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

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2012

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

Delaware
(State of incorporation or organization)

333-11491
(Commission File No.)

34-1755769
(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 ý    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 ý    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):

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

        Registrant has no common stock outstanding.

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Simon Property Group, L.P. and Subsidiaries
Form 10-Q
INDEX

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Simon Property Group, L.P. and Subsidiaries
Unaudited Consolidated Balance Sheets
(Dollars in thousands, except unit amounts)

   

The accompanying notes are an integral part of these statements

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Simon Property Group, L.P. and Subsidiaries
Unaudited Consolidated Statements of Operations and Comprehensive Income
(Dollars in thousands, except per unit amounts)

   

The accompanying notes are an integral part of these statements

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Simon Property Group, L.P. and Subsidiaries
Unaudited Consolidated Statements of Cash Flows
(Dollars in thousands)

   

The accompanying notes are an integral part of these statements

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Simon Property Group, L.P. and Subsidiaries
Condensed Notes to Consolidated Financial Statements
(Unaudited)

(Dollars in thousands, except unit and per unit amounts and where indicated in millions or billions)

1.     Organization

        Simon Property Group, L.P. is a Delaware limited partnership and the majority-owned subsidiary of Simon Property Group, Inc. In these condensed notes to the unaudited consolidated financial statements, the terms "Operating Partnership", "we", "us" and "our" refer to Simon Property Group, L.P. and its subsidiaries and the term "Simon Property" refers specifically to Simon Property Group, Inc. (NYSE: SPG). Simon Property, a Delaware corporation, is a self-administered and self-managed real estate investment trust, or REIT, under the Internal Revenue Code, as amended. According to our partnership agreement, we are required to pay all expenses of Simon Property.

        We own, develop and manage retail real estate properties, which consist primarily of regional malls, Premium Outlets®, The Mills®, and community/lifestyle centers. As of March 31, 2012, we owned or held an interest in 325 income-producing properties in the United States, which consisted of 161 regional malls, 58 Premium Outlets, 70 community/lifestyle centers, 13 properties in the Mills portfolio, and 23 other shopping centers or outlet centers in 41 states and Puerto Rico. Internationally, as of March 31, 2012, we had ownership interests in eight Premium Outlets in Japan, two Premium Outlets in South Korea, one Premium Outlet in Mexico, and one Premium Outlet in Malaysia. Additionally, on March 14, 2012, we purchased a 28.7% equity stake in Klépierre, a publicly traded, Paris-based real estate company, which owns, or has an interest in, approximately 271 shopping centers located in 13 countries in Europe.

2.     Basis of Presentation

        The accompanying unaudited consolidated financial statements include the accounts of all majority-owned subsidiaries, and all significant intercompany amounts have been eliminated. Due to the seasonal nature of certain operational activities, the results for the interim period ended March 31, 2012, are not necessarily indicative of the results to be expected for the full year.

        These consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and include all of the information and disclosures required by accounting principles generally accepted in the United States (GAAP) for interim reporting. Accordingly, they do not include all of the disclosures required by GAAP for complete financial statements. In the opinion of management, all adjustments necessary for fair presentation (including normal recurring accruals) have been included. The consolidated financial statements in this Form 10-Q should be read in conjunction with the audited consolidated financial statements and related notes contained in our 2011 Annual Report on Form 10-K.

        As of March 31, 2012, we consolidated 229 wholly-owned properties and 18 additional properties that are less than wholly-owned, but which we control or for which we are the primary beneficiary. We account for the remaining 90 properties, or the joint venture properties, as well as our investment in Klépierre, using the equity method of accounting. We manage the day-to-day operations of 76 of the 90 joint venture properties, but have determined that our partner or partners have substantive participating rights with respect to the assets and operations of these joint venture properties. Our investments in joint ventures in Japan, South Korea, Malaysia, and Mexico comprise 12 of the remaining 14 joint venture properties. The international properties are managed locally by joint ventures in which we share oversight responsibility with our partner.

        We allocate our net operating results after preferred distributions based on our partners' respective weighted average ownership. Simon Property owns a majority of our common units of partnership interest, or units, and certain series of our preferred units of partnership interest, or preferred units, which have

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terms comparable to outstanding shares of Simon Property preferred stock. Simon Property's weighted average ownership interest in us was 82.9% and 83.0% for the three months ended March 31, 2012 and 2011, respectively. As of March 31, 2012 and December 31, 2011, Simon Property's ownership interest in us was 83.2% and 82.8%, respectively. We adjust the noncontrolling limited partners' interests at the end of each period to reflect their respective interests in us.

        Preferred unit requirements in the accompanying consolidated statements of operations and comprehensive income represent distributions on outstanding preferred units of partnership interests held by limited partners and are recorded when declared.

Reclassifications

        We made certain reclassifications of prior period amounts in the consolidated financial statements to conform to the 2012 presentation. These reclassifications had no impact on previously reported net income attributable to unitholders or earnings per unit.

3.     Significant Accounting Policies

Cash and Cash Equivalents

        We consider all highly liquid investments purchased with an original maturity of 90 days or less to be cash and cash equivalents. Cash equivalents are carried at cost, which approximates fair value. Cash equivalents generally consist of commercial paper, bankers' acceptances, Eurodollars, repurchase agreements, and money market deposits or securities. Financial instruments that potentially subject us to concentrations of credit risk include our cash and cash equivalents and our trade accounts receivable. We place our cash and cash equivalents with institutions with high credit quality. However, at certain times, such cash and cash equivalents are in excess of FDIC and SIPC insurance limits.

Marketable and Non-Marketable Securities

        Marketable securities consist primarily of the investments of our captive insurance subsidiaries, available-for-sale securities, our deferred compensation plan investments, and certain investments held to fund the debt service requirements of debt previously secured by investment properties that have been sold.

        The types of securities included in the investment portfolio of our captive insurance subsidiaries typically include U.S. Treasury or other U.S. government securities as well as corporate debt securities with maturities ranging from less than 1 to 10 years. These securities are classified as available-for-sale and are valued based upon quoted market prices or other observable inputs when quoted market prices are not available. The amortized cost of debt securities, which approximates fair value, held by our captive insurance subsidiaries is adjusted for amortization of premiums and accretion of discounts to maturity. Changes in the values of these securities are recognized in accumulated other comprehensive income (loss) until the gain or loss is realized or until any unrealized loss is deemed to be other-than-temporary. We review any declines in value of these securities for other-than-temporary impairment and consider the severity and duration of any decline in value. To the extent an other-than-temporary impairment is deemed to have occurred, an impairment charge is recorded and a new cost basis is established. Subsequent changes are then recognized through other comprehensive income (loss) unless another other-than-temporary impairment is deemed to have occurred.

        Our investments in Capital Shopping Centres Group PLC, or CSCG, and Capital & Counties Properties PLC, or CAPC, are accounted for as available-for-sale securities. These investments are adjusted to their quoted market price, including a related foreign exchange component, with corresponding adjustment in other comprehensive income (loss). At March 31, 2012, we owned 35.4 million shares each of CSCG and of CAPC. At March 31, 2012, the market value of our investments in

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CSCG and CAPC was $187.3 million and $108.4 million, respectively, with an aggregate net unrealized gain on these investments of approximately $63.9 million. The market value of our investments in CSCG and CAPC at December 31, 2011 was $170.7 million and $100.9 million, respectively, with an aggregate unrealized gain of $39.7 million.

        Net unrealized gains recorded in other comprehensive income (loss) as of March 31, 2012 and December 31, 2011 were approximately $66.4 million and $41.9 million, respectively, and represent the valuation and related currency adjustments for our marketable securities. As of March 31, 2012, we do not consider any of the declines in value of our marketable and non-marketable securities to be an other-than-temporary impairment, as these market value declines, if any, have existed for a short period of time, and, in the case of debt securities, we have the ability and intent to hold these securities to maturity.

        Our insurance subsidiaries are required to maintain statutory minimum capital and surplus as well as maintain a minimum liquidity ratio. Therefore, our access to these securities may be limited. Our deferred compensation plan investments are classified as trading securities and are valued based upon quoted market prices. The investments have a matching liability as the amounts are fully payable to the employees that earned the compensation. Changes in value of these securities and changes to the matching liability to employees are both recognized in earnings and, as a result, there is no impact to consolidated net income.

        As of March 31, 2012 and December 31, 2011, we also had investments of $25.2 million and $24.9 million, respectively, which must be used to fund the debt service requirements of mortgage debt related to investment properties sold that previously collateralized the debt. These investments are classified as held-to-maturity and are recorded at amortized cost as we have the ability and intent to hold these investments to maturity.

        At March 31, 2012 and December 31, 2011, we had investments of $105.1 million in non-marketable securities that we account for under the cost method. We regularly evaluate these investments for any other-than-temporary impairment in their estimated fair value and determined that no adjustment in the carrying value was required.

Loans Held for Investment

        From time to time, we may make investments in mortgage loans or mezzanine loans of third parties that own and operate commercial real estate assets located in the United States. Mortgage loans are secured, in part, by mortgages recorded against the underlying properties which are not owned by us. Mezzanine loans are secured, in part, by pledges of ownership interests of the entities that own the underlying real estate. Loans held for investment are carried at cost, net of any premiums or discounts which are accreted or amortized over the life of the related loan receivable utilizing the effective interest method. We evaluate the collectability of both interest and principal of each of these loans quarterly to determine whether the value has been impaired. A loan is deemed to be impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due according to the existing contractual terms. When a loan is impaired, the amount of the loss accrual is calculated by comparing the carrying amount of the loan held for investment to its estimated realizable value.

        At March 31, 2012 and December 31, 2011, we had investments in three mortgage and mezzanine loans with an aggregate carrying value of $162.9 million and $162.8 million, respectively. These loans mature at various dates through October 2012 with a weighted average maturity of approximately three months. Certain of these loans require interest-only payments while others require payments of interest and principal based on a 30 year amortization. Interest rates on these loans are fixed between 5.9% and 7.0% per annum with a weighted average interest rate of approximately 6.3% and approximate market rates for instruments of similar quality and duration. During the three months ended March 31, 2012 and March 31 2011, we recorded $3.1 million and $6.9 million, respectively, in interest income earned from these loans held for investment. Payments on each of these loans were current as of March 31, 2012. In April 2012, one of these mortgage loans with a principal balance of $76.7 million was repaid in its entirety.

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        On December 9, 2011, we paid consideration of $88.8 million to acquire a 50% equity interest in two real estate developments for which we are the construction lender. The loans primarily bear interest at 7.0% and mature in May and July 2013. At March 31, 2012 and December 31, 2011, the aggregate amount drawn on the loans was $82.3 million and $50.7 million, respectively. We consolidated these assets as of the date we acquired our equity interest and, accordingly, amounts drawn on the loans are eliminated in consolidation.

Fair Value Measurements

        We hold marketable securities that totaled $451.2 million and $417.0 million at March 31, 2012 and December 31, 2011, respectively, and are considered to have Level 1 fair value inputs. In addition, we have derivative instruments which are classified as having Level 2 inputs which consist primarily of interest rate swap agreements and foreign currency forward contracts with a gross liability balance of $8.4 million and $12.2 million at March 31, 2012 and December 31, 2011, respectively, and a gross asset value of $1.2 million and $14.9 million at March 31, 2012 and December 31, 2011, respectively. We also have interest rate cap agreements with nominal asset values.

