<PAGE>   1
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
 
                            ------------------------
 
                                  FORM 10-Q/A
 
                            ------------------------
 
                               (AMENDMENT NO. 1)
 
(MARK ONE)
 
[X]   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
       OF THE SECURITIES EXCHANGE ACT OF 1934
 
       FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1996
 
                                          OR
 
[  ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
       OF THE SECURITIES EXCHANGE ACT OF 1934
 
FOR THE TRANSITION PERIOD FROM  _________ TO  _________
COMMISSION FILE NUMBER 33-98364
 
                            ------------------------
 
                           SIMON PROPERTY GROUP, L.P.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                           <C>
                   DELAWARE                                     35-1903854
         (STATE OR OTHER JURISDICTION              (I.R.S. EMPLOYER IDENTIFICATION NO.)
      OF INCORPORATION OR ORGANIZATION)
          115 WEST WASHINGTON STREET
            INDIANAPOLIS, INDIANA                                 46204
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                     (ZIP CODE)
</TABLE>
 
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (317) 636-1600
 
                            ------------------------
 
     INDICATE BY CHECK MARK WHETHER THE REGISTRANT (1) HAS FILED ALL REPORTS
REQUIRED TO BE FILED BY SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF
1934 DURING THE PRECEDING 12 MONTHS (OR FOR SUCH SHORTER PERIOD THAT THE
REGISTRANT WAS REQUIRED TO FILE SUCH REPORTS), AND (2) HAS BEEN SUBJECT TO SUCH
FILING REQUIREMENTS FOR THE PAST 90 DAYS.  YES   X    NO  _____
 
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<PAGE>   2
 
                           SIMON PROPERTY GROUP, L.P.
 
                                   FORM 10-Q
                                     INDEX
 
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        ----
<S>                                                                                     <C>
PART I -- FINANCIAL INFORMATION PAGE
  Item 1: Financial Statements
     Consolidated Condensed Balance Sheets as of September 30, 1996 and December 31,
      1995............................................................................    3
     Consolidated Condensed Statements of Operations for the three-month and
      nine-month periods ended September 30, 1996 and 1995............................    4
     Consolidated Condensed Statements of Cash Flows for the nine-month periods ended
      September 30, 1996 and 1995.....................................................    5
     Notes to Consolidated Condensed Financial Statements.............................    6
  Item 2: Management's Discussion and Analysis of Financial Condition and
     Results of Operations............................................................   15
PART II -- OTHER INFORMATION
  Items 1 through 6...................................................................   22
  Signatures..........................................................................   23
</TABLE>
 
                                        2
<PAGE>   3
 
                           SIMON PROPERTY GROUP, L.P.
 
                     CONSOLIDATED CONDENSED BALANCE SHEETS
                      (Unaudited and Dollars in Thousands)
 
<TABLE>
<CAPTION>
                                                                     SEPTEMBER 30,     DECEMBER 31,
                                                                         1996              1995
                                                                     -------------     ------------
<S>                                                                  <C>               <C>
ASSETS:
  Investment properties, at cost...................................   $ 2,392,124       $2,162,161
  Less -- accumulated depreciation.................................       212,751          152,817
                                                                       ----------       ----------
                                                                        2,179,373        2,009,344
  Cash and cash equivalents........................................        44,635           62,721
  Tenant receivables and accrued revenue, net......................       143,095          144,400
  Notes receivable and advances due from Management Company........        63,978          102,522
  Investment in partnerships and joint ventures, at equity.........       136,099          113,676
  Deferred costs, net..............................................        75,531           81,398
  Other assets.....................................................        40,673           42,375
                                                                       ----------       ----------
     Total assets..................................................   $ 2,683,384       $2,556,436
                                                                       ==========       ==========
LIABILITIES AND PARTNERS' EQUITY:
  Mortgages and other notes payable................................   $ 2,136,651       $1,980,759
  Accounts payable and accrued expenses............................       117,330          113,131
  Advance from affiliate...........................................        77,153               --
  Accrued distributions............................................         2,031           48,594
  Cash distributions and losses in partnerships and joint ventures,
     at equity.....................................................        16,796           54,120
  Investment in Management Company.................................        18,415           20,612
  Other liabilities................................................        41,455           19,582
                                                                       ----------       ----------
     Total liabilities.............................................     2,409,831        2,236,798
                                                                       ----------       ----------
COMMITMENTS AND CONTINGENCIES
LIMITED PARTNER'S EQUITY INTEREST, 37,282,628 UNITS OUTSTANDING AS
  OF DECEMBER 31, 1995 AT REDEMPTION VALUE (Note 9)................            --          908,764
PARTNERS' EQUITY:
  Preferred units, 4,000,000 authorized, issued and outstanding....        99,923           99,923
  General Partner, 958,429 and 58,360,195 units outstanding at
     September 30, 1996 and December 31, 1995, respectively........         1,795          135,710
  Special Limited Partners' Interest, 94,884,424 units
     outstanding...................................................       177,710               --
  Adjustment to reflect Limited Partners' equity interest at
     redemption value (Note 9).....................................            --         (822,072)
  Unamortized restricted stock award...............................        (5,875)          (2,687)
                                                                       ----------       ----------
     Total partners' equity (deficit)..............................       273,553         (589,126)
                                                                       ----------       ----------
     Total liabilities, limited partners' equity interest and
       partners' equity (deficit)..................................   $ 2,683,384       $2,556,436
                                                                       ==========       ==========
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                        3
<PAGE>   4
 
                           SIMON PROPERTY GROUP, L.P.
 
                CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
         (UNAUDITED AND DOLLARS IN THOUSANDS, EXCEPT PER UNIT AMOUNTS)
 
<TABLE>
<CAPTION>
                                                      FOR THE THREE MONTHS       FOR THE NINE MONTHS
                                                       ENDED SEPTEMBER 30,       ENDED SEPTEMBER 30,
                                                      ---------------------     ---------------------
                                                        1996         1995         1996         1995
                                                      --------     --------     --------     --------
<S>                                                   <C>          <C>          <C>          <C>
REVENUE:
  Minimum rent......................................  $ 83,109     $ 75,242     $243,047     $222,701
  Overage rent......................................     5,169        5,982       15,920       15,877
  Tenant reimbursements.............................    49,368       50,536      143,594      140,030
  Other income......................................     8,750        6,282       27,039       19,689
                                                      --------     --------     --------     --------
     Total revenue..................................   146,396      138,042      429,600      398,297
                                                      --------     --------     --------     --------
EXPENSES:
  Property operating................................    28,406       26,647       79,012       72,623
  Depreciation and amortization.....................    26,606       22,015       77,913       65,212
  Real estate taxes.................................    14,662       13,321       43,026       39,854
  Repairs and maintenance...........................     5,725        5,740       18,265       16,926
  Advertising and promotion.........................     4,366        4,093       13,264       12,013
  Provision for doubtful accounts...................       845         (200)       2,596        2,203
  Other.............................................     2,785        2,235        8,399        8,295
                                                      --------     --------     --------     --------
     Total operating expenses.......................    83,395       73,851      242,475      217,126
                                                      --------     --------     --------     --------
OPERATING INCOME....................................    63,001       64,191      187,125      181,171
INTEREST EXPENSE....................................    41,236       36,468      120,370      112,125
                                                      --------     --------     --------     --------
INCOME BEFORE MINORITY INTEREST.....................    21,765       27,723       66,755       69,046
MINORITY INTEREST...................................      (709)        (605)      (1,884)      (1,940)
GAIN ON SALE OF ASSET...............................        88           --           88        2,350
                                                      --------     --------     --------     --------
INCOME BEFORE UNCONSOLIDATED ENTITIES...............    21,144       27,118       64,959       69,456
INCOME FROM UNCONSOLIDATED ENTITIES.................     1,284         (172)       5,270        3,225
                                                      --------     --------     --------     --------
INCOME BEFORE EXTRAORDINARY ITEMS...................    22,428       26,946       70,229       72,681
EXTRAORDINARY ITEMS -- Losses on extinguishments of
  debt..............................................    (2,530)      (2,636)      (2,795)      (2,884)
                                                      --------     --------     --------     --------
NET INCOME..........................................    19,898       24,310       67,434       69,797
GENERAL PARTNER PREFERRED UNIT REQUIREMENT..........    (2,032)          --       (6,094)          --
                                                      --------     --------     --------     --------
NET INCOME AVAILABLE TO UNITHOLDERS.................  $ 17,866     $ 24,310     $ 61,340     $ 69,797
                                                      ========     ========     ========     ========
NET INCOME AVAILABLE TO UNITHOLDERS ATTRIBUTABLE TO:
  General Partner...................................  $  4,559     $ 14,774     $ 31,125     $ 41,368
  Limited Partners..................................    13,307        9,536       30,215       28,429
                                                      --------     --------     --------     --------
                                                      $ 17,866     $ 24,310     $ 61,340     $ 69,797
                                                      ========     ========     ========     ========
EARNINGS PER UNIT:
  Income before extraordinary items.................  $   0.23     $   0.28     $   0.73     $   0.79
  Extraordinary items...............................     (0.02)       (0.03)       (0.03)       (0.03)
                                                      --------     --------     --------     --------
          Net income................................  $   0.21     $   0.25     $   0.70     $   0.76
                                                      ========     ========     ========     ========
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                        4
<PAGE>   5
 
                           SIMON PROPERTY GROUP, L.P.
 
                CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                      (Unaudited and dollars in thousands)
 
<TABLE>
<CAPTION>
                                                                             FOR THE NINE MONTHS
                                                                             ENDED SEPTEMBER 30
                                                                           -----------------------
                                                                             1996          1995
                                                                           ---------     ---------
<S>                                                                        <C>           <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income...............................................................  $  67,434     $  69,797
Adjustments to reconcile net income to net cash provided by operating
  activities
  Depreciation and amortization..........................................     83,976        71,761
  Losses on extinguishments of debt......................................      2,795         2,888
  Gain on sale of asset..................................................        (88)       (2,350)
  Straight-line rent.....................................................        534        (1,237)
  Minority interest......................................................      1,884         1,940
  Equity in income of unconsolidated entities............................     (5,270)       (3,225)
Changes in assets and liabilities
  Tenant receivables and accrued revenue.................................      4,954         3,727
  Deferred costs and other assets........................................     (4,381)       (9,420)
  Accounts payable, accrued expenses and other liabilities...............     (5,197)       (4,337)
                                                                           ---------     ---------
     Net cash provided by operating activities...........................    146,641       129,544
                                                                           ---------     ---------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Acquisitions...........................................................    (43,941)      (31,155)
  Capital expenditures...................................................    (95,741)      (61,510)
  Cash of consolidated joint ventures....................................      1,695         4,346
  Proceeds from sale of asset............................................        399         2,550
  Investments in unconsolidated entities.................................    (51,907)      (19,696)
  Distributions from unconsolidated entities.............................     34,493         4,274
  Loan repayment from Management Company.................................     38,553            --
                                                                           ---------     ---------
     Net cash used in investing activities...............................   (116,449)     (101,191)
                                                                           ---------     ---------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Partnership contributions..............................................        (62)      142,130
  Minority interest distributions........................................     (3,610)       (2,823)
  Partnership distributions..............................................   (161,582)     (130,643)
  Advances from SDG, L.P.................................................     77,153            --
  Proceeds from borrowings, net of transaction costs.....................    266,048       359,338
  Mortgage, bond and other payments......................................   (226,225)     (428,511)
                                                                           ---------     ---------
     Net cash used in financing activities...............................    (48,278)      (60,509)
                                                                           ---------     ---------
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS.........................    (18,086)      (32,156)
CASH AND CASH EQUIVALENTS, beginning of period...........................     62,721       105,139
                                                                           ---------     ---------
CASH AND CASH EQUIVALENTS, end of period.................................  $  44,635     $  72,983
                                                                           =========     =========
</TABLE>
 
        The accompanying notes are an integral part of these statements.
 
                                        5
<PAGE>   6
 
                           SIMON PROPERTY GROUP, L.P.
 
