AmerStem

AmerStem is a private green biotechnology company based in Camarillo, California that develops sustainable plant-culture and vertical-farming technologies to produce high-value plant-derived bioactives. Its primary commercial focus is large-scale production of Quillaja-derived saponin immunoadjuvants, including QS-21, used in vaccine adjuvants. The company positions its platform as an environmentally sustainable alternative to harvesting Quillaja saponaria trees, and also describes applications in agriculture, disinfectants, personal care, and recombinant therapeutic proteins. AmerStem appears to operate more as a specialty biotech platform and ingredient supplier than as a traditional drug developer with a clinical pipeline. Its technology platform is also described as adaptable for plant-based expression of antigens and therapeutic proteins, including monoclonal antibodies.