Celldex Therapeutics Inc was incorporated in Delaware. The Company is a biopharmaceutical company focused on the development and commercialization of several immunotherapy technologies for the treatment of cancer and other difficult-to-treat diseases. Its drug candidate, rindopepimut (CDX-110), is an immunotherapeutic vaccine that targets the tumor-specific molecule, epidermal growth factor receptor variant III (EGFRvIII). EGFRvIII is a mutated form of the epidermal growth factor receptor (EGFR) that is only expressed in cancer cells and not in normal tissue and can directly contribute to cancer cell growth. Its other drug candidates include CDX-011 and CDX-1127. CDX-011 is an antibody-drug conjugate (ADC) that consists of a fully-human monoclonal antibody, CR011, linked to a potent cell-killing drug, monomethyl-auristatin E (MMAE). The CR011 antibody specifically targets glycoprotein NMB (GPNMB) that is expressed in a variety of human cancers including breast cancer. In December 2011, it completed enrollment of EMERGE, a randomized Phase 2b study of CDX-011 in patients with heavily pre-treated, advanced, GPNMB-positive breast cancer. It has additional clinical and preclinical programs, including CDX-1401, an APC Targeting Technology program, CDX-301, an immune cell mobilizing agent and dendritic cell growth factor and CDX-1135, a molecule that inhibits a part of the immune system called the complement system. The Company's products are derived from a broad set of complementary technologies which have the ability to utilize the human immune system and enable the creation of therapeutic agents. It is using these technologies to develop targeted immunotherapeutics comprised of antibodies, adjuvants and monotherapies and antibody-drug conjugates that prevent or treat cancer and other diseases that modify undesirable activity by the body's own proteins or cells. A number of its immunotherapeutic and antibody-drug conjugate drug candidates are in various stages of clinical trials. The Company faces competition from pharmaceutical and biotechnology companies both in the United States and abroad which include Arbor Pharmaceutics, Inc., AstraZeneca PLC, Bayer, Celgene Corporation, Eisai Inc., Eli Lilly and Company, Medigene AG, Northwest Biotherapeutics, Inc., Pfizer Inc., and Roche. In the United States, vaccines and immunotherapeutics for human use are subject to The Food and Drug Administration (FDA) approval as 'biologics' under the Public Health Service Act and 'drugs' under the Federal Food, Drug and Cosmetic Act.