8-K - Immunogen, Inc.

8-KEnd of Material Contract, Completing Asset Acquisition or Sale, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Material Modifications to Rights of Security Holders, Change in Company Ownership, Changes in Board, Management or Compensation, Amendments to Articles of Incorporation or Bylaws

EX-3.1EXHIBIT 3.1

EX-3.2EXHIBIT 3.2