Exhibit 10.17
SEVERANCE AGREEMENT
This Agreement is entered into as of the 30th day of November, 2006 (the “ Effective Date ”) by and
between ImmunoGen, Inc., a Massachusetts corporation (the “ Company ”) and Walter A. Blattler, Ph.D. (the “
Executive ”).
WHEREAS, the Executive is the Executive Vice President, Science and Technology (“EVP ” ) of the
Company;
WHEREAS, the Company recognizes that the Executive’s service to the Company is very important to
the future success of the Company;
WHEREAS, the Executive desires to enter into this Agreement to provide the Executive with certain
financial protection in the event that his employment terminates under certain conditions following a change in
control of the Company; and
WHEREAS the Board of Directors of the Company (the “ Board ”) has determined that it is in the best
interests of the Company to enter into this Agreement.
NOW, THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the Company and the Executive hereby agree as follows:
1. Definitions .
(a) Cause . For purposes of this Agreement, “ Cause ” shall mean that Executive has (i)
intentionally committed an act or omission that materially harms the Company; (ii) been grossly negligent in the
performance of Executive’s duties to the Company; (iii) willfully failed or refused to follow the lawful and proper
directives of the Board or the CEO; (iv) been convicted of, or pleaded guilty or nolo contendre , to a felony; (v)
committed an act involving moral turpitude; (vi) committed an act relating to the Executive’s employment or the
Company involving, in the good faith judgment of the Board, material fraud or theft; (vii) breached any material
provision of this Agreement or any nondisclosure or non-competition agreement between Executive and the
Company, as all of the foregoing may be amended prospectively from time to time; or (viii) breached a material
provision of any code of conduct or ethics p