        Level 1 fair value inputs are quoted prices for identical items in active, liquid and visible markets such as stock exchanges. Level 2 fair value inputs are observable information for similar items in active or inactive markets, and appropriately consider counterparty creditworthiness in the valuations. Level 3 fair value inputs reflect our best estimate of inputs and assumptions market participants would use in pricing an asset or liability at the measurement date. The inputs are unobservable in the market and significant to the valuation estimate.

        Note 6 includes a discussion of the fair value of debt measured using Level 1 and Level 2 inputs. Note 5 includes a discussion of the fair values recorded in purchase accounting and impairment, using Level 2 and Level 3 inputs. Level 3 inputs to our purchase accounting and impairment include our estimations of net operating results of the property, capitalization rates and discount rates.

Noncontrolling Interests and Temporary Equity

        In addition to noncontrolling redeemable interests in properties, we classify our 7.5% Cumulative Redeemable Preferred Units, or 7.5% preferred units, in temporary equity due to the possibility that we could be required to redeem the securities for cash because the redemption requires the delivery of fully registered shares of Simon Property common stock, which is not in our or Simon Property's control. The previous and current carrying amounts are equal to the liquidation value, which is the amount payable upon the occurrence of any event that could potentially result in cash settlement.

        Our evaluation of the appropriateness of classifying the units held by Simon Property and limited partners within permanent equity considered several significant factors in determining the appropriate classification of those units in the consolidated balance sheets. First, as a limited partnership, all decisions relating to our operations and distributions are made by Simon Property, acting as our sole general partner. The decisions of the general partner are made by Simon Property's Board of Directors or management. We have no other governance structure. Secondly, the sole asset of Simon Property is its interest in us. As a result, a share of Simon Property common stock (if owned by us) is best characterized as being similar to a treasury share and thus not an asset of the Operating Partnership.

        Limited partners have the right under our partnership agreement to exchange their units for shares of Simon Property common stock or cash as selected by the general partner. Accordingly, we classify limited partner units in permanent equity because Simon Property has the ability to issue shares of its common stock to limited partners exercising their exchange rights rather than using cash or other assets. Under our partnership agreement, we are required to redeem units held by Simon Property only when Simon Property has redeemed shares of its common stock. We classify units held by Simon Property in permanent equity because the decision to redeem those units would be made by Simon Property.

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        The remaining interest in a property or portfolio of properties which are redeemable at the option of the holder or in circumstances that may be outside our control, are accounted for as temporary equity within preferred units, various series, at liquidation value, and noncontrolling redeemable interests in properties in the accompanying consolidated balance sheets. The carrying amount of the noncontrolling interest is adjusted to the redemption amount assuming the instrument is redeemable at the balance sheet date. Changes in the redemption value of the underlying noncontrolling interest are recorded within accumulated deficit. There are no noncontrolling interests redeemable at amounts in excess of fair value.

        Net income attributable to noncontrolling interests (which includes nonredeemable and redeemable noncontrolling interests in consolidated properties) is a component of consolidated net income. During the three months ended March 31, 2012 and 2011, no individual components of other comprehensive income (loss) were attributable to noncontrolling interests. A rollforward of noncontrolling interests reflected in equity is as follows:

Derivative Financial Instruments

        We record all derivatives on the balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. We use a variety of derivative financial instruments in the normal course of business to selectively manage or hedge the risks associated with our indebtedness and interest payments. Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish this objective, we primarily use interest rate swaps and caps. We require that hedging derivative instruments be highly effective in reducing the risk exposure that they are designated to hedge. As a result, there was no significant ineffectiveness from any of our derivative activities during the period. We formally designate any instrument that meets these hedging criteria as a hedge at the inception of the derivative contract. We have no credit-risk-related hedging or derivative activities.

        As of March 31, 2012, we had the following outstanding interest rate derivatives related to interest rate risk:

        The carrying value of our interest rate swap agreements, at fair value, is a net liability balance of $8.4 million and $10.0 million at March 31, 2012 and December 31, 2011, respectively, and is included in other liabilities and accrued distributions. The interest rate cap agreements were of nominal value at March 31, 2012 and December 31, 2011 and we generally do not apply hedge accounting to these arrangements.

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        We are also exposed to fluctuations in foreign exchange rates on financial instruments which are denominated in foreign currencies, primarily in Japan and Europe. We use currency forward contracts and foreign currency denominated debt to manage our exposure to changes in foreign exchange rates on certain Yen and Euro-denominated receivables and net investments. Currency forward contracts involve fixing the Yen:USD or Euro:USD exchange rate for delivery of a specified amount of foreign currency on a specified date. The currency forward contracts are typically cash settled in US dollars for their fair value at or close to their settlement date. Approximately ¥5.0 billion remains as of March 31, 2012 for all forward contracts. We entered into Yen:USD forward contracts during 2010 for approximately ¥1.7 billion that we expect to receive through October 2012 and we entered into Yen:USD forward contracts during 2011 for ¥3.8 billion that we expect to receive through October 2013. In 2012, we entered into additional Yen:USD forward contracts for approximately ¥2.5 billion that we expect to receive through January 5, 2015. The March 31, 2012 net asset balance related to these forward contracts was $1.2 million which is included in deferred costs and other assets. We have reported the changes in fair value for these forward contracts in earnings. The underlying currency adjustments on the foreign currency denominated receivables are also reported in income and generally offset the amounts in earnings for these forward contracts.

        In 2011, we entered into a Euro:USD forward contract with a €141.3 million notional value which was designated as a net investment hedge. The December 31, 2011 asset balance related to this forward was $14.9 million and is included in deferred costs and other assets. We apply hedge accounting and the change in fair value for this Euro forward contract is reflected in other comprehensive income. Changes in the value of this hedge are offset by changes in the underlying hedged Euro-denominated joint venture investment. In connection with our sale of Gallerie Commerciali Italia, or GCI, as further discussed in Note 5, this hedge was terminated in January 2012.

        The total gross accumulated other comprehensive loss related to our derivative activities, including our share of the other comprehensive loss from joint venture properties, approximated $99.0 million and $115.8 million as of March 31, 2012 and December 31, 2011, respectively.

4.     Per Unit Data

        We determine basic earnings per unit based on the weighted average number of units outstanding during the period and we consider any participating securities for purposes of applying the two-class method. We determine diluted earnings per unit based on the weighted average number of units outstanding combined with the incremental weighted average units that would have been outstanding assuming all potentially dilutive common units were converted into units at the earliest date possible. The following table sets forth the computation of our basic and diluted earnings per unit.

        For the three months ended March 31, 2012, potentially dilutive securities include options to purchase shares of Simon Property common stock and units granted under our long-term incentive performance programs, or LTIP units. The only securities that had a dilutive effect for the three months ended March 31, 2012 and 2011 were stock options of Simon Property. We accrue distributions when they are declared.

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5.     Investment in Unconsolidated Entities

Real Estate Joint Ventures

        Joint ventures are common in the real estate industry. We use joint ventures to finance properties, develop new properties, and diversify our risk in a particular property or portfolio of properties. We held joint venture ownership interests in 78 properties in the United States as of March 31, 2012 and 87 properties as of December 31, 2011. At March 31, 2012, we also held interests in eight joint venture properties in Japan, two joint venture properties in South Korea, one joint venture property in Mexico, and one joint venture property in Malaysia. We account for these joint venture properties using the equity method of accounting. As discussed below, on January 9, 2012, we sold our interest in GCI which owns 45 properties located in Italy. Additionally, on March 14, 2012, we purchased a 28.7% equity stake in Klépierre.

        Certain of our joint venture properties are subject to various rights of first refusal, buy-sell provisions, put and call rights, or other sale or marketing rights for partners which are customary in real estate joint venture agreements and our industry. We and our partners in these joint ventures may initiate these provisions (subject to any applicable lock up or similar restrictions), which may result in either the sale of our interest or the use of available cash, borrowings, or units to acquire the joint venture interest from our partner.

Unconsolidated Property Transactions

        On January 6, 2012, SPG-FCM Ventures, LLC, or SPG-FCM, which holds our investment in The Mills Limited Partnership, or TMLP, distributed its interest in Del Amo Fashion Center to SPG-FCM's joint venture partners. We purchased our venture partner's 25% interest for $50.0 million, which increased our ownership in the property to 50%. As a part of the transaction, we and our venture partner each contributed $50.0 million to SPG-FCM which was used to pay down TMLP's senior loan and the loan we made to SPG-FCM, as discussed below.

        On March 22, 2012, we acquired additional interests in 26 properties previously held in TMLP, or the Mills transaction, from our joint venture partner. The transaction resulted in 16 of the properties remaining unconsolidated, the consolidation of nine previously unconsolidated properties and the purchase of the remaining noncontrolling interest in a previously consolidated property. The transaction was valued at $1.5 billion, which included repayment of the remaining $562.1 million balance on TMLP's senior loan facility, and retirement of $100.0 million of TMLP's trust preferred securities. In connection with the transaction, our $558.4 million loan to SPG-FCM was extinguished on a non-cash basis. We consolidated approximately $2.6 billion in additional property-level mortgage debt in connection with this transaction. This property-level mortgage debt was previously presented as debt of our unconsolidated entities. We and our joint venture partner had equal ownership in these properties prior to the transaction.

        The consolidation of the previously unconsolidated properties resulted in a remeasurement of our previously held interest in each of these properties to fair value and recognition of a corresponding non-cash gain of $488.7 million. In addition, we recorded an other-than-temporary impairment charge of $22.4 million for the excess of carrying value of our remaining investment in SPG-FCM over its estimated fair value. The gain on the transaction and impairment charge are included in Gain (loss) upon acquisition of controlling interests, sale or disposal of assets and interests in unconsolidated entities, and impairment charge on investment in unconsolidated entities, net in the accompanying consolidated statements of operations and comprehensive income. The assets and liabilities of the newly consolidated properties acquired in the Mills transaction have been reflected at their estimated fair value at the acquisition date, the majority of which, approximately $4.3 billion, was allocated to the investment property. This purchase price allocation is preliminary and is subject to revision within the measurement period, not to exceed one year from the date of acquisition.

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        On December 31, 2011, as discussed in Note 9, we and our joint venture partner dissolved a venture in which we had a 50% interest and distributed a portfolio of properties previously held within the venture to us and our joint venture partner.

Loan to SPG-FCM

        As discussed above, our loan to SPG-FCM was extinguished in the Mills transaction. During the three month periods ended March 31, 2012 and 2011, we recorded approximately $2.0 million and $2.5 million in interest income (net of inter-entity eliminations), related to this loan, respectively. The loan bore interest at a rate of LIBOR plus 275 basis points.

International Joint Venture Investments

        We conduct our international operations through joint venture arrangements and account for all of our international joint venture investments using the equity method of accounting.

        European Joint Ventures.    At December 31, 2011, we had a 49% ownership interest in GCI. On January 9, 2012, we sold our entire ownership interest in GCI to our venture partner, Auchan S.A. The aggregate cash we received was $375.8 million and we recognized a gain on the sale of $28.8 million. Our investment carrying value included $39.5 million of accumulated losses related to currency translation and net investment hedge accumulated balances which had been recorded in accumulated other comprehensive income (loss).

