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 4, 2013

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))

ITEM 8.01       Other Events.

On September 4, 2013, ARIAD Pharmaceuticals, Inc. (the “Company”) issued a press release announcing enrollment of fifty percent of the patients planned in its randomized Phase 3 trial of Iclusig^® (ponatinib) in adult patients with newly diagnosed chronic myeloid leukemia (CML). The trial, formally known as EPIC (Evaluation of Ponatinib versus Imatinib in Chronic Myeloid Leukemia), is designed to provide definitive clinical data to support regulatory approval of ponatinib in treatment-naïve CML patients.

An interim analysis of efficacy -- focused on the primary endpoint of major molecular response rate (MMR) at twelve months -- will be performed in the third quarter of 2014 based on the patients enrolled to date.  Approximately 264 patients have been enrolled in the EPIC trial, and full patient enrollment of approximately 500 patients in the trial is anticipated by the end of 2013.

A copy of the press release is being filed herewith as Exhibit 99.1 and is incorporated by reference herein.

ITEM 9.01 Financial Statements and Exhibits

(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.

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