Location
Ireland, Europe
Check Size
$100K - $5M
Investment Stage
Seed
Series A
Focus Areas
AI
Manufacturing
Payments
Semiconductors
About Investor
John O’Sullivan is a General Partner at Act Venture Capital in Dublin, where he writes $100 K–$5 M seed and Series A checks into payments, manufacturing, semiconductors and AI ventures. He is based in Dublin, Ireland. Before joining Act VC, he spent over a decade in corporate development and strategy roles at European technology firms and advised industrial-tech founders on scaling global operations.
Previous investments
Deciphex
32M |2025
12M |2022
6M |2020
Engage-EHS
2M |2019
830K |2015
Worldnet Payments
2017
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