         NOTES TO UNAUDITED CONSOLIDATED CONDENSED FINANCIAL STATEMENTS
                             (DOLLARS IN THOUSANDS)
 
NOTE 1 -- BASIS OF PRESENTATION
 
     The accompanying consolidated condensed financial statements are unaudited;
however, they have been prepared in accordance with generally accepted
accounting principles for interim financial information and in conjunction with
the rules and regulations of the Securities and Exchange Commission.
Accordingly, they do not include all of the disclosures required by generally
accepted accounting principles for complete financial statements. In the opinion
of management, all adjustments (consisting solely of normal recurring matters)
necessary for a fair presentation of the consolidated condensed financial
statements for these interim periods have been included. The results for the
interim period ended September 30, 1996 are not necessarily indicative of the
results to be obtained for the full fiscal year. These unaudited consolidated
condensed financial statements should be read in conjunction with the December
31, 1995 audited financial statements and notes thereto included in the Simon
Property Group, L.P. Annual Report on Form 10-K/A-1.
 
     The accompanying unaudited consolidated condensed financial statements of
Simon Property Group, L.P. (the "Simon Operating Partnership" or "SPG, LP")
include all the accounts of the Simon Operating Partnership and subsidiaries
entities. Properties which are wholly owned or controlled by the Simon Operating
Partnership have been consolidated. All significant intercompany amounts have
been eliminated.
 
     The Simon Operating Partnership's equity interests in certain partnerships
and joint ventures which represent noncontrolling 14.7% to 50.0% ownership
interests and the investment in M.S. Management Associates, Inc. (together with
its subsidiaries, the "Management Company" -- see Note 7) are accounted for
under the equity method of accounting. These investments are recorded initially
at cost and subsequently adjusted for net equity in income (loss) and cash
contributions and distributions.
 
     Net income is allocated to the partners based on each partner's preferred
unit preference and/or percentage profit interest in the Simon Operating
Partnership during the periods.
 
NOTE 2 -- MERGER
 
     On August 9, 1996, the merger and other related transactions pursuant to
the agreement and plan of merger among Simon DeBartolo Group, Inc. (the
"Company" or "SDG"), an acquisition subsidiary of the Company and DeBartlolo
Realty Corporation ("DRC") were consummated (the "Merger"). Pursuant to the
Merger, the Company acquired all the outstanding shares of common stock of DRC
(55,712,529 shares) through the acquisition subsidiary, at an exchange ratio of
0.68 share of Company common stock for each share of DRC common stock (the
"Exchange Ratio"). DRC and the acquisition subsidiary merged, with DRC as the
surviving entity and becoming a 99.9% subsidiary of the Company. This portion of
the transaction was valued at approximately $923.4 million, based upon the
number of DRC shares of common stock acquired (55,712,529 shares), the Exchange
Ratio and the last reported sales price per share of the Company's common stock
on August 9, 1996 ($24.375). In connection therewith, the Company changed its
name to SDG.
 
     In connection with the Merger, the general and limited partners of the
Simon Operating Partnership, contributed 49.5% (47,442,212 units) of the total
outstanding units of partnership interest in the Simon Operating Partnership, to
the operating partnership of DRC, DeBartolo Realty Partnership, L.P. ("DRP, LP")
in exchange for 47,442,212 units of partnership interest in DRP, LP, whose name
has since been changed to Simon DeBartolo Group, L.P. ("SDG, LP"). SDG retained
a 50.5% partnership interest (48,400,614 units) in the Simon Operating
Partnership, but assigned its rights to receive distributions of profits on
49.5% (47,442,212 units) of the outstanding units of partnership interest in the
Simon Operating Partnership, to SDG, LP. The limited partners of the Simon
Operating Partnership received a 23.7% partnership interest in SDG, LP
(37,282,628 units) for the contribution of their 38.9% partnership interest in
 
                                        6
<PAGE>   7
 
the Simon Operating Partnership (37,282,628 units) to SDG, LP. The interests
transferred by the partners of the Simon Operating Partnership to DRP, LP have
been appropriately reflected at historical costs.
 
     Upon completion of the Merger, SDG became a general partner of SDG, LP and
remained the sole general partner of the Simon Operating Partnership with 1% of
the outstanding partnership units (958,429 units) and 49.5% interest in the
capital of the Simon Operating Partnership, and SDG, LP became a special limited
partner in the Simon Operating Partnership with 49.5% (47,442,212 units) of the
outstanding partnership units in the Simon Operating Partnership and an
additional 49.5% interest in the profits of the Simon Operating Partnership. As
a result of the Merger, the Simon Operating Partnership became a subsidiary of
SDG, LP, with 99% of the profits allocable to SDG, LP and 1% of the profits
allocable to the Company. Cash flows allocable to the Company's 1% profit
interest in SPG, LP will be absorbed by public Company costs and related
expenses incurred by the Company. The accompanying financial statements reflect
the operation of the Simon Operating Partnership on a stand alone basis.
 
     It is currently expected that subsequent to the first anniversary of the
date of the Merger, reorganizational transactions will be effected so that SDG,
LP will directly own all of the assets and partnership interests now owned by
the Simon Operating Partnership. However, there can be no assurance that such
reorganizational transactions will be so affected.
 
     In connection with the Merger, the Management Company purchased from The
Edward J. DeBartolo Corporation all of the voting stock (665 shares of common
stock) of DeBartolo Properties Management, Inc., a DRC management company, for
$2.5 million in cash. SDG, LP continues to hold substantially all of the
economic interest in DeBartolo Properties Management, Inc. SDG holds
substantially all of the economic interest in M.S. Management Associates, Inc.,
while the voting stock are held by the Simons and their affiliates. The Simon
Operating Partnership accounts for its interest in the Management Company
utilizing the equity method.
 
NOTE 3 -- RECLASSIFICATIONS
 
     Certain reclassifications of prior period amounts have been made in the
financial statements to conform to the 1996 presentation.
 
NOTE 4 -- CASH FLOW INFORMATION
 
     Cash paid for interest, net of amounts capitalized, during the nine months
ended September 30, 1996 was $114,811, as compared to $106,734 for the same
period in 1995. Accrued and unpaid distributions as of September 30, 1996 and
December 31, 1995 were $2,031, and $48,594, respectively, which includes accrued
and unpaid distributions on the units of partnership interest entitled to
preferential distribution of cash ("Preferred Units") of $2,031, and $1,490,
respectively.
 
