Michael Sutton

An investor and operator in the cybersecurity industry, and founder of StoneMill Ventures and co-founder of Runtime Ventures, focusing on seed-stage cybersecurity investing.

Angel Investor Active null, United States
Last updated 2026-07-20
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Rounds led
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Rounds' value
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About

Michael Sutton is an experienced operator and investor in the cybersecurity industry. He is a Partner Emeritus at Blu Venture Investors and serves on their Cyber Investment Committee and Cyber Fund Investment Committee. He is the founder of StoneMill Ventures, which focuses on seed-stage cybersecurity investing, and co-founder of Runtime Ventures. Prior to his investment career, he was the CISO at Zscaler, a security-as-a-service company, and was part of its founding team. He also helped build SPI Dynamics (acquired by HP) and iDEFENSE (acquired by VeriSign). He holds six patents in cybersecurity technology.

Portfolio

No portfolio companies in this dataset yet.

Investment activity

1 portfolio exit on record.

Portfolio by sector

Cyber Security2

Q&A

What is Michael Sutton's primary investment focus?
Michael Sutton primarily focuses on investments in the Cyber Security sector, with both of his known portfolio companies operating in this area.
Can you name some of Michael Sutton's notable portfolio companies?
Michael Sutton's portfolio includes Grip Security, which raised a $66M Series B, and Build.security, which was acquired.
Has Michael Sutton had any exits from his investments?
Yes, Michael Sutton had an exit in September 2021 when Build.security was acquired by Elastic for $39.3M.
What stage investments does Michael Sutton typically make?
Michael Sutton's investments have primarily been in the Seed stage, with two recorded Seed rounds.
When did Michael Sutton make his most recent known investment?
Michael Sutton's most recent known investment was in April 2021.
What is the business model of Michael Sutton's portfolio companies?
Both of Michael Sutton's portfolio companies, Build.security and Grip Security, operate with a B2B business model.
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Patents

EPO132

GitHub

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