Douglas M. Leone is an Italian-born American billionaire venture capitalist, renowned for his role at Sequoia Capital, one of the world's leading venture capital firms. Born in Genoa, Italy, on July 4, 1957, Leone immigrated to the United States with his family at age five, settling in suburban Massachusetts. He is an Italian-American Catholic. Leone earned a Bachelor of Science in mechanical engineering from Cornell University in 1979 and a Master of Business Administration from the MIT Sloan School of Management in 1988. He began his career at Hewlett-Packard and later worked at Pilgrim Baxter & Associates before joining Sequoia Capital in 1988 as an associate. Rising through the ranks, he became a general partner in 1996 and served as managing partner from 2012 until stepping aside in 2022, while remaining a general partner. Under his leadership, Sequoia invested in transformative companies such as Apple, Google (now Alphabet), Cisco, Oracle, PayPal, YouTube, WhatsApp, Electronic Arts, ServiceNow, Zoom, and Palo Alto Networks, where he currently serves on the board. Leone's influence extends beyond investments into philanthropy and politics. He has been involved in educational initiatives, serving on boards like the National Venture Capital Association and supporting STEM education programs. Politically, Leone is a notable Republican donor, supporting candidates like Donald Trump and various GOP causes, including donating over $1 million to Trump's 2020 reelection effort, which has drawn criticism in the liberal-leaning tech community. His net worth, estimated at $10.8 billion as of December 2025, stems primarily from his stakes in Sequoia-backed successes. Leone is fluent in English and Italian, reflecting his heritage. He has financial ties to key tech figures such as Nir Zuk, Larry Page, and Sergey Brin through Sequoia-backed ventures and has been involved in undisclosed business ties, including with Roelof Botha, and has consulted for foreign entities, notably in China, raising questions about influence networks in global tech investments. Despite his success, Leone's aggressive investment style and political affiliations have sparked controversies, including debates over Sequoia's China investments amid U.S.-China tensions. Leone is married to Patricia Leone, and they have three children; the family resides in Atherton, California. Despite his prominence in Silicon Valley, Leone maintains a relatively low public profile, focusing on deal-making and long-term value creation in technology and cybersecurity sectors.