NOTE 5 -- PER UNIT DATA
 
     Per unit data is based on the weighted average number of units of
partnership interest of the Simon Operating Partnership ("Units") outstanding
during the period. As used herein, the term Units does not include Preferred
Units. The weighted average number of Units used in the computation for the
three months ended September 30, 1996 and 1995 was 95,842,853 and 95,196,569,
respectively. The weighted average number of Units used in the computation for
the nine months ended September 30, 1996 and 1995 was 95,783,720 and 91,663,449,
respectively. Additionally, Preferred Units may be converted into common stock
of the Company beginning in October of 1997 at an initial conversion ratio equal
to 0.9524. The Preferred Units have not been included in the computations of per
Unit data, as they do not have a dilutive effect.
 
NOTE 6 -- ACQUISITION
 
     Prior to April 11, 1996, the Simon Operating Partnership held a 50% joint
venture interest in Ross Park Mall in Pittsburgh, Pennsylvania. On April 11,
1996, the Simon Operating Partnership acquired the remaining economic ownership
interest. The purchase price included approximately $44,000 cash and the
assumption of
 
                                        7
<PAGE>   8
 
the joint venture partner's share of existing debt ($57,000). The purchase price
in excess of the net assets acquired of $49,015 was allocated to investment
properties. Effective April 11, 1996, the property is being accounted for using
the consolidated method of accounting. It was previously accounted for using the
equity method of accounting.
 
NOTE 7 -- INVESTMENT IN UNCONSOLIDATED ENTITIES
 
     Summary financial information of partnerships and joint ventures accounted
for using the equity method of accounting and a summary of the Simon Operating
Partnership's investment in and share of income (loss) from such partnerships
and joint ventures follow:
 
<TABLE>
<CAPTION>
                                                                        PARTNERSHIPS AND
                                                                         JOINT VENTURES
                                                                 ------------------------------
                                                                 SEPTEMBER 30,     DECEMBER 31,
                                                                     1996              1995
                                                                 -------------     ------------
    <S>                                                          <C>               <C>
    BALANCE SHEETS
    ASSETS:
      Investment properties at cost, net.......................   $ 1,232,388       $1,156,066
      Cash and cash equivalents................................        36,729           52,624
      Tenant receivables.......................................        35,978           35,306
      Other assets.............................................        31,650           32,626
                                                                  -----------      -----------
         Total assets..........................................   $ 1,336,745       $1,276,622
                                                                  ===========      ===========
    LIABILITIES AND PARTNERS' EQUITY:
      Mortgage and other notes payable.........................   $   540,606       $  410,652
      Accounts payable, accrued expenses and other
         liabilities...........................................        97,056          127,322
                                                                  -----------      -----------
         Total liabilities.....................................       637,662          537,974
         Partners' equity......................................       699,083          738,648
                                                                  -----------      -----------
         Total liabilities and partners' equity................   $ 1,336,745       $1,276,622
                                                                  ===========      ===========
    THE SIMON OPERATING PARTNERSHIP'S SHARE OF:
         Total assets..........................................   $   304,383       $  290,802
                                                                  ===========      ===========
    Partners' equity:
      Investment in partnerships and joint ventures, at
         equity................................................       136,099       $  113,676
      Cash distributions and losses in partnerships and
         joint ventures, at equity.............................       (16,796)         (54,120)
                                                                  -----------      -----------
                                                                  $   119,303       $   59,556
                                                                  ===========      ===========
</TABLE>
 
                                        8
<PAGE>   9
 
<TABLE>
<CAPTION>
                                                         FOR THE THREE
                                                            MONTHS            FOR THE NINE MONTHS
                                                      ENDED SEPTEMBER 30,     ENDED SEPTEMBER 30,
                                                      -------------------     -------------------
                                                            PARTNERSHIPS AND JOINT VENTURES
                                                      -------------------------------------------
                                                       1996        1995        1996        1995
                                                      -------     -------     -------     -------
<S>                                                   <C>         <C>         <C>         <C>
STATEMENTS OF OPERATIONS
REVENUE:
  Minimum rent......................................  $25,742     $19,755     $79,781     $57,606
  Overage rent......................................    1,064         548       2,753       1,678
  Tenant reimbursements.............................   12,569      10,002      40,082      28,651
  Other income......................................    1,170       1,757       7,328      11,064
                                                      -------     -------     -------     -------
     Total revenue..................................   40,545      32,062     129,944      98,999
OPERATING EXPENSES:
  Operating expenses and other......................   15,934      11,019      48,782      32,456
  Depreciation and amortization.....................    9,852       5,310      30,438      15,961
                                                      -------     -------     -------     -------
     Total operating expenses.......................   25,786      16,329      79,220      48,417
                                                      -------     -------     -------     -------
OPERATING INCOME....................................   14,759      15,733      50,724      50,582
INTEREST EXPENSE....................................    8,184       6,648      22,318      21,282
INCOME BEFORE EXTRAORDINARY ITEMS...................    6,575       9,085      28,406      29,300
EXTRAORDINARY ITEMS.................................       --          (9)         --          (9)
                                                      -------     -------     -------     -------
NET INCOME..........................................    6,575       9,076      28,406      29,291
THIRD PARTY INVESTORS' SHARE OF NET INCOME..........    6,617       8,254      25,313      26,060
                                                      -------     -------     -------     -------
SIMON OPERATING PARTNERSHIP'S SHARE OF NET INCOME...  $   (42)    $   822     $ 3,093     $ 3,231
                                                      =======     =======     =======     =======
</TABLE>
 
     The net income or net loss for each partnership and joint venture is
allocated in accordance with the provisions of the applicable partnership or
joint venture agreement. The allocation provisions in these agreements are not
always consistent with the ownership interest held by each general or limited
partner or joint venturer, primarily due to partner preferences.
 
