Capital Stock

3 Months Ended

Mar. 31, 2020

Capital Stock

Capital Stock

F. Capital Stock

Compensation Policy for Non-Employee Directors

Pursuant to the Compensation Policy for Non-Employee Directors, Non-Employee Directors are granted deferred share units for their annual retainers which vest quarterly over approximately one year from the date of grant, contingent upon the individual remaining a director of ImmunoGen as of each vesting date. The number of deferred share units awarded is fixed per the plan on the date of the award. All unvested deferred share units will automatically vest immediately prior to the occurrence of a change of control. The redemption amount of deferred share units issued will be paid in shares of common stock of the Company on the date a director ceases to be a member of the Board.

In addition to the deferred share units, the Non-Employee Directors are also entitled to receive a fixed number of stock options on the date of the annual meeting of shareholders. These options vest quarterly over approximately one year from the date of grant. Any new directors will receive a pro-rated award, depending on their date of election to the Board. The directors received a total of 108,000 and 128,000 options in June 2019 and 2018, respectively, and the related compensation expense for the three months ended March 31, 2020 and 2019 is included in the amounts discussed in the “Stock-Based Compensation” section of Note B above.