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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

SIMON PROPERTY GROUP, L.P.
(Exact name of registrant as specified in its charter)

            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 ý NO o

            Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o

            Indicate by check mark whether Registrant is an accelerated filer (as defined by Rule 12b-2 of the Securities Exchange Act of 1934). YES o NO ý

            Registrant had no publicly-traded voting equity as of June 30, 2003.

            Registrant has no common stock outstanding.

Documents Incorporated By Reference

            Portions of Simon Property Group, Inc.'s Proxy Statement in connection with its 2004 Annual Meeting of Shareholders are incorporated by reference in Part III.

SIMON PROPERTY GROUP, L.P.
Annual Report on Form 10-K
December 31, 2003

TABLE OF CONTENTS

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Part I

Item 1. Business

Background

            Simon Property Group, L.P. (the "Operating Partnership"), a Delaware limited partnership, is a majority owned subsidiary of Simon Property Group, Inc. ("Simon Property"), a Delaware corporation. Simon Property is a self-administered and self-managed real estate investment trust ("REIT"). In this report, the terms "we", "us" and "our" refer to the Operating Partnership and its subsidiaries.

            We are engaged primarily in the ownership, operation, leasing, management, acquisition, expansion and development of real estate properties. Our real estate properties consist primarily of regional malls and community shopping centers. As of December 31, 2003, we owned or held an interest in 245 income-producing properties in North America, which consisted of 174 regional malls, 67 community shopping centers, and four office and mixed-use properties in 37 states and Canada (collectively, the "Properties", and individually, a "Property"). Mixed-use properties are properties that include a combination of retail space, office space, and/or hotel components. In addition, we also own interests in three parcels of land held for future development (together with the Properties, the "Portfolio"). Finally, we have ownership interests in 47 assets in Europe (France, Italy, Poland and Portugal).

Mergers and Acquisitions

            Mergers and acquisitions have been a significant component of the growth and development of our business. In 2003, we completed a series of acquisitions that added to our overall portfolio:

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On March 14, 2003, we purchased the remaining minority interest in The Forum Shops at Caesars in Las Vegas, NV for $174.0 million in cash and assumed our $74.2 million share of debt from the minority limited partner.

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On August 20, 2003, we purchased a 100% leasehold stake in Stanford Shopping Center in Palo Alto, California from Stanford University for $333.0 million. Stanford University holds, as lessor, a long-term ground lease underlying the asset.

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In the fourth quarter 2003, through a series of transactions, we increased our ownership interest in Kravco Investments L.P., a Philadelphia, PA based owner of regional malls, and acquired additional interests in Kravco's affiliated management company, for approximately $293 million. The portfolio consists of six regional malls, five of which are in the Philadelphia metropolitan area, and four community centers.

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Finally, in December 2003, we increased our presence in Europe through the formation of Gallerie Commerciali Italia S.p.A ("GCI") with The Rinascente Group, an Italian retailer company. The Rinascente Group contributed 38 shopping centers as well as development opportunities to GCI and then sold 49% of GCI to one of our affiliates. The initial gross value of GCI was approximately €860 million or over $1.0 billion and our initial equity investment was approximately €187 million, or $232 million.

            On October 8, 2003, Simon Property and Westfield America, Inc. ("Westfield"), the U.S. subsidiary of Westfield America Trust, withdrew their tender offer for all of the outstanding common shares of Taubman Centers, Inc. The withdrawal of the tender offer followed the enactment of a law amending the Michigan Control Share Acquisitions Act which allowed the Taubman family group to effectively block their ability to conclude the tender offer. Under the terms of our partnership agreement, we reimburse the operating expenses incurred by Simon Property. As a result we expensed deferred acquisition costs of $10.6 million, net, related to this acquisition during 2003.

Structural Simplification

            On January 1, 2003, we acquired all of the remaining equity interests of M.S. Management Associates, Inc. (the "Management Company"). The interests acquired consist of 95% of the voting common stock and 1.25% of the non-voting stock of the Management Company and approximately 2% of the economic interests of the Management Company. The interests were acquired from Melvin Simon, Herbert Simon, and David Simon (the "Simons"), for a total purchase price of $425,000, which was equal to the appraised value of the interests as determined by an independent third party. The acquisition was unanimously approved by the independent directors of Simon Property. As a result, the Management Company is now our wholly owned consolidated taxable REIT subsidiary.