                                        9
<PAGE>   10
 
     Summary financial information of the Management Company accounted for using
the equity method of accounting and a summary of the Simon Operating
Partnership's investment in and share of income from the Management Company
follow:
 
<TABLE>
<CAPTION>
                                                                        MANAGEMENT COMPANY
                                                                   ----------------------------
                                                                   SEPTEMBER 30,   DECEMBER 31,
                                                                       1996            1995
                                                                   -------------   ------------
    <S>                                                            <C>             <C>
    BALANCE SHEETS
    ASSETS:
      Current assets.............................................    $  62,874       $ 40,964
      Undeveloped land and mortgage notes........................       18,245         45,769
      Other assets...............................................       24,889         13,813
                                                                      --------       --------
              Total assets.......................................    $ 106,008       $100,546
                                                                      ========       ========
    LIABILITIES AND SHAREHOLDERS' DEFICIT:
      Current liabilities........................................    $  52,584       $ 18,435
      Notes payable and advances due to the Simon Operating
         Partnership at 11%, due 2008............................       71,028        102,522
                                                                      --------       --------
         Total liabilities.......................................      123,612        120,957
         Shareholders' deficit...................................      (17,604)       (20,411)
                                                                      --------       --------
              Total liabilities and shareholders' deficit........    $ 106,008       $100,546
                                                                      ========       ========
    SIMON OPERATING PARTNERSHIP'S SHARE OF:
              Total assets.......................................    $  94,639       $ 80,437
                                                                      ========       ========
              Shareholders' deficit..............................    $ (18,415)      $(20,612)
                                                                      ========       ========
</TABLE>
 
<TABLE>
<CAPTION>
                                                                  MANAGEMENT COMPANY
                                                      -------------------------------------------
                                                            FOR THE                 FOR THE
                                                      THREE MONTHS ENDED       NINE MONTHS ENDED
                                                         SEPTEMBER 30,           SEPTEMBER 30,
                                                      -------------------     -------------------
                                                       1996        1995        1996        1995
                                                      -------     -------     -------     -------
<S>                                                   <C>         <C>         <C>         <C>
STATEMENTS OF OPERATIONS
REVENUE:
  Management fees...................................  $ 4,952     $ 4,158     $15,122     $15,113
  Development and leasing fees......................    6,480       6,747      10,928      13,140
  Cost-sharing income and other.....................    1,935       1,706       7,237       5,221
                                                      -------     -------     -------     -------
          Total revenue.............................   13,367      12,611      33,287      33,474
EXPENSES:
  Operating expenses................................    7,953      10,747      21,744      24,983
  Depreciation......................................      693         579       1,947       1,679
  Interest..........................................    1,539       1,999       4,690       5,691
                                                      -------     -------     -------     -------
          Total expenses............................   10,185      13,325      28,381      32,353
                                                      -------     -------     -------     -------
NET INCOME (LOSS)...................................    3,182        (714)      4,906       1,121
Intercompany Profits................................   (1,232)         --      (1,232)         --
                                                      -------     -------     -------     -------
Net Income (Loss) after Intercompany Eliminations...    1,950        (714)      3,674       1,121
PREFERRED DIVIDENDS.................................      350         350       1,050       1,015
                                                      -------     -------     -------     -------
NET INCOME (LOSS) AVAILABLE FOR COMMON
  SHAREHOLDERS......................................  $ 1,600     $(1,064)    $ 2,624     $   106
                                                      =======     =======     =======     =======
SIMON OPERATING PARTNERSHIP'S SHARE OF NET INCOME
  (LOSS)............................................  $ 1,326     $  (994)    $ 2,177     $    (6)
                                                      =======     =======     =======     =======
</TABLE>
 
                                       10
<PAGE>   11
 
     The management, development and leasing activities related to the
non-wholly owned and other third-party properties are conducted by the
Management Company.
 
     The Simon Operating Partnership's share of allocated common costs were
$7,524 and $5,685, respectively, for the three-month periods and $21,949 and
$17,704, respectively, for the nine-month periods ended September 30, 1996 and
1995.
 
NOTE 8 -- DEBT
 
     On February 23, 1996, the Simon Operating Partnership borrowed the initial
$100,000 tranche of a $184,000 two-tranche loan facility for the Forum Shops at
Caesar's ("Forum") and retired the existing $89,701 mortgage debt for Forum. The
initial funding bears interest at LIBOR plus 100 basis points and matures in
February 2000. The remaining proceeds of the initial $100,000 tranche are being
used to provide funds for the approximately 250,000-square-foot phase II
expansion of this property.
 
     On April 11, 1996, the Simon Operating Partnership borrowed an additional
$115,000 on its then existing revolving credit facility. The funds were used
primarily to acquire the remaining economic ownership interest in Ross Park Mall
($44,000), and to retire a portion ($54,000) of the existing debt on Ross Park
Mall.
 
     On June 28, 1996, the Simon Operating Partnership obtained an additional
$200,000 unsecured, revolving credit facility. The facility bore interest at
LIBOR plus 132.5 basis points. Terms for the facility were identical to those of
the Simon Operating Partnership's former $400,000 facility.
 
     On September 10, 1996, the Simon Operating Partnership loaned $112 million
to SDG, LP to retire the DeBartolo secured line of credit. The DRC line bore
interest at LIBOR plus 175 basis points.
 
     On September 27, 1996, the Company completed a $200,000 public offering
(the "Preferred Offering") of 8,000,000 shares of 8 3/4% Series B Cumulative
Redeemable Preferred Stock, generating net proceeds of approximately $193,000.
The Company contributed the proceeds of such offering to SDG, LP in exchange for
preferred units in the Operating Partnership, SDG, LP used the net proceeds to
repay $142.8 million of outstanding indebtedness, $12.5 million to acquire
additional ownership interest in North East Mall and loaned $34.4 million to the
Simon Operating Partnership which used the proceeds to reduce amounts
outstanding under its former unsecured credit facilities.
 
     On September 27, 1996, the Operating Partnership obtained a $750,000,
unsecured, three-year credit facility (the "Credit Facility"), which will
initially bear interest at LIBOR plus 90 basis points. The Operating Partnership
borrowed $323 million under this Facility and loaned the proceeds to the Simon
Operating Partnership to retire the outstanding borrowings under its two former
unsecured credit facilities, which bore interest at LIBOR plus 132.5 basis
points.
 
