Mark Leslie

Mark Leslie

Mark Leslie, the founder, built the family office from proceeds of his tenure at Veritas Software, which he co-founded in 1982 (later Symantec's storage business) and led as CEO until 2000. The office operates as a single-family vehicle, reflecting Leslie's entrepreneurial background and active angel investing ethos. The office deploys capital primarily through direct equity investments and SPVs across Seed through Series B rounds, with a strong tilt toward enterprise technology. Sector interests span AI/ML, Cybersecurity, Enterprise Software, Digital Health, Robotics & Automation, and FinTech (per confirmed focus tags). Portfolio companies are concentrated in North America — notably the San Francisco Bay Area ecosystem where Leslie has deep network ties. The office does not commit to external fund vehicles or hedge funds. Team structure and total assets under management are not publicly disclosed. No additional offices have been identified beyond the Portola Valley base. The firm does not maintain a public-facing website or LinkedIn presence, and professionals beyond the principal have not been named. Leslie is also known for his philanthropic work through Stanford University — including a named professorship and founding support for the Stanford Center for Professional Development — though those structures are separated from the investment office. Structurally, the Mark Leslie family office operates as a direct-investment vehicle with an unusually broad sector aperture for a single-family office. The absence of external fund commitments and the founder's hands-on reputational network create a sourcing advantage among early-stage tech companies in Silicon Valley, though the office largely operates below the radar compared to multi-family or institutional peers.