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Dispositions

            As part of our strategic plan to own quality retail real estate, we continually evaluate our properties and sell those which no longer meet our strategic criteria. We may use the capital generated from these dispositions to invest in higher-quality, higher-growth properties. We believe that the sale of these non-core Properties will not have a material impact on our future results of operations or cash flows nor will their sale materially affect our ongoing operations. In addition, we expect any earnings dilution from the sales on our results of operations from these dispositions will be offset by the positive impact of our acquisitions and development and redevelopment activities.

            During 2003, we sold 13 non-core Properties, consisting of seven regional malls, five community centers and one mixed-use property. The Properties and their dates of sale were:

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Richmond Square, Mounds Mall, Mounds Mall Cinema and Memorial Mall on January 9, 2003

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Forest Village Park Mall on April 29, 2003

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North Riverside Park Plaza on May 8, 2003

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Memorial Plaza on May 21, 2003

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Fox River Plaza on May 22, 2003

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Eastern Hills Mall on July 1, 2003

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New Orleans Center on October 1, 2003

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Mainland Crossing on October 28, 2003

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SouthPark Mall on November 3, 2003

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Bergen Mall on December 12, 2003

Operating Policies and Strategies

            The following is a discussion of our investment policies, financing policies, conflict of interest policies and policies with respect to certain other activities, which are consistent with those of Simon Property, our general partner. The Simon Property Board of Directors may amend or rescind these policies from time to time at its discretion without a stockholder vote.

Investment Policies

            Our primary business objectives are to increase Funds From Operations ("FFO") per share, operating results and the value of our Properties while maintaining a stable balance sheet consistent with our financing policies. We intend to achieve these objectives by:

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pursuing a leasing strategy that capitalizes on the desirable location of our Properties;

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improving the performance of our Properties by using the economies of scale that result from our size to help control operating costs and by generating additional revenues through merchandising, marketing and promotional activities;

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renovating and/or expanding our Properties where appropriate;

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developing new shopping centers which meet our economic criteria; and

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acquiring additional shopping centers and the portfolios of other retail real estate companies that meet our investment criteria.

            We cannot assure you, however, that we will achieve our business objectives.

            We develop and acquire properties to generate both current income and long-term appreciation in value. We do not have a policy limiting the amount or percentage of assets that may be invested in any particular property or type of property or in any geographic area. We may purchase or lease properties for long-term investment or develop, redevelop, and/or sell our Properties, in whole or in part, when circumstances warrant. We participate with other entities in property ownership, through joint ventures or other types of co-ownership. These equity investments may be subject to existing mortgage financing and other indebtedness that have priority over our equity interest.

            While we emphasize equity real estate investments, we may, in our discretion, invest in mortgages and other real estate interests consistent with Simon Property's qualification as a REIT under the Internal Revenue Code ("Code"). Mortgages in which we invest may or may not be insured by a governmental agency. We do not intend to invest to a significant extent in mortgages or deeds of trust, however, we hold an interest in one Property through a mortgage note which results in us receiving 100% of the economics of the Property. We may invest in participating or convertible mortgages, however, if we conclude that we may benefit from the cash flow or any appreciation in the value of the property.

            We may also invest in securities of other entities engaged in real estate activities or securities of other issuers. However, any of these investments would be subject to the percentage ownership limitations and gross income tests

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necessary for Simon Property's REIT qualification under the Code. These REIT limitations mean that we cannot make an investment that would cause Simon Property's real estate assets to be less than 75% of its total assets. In addition, Simon Property must derive at least 75% of its gross income from "rents from real estate" and at least 95% must be derived from rents from real estate, interest, dividends and gains from the sale or disposition of stock or securities.

            Subject to these REIT limitations, we and Simon Property may invest in the securities of other issuers in connection with acquisitions of indirect interests in real estate. Such an investment would normally be in the form of general or limited partnership or membership interests in special purpose partnerships and limited liability companies that own one or more properties. We may, in the future, acquire all or substantially all of the securities or assets of other REITs, management companies or similar entities where such investments would be consistent with our investment policies. We do not intend to invest in securities of other issuers for the purpose of exercising control other than certain wholly-owned subsidiaries and to acquire interests in real estate. We do not intend that our investments in securities will require us to register as an "investment company" under the Investment Company Act of 1940, as amended. We intend to divest securities before any such registration would be required.

