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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 June 30, 2010

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

Delaware
(State of incorporation or organization)

333-157794
(Commission File No.)

34-175576
(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 o    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 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 June 30, 2010, we owned or held an interest in 318 income-producing properties in the United States, which consisted of 161 regional malls, 42 Premium Outlets, 66 community/lifestyle centers, 36 properties acquired in the 2007 acquisition of The Mills Corporation, or the Mills acquisition, and 13 other shopping centers or outlet centers in 41 states and Puerto Rico. Of the 36 properties acquired in the Mills portfolio, 16 of these properties are The Mills, 16 are regional malls, and four are community centers. Internationally, as of June 30, 2010, we had ownership interests in 52 European shopping centers (France, Italy and Poland), eight Premium Outlets in Japan, one Premium Outlet in Mexico, and one Premium Outlet in South Korea. On July 15, 2010, as discussed in Note 11, we and our joint venture partner sold our collective interests in Simon Ivanhoe S.à.r.l., or Simon Ivanhoe, which owned seven shopping centers located in France and Poland. We have also entered into a definitive agreement to acquire a portfolio of 21 outlet shopping centers as described in Note 9.

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 June 30, 2010 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 2009 Annual Report on Form 10-K.

        As of June 30, 2010, we consolidated 198 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 164 properties, or the joint venture properties, using the equity method of accounting. We manage the day-to-day operations of 93 of the 164 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 Europe, Japan, Mexico, and Korea comprise 62 of the remaining 71 properties. The international properties are managed locally by joint ventures in which we share oversight responsibility with our partner. Additionally, we account for our investment in SPG-FCM Ventures, LLC, or SPG-FCM, which acquired The Mills Corporation and its wholly-owned subsidiary, The Mills Limited Partnership, collectively Mills, in April 2007, using the equity

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method of accounting. We have determined that SPG-FCM is not a variable interest entity (VIE) and that Farallon Capital Management, L.L.C., or Farallon, our joint venture partner, has substantive participating rights with respect to the assets and operations of SPG-FCM pursuant to the applicable partnership agreements.

        We allocate net operating results after preferred distributions based on 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. Simon Property's weighted average ownership interest in us was 83.3% and 81.6% for the six months ended June 30, 2010 and 2009, respectively. As of June 30, 2010 and December 31, 2009, Simon Property's ownership interest in us was 83.3% and 83.2%, respectively. We adjust the 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 cash flows represent distributions on outstanding preferred units at the time of declaration of partnership interests held by limited partners.

Reclassifications

        We made certain reclassifications of prior period amounts in the consolidated financial statements to conform to the 2010 presentation. These reclassifications had no impact on previously reported net income available to common 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 markets. Our gift card programs are administered by banks. We collect gift card funds at the point of sale and then remit those funds to the banks for further processing. As a result, cash and cash equivalents, as of June 30, 2010, include a balance of $35.7 million related to these gift card programs which we do not consider available for general working capital purposes. 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 may be 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

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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 investment in shares of common stock of Liberty International PLC, or Liberty, was also accounted for as an available-for-sale security. Effective at the close of business May 7, 2010, Liberty completed a demerger in which it was separated into two companies, Capital Shopping Centres Group PLC, or CSCG, and Capital & Counties Properties PLC, or CAPC. Liberty shareholders acquired the same number of shares of CSCG and CAPC as they owned in Liberty. Our interests in CSCG and CAPC are adjusted to their quoted market price, including a related foreign exchange component.

        On May 7, 2010 we owned 35.4 million shares of Liberty at a carrying cost of £4.52 per share. As a result of the demerger of Liberty, at June 30, 2010, we owned 35.4 million shares of CSCG at a carrying cost of £3.03 per share, and 35.4 million shares of CAPC at a carrying cost of £0.94 per share. The mark-to-market adjustment from March 31, 2010 through June 30, 2010 was a $44.9 million decrease in the value of our investments with a corresponding adjustment in other comprehensive income (loss). The carrying value of our investments in CSCG and CAPC was $166.0 million and $57.8 million, respectively, at June 30, 2010. Our aggregate net unrealized loss on these investments was approximately $8.0 million at June 30, 2010. The carrying value of our investment in Liberty at December 31, 2009 was $290.0 million with an unrealized gain of $58.2 million.

        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 June 30, 2010 and December 31, 2009, we also had investments of $24.9 million and $51.7 million, respectively, which must be used to fund the debt service requirements of mortgage debt related to investment properties 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.

        We have an investment of $70 million in a non-marketable security that we account for under the cost method. We regularly evaluate this investment for any other-than-temporary decline in its estimated fair value.

        Net unrealized (losses) gains as of June 30, 2010 and December 31, 2009 were approximately ($8.6) million and $59.4 million, respectively, and represented the valuation and related currency adjustments for our marketable securities. As of June 30, 2010, we do not consider the decline in value of any 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.

Fair Value Measurements

        We hold marketable securities that total $413.4 million and $464.1 million at June 30, 2010 and December 31, 2009, 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 $23.0 million and $13.0 million at June 30, 2010 and December 31, 2009, respectively, and a gross asset balance of $18.1 million and $0.3 million, respectively. We also have interest rate cap agreements with a minimal asset

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value. 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.

Noncontrolling Interests and Temporary Equity

        In addition to noncontrolling redeemable interests in properties, we classify our 6% Series I Convertible Perpetual Preferred Units, or Series I preferred units, and 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. Prior to their redemption, the holders of the Series I preferred units had the ability to redeem this series of preferred units for cash upon the occurrence of a change in control event, which included a change in the majority of the directors on Simon Property's Board of Directors, or the Board, that occurs over a two year period. Such a change in Board composition could be deemed outside of our control. For the 7.5% preferred units, the redemption of preferred units requires the delivery of fully registered shares of Simon Property common stock. The previous and current carrying amounts of both of these series of preferred units are equal to their 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 routine 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 the Board and Simon Property's 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 we have the unrestricted ability to issue shares of Simon Property 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 through our governance structure, with Simon Property making the decision on our behalf.

        Net income attributable to noncontrolling interests (which includes nonredeemable noncontrolling interests in consolidated properties) is a component of consolidated net income. In addition, the individual components of other comprehensive income (loss) are presented in the aggregate for both controlling and noncontrolling interests, with the portion attributable to noncontrolling interests deducted from comprehensive income (loss) attributable to unitholders.

