|May 22, 2017||5.31||5.34||5.07||5.16||1,990,832|
|May 23, 2017||5.15||5.16||4.91||4.98||1,384,890|
|May 24, 2017||5.19||5.30||5.05||5.09||2,290,450|
|May 25, 2017||5.11||5.14||4.92||5.07||3,095,254|
|May 26, 2017||5.05||5.06||4.56||4.72||2,413,289|
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 ImmunoGen, Inc. does not maintain or provide information directly to this service. Prices display split-adjusted cost basis per share on that date.