Financing Policies

            We must comply with the covenant restrictions of debt agreements that limit our ratio of debt to total market valuation. For example, our lines of credit and the indentures for our debt securities contain covenants that restrict the total amount of debt to 60% of adjusted total assets, as defined, and secured debt to 55% of adjusted total assets. In addition, these agreements contain other covenants requiring compliance with financial ratios. Furthermore, the amount of debt that we may incur is limited as a practical matter by our desire to maintain acceptable ratings for Simon Property's equity securities and our debt securities.

            If the Simon Property Board of Directors determines to seek additional capital, we may raise such capital through additional debt financing, creation of joint ventures with existing ownership interests in Properties, retention of cash flows or a combination of these methods. Our ability to retain cash flows is subject to Internal Revenue Code provisions requiring REITs to distribute a certain percentage of their taxable income. We must also take into account taxes that would be imposed on undistributed taxable income. If Simon Property determines to raise additional equity capital at the Operating Partnership level, it may as our general partner, without limited partner approval, issue additional units. Simon Property may issue units in any manner and on such terms and for such consideration as it deems appropriate. This may include issuing units in exchange for property. Such securities may be senior to the outstanding classes of our units. Such securities also may include additional classes of preferred units which may be convertible into units. Existing unitholders will have no preemptive right to purchase units in any subsequent offering of our securities. Any such offering could dilute a unitholder's investment in us.

            We anticipate that any additional borrowings would be in the form of bank borrowings, publicly and privately placed debt instruments, or purchase money obligations to the sellers of properties. Any of such indebtedness may be unsecured or may be secured by any or all of our assets or any existing or new property-owning partnership. Any such indebtedness may also have full or limited recourse to all or any portion of the assets of any of the foregoing. Although we may borrow to fund the payment of dividends, we currently have no expectation that we will regularly be required to do so.

            We may obtain unsecured or secured lines of credit. We also may determine to issue debt securities. Any such debt securities may be convertible into units or be accompanied by warrants to purchase units. We also may sell or securitize our lease receivables. The proceeds from any borrowings or financings may be used for the following:

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financing acquisitions;

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developing or redeveloping properties;

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refinancing existing indebtedness;

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working capital or capital improvements; or

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meeting the income distribution requirements applicable to REITs if Simon Property has income without the receipt of cash sufficient to enable it to meet such distribution requirements.

            We also may determine to finance acquisitions through the following:

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issuance of additional units of limited partnership interest;

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sale or exchange of ownership interests in Properties;

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•

issuance of shares of preferred units;

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issuance of other securities.

            The ability to offer units to transferors may result in beneficial tax treatment for the transferors. This is because the exchange of units for properties may defer the recognition of gain for tax purposes by the transferor. It may also be an advantage for us since certain transferors may be limited in the number of units that they may purchase.

            If the Simon Property Board of Directors determines to obtain additional debt financing, we intend to do so generally through mortgages on Properties, drawings against revolving lines of credit or term loan facilities, or the issuance of unsecured debt. We may do this directly or through an entity owned or controlled by us. The mortgages may be non-recourse, recourse, or cross-collateralized. We do not have a policy limiting the number or amount of mortgages that may be placed on any particular property. Mortgage financing instruments, however, usually limit additional indebtedness on such properties.

            We only invest in or form special purpose entities to obtain permanent financing for properties on attractive terms. Permanent financing for properties is typically structured as a mortgage loan on one or a group of properties in favor of an institutional third party or as a joint venture with a third party or as a securitized financing. For securitized financings, we are required to create special purpose entities to own the properties. These special purpose entities are structured so that they would not be consolidated with us in the event we would ever become subject to a bankruptcy proceeding. We decide upon the structure of the financing based upon the best terms then available to us and whether the proposed financing is consistent with our other business objectives. For accounting purposes, we include the outstanding securitized debt of special purpose entities owning consolidated properties as part of our consolidated indebtedness.

