NantKwest Added to Nasdaq Biotechnology Index

CULVER CITY, Calif.--()--NantKwest, Inc. (Nasdaq: NK), a clinical-stage immunotherapy company focused on harnessing the power of the innate immune system by using natural killer cells to treat cancer, infectious diseases and inflammatory diseases, today announced that it has been added to the NASDAQ Biotechnology Index® (NBI) as part of NBI’s annual selection of biotechnology and pharmaceutical companies listed on the NASDAQ Stock Market® that meet NBI’s eligibility criteria. NantKwest will be added to the NBI effective prior to market open on December 18, 2015.

The NASDAQ Biotechnology Index is a modified market capitalization weighted index that is designed to track the performance of a set of securities listed on The NASDAQ Stock Market® (NASDAQ®) that are classified as either biotechnology or pharmaceutical according to the Industry Classification Benchmark and is re-ranked annually in December.

About NantKwest Inc.

NantKwest (Nasdaq:NK) is a pioneering, next generation, clinical-stage immunotherapy company focused on harnessing the unique power of our immune system using natural killer (NK) cells to treat cancer, infectious diseases and inflammatory diseases. NK cells are the body’s first line of defense due to the innate ability of NK cells to rapidly identify and destroy cells under stress, such as cancer or virally-infected cells.

NantKwest’s unique NK cell-based platform, with the capacity to grow active killer cells as a biological cancer therapy, has been designed to induce cell death against cancer or infected cells by three different modes of action: (1) Direct killing using activated NK cells (aNK) that release toxic granules directly into the cell through cell to cell contact, (2) Antibody-mediated killing using haNKs, which are NK cells engineered to incorporate a high affinity receptor that binds to an administered antibody, enhancing the cancer cell killing effect of that antibody, and (3) Targeted activated killing using taNKs, which are NK cells engineered to incorporate chimeric antigen receptors (CARs) to target tumor-specific antigens found on the surface of cancer cells.

Our aNK, haNK and taNK platform addresses certain limitations of T cell therapies including the reduction of risk of serious "cytokine storms" reported after T cell therapy. As an “off-the-shelf” therapy, NantKwest's NK cells do not rely on a patient’s own often compromised immune system. In Phase 1 clinical trials in patients with late stage cancer, NantKwest's NK cells have been successfully administered as an outpatient infusion therapy without any reported severe side effects, even at doses of 10 billion cells.

By leveraging an integrated and extensive genomics and transcriptomics discovery and development engine, together with a pipeline of multiple, clinical-stage, immuno-oncology programs that include a Phase 2 trial for a rare form of melanoma and the planned initiation of a clinical trial of NK cells targeted to breast cancer, we believe NantKwest is uniquely positioned to be the premier immunotherapy company and transform medicine by delivering living drugs in a bag and bringing novel NK cell-based therapies to routine clinical care. For more information please visit ýhttp://www.nantkwest.com and follow Dr. Soon-Shiong on Twitter@solvehealthcare.

Contacts

NantKwest
Jen Hodson, 562-397-3639
jhodson@nantworks.com

Contacts

NantKwest
Jen Hodson, 562-397-3639
jhodson@nantworks.com