NeoStem, Inc. operates in cellular therapy industry. Cellular therapy addresses the process by which new cells are introduced into a tissue to prevent or treat disease, or regenerate damaged or aged tissue, and consists of a separate therapeutic technology platform in addition to pharmaceuticals, biologics and medical devices. The Company�s business model includes the development of novel cell therapy products, as well as operating a contract development and manufacturing organization (CDMO) providing services to others in the regenerative medicine industry. Progenitor Cell Therapy, LLC, the Company�s wholly owned subsidiary (PCT), is a CDMO in the cellular therapy industry. PCT has provided pre-clinical and clinical current Good Manufacturing Practice (cGMP) development and manufacturing services to over 100 clients advancing regenerative medicine product candidates. In May 2014, the Company acquired California Stem Cell, Inc.