UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 24, 2011

ARIAD Pharmaceuticals, Inc.
(Exact name of registrant as specified in its charter)

Registrant's telephone number, including area code: (617) 494-0400

Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

⃞ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

⃞ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

⃞ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

⃞ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

On September 26, 2011 ARIAD Pharmaceuticals, Inc. (“Company”) issued a press release announcing long-term results of the Phase 1 study of its investigational pan-BCR-ABL inhibitor, ponatinib, in heavily pretreated patients with resistant and refractory chronic myeloid leukemia (CML) and Philadelphia-positive acute lymphoblastic leukemia (Ph+ ALL).  With the trial fully enrolled and all patients evaluable, 72% of chronic-phase CML patients treated with ponatinib achieved a major cytogenetic response (MCyR), including 92% of patients who also had a T315I mutation.  Since the last data update from the trial was presented in December, 2010, all chronic-phase CML patients who achieved a MCyR remain in response with no signs of resistance.  These data were presented at the international Chronic Myeloid Leukemia foundation (iCMLf) conference sponsored by the European Society of Hematology (ESH) at its 13th Annual Meeting held in Estoril, Portugal on Saturday, September 24, 2011.

A copy of the press release is being filed herewith as Exhibit 99.1 and the information contained therein is incorporated by reference into this Current Report on Form 8-K.

(d)   The following exhibit is filed with this report:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit Index

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