        On March 14, 2012, we acquired a 28.7% equity stake in Klépierre for approximately $2.0 billion. At March 31, 2012, the carrying value of our investment including excess investment was $2.0 billion, including all related components of accumulated other comprehensive income (loss). At March 31, 2012, we owned 54,430,000 shares of Klépierre, which had a quoted market price of $34.69 per share. We account for our investment in Klépierre under the equity method as we have determined we have significant influence over its operations. Our share of the results of Klépierre during our ownership period was immaterial.

        Asian Joint Ventures.    We conduct our international Premium Outlet operations in Japan through a joint venture with Mitsubishi Estate Co., Ltd. We have a 40% ownership interest in this joint venture. The carrying amount of our investment in this joint venture was $337.6 million and $349.5 million as of March 31, 2012 and December 31, 2011, respectively, including all related components of accumulated other comprehensive income (loss). We conduct our international Premium Outlet operations in South Korea through a joint venture with Shinsegae International Co. We have a 50% ownership interest in this joint venture. The carrying amount of our investment in this joint venture was $48.4 million and $43.8 million as of March 31, 2012 and December 31, 2011, respectively, including all related components of accumulated other comprehensive income (loss).

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Summary Financial Information

        A summary of our investments in joint ventures and share of income from our joint ventures, excluding Klépierre, follows. The statements of operations include amounts related to our investment in GCI, which was sold on January 9, 2012. In addition, we acquired additional controlling interests in The Plaza at King of Prussia and The Court at King of Prussia, or collectively, King of Prussia, on August 25, 2011 and nine properties in the Mills transaction on March 22, 2012. These previously unconsolidated properties are now consolidated properties as of the acquisition dates. Additionally, on December 31, 2011, we and our joint venture partner dissolved a venture in which we had a 50% interest and distributed a portfolio of properties previously held within the venture to us and our joint venture partner. The results of operations are classified as (loss)/income from discontinued joint venture interests in the accompanying joint venture statements of operations. Balance sheet information for the joint ventures is as follows:

        "Excess Investment" represents the unamortized difference of our investment over our share of the equity in the underlying net assets of the joint ventures acquired. We amortize excess investment over the life of the related properties, typically no greater than 40 years, and the amortization is included in the reported amount of income from unconsolidated entities.

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6.     Debt

Unsecured Debt

        At March 31, 2012, our unsecured debt consisted of $12.3 billion of senior unsecured notes, $160.0 million outstanding on an unsecured term loan, or Term Loan, and $1.9 billion outstanding under an unsecured revolving credit facility, or Credit Facility. The March 31, 2012 balance included $270.7 million (U.S. dollar equivalent) of Yen-denominated borrowings and $1.0 billion (U.S. dollar equivalent) of Euro-denominated borrowings which are designated as net investment hedges of our international investments. On March 31, 2012, we had available borrowing capacity of approximately $2.0 billion under the Credit Facility and $740.0 million of borrowing capacity under the Term Loan. The maximum outstanding balance of the Credit Facility during the three months ended March 31, 2012 was $3.1 billion and the weighted average outstanding balance on the Credit Facility was approximately $1.3 billion. Letters of credit of approximately $36.0 million were outstanding under the Credit Facility as of March 31, 2012.

        The Credit Facility provides an initial borrowing capacity of $4.0 billion which can be increased at our option to $5.0 billion during its term. The Credit Facility will initially mature on October 30, 2015 and can

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be extended for an additional year at our sole option. The base interest rate on the Credit Facility is LIBOR plus 100 basis points with an additional facility fee of 15 basis points. In addition, the Credit Facility provides for a money market competitive bid option program that allows us to hold auctions to achieve lower pricing for short-term borrowings. The Credit Facility also includes a $2.0 billion multi-currency tranche.

        On March 13, 2012, we issued $600.0 million of senior unsecured notes at a fixed interest rate of 2.15% with a maturity date of September 2017, $600.0 million of senior unsecured notes at a fixed interest rate of 3.375% with a maturity date of March 2022, and $550.0 million of senior unsecured notes at a fixed interest rate of 4.75% with a maturity date of March 2042. Proceeds from the unsecured notes offerings were used to fund a portion of the cost of the acquisition of our equity stake in Klépierre and the Mills transaction.

        During the three months ended March 31, 2012, we redeemed at par $74.2 million of senior unsecured notes with a fixed rate of 5.75%.

        On November 1, 2011, we entered into a Term Loan providing a $900.0 million borrowing capacity. The Term Loan will initially mature on July 30, 2013 and can be extended for an additional year at our sole option. The base interest rate on the Term Loan is LIBOR plus 100 basis points. We drew $160.0 million on the Term Loan in the first quarter of 2012.

Secured Debt

        Total secured indebtedness was $8.3 billion and $6.8 billion at March 31, 2012 and December 31, 2011, respectively. During the three months ended March 31, 2012, we repaid $237.8 million in mortgage loans with a weighted average interest rate of 2.36%, unencumbering six properties, and repaid our $735.0 million secured term loan.

        As a result of the acquisition of additional interests in properties in the Mills transaction in March 2012, as further discussed in Note 5, we consolidated nine properties encumbered by property-level mortgage debt totaling $2.6 billion. This property-level mortgage debt was previously presented as debt of our unconsolidated entities. We and our joint venture partner had equal ownership in these properties prior to the transaction.

Covenants

        Our unsecured debt contains financial covenants and other non-financial covenants. If we were to fail to comply with these covenants, after the expiration of the applicable cure periods, the debt maturity could be accelerated or other remedies could be sought by the lender including adjustments to the applicable interest rate. As of March 31, 2012, we are in compliance with all covenants of our unsecured debt.

        At March 31, 2012, we or our subsidiaries are the borrowers under 91 non-recourse mortgage notes secured by mortgages on 91 properties, including 8 separate pools of cross-defaulted and cross-collateralized mortgages encumbering a total of 38 properties. Under these cross-default provisions, a default under any mortgage included in the cross-defaulted pool may constitute a default under all mortgages within that pool and may lead to acceleration of the indebtedness due on each property within the pool. Certain of our secured debt contain financial and other non-financial covenants which are specific to the properties which serve as collateral for that debt. If the borrower fails to comply with these covenants, the lender could accelerate the debt and enforce its right against their collateral. At March 31, 2012, the applicable borrowers under these non-recourse mortgage notes were in compliance with all covenants where non-compliance individually, or giving effect to applicable cross-default provisions in the aggregate, could have a material adverse effect on our financial condition, results of operations or cash flows.

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Fair Value of Debt

        The carrying value of our variable-rate mortgages and other loans approximates their fair values. We estimate the fair values of consolidated fixed-rate mortgages using cash flows discounted at current borrowing rates and other indebtedness using cash flows discounted at current market rates. We estimate the fair values of consolidated fixed-rate unsecured notes using quoted market prices, or, if no quoted market prices are available, we use quoted market prices for securities with similar terms and maturities. The book value of our consolidated fixed-rate mortgages and other indebtedness was $20.0 billion and $15.9 billion as of March 31, 2012 and December 31, 2011, respectively. The fair values of these financial instruments and the related discount rate assumptions as of March 31, 2012 and December 31, 2011 are summarized as follows:

7.     Equity

        During the first three months of 2012, 11 limited partners exchanged 90,465 units for an equal number of shares of Simon Property common stock. These transactions increased Simon Property's ownership interest in us.

        On March 14, 2012, Simon Property issued 9,137,500 shares of its common stock in a public offering at a price of $137.00 per share and contributed the proceeds to us. As a result, we issued 9,137,500 units to Simon Property, and used the proceeds of $1.2 billion from the offering, net of issue costs to fund a portion of the acquisition of our equity stake in Klépierre and the Mills transaction.

Stock Based Compensation

        On March 5, 2012 and March 14, 2012, under the Simon Property Group, L.P. 1998 Stock Incentive Plan, or the Plan, the Compensation Committee of Simon Property's Board, or the Compensation Committee, awarded 12,034 restricted shares of Simon Property common stock to employees at a fair market value of $138.41 per share and $141.12 per share, respectively. The fair market value of the Simon Property restricted stock awarded on March 5, 2012 and March 14, 2012 is being recognized as expense over the three-year vesting service period. In accordance with our partnership agreement, we issued an equal number of units to Simon Property.

        On March 16, 2010, the Compensation Committee approved three long-term incentive performance programs, or the 2010 LTIP programs, for certain senior executive officers. Awards under the 2010 LTIP programs take the form of LTIP units, a form of limited partnership interest issued by us. During the performance period, participants are entitled to receive on the LTIP units awarded to them distributions equal to 10% of the regular quarterly distributions paid on a unit. As a result, we account for these LTIP units as participating securities under the two-class method of computing earnings per unit. Awarded LTIP units will be considered earned, in whole or in part, depending upon the extent to which the applicable total shareholder return, or TSR, benchmarks, as defined, are achieved during the performance period and, once earned, will become the equivalent of units after a two year service-based vesting period, beginning after the end of the performance period. Awarded LTIP units not earned are forfeited.

        The 2010 LTIP programs have one, two and three year performance periods, which end on December 31, 2010, 2011 and 2012, respectively. During July 2011, the Compensation Committee approved a three-year long-term incentive performance program, or the 2011-2013 LTIP program, and awarded LTIP units to certain senior executive officers. The 2011-2013 LTIP program has a three year

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performance period ending on December 31, 2013. During March 2012, the Compensation Committee approved a three-year long-term incentive performance program, or the 2012-2014 LTIP program, and awarded LTIP units to certain senior executive officers. The 2012-2014 LTIP program has a three year performance period ending December 31, 2014. After the end of each performance period, any earned LTIP units will then be subject to service-based vesting over a period of two years. One-half of the earned LTIP units will vest on January 1 of each of the second and third years following the end of the applicable performance period, subject to the participant maintaining employment with us through those dates.

        The 2010 LTIP program awards have an aggregate grant date fair value, adjusted for estimated forfeitures, of $7.2 million for the one-year program, $14.8 million for the two-year program and $23.0 million for the three-year program. The 2011-2013 LTIP program awards have an aggregate grant date fair value of $35.0 million, adjusted for estimated forfeitures. The 2012-2014 LTIP program awards have an aggregate grant date fair value of $35.0 million, adjusted for estimated forfeitures. Grant date fair values were estimated based upon the results of a Monte Carlo model, and the resulting expense will be recorded regardless of whether the TSR benchmarks are achieved. The grant date fair values are being amortized into expense over the period from the grant date to the date at which the awards, if any, become vested. In 2011, the Compensation Committee determined that 133,673 LTIP units were earned under the one-year 2010 LTIP program and, pursuant to the award agreements, vests in two equal installments in 2012 and 2013. In the first quarter of 2012, the Compensation Committee determined that 337,006 LTIP units were earned under the two-year 2010 LTIP program and, pursuant to the award agreements, will vest in two equal installments in 2013 and 2014.

        On July 6, 2011, in connection with the execution of an employment agreement, the Compensation Committee granted David Simon, Simon Property's Chairman and CEO, a retention award in the form of 1,000,000 LTIP units. The award vests in one-third increments on July 5^th of 2017, 2018 and 2019, subject to continued employment. The grant date fair value of the retention award was $120.3 million which is being recognized as expense over the eight-year term of his employment agreement period on a straight-line basis.

