Form Type:  SC 13G
Filing Date:  4/27/2012 
CIK:  0000884731 
Address:  125 BINNEY STREET 
City, State, Zip:  CAMBRIDGE, Massachusetts 02142 
Telephone:  (617) 494-0400 
Fiscal Year:  12/31 
Description of Business
The following Business Section contains forward-looking statements. Our actual results could differ materially from those anticipated in these forward-looking statements as a result of certain risks, uncertainties and other factors including the risk factors set forth in Part I, Item 1A of this annual report. Unless the content requires otherwise, references to "ARIAD," "company," "we," "our," and "us," in this annual report refer to ARIAD Pharmaceuticals, Inc. and our subsidiaries. Overview ARIAD is a global oncology company focused on transforming the lives of cancer patients with breakthrough medicines. Our mission is to discover, develop and commercialize small-molecule drugs to treat cancer in patients with the greatest unmet medical need - aggressive cancers where current therapies are inadequate.
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  EXHIBIT 99.1