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        A rollforward of noncontrolling nonredeemable interests 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 primarily to 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 June 30, 2010, 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 included within other liabilities and was $22.5 million and $13.0 million at June 30, 2010 and December 31, 2009, respectively. At December 31, 2009, we also had interest rate swaps with a carrying value of $0.3 million within deferred costs and other assets. The interest rate cap agreements were of no net value at June 30, 2010 and December 31, 2009 and we generally do not apply hedge accounting to these arrangements. 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 $40.1 million and $52.3 million as of June 30, 2010 and December 31, 2009, respectively.

        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 to manage our exposure to changes in foreign exchange rates on certain Yen and Euro-denominated receivables and investments. Currency forward contracts involve fixing the USD-Yen or USD-Euro 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

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date. We entered into USD-Yen forward contracts during 2009 for approximately ¥3 billion that we expect to receive through April 2011 at an average exchange rate of 97.1 USD:JPY. We entered into USD-Yen forward contracts during 2010 for an additional ¥1.7 billion that we expect to receive through October 2012 at an average exchange rate of 89.0 USD:JPY. Approximately ¥2.0 billion remains as of June 30, 2010 for both the 2009 and 2010 contracts. The June 30, 2010 liability balance related to these forwards was $0.5 million and is included in other liabilities and accrued distributions. We have reflected the changes in fair value for these forward contracts in earnings. The underlying currency adjustments on the foreign-denominated receivables are also reflected in income and generally offset the amounts in earnings for these forward contracts. We entered into a USD-Euro forward contract during the first quarter of 2010 for approximately €95.0 million at an exchange rate of 1.41 EUR:USD as a net investment hedge. The changes in fair value of the net investment hedge, which matures on July 31, 2010, are recorded to other comprehensive income (loss), of which the total amount was $18.0 million as of June 30, 2010, and is included in deferred costs and other assets.

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 six months ended June 30, 2010, potentially dilutive securities include options to purchase shares of Simon Property common stock, units granted under our long-term incentive performance programs and preferred units that are convertible into units. The only securities that had a dilutive effect for the three and six months ended June 30, 2010 were stock options of Simon Property. The only securities that had a dilutive effect for the six months ended June 30, 2009 were stock options of Simon Property and contingently issuable units from unit distributions. All potentially dilutive securities were excluded from the calculation of diluted earnings per unit for the three months ended June 30, 2009 because the effect of their conversion would have been anti-dilutive to net loss attributable to common unitholders. 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. We held joint venture ownership interests in 102 properties in the United States as of June 30, 2010 and 103 properties as of December 31, 2009. We also held interests in two joint ventures which owned 52 European shopping centers as of June 30, 2010 and 51 as of December 31, 2009. At June 30, 2010, we also held interests in eight joint venture properties in Japan, one joint venture property in Mexico, and one joint venture property in South Korea. We account for these joint venture properties using the equity method of accounting.

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

Loans to SPG-FCM

        As part of the Mills acquisition, we made loans to SPG-FCM and Mills which were used by SPG-FCM and Mills to repay loans and other obligations of Mills, including the redemption of preferred stock. As of June 30, 2010 and December 31, 2009, the outstanding balance of our remaining loan to SPG-FCM was $661.5 million and $632.0 million, respectively. During the first six months of 2010 and 2009, we recorded approximately $4.8 million and $4.5 million in interest income (net of inter-entity eliminations), related to this loan, respectively. The loan bears interest at a rate of LIBOR plus 275 basis points and matures on June 8, 2011, and can be extended for one year.

International Joint Venture Investments

        European Joint Ventures.    We conduct our international operations in Europe through joint ventures. The carrying amount of our total combined investment in these two joint venture investments was $278.3 million and $298.8 million as of June 30, 2010 and December 31, 2009, respectively, including all related components of accumulated other comprehensive income (loss). We have a 49% ownership interest in Gallerie Commerciali Italia, or GCI, and as of June 30, 2010 we held a 50% interest in Simon Ivanhoe. As discussed further in Note 11, on July 15, 2010 we and our joint venture partner, Ivanhoe Cambridge Inc., or Ivanhoe Cambridge, sold our collective interests in Simon Ivanhoe to Unibail-Rodamco.

        Asian Joint Ventures.    We conduct our international Premium Outlet operations in Japan through a joint venture with Mitsubishi Estate Co., Ltd. The carrying amount of our investment in this Premium Outlet joint venture in Japan was $314.2 million and $302.2 million as of June 30, 2010 and December 31, 2009, respectively, including all related components of accumulated other comprehensive income (loss). We have a 40% ownership in these Japan Premium Outlets. As of June 30, 2010 and December 31, 2009, respectively, our investment in our Premium Outlet in Korea, for which we hold a 50% ownership interest, approximated $27.1 million and $26.1 million including all related components of accumulated other comprehensive income (loss).

        We account for all of our international joint venture investments using the equity method of accounting.

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Summary Financial Information

        A summary of our investments in joint ventures and share of income from such joint ventures follows. We condensed into separate line items major captions of the statements of operations for joint venture interests sold or consolidated. Consolidation occurs when we acquire an additional interest in the joint venture and as a result, gain control of the property or become the primary beneficiary of a VIE. Balance sheet information for the joint ventures is as follows:

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        "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.

6.     Debt

Unsecured Debt

        Our unsecured debt currently consists of $10.8 billion of senior unsecured notes and $500.0 million outstanding under our unsecured revolving credit facility, or the Credit Facility. The Credit Facility has a borrowing capacity of $3.85 billion and contains an accordion feature allowing the maximum borrowing capacity to expand to $4.0 billion. The Credit Facility matures on March 31, 2013. The base interest on the Credit Facility is LIBOR plus 210 basis points and includes a facility fee of 40 basis points.

        The total outstanding balance of the Credit Facility as of June 30, 2010 was $500.0 million, and the maximum outstanding balance during the six months ended June 30, 2010 was approximately

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$500.0 million. The June 30, 2010 balance included $443.0 million (U.S. dollar equivalent) of Euro and Yen-denominated borrowings. During the six months ended June 30, 2010, the weighted average outstanding balance on the Credit Facility was approximately $456.3 million. As further discussed in Note 11, a portion of the proceeds from the sale of our interest in Simon Ivanhoe was used to repay the €167.4 million (approximately $215 million) principal balance on the Euro tranche of the Credit Facility.

