Josh Grehan

Partner, Helios Climate Ventures
Josh Grehan led a microbiome company through FDA approval and an IPO, now focuses on the battery/energy‑storage stack (critical minerals to recycling), spending ~25% supporting founders as a long‑term partner.
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Josh Grehan
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About Josh Grehan

Josh Grehan grew up in extreme poverty in a log cabin in rural Saskatchewan and leveraged scholarships to Princeton and Oxford, then built his career from helping African farmers access irrigation tools to leading a microbiome therapy company through FDA approval and a Nasdaq IPO before joining Helios Climate Ventures. At Helios, he focuses almost exclusively on the battery and energy storage stack from critical minerals to recycling, spending about a quarter of his time directly supporting founders and describing each investment as a marriage over many years.

About their Fund

Helios Climate Ventures

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Climate, Energy, Materials, Transportation, Deeptech / Hardware
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Helios Climate Ventures is a small, specialized venture capital fund focused exclusively on energy storage technologies like batteries, anodes, and grid storage, operating from Aspen, Colorado with a team of roughly 6 people who combine technical, policy, and financial expertise. The fund backs technically demanding hardware companies that many generalist VCs avoid and consistently co-invests alongside major industrials like Mercedes-Benz, Hyundai, and Chevron, positioning itself as a well-networked specialist that can help connect portfolio companies to large manufacturers for later-stage scaling.

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