvard Business School.

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

Venture Capitalist, Managing Partner, Chief Technology Officer

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

Advisory CTO and Angel Investor

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

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

Jason Calacanis is the Founder and CEO of Inside.com and Launch. He previously worked at Weblogs as a Co-Founder and CEO. Jason Calacanis attended Fordham University.

Lauren DeLuca is a Founder and Managing Partner of Motivate Venture Capital, a Chicago-based Pre-Seed and Seed investor.He co-founded a family of niche FinTech firms and was an active Angel investor. In 2012, he co-founded Sailfish Systems, a managed services and market data provider for trading firms, banks, and hedge funds. Sailfish merged withVictory Networks in 2013 to serve clients across the US and Europe. The combined business was ultimately sold to QuantHouse, a Paris-based trading technology provider, in 2017.He co-founded Oxford Intelligence Partners at the beginning of 2015, a boutique stock market-analytics firm. Clients included many Fortune 500 companies before a successful exit to Q4 Inc., a Toronto-based strategic acquirer serving 1000+ clients. His personal Angel portfolio spans a multitude of B2B/B2C verticals and contains over thirty early- and growth-stage businesses, including Chime, HomeChef, TradingView, Appcast, Popular Pays, DeskPass and PostProcess Technologies. He received my MBA from the Kellogg School of Management at Northwestern University and holds a Bachelor of Arts degree in Political Science from the University of Notre Dame where he graduated Cum Laude in 2001.

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

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.

Kevin Love is an American basketball player for the Cleveland Cavaliers of the National Basketball Association.

Erik Peterson is the Founder at DormTrader.

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.

Gokul Rajaram is a founding partner at Marathon Management Partners and Board of Director of Niural.

Ozzy Akay

Sahil is the founder and CEO of Gumroad.Gumroad exists to help every creative earn a living selling the stuff they make directly to their audience.Previously, he was early at Pinterest — a service that lets users collect, organize, and share the things they are into — and worked on turntable's mobile apps.He designs and buildsproducts for fun and profit.

Mitchell Kapor is the Partner of Kapor Capital. He previously worked at Generation Investment Management as an Advisory Board Member. Mitchell Kapor attended MIT Sloan School of Management.

Paul Buchheit co-founded social network aggregator FriendFeed, along with three other former Google employees. He is also an investor in FriendFeed and participated in a $5 million Series A round in February 2008.He was the 23rd employee at Google, where he created Gmail and implemented many of its innovative features. He developed the originalprototype of Google AdSense, and was responsible for Google's famous "Don't be evil" motto in a meeting.

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.

Jon Oringer is the founder and chairman of Shutterstock.

David Hodge is the CEO at Standard Fleet

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.

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

Nat Turner is the Chairman and CEO of Collectors. He joins the Board of Directors at GameStop. Before co-founding Flatiron, Nat was Co-Founder and CEO of Invite Media, an advertising technology company based in NYC. Invite Media built the industry's first enterprise advertising platform for buying and optimizing online media in real-time.Invite Media was acquired by Google in 2010. Prior to Invite Media, Nat started numerous internet companies and also worked at Say Media and First Round Capital. An active angel investor, Nat has invested in over 30 technology startups throughout the country, including Bell Biosystems, Breakthrough, Care at Hand, DocPhin, Doctor Evidence, Genomera, Meddik, Oscar, and Predilytics. Nat earned a Bachelor of Science degree cum laude in Economics with concentrations in Entrepreneurship and Marketing from The Wharton School of the University of Pennsylvania. In his spare time, Nat is an avid golfer and tries to trick trout with fake bugs.

Leonardo DiCaprio is an American actor and film producer. He has been nominated for three Academy Awards and nine Golden Globe Awards. He won the Golden Globe Award for Best Actor for his performance in The Aviator (2004), and has been nominated by the Screen Actors Guild, Satellite Awards, and the British Academy of Film and Television Arts. Acommitted environmentalist, DiCaprio has received praise from environmental groups for his activism. At the 2007 Oscar ceremony, DiCaprio and former Vice President Al Gore announced that the Academy Awards had incorporated environmentally intelligent practices throughout the planning and production processes, and on July 7, 2007, DiCaprio presented at the American leg of Live Earth.

Josh Felser is the Co-Founder of Climactic. He previously worked at State of California as a Task Force Member. Josh Felser attended Duke University.