        On January 12, 2010, we commenced a cash tender offer for any and all senior unsecured notes of ten outstanding series with maturity dates ranging from 2011 to March 2013. The total principal amount of the notes accepted for purchase on January 26, 2010 was approximately $2.3 billion, with a weighted average duration of 2.0 years and a weighted average coupon of 5.76%. We purchased the tendered notes with cash on hand and the proceeds from an offering of $2.25 billion of senior unsecured notes that closed on January 25, 2010. The senior notes offering was comprised of $400.0 million of 4.20% notes due 2015, $1.25 billion of 5.65% notes due 2020 and $600.0 million of 6.75% notes due 2040. The weighted average duration of the notes offering was 14.4 years and the weighted average coupon was 5.69%. We recorded a $165.6 million charge to earnings in the first quarter of 2010 as a result of the tender offer.

        On March 18, 2010, we repaid a $300.0 million senior unsecured note, which had a fixed rate of 4.875%.

        On June 15, 2010, we repaid a $400.0 million senior unsecured note, which had a fixed rate of 4.60%.

Secured Debt

        Total secured indebtedness was $5.7 billion and $6.6 billion at June 30, 2010 and December 31, 2009, respectively. During the six months ended June 30, 2010, we repaid $792.8 million in mortgage loans, unencumbering three properties with a weighted average interest rate of 4.86%.

        On May 13, 2010, we acquired a property located in Barceloneta, Puerto Rico subject to a $75.2 million mortgage loan. The loan matures on May 1, 2014 and bears interest at LIBOR plus 225 basis points with a LIBOR floor of 1.50%.

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, excluding those with an associated fixed to floating swap, was $14.5 billion and $16.1 billion as of June 30, 2010 and December 31, 2009, respectively. The fair values of financial instruments and our related discount rate assumptions used in the estimation of fair value for our consolidated fixed-rate mortgages and other indebtedness as of June 30, 2010 and December 31, 2009 are summarized as follows:

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7.     Equity

        During the first six months of 2010, thirty-seven limited partners exchanged 166,608 of our units for an equal number of shares of Simon Property common stock. These transactions increased Simon Property's ownership interest in us.

        On May 13, 2010, we issued 77,798 units to the owners of Prime Outlets Acquisition Company in connection with the acquisition of a property located in Barceloneta, Puerto Rico.

        Holders of the Series I preferred units had the right to convert their Series I preferred units into units or exchange the preferred units for shares of Simon Property's Series I 6% Convertible Perpetual Preferred Stock from March 31, 2010 until the date the Series I preferred units were redeemed. The conversion right resulted from the closing sale price of Simon Property's common stock exceeding the applicable trigger price per share for a period of 20 trading days in the last 30 trading days of the prior quarter. Each Series I preferred unit was convertible into units at a conversion ratio of .847495.

        On March 17, 2010, we announced that we would redeem all of the outstanding Series I preferred units on April 16, 2010. The redemption price was equal to the liquidation value per unit plus accumulated and unpaid distributions through the redemption date or $50.4917 per unit.

        Through the redemption date of April 16, 2010, we issued 6,670,589 units as a result of the conversion of 7,871,276 Series I preferred units. In addition, we issued 862,292 limited partner units as a result of the conversion of 1,017,480 Series I preferred units at a conversion ratio of .847495.

Stock Based Compensation

        Under the Simon Property Group, L.P. 1998 Stock Incentive Plan, or the Plan, on April 1, 2010 the Compensation Committee of the Board awarded 1,449 restricted shares of Simon Property common stock to employees at a fair market value of $85.01 per share, and made a special award of 113,403 shares of restricted stock of Simon Property to employees on March 16, 2010 at a fair market value of $84.18 per share. On May 6, 2010, Simon Property's non-employee Directors were awarded 8,137 shares of restricted stock of Simon Property under this plan at a fair market value of $84.88 per share. The fair market value of the restricted stock awarded on March 16 and April 1, 2010 is being recognized as expense over the four-year vesting service period. The fair market value of the restricted stock awarded on May 6, 2010 is being recognized as expense over a one-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 of the Board approved a Long-Term Incentive Performance Program, or LTIP Program, for certain of our senior executive officers. Awards under the LTIP Program take the form of LTIP Units, a form of limited partnership interest issued by us. Awarded LTIP Units will be forfeited, in whole or in part, depending on the extent to which Simon Property's total stockholder return, or TSR, as defined, over the performance period exceeds certain performance targets. During the performance period, participants are entitled to receive 10% of the regular quarterly distributions paid per unit. As a result, we account for these LTIP awards as participating securities under the two-class method of computing earnings per unit. Awarded LTIP Units will be considered earned depending upon the extent to which the applicable TSR benchmarks 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. Units are exchangeable for shares of Simon Property's common stock on a one-for-one basis, or cash, as selected by Simon Property.

        The Compensation Committee awarded LTIP Units under three LTIP Programs having one, two and three year performance periods, which end on December 31, 2010, 2011 and 2012. We refer to these three programs as the one, two and three year 2010 LTIP Programs, or the 2010 LTIP Programs. 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

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years following the end of the applicable performance period, subject to the participant maintaining employment with us through those dates.

        The awards made pursuant to the 2010 LTIP Program have an aggregate grant date fair value, adjusted for estimated forfeitures and as determined in accordance with Financial Accounting Standards Board Accounting Standards Codification Topic 718, 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. Grant date fair value was 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 value is being amortized into expense over the period from the grant date to the date at which the awards, if any, become vested. During the six months ended June 30, 2010, we recognized $6.2 million of compensation expense under the LTIP Program.

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

        There have been no material developments with respect to the pending litigation disclosed in our 2009 Annual Report on Form 10-K and no new material developments or litigation have arisen since those disclosures were made.

        We are involved in various legal proceedings that arise in the ordinary course of our business. We believe that such routine litigation, claims and administrative proceedings will not have a material adverse impact on our financial position, results of operations or cash flows. We record a contingent liability when a loss is considered probable and the amount can be reasonably estimated.

