Company:  IMMUNOGEN INC (IMGN)
Form Type:  10-K
Filing Date:  8/29/2013 
CIK:  0000855654 
Address:  830 WINTER ST 
City, State, Zip:  WALTHAM, Massachusetts 02451 
Telephone:  (781)895-0600 
Fiscal Year:  06/30 
Last Trade
Last Trade: 
$12.80  
Change: 
0.02 (0.16%)  
Trade Time: 
Apr 15  
Market Cap: 
$1.10B
Description of Business
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  FORM 10-K
    Item 1A. Risk Factors
      FACTORS THAT AFFECT OUR COMPANY.
    Item 1B. Unresolved Staff Comments
    PART I
      Item 2. Properties
      Item 3. Legal Proceedings
      Item 4. Mine Safety Disclosures
    PART II
      Item 5. Market for Registrant's Common Equity, Related ...
      Item 6. Selected Financial Data
      Item 7. Management's Discussion and Analysis of Financial ...
        Results of Operations
        Liquidity and Capital Resources
      Item 7A. Quantitative and Qualitative Disclosure About ...
      Item 8. Financial Statements and Supplementary Data
        Report of Independent Registered Public Accounting Firm
        BALANCE SHEET
        INCOME STATEMENT
        STOCKHOLDERS EQUITY
        CASH FLOW
        NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
      Item 9. Changes in and Disagreements with Accountants on ...
      Item 9A. Controls and Procedures
      Report of Independent Registered Public Accounting Firm
      Item 9B. Other Information
    PART III
    PART IV
      Item 15. Exhibits, Financial Statement Schedules
    SIGNATURES
    EXHIBIT INDEX
    VALUATION AND QUALIFYING ACCOUNTS
  EXHIBIT 23
    Consent of Independent Registered Public Accounting Firm
  EXHIBIT 31.1
    CERTIFICATIONS UNDER SECTION 302
  EXHIBIT 31.2
    CERTIFICATIONS UNDER SECTION 302
  EXHIBIT 32
    CERTIFICATIONS UNDER SECTION 906
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