UK: Cleantech firm Carbon8 Systems has been placed into administration, with business advisory firm Quantuma appointed as administrator on 12 November 2025. Carbon8 Systems was founded in 2006 as a University of Greenwich spin-out, focused on research and experimental development within natural sciences and engineering. The company developed Accelerated Carbonation Technology (ACT), a patented process that captures CO₂ emissions and converts them into carbon-negative aggregates sold under the CircaBuild brand. The company also developed CO₂ntainer™, a modular solution which enabled on-site carbon capture and treatment of industrial residues.
Quantuma was instructed by the company’s board to provide advisory support in April 2025, as the company faced cash flow difficulties while seeking investment. Despite efforts to secure funding, this was not successful within the required timeframe. As part of the administration process, Carbon8’s operations at Medway Campus, University of Greenwich, and its premises at Wraxhalls storing plant will close. Eleven employees were made redundant shortly before the appointment on 10 November 2025.
Chris Newell, Quantuma managing director and joint administrator, said “It is always difficult to see a company with such innovative intellectual property (IP) be placed into administration. I expect there to be strong appeal in the assets and any parties interested in the acquisition of the IP are welcome to make contact with us.”
