Obinutuzumab (Gazyva™) is an intravenously administered, humanized and glycoengineered, type II anti-CD20 monoclonal antibody for the treatment of B-cell malignancies. It is approved in the US for use in combination with chlorambucil for the first-line treatment of chronic lymphocytic leukaemia (CLL), and has been filed for approval in the EU in this indication. The antibody is based on GlycArt Biotechnology's (later Roche Glycart AG) proprietary GlycoMAb® technology, which uses glycoengineered antibodies that specifically increase antibody-dependent cellular cytotoxicity and thereby increase immune-mediated target cell death. Obinutuzumab is a type II anti-CD20 antibody that induces enhanced direct cell death. The monoclonal antibody is in worldwide phase III development with Roche and its subsidiaries, Genentech and Chugai Pharmaceutical, as well as Biogen Idec, for diffuse large B-cell lymphoma and non-Hodgkin's lymphoma generally, and is also in phase III development in countries outside of the US and EU for CLL.