Gigablue has raised $20 million in the first close of its Series A financing round, announced during the World Economic Forum Annual Meeting in Davos.
The round was led by Planet Ocean Capital following an extended technical, scientific and environmental due-diligence process. Additional participation came from climate-focused venture capital firms and family offices backing the development of durable carbon removal solutions linked to ocean health.
Founded in 2022, Gigablue is developing a marine carbon dioxide removal pathway based on Microalgae Carbon Fixation and Sinking (MCFS). The methodology was formally released by the Puro.earth Advisory Board in September 2025 after scientific review and public consultation. The approach is designed to replicate the ocean’s natural biological pump, which sequesters carbon over long timeframes.
The company said its deployments are supported by a Measurement, Monitoring, Reporting and Verification (MMRV) framework combining oceanographic data, environmental DNA sampling, water chemistry analysis and deep-sea monitoring tools, with the aim of supporting the future issuance of carbon removal units.
The financing announcement was made during an invitation-only event held within the official Davos security zone, hosted at the Mastercard TechLodge in partnership with Leaders on Purpose, Hub Culture and the Didier Drogba Foundation. The discussion brought together senior figures from finance, sport and climate sectors under the Chatham House Rule.
Gigablue said proceeds from the first close will be used to scale MCFS deployments, expand monitoring and verification capabilities, advance preparations for commercial issuance of carbon removal units, and support progress towards a second close of the Series A round.
The company said it aims to position marine carbon removal as part of the infrastructure needed to address hard-to-abate emissions alongside emissions reductions, as governments and companies pursue net-zero strategies.