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Changes in Equity

        The following table provides a reconciliation of the beginning and ending carrying amounts of total equity, equity attributable to partners and equity attributable to noncontrolling interests:

8.     Commitments and Contingencies

Litigation

        We are involved from time-to-time in various legal proceedings that arise in the ordinary course of our business, including, but not limited to commercial disputes, environmental matters, and litigation in connection with transactions including acquisitions and divestitures. We believe that such litigation, claims and administrative proceedings will not have a material adverse impact on our financial position or our results of operations. We record a liability when a loss is considered probable and the amount can be reasonably estimated.

        In May 2010, Opry Mills sustained significant flood damage. Insurance proceeds of $50 million have been funded by the insurers and remediation work has been completed. The property was re-opened March 29, 2012. The excess insurance carriers (those providing coverage above $50 million) have denied the claim under the policy for additional proceeds (of up to $150 million) to pay further amounts for restoration costs and business interruption losses. We and our lenders are continuing our efforts through pending litigation to recover our losses under the excess insurance policies for Opry Mills and we believe recovery is probable, but no assurances can be made that our efforts to recover these funds will be successful.

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Guarantees of Indebtedness

        Joint venture debt is the liability of the joint venture and is typically secured by the joint venture property, which is non-recourse to us. As of March 31, 2012 and December 31, 2011, we had guaranteed joint venture related mortgage or other indebtedness of $113.4 million and $30.2 million, respectively. Mortgages guaranteed by us are secured by the property of the joint venture and that property could be sold in order to satisfy the outstanding obligation.

9.     Real Estate Acquisitions and Dispositions

        On March 22, 2012, as part of the Mills transaction discussed in Note 5, we acquired additional interests in 26 of our joint venture properties in a transaction valued at approximately $1.5 billion.

        On March 14, 2012, as discussed in Note 5, we acquired a 28.7% equity stake in Klépierre for approximately $2.0 billion, including the capitalization of acquisition costs.

        On January 9, 2012, as discussed in Note 5, we sold our entire ownership interest in GCI to our venture partner, Auchan S.A.

        On January 6, 2012, as discussed in Note 5, we purchased an additional 25% interest in Del Amo Fashion Center.

        During the first quarter of 2012, we sold one of our other retail properties with a carrying value of $115.0 million for nominal consideration and the assumption of the related mortgage debt of $115.0 million by the acquirer.

        On December 31, 2011, we and our joint venture partner dissolved a venture in which we had a 50% interest and distributed a portfolio of properties previously held within the venture to us and our joint venture partner. As a result, we have a 100% interest in and now consolidate the six properties we received in the distribution. The distribution resulted in a remeasurement of the distributed assets to estimated fair value and a corresponding non-cash gain of approximately $168.3 million in the fourth quarter of 2011 representing the estimated fair value of the net assets received in excess of the carrying value of our interest in the joint venture portfolio. The resulting gain and the asset and liability fair value allocation were recorded based on preliminary portfolio fair value estimates at the date of distribution and will be finalized during 2012.

        On August 25, 2011, we acquired additional controlling interests of approximately 83.75% in King of Prussia thereby increasing our ownership interest to 96.1%. The property is subject to a $160.1 million mortgage. The consolidation of this previously unconsolidated property resulted in a remeasurement of our previously held interest to fair value and a corresponding non-cash gain of $82.9 million in the third quarter of 2011.

        We expense acquisition and potential acquisition costs related to business combinations and disposition related costs as they are incurred. We incurred a minimal amount of transaction expenses during the three months ended March 31, 2012 and 2011.

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Item 2.    Management's Discussion and Analysis of Financial Condition and Results of Operations

        You should read the following discussion in conjunction with the financial statements and notes thereto included in this report.

Overview

        Simon Property Group, L.P. is a Delaware limited partnership and the majority-owned partnership subsidiary of Simon Property Group, Inc. In this discussion, the terms "Operating Partnership", "we", "us" and "our" refer to Simon Property Group, L.P. and its subsidiaries and the term "Simon Property" refers specifically to Simon Property Group, Inc. Simon Property, a Delaware corporation, is a self-administered and self-managed real estate investment trust, or REIT, under the Internal Revenue Code, as amended. According to our partnership agreement, we are required to pay all expenses of Simon Property.

        We own, develop and manage retail real estate properties, which consist primarily of regional malls, Premium Outlets®, The Mills®, and community/lifestyle centers. As of March 31, 2012, we owned or held an interest in 325 income-producing properties in the United States, which consisted of 161 regional malls, 58 Premium Outlets, 70 community/lifestyle centers, 13 properties in the Mills portfolio, and 23 other shopping centers or outlet centers in 41 states and Puerto Rico. Internationally, as of March 31, 2012, we had ownership interests in eight Premium Outlets in Japan, two Premium Outlets in South Korea, one Premium Outlet in Mexico, and one Premium Outlet in Malaysia. Additionally, on March 14, 2012, we purchased a 28.7% equity stake in Klépierre, a publicly traded, Paris-based real estate company, which owns, or has an interest in, approximately 271 shopping centers located in 13 countries in Europe.

        We generate the majority of our revenues from leases with retail tenants including:

•

base minimum rents,



•

overage and percentage rents based on tenants' sales volume, and



•

recoveries of substantially all of our recoverable expenditures, which consist of property operating, real estate taxes, repair and maintenance, and advertising and promotional expenditures.

        Revenues of our management company, after intercompany eliminations, consist primarily of management fees that are typically based upon the revenues of the property being managed.

        We invest in real estate properties to maximize total financial return which includes both operating cash flows and capital appreciation. We seek growth in earnings and cash flows by enhancing the profitability and operation of our properties and investments. We seek to accomplish this growth through the following:

•

attracting and retaining high quality tenants and utilizing economies of scale to reduce operating expenses,



•

expanding and re-tenanting existing highly productive locations at competitive rental rates,



•

selectively acquiring or increasing our interests in high quality real estate assets or portfolios of assets,



•

generating consumer traffic in our retail properties through marketing initiatives and strategic corporate alliances, and



•

selling selective non-core assets.

        We also grow by generating supplemental revenues from the following activities:

•

establishing our malls as leading market resource providers for retailers and other businesses and consumer-focused corporate alliances, including: payment systems (such as handling fees relating to

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the sales of bank-issued prepaid cards), national marketing alliances, static and digital media initiatives, business development, sponsorship, and events,

•

offering property operating services to our tenants and others, including waste handling and facility services, and the provision of energy services,



•

selling or leasing land adjacent to our shopping center properties, commonly referred to as "outlots" or "outparcels," and



•

generating interest income on cash deposits and investments in loans, including those made to related entities.

        We focus on high quality real estate across the retail real estate spectrum. We expand or renovate properties to enhance profitability and market share of existing assets when we believe the investment of our capital meets our risk-reward criteria. We selectively develop new properties in metropolitan areas that exhibit strong population and economic growth.

        We routinely review and evaluate acquisition opportunities based on their ability to complement our portfolio. Our international strategy includes partnering with established real estate companies and financing international investments with local currency to minimize foreign exchange risk.

        To support our growth, we employ a three-fold capital strategy:

•

provide the capital necessary to fund growth,



•

maintain sufficient flexibility to access capital in many forms, both public and private, and



•

manage our overall financial structure in a fashion that preserves our investment grade credit ratings.

Results Overview

        Diluted earnings per unit of limited partnership interest, or units, increased $1.57 during the first three months of 2012 to $2.18 from $0.61 for the same period last year. The increase in diluted earnings per unit was primarily attributable to:

•

improved operating performance and core business fundamentals in 2012 and the impact of our acquisition and expansion activity, and



•

a 2012 gain due to the acquisition of a controlling interest, sale or disposal of assets and interests in unconsolidated entities, and impairment charge on investment in unconsolidated entities, net of $494.8 million, or $1.39 per diluted unit, primarily driven by a gain of $488.7 million resulting from the remeasurement of our previously held interest to fair value for those properties where we now have a controlling interest.

        Core business fundamentals during the first three months of 2012 improved from the economic environment that existed during the first three months of 2011. Total sales per square foot, or psf, increased 11.2% from March 31, 2011 to $546 psf at March 31, 2012 for our portfolio of regional malls and Premium Outlets. Average base minimum rent increased 4.4% to $39.87 psf as of March 31, 2012, from $38.18 psf as of March 31, 2011. Releasing spreads remained positive as we were able to lease available square feet at higher rents than the expiring rental rates on the same space, resulting in a releasing spread (based on total tenant payments — base minimum rent plus common area maintenance) of $4.74 psf as of March 31, 2012, representing a 9.7% increase over expiring payments as of March 31, 2012. Ending occupancy was 93.6% as of March 31, 2012, as compared to 93.0% as of March 31, 2011, an increase of 60 basis points.

        Our effective overall borrowing rate at March 31, 2012 decreased 37 basis points to 5.19% as compared to 5.56% at March 31, 2011. This decrease was primarily due to a decrease in the effective

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overall borrowing rate on fixed rate debt of 42 basis points (5.62% at March 31, 2012 as compared to 6.04% at March 31, 2011) and a decrease in the effective overall borrowing rate on variable rate debt of 45 basis points (1.47% at March 31, 2012 as compared to 1.92% at March 31, 2011). At March 31, 2012, the weighted average years to maturity of our consolidated indebtedness was approximately 6.2 years as compared to approximately 5.7 years at December 31, 2011. Our financing activities for the three months ended March 31, 2012, included the repayment of $237.8 million in mortgage loans with a weighted average interest rate of 2.36% unencumbering six properties, the redemption of $74.2 million of senior unsecured notes with a fixed rate of 5.75% and the repayment of $735.0 million on a secured term loan. In addition, during the 2012 period, we issued $600.0 million of senior unsecured notes at a fixed interest rate of 2.15% with a maturity date of September 2017, $600.0 million of senior unsecured notes at a fixed interest rate of 3.375% with a maturity date of March 2022 and $550.0 million of senior unsecured notes at a fixed interest rate of 4.75% with a maturity date of March 2042. We also had net $1.0 billion (U.S. dollar equivalent) of Euro-denominated borrowings on our unsecured revolving credit facility, or Credit Facility, and $160.0 million of borrowings on our $900.0 million unsecured term loan, or Term Loan.

United States Portfolio Data

        The portfolio data discussed in this overview includes the following key operating statistics: ending occupancy, average base minimum rent per square foot, and total sales per square foot for our domestic assets. We include acquired properties in this data beginning in the year of acquisition and remove properties sold in the year disposed. For comparative purposes, we separate the information related to community/lifestyle centers and The Mills from our other U.S. operations. We also do not include any properties located outside of the United States.

        The following table sets forth these key operating statistics for:

•

properties that are consolidated in our consolidated financial statements,



•

properties we account for under the equity method of accounting as joint ventures, and



•

the foregoing two categories of properties on a total portfolio basis.

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(1)

Percentages may not recalculate due to rounding. Percentage and basis point changes are representative of the change from the comparable prior period.



(2)

Prior year data has been restated as a result of the acquisition of additional interests in certain properties as discussed in Note 5 to the condensed notes to consolidated financial statements.

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        Ending Occupancy Levels and Average Base Minimum Rent per Square Foot.    Ending occupancy is the percentage of gross leasable area, or GLA, which is leased as of the last day of the reporting period. We include all company owned space except for regional mall anchors and regional mall majors in the calculation. Base minimum rent per square foot is the average base minimum rent charge in effect for the reporting period for all tenants that would qualify to be included in ending occupancy.

