SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

x

Rule 13d-1(c)

o

Rule 13d-1(d)

CUSIP No. G81477104

1

Names of Reporting Persons
Fosun International Limited

2

Check the Appropriate Box if a Member of a Group* (See Instructions)

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Hong Kong

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
5,637,226 (1)

7

Sole Dispositive Power
0

8

Shared Dispositive Power
5,637,226 (1)

9

Aggregate Amount Beneficially Owned by Each Reporting Person
5,637,226 (1)

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
9.2% (2)

12

Type of Reporting Person (See Instructions)
CO

(1)

Includes 4,707,555 Ordinary Shares, $0.133 par value per share (the “Ordinary Shares”), of SINA Corporation (the “Issuer”), and 929,671 Ordinary Shares that are issuable within 60 days of the date of this Schedule 13G upon conversion of convertible notes (the “Convertible Notes”).

(2)

This percentage is calculated based on 60,034,428 Ordinary Shares of the Issuer reported as issued and outstanding as of December 31, 2014 in the Issuer’s Form 20-F filed with the Securities and Exchange Commission on April 29, 2015 and assumes the conversion of the Convertible Notes.

CUSIP No. G81477104

1

Names of Reporting Persons
Fidelidade-Companhia de Seguros, S.A.

2

Check the Appropriate Box if a Member of a Group* (See Instructions)

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Portugal

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
5,105,385 (1)

7

Sole Dispositive Power
0

8

Shared Dispositive Power
5,105,385 (1)

9

Aggregate Amount Beneficially Owned by Each Reporting Person
5,105,385 (1)

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
8.4% (2)

12

Type of Reporting Person (See Instructions)
CO

(1)

Includes 4,175,714 Ordinary Shares and 929,671 Ordinary Shares that are issuable within 60 days of the date of this Schedule 13G upon conversion of the Convertible Notes.

(2)

This percentage is calculated based on 60,034,428 Ordinary Shares of the Issuer reported as issued and outstanding as of December 31, 2014 in the Issuer’s Form 20-F filed with the Securities and Exchange Commission on April 29, 2015 and assumes the conversion of the Convertible Notes.

CUSIP No. G81477104

1

Names of Reporting Persons
Peak Reinsurance Company Limited

2

Check the Appropriate Box if a Member of a Group* (See Instructions)

(a)

x

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Hong Kong

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
531,841 (1)

7

Sole Dispositive Power
0

8

Shared Dispositive Power
531,841 (1)

9

Aggregate Amount Beneficially Owned by Each Reporting Person
531,841 (1)

10

Check if the Aggregate Amount in Row (9) Excludes Certain Shares*  o

11

Percent of Class Represented by Amount in Row 9
0.9% (2)

12

Type of Reporting Person (See Instructions)
CO

(1)

Includes 531,841 Ordinary Shares.

(2)

This percentage is calculated based on 60,034,428 Ordinary Shares of the Issuer reported as issued and outstanding as of December 31, 2014 in the Issuer’s Form 20-F filed with the Securities and Exchange Commission on April 29, 2015 and assumes the conversion of the Convertible Notes.

Item 1.

(a)

Name of Issuer:
SINA Corporation

(b)

Address of Issuer’s Principal Executive Offices:
37F, Jin Mao Tower, 88 Century Boulevard, Pudong, Shanghai 200121, China

Item 2.

(a)

Name of Person Filing:
This Schedule 13G is filed by Fosun International Limited (“Fosun International”), a company organized under the laws of the Hong Kong Special Administrative Region of China (“Hong Kong”), Fidelidade — Companhia de Seguros, S.A. (“Fidelidade”), a company organized under the laws of Portugal, and Peak Reinsurance Company Limited (“Peak Reinsurance” and, together with Fosun International and Fidelidade, the “Reporting Persons”), a company organized under the laws of Hong Kong.

Fidelidade and Peak Reinsurance are each majority-owned subsidiaries of Fosun International.

(b)

Address of Principal Business Office or, if none, Residence:
The address of the principal business office for Fosun International is Room 808, ICBC Tower, 3 Garden Road, Central, Hong Kong.  The address of the principal business office for Fidelidade is Largo do Calhariz, 30, Lisbon, Portugal.  The address of the principal business office for Peak Reinsurance is Room 2107—11, ICBC Tower, 3 Garden Road, Central, Hong Kong. 

(c)

Citizenship:
See Item 2(a).

(d)

Title of Class of Securities:
Ordinary Shares, par value $0.133 per share (“Ordinary Shares”), of Issuer

(e)

CUSIP Number:
G81477104

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b), or §§ 240.13d-2(b) or (c), check whether the person filing is a:

(a)

o

Broker or dealer registered under section 15 of the Act.

(b)

o

Bank as defined in section 3(a)(6) of the Act.

(c)

o

Insurance company as defined in section 3(a)(19) of the Act.

(d)

o

Investment company registered under section 8 of the Investment Company Act of 1940.

(e)

o

An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E).

(f)

o

An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F).

(g)

o

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G).

(h)

o

A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act.

(i)

o

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act.

(j)

o

A non-U.S. institution in accordance with § 240.13d—1(b)(1)(ii)(J).

(k)

o

Group, in accordance with § 240.13d—1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with

§ 240.13d—1(b)(1)(ii)(J), please specify the type of institution:                                                        

Item 4.

Ownership.

(a)      See Item 9 of the cover pages to this Schedule 13G for the aggregate number of Ordinary Shares that are beneficially owned by each Reporting Person as of May 1, 2015.

(b)      See Item 11 of the cover pages to this Schedule 13G for the percentage of Ordinary Shares that are beneficially owned by each Reporting Person as of May 1, 2015.

(c)       See Items 5 through 8 of the cover pages to this Schedule 13G for the number of Ordinary Shares that are beneficially owned by each Reporting Person as of May 1, 2015 as to which there is sole or shared power to vote or direct the vote, and sole or shared power to dispose or direct the disposition.

Item 5.

Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following   o.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.

Not applicable.

Item 8.

Identification and Classification of Members of the Group.

See Item 2.

Item 9.

Notice of Dissolution of Group.

Not applicable.

Item 10.

Certifications.

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.

Date: May 4, 2015

FOSUN INTERNATIONAL LIMITED

By:

/s/ Qin Xuetang

Qin Xuetang

Director

FIDELIDADE — COMPANHIA DE SEGUROS, S.A.

By:

/s/ William Mak

William Mak

Chief Financial Officer

PEAK REINSURANCE COMPANY LIMITED

By:

/s/ Wang Qunbin

Wang Qunbin

Director