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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
 Washington, D.C. 20549
 FORM 20-F/A
(Amendment No. 1)
 o
    
    REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF
1934
 OR
 þ
    
    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
 For the fiscal year ended December 31, 2009
 OR
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    TRANSITION REPORT PURSUANT TO SECTION
13 OR 15(d) OF THE SECURITIES EXCHANGE
ACT OF 1934
 For the transition period from  to
 OR
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    SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
 Date of event requiring this shell company report
 Commission file number 000-30698
 SINA CORPORATION
 (Exact name of Registrant as specified in its charter)
 Cayman Islands  (Jurisdiction of incorporation or organization)
 37F, Jin Mao Tower
88 Century Boulevard, Pudong
Shanghai 200121, China  (Address of principal executive offices)
 Contact Person: Chief Financial Officer
Phone: +8610 8262 8888
Facsimile: +8610 8260 7166
Address: 20/F Beijing Ideal International Plaza
No. 58 Northwest 4th Ring Road
Haidian District, Beijing, 100080, Peoples Republic of China  (name, telephone, e-mail and/or facsimile number and address of company contact person)
 Securities registered or to be registered pursuant to Section 12(b) of the Act.
 Title of each class
    
    Name of each exchange on which registeredOrdinary Shares, $0.133 par value
    
    The NASDAQ Stock Market LLC (NASDAQOrdinary Shares Purchase Rights
    
    Global Select Market)
 Securities registered or to be registered pursuant to Section 12(g) of the Act.
 Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act.
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  Large accelerated filer þ   
    Accelerated filer o
    Non-accelerated filer o
  U.S. GAAP þ
    
    International Financial Reporting Standards as issued
    
    Other oby the International Accounting Standards Board o
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TABLE OF CONTENTS  PART IIIItem 18. Financial StatementsItem 19. ExhibitsSIGNATURESEX-12.1EX-12.2EX-13.1EX-13.2EX-15.3EX-15.4    Table of Contents  EXPLANATORY NOTE
   
 PART III
 
 Item 18. Financial Statements
   
 Item 19. Exhibits
 http://www.sec.gov.
 ExhibitNumber
    
    Description1.1
    
    Amended and Restated Articles of Association of SINA Corporation (Filed as Exhibit 3.1 to
the Companys Annual Report on Form 10-K filed on March 16, 2005, and incorporated herein by
reference).1.2
    
    Amended and Restated Memorandum of Association of SINA.com (currently known as SINA
Corporation) (Filed as Exhibit 3.1 to the Companys Annual Report on Form 10-K filed on
March 16,
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ExhibitNumber
    
    Description2005, and incorporated herein by reference).2.1
    
    Form of Subordinated Note due July 15, 2023 (Filed as Exhibit 4.1 to the Companys Report on
Form 10-Q for the three month period ended June 30, 2003, and incorporated herein by
reference).2.2
    
    Indenture, dated as of July 7, 2003, by and between the Company and the Bank of New York
(Filed as Exhibit 4.2 to the Companys Report on Form 10-Q for the three month period ended
June 30, 2003, and incorporated herein by reference).2.3
    
    Registration Rights Agreement, dated as of July 7, 2003, by and between the Company and
Credit Suisse First Boston LLC (Filed as Exhibit 4.3 to the Companys Report on Form 10-Q
for the three month period ended June 30, 2003, and incorporated herein by reference).2.4
    
    Rights Agreement dated as of February 22, 2005 between SINA Corporation and American Stock
Transfer & Trust Company, as Rights Agent (Filed as Exhibit 4.1 to the Companys Report on
Form 8-K filed on February 24, 2005, and incorporated herein by reference).2.5
    
    Amendment No. 1 to Rights Agreement dated as of November 18, 2009 between SINA Corporation
and American Stock Transfer & Trust Company, as Rights Agent (Filed as Exhibit 4.2 to the
Companys Report on Form 6-K filed on November 20, 2009, and incorporated herein by
reference).4.1
    
