Ari Helgason co-founded Transition Global with his brother David Helgason, Unity Technologies co-founder, creating a rare sibling-led climate tech investing team that positions itself as a family-led, long-term platform for climate investing rather than a one-off fund. He brings an unusually operator-heavy path into climate investing, combining Y Combinator founder experience with top-tier European venture experience at Dawn Capital and Index Ventures, which he now applies to climate and energy infrastructure software with a focus on software-first infrastructure plays rather than only deep hardware. Ari Helgason co-founded Transition Global with his brother David Helgason, Unity Technologies co-founder, creating a rare sibling-led climate tech investing team that positions itself as a family-led, long-term platform for climate investing rather than a one-off fund. He brings an unusually operator-heavy path into climate investing, combining Y Combinator founder experience with top-tier European venture experience at Dawn Capital and Index Ventures, which he now applies to climate and energy infrastructure software with a focus on software-first infrastructure plays rather than only deep hardware.