#$%^&*AU2018203579A120180614.pdf#####C: Interwovn NRPortbl DCC AAR 17028598_l.docx-22 05/2018 ABSTRACT Highly effective combinations of a compound of formula A (a PI3KS selective inhibitor) and anti-CD20 antibodies are provided herein for the treatment and amelioration of P13K6 and/or CD20 mediated diseases and disorders. In particular, the combination can be used to treat cancers and autoimmune diseases. More particularly, the invention provided for a combination of a compound of formula A, or stereoisomers thereof, and ublituximab for the treatment and/or amelioration of haematological malignancies such as leukemia and lymphoma.