     During the first nine months of 1996, the Simon Operating Partnership drew
an additional $33,246 on its construction loan for Cottonwood Mall in
Albuquerque, New Mexico. As of September 30, 1996, a total of $55,645 was
outstanding on the loan.
 
     On September 6, 1996, SDG, LP filed a shelf registration statement with the
Securities and Exchange Commission to provide for the offering, from time to
time, of up to $750,000 aggregate principal amount of unsecured debt securities
of the Operating Partnership. The Operating Partnership is currently preparing
to offer an aggregate of $200,000 in unsecured debt securities for sale to the
public. The proceeds of which will be used primarily to retire mortgage
indebtedness and to paydown the unsecured, revolving credit facility. The Simon
Operating Partnership will guarantee the due and punctual payment of the
principal of, premium, if any, interest on, and any other amounts payable with
respect to the unsecured debt securities. In December 1995, a shelf registration
statement for $500,000 of non-convertible investment grade debt securities of
SPG,LP became effective. As of September 30, 1996, no securities have been
issued from this registration statement.
 
     At September 30, 1996, the Simon Operating Partnership had consolidated
debt of $2,136,651, of which $1,286,966 was fixed-rate debt and $849,685 was
variable-rate debt. As of September 30, 1996 and December 31, 1995, the Simon
Operating Partnership had interest-rate protection agreements related to
 
                                       11
<PAGE>   12
 
$488,958 and $551,196 of variable-rate debt, respectively. The agreements are
generally in effect until the related variable-rate debt matures. As a result of
the various interest rate protection agreements, interest savings were $415 and
$693 for the three months ended September 30, 1996 and 1995, respectively, and
$1,227 and $2,617 for the nine months ended September 30, 1996 and 1995,
respectively. The Simon Operating Partnership's pro rata share of indebtedness
of the unconsolidated joint venture properties as of September 30, 1996 and
December 31, 1995 was $186,823 and $167,644, respectively.
 
NOTE 9 -- PARTNERS' EQUITY
 
     In connection with the Merger, the general and limited partners of the
Simon Operating Partnership, contributed 49.5% (47,442,212 units) of the total
outstanding units of partnership interest in the Simon Operating Partnership, to
the operating partnership of SDG, L.P. -- the Special Limited Partner in
exchange for 47,442,212 units of partnership interest in SDG, LP. The Company
retained a 50.5% partnership interest (48,400,614 units) in the Simon Operating
Partnership, but assigned its rights to receive distributions of profits on
49.5% (47,442,212 units) of the outstanding units of partnership interest in the
Simon Operating Partnership, to SDG, LP.
 
                                       12
<PAGE>   13
 
     The following table summarizes the change in the Simon Operating
Partnership's partners' equity since December 31, 1995.
 
<TABLE>
<CAPTION>
                                        SPECIAL LIMITED                     GENERAL PARTNER
                                      PARTNERS' INTEREST     ---------------------------------------------  
                                    ----------------------   PREFERRED                                      
                                      UNITS       AMOUNTS      UNITS     AMOUNTS      UNITS       AMOUNTS   
                                    ----------    --------   ---------   -------   -----------   ---------  
<S>                               <C>            <C>         <C>         <C>       <C>            <C>        
Balance at December 31, 1995....            --        --     4,000,000   $99,923    58,360,195    $(686,362)
Stock Incentive Program.........            --        --            --        --       200,030        4,751
Amortization of stock
  incentive.....................            --        --            --        --            --           --
Adjustment to eliminate limited
  partners' equity interest at
  redemption value..............            --        --            --        --                    822,072
Adjustment to allocate net 
  equity of the Operating 
  Partnership...................    94,884,424   167,304            --        --   (57,601,796)    (103,175)
Other...........................            --        --            --        --            --          (62)
Distributions...................            --        --            --    (6,094)           --      (66,554)
Net Income......................            --    10,406            --     6,094            --       31,125
                                    ----------   -------     ---------   -------    ----------    ---------
Balance at September 30, 1996...    94,884,424   177,710     4,000,000   $99,923       958,429    $   1,795
                                    ==========   =======     =========   =======    ==========    =========  



<CAPTION>

                                           UNAMORTIZED                   LIMITED PARTNERS
                                            RESTRICTED                -----------------------
                                           STOCK AWARD      TOTAL        UNITS       AMOUNTS
                                           -----------   ---------   -----------   ---------
<S>                                        <C>          <C>          <C>          <C>
Balance at December 31, 1995...            $ (2,687)    $(589,126)   37,282,628   $ 908,764
Stock Incentive Program..                    (4,751)           --            --          --
Amortization of stock 
  incentive...                                1,563         1,563            --          --
Adjustment to eliminate limited
   partners' equity interest 
  at redemption value...........                 --       822,072            --    (822,072)         
Adjustment to allocate                        
  net equity of the
  Operating Partnership..                        --        64,129   (37,282,628)    (64,129)
Other.................                           --           (62)           --          --
Distributions...                                 --       (72,648)           --     (42,372)
Net Income...                                    --        47,625            --      19,809
                                           --------     ---------   -----------   ---------
Balance at  September 30, 1996...          $ (5,875)    $ 273,553            --   $      --
                                           ========     =========   ===========   =========
</TABLE>


        Because the Simon Operating Partnership did not control whether cash 
would be used to settle the limited partners' exchange rights, the limited
partners' interests in the Simon Operating Partnership should have not been
included in partners' equity. Accordingly, the accompanying consolidated
condensed balance sheet at December<WS>31, 1995 has been retroactively
reclassified to reflect the limited partners' interest in the Simon Operating
Partnership, measured at redemption value. This reclassification results in a
transfer from partners' equity of $908,764 as of December<WS>31, 1995.

        In connection with the merger of the Company and DRC which was 
completed August 9, 1996, the Simon Operating Partnership agreement was 
amended eliminating the exchange rights provision. As a result of the 
elimination of the exchange right provision in connection with the Merger 
transaction, effective August<WS>9, 1996, the limited partners' interests in 
the Simon Operating Partnership have been appropriately included in partners' 
equity.