        Total Sales per Square Foot.    Total sales include total reported retail tenant sales at owned GLA (for mall and freestanding stores with less than 10,000 square feet) in the regional malls and all reporting tenants at the Premium Outlets and the Mills. Retail sales at owned GLA affect revenue and profitability levels because sales determine the amount of minimum rent that can be charged, the percentage rent realized, and the recoverable expenses (common area maintenance, real estate taxes, etc.) that tenants can afford to pay.

International Property Data

        The following are selected key operating statistics for our Premium Outlets in Japan. The information used to prepare these statistics has been supplied by the managing venture partner.

Results of Operations

        In addition to the activity discussed above in the "Results Overview" section, the following acquisitions, openings, and dispositions of consolidated properties affected our consolidated results from continuing operations in the comparative periods:

•

On March 29, 2012, Opry Mills re-opened after completion of the restoration of the property following the significant flood damage which occurred in May 2010.



•

On March 22, 2012, we acquired additional interests in 26 joint venture properties, or the Mills transaction, from our joint venture partner. Of these 26 properties, nine became consolidated properties at the acquisition date.



•

During the first three months of 2012, we disposed of one other retail property.



•

During 2011, we disposed of three of our other retail properties and one of our regional malls.



•

On December 31, 2011, as discussed in Note 9 of the condensed notes to consolidated financial statements, a 50% joint venture distributed a portfolio of properties to us and our joint venture partner. We now consolidate those properties we received in the distribution.



•

On August 25, 2011, we acquired additional interests in The Plaza at King of Prussia and The Court at King of Prussia, or, collectively, King of Prussia, a 2.4 million square foot regional mall in the Philadelphia market, which had previously been accounted for under the equity method. We now have a controlling interest in this property and its results are consolidated as of the acquisition date.



•

On July 19, 2011, we acquired a 100% ownership interest in ABQ Uptown, a 222,000 square foot lifestyle center located in Albuquerque, New Mexico.



•

On June 28, 2011, we sold Prime Outlets — Jeffersonville.

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        In addition to the activities discussed above and in "Results Overview," the following acquisitions, dispositions and openings of joint venture properties affected our income from unconsolidated entities in the comparative periods:

•

As discussed above, on March 22, 2012, we acquired additional interests in 26 joint venture properties. Of these 26 assets, 16 remained unconsolidated.



•

On March 14, 2012, we acquired a 28.7% equity stake in Klépierre.



•

On January 9, 2012, we sold our entire ownership interest in Gallerie Commerciali Italia, or GCI, which owns 45 properties located in Italy to our venture partner, Auchan S.A.



•

On January 6, 2012, we acquired an additional 25% interest in Del Amo Fashion Center.



•

During 2011, we disposed of one of our regional malls.



•

On December 2, 2011, we and our partner, Genting Berhad, opened Johor Premium Outlets, a 173,000 square foot outlet center in Johor, Malaysia.



•

During the third quarter of 2011, we contributed a wholly-owned property to a joint venture which holds our interests in nine unconsolidated properties. The transaction effectively exchanged a portion of our interest in this previously wholly-owned property for increased ownership interests in the nine unconsolidated properties.



•

On March 17, 2011, we and our partner, Shinsegae International Co., opened Paju Premium Outlets, a 328,000 square foot outlet center in Paju, South Korea.

        For the purposes of the following comparison between the three months ended March 31, 2012 and 2011, the above transactions are referred to as the property transactions. In the following discussions of our results of operations, "comparable" refers to properties open and operating throughout the periods in both 2012 and 2011.

Three Months Ended March 31, 2012 vs. Three Months Ended March 31, 2011

        Minimum rents increased $57.8 million during the 2012 period, of which the property transactions accounted for $35.6 million of the increase. Comparable rents increased $22.2 million, or 3.6%. The increase in comparable rents was primarily attributable to a $22.1 million increase in base minimum rents. Overage rents increased $10.5 million, or 61.5%, as a result of an increase in tenant sales for the period compared to the prior period.

        Tenant reimbursements increased $25.0 million, due to a $17.7 million increase attributable to the property transactions and a $7.3 million, or 2.7%, increase in the comparable properties primarily due to annual increases related to common area maintenance reimbursements.

        Total other income increased $4.0 million, principally as a result of a $7.6 million increase in financing and other fee revenue earned from joint ventures net of eliminations, partially offset by a decrease in interest income of $3.9 million primarily related to a reduction in the aggregate amount of loans held for investment.

        Property operating expense increased $5.2 million primarily related to a $7.3 million increase attributable to the property transactions partially offset by a $2.1 million decrease in comparable property activity due primarily to a mild winter.

        Depreciation and amortization expense increased $18.8 million primarily due to the additional depreciable assets related to the property transactions.

        Real estate tax expense increased $5.4 million primarily related to the property transactions.

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        Repairs and maintenance expense decreased $5.2 million primarily due to decreased snow removal costs as compared to the prior period, offset partially by the property transactions.

        Home and regional office expense increased $3.8 million primarily due to increased long-term incentive compensation costs.

        General and administrative expense increased $6.2 million primarily as a result of increased performance compensation costs.

        Interest expense increased $10.0 million primarily related to the property transactions. Increased interest expense from borrowings on the Euro tranche of the Credit Facility and the issuance of unsecured notes in the fourth quarter of 2011 and the first quarter of 2012 were partially offset by the repayment of mortgages at six properties, payoff of our $735.0 million secured term loan, and payoff of $542.5 million of unsecured notes in 2011 and $74.2 million of unsecured notes in 2012.

        Income from unconsolidated properties increased $11.7 million as result of the property transactions, primarily our increased ownership in the joint venture properties acquired as part of the Mills transaction, and favorable results of operations from the portfolio of joint venture properties.

        During the first quarter of 2012, we disposed of our interest in GCI for a gain of $28.8 million and acquired a controlling interest in nine properties previously accounted for under the equity method in the Mills transaction which resulted in the recognition of a non-cash gain of $488.7 million. In addition, we recorded an other-than-temporary impairment charge of $22.4 million on our remaining investment in SPG-FCM Ventures, LLC, or SPG-FCM, which holds our investment in The Mills Limited Partnership, or TMLP, representing the excess of carrying value over the estimated fair value.

Liquidity and Capital Resources

        Because we generate revenues primarily from long-term leases, our financing strategy relies primarily on long-term fixed rate debt. We manage our floating rate debt to be at or below 15-25% of total outstanding indebtedness by negotiating interest rates for each financing or refinancing based on current market conditions and entering into floating rate to fixed rate interest rate swaps. Floating rate debt currently comprises approximately 10.3% of our total consolidated debt at March 31, 2012. We also enter into interest rate protection agreements to assist in managing our interest rate risk. We derive most of our liquidity from leases that generate positive net cash flow from operations and distributions of capital from unconsolidated entities that totaled $649.7 million during the three months ended March 31, 2012. In addition, the Credit Facility provides an alternative source of liquidity as our cash needs vary from time to time.

        Our balance of cash and cash equivalents increased $81.9 million during the first three months of 2012 to $880.5 million as of March 31, 2012 as further discussed under "Cash Flows" below.

        On March 31, 2012, we had available borrowing capacity of approximately $2.0 billion under the Credit Facility, net of outstanding borrowings of $1.9 billion and letters of credit of $36.0 million, and $740.0 million of borrowing capacity under the Term Loan. For the three months ended March 31, 2012, the maximum amount outstanding under the Credit Facility was $3.1 billion and the weighted average amount outstanding was approximately $1.3 billion. The weighted average interest rate was 1.29% for the three months ended March 31, 2012.

        We also have historically had access to long term unsecured debt markets and access to private equity from institutional investors at the property level. Simon Property also has historically had access to public equity markets.

        Our business model requires us to regularly access the debt markets to raise funds for acquisition, development and redevelopment activity, and to refinance maturing debt. Simon Property may also, from time to time, access the equity capital markets to accomplish our business objectives. We believe we have

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sufficient cash on hand and availability under the Credit Facility to address our debt maturities and capital needs through 2012.

Loan to SPG-FCM

        As discussed in Note 5 to the condensed notes to consolidated financial statements, the loan to SPG-FCM was extinguished in the Mills transaction. During the three month periods ended March 31, 2012 and 2011, we recorded approximately $2.0 million and $2.5 million in interest income (net of inter-entity eliminations), related to this loan, respectively.

Cash Flows

        Our net cash flow from operating activities and distributions of capital from unconsolidated entities for the three months ended March 31, 2012 totaled $649.7 million. In addition, we received net proceeds from our debt financing and repayment activities of $1.8 billion in 2012. These activities are further discussed below under "Financing and Debt." During the 2012 period, we also:

•

issued 9,137,500 units to Simon Property and received proceeds from the issuance of $1.2 billion, net of issue costs, in connection with Simon Property's issuance of shares of its common stock in a public offering,



•

funded the acquisition of an additional interest in one property, the 28.7% equity stake in Klépierre and additional interests in 26 joint venture properties in the Mills transaction for $3.62 billion,



•

received proceeds of $375.8 million from the sale of our interest in GCI,



•

paid unitholder distributions totaling $337.1 million,



•

paid preferred unit distributions totaling $1.3 million,



•

funded consolidated capital expenditures of $124.2 million (includes development and other costs of $42.9 million, renovation and expansion costs of $43.5 million, and tenant costs and other operational capital expenditures of $37.8 million), and



•

funded investments in unconsolidated entities of $61.7 million.

        In general, we anticipate that cash generated from operations will be sufficient to meet operating expenses, monthly debt service, recurring capital expenditures, and distributions to partners necessary to maintain Simon Property's REIT qualification on a long-term basis. In addition, we expect to be able to obtain capital for nonrecurring capital expenditures, such as acquisitions, major building renovations and expansions, as well as for scheduled principal maturities on outstanding indebtedness, from:

•

excess cash generated from operating performance and working capital reserves,



•

borrowings on the Credit Facility,



•

additional secured or unsecured debt financing, or



•

additional equity raised in the public or private markets.

        We expect to generate positive cash flow from operations in 2012, and we consider these projected cash flows in our sources and uses of cash. These cash flows are principally derived from rents paid by our retail tenants, many of whom are still recovering from the recent economic downturn. A significant deterioration in projected cash flows from operations could cause us to increase our reliance on available funds from the Credit Facility, curtail planned capital expenditures, or seek other additional sources of financing as discussed above.

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Financing and Debt

Unsecured Debt

        At March 31, 2012, our unsecured debt consisted of $12.3 billion of senior unsecured notes, $160.0 million outstanding on the Term Loan, and $1.9 billion outstanding under the Credit Facility. The March 31, 2012 balance under the Credit Facility included $270.7 million (U.S. dollar equivalent) of Yen-denominated borrowings and $1.0 billion (U.S. dollar equivalent) of Euro-denominated borrowings which are designated as net investment hedges of our international investments. On March 31, 2012, we had available borrowing capacity of approximately $2.0 billion under the Credit Facility. The maximum outstanding balance of the Credit Facility during the three months ended March 31, 2012 was $3.1 billion and the weighted average outstanding balance on the Credit Facility was approximately $1.3 billion. Letters of credit of approximately $36.0 million were outstanding under the Credit Facility as of March 31, 2012.