Conflicts of Interest Policies

            We maintain policies and have entered into agreements designed to reduce or eliminate potential conflicts of interest. In 2003, Simon Property adopted governance principles governing its affairs and the Simon Property Board of Directors, as well as written charters for each of the standing Committees of the Simon Property Board of Directors. In addition, in 2003, the Simon Property Board of Directors adopted a Code of Business Conduct and Ethics which apply to all of its officers, directors, and employees. At least a majority of the members of the Simon Property Board of Directors must qualify as independent under the listing standards for New York Stock Exchange companies and cannot be affiliated with the Simon and DeBartolo families. Any transaction between us and the Simons or the DeBartolos, including property acquisitions, service and property management agreements and retail space leases, must be approved by a majority of non-affiliated directors.

            The sale of any property may have an adverse tax impact on the Simons or the DeBartolos and the other limited partners. In order to avoid any conflict of interest between Simon Property and our limited partners, Simon Property's charter requires that at least six of the independent directors must authorize and require us to sell any property we own. Any such sale is subject to applicable agreements with third parties. Noncompetition agreements executed by each of the Simons contain covenants limiting the ability of the Simons to participate in certain shopping center activities in North America.

Policies With Respect To Certain Other Activities

            We do not intend to make investments other than as previously described. We intend to make investments in such a manner as to be consistent with the REIT requirements of the Code applicable to Simon Property, unless the Simon Property Board of Directors determines that it is no longer in Simon Property's best interests to qualify as a REIT. The Simon Property Board of Directors may make such a determination because of changing circumstances or changes in the REIT requirements. We have authority to offer units or other securities in exchange for property. We also have authority to repurchase or otherwise reacquire our units or any other securities. We may engage in such activities in the future. We have not made loans to other entities or persons, including our officers and directors. It is now our policy to not make any loans to our directors and executive officers for any purpose and all loans previously made to current executive officers have been repaid in full. We may in the future make loans to the Management Company and to joint ventures in which we participate. We do not intend to engage in the following:

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trading, underwriting or agency distribution or sale of securities of other issuers; or

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the active trade of loans and investments.

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Operating Strategies

            We plan to achieve our primary business objectives through a variety of methods discussed below, although we cannot assure you that we will achieve such objectives.

            Leasing.    We pursue a leasing strategy that includes:

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marketing available space to maintain or increase occupancy levels;

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renewing existing leases and originating new leases at higher base rents per square foot;

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negotiating leases that allow us to recover from our tenants for the majority of our property operating, real estate tax, repairs and maintenance, and advertising and promotion expenditures; and

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executing leases that provide for percentage or overage rents and/or regular or periodic fixed contractual increases in base rents.

            Management.    We draw upon our expertise gained through management of a geographically diverse Portfolio, nationally recognized as comprising high quality retail and mixed-use Properties. In doing so, we seek to maximize cash flow through a combination of:

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an active merchandising program to maintain our shopping centers as inviting shopping destinations;

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efforts to minimize overhead and operating costs which not only benefits our operations but also reduces the costs reimbursed to us from our tenants. A tenant's ability to pay rent is affected by the percentage of its sales represented by occupancy costs, which consist of rent and expense recoveries. As sales levels increase, if expenses subject to recovery are controlled, the tenant can afford to pay higher base rent.

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coordinated marketing and promotional activities that establish and maintain customer loyalty; and

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systematic planning and monitoring of results.

            We believe that if we are successful in our efforts to increase sales while controlling operating expenses we will be able to continue to increase base rents at the Properties.

            We manage substantially all our Properties held as joint venture Properties and as a result we derive revenues from management fees and other fee revenues.

            Other Revenues.    Due to our size, tenant and vendor relationships, we also generate revenues from other sources, including:

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Simon Brand Venture ("Simon Brand") which obtains revenues from establishing our malls as leading market resource providers for retailers and other businesses and consumer-focused corporate alliances. Simon Brand revenues include payment services, national media contracts, a national beverage contract and other contracts with national companies.

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Simon Brand also pursues mall marketing initiatives, including the sale of gift cards. We tested a Simon Visa Gift Card in some of our regional malls in the fall of 2001 and completed the roll-out of our Simon Gift Card program to substantially all our regional malls during 2002 and 2003. The gift card program has replaced our existing paper certificates.

