Nektar Therapeutics, a biopharmaceutical company, focuses on discovering and developing medicines in areas of unmet medical need in the United States and internationally.

The company's products include Bempegaldesleukin, a CD122-preferential interleukin-2 (IL-2) pathway agonist, which is in phase 3 clinical trial to treat metastatic melanoma, renal cell carcinoma, muscle-invasive bladder cancer, squamous cell carcinoma of the head and neck, and adjuvant melanoma; phase 2 clinical trial for the treatment of renal cell carcinoma, non-small cell lung cancer, and urothelial cancer; phase 1/2A clinical trial to treat squamous cell carcinoma of the head and neck; phase 1/2 clinical trial for the treatment of solid tumors; and phase 1B clinical trial to treat COVID-19.

It is also developing NKTR-358, a cytokine Treg stimulant that is in phase 2 clinical trial for the treatment of systemic lupus erythematosus and ulcerative colitis, as well as phase 1B clinical trial to treat atopic dermatitis and psoriasis; NKTR-255, an IL-15 receptor agonist, which is in phase 1/2 clinical trial for the treatment of non-Hodgkin's lymphoma and multiple myeloma, and head and neck cancer and colorectal cancer; and NKTR-262, a toll-like receptor agonist that is in phase 1/2 clinical trial to treat solid tumors, as well as various other drug candidates.

The company has collaboration agreements with Takeda Pharmaceutical Company Ltd.; AstraZeneca AB; UCB Pharma S.A.; F.

Hoffmann-La Roche Ltd; Bausch Health Companies Inc.; Pfizer Inc.; Amgen Inc.; UCB Pharma (Biogen); Bristol-Myers Squibb Company; Baxalta Incorporated; Eli Lilly and Company; Merck KGaA; and SFJ Pharmaceuticals, Inc.

Nektar Therapeutics was incorporated in 1990 and is headquartered in San Francisco, California.