        The Credit Facility provides an initial borrowing capacity of $4.0 billion which can be increased at our option to $5.0 billion during its term. The Credit Facility will initially mature on October 30, 2015 and can be extended for an additional year at our sole option. The base interest rate on the Credit Facility is LIBOR plus 100 basis points with an additional facility fee of 15 basis points. In addition, the Credit Facility provides for a money market competitive bid option program that allows us to hold auctions to achieve lower pricing for short-term borrowings. The Credit Facility also includes a $2.0 billion multi-currency tranche.

        On November 1, 2011, we entered into a Term Loan providing a $900.0 million borrowing capacity. The Term Loan will initially mature on July 30, 2013 and can be extended for an additional year at our sole option. The base interest rate on the Term Loan is LIBOR plus 100 basis points. We drew $160.0 million on the Term Loan in the first quarter of 2012.

        On March 13, 2012, we issued $600.0 million of senior unsecured notes at a fixed interest rate of 2.15% with a maturity date of September 2017, $600.0 million of senior unsecured notes at a fixed interest rate of 3.375% with a maturity date of March 2022, and $550.0 million of senior unsecured notes at a fixed interest rate of 4.75% with a maturity date of March 2042. Proceeds from the unsecured notes offerings were used to fund a portion of the cost of the acquisition of our equity stake in Klépierre and the Mills transaction.

        During the three months ended March 31, 2012, we redeemed at par $74.2 million of senior unsecured notes with a fixed rate of 5.75%.

Secured Debt

        Total secured indebtedness was $8.3 billion and $6.8 billion at March 31, 2012 and December 31, 2011, respectively. During the three months ended March 31, 2012, we repaid $237.8 million in mortgage loans with a weighted average interest rate of 2.36%, unencumbering six properties, and repaid our $735.0 million secured term loan.

        As a result of the acquisition of additional interests in the joint venture properties in the Mills transaction in March 2012, as further discussed in Note 5 to the condensed consolidated notes to financial statements, we consolidated nine properties encumbered by property-level mortgage debt totaling $2.6 billion. This property-level mortgage debt was previously presented as debt of our unconsolidated entities. We and our joint venture partner had equal ownership in these properties prior to the transaction.

Covenants

        Our unsecured debt contains financial covenants and other non-financial covenants. If we were to fail to comply with these covenants, after the expiration of the applicable cure periods, the debt maturity could

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be accelerated or other remedies could be sought by the lender including adjustments to the applicable interest rate. As of March 31, 2012, we are in compliance with all covenants of our unsecured debt.

        At March 31, 2012, we or our subsidiaries are the borrowers under 91 non-recourse mortgage notes secured by mortgages on 91 properties, including 8 separate pools of cross-defaulted and cross-collateralized mortgages encumbering a total of 38 properties. Under these cross-default provisions, a default under any mortgage included in the cross-defaulted pool may constitute a default under all mortgages within that pool and may lead to acceleration of the indebtedness due on each property within the pool. Certain of our secured debt contain financial and other non-financial covenants which are specific to the properties which serve as collateral for that debt. If the borrower fails to comply with these covenants, the lender could accelerate the debt and enforce its right against their collateral. At March 31, 2012, the applicable borrowers under these non-recourse mortgage notes were in compliance with all covenants where non-compliance could individually, or giving effect to applicable cross-default provisions, have a material adverse effect on our financial condition, results of operations or cash flows.

Summary of Financing

        Our consolidated debt, adjusted to reflect outstanding derivative instruments, and the effective weighted average interest rates as of March 31, 2012 and December 31, 2011, consisted of the following (dollars in thousands):

        As of March 31, 2012, we had $485.2 million of notional amount fixed rate swap agreements that have a weighted average fixed pay rate of 2.52% and a weighted average variable receive rate of 0.61%. As of March 31, 2012, the net effect of these agreements effectively converted $485.0 million of variable rate debt to fixed rate debt.

Contractual Obligations and Off-Balance Sheet Arrangements

        There have been no material changes to our outstanding capital expenditure and lease commitments previously disclosed in our 2011 Annual Report on Form 10-K.

        In regards to long-term debt arrangements, the following table summarizes the material aspects of these future obligations on our consolidated indebtedness as of March 31, 2012, for the remainder of 2012 and subsequent years thereafter (dollars in thousands) assuming the obligations remain outstanding through initial maturities:

        Our off-balance sheet arrangements consist primarily of our investments in joint ventures which are common in the real estate industry and are described in Note 5 of the condensed notes to consolidated

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financial statements. Our joint ventures typically fund their cash needs through secured debt financings obtained by and in the name of the joint venture entity. The joint venture debt is secured by a first mortgage, is without recourse to the joint venture partners, and does not represent a liability of the partners, except to the extent the partners or their affiliates expressly guarantee the joint venture debt. As of March 31, 2012, we had guaranteed $113.4 million of joint venture related mortgage or other indebtedness. We may elect to fund cash needs of a joint venture through equity contributions (generally on a basis proportionate to our ownership interests), advances or partner loans, although such fundings are not required contractually or otherwise.

Acquisitions and Dispositions

        Buy-sell provisions are common in real estate partnership agreements. Most of our partners are institutional investors who have a history of direct investment in retail real estate. We and our partners in our joint venture properties may initiate these provisions (subject to any applicable lock up or similar restrictions). If we determine it is in our partners' best interests for us to purchase the joint venture interest and we believe we have adequate liquidity to execute the purchase without hindering our cash flows, then we may initiate these provisions or elect to buy. If we decide to sell any of our joint venture interests, we expect to use the net proceeds to reduce outstanding indebtedness or to reinvest in development, redevelopment, or expansion opportunities.

        Acquisitions.    On March 22, 2012, we acquired additional interests in 26 properties previously held in TMLP, from our joint venture partner. The transaction resulted in 16 of the properties remaining unconsolidated, the consolidation of nine previously unconsolidated properties and the purchase of the remaining noncontrolling interest in a previously consolidated property. The transaction was valued at $1.5 billion, which included repayment of the remaining $562.1 million balance on TMLP's senior loan facility and retirement of $100.0 million of TMLP's trust preferred securities. In connection with the transaction, our $558.4 million loan to SPG-FCM was extinguished on a non-cash basis. We consolidated approximately $2.6 billion in additional property-level mortgage debt in connection with this transaction. The transaction resulted in a remeasurement of our previously held interest in each of these properties to fair value and the recognition of a corresponding non-cash gain of approximately $488.7 million.

        On March 14, 2012, we acquired a 28.7% equity stake in Klépierre for approximately $2.0 billion.

        On January 6, 2012, SPG-FCM, which holds our investment in TMLP, distributed its interest in Del Amo Fashion Center to SPG-FCM's joint venture partners. We purchased our venture partner's 25% interest for $50.0 million, which increased our ownership in the property to 50%. As a part of the transaction, we and our venture partner each contributed $50.0 million to SPG-FCM which was used to pay down TMLP's senior loan and the loan we made to SPG-FCM, as discussed below.

        On December 31, 2011, we and our joint venture partner dissolved a venture in which we had a 50% interest and distributed a portfolio of properties previously held within the venture to us and our joint venture partner. As a result, we have a 100% interest and now consolidate the six properties we received in the distribution. The distribution resulted in a remeasurement of the distributed assets to estimated fair value and a corresponding non-cash gain of approximately $168.3 million in the fourth quarter of 2011 representing the estimated fair value of the assets received in excess of the carrying value of our interest in the joint venture portfolio.

        On August 25, 2011, we acquired additional controlling interests of approximately 83.75% in King of Prussia, thereby increasing our ownership interest to 96.1%. The property is subject to a $160.1 million mortgage. The consolidation of this previously unconsolidated property resulted in a remeasurement of our previously held interest to fair value and a corresponding non-cash gain of $82.9 million in the third quarter of 2011.

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        Dispositions.    We continue to pursue the disposition of properties that no longer meet our strategic criteria or that are not a primary retail venue within their trade area.

        During the first quarter of 2012, we sold one of our other retail properties with a carrying value of $115.0 million for nominal consideration and the assumption of the related mortgage debt of $115.0 million by the acquirer.

        On January 9, 2012, we sold our entire ownership interest in GCI to our venture partner, Auchan S.A. The aggregate cash we received was $375.8 million and we recognized a gain on the sale of $28.8 million.

Development Activity

        New Domestic Development.    In March 2012, we began construction on Phoenix Premium Outlets located in Phoenix, Arizona. This new center, which is wholly owned by us, is expected to open in May of 2013. The estimated cost of this project is $70.7 million.

        In August 2011, we began construction on Tanger Outlets — Galveston located in Texas City, Texas. This new center is a joint venture with Tanger Factory Outlets Centers, Inc. in which we have a 50% interest. Our estimated share of the cost of this project is $32.2 million.

        During 2010, we began construction on Merrimack Premium Outlets located in Merrimack, New Hampshire. This new Premium Outlet, which is wholly owned by us, is scheduled to open on June 14, 2012. The estimated cost of this project is $144.1 million, and the carrying amount of the construction in progress as of March 31, 2012 was $113.6 million.

        Other than these projects, our share of other 2012 new developments is not significant.

        Domestic Expansions and Renovations.    We routinely incur costs related to construction for significant renovation and expansion projects at our properties. We also have reinstituted our redevelopment and expansion initiatives which we previously reduced given the downturn in the economy. Renovation and expansion projects are currently underway at 23 centers in the U.S. and more than 50 anchor and big box tenants are currently scheduled to open in 2012 and 2013. We expect our share of development costs for 2012 related to renovation or expansion initiatives to be approximately $800.0 million compared to approximately $265.0 million in 2011.

        We expect to fund these capital projects with cash flows from operations. Our estimated stabilized return on invested capital ranges between 8-12% for all of our new development, expansion and renovation projects.

        International Development Activity.    We typically reinvest net cash flow from our international joint ventures to fund future international development activity. We believe this strategy mitigates some of the risk of our initial investment and our exposure to changes in foreign currencies. We have also funded most of our foreign investments with local currency-denominated borrowings that act as a natural hedge against fluctuations in exchange rates. Currently, our consolidated net income exposure to changes in the volatility of the Euro, Yen, Won, and other foreign currencies is not material. We expect our share of international development costs for 2012 will be approximately $130.0 million at current FX rates, primarily funded through reinvested joint venture cash flow and construction loans.

        Rinku Premium Outlets Phase IV, a 103,000 square foot expansion to the Rinku Premium Outlet located in Osaka, Japan, is under construction and is expected to open in July 2012. Kobe-Sanda Premium Outlets Phase III, a 78,000 square foot expansion to the Kobe-Sanda Premium Outlets in Osaka, Japan, is under construction and is expected to open in December 2012. The net cost of these projects is expected to be JPY 6.2 billion, of which our share is approximately JPY 2.5 billion, or $30.1 million based on applicable YEN:USD exchange rates.

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        In April 2012, construction began on Shisui Premium Outlets, a 234,000 square foot new development in Chiba, Japan, which is due to open in April 2013. The net cost of this project is expected to be JPY 9.2 billion, of which our share is approximately JPY 3.7 billion, or $44.4 million based on applicable YEN:USD exchange rates.

