|Nov 20, 2017||89.91||90.96||89.24||90.84||393,272|
|Nov 21, 2017||91.22||91.92||90.60||91.10||430,429|
|Nov 22, 2017||90.89||92.40||90.11||91.45||363,114|
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 Proofpoint, Inc. does not maintain or provide information directly to this service. Prices display split-adjusted cost basis per share on that date.