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Exhibit 99.1

SIMON PROPERTY GROUP
Overview

The Company

        Simon Property Group, Inc., ("Simon," "we," "us," "our," or the "Company") (NYSE:SPG) is a self-administered and self-managed real estate investment trust ("REIT"). Simon Property Group, L.P. or the Operating Partnership is a majority-owned subsidiary partnership of the Company. Together, the Company and the Operating Partnership, or Simon Group, are engaged primarily in the ownership, development and management of retail real estate properties. Simon Group operates from five retail real estate platforms: regional malls, Premium Outlet Centers®, The Mills®, community/lifestyle centers and international properties. At December 31, 2008, we owned or had an interest in 386 properties comprising 263 million square feet of gross leasable area in North America, Europe and Asia.

        This package was prepared to provide (1) ownership information, (2) certain operational information, and (3) balance sheet information as of December 31, 2008, for the Company and the Operating Partnership.

        Certain statements made in this Supplemental Package may be deemed "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Although we believe the expectations reflected in any forward-looking statements are based on reasonable assumptions, we can give no assurance that our expectations will be attained, and it is possible that actual results may differ materially from those indicated by these forward-looking statements due to a variety of risks, uncertainties and other factors. Such factors include, but are not limited to: our ability to meet debt service requirements, the availability and terms of financing, changes in our credit rating, changes in market rates of interest and foreign exchange rates for foreign currencies, the ability to hedge interest rate risk, risks associated with the acquisition, development, expansion, leasing and management of properties, general risks related to retail real estate, the liquidity of real estate investments, environmental liabilities, international, national, regional and local economic climates, changes in market rental rates, trends in the retail industry, relationships with anchor tenants, the inability to collect rent due to the bankruptcy or insolvency of tenants or otherwise, risks relating to joint venture properties, costs of common area maintenance, competitive market forces, risks related to international activities, insurance costs and coverage, terrorist activities, changes in economic and market conditions and maintenance of our status as a real estate investment trust. We discuss these and other risks and uncertainties under the heading "Risk Factors" in our annual and quarterly periodic reports filed with the SEC. We may update that discussion in our periodic reports, but otherwise we undertake no duty or obligation to update or revise these forward-looking statements, whether as a result of new information, future developments, or otherwise.

        We hope you find this Supplemental Package beneficial. Any questions, comments or suggestions should be directed to: Shelly J. Doran, Vice President of Investor Relations-Simon Property Group, P.O. Box 7033, Indianapolis, IN 46207. Telephone: (317) 685-7330; e-mail: sdoran@simon.com

5


The following information was filed by Simon Property Group Inc (SPG) on Friday, January 30, 2009 as an 8K 2.02 statement, which is an earnings press release pertaining to results of operations and financial condition. It may be helpful to assess the quality of management by comparing the information in the press release to the information in the accompanying 10-K Annual Report statement of earnings and operation as management may choose to highlight particular information in the press release.

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