-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 JE3G880cAbFIRsH+i++k4+yuV2Jw4MCrsXvEvcpZM/4be8u9gLEkU5WpIPUXTh5Y
 JKLn3r+GlwzWLNOTsYmwLw==

<SEC-DOCUMENT>0001256071-06-000007.txt : 20060214
<SEC-HEADER>0001256071-06-000007.hdr.sgml : 20060214
<ACCEPTANCE-DATETIME>20060214171130
ACCESSION NUMBER:		0001256071-06-000007
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20060214
DATE AS OF CHANGE:		20060214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARIAD PHARMACEUTICALS INC
		CENTRAL INDEX KEY:			0000884731
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				223106987
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-48751
		FILM NUMBER:		06617001

	BUSINESS ADDRESS:	
		STREET 1:		26 LANDSDOWNE ST
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		6174940400

	MAIL ADDRESS:	
		STREET 1:		26 LANDSDOWNE
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PLATINUM ASSET MANAGEMENT LTD
		CENTRAL INDEX KEY:			0001256071
		IRS NUMBER:				000000000

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		C/O PLATINUM ASSET MANAGEMENT
		STREET 2:		LEVEL 4, 55 HARRINGTON ST
		CITY:			SYDNEY AUSTRALIA 2000
		STATE:			C3
		ZIP:			00000
		BUSINESS PHONE:		01161292557525

	MAIL ADDRESS:	
		STREET 1:		C/O PLATINUM ASSET MANAGEMENT
		STREET 2:		LEVEL 4, 55 HARRINGTON ST
		CITY:			SYDNEY AUSTRALIA 2000
		STATE:			C3
		ZIP:			00000
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>ariad21.txt
<TEXT>
Item 1.

(a) Ariad Pharmaceuticals Inc

(b) 	26 Landsdowne St
      Cambridge, Massachusetts, 02139-4234

Item 2.

(a) Platinum Asset Management Limited

(b)  Level 4, 55 Harrington St
Sydney NSW 2000
Australia
(c) Australia
(d) Common Stock
(e) 04033A100

Item 3.
N/A

Item 4.

(a) 2,802,839
(b) 4.6%
(c) (i) 2,802,839
(ii) 0
(iii) 2,802,839
(iv) 0

Item 5
Yes

Item 6
No

Item 7
N/A

Item 8
N/a

Item 9
N/A



Item 10
(a) N/A
(b) By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not
held for the purpose of or with the effect of changing or influencing
the control of the issuer of the securities and were not acquired and
are not held in connection with or as a participant in any transaction
having that purpose or effect.



After reasonable inquiry and to the best of my
Knowledge and belief, I certify that the information
set forth in this statement is true, complete and correct.




</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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