FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

DENNER ALEXANDER J 		2. Issuer Name and Ticker or Trading Symbol

ARIAD PHARMACEUTICALS INC [ ARIA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle)

C/O SARISSA CAPITAL MANAGEMENT LP, 660 STEAMBOAT ROAD 		3. Date of Earliest Transaction (MM/DD/YYYY)

8/15/2014
(Street)

GREENWICH, CT 06830
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   8/15/2014     P (1)    615466   A $5.83   7798665   I   Sarissa Capital Domestic Fund LP   (2)
Common Stock   8/15/2014     P (1)    234534   A $5.83   5051335   I   Sarissa Capital Offshore Master Fund LP   (2)

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
3.625% Convertible Notes due 2019   $9.3015   8/18/2014     P      5340720       12/15/2018   (3) 6/15/2019   Common Stock   574127.4   $5026953.00   5340720   I   Sarissa Capital Domestic Fund LP   (2)
3.625% Convertible Notes due 2019   $9.3015   8/18/2014     P      3459280       12/15/2018   (3) 6/15/2019   Common Stock   371872.6   $3256047.00   3459280   I   Sarissa Capital Offshore Master Fund LP   (2)

Explanation of Responses:
( 1)  These purchases were made in accordance with the Nomination and Standstill Agreement dated 2/20/2014 between the reporting person, Sarissa Capital Management and affiliated entities, and ARIAD Pharmaceuticals, Inc.
( 2)  The reporting person is the Chief Investment Officer of Sarissa Capital Management LP, investment manager of this fund. As such, the reporting person may be deemed to beneficially own the the securities owned by this fund. The reporting person disclaims any beneficial ownership of these securities, except to the extent of his pecuniary interest therein.
( 3)  In addition, the notes are convertible at the option of the holders at any time prior to the close of business on the business day immediately preceding December 15, 2018 under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending on December 31, 2014 (and only during such calendar quarter), if the last reported sale price of the Company's common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the applicable conversion price on each applicable trading day; (ii) during the five business day period after any five consecutive trading day period (the "measurement period") in which the "trading price" (as defined in the indenture governing the notes) per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of the Company's common stock and the applicable conversion rate on each such trading day; or (iii) upon the occurrence of certain corporate events as specified in the indenture governing the notes.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
DENNER ALEXANDER J
C/O SARISSA CAPITAL MANAGEMENT LP
660 STEAMBOAT ROAD
GREENWICH, CT 06830 		X



Signatures
/s/ Alexander J. Denner, Ph.D. 8/19/2014
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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