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Simon Business Network ("Simon Business") obtains revenues from offering products and property operating services, resulting from its relationships with vendors, to our tenants and others. These services include such items as energy services, facility services, waste handling, vertical transportation, as well as major capital expenditures such as roofing, parking lots and energy systems. The tenant services provided through Simon Business include a national waste management services program, a national total facility service program which includes operational and maintenance services, a national automatic teller machine program, a national security services program, and parking service programs.

            We also generate other revenues through the sale of land adjacent to our Properties commonly referred to as "outlots" or "outparcels." We create value in these outparcels through the operating performance of our Properties and replenish the inventory of these parcels by the development of new Properties and the redevelopment of existing or acquired Properties.

            International Expansion.    Our investments in Europe are currently conducted through two joint ventures, GCI and European Retail Enterprises, B.V. ("ERE"). We do not derive any significant consolidated revenues from European activities since our investments are held through joint ventures and therefore are accounted for under the equity method as defined by accounting policies generally accepted in the United States.

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            We believe that the expertise we have gained through the development, leasing, management, and marketing of our domestic Properties can be utilized in retail properties abroad. We may pursue additional international opportunities to enhance shareholder value under the right circumstances. There are risks inherent in international operations that may be beyond our control. These include the following risks that may have a negative impact on our results of operations:

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changes in foreign currency exchange rates;

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declines in economic conditions abroad;

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changes in foreign political environments; and

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changes in foreign laws.

Competition

            We consider our principal competitors to be seven other major United States or internationally publicly-held, companies that own or operate regional malls in the United States. We also compete with many commercial developers, real estate companies and other owners of retail real estate that operate in our trade areas. Some of our Properties are of the same type and are within the same market area as other competitive properties. The existence of competitive properties could have a material adverse effect on our ability to lease space and on the level of rents we can obtain. This results in competition for both the acquisition of prime sites (including land for development and operating properties) and for tenants to occupy the space that we and our competitors develop and manage. In addition, our malls compete against non-physical based forms of retailing such as catalog companies and e-commerce websites that offer similar retail products.

            We believe that our Portfolio is the largest, as measured by gross leasable area ("GLA"), of any publicly-traded retail REIT or partnership. In addition, we own more regional malls than any other publicly-traded REIT or partnership. We believe that we have a competitive advantage in the retail real estate business as a result of:

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the size, quality and diversity of our Properties

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our management and operational expertise

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our extensive experience and relationships with retailers and lenders

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our mall marketing initiatives and consumer focused strategic corporate alliances including those developed by Simon Brand and Simon Business, and

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our ability to use our size to reduce the total occupancy cost of our tenants.

            Our size has allowed us to reduce dependence upon individual retail tenants. More than 3,800 different retailers occupy more than 20,800 stores in our Properties and no retail tenant represents more than 4.6% of our Properties' total minimum rents.

Environmental Matters

            General Compliance.    We believe that the Portfolio is in compliance, in all material respects, with all Federal, state and local environmental laws, ordinances and regulations regarding hazardous or toxic substances. Nearly all of the Portfolio has been subjected to Phase I or similar environmental audits (which generally involve only a review of records and visual inspection of the property without soil sampling or ground water analysis) by independent environmental consultants. Phase I environmental audits are intended to discover information regarding, and to evaluate the environmental condition of, the surveyed properties and surrounding properties. These environmental audits have not revealed, nor are we aware of, any environmental liability that we believe will have a material adverse effect on our results of operations. We cannot assure you that:

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existing environmental studies with respect to the Portfolio reveal all potential environmental liabilities;

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any previous owner, occupant or tenant of a Property did not create any material environmental condition not known to us;

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the current environmental condition of the Portfolio will not be affected by tenants and occupants, by the condition of nearby properties, or by other unrelated third parties; or

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future uses or conditions (including, without limitation, changes in applicable environmental laws and regulations or the interpretation thereof) will not result in environmental liabilities.

            Asbestos-Containing Materials.    Asbestos-containing materials are present in most of the Properties, primarily in the form of vinyl asbestos tile, mastics and roofing materials, which we believe are generally in good condition.

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Fireproofing and insulation containing asbestos is also present in certain Properties in limited concentrations or in limited areas. The presence of such asbestos-containing materials does not violate currently applicable laws. Generally, we remove asbestos-containing materials as required in the ordinary course of any renovation, reconstruction, or expansion, and in connection with the retenanting of space.

