Week of January 30, 2012

Date	Open	High	Low	Close	Volume
Jan 30, 2012	19.01	19.41	18.58	18.76	762,976
Jan 31, 2012	18.77	19.03	18.13	18.38	727,734
Feb 1, 2012	18.50	18.85	18.16	18.69	495,894
Feb 2, 2012	18.69	19.15	18.56	18.82	345,524

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.