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): December 14, 2009

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

Delaware

0-21696

22-3106987

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

26 Landsdowne Street, Cambridge, Massachusetts	02139
(Address of principal executive offices)	(Zip Code)

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 December 14, 2009 ARIAD Pharmaceuticals, Inc. (“ARIAD”) issued a press release announcing the presentation of updated clinical data from its Phase 2 study evaluating oral ridaforolimus in combination with trastuzumab (Herceptin^®) in patients with resistant, metastatic breast cancer. As assessed by the study investigators, the clinical trial met its primary endpoint of objective response rate. The data were presented last Friday, December 11, 2009, at the annual San Antonio Breast Cancer Symposium in San Antonio, Texas. ARIAD is developing ridaforolimus, an investigational mTOR inhibitor, in collaboration with its partner, Merck & Co, Inc.

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

ITEM 9.01

Financial Statements and Exhibits

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.

		ARIAD Pharmaceuticals, Inc.


Date:	December 15, 2009	By:	/s/ Edward M. Fitzgerald
			Edward M. Fitzgerald
			Senior Vice President, Chief Financial Officer

Exhibit Number	Description

99.1	Press Release dated December 14, 2009.