Ari Helgason

Ari Helgason is a Partner at Transition, a venture capital firm focused on Seed and Series A climate technology investments, based in London, England. Before joining Transition, he served as a Principal at Index Ventures from October 2016 to March 2021, and previously worked as a Senior Associate at Dawn Capital. At Dawn Capital, he focused on scaling enterprise software companies past $1 million in annual recurring revenue, engaging with portfolio assets like Neo4j, Collibra, and Showpad. As a Y Combinator alumnus, his operational background includes co-founding and serving as Chief Executive Officer of a cloud enterprise software platform that was acquired and rebranded as Uphance. Holding a Bachelor of Science from the London School of Economics, Helgason leverages his dual experience as a SaaS operator and institutional investor to support early-stage climate technology founders.