Calix Limited (ASX: CXL) is an Australia-based environmental technology company that develops and commercializes patented platform technologies for industrial decarbonization, CO2 capture, sustainable mineral processing, water treatment and agriculture. Founded in 2005 and headquartered in Pymble, New South Wales, the company operates through segments including Leilac for CO2 mitigation in cement and lime; Sustainable Processing for renewably powered applications in green iron and steel, zero-emissions alumina, lithium and critical minerals; Advanced Batteries for cathode materials; and Magnesia for magnesium-based products. Its core offerings comprise ACTI-Mag for wastewater phosphate removal, pH stabilization, odor control, biogas management and fats, oils and greases reduction; AQUA-Cal+ for aquaculture farming, lake and pond remediation; BOOSTER-Mag for crop yield enhancement, fertilizer optimization, pest management and fungal control; electric calcination processes; marine coatings; and Leilac technology for pure CO2 capture from industrial emissions. Calix serves industries such as cement and lime, iron and steel, mining, water utilities, agriculture, aquaculture, food and beverage worldwide, with principal operations in Australia, the United States, Southeast Asia and Europe. Recent developments include a $35 million joint development agreement with Rio Tinto in November 2025 for a Zesty green iron demonstration plant, featuring A$3 million upfront and over A$27 million in in-kind contributions; a $44.9 million grant from the Australian Renewable Energy Agency for a Zero Emissions Steel Technology demonstration plant targeting 30,000 tonnes per year of low-carbon iron by mid-2027; an MOU for electric calcination in near-zero emissions alumina; FY25 revenue growth of 11% to $33.9 million from all business lines with 23% operating cost reductions; and issuance of 26.7 million shares at A$0.75 to bolster Leilac, lithium and Zesty projects.