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Guarantees of Indebtedness

        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 June 30, 2010, we guaranteed $48.0 million of the total joint venture related mortgage or other indebtedness of $6.6 billion then outstanding.

9.     Real Estate Acquisitions and Dispositions

        During the six months ended June 30, 2010, we disposed of one regional mall, one community center, two other retail properties, a non-retail building and our interest in an international joint venture property for an aggregate net gain of $26.1 million.

        During the six months ended June 30, 2010, we completed two acquisitions. On May 13, 2010, we acquired a property located in Barceloneta, Puerto Rico from Prime Outlets Acquisition Company and on May 28, 2010, we acquired an additional interest of approximately 19% in Houston Galleria, located in Houston, Texas thereby increasing our interest from 31.5% to 50.4%. The total cost of the acquisitions was approximately $385 million, including the assumption of existing indebtedness.

        We entered into a definitive agreement in December 2009 to acquire a portfolio of outlet shopping centers from Prime Outlets Acquisition Company and certain of its affiliated entities, subject to existing fixed rate indebtedness and outstanding preferred stock. Our definitive agreement was subsequently amended to allow for the acquisition of Prime's operating shopping center in Barceloneta, Puerto Rico, and to remove one of Prime's operating properties and two of its development sites from the transaction. The portfolio to be acquired from Prime consists of 21 outlet centers located primarily in major metropolitan markets (including the asset in Puerto Rico which we acquired on May 13, 2010). We will pay aggregate consideration consisting of cash and units of approximately $0.7 billion for the owners' interests. The acquisition is subject to several closing conditions relating to certain of the existing financing arrangements. The Federal Trade Commission is currently reviewing the transaction and we are cooperating with that review. Although we expect to acquire the remaining Prime properties later in the year, we cannot predict the outcome of the FTC review or when it will be completed.

10.   Recently Issued Accounting Pronouncement

        On January 1, 2010, we adopted the amendment on the accounting and disclosure requirements for the consolidation of variable interest entities (VIEs). This amendment requires an enterprise to perform a qualitative analysis when determining whether or not it must consolidate a VIE. The amendment also requires an enterprise to continuously reassess whether it must consolidate a VIE. Additionally, the amendment requires enhanced disclosures about an enterprise's involvement with VIEs and any significant change in risk exposure due to that involvement, as well as how its involvement with VIEs impacts the enterprise's financial statements. Finally, an enterprise will be required to disclose significant judgments and assumptions used to determine whether or not to consolidate a VIE. The adoption of this amendment did not have a significant impact on our financial position, results of operations, or cash flows.

11.   Subsequent Events

        On July 15, 2010, we and our partner in Simon Ivanhoe, Ivanhoe Cambridge, sold our collective interests in Simon Ivanhoe which owned seven shopping centers located in France and Poland to Unibail-Rodamco. The joint venture partners received net consideration of €422.5 million for their interests after the repayment of all joint venture debt, subject to certain post-closing adjustments. Our share of the gain on sale of our interests in Simon Ivanhoe is approximately $280 million. A portion of the proceeds were used to repay the €167.4 million (approximately $215 million) principal balance on the Euro tranche of the Credit Facility.

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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.

        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 June 30, 2010, we owned or held an interest in 318 income-producing properties in the United States, which consisted of 161 regional malls, 42 Premium Outlets, 66 community/lifestyle centers, 36 properties acquired in the 2007 acquisition of The Mills Corporation, or Mills, and 13 other shopping centers or outlet centers in 41 states and Puerto Rico. Of the 36 properties in the Mills portfolio, 16 of these properties are The Mills, 16 are regional malls, and four are community centers. Internationally, as of June 30, 2010, we had ownership interests in 52 European shopping centers (France, Italy and Poland), eight Premium Outlets in Japan, one Premium Outlet in Mexico, and one Premium Outlet in South Korea. On July 15, 2010, we and our joint venture partner sold our collective interests in Simon Ivanhoe S.à.r.l., or Simon Ivanhoe, which owned seven shopping centers located in France and Poland. We also have entered into a definitive agreement to acquire a portfolio of 21 outlet shopping centers as described in Note 9 of the notes to the accompanying financial statements.

        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 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:

•

Focusing on leasing to increase revenues and using economies of scale to reduce operating expenses,



•

Expanding and re-tenanting existing franchise locations at competitive market rates,



•

Selectively acquiring high quality real estate assets or portfolios of assets, and



•

Selling 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 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 sale of energy,

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•

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 loans made to related entities.

        We focus on high quality real estate across the retail real estate spectrum. We expand or renovate to enhance the 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 $0.22 during the first six months of 2010, or 64.7%, to $0.56 from $0.34 for the same period last year. Significant factors contributing to the year-over-year change included:

•

improved operating performance and favorable movement of core business fundamentals,



•

a gain on sale of assets and interests in unconsolidated entities of $26.1 million, or $0.07 per diluted unit,



•

a $140.5 million, or $0.45 per diluted unit, other-than-temporary impairment charge related to our investment in Liberty International PLC, or Liberty, recorded in the first six months of 2009 due to the significance and duration of the decline in quoted fair value, including related currency exchange component, below the carrying value of the securities, and



•

a $165.6 million, or $0.48 per diluted unit, debt extinguishment charge recorded during the first quarter of 2010 related to our senior unsecured notes tender offer.

        Core business fundamentals during the first six months of 2010 improved from the difficult economic environment that existed during the first six months of 2009. Comparable sales per square foot, or psf, increased to $474 psf, or 3.9%, for our Regional Malls and Premium Outlets. Average base rents increased 0.3% to $38.62 psf as of June 30, 2010, from $38.49 psf as of June 30, 2009. Leasing spreads remained positive as we were able to lease available square feet at higher rents than the expiring rental rates resulting in a leasing spread of $0.50 psf as of June 30, 2010, representing a 1.2% increase over expiring rents. Occupancy was 93.1% as of June 30, 2010, as compared to 92.3% as of June 30, 2009, an increase of 80 basis points.

