Mark Leslie is an angel investor focused on early-stage (pre-seed and seed) “frontier technology” companies in sectors. See sector focus and contact routes.
About Mark Leslie
Mark Leslie is an angel investor focused on early-stage (pre-seed and seed) “frontier technology” companies in sectors including enterprise applications, data management, cybersecurity, applied AI, and HealthTech [2][3][6]. His notable portfolio companies include Pano AI (Series A, 2022), Rubrik, Rigetti Computing (Series C, 2020), HealthTap, and Clumio (exited 2024) [6][10][12]. Leslie’s distinctive thesis centers on investing in deep tech with “fascinating science and technology” that can change the world, leveraging his 30-year track record as a board member of ~50 high-tech firms [3][6].
Mark Leslie at a glance
Role
Angel Investor
Location
Portola Valley, CA, United States
Investor type
Individual/Angel
Focus areas
Mr. Mark Leslie serves as a Managing General Partner in Leslie Ventures. He is an Advisor at Genetic Finance and also a lecturer in management at Stanford Graduate School of Business, where he teaches courses in entrepreneurship, ethics, and sales organization. He also serves as a Board Member at Big Switch Networks. Mr. Leslie was the founding chairman and Chief Executive Officer of Veritas Software. From 1980 until 1990, he served as president and chief executive officer of two Silicon Valley high tech start-up companies. Prior experience includes sales management, sales executive, systems engineer, and software engineer. Mr. Leslie designed and developed the first software hypervisor while employed at IBM in 1969. Mr. Leslie currently serves on the boards of a number of privately-held high technology corporations
Frequently asked about Mark Leslie
What does Mark Leslie invest in?
Mark Leslie (Portola Valley, CA, United States) — sector focus: Mr. Mark Leslie serves as a Managing General Partner in Leslie Ventures. He is an Advisor at Genetic Finance and also a lecturer in management at Stanford Grad….
How do I contact Mark Leslie?
Mark Leslie's published profile links (website, LinkedIn or X where available) are listed on the StartupFundraising.com investor profile.
Where is Mark Leslie headquartered?
Mark Leslie is based in Portola Valley, CA, United States.
Every field above is read from the StartupFundraising firm directory — disclosed location, recorded investments and stated focus — and re-checked as filings arrive. Founders pair it with investors in Portola Valley when building a target list.