        In April 2012, construction began on Toronto Premium Outlets, a 358,000 square foot new development in Ontario, Canada, which is expected to open in August 2013. The net cost of this project is expected to be CAD 159.6 million, of which our share is approximately CAD 79.8 million, or $79.8 million based on applicable CAD:USD exchange rates.

        In 2012, construction began on Busan Premium Outlets, a 243,500 square foot new development in Busan, South Korea, which is due to open in September 2013. The net cost of this project is expected to be KRW 129.2 billion, of which our share is approximately KRW 64.6 billion, or $57 million based on applicable KRW:USD exchange rates.

        On March 1, 2012, we and our partner, Bailian Group, the largest retail conglomerate in China, announced the signing of a Memorandum of Understanding, or MOU, to jointly develop a Premium Outlet Center in Pudong, Shanghai, China. The MOU also provides the joint venture the opportunity to develop additional Premium Outlet Centers in mainland China.

        On April 9, 2012, we and our partner, BR Malls Participacoes S.A., signed a Joint Venture Agreement to develop and own Premium Outlet Centers in Brazil in which we would have a 50% interest. The first Premium Outlet is expected to be opened in the State of Sao Paulo in 2013.

Distributions

        We paid a distribution of $0.95 per unit in the first quarter of 2012 and we will pay a distribution of $1.00 per unit in the second quarter. Our distributions typically exceed our net income generated in any given year primarily because of depreciation, which is a non-cash expense. Our future distributions will be determined by Simon Property's Board of Directors based on actual results of operations, cash available for distributions, cash reserves as deemed necessary for capital and operating expenditures, and the amount required to maintain Simon Property's status as a REIT.

Forward-Looking Statements

        Certain statements made in this section or elsewhere in this report 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 our actual results may differ materially from those indicated by these forward-looking statements due to a variety of risks and uncertainties. Such factors include, but are not limited to: our ability to meet debt service requirements, the availability 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 and expansion 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, intensely competitive market environment in the retail industry, 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 Simon Property's status as a real estate investment trust. We discussed these and other risks and uncertainties under the heading "Risk Factors" in our most recent Annual Report on Form 10-K. We may update that discussion in our Quarterly Reports on Form 10-Q, but otherwise we undertake no duty or

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obligation to update or revise these forward-looking statements, whether as a result of new information, future developments, or otherwise.

Item 3.    Qualitative and Quantitative Disclosures About Market Risk

        Sensitivity Analysis.    We disclosed a comprehensive qualitative and quantitative analysis regarding market risk in the Management's Discussion and Analysis of Financial Condition and Results of Operations included in our 2011 Annual Report on Form 10-K. There have been no material changes in the assumptions used or results obtained regarding market risk since December 31, 2011.

Item 4.    Controls and Procedures

        Evaluation of Disclosure Controls and Procedures.    We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) under the Securities Exchange Act of 1934 (the "Exchange Act")) that are designed to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms, and that such information is accumulated and communicated to Simon Property's management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosures. Because of inherent limitations, disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable, and not absolute, assurance that the objectives of disclosure controls and procedures are met.

        Simon Property's management, with the participation of the Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that, as of the end of the period covered by this report, our disclosure controls and procedures are effective at a reasonable assurance level.

        Changes in Internal Control Over Financial Reporting.    There have not been any changes in our internal control over financial reporting (as defined in Rule 13a-15(f)) that occurred during the quarter ended March 31, 2012 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II — Other Information

        

Item 1.    Legal Proceedings

        We are involved from time-to-time in various legal proceedings that arise in the ordinary course of our business, including, but not limited to commercial disputes, environmental matters, and litigation in connection with transactions including acquisitions and divestitures. We believe that such litigation, claims and administrative proceedings will not have a material adverse impact on our financial position or our results of operations. We record a liability when a loss is considered probable and the amount can be reasonably estimated.

Item 1A.    Risk Factors

        Through the period covered by this report, there were no significant changes to the Risk Factors disclosed in "Part 1: Business" of our 2011 Annual Report on Form 10-K.

Item 5.    Other Information

        During the quarter covered by this report, the Audit Committee of Simon Property Group, Inc.'s Board of Directors approved certain audit-related, tax compliance and tax consulting to be provided by Ernst & Young, LLP, our independent registered public accounting firm. This disclosure is made pursuant to Section 10A(i)(2) of the Securities Exchange Act of 1934, as added by Section 202 of the Sarbanes-Oxley Act of 2002.

Item 6.    Exhibits

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Represents a management contract, or compensatory plan, contract or arrangement required to be filed pursuant to Regulation S-K.

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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.

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EXHIBIT 10.2

CERTIFICATE OF DESIGNATION
OF
SERIES 2012 LTIP UNITS
OF
SIMON PROPERTY GROUP, L.P.

        WHEREAS, Simon Property Group, L.P. (the "Partnership"), is authorized to issue LTIP Units to executives of Simon Property Group, Inc., the General Partner of the Partnership (the "General Partner"), pursuant to Section 9.3(a) of the Eighth Amended and Restated Limited Partnership Agreement of the Partnership (the "Partnership Agreement").

        WHEREAS, the General Partner has determined that it is in the best interests of the Partnership to designate a series of LTIP units that are subject to the provisions of this Designation and the related Award Agreement (as defined below); and

        WHEREAS, Sections 7.3 and 9.3(c) of the Partnership Agreement authorize the General Partner, without the approval of the Limited Partners, to set forth in an LTIP Unit Designation (as defined in the Partnership Agreement) the performance conditions and economic rights including distribution and conversion rights of each class or series of LTIP Units.

        NOW, THEREFORE, the General Partner hereby designates the powers, preferences, economic rights and performance conditions of the Series 2012 LTIP Units.

ARTICLE I
Definitions

        1.1    Definitions Applicable to LTIP Units.    Except as otherwise expressly provided herein, each capitalized term shall have the meaning ascribed to it in the Partnership Agreement. In addition, as used herein:

        "Adjustment Events" has the meaning provided in Section 2.2 hereof.

        "Award Agreement" means the Series 2012 LTIP Unit Award Agreement approved by the Compensation Committee of the Board of Directors of the General Partner and entered into with the holder of the number of Award LTIP Units specified therein.

        "Award Date" means March 5, 2012.

        "Award LTIP Units" means the number of LTIP Units issued pursuant to an Award Agreement and does not include the Earned LTIP Units or Vested LTIP Units that the Award LTIP Units may become.

        "Conversion Date" has the meaning provided in Section 4.3 hereof.

        "Conversion Notice" has the meaning provided in Section 4.3 hereof.

        "Earned LTIP Units" means the number of Award LTIP Units that are determined by the Committee to have been earned pursuant to an Award Agreement.

        "Economic Capital Account Balance" means, with respect to a holder of LTIP Units, (i) his Capital Account balance, plus the amount of his share of any Partner Minimum Gain or Partnership Minimum Gain, in either case to the extent attributable to his ownership of LTIP Units, divided by (ii) the number of LTIP Units held by such holder.

        "Full Conversion Date" means with respect to a holder of the LTIP Units, the date on which the Economic Capital Account Balance of such holder first equals or exceeds the Target Balance.

        "Liquidating Gain" means one hundred percent (100%) of the Profits of the Partnership realized from a transaction or series of transactions that constitute a sale of substantially all of the assets of the

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Partnership and one hundred percent (100%) of the Profits realized from a restatement of the Partnership's Capital Accounts in accordance with Treas. Reg. §1.704-1(b)(2)(iv)(f).

        "LTIP Units" means the Series 2012 LTIP Units created by this Designation.

        "LTIP Unitholder" means a person that holds LTIP Units.

        "Other LTIP Units" means "LTIP Units" (as defined in the Partnership Agreement) other than the Series 2012 LTIP Units designated hereby.

        "Partnership Unit Economic Balance" shall mean (i) the Capital Account balance of the General Partner plus the amount of the General Partner's share of any Partner Minimum Gain or Partnership Minimum Gain, in each case to the extent attributable to the General Partner's Partnership Units divided by (ii) the number of the General Partner's Partnership Units.

        "Partnership Units" or "Units" has the meaning set forth in the Partnership Agreement.

        "Special Distributions" means distributions designated as a capital gain dividend within the meaning of Section 875(b)(3)(C) of the Code and any other distribution that the General Partner determines is not made in the ordinary course.

        "Target Balance" means (i) $138.41, which is equal to the Partnership Unit Economic Balance as of the Award Date as determined after Capital Accounts have been adjusted in accordance with Treas. Reg. §1.704-1(b)(2)(iv)(f), reduced by (ii) the amount of Special Distributions per Partnership Unit attributable to the sale of assets subsequent to the Award Date, to the extent that such Special Distributions are not made with respect to the LTIP Units.

        "Vested LTIP Units" means Earned LTIP Units that have satisfied the time-based vesting requirements of an Award Agreement.

        1.2    Definitions Applicable to Other LTIP Units.    In determining the rights of the holder of the LTIP Units vis-à-vis the holders of Other LTIP Units, the foregoing definitions shall apply to the Other LTIP Units except as expressly provided otherwise in a Certificate of Designation applicable to such Other LTIP Units.

ARTICLE II
Economic Terms and Voting Rights

        2.1    Designation and Issuance.    The General Partner hereby designates a series of LTIP Units entitled the Series 2012 LTIP Units. The number of Series 2012 LTIP Units that may be issued pursuant to this Designation is the total number of Award LTIP Units issued on the Award Date. The holders of Award LTIP Units shall be deemed admitted as a Limited Partner of the Partnership on the Award Date.

        2.2    Unit Equivalence.    Except as otherwise provided in this Designation, the Partnership shall maintain, at all times, a one-to-one correspondence between the LTIP Units and Partnership Units, for conversion, distribution and other purposes, including without limitation complying with the following procedures. If an Adjustment Event (as defined below) occurs, then the General Partner shall make a corresponding adjustment to the LTIP Units to maintain a one-to-one conversion and economic equivalence ratio between the LTIP Units and the Partnership Units. The following shall be "Adjustment Events": (A) the Partnership makes a distribution of Partnership Units or other equity interests in the Partnership on all outstanding Partnership Units (provided that with respect to Award LTIP Units any adjustment as the result of a distribution made concurrently with a stock dividend paid by the General Partner in accordance with Rev. Proc. 2010-12 or any similar policy or pronouncement of the Internal Revenue Service shall be made only to the extent that the Award LTIP Units do not receive ten percent (10%) of the distribution), (B) the Partnership subdivides the outstanding Partnership Units into a greater number of units or combines the outstanding Partnership Units into a small number of units, or (C) the

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Partnership issues any Partnership Units or other equity in the Partnership in exchange for its outstanding Partnership Units by way of a reclassification or recapitalization of its Partnership Units. If more than one Adjustment Event occurs, the adjustment to the LTIP Units need be made only once using a single formula that takes into account each and every Adjustment Event as if all Adjustment Events occurred simultaneously. For the avoidance of doubt, the following shall not be Adjustment Events: (x) the issuance of Partnership Units from the Partnership's sale of securities or in a financing, reorganization, acquisition or other business transaction, (y) the issuance of Partnership Units or Other LTIP Units pursuant to any employee benefit or compensation plan or distribution reinvestment plan, or (z) the issuance of any Partnership Units to the General Partner in respect of a capital contribution to the Partnership of proceeds from the sale of securities by the General Partner. If the Partnership takes an action affecting the Partnership Units other than actions specifically described above as constituting Adjustment Events and, in the opinion of the General Partner, such action would require an adjustment to the LTIP Units to maintain the one-to-one correspondence described above, the General Partner shall have the right to make such adjustment to the LTIP Units, to the extent permitted by law, in such manner and at such time as the General Partner, in its sole discretion, may determine to be appropriate under the circumstances. If an adjustment is made to the LTIP Units as hereby provided, the Partnership shall promptly file in the books and records of the Partnership a certificate setting forth such adjustment and a brief statement of facts requiring such adjustment, which certificate shall be conclusive evidence of the correctness of such adjustment absent manifest error. Promptly after filing such certificate, the Partnership shall mail a notice to each LTIP Unitholder setting forth the adjustment to his or her LTIP Units and the effective date of such adjustment.

