ImmunoGen, Inc. Announces Conference Call to Discuss its First Quarter Fiscal Year 2016 Financial Results

ImmunoGen, Inc. (Nasdaq: IMGN), a biotechnology company that develops novel anticancer therapeutics using its antibody-drug conjugate (ADC) technology, today announced that the Company will host a conference call at 8:00 a.m. ET on Tuesday, October 27, 2015, to discuss ImmunoGen's financial results for the three-month period ended September 30, 2015. Management also will provide an update on the Company.

To access the live call by phone, dial 913-905-3226; the conference ID is 9613638. The call also may be accessed through the Investors section of the Company's website, www.immunogen.com. Following the live webcast, a replay of the call will be available at the same location through November 10, 2015.

About ImmunoGen, Inc.

ImmunoGen, Inc. develops targeted anticancer therapeutics. The Company’s ADC technology uses tumor-targeting antibodies to deliver an ImmunoGen cell-killing agent specifically to cancer cells. The Company utilizes its ADC technology with its antibodies to create ImmunoGen product candidates and also out-licenses limited rights to use its technology to other companies. Roche’s Kadcyla® is the first marketed product with ImmunoGen’s ADC technology. More information about the Company can be found at www.immunogen.com.

Kadcyla® is a registered trademark of Genentech, a member of the Roche Group.

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For Investors & Media:ImmunoGen, Inc.Carol Hausner, [e-mail]