        Our effective overall borrowing rate at June 30, 2010 increased 13 basis points to 5.70% as compared to 5.57% at June 30, 2009. This increase was primarily due to an increase in our effective overall borrowing rate on variable rate debt of 62 basis points (1.83% at June 30, 2010 as compared to 1.21% at June 30, 2009) as a result of increased borrowing spreads and LIBOR floors. This increase was offset in part by a $941.5 million decrease in our portfolio of fixed rate debt. At June 30, 2010, the weighted average years to

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maturity of our consolidated indebtedness was approximately 5.6 years as compared to December 31, 2009 of approximately 4.1 years. Our financing activities for the six months ended June 30, 2010, included:

•

completing a cash tender offer for any and all senior unsecured notes of ten outstanding series with maturity dates ranging from 2011 to March 2013. The total principal amount of the notes accepted for purchase on January 26, 2010 was approximately $2.3 billion, with a weighted average duration of 2.0 years and a weighted coupon of 5.76%. We purchased the tendered notes with cash on hand and the proceeds from an offering of $2.25 billion of senior unsecured notes which closed on January 25, 2010. The senior notes offering was comprised of $400.0 million of 4.20% notes due 2015, $1.25 billion of 5.65% notes due 2020 and $600.0 million of 6.75% notes due 2040. The weighted average duration of the notes offering was 14.4 years and the weighted average coupon was 5.69%. We reported a $165.6 million loss on extinguishment of debt in the first quarter of 2010 as a result of the tender offer.



•

increasing our borrowings on our unsecured revolving credit facility, or Credit Facility, to $500.0 million during the six months ended June 30, 2010.



•

redeeming a $300.0 million maturing unsecured note which had a fixed rate of 4.875%.



•

redeeming a $400.0 million maturing unsecured note which had a fixed rate of 4.60%.



•

unencumbering three properties by repaying $792.8 million in mortgage loans with a weighted average interest rate of 4.86%.



•

acquiring a property located in Barceloneta, Puerto Rico on May 13, 2010 subject to an existing $75.2 million variable-rate mortgage, which matures on May 1, 2014 and bears interest at a rate of LIBOR plus 225 basis points with a LIBOR floor of 1.50%.

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United States Portfolio Data

        The portfolio data discussed in this overview includes the following key operating statistics: occupancy, average base rent per square foot, and comparable 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 below related to community/lifestyle centers, the Mills properties and the Mills Regional Malls, 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. Percentages and basis point changes are representative of the change from the comparable prior period.

        Occupancy Levels and Average Base Rent Per Square Foot.    Occupancy and average base rent are based on gross leasable area, or GLA, owned by us in the regional malls, all tenants at the Premium Outlets, all tenants in the Mills portfolio, and all tenants at community/lifestyle centers. Our portfolio has maintained stable occupancy while average base rents have increased.

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        Comparable Sales Per Square Foot.    Comparable 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 key operating statistics are provided for our international properties, which we account for using the equity method of accounting.

Results of Operations

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

•

During the first six months of 2010, we disposed of one regional mall, one community center, two other retail properties and a non-retail building.



•

On May 13, 2010, we acquired a property located in Barceloneta, Puerto Rico from Prime Outlets Acquisition Company.



•

On March 11, 2010, we opened Phase II of The Domain, in Austin, Texas.



•

During 2009, we sold four consolidated properties consisting of three community centers and one other retail property.



•

During the fourth quarter of 2009, we recognized a $20 million loss on our joint venture interests in our shopping centers in China resulting from the sale of our interests to affiliates of our Chinese partner for approximately $29 million.



•

On August 6, 2009, we opened Cincinnati Premium Outlets, a 400,000 square foot outlet located in Warren County, Ohio, north of Cincinnati.



•

On April 23, 2009, we opened The Promenade at Camarillo Premium Outlets, a 220,000 square foot expansion located in Ventura County, north of Los Angeles.

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

•

On May 28, 2010, we acquired an additional interest of approximately 19% in Houston Galleria, located in Houston, Texas thereby increasing our interest from 31.5% to 50.4%.



•

On April 29, 2010, Gallerie Commerciali Italia, or GCI, one of our European joint ventures in which we hold a 49% ownership interest, sold its 40% interest in Porta di Roma for €71 million.



•

On March 25, 2010, GCI opened Catania, a 642,000 square foot shopping center in Sicily, Italy.



•

On March 2, 2010, GCI opened Argine, a 300,000 square foot shopping center in Naples, Italy.



•

On July 9, 2009, Chelsea Japan Company, Ltd., the joint venture which operates the Japanese Premium Outlets in which we have a 40% ownership interest, opened Ami Premium Outlets located in Ami, Japan.

        For the purposes of the following comparison between the six months ended June 30, 2010 and 2009, 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 2010 and 2009.

Three Months Ended June 30, 2010 vs. Three Months Ended June 30, 2009

        Minimum rents increased $12.5 million during the 2010 period, of which the property transactions accounted for $3.8 million of the increase. Comparable rents increased $8.7 million, or 1.5%. This was primarily due to an increase in minimum rents of $7.9 million due to occupancy gains, a $1.7 million increase in straight-line rents and an increase in rents from carts, kiosks, and other temporary tenants of $0.4 million, offset by a $1.3 million decrease in comparable property activity, primarily attributable to a decline in the fair market value of in-place lease amortization.

        Management fees and other revenues decreased $1.7 million principally as a result of decreased fee revenue due to the reduced level of development activity in 2010.

        Total other income increased $20.0 million, and was principally the result of the following:

•

an increase in lease settlement income of $12.8 million and



•

an increase in interest income of $9.8 million,



•

offset by a decrease in other net activity of $2.6 million, primarily due to land sale activity and one-time fees from our international joint ventures recognized in 2009.

        Property operating costs decreased $5.6 million, or 5.2%, primarily related to lower utility costs resulting from our cost control and reduction initiatives.

        Depreciation and amortization expense decreased $17.5 million due to the impact of the acceleration of depreciation for certain properties scheduled for redevelopment, offset by a slight increase as a result of openings and expansion activity.

        The provision for credit losses decreased $2.6 million due to a reduction in the number of tenants in default and a decrease in the number of tenants in bankruptcy proceedings compared to the second quarter of 2009.

        During the quarter ended June 30, 2009, we recognized a non-cash charge of $140.5 million representing the other-than-temporary impairment in the fair value of our investment in Liberty.

        During the quarter ended June 30, 2010, we incurred $11.3 million in transaction expenses related to costs associated with actual and potential acquisition related activities.

