ACT Venture Capital

ACT Venture Capital is Ireland's most established and most active venture firm, founded in 1994 and headquartered in Dublin. Over three decades it has backed more than 140 Irish and European technology companies, raising over €600M across six funds — including its largest, a €140M fund closed in 2022 — and generating dozens of exits with a combined enterprise value of around €4.6bn. Its limited partners include the European Investment Fund, Enterprise Ireland, the Ireland Strategic Investment Fund and AIB, several of whom have backed the firm for more than twenty years.

Led by Managing Partner John Flynn alongside General Partners Debbie Rennick and John O'Sullivan, ACT invests from seed to expansion stage with cheques up to €10M across software, AI, deep tech, health tech, energy and fintech in Ireland and the UK. Landmark outcomes include the $400M sale of UWB semiconductor company Decawave to Qorvo (2020), the acquisition of digital-mental-health platform SilverCloud Health by Amwell (2021), and SoftBank's €473M investment into connected-vehicle company Cubic Telecom at a €900M+ valuation (2024). Recent active deals include AI pathology company Deciphex and energy-optimisation platform GridBeyond.