            Underground Storage Tanks.    Several of the Properties contain, or at one time contained, underground storage tanks used to store waste oils or other petroleum products primarily related to auto service center establishments or emergency electrical generation equipment. We believe that regulated tanks have been removed, upgraded or abandoned in accordance with applicable environmental laws. Site assessments have revealed certain soil and groundwater contamination associated with such tanks at some of these Properties. Subsurface investigations (Phase II assessments) and remediation activities are either completed, ongoing, or scheduled to be conducted at such Properties. The costs of remediation with respect to such matters has not been material and we do not expect these costs will have a material adverse effect on our results of operations.

            Properties to be Developed or Acquired.    Land held for mall development or that may be acquired for development may contain residues or debris associated with the use of the land by prior owners or third parties. In certain instances, such residues or debris could be or contain hazardous wastes or hazardous substances. Prior to exercising any option to acquire properties, we typically conduct environmental due diligence consistent with acceptable industry standards.

Certain Activities

            During the past three years, we have:

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issued 14,383,201 units to Simon Property upon the conversion of Series A and B preferred units;

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issued 19,817 units to Simon Property in lieu of preferred dividends on Series A preferred units;

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issued 4,013,249 units to Simon Property upon the exchange of units of limited partnership interest for common stock of Simon Property;

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issued 814,491 restricted units to Simon Property, net of forfeitures, in exchange for a like number of shares issued under The Simon Property Group 1998 Stock Incentive Plan;

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issued 1,805,479 units to Simon Property in exchange for cash contributed resulting from the exercise of stock options under The Simon Property Group 1998 Stock Incentive Plan;

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issued 3,328,540 units of Series H preferred units to Simon Property in 2003 and repurchased 3,250,528 of such units in 2003 and 78,012 of such units in 2004;

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borrowed a maximum amount of $863.0 million under our $1.25 billion unsecured revolving credit facility; the outstanding amount of borrowings as of December 31, 2003 was $327.9 million;

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borrowed a maximum of $1.4 billion under a $1.4 billion unsecured acquisition loan taken out in connection with our merger in 1998 with Corporate Property Investors, Inc.; the outstanding balance of this loan was paid off on August 6, 2001;

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borrowed a maximum of $600 million under a $600 million 12-month acquisition credit facility taken out in connection with the Rodamco acquisition; the outstanding balance of this acquisition credit facility was paid off during the third quarter of 2002;

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not made loans to other entities or persons, including our officers and directors, other than to the Management Company and certain officers to pay income taxes due upon the vesting of restricted stock; all loans previously made to current executive officers have been repaid in full;

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not invested in the securities of other issuers for the purpose of exercising control, other than certain wholly-owned subsidiaries and to acquire interests in real estate, except for 11,000 shares of Taubman Centers, Inc. common stock acquired in connection with Simon Property's withdrawn tender offer for Taubman Centers, Inc.;

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not underwritten securities of other issuers;

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not engaged in the purchase and sale or turnover of investments: and

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provided annual reports containing financial statements certified by independent public accountants and quarterly reports containing unaudited financial statements to our security holders.

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Employees

            At February 9, 2004 we and our affiliates employed approximately 4,030 persons at various properties and offices throughout the United States, of which approximately 1,590 were part-time. Approximately 860 of these employees were located at our corporate headquarters.

Corporate Headquarters

            Our corporate headquarters are located at National City Center, 115 West Washington Street, Indianapolis, Indiana 46204, and our telephone number is (317) 636-1600.

Executive Officers of the Registrant

            The following table sets forth certain information with respect to the executive officers of Simon Property, the general partner of the Operating Partnership, as of December 31, 2003.

(1)

Melvin Simon is the brother of Herbert Simon and the father of David Simon.

            Set forth below is a summary of the business experience of the executive officers of Simon Property. The executive officers of Simon Property serve at the pleasure of the Board of Directors. For biographical information of Melvin Simon, Herbert Simon, David Simon, Hans C. Mautner, and Richard S. Sokolov, see Item 10 of this report.

            Mr. Lewis is the Executive Vice President — Leasing of Simon Property. Mr. Lewis joined MSA in 1986 and held various positions with MSA and Simon Property prior to becoming Executive Vice President in charge of Leasing of Simon Property in 2002.