Michael E Marks is the Founding Managing Partner at Celesta Capital. Prior to that, he was the CEO and founder of Katerra. He was also the founding partner of Riverwood Capital, a Menlo Park-based private equity firm. Prior to establishing Riverwood, he was a partner and senior advisor at Kohlberg Kravis Roberts & Co. in 2006 and 2007.Priorto KKR, Michael spent 13 years as CEO and then chairman of Flextronics International Ltd., building it into one of the largest technology companies in the world.He is a director of The Melt, Enjoy, H20.ai, and Berkeley Lights.

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.

Sierra is a Founding Partner at Voyager Ventures.

Josh Buckley is the CEO of Product Hunt.

Lior Ron is senior director at Uber since it acquired Otto, which he co-founded along with Claire Delunsay and Don Burnette. Prior to this Lior worked as the product lead for Google's local efforts. He has spent the last 12 years innovating in the geo industry where he was the CTO of the Israeli Intelligence mapping and search unit,product manager at Yahoo, founder of a geo search startup and in the last 4 years part of the Google geo leadership team. He holds an MBA from Stanford GSB, BSc and MS from the Technion – the Israeli institute for technology. He’s also involved in the emerging private space industry as an investor and advisor for few startups as well as product lead for Google's space products (sky, moon)

John Legend is a nine-time Grammy Award winning recording artist, critically-acclaimed concert performer, philanthropist/social activist, and was named one of Time magazine’s 100 most influential people. Legend’s debut album, Get Lifted (2004) sold more than three million copies worldwide and earned an astounding eight Grammy nominations withthree wins for Best New Artist, Best Male R&B Vocal Performance and Best R&B album. Legend’s follow-up album, Once Again (2006) earned RIAA platinum certification and a Grammy Award for Best Male R&B Vocal Performance. High off the success of his third consecutive Top 10 album, Evolver (2008), Legend embarked on an extensive world tour with an 11 piece band - his largest traveling show to date. Inspired by the monumental 2008 Presidential election, Legend teamed up with The Roots to release the socially conscious album, Wake Up! (2010.) The album was nominated for five Grammy Awards and won Best R&B Album, Best Traditional R&B Vocal Performance and Best R&B song (for “Shine”- an original composition also featured in Academy Award-winning director Davis Guggenheim’s documentary film Waiting for Superman) along with two NAACP Image Awards for Outstanding Album and Outstanding Duo, Group or Collaboration. In 2007, Legend launched the Show Me Campaign, a nonprofit organization fighting poverty around the world. John also sits on the Boards of The Education Equality Project, Teach for America, and the Harlem Village Academies. Legend has been honored several times for his activism, including the 2010 BET Humanitarian of the Year award, the 2009 CARE Humanitarian Award for Global Change, and the 2009 Africare’s Bishop John T. Walker Distinguished Humanitarian Service Award. In early 2012, Legend released one of the hottest songs of his career, the RIAA gold-certified hit “Tonight (Best You’ve Ever Had),” which sat atop the Urban AC radio chart for six consecutive weeks. Legend recently released his fifth studio album Love in the Future, with executive producers Kanye West and Dave Tozer, and will embark on a North American tour this autumn.

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

Patrick Collison is a CEO of Stripe.

Edward Lando is the founder of Pareto Holdings. He previously worked at Horizons School of Technology as a co-founder. Edward Lando attended the Wharton School.

Nat Friedman is an entrepreneur and developer. He attended the Massachusetts Institute of Technology. Nat Friedman has two degrees from MIT and has been writing software for 27 years. Nat Friedman is passionate about building products that delight customers with love and attention to detail.In 1999, he co-founded Ximian with Miguel de Icaza. Natwas a co-founder and chairman of the GNOME Foundation. At Novell, Nat ran engineering for a $110M product and served as CTO of the Linux business.

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.

Risk Management professional, experienced in Stress Testing and Capital Planning. Economist, Investment Analyst, Financial Consultant. Interested in FinTech.

Christian Dahlen is a business angel. He provides expert capital and venture advice to B2B SW startups in Silicon Valley and in Germany. He is a member of the Band of Angels, Silicon Valley's oldest seed funding organization. Christian was a VP at SAP and held various roles in business strategy and operations. Prior to SAP, he was theGeneral Manager for the Internet and phone business of Kabel Deutschland (KDG), Germany's largest cable operator. He joined KDG from Excite@Home, and before that was with McKinsey & Co.