CytomX Therapeutics, Inc. is a United States-based biotechnology company. The Company is engaged in developing Probody therapeutics for the treatment of cancer. Its Probody Platform designs drugs, which activate in the tumor microenvironment while remaining inert in tissue and in circulation. It is also engaged in discovering and developing immunotherapy and antibody drug conjugate therapies to treat areas of medical need in oncology. The Company also focuses on applying its technology to bispecific T-cell engaging antibodies and engineered cell therapies. The Company's pipeline focuses in two areas in research and development: Precision cancer immunotherapy and Probody drug conjugates (PDCs). The Company's additional pipeline programs include Probody applications in the field of bispecific antibodies and engineered cell therapies.