300ppm

300ppm

300ppm was founded in Berlin as an investment vehicle built around a single conviction: reversing atmospheric carbon accumulation requires commercial-scale technology, not incremental policy. The firm takes its name from the CO₂ concentration threshold many scientists consider the upper bound of climate stability, signaling a mandate focused on measurable gigaton-scale removal rather than carbon accounting exercises. Its origin ties to a small group of operators and investors who viewed climate capital as a deployment problem rather than an awareness problem. Strategy centers on direct pre-seed and seed-stage equity investments in startups developing engineered carbon removal, carbon utilization, and industrial decarbonization technologies. The firm has backed companies working on direct air capture, biochar production, enhanced weathering, and carbon-negative manufacturing processes. Known portfolio positions include German DAC developer Greenlyte Carbon Technologies and biochar platform Novocarbo. 300ppm also participates alongside climate-focused syndicates and European deeptech funds, often as the first institutional check. Geographic focus spans the DACH region, the Nordics, and select North American opportunities where regulation or industrial infrastructure creates early-adopter markets. The firm operates with a lean, Berlin-based team that combines venture investing backgrounds with technical climate science expertise. 300ppm does not disclose total assets under management or deployment figures publicly. It has co-invested alongside funds including Planet A Ventures and Carbon Removal Partners on certain rounds. The firm's operating model includes active portfolio support — connecting startups with offtake agreements, pilot partners, and regulatory pathways — reflecting a venture-builder posture more than a passive LP approach. Structurally, 300ppm functions as a thesis-bound investment company rather than a blind-pool fund, which allows it to concentrate conviction into a narrow set of engineered carbon removal approaches that most generalist climate funds treat as a peripheral allocation. This single-mandate architecture mirrors the focused capital models of firms like Breakthrough Energy Ventures but operates at an earlier stage and without a single-family-office balance sheet behind it. The governance and succession structure remain unreported in public records, consistent with the firm's early-stage and privately held profile.