General Partner
Act Venture CapitalCheck size: €500K-€20M across pre-seed through expansion, as published by Act Venture Capital.
John O’Sullivan invests or supports investment decisions through Act Venture Capital's published strategy: Lead early investments in resilient technology founders who understand their markets, then stay involved as their companies build and scale.
Exceptional teams with deep market understanding, technically differentiated products and the resilience to build globally important companies.
No formal pass list is public. Teams without clear market insight, technology differentiation or early-stage fit appear less aligned.
Show the team's earned insight, customer problem, product evidence, market size, financing plan and why Act should lead early and stay the course.
No writing has been linked yet. Kit can search for posts, interviews, and fund essays worth reading before outreach.
No podcast appearances are linked yet. Ask Kit to check for interviews that reveal how this investor thinks.
Quote coverage is incomplete. Kit can look for direct comments on markets, founders, and investment criteria.
John O’Sullivan is a current General Partner at Act Venture Capital, according to the firm's official roster. This record does not add prior-employer, education, portfolio-attribution or personal-thesis claims that the reviewed official sources do not support.