Michael Sutton is the founder of StoneMill Ventures, a venture capital firm he launched in 2018 after serving as. See sector focus and contact routes.
Michael Sutton is the founder of StoneMill Ventures, a venture capital firm he launched in 2018 after serving as the CISO at Zscaler and spending two decades building pioneering cybersecurity companies like SPI Dynamics and iDEFENSE. The firm invests primarily at the seed stage in disruptive cybersecurity companies, focusing on the Washington, DC metro area while remaining open to global opportunities in the United States and Israel. StoneMill typically participates in seed to Series A rounds with a historical average check size of $4 million and acts as an active investor providing hands-on mentorship alongside capital. Notable portfolio companies include Orca Security, Huntress Labs, GreyNoise, and LimaCharlie, all of which address critical components of the security ecosystem. Sutton’s distinctive point of view centers on backing founders who desire mentorship from operators with deep security experience, a philosophy rooted in his own journey of driving Zscaler’s security model and evangelizing its vision. He is also a co-author of the book “Fuzzing: Brute Force Vulnerability Discovery” and holds numerous cybersecurity patents, reflecting his tec
Details on this investor come from filing and round data held in the StartupFundraising directory, refreshed on ingest. Founders use profiles like this one to qualify fit and to shortlist investors in Arlington.
Investors like Michael Sutton · Full investor directory · Investor access · Company funding database