                                       13

<PAGE>   14
 
STOCK INCENTIVE PROGRAM
 
     On March 22, 1995, an aggregate of 1,000,000 shares of restricted stock was
awarded to 50 executives, subject to the performance standards and other terms
of the Stock Incentive Program. On March 22, 1995 and 1996 the board of
directors of the Company approved the issuances of 144,196 and 200,030 shares of
common stock of the Company, respectively, to the eligible executives. The value
of these shares is being amortized pro-rata over the respective four-year
vesting period. Approximately $1,042 and $525 have been amortized for the
nine-month periods ended September 30, 1996 and 1995, respectively.
 
                                       14
<PAGE>   15
 
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS
 
     Certain statements made in this report may constitute "forward-looking
statements" within the meaning of the Private Securities Litigation Reform Act
of 1995 (the "Reform Act"). Such forward-looking statements involve known and
unknown risks, uncertainties and other factors which may cause the actual
results, performance or achievements of the Operating Partnership to be
materially different from any future results, performance or achievements
expressed or implied by such forward-looking statements. Such factors include,
among others, the following: general economic and business conditions, which
will, among other things, affect demand for retail space or retail goods,
availability and creditworthiness of prospective tenants, lease rents and the
terms and availability of financing; adverse changes in the real estate markets
including, among other things, competition with other companies and technology;
risks of real estate development and acquisition; governmental actions and
initiatives; and environmental/safety requirements.
 
GENERAL BACKGROUND
 
     Simon Property Group L.P. ("SPG, LP" or the "Simon Operating Partnership")
was formed in connection with the initial public offering of Simon Property
Group, Inc. As a result of the merger between a subsidiary of Simon Property
Group, Inc. and DeBartolo Realty Corp. ("DRC"), Simon Property Group, L.P.
became a subsidiary of Simon DeBartolo Group, L.P. ("SDG, LP"). The accompanying
financial statements reflect the operations of Simon Property Group, L.P. on a
stand alone basis.
 
RESULTS OF OPERATIONS
 
     Three property ownership changes (the "Property Transactions") affect the
comparison of the three-month and nine-month periods. Effective July 31, 1995,
the Simon Operating Partnership acquired the remaining 50% interest in
Crossroads Mall and subsequently began including Crossroads in the financial
statements using the consolidated method of accounting. Effective September 25,
1995, the Simon Operating Partnership acquired the remaining 55% interest in
East Towne Mall and subsequently began including East Towne in the financial
statements using the consolidated method of accounting. And finally, on April
11, 1996, the Simon Operating Partnership acquired the remaining 50% economic
interest in Ross Park Mall and subsequently began including Ross Park in the
financial statements using the consolidated method of accounting.
 
For the Three Months Ended September 30, 1996 vs. the Three Months Ended
September 30, 1995
 
     Total revenue increased by $8.4 million or 6.1% for the three months ended
September 30, 1996, as compared to the same period in 1995. This increase is
primarily the result of the Property Transactions ($9.1) million, an increase in
minimum rent ($2.4 million), and a gain on the sale of a peripheral property
($2.6 million), partially offset by a decrease in tenant reimbursements ($4.6
million).
 
     Total operating expenses increased by $9.5 million, or 12.9%, for the three
months ended September 30, 1996 as compared to the same period in 1995. This
increase is primarily a result of the Property Transactions ($4.1 million) and
an increase in depreciation and amortization ($5.0 million).
 
     Interest expense increased by $4.8 million, or 13.1% for the three months
ended September 30, 1996, as compared to the same period in 1995. This increase
is primarily as a result of the Property Transactions ($3.7 million).
 
     Income from unconsolidated entities increased by $1.5 million for the three
months ended September 30, 1996, as compared to the same period in 1995. This
increase is the result of an increase in the Simon Operating Partnership's pro
rata share of income from M.S. Management Associates, Inc. (together with its
subsidiaries, "the Management Company") ($2.3 million), partially offset by a
decrease in income allocated from the nonconsolidated joint venture properties
($0.8 million).
 
     Simon Property Group, Inc.'s (the "Company") preferred unit requirement was
$2.0 million in 1996 as a result of $100 million in net proceeds received in
connection with the Company's issuance of 8 1/8% Series A convertible preferred
stock.
 
                                       15
<PAGE>   16
 
     Net income available to unitholders was $17.9 million for the three months
ended September 30, 1996 as compared to $24.3 million for the same period in
1995, reflecting a decrease of $6.4 million, for the reasons discussed above.
 
For the Nine Months Ended September 30, 1996 vs. the Nine Months Ended September
30, 1995
 
     Total revenue increased by $31.3 million or 7.9% for the nine months ended
September 30, 1996, as compared to the same period in 1995. Of this increase,
$25.1 million is a result of the Property Transactions. The remaining increase
is primarily the result of increases in minimum rent ($5.3 million), lease
settlement income ($2.1 million), and a gain on the sale of peripheral property
($2.6 million), partially offset by a decrease in tenant reimbursements ($5.9
million).
 
     Total operating expenses increased by $25.3 million, or 11.8%, for the nine
months ended September 30, 1996, as compared to the same period in 1995. This
increase is primarily the result of the Property Transactions ($13.8) and an
increase in depreciation and amortization ($8.4 million).
 
     The gain on sale of an asset in the nine months ended September 30, 1995
($2.4 million) relates to the sale of a minority partnership interest in land
previously held for development in Denver, Colorado.
 
     Interest expense increased by $8.2 million or 7.4% for the nine months
ended September 30, 1996, as compared to the same period in 1995. This increase
was primarily the result of the Property Transactions ($9.5 million), partially
offset by interest savings resulting from debt payments made with proceeds
obtained from the Company's secondary common stock offering in April 1995 and
the sale of preferred stock in October 1995.
 
     Income from unconsolidated entities increased by $2.0 million for the nine
months ended September 30, 1996, as compared to the same period in 1995. This
increase is primarily the result of an increase in the Simon Operating
Partnership's pro rata share of income from the Management Company ($2.2
million).
 
     The Company's preferred unit requirement in 1996 was $6.1 million as a
result of $100 million in net proceeds received in connection with the Company's
issuance of 8 1/8% Series A convertible preferred stock.
 
