Nektar Therapeutics is a biopharmaceutical company. The Company discovers and develops medicines in areas of unmet medical need. Its research and development pipeline of new investigational drugs includes treatments for cancer and autoimmune disease. It has research and development (R&D) pipeline of medicines in oncology, immunology, and virology as well as a portfolio of approved partnered medicines. It leverages its chemistry platform to discover and design new drug candidates. These drug candidates utilize its polymer conjugate technology platforms, which are designed to enable the development of new molecular entities. Its R&D pipeline includes Bempegaldesleukin (NKTR-214), NKTR-358, NKTR-262 and NKTR-255. It develops medicines designed to modulate the activity of key immune cells, such as cytotoxic T cells and Natural Killer (NK) cells, to increase their numbers and improve their function to recognize and attack cancer cells directly or indirectly.