    Form of Indemnification Agreement between SINA.com and each of its officers and directors
(Filed as Exhibit 10.1 to the Companys Registration Statement on Form F-1, Registration No.
333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.2
    
    SRS International Ltd. 1997 Stock Option Plan and form of incentive stock option agreement
(Filed as Exhibit 10.2 to the Companys Registration Statement on Form F-1, Registration No.
333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.3
    
    Sinanet.com 1997 Stock Plan and form of stock option agreement (Filed as Exhibit 10.3 to the
Companys Registration Statement on Form F-1, Registration No. 333-11718, filed on March 27,
2000, as amended, and incorporated herein by reference).4.4
    
    Amended SINA.com 1999 Stock Plan and form of share option agreement (Filed as Exhibit 10.4
to the Companys Registration Statement on Form F-1, Registration No. 333-11718, filed on
March 27, 2000, as amended, and incorporated herein by reference).4.5
    
    Form of share option agreement under the amended SINA.com 1999 Stock Plan (Filed as Exhibit
10.5 to the Companys Annual Report on Form 10-K filed on March 16, 2005 and incorporated by
reference herein).4.6
    
    1999 Directors Stock Option Plan (Filed as Exhibit 10.6 to the Companys Registration
Statement on Form F-1, Registration No. 333-11718, filed on March 27, 2000, as amended, and
incorporated herein by reference).4.7
    
    Form of nonstatutory stock option agreement under the 1999 Directors Stock Option Plan
(Filed as Exhibit 10.6 to the Companys Registration Statement on Form F-1, Registration No.
333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.8
    
    SINA.com 1999 Executive Stock Plan (Filed as Exhibit 10.19 to the Companys Registration
Statement on Form F-1, Registration No. 333-11718, filed on March 27, 2000, as amended, and
incorporated herein by reference).4.9
    
    Lease Agreement of Ideal International Plaza between the Registrants subsidiaries or VIEs
and Beijing Zhongwu Ideal Real Estate Development Co., Ltd. for the office located in Ideal
International Plaza, 58 North 4th Ring Road West, Haidian,, Beijing, PRC, and the list of
the lease agreements (Filed as Exhibit 4.9 to the Companys Report on Form 20-F filed on
June 29, 2009, and incorporated herein by reference).4.10
    
    Business Cooperation Agreement dated March 7, 2000 between Beijing SINA Internet Information
Services Co., Ltd. and Beijing Stone Rich Sight Information Technology Co., Ltd. (currently
known as Beijing SINA Information Technology Co., Ltd.) (Filed as Exhibit 10.23 to the
Companys Registration Statement on Form F-1, Registration No. 333-11718, filed on March 27,
2000, as amended, and incorporated herein by reference).4.11
    
    Equipment and Leased Line Transfer Agreement dated March 7, 2000 between Beijing SINA
Internet Information Services Co., Ltd. and Beijing Stone Rich Sight Information Technology
Co., Ltd.
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ExhibitNumber
    
    Description(currently known as Beijing SINA Information Technology Co., Ltd.) (Filed as
Exhibit 10.23 to the Companys Registration Statement on Form F-1, Registration No.
333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.12
    
    Advertising Agency Agreement dated March 7, 2000 between Beijing SINA Internet Information
Services Co., Ltd. and SINA.com (currently known as SINA Corporation) (Filed as Exhibit
10.26 to the Companys Registration Statement on Form F-1, Registration No. 333-11718, filed
on March 27, 2000, as amended, and incorporated herein by reference).4.13
    
    Advertisement Production and Technical Service Agreement dated March 7, 2000 between Beijing
Stone Rich Sight Information Technology Co., Ltd. (currently known as Beijing SINA
Information Technology Co., Ltd.) and Beijing SINA Interactive Advertising Co. Ltd. (Filed
as Exhibit 10.27 to the Companys Registration Statement on Form F-1, Registration No.
333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.14
    
