Form SC 13G SINA CORP Filed by: PLATINUM INVESTMENT MANAGEMENT LTD

Item 1.

(a) 	Sina Corporation

(b)     20F Beijing Ideal International Plaza 
	No.58 Northwest 4th Ring Road 
	Haidian District, Beijing 100080
	PRC



Item 2.

(a) Platinum Investment Management Limited

(b) Level 8, 7 Macquarie Place
    Sydney NSW 2000
    Australia
(c) Australia
(d) Common Stock
(e) G81477104

Item 3.
(e) An IA in accordance with Section 240.13d-1(b)(1)(ii)(e)

Item 4.

(a) 4,437,093
(b) 7.4%
(c) (i) 3,922,462
(ii) 0
(iii) 4,437,093
(iv) 0

Item 5
No

Item 6
The clients of Platinum Investment Management Ltd including pooled 
investment vehicles and other managed accounts have the right to 
receive or power to direct the receipt of dividends from, and the 
proceeds from the sale of, Sina Corporation.

Item 7
N/A

Item 8
N/A

Item 9
N/A



Item 10
(a) By signing below I certify that, to the best of my knowledge and 
belief, the securities referred to above were acquired and are held 
in the ordinary course of business and 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.
(b) N/A


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.

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