Directors

Mitchel Sayare, Ph.D.
Chairman, President, and Chief Executive Officer, ImmunoGen, Inc.

Walter A. Blättler, Ph.D.
Executive Vice President, Science and Technology, ImmunoGen, Inc.

David W. Carter
Former Chairman and Chief Executive Officer,
Xenogen Corporation

Stuart F. Feiner
Former Executive Vice President, General Counsel,
and Secretary,
Inco Limited

Nicole Onetto, M.D.
Senior Vice President, Product Development and Chief Medical Officer, ZymoGenetics, Inc.

Mark Skaletsky
Chairman and Chief Executive Officer,
Trine Pharmaceuticals, Inc.

Joseph J. Villafranca, Ph.D.
Principal and Practice Director, Pharmaceuticals/Life Sciences, Tunnell Consulting

Executive Officers

Mitchel Sayare, Ph.D.
President and Chief Executive Officer

Walter A. Blättler, Ph.D.
Executive Vice President, Science and Technology

Daniel M. Junius
Executive Vice President, Finance and Chief
Financial Officer

John M. Lambert, Ph.D.
Senior Vice President, Pharmaceutical Development

Pauline Jen Ryan
Senior Vice President, Corporate Development
and Operations

 

Corporate Headquarters

ImmunoGen, Inc.
128 Sidney Street
Cambridge, Massachusetts 02139
617 995 2500
www.ImmunoGen.com

Annual Meeting

11:00 AM on November 14, 2006
At the Offices of the Company
128 Sidney Street
Cambridge, Massachusetts 02139

Transfer Agent and Registrar

Mellon Investor Services LLC
Overpeck Center
85 Challenger Road
Ridgefield Park, New Jersey 07660-2108
800 288 9541
www.MellonInvestor.com/isd

Legal Counsel

Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.
Boston, Massachusetts

Auditors

Ernst & Young LLP
Boston, Massachusetts

Shareholder Inquiries

Information about ImmunoGen can be found at www.ImmunoGen.com. Inquiries related to the Company may be directed to the Investor Relations department at our headquarters. Communications related to stock and transfer requirements, including lost stock certificates and change of name or address, should be directed to the Transfer Agent.