EXHIBIT 32
Certification
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)
Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of ImmunoGen, Inc., a Massachusetts corporation (the “Company”), does hereby certify, to such officer’s knowledge, that:
The Amendment No. 1 to the Quarterly Report for the period ended March 31, 2005 (as amended the “Form 10-Q”) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.
Dated: July 27, 2005 | /s/ Mitchel Sayare |
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| Mitchel Sayare | |
| Chairman of the Board of Directors, Chief Executive | |
| Officer and President | |
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Dated: July 27, 2005 | /s/ Daniel M. Junius |
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| Daniel M. Junius | |
| Senior Vice President and Chief Financial Officer | |
| (principal financial officer) | |