            Mr. Sterrett serves as Simon Property's Executive Vice President and Chief Financial Officer. He joined MSA in 1989 and held various positions with MSA until 1993 when he became Simon Property's Senior Vice President and Treasurer. He became Simon Property's Chief Financial Officer in 2001.

            Mr. Mumphrey serves as Simon Property's Executive Vice President — Property Management. He joined MSA in 1974 and also held various positions with MSA before becoming Senior Vice President of property management in 1993. In 2000, he became the President of Simon Business Network. Mr. Mumphrey became Executive Vice President — Property Management in 2002.

            Mr. Rulli serves as Simon Property's Executive Vice President — Chief Operating Officer — Operating Properties and served as Executive Vice President and Chief Administrative Officer for the majority of 2003. He joined MSA in 1988 and held various positions with MSA before becoming Simon Property's Executive Vice President in 1993 and Chief Administrative Officer in 2000. In December 2003, he was appointed to Executive Vice President — Chief Operating Officer — Operating Properties.

            Mr. Barkley serves as Simon Property's General Counsel and Secretary. Mr. Barkley holds the same position for MSA. He joined MSA in 1978 as Assistant General Counsel for Development Activity.

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            Mr. Juster serves as Simon Property's Senior Vice President and Treasurer. He joined MSA in 1989 and held various financial positions with MSA until 1993 and thereafter has held various positions with Simon Property. Mr. Juster became Treasurer in 2001.

Item 2. Properties

North American Properties

            Our Properties primarily consist of regional malls and community shopping centers. Our Properties contain an aggregate of approximately 189.4 million square feet of GLA, of which we own 108.0 million square feet ("Owned GLA"). Total estimated retail sales at the Properties in 2003 were approximately $40 billion.

            Regional malls generally contain two or more anchors and a wide variety of smaller stores ("Mall" stores) located in enclosed malls connecting the anchors. Additional stores ("Freestanding" stores) are usually located along the perimeter of the parking area. Our 174 regional malls range in size from approximately 200,000 to 2.9 million square feet of GLA, with all but four regional malls over 400,000 square feet. Our regional malls contain in the aggregate more than 18,400 occupied stores, including over 700 anchors, which are mostly national retailers.

            Community shopping centers are generally unenclosed and smaller than regional malls. Our 67 community shopping centers generally range in size from approximately 50,000 to 950,000 square feet of GLA. Community shopping centers generally are of three types. First, we own "power centers" that are designed to serve a larger trade area and contain at least two anchors, and usually as many as 5 to 7, that are usually national retailers among the leaders in their markets and occupy more than 70% of the GLA in the center. Second, we own traditional community centers that focus primarily on value-oriented and convenience goods and services. These centers are usually anchored by a supermarket, discount retailer, or drugstore and are designed to service a neighborhood area. Finally, we also own open air centers adjacent to our regional malls designed to take advantage of the drawing power of the mall.

            We also own lifestyle centers that are included in regional malls, community centers, and properties under development. These centers are typically open air centers and contain at least 50,000 square feet of GLA of specialty retail regional mall type tenants as well as restaurants.

            We also have interests in four office and mixed-use Properties. The four office and mixed-use Properties range in size from approximately 496,000 to 1,214,000 square feet of GLA. Two of these Properties are regional malls with connected office buildings, and two are located in mixed-use developments and contain primarily office space.

            The following table provides data as of December 31, 2003:

            As of December 31, 2003, approximately 92.4% of the Mall and Freestanding Owned GLA in regional malls and the retail space in the mixed-use Properties was leased, and approximately 90.2% of Owned GLA in the community shopping centers was leased.

            We own 100% of 155 of our 245 Properties, control 14 Properties in which we have a joint venture interest, and hold the remaining 76 Properties through unconsolidated joint venture interests. We are the managing or co-managing general partner or member of 234 of our Properties. Substantially all of our joint venture Properties are subject to rights of first refusal, buy-sell provisions, or other sale rights for all partners which are customary in real estate partnership agreements and the industry. Our partners in our joint ventures may initiate these provisions at any time, which will result in either the use of available cash or borrowings to acquire their partnership interest or the disposal of our partnership interest.

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SIMON PROPERTY GROUP, L.P.
PROPERTY TABLE
North American Properties

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SIMON PROPERTY GROUP, L.P.
PROPERTY TABLE
North American Properties