SAN CARLOS, Calif.--(BUSINESS WIRE)--Feb. 7, 2006--Nektar Therapeutics (Nasdaq:NKTR) announced today that Ajit S. Gill will be retiring as CEO, President, and Director as of March 17, 2006. Robert Chess, Nektar’s current Executive Chairman and former CEO, will serve as acting CEO on an interim basis after March 17 until a new CEO is found. Mr. Gill will serve as an advisor to the company after his retirement.