Week of May 14, 2012

Date	Open	High	Low	Close	Volume
May 14, 2012	27.60	27.69	26.82	26.94	487,362
May 15, 2012	27.47	27.78	27.06	27.34	386,933
May 16, 2012	27.39	29.35	27.39	29.31	1,161,393

Year End Stock Prices

The historical stock information provided is for informational purposes only and is not intended for trading purposes. The historical stock information is provided by Mergent, a third party service, and Pharmacyclics, Inc. does not maintain or provide information directly to this service. Prices display split-adjusted cost basis per share on that date.