UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2009

SIMON PROPERTY GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware

(State of incorporation or organization)

001-14469

(Commission File No.)

046-268599

(I.R.S. Employer Identification No.)

225 West Washington Street

Indianapolis, Indiana 46204

(Address of principal executive offices)

(317) 636-1600

(Registrant’s telephone number, including area code)

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x No o

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).  Yes x No o

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act (check one):

Large accelerated filer x	Accelerated filer o
Non-accelerated filer o (Do not check if a smaller reporting company)	Smaller reporting company o

Indicate by check mark whether Registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act).  Yes o No x

As of June 30, 2009, Simon Property Group, Inc. had 281,063,518 shares of common stock, par value $0.0001 per share and 8,000 shares of Class B common stock, par value $0.0001 per share outstanding.

Simon Property Group, Inc. and Subsidiaries

EXPLANATORY NOTE

The sole purpose of this Form 10-Q/A is to furnish the interactive data files as exhibit 101.  Exhibit 101 to this report provides the following items from our Form 10-Q formatted in Extensible Business Reporting Language (XBRL): (i) the unaudited Consolidated Balance Sheets, (ii) the unaudited Consolidated Statement of Operations and Comprehensive Income, (iii) the unaudited Consolidated Statement of Cash Flows, and (iv) the unaudited Condensed Notes to Consolidated Financial Statements.

Users of this data are advised that pursuant to Rule 406T of Regulation S-T these interactive data files are deemed not filed or part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, are deemed not filed for the purposes of section 18 of the Securities and Exchange Act of 1934, and otherwise are not subject to liability under those sections.

No other changes have been made to the Form 10-Q other than those described above.  This Amendment No. 1 does not reflect subsequent events occurring after the original filing date of the Form 10-Q or modify or update in any way disclosures made in the Form 10-Q.

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Item 6.  Exhibits

Exhibit Number	Exhibit Descriptions
31.1*	Certification by the Chief Executive Officer pursuant to rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification by the Chief Financial Officer pursuant to rule 13a-14(a)/15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32*	Certification by the Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS**	XBRL Instance Document
101.SCH**	XBRL Taxonomy Extension Schema
101.CAL**	XBRL Taxonomy Extension Calculation Linkbase
101.DEF**	XBRL Taxonomy Extension Definition Linkbase
101.LAB**	XBRL Taxonomy Extension Label Linkbase
101.PRE**	XBRL Taxonomy Extension Presentation Linkbase

*	Previously filed
**	Furnished herewith

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

SIMON PROPERTY GROUP, INC.

/S/ STEPHEN E. STERRETT

Stephen E. Sterrett

Executive Vice President and Chief Financial Officer

Date: September 4, 2009

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