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        Other expenses decreased $4.8 million due to decreased professional fees, including legal fees and related costs, and a decrease in foreign currency losses related to receivable revaluations due to fluctuations in exchange rates.

        Interest expense increased $17.0 million primarily related to our issuance of unsecured notes totaling $2.3 billion on January 25, 2010 and $600 million in August 2009 and the result of new or refinanced debt at several properties, offset by the impact of the unsecured notes acquired in the January 2010 tender offer, and the mortgage loans that were repaid.

        Income from unconsolidated entities increased $5.1 million primarily due to favorable results of operations over the prior period, acquisition of additional interests and openings and expansion activity.

        Gain on sale or disposal of assets and interests in unconsolidated entities increased $20.0 million, primarily a result of the gain on sale of Porta di Roma by GCI.

        Preferred unit distribution requirements decreased $11.2 million as a result of the conversion and redemption of the 6% Series I Convertible Perpetual Preferred Units, or Series I preferred units, to units or cash during 2010 and 2009.

Six Months Ended June 30, 2010 vs. Six Months Ended June 30, 2009

        Minimum rents increased $12.7 million during the 2010 period of which the property transactions accounted for $6.0 million of the increase. Comparable rents increased $6.7 million, or 0.6%. The increase in comparable minimum rents was primarily attributable to an $11.9 million increase in base minimum rents and a $2.6 million increase in comparable rents from carts, kiosks, and other temporary tenants, offset by a $3.2 million decline in the fair market value of in-place lease amortization and a $4.6 million decrease in straight-line rents. Overage rents increased $1.7 million, or 6.5%, as a result of an increase in tenant sales for the period as compared to the prior period.

        Management fees and other revenues decreased $3.8 million principally as a result of decreased fee revenue due to the reduced level of development activity in 2010.

        Total other income increased $30.6 million, and was principally the result of the following:

•

an increase in lease settlement income of $19.9 million and



•

an increase in interest income of $11.0 million,



•

offset by a decrease in other net activity of $0.3 million.

        Property operating costs decreased $13.0 million, or 6.1%, primarily related to lower utility costs resulting from our cost control and reduction initiatives.

        Depreciation and amortization expense decreased $44.9 million due to the impact of the acceleration of depreciation in 2009 for certain properties scheduled for redevelopment, offset by a slight increase as a result of openings and expansion activity.

        The provision for credit losses decreased $19.0 million due to a reduction in the number of tenants in default and a decrease in the number of tenants in bankruptcy proceedings compared to the same period in 2009. We also had strong collections of receivables which had been reserved due to uncertainty of payment.

        Home and regional office expense decreased $8.8 million primarily due to decreased personnel costs attributable to our cost control initiatives and a final payment for a long-term incentive compensation plan.

        During 2009, we recognized a non-cash charge of $140.5 million representing the other-than-temporary impairment in the fair value of our investment in Liberty.

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        During 2010, we incurred $15.0 million in transaction expenses related to costs associated with actual and potential acquisition related activities.

        Other expenses decreased $8.5 million due to decreased professional fees, including legal fees and related costs, and a decrease in foreign currency losses related to receivable revaluations due to fluctuations in exchange rates.

        Interest expense increased $54.9 million primarily related to our issuance of unsecured notes totaling $2.3 billion on January 25, 2010 and $1.8 billion during 2009 and the result of new or refinanced debt at several properties, offset by the impact of the unsecured notes acquired in the January 2010 tender offer and mortgage loans which were repaid during the 2010 period.

        During 2010, we incurred a loss on extinguishment of debt of $165.6 million related to the charge for the unsecured note tender offer.

        Income from unconsolidated entities increased $17.1 million primarily due to favorable results of operations over the prior period, a property opening and expansion in Japan, a decrease in the provision for credit losses and interest savings.

        Gain on sale or disposal of assets and interests in unconsolidated entities increased $26.1 million primarily as a result of the gain on sale of Porta di Roma by GCI.

        Preferred unit distribution requirements decreased $15.1 million as a result of the conversion and redemption of the Series I preferred units to units or cash during 2010 and 2009.

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. Floating rate debt currently comprises approximately 11.0% of our total consolidated debt. We also enter into interest rate protection agreements as appropriate 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 $830.8 million during the first half of 2010. In addition, our Credit Facility provides an alternative source of liquidity as our cash needs vary from time to time.

        Our balance of cash and cash equivalents decreased $1.7 billion during the first six months of 2010 to $2.3 billion as of June 30, 2010 primarily due to the use of cash to reduce indebtedness. Our balance of cash and cash equivalents as of June 30, 2010 and December 31, 2009, includes $35.7 million and $38.1 million, respectively, related to our co-branded gift card programs, which we do not consider available for general working capital purposes.

        On June 30, 2010, we had available borrowing capacity of approximately $3.3 billion under the Credit Facility, net of outstanding borrowings of $500.0 million and letters of credit of $2.8 million. For the six months ended June 30, 2010, the maximum amount outstanding under the Credit Facility was $500.0 million and the weighted average amount outstanding was approximately $456.3 million. The weighted average interest rate was 2.35% for the six months ended June 30, 2010.

        We have historically had access to public unsecured debt markets and access to private equity from institutional investors at the property level.

        Our business model requires us to regularly access the debt and equity capital markets to raise funds for acquisition and development activity, redevelopment capital, and to refinance maturing debt. We believe we have sufficient cash on hand and availability under our corporate Credit Facility to address our debt maturities and capital needs through 2011.

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        As discussed further in "Financing and Debt" below, on January 12, 2010, we commenced a tender offer to purchase ten outstanding series of notes. We subsequently purchased $2.285 billion of notes on January 26, 2010. The purchase of the notes was primarily funded with proceeds from the sale of $2.25 billion of senior unsecured notes issued on January 25, 2010.

Loans to SPG-FCM

        As part of the Mills acquisition, we made loans to SPG-FCM Ventures, LLC, or SPG-FCM, and Mills which were used by SPG-FCM and Mills to repay loans and other obligations of Mills, including the redemption of preferred stock. As of June 30, 2010 and December 31, 2009, the outstanding balance of our remaining loan to SPG-FCM was $661.5 million and $632.0 million, respectively. During the first six months of 2010 and 2009, we recorded approximately $4.8 million and $4.5 million in interest income (net of inter-entity eliminations), related to this loan, respectively. The loan bears interest at a rate of LIBOR plus 275 basis points and matures on June 8, 2011, and can be extended for one year.

