Firm Analyst Phone E-Mail Biotech Stock Research David Miller 206-528-8110 david.miller@biotechstockresearch.com Brean Murray, Carret & Co. Ling Wang, CFA 212-702-6680 ling.wang@bmur.com Cantor Fitzgerald Pamela Bassett, DMD 212-829-4769 pbassett@cantor.com Lazard Capital Markets Joel Sendek 212-632-1926 joel.sendek@lazardcap.com Morgan Joseph and Co. Shiv Kapoor 415-287-4190 skapoor@morganjoseph.com Oppenheimer Co. Inc. Bret Holley, Ph.D. 212-667-7289 bret.holley@opco.com RBC Capital Markets Jason Kantor, Ph.D. 415-633-8565 jason.kantor@rbccm.com

ImmunoGen is followed by the analysts listed above. Please note that any opinions, estimates or forecasts regarding ImmunoGen's performance made by these analysts are theirs alone and do not represent opinions, forecasts or predictions of ImmunoGen or its management. ImmunoGen does not by its reference above or distribution imply its endorsement of or concurrence with such information, conclusions or recommendations.