John Brennan
Managing Partner, Holly Ventures
John Brennan is an early-stage cybersecurity investor with over a decade of experience in venture capital. Currently building out Holly Ventures to invest in and support cybersecurity entrepreneurs at their earliest stages, John has invested in over 25 security startups, with a focus on supporting founders from day one. John previously served as a Senior Partner at YL Ventures and has also held positions at Data Collective (DCVC), OCA Ventures, and Horsley Bridge Partners. John holds an MBA from the University of Chicago and a Bachelor of Science from Trinity College in Connecticut.