Cash Flows

        Our net cash flow from operating activities and distributions of capital from unconsolidated entities for the six months ended June 30, 2010, totaled $830.8 million. In addition, we had net repayments from all of our debt financing and repayment activities in this period of $1.5 billion and an additional $165.6 million primarily related to premiums paid to par as a result of the note tender offer. These activities are further discussed below in "Financing and Debt." During the 2010 period, we also:

•

paid unitholder distributions totaling $417.0 million,



•

paid preferred unit distributions totaling $6.3 million,



•

funded consolidated capital expenditures of $128.7 million (these capital expenditures include development costs of $16.5 million, renovation and expansion costs of $44.1 million, and tenant costs and other operational capital expenditures of $68.1 million),



•

funded investments in unconsolidated entities of $155.2 million, and



•

redeemed the remaining outstanding shares of Series I preferred units for $11.0 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 necessary to maintain Simon Property's REIT qualification for 2010. 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 operations and working capital reserves,



•

borrowings on our 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 2010, and we consider these projected cash flows in our sources and uses of cash. These cash flows are principally derived from retail tenants, many of whom continue to experience financial distress. A significant deterioration in projected cash flows from operations could cause us to increase our reliance on available funds from our 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 June 30, 2010 our unsecured debt consisted of $10.8 billion of senior unsecured notes and $500.0 million outstanding under our Credit Facility. The Credit Facility has a borrowing capacity of $3.85 billion and contains an accordion feature allowing the maximum borrowing capacity to expand to $4.0 billion. The Credit Facility matures on March 31, 2013. The base interest on the Credit Facility is LIBOR plus 210 basis points and includes a facility fee of 40 basis points.

        During the six months ended June 30, 2010, we drew from the Credit Facility to fund a portion of the acquisition of the purchase of a property in Barceloneta, Puerto Rico. All other amounts drawn on the Credit Facility during the period were for general working capital purposes. The total outstanding balance of the Credit Facility as of June 30, 2010 was $500.0 million, and the maximum outstanding balance during the six months ended June 30, 2010 was approximately $500.0 million. During the six months ended June 30, 2010, the weighted average outstanding balance on the Credit Facility was approximately $456.3 million. The outstanding balance as of June 30, 2010 includes $443.0 million (U.S. dollar equivalent) of Euro and Yen-denominated borrowings. On July 23, 2010 we repaid the €167.4 million (approximately $215 million) principal balance on the Euro tranche of our Credit Facility.

        On January 12, 2010, we commenced a cash tender offer for any and all senior unsecured notes of ten outstanding series with maturity dates ranging from 2011 to March 2013. The total principal amount of the notes accepted for purchase on January 26, 2010 was approximately $2.3 billion, with a weighted average duration of 2.0 years and a weighted average coupon of 5.76%. We purchased the tendered notes with cash on hand and the proceeds from an offering of $2.25 billion of senior unsecured notes that closed on January 25, 2010. The senior notes offering was comprised of $400.0 million of 4.20% notes due 2015, $1.25 billion of 5.65% notes due 2020 and $600.0 million of 6.75% notes due 2040. The weighted average duration of the notes offering was 14.4 years and the weighted average coupon was 5.69%. We recorded a $165.6 million charge to earnings in the first quarter of 2010 as a result of the tender offer.

        On March 18, 2010, we repaid a $300.0 million senior unsecured note, which had a fixed rate of 4.875%.

        On June 15, 2010, we repaid a $400.0 million senior unsecured note, which had a fixed rate of 4.60%.

Secured Debt

        Total secured indebtedness was $5.7 billion and $6.6 billion at June 30, 2010 and December 31, 2009, respectively. During the six months ended June 30, 2010, we repaid $792.8 million in mortgage loans, unencumbering three properties with a weighted average interest rate of 4.86%.

        On May 13, 2010, we acquired a property in Barceloneta, Puerto Rico subject to an existing $75.2 million mortgage loan. The loan matures on May 1, 2014 and bears interest at LIBOR plus 225 basis points with a LIBOR floor of 1.50%.

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Summary of Financing

        Our consolidated debt, adjusted to reflect outstanding derivative instruments, and the effective weighted average interest rates as of June 30, 2010, and December 31, 2009, consisted of the following (dollars in thousands):

        As of June 30, 2010, we had $693.3 million of notional amount fixed rate swap agreements that have a weighted average fixed pay rate of 2.79% and a weighted average variable receive rate of 0.51%. As of June 30, 2010, the net effect of these agreements effectively converted $693.3 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 commitments previously disclosed in our 2009 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 June 30, 2010, for the remainder of 2010 and subsequent years thereafter (dollars in thousands) assuming the indebtedness remains outstanding through initial maturities:

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(1)

Represents principal maturities only and therefore, excludes net discounts of $7,769.

(2)

Variable rate interest payments are estimated based on the LIBOR rate at June 30, 2010.

        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 notes to the accompanying 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 June 30, 2010, we had guaranteed $48.0 million of the total joint venture related mortgage or other indebtedness of $6.6 billion then outstanding. 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. Our partners in our joint venture properties may initiate these provisions at any time. If we determine it is in our unitholders' 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

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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 May 13, 2010, we acquired a property located in Barceloneta, Puerto Rico, from Prime Outlets Acquisition Company and on May 28, 2010, we acquired an additional interest of approximately 19% in Houston Galleria, located in Houston, Texas thereby increasing our interest from 31.5% to 50.4%.

        We entered into a definitive agreement in December 2009 to acquire a portfolio of outlet shopping centers from Prime Outlets Acquisition Company and certain of its affiliated entities, subject to existing fixed rate indebtedness and outstanding preferred stock. Our definitive agreement was subsequently amended to allow for the acquisition of Prime's operating shopping center in Barceloneta, Puerto Rico, and to remove one of Prime's operating properties and two of its development sites from the transaction. The portfolio to be acquired from Prime consists of 21 outlet centers located primarily in major metropolitan markets (including the asset in Puerto Rico which we acquired on May 13, 2010). We will pay aggregate consideration consisting of cash and units of approximately $0.7 billion for the owners' interests. The acquisition is subject to several closing conditions relating to certain of the existing financing arrangements. The Federal Trade Commission is currently reviewing the transaction and we are cooperating with that review. Although we expect to acquire the remaining Prime properties later in the year, we cannot predict the outcome of the FTC review or when it will be completed.