    Advertising Publication and Cooperation Agreement dated March 7, 2000 between Beijing SINA
Internet Information Services Co., Ltd. and Beijing SINA Interactive Advertising Co., Ltd.
(Filed as Exhibit 10.28 to the Companys Registration Statement on Form F-1, Registration
No. 333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.15
    
    Amendment to Advertising Agency Agreement dated April 1, 2000 between Beijing SINA
Interactive Advertising Co., Ltd. and SINA.com (currently known as SINA Corporation) (Filed
as Exhibit 10.37 to the Companys Registration Statement on Form F-1, Registration No.
333-11718, filed on March 27, 2000, as amended, and incorporated herein by reference).4.16
    
    Amendment to Advertisement Publication and Cooperation Agreement dated April 1, 2000 between
Beijing SINA Interactive Advertising Co., Ltd. and Beijing SINA Internet Information
Services Co., Ltd. (Filed as Exhibit 10.38 to the Companys Registration Statement on Form
F-1, Registration No. 333-11718, filed on March 27, 2000, as amended, and incorporated
herein by reference).4.17
    
    Amendment to Advertising Production and Technical Service Agreement dated April 1, 2000
between Beijing Stone Rich Sight Information Technology Co., Ltd. (currently known as
Beijing SINA Information Technology Co., Ltd.) and Beijing SINA Interactive Advertising Co.,
Ltd. (Filed as Exhibit 10.39 to the Companys Registration Statement on Form F-1,
Registration No. 333-11718, filed on March 27, 2000, as amended, and incorporated herein by
reference).4.18
    
    E-Commerce Cooperation Agreement dated April 1, 2000 between Beijing Stone Rich Sight
Information Technology Co., Ltd. (currently known as Beijing SINA Information Technology
Co., Ltd.) and Beijing SINA Internet Information Services Co., Ltd (Filed as Exhibit 10.40
to the Companys Registration Statement on Form F-1, Registration No. 333-11718, filed on
March 27, 2000, as amended, and incorporated herein by reference).4.19
    
    Share Pledge Agreements (18 agreements in total) between SINA.com Technology (China) Co.,
Ltd. (a subsidiary of the Company) and certain employees of the Company in relation to
significant Variable Interest Entities controlled by the Company (Filed as Exhibit 4.19 to
the Companys Report on Form 20-F filed on June 29, 2009, and incorporated herein by
reference).4.20
    
    Loan Agreements (18 agreements in total) between Sina.com Technology (China) Co., Ltd (a
subsidiary of the Company) and certain employees of the Company for funding significant
Variable Interest Entities controlled by the Company (Filed as Exhibit 4.20 to the Companys
Report on Form 20-F filed on June 29, 2009, and incorporated herein by reference).4.21
    
    Agreements on Authorization to Exercise Shareholders Voting Power (18 agreements in total)
between Sina.com Technology (China) Co., Ltd (a subsidiary of the Company) and certain
employees of the Company in relation to significant Variable Interest Entities controlled by
the Company (Filed as Exhibit 4.21 to the Companys Report on Form 20-F filed on June 29,
2009, and incorporated herein by reference).4.22
    
    Translation of Technical Services Agreement dated January 1, 2008 between Beijing New Media
Information Technology Co., Ltd. and Guangzhou Media Message Technologies Inc. (Filed as
Exhibit 4.22 to the Companys Report on Form 20-F filed on June 29, 2009, and incorporated
herein by reference).4.23
    
    Translation of Internet Advertisement Publishing Technical Services Agreement dated January
1, 2008 between SINA.com Technology (China) Co.,
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ExhibitNumber
    
    DescriptionLtd and Beijing SINA Internet Information
Services Co., Ltd. (Filed as Exhibit 4.23 to the Companys Report on Form 20-F filed on June
29, 2009, and incorporated herein by reference).4.24
    
    Translation of Technical Services Agreement dated January 1, 2008 between Beijing New Media
Information Technology Co., Ltd. and Shenzhen Wang Xing Technology Co., Ltd. (Filed as
Exhibit 4.24 to the Companys Report on Form 20-F filed on June 29, 2009, and incorporated
herein by reference).4.25
    