        2.3    Distributions of Net Operating Cash Flow.    Award LTIP Units shall be treated as one-tenth of a Partnership Unit for purposes of Sections 6.2(a) and (b)(iii) of the Partnership Agreement, except that Award LTIP Units shall not be entitled to any Special Distributions except as provided in Section 2.4. Distributions with respect to an Award LTIP Unit issued during a fiscal quarter shall be prorated as provided in Section 6.2(c)(ii) of the Partnership Agreement. Earned LTIP Units shall be entitled to the same rights to receive distributions as the Partnership Units.

        2.4    Special Distributions.    Until the Economic Capital Account Balance of a holder's LTIP Units is equal to the Target Balance, such holder shall be entitled to Special Distributions attributable to the sale of an asset of the Partnership only to the extent the Partnership determines that such asset has appreciated in value subsequent to the Award Date.

        2.5    Liquidating Distributions.    In the event of the dissolution, liquidation and winding up of the Partnership, distributions to holders of LTIP Units shall be made in accordance with Section 8.2(d) of the Partnership Agreement.

        2.6    Forfeiture.    Any Award LTIP Units and Earned LTIP Units that are forfeited pursuant to the terms of an Award Agreement shall immediately be null and void and shall cease to be outstanding or to have any rights except as otherwise provided in the Award Agreement.

        2.7    Voting Rights.    Holders of Award LTIP Units and Earned LTIP Units shall not be entitled to vote on any other matter submitted to the Limited Partners for their approval unless and until such units constitute Vested LTIP Units. Vested LTIP Units will be entitled to be voted on an equal basis with the Partnership Units.

ARTICLE III

Tax Provisions

        3.1    Special Allocations of Profits.    Liquidating Gain shall be allocated as follows: (a) first, to the holders of Preferred Units as provided in the Partnership Agreement, (b) second, if applicable, to the holders of Partnership Units as provided in by the Partnership Agreement until the Partnership Unit Economic Balance is equal to the Target Balance and (c) third, to (i) the holders of the LTIP Units until

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their Economic Capital Account Balance is equal to the Target Balance and (ii) the holders of Other LTIP Units until their economic capital account balances are equal to their target balances. If an allocation of Liquidating Gain is not sufficient to achieve the objectives of the foregoing sentence in full, Liquidating Gain, after giving effect to clauses (a) and (b) in such sentence, shall be allocated first, to the holders of the Vested LTIP Units and vested Other LTIP Units and, second, to the holders of Unvested LTIP Units and non-vested Other LTIP Units, in each case, in proportion to the amounts necessary for such units to achieve the objectives of the foregoing sentence; provided, that the holders of Other LTIP Units shall not receive an allocation of Liquidating Gain that they are not entitled to receive under the applicable certificate of designation. A certificate of designation for Other LTIP Units may provide for a different allocation among such Other LTIP Units, but such different allocation shall not affect the amount allocated to the LTIP Units vis-à-vis the Other LTIP Units. Notwithstanding the foregoing, Liquidating Gain shall not be allocated to the holders of the LTIP Units to the extent such allocation would cause the LTIP Units to fail to qualify as a "profits interest" when granted. Once the Economic Capital Account Balance has been increased to the Target Balance, no further allocations shall be made pursuant to this Section 3.1. Thereafter, LTIP Units shall be treated as Partnership Units with respect to the allocation of Profits and Losses pursuant to Section 3.2.

        If any Unvested LTIP Units to which gain has been previously allocated under this Section are forfeited, the Capital Account associated with the forfeited Unvested LTIP Units will be reallocated to the remaining LTIP Units at the time of forfeiture to the extent necessary to cause the Economic Capital Account Balance of such remaining LTIP Units to equal the Target Balance. To the extent any gain is not reallocated in accordance with the foregoing sentence, such gain shall be forfeited.

        3.2    Allocations with Respect to Award LTIP Units.    The following provisions apply to allocation of Profits and Losses with respect to Award LTIP Units:

        (a)   Except to the extent to which a holder of the LTIP Units is entitled to a Distribution pursuant to Section 2.4, no Profits that the General Partner determines are attributable to a Special Distribution or the sale of an asset shall be allocated to Award LTIP Units.

        (b)   Except as provided in Section 3.2(a), each Award LTIP Unit shall be treated as one-tenth of a Partnership Unit for purposes of allocation of Profits and Losses pursuant to Section 6.1(b)(3) of the Partnership Agreement.

        3.3    Allocations with Respect to Earned LTIP Units.    Earned LTIP Units shall be treated as Partnership Units with respect to the allocation of Profits and Losses; provided, that Profits from the sale of assets shall be allocated to each holder of the LTIP Units as provided in Section 3.1 until his Economic Capital Account Balance has been increased to the Target Balance.

        3.4    Safe Harbor Election.    To the extent provided for in Regulations, revenue rulings, revenue procedures and/or other IRS guidance issued after the date of this Designation, the Partnership is hereby authorized to, and at the direction of the General Partner shall, elect a safe harbor under which the fair market value of any LTIP Units issued after the effective date of such Regulations (or other guidance) will be treated as equal to the liquidation value of such LTIP Units (i.e., a value equal to the total amount that would be distributed with respect to such interests if the Partnership sold all of its assets for the fair market value immediately after the issuance of such LTIP Units, satisfied its liabilities (excluding any non-recourse liabilities to the extent the balance of such liabilities exceed the fair market value of the assets that secure them) and distributed the net proceeds to the LTIP Unitholders under the terms of this Agreement). In the event that the Partnership makes a safe harbor election as described in the preceding sentence, each LTIP Unitholder hereby agrees to comply with all safe harbor requirements with respect to transfers of such LTIP Units while the safe harbor election remains effective. In addition, upon a forfeiture of any LTIP Units by any LTIP Unitholder, gross items of income, gain, loss or deduction shall be allocated to such LTIP Unitholder if and to the extent required by final Regulations promulgated after the effective

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date of this Designation to ensure that allocations made with respect to all unvested LTIP Units are recognized under Code Section 704(b).

ARTICLE IV
Conversion

        4.1    Conversion Right.    On and after the Full Conversion Date, the holder shall have the right to convert Vested LTIP Units to Partnership Units on a one-to-one basis by giving notice to the Partnership as provided in Section 4.3 hereof. Prior to the Full Conversion Date, the conversion of Vested LTIP Units shall be subject to the limitation set forth in Section 4.2.

        4.2    Limitation on Conversion Rights Until the Full Conversion Date.    The maximum number of Vested LTIP Units that may be converted prior to the Full Conversion Date is equal to the product of (a) the result obtained by dividing (1) the Economic Capital Account Balance of the Vested LTIP Units by (2) the Target Balance of the Vested LTIP Units, in each case determined as of the effective date of the conversion and (b) the number of Vested LTIP Units. Immediately after each conversion of Vested LTIP Units, the aggregate Economic Capital Account Balance of the remaining Vested LTIP Units shall be equal to (a) the aggregate Economic Capital Account Balance of all of the holder's Vested LTIP Units immediately prior to conversion, minus (b) the aggregate Economic Capital Account Balance immediately prior to conversion of the number of the holder's Vested LTIP Units that were converted.

        4.3    Exercise of Conversion Right.    In order to exercise the right to convert a Vested LTIP Unit, the holder shall give notice (a "Conversion Notice") in the form attached hereto as Exhibit A to the General Partner not less than sixty (60) days prior to the date specified in the Conversion Notice as the effective date of the conversion (the "Conversion Date"). The conversion shall be effective as of 12:01 a.m. on the Conversion Date without any action on the part of the holder or the Partnership. The holder may give a Conversion Notice with respect to Unvested LTIP Units, provided that such Unvested LTIP Units become Vested LTIP Units on or prior to the Conversion Date.

        4.4    Exchange for Shares.    An LTIP Unitholder may also exercise his right to exchange the Partnership Units to be received pursuant to the Conversion Notice to Shares or cash, as selected by the General Partner, in accordance with Article XI of the Partnership Agreement; provided, however, such right shall be subject to the terms and conditions of Article II of the Partnership Agreement and may not be effective until six (6) months from the date the Vested LTIP Units that were converted into Partnership Units became fully vested.

        4.5    Forced Conversion.    In addition, the General Partner may, upon not less than ten (10) days' notice to an LTIP Unitholder, require any holder of Vested LTIP Units to convert them into Units subject to the limitation set forth in Section 4.2, and only if, at the time the General Partner acts, there is a one-to-one conversion right between the LTIP Units and Partnership Units for conversion, distribution and all other purposes. The conversion shall be effective as of 12:01 a.m. on the date specified in the notice from the General Partner.

        4.6    Notices.    Notices pursuant to this Article shall be given in the same manner as notices given pursuant to the Partnership Agreement.

[Remainder of page left intentionally blank]

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EXHIBIT A

Conversion Notice

        The undersigned hereby gives notice pursuant to Section 4.3 of the Certificate of Designation of Series 2012 LTIP Units of Simon Property Group, L.P. (the "Designation") that he elects to convert                          Vested LTIP Units (as defined in the Designation) into an equivalent number of Partnership Units (as defined in the Eighth Amended and Restated Limited Partnership Agreement of Simon Property Group, L.P. (the "Partnership Agreement")). The conversion is to be effective on                                     , 20        .

        IN WITNESS WHEREOF, this Conversion Notice is given this              day of                                     , 20        , to Simon Property Group, Inc. in accordance with Section 12.2 of the Partnership Agreement.

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EXHIBIT 10.2

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EXHIBIT 31.1

CERTIFICATION 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

I, David Simon, certify that:

1.

I have reviewed this quarterly report on Form 10-Q of Simon Property Group, L.P.;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.

The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act rules 13a-15(f) and 15d-15(f) for the registrant and have:

(a)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)

Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.

The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

(a)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

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EXHIBIT 31.1

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EXHIBIT 31.2

CERTIFICATION 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

I, Stephen E. Sterrett, certify that:

1.

I have reviewed this quarterly report on Form 10-Q of Simon Property Group, L.P.;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.

The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act rules 13a-15(f) and 15d-15(f) for the registrant and have:

(a)

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)

Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)

Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)

Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.

The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent functions):

(a)

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)

Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

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EXHIBIT 31.2

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EXHIBIT 32

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

        In connection with the Quarterly Report of Simon Property Group, L.P. (the "Company") on Form 10-Q for the period ending March 31, 2012 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), each of the undersigned certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)

The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2)

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

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EXHIBIT 32