        Dispositions.    We continue to pursue the disposition of properties that no longer meet our strategic criteria or that are not the primary retail venue within their trade area. During the six months ended June 30, 2010, we disposed of one regional mall, one community center, two other retail properties, a non-retail building and our interest in one international joint venture property for an aggregate gain of $26.1 million.

        On July 15, 2010, we and our partner in Simon Ivanhoe, Ivanhoe Cambridge, Inc., or Ivanhoe Cambridge, sold our collective interests in Simon Ivanhoe which owned seven shopping centers located in France and Poland to Unibail-Rodamco. The joint venture partners received net consideration of €422.5 million for their interests after the repayment of all joint venture debt, subject to certain post-closing adjustments. Our share of the gain on sale of our interests in Simon Ivanhoe is approximately $280 million. A portion of the proceeds were used to repay the €167.4 million (approximately $215 million) principal balance on the Euro tranche of our Credit Facility.

Development Activity

        New Domestic Development, Expansions and Renovations.    Given the downturn in the economy, we have substantially reduced our development spending as well as strategic expansions and renovation from historical levels. As economic conditions have improved, we have modestly increased the pace of our development and redevelopment activity. Our share of the cost of new development, renovation or expansion projects that we expect to initiate or complete in 2010 is approximately $200.0 million. We expect to fund these capital projects with cash flow from operations.

        International Development Activity.    We typically reinvest net cash flow from our international investments 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 our European investments with Euro-denominated borrowings that act as a natural hedge against local currency fluctuations. This has also been the case with our Premium Outlets in Japan, Korea, and Mexico where we use Yen, Won, and Peso denominated financing, respectively. Currently, our consolidated net income exposure to changes in the volatility of the Euro, Yen, Won, Peso and other foreign currencies is not material. We expect our share of international development costs for 2010 will be approximately $59.0 million.

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        The carrying amount of our total combined investment in Simon Ivanhoe and GCI, as of June 30, 2010, including all related components of other comprehensive income, was $278.3 million. Our investments in Simon Ivanhoe and GCI are accounted for using the equity method of accounting. We have a 49% ownership interest in GCI and as of June 30, 2010, we held a 50% interest in Simon Ivanhoe. In March 2010, two European developments opened, adding approximately 942,000 square feet of GLA for a total net cost of approximately €221 million, of which our share was approximately €53 million, or $64.8 million based on current Euro:USD exchange rates. Although we sold our joint venture interest in Simon Ivanhoe on July 15, 2010, we and Ivanhoe Cambridge have the right to participate with Unibail-Rodamco in the potential development of up to five new retail projects in the Simon Ivanhoe pipeline, subject to customary approval rights. We own a 25% interest in any of these projects in which we agree to participate.

        As of June 30, 2010, the carrying amount of our 40% joint venture investment in the eight Japanese Premium Outlets including all related components of other comprehensive income was $314.2 million. Currently, Toki Premium Outlets Phase III and Tosu Premium Outlets Phase III are under construction in Japan. Toki Premium Outlets Phase III is a 62,000 square foot expansion to the Toki Premium Outlet located in Toki, Japan. Tosu Premium Outlets Phase III is a 52,000 square foot expansion to the Tosu Premium Outlet located in Fukuoka, Japan. The combined projected net cost of these projects is JPY 5.3 billion, of which our share is approximately JPY 2.1 billion, or $24.0 million based on applicable Yen:USD exchange rates.

        Prior to May 7, 2010 we held a minority interest in Liberty, a U.K. Real Estate Investment Trust that operated regional shopping centers and owned other prime retail assets throughout the U.K. Effective at the close of business May 7, 2010, Liberty completed a demerger in which it was separated into two companies, Capital Shopping Centres Group PLC, or CSCG, and Capital & Counties Properties PLC, or CAPC. Liberty shareholders acquired the same number of shares of CSCG and CAPC as they owned in Liberty. CSCG operates regional shopping centers and is the owner of other retail assets primarily located in the United Kingdom. CAPC is predominantly focused on property investment and development in central London. Our interest in CSCG and CAPC is adjusted to their quoted market price, including a related foreign exchange component.

Distributions

        We paid a distribution of $0.60 per unit in the second quarter of 2010. 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, 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

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relating to joint venture properties, costs of common area maintenance, competitive market forces, risks related to international activities, insurance costs and coverage, terrorist activities, changes in economic and market conditions and maintenance of 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 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 2009 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, 2009.

Item 4.    Controls and Procedures

        Evaluation of Disclosure Controls and Procedures.    We carried out an evaluation under the supervision and with participation of management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our "disclosure controls and procedures" (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the "Exchange Act")) as of the end of the period covered by this Quarterly Report on Form 10-Q. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of June 30, 2010.

        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 June 30, 2010 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

        There have been no material developments with respect to the pending litigation disclosed in our 2009 Annual Report on Form 10-K and no new material developments or litigation have arisen since those disclosures were made.

        We are involved in various legal proceedings that arise in the ordinary course of our business. We believe that such routine litigation, claims and administrative proceedings will not have a material adverse impact on our financial position or our results of operations. We record a contingent 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 2009 Annual Report on Form 10-K.

Item 5.    Other Information

        During the quarter covered by this report, no services were pre-approved by the Audit Committee of Simon Property Group, Inc.'s Board of Directors related to 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.

        An updated consent from Ernst & Young LLP is filed as Exhibit 23.1 to this report.

Item 6.    Exhibits

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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 23.1

Consent of Independent Registered Public Accounting Firm

        We consent to the incorporation by reference in the Registration Statement (Form S-3 No. 333-157794-01) of Simon Property Group, L.P. and in the related prospectus of our reports dated March 12, 2010, with respect to the consolidated financial statements and schedule of Simon Property Group, L.P. and Subsidiaries, and the effectiveness of internal control over financial reporting of Simon Property Group, L.P. and Subsidiaries included in its Annual Report (Form 10-K) for the year ended December 31, 2009.

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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 31.2

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 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 June 30, 2010 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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