    Translation of Mobile Value Added Technical Services Agreement dated January 1, 2008 between
SINA.com Technology (China) Co., Ltd. and Beijing SINA Internet Information Services Co.,
Ltd. (Filed as Exhibit 4.25 to the Companys Report on Form 20-F filed on June 29, 2009, and
incorporated herein by reference).4.26
    
    Translation of Internet Advertisement Publishing Technical Services Agreement dated January
1, 2008 between SINA.com Technology (China) Co., Ltd. and Beijing SINA Infinity Advertising
Co., Ltd. (Filed as Exhibit 4.26 to the Companys Report on Form 20-F filed on June 29,
2009, and incorporated herein by reference).4.27
    
    Change of Control Agreement dated February 1, 2001 with Charles Chao (Filed as Exhibit 10.48
to the Companys Report on Form 10-Q for the three month period ended March 31, 2001, and
incorporated herein by reference).4.28
    
    Stock Purchase Agreement dated February 24, 2004, among SINA, Crillion, the shareholders of
Crillion listed on Part I of Exhibit A of the Stock Purchase Agreement and the individuals
listed on Part II of Exhibit A of the Stock Purchase Agreement (Filed as Exhibit 2.1 to the
Companys Report on Form 8-K filed on April 7, 2004, and incorporated herein by reference).4.29
    
    Amendment Agreement dated March 23, 2004, among SINA, Crillion, the shareholders of Crillion
listed on Part I of Exhibit A of the Stock Purchase Agreement and the individuals listed on
Part II of Exhibit A of the Stock Purchase Agreement (Filed as Exhibit 2.2 to the Companys
Report on Form 8-K filed on April 7, 2004, and incorporated herein by reference).4.30
    
    Equity Transfer Agreement dated February 24, 2004, among the individuals listed on Schedule
A attached to the Equity Transfer Agreement, Shenzhen Wang Xing Technology Co., Ltd., a
limited liability company organized and existing under the laws of the Peoples Republic of
China, and the individuals listed on Schedule B attached to the Equity Transfer Agreement
(Filed as Exhibit 2.3 to the Companys Report on Form 8-K filed on April 7, 2004, and
incorporated herein by reference).4.31
    
    Stock Purchase Agreement dated July 1, 2004 among SINA Corporation, Davidhill Capital Inc.,
the shareholders of Davidhill Capital Inc. listed on Part I of Exhibit A to such agreement,
and the company and individuals listed on Part II of Exhibit A to such agreement. (Filed as
Exhibit 2.1 to the Companys Report on Form 8-K filed on October 22, 2004, and incorporated
herein by reference).4.32
    
    Amendment Agreement dated October 13, 2004 among SINA Corporation, Davidhill Capital Inc.,
the shareholders of Davidhill Capital Inc. listed on Part I of Exhibit A to the Stock
Purchase Agreement, and the company and individuals listed on Part II of Exhibit A to the
Stock Purchase Agreement. (Filed as Exhibit 2.2 to the Companys Report on Form 8-K filed on
October 22, 2004, and incorporated herein by reference).4.33
    
    Asset Purchase Agreement dated July 1, 2004 by and between Guiyang Longmaster Information
Technology Co., Ltd. and Beijing Davidhill Internet Technology Service Co., Ltd. (Filed as
Exhibit 2.3 to the Companys Report on Form 8-K filed on October 22, 2004, and incorporated
herein by reference).4.34
    
    2007 Share Incentive Plan (Filed as Exhibit 4.2 to the Companys Report on Form S-8 filed on
July 26, 2007, and incorporated herein by reference).4.35
    
    Form of share option agreement for non-employee directors under the 2007 Share Incentive
Plan (Filed as Exhibit 4.44 to the Companys Report on Form 20-F filed on June 30, 2008, and
incorporated herein by reference).4.36
    
    Form of restricted share unit agreement for existing service providers under the 2007 Share
Incentive Plan (Filed as Exhibit 4.45 to the Companys Report on Form 20-F filed on June 30,
2008, and incorporated herein by reference).4.37
    
