Holcim invests in carbon-storage developer 44.01

Holcim has invested in carbon-mineralisation technology developer 44.01, extending an existing collaboration between the companies. The value and ownership terms of the investment have not been disclosed.

44.01 injects captured CO₂ into naturally reactive ultramafic rock formations, where it reacts to form stable carbonate minerals. Holcim said its investment would support the technology company’s international expansion and commercial scale-up.

The partners have operated a pilot linked to Holcim’s Emirates Cement Plant in Fujairah, UAE, since July 2026. Designed to capture 4–4.5t of CO₂ per day from the plant’s flue gas, the installation transports the captured carbon to a nearby site for underground injection and mineralisation.

Holcim sees the technology as a potential storage route for inland cement plants lacking access to offshore storage networks, subject to suitable local geology. The transaction is Holcim MAQER Ventures’ 22nd investment.