Gigablue, a marine carbon dioxide removal company, announced it has secured a $20 million first close of its Series A financing, announcing the raise during the World Economic Forum Annual Meeting in Davos, Switzerland.
The round was led by Planet Ocean Capital after what Gigablue described as months of technical, scientific, and environmental due diligence. The first close also included participation from mission-aligned venture capital firms and family offices that Gigablue said share the view that durable carbon removal and healthy oceans are becoming foundational infrastructure for the global economy. The company linked that framing to rising energy demand tied to data centers, AI, and digital infrastructure, particularly in sectors where emissions are considered hard to abate.
Founded in 2022, Gigablue said it is developing and deploying a marine carbon removal pathway based on Microalgae Carbon Fixation and Sinking, a methodology that it said was formally released by the Puro.Earth Advisory Board in September 2025, following scientific review and public consultation. Gigablue describes the approach as mirroring the ocean’s natural biological pump, enabling long-term atmospheric carbon removal through marine processes.
Gigablue said its deployments are supported by a Measurement, Monitoring, Reporting, and Verification framework that integrates in situ oceanographic data, environmental DNA sampling, water chemistry analysis, and custom deep-sea monitoring tools. The company said this measurement approach is intended to support transparency and environmental integrity as it works toward issuing high-quality carbon removal units.
The company announced the first close during an invitation-only Davos 2026 dinner held within the official WEF security zone. The dinner, titled “Game On: Investing in Nature, Carbon Removal & the Future of Sport, How Nature, Sport, and Capital Are Shaping the Next Infrastructure of Value,” was hosted at the Mastercard TechLodge in partnership with Leaders on Purpose, Hub Culture, and the Didier Drogba Foundation. Gigablue said the gathering, held under the Chatham House Rule, brought together 30 senior decision-makers across finance, sport, and climate leadership.
Gigablue said proceeds from the first close will be used to scale MCFS deployments, expand measurement and deep-sea monitoring capabilities, advance toward commercial issuance of carbon removal units, and support a second close of the Series A round that it said is currently underway.
