[QuickLinks -- Click here to rapidly navigate through this document SINA Corporation Prices Offering of US$700 Million Convertible Senior Notes SHANGHAI, November 15, 2013 The notes will bear interest at a rate of 1.00% per year, payable semiannually in arrears on June 1 and December 1 of each year, beginning on June 1, 2014. The notes will mature on December] [FORM 6-K SINA Corporation 37F, Jin Mao Tower ý o Form 20-F o o TABLE OF CONTENTS SINA CORPORATION]

[SINA Reports Third Quarter 2013 Financial Results SHANGHAI, China—November 12, 2013— SINA Corporation (the “Company” or “SINA”) (NASDAQ GS: SINA), a leading Internet media company serving China and the global Chinese communities, today announced its unaudited financial results for the third quarter ended September 30, 2013. Third Quarter 2013 Highlights · Net revenues increased 21% year over year to $184.6] [FORM 6-K November 2013 SINA Corporation 37F, Jin Mao Tower 88 C entury B oulevard, P udong Shanghai 200 121 , China Form 20-F x Form 40-F o o o TABLE OF CONTENTS Press Release regarding Results of Operations and Financial Condition for the Third Quarter Ended September 30, 2013 , issued by SINA Corporation on November 12, 2013.]

[QuickLinks -- Click here to rapidly navigate through this document SINA Corporation Announces Proposed Offering of US$600 Million Convertible Senior Notes and SHANGHAI, November 14, 2013 —SINA Corporation (NASDAQ: SINA) ("SINA" or the "Company"), a leading Internet media company serving China and the global Chinese communities, today announced that it proposes to offer up to US$600 million in aggregate principal] [QuickLinks -- Click here to rapidly navigate through this document MANAGEMENT'S DISCUSSION AND ANALYSIS OF We issued interim financials for the nine months ended September 30, 2013 and 2012 to certain investors in conjunction with our convertible bond offering. These financials are available to all shareholders upon request. Overview We are an Internet media company serving China and the global] [QuickLinks -- Click here to rapidly navigate through this document AMENDMENT NO. 2 (1) TO RIGHTS AGREEMENT Company Rights Agent This AMENDMENT NO. 2 (this "Amendment"), dated as of November , 2013, is made by and between SINA Corporation, a Cayman Islands exempted company (the " R E C I T A L S A. Rights Agreement B. The Board] [FORM 6-K SINA Corporation 37F, Jin Mao Tower ý o Form 20-F o o TABLE OF CONTENTS Press Release regarding Launching of the Proposed Offering of Convertible Senior Notes Management's Discussion and Analysis of Financial Condition and Results of Operations Form of Amendment No. 2 to Rights Agreement]

[SINA CORPORATION NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS To Be Held on November 18, 2013 “Company AGM On Monday, November 18, 2013, SINA Corporation, a Cayman Islands company (the Record Date Only shareholders registered in the Company’s register of members at the close of business on September 20, 2013 (the “ “RESOLVED, · THAT Mr. Ter Fung Tsao shall] [EX-99.2 3 a13-21886_1ex99d2.htm EX-99.2] [FORM 6-K October 2013 SINA Corporation 37F, Jin Mao Tower 88 Century Boulevard, Pudong Shanghai 200121, China Form 20-F x Form 40-F o o o TABLE OF CONTENTS]