Geron Corporation operates as a biopharmaceutical company and intends to use human embryonic stem cell technology to enable the development of transplantation therapies by providing starting material for the manufacture of cells and tissues.

Aastrom Biosciences, Inc., a development stage company, focuses on the development of autologous cell products for use in regenerative medicine.

StemCells, Inc., a biopharmaceutical company, engages in the discovery and development of adult stem cell therapeutics to treat damage to; or degeneration of major organ systems, such as the central nervous system, liver, and pancreas.

ViaCell, Inc., a biotechnology company, engages in the research, development, and commercialization of cellular therapies in the United States and Singapore. It develops a pipeline of proprietary umbilical cord blood-derived and adult-derived stem cell product candidates as treatments for cancer, cardiac disease, and diabetes.

Advanced Cell Technology, Inc., a biotechnology company, engages in the development and commercialization of human stem cell technology in the fields of regenerative medicine and stem cell therapy in the United States.

Invitrogen Corporation provides products and services that support academic and government research institutions, as well as pharmaceutical and biotechnology companies. The company operates in two segments, BioDiscovery and BioProduction. BioDiscovery segment offers functional genomics, cell biology, and drug discovery product lines. Functional genomics product line includes the research tools used in reagent and kit form for gene acquisition, gene cloning, gene expression, and gene analysis techniques.

Alexion Pharmaceuticals, Inc., a biotechnology company, together with its subsidiaries, engages in the discovery and development of biologic therapeutic products for the treatment of severe diseases in the United States.

LifeCell Corporation engages in the development and marketing of human-derived tissue-based products for use in reconstructive, orthopedic, and urogynecologic surgical procedures to repair soft tissue defects.