Gigablue, a marine carbon dioxide removal (mCDR) company developing science-based solutions to restore ocean health while addressing climate change at scale, today announced the close of its £15 million Series A led by Planet Ocean Capital. The announcement was unveiled during the World Economic Forum Annual Meeting in Davos.
Founded in 2022, Gigablue develops and deploys a marine carbon removal pathway based on Microalgae Carbon Fixation and Sinking, a methodology formally released by the Puro.earth Advisory Board in September 2025 following comprehensive scientific review and public consultation. The approach mirrors the ocean’s natural biological pump to enable long-term atmospheric carbon removal through natural marine processes, with deployments supported by a Measurement, Monitoring, Reporting, and Verification framework integrating in-situ oceanographic data, environmental DNA sampling, water chemistry analysis, and deep-sea monitoring tools.
Proceeds from the Series A will support continued scaling of Gigablue’s Microalgae Carbon Fixation and Sinking deployments, expansion of monitoring and verification capabilities, advancement toward commercial issuance of carbon removal units, and progress toward the second close of the Series A round, which is currently underway.