    Form of performance restricted share unit agreement under the 2007 Share Incentive Plan
(Filed as Exhibit 4.46 to the Companys Report on Form 20-F filed on June 30, 2008, and
incorporated herein by reference).4.38
    
    Form of share option agreement for existing service providers under the 2007 Share Incentive
Plan (Filed as Exhibit 4.47 to the Companys Report on Form 20-F filed on June 30, 2008, and
incorporated
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ExhibitNumber
    
    Descriptionherein by reference).4.39
    
    Form of restricted share unit agreement for existing service providers under the 2007 Share
Incentive Plan (Filed as Exhibit 4.40 to the Companys Report on Form 20F filed on June 29,
2009, and incorporated herein by reference).4.40
    
    Form of restricted share unit agreement for existing service providers under the 2007 Share
Incentive Plan (Filed as Exhibit 4.41 to the Companys Report on Form 20-F filed on June 29,
2009, and incorporated herein by reference).4.41*
    
    Share Subscription Agreement dated as of September 22, 2009 by and between New-Wave
Investment Holding Company Limited and the Company.4.42*
    
    Letter Amendment dated as of September 23, 2009 by and between New-Wave Investment Holding
Company Limited and the Company.4.43*
    
    Amended and Restated Registration Rights Agreement dated as of November 18, 2009 by and
between New-Wave Investment Holding Company Limited and the Company.4.44*
    
    Share Purchase Agreement, dated July 23, 2009, between CRIC Holdings Limited and the Company.4.45*
    
    Amendment Agreement to the Share Purchase Agreement, dated September 29, 2009, between China
Real Estate Information Corporation and the Company.4.46*
    
    Amendment Agreement to the Share Purchase Agreement, dated October 17, 2009, between China
Real Estate Information Corporation and the Company.4.47*
    
    Shareholders Agreement, dated October 21, 2009, by and among the China Real Estate
Information Corporation, E-House (China) Holdings Limited and the Company.4.48*
    
    Registration Rights Agreement, dated October 21, 2009, by and among the China Real Estate
Information Corporation, E-House (China) Holdings Limited and the Company.4.49*
    
    English translation of Amended and Restated Advertising Inventory Sale Agency Agreement,
dated August 31, 2009, between the Company and China Online Housing Technology Corporation.4.50*
    
    Domain Name and Content License Agreement, dated September 2009, between Beijing SINA
Internet Information Service Co., Ltd. and Beijing Yisheng Leju Information Services Co.,
Ltd.4.51*
    
    Trademark License Agreement, dated September 2009, between Beijing SINA Internet Information
Service Co., Ltd. and Beijing Yisheng Leju Information Services Co., Ltd.4.52*
    
    Software License and Support Services Agreement, dated September 2009, between SINA.com
Technology (China) Co. Ltd. and Shanghai SINA Leju Information Technology Co., Ltd.8.1*
    
    List of Subsidiaries.12.1**
    
    Certificate of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a)
and 15d-14(a) as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.12.2**
    
    Certificate of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a)
and 15d-14(a) as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.13.1**
    
    Certificate of Chief Executive Officer pursuant to 18 U.S.C. section 1350.13.2**
    
    Certificate of Chief Financial Officer pursuant to 18 U.S.C. section 1350.15.1*
    
    Consent of Independent Registered Public Accounting Firm.15.2*
    
    Consent of Jun He Law offices.15.3**
    
    Consolidated financial statements of China Real Estate Information Corporation for the
fiscal years ended December 31, 2009, 2008 and 2007.15.4**
    
    Consent of Deloitte Touche Tohmatsu CPA Ltd., independent registered public accounting firm
of China Real Estate Information Corporation.
 
 *
    
    Previously filed as an exhibit to the Companys 2009 Form 20-F.**
    
    Filed herewith. 5




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SIGNATURES
  SINA CorporationBy:
    /s/ Charles ChaoCharles ChaoDate: June 10, 2010
    
    President and Chief Executive Officer 6