     Net income available to unitholders was $61.3 million for the nine months
ended September 30, 1996, as compared to $69.8 million for the same period in
1995, reflecting a decrease of $8.5 million, for the reasons discussed above.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     At September 30, 1996, the Simon Operating Partnership's balance of cash
and cash equivalents was $44.6 million, not including its proportionate share of
cash held by the joint venture properties and the Management Company. In
addition to its cash reserves, the Simon Operating Partnership had unused
capacity under its unsecured revolving credit facility totaling $427 million.
 
     In December 1995, a shelf registration statement for $500 million of
non-convertible investment grade debt securities of SPG,LP became effective. As
of September 30, 1996, no securities have been issued from this registration
statement.
 
     On September 6, 1996, Simon DeBartolo Group, L.P. ("SDG, LP") filed a
registration statement with the Securities and Exchange Commission to provide
for the offering from time to time of up to $750 million aggregate principal
amount of unsecured debt securities of SDG, LP. SDG, LP intends to offer,
immediately upon effectiveness, an aggregate of $200 million in unsecured debt
securities. The proceeds of which will be used primarily to retire mortgage
indebtedness and to paydown the unsecured, revolving credit facility. SPG,LP
will guarantee the due and punctual payment of the principal of, premium, if
any, interest on, and any other amounts payable with respect to the unsecured
debt securities.
 
     Acquisitions.  On April 11, 1996, the Simon Operating Partnership drew an
additional $115.0 million on its other existing revolving credit facility
primarily to finance the acquisition of the remaining economic ownership
interest in Ross Park Mall ($44 million) and to retire a portion of the
property's debt ($54 million).
 
                                       16
<PAGE>   17
 
     Financing and Refinancing.  On February 23, 1996, the Simon Operating
Partnership borrowed the initial $100.0 million tranche of a $184.0 million
two-tranche loan facility for The Forum Shops at Caesar's ("Forum") and retired
the existing $89.7 million mortgage debt for Forum. The initial funding bears
interest at LIBOR plus 100 basis points and matures in February 2000. The
remaining proceeds are being used to provide funds for the approximately
250,000-square-foot phase II expansion of this property.
 
     On June 28, 1996, the Simon Operating Partnership obtained an additional
$200 million unsecured, revolving credit facility. The facility bore interest at
LIBOR plus 132.5 basis points. Terms for the facility were identical to those of
the Simon Operating Partnership's other $400 million credit facility.
 
     On September 10, 1996, the Simon Operating Partnership loaned $112 million
to SDG, LP to retire the DeBartolo secured line of credit. The DeBartolo line
bore interest at LIBOR plus 175 basis points.
 
     On September 27, 1996, the Company completed a $200 million public offering
(the "Preferred Offering") of 8,000,000 shares of 8 3/4% Series B Cumulative
Redeemable Preferred Stock, generating net proceeds of approximately $193
million. The Company contributed the proceeds of such offering to SDG LP in
exchange for preferred units in the Operating Partnership. SDG LP used the net
proceeds to repay $142.8 million of outstanding mortgage indebtedness and loaned
$46.9 million to the Simon Operating Partnership which used the proceeds to
reduce amounts outstanding under the unsecured credit facilities.
 
     On September 27, 1996, the Operating Partnership obtained a $750 million,
unsecured, three-year credit facility (the "Credit Facility"), which initially
bears interest at LIBOR plus 90 basis points, The Operating Partnership borrowed
$323 million under this facility and loaned the proceeds to the Simon Operating
Partnership to retire the outstanding borrowing under two unsecured credit
facilities, which bore interest at LIBOR plus 132.5 basis points.
 
     During the first nine months of 1996, the Simon Operating Partnership drew
an additional $33.2 million on its construction loan for Cottonwood Mall in
Albuquerque, New Mexico. As of September 30, 1996, a total of $55.6 million was
outstanding on this construction loan.
 
     Development, Expansions and Renovations.  The Simon Operating Partnership
is involved in several development, expansion and renovation efforts.
 
     Groundbreaking has occurred on two new retail development projects.
Grapevine Mills, a 1,450,000-square-foot retail development project in Fort
Worth, Texas, broke ground on July 10, 1996, and is expected to open in November
of 1997. A commitment has been obtained for a four-year $140 million
construction loan with interest at LIBOR plus 165 basis points. The Simon
Operating Partnership will have a $13.9 million equity commitment on this $188
million development project. The Simon Operating Partnership owns 37.5% of this
joint venture development. Arizona Mills, a 1,225,000-square-foot retail
development project in Tempe, Arizona, broke ground on August 1, 1996. This $183
million development opens in November of 1997. The Simon Operating Partnership
has a $11.2 million equity investment and a 25% ownership interest in this joint
venture development.
 
     The Simon Operating Partnership is completing demolition of the existing
Bakery Centre in South Miami, Florida, in preparation for the $130 million
development of The Shops at Sunset Place. Pre-development efforts continue for
this 75%-owned 500,000-square-foot retail and entertainment center.
 
     Cottonwood Mall opened on July 31, 1996, in Albuquerque, New Mexico. This
one million-square-foot regional mall is wholly-owned by the Simon Operating
Partnership. Cottonwood Mall is anchored by Dillard's, Foley's, JCPenney,
Mervyn's and Montgomery Ward, and a 76,000-square foot United Artists STARPORT
entertainment complex, which is scheduled to open by the end of 1996.
 
     Construction also continues on the following projects:
 
     - A 250,000-square-foot phase II expansion of Forum, in which the Simon
       Operating Partnership has a 55% ownership interest, is scheduled to open
       in the fall of 1997. The $90 million costs of the Forum project are being
       funded with a portion of a $184 million two-tranche financing facility
       which closed February 23, 1996.
 
                                       17
<PAGE>   18
 
     - Ontario Mills, a 1.4 million-square-foot value-oriented regional mall in
       Ontario, California, in which the Simon Operating Partnership has a 25%
       ownership interest, is scheduled to open in November of 1996. A $110
       million construction loan on this project has been obtained on this
       approximately $168 million partnership venture with The Mills
       Corporation. The Simon Operating Partnership funded its $15.0 million
       equity commitment for this project in July 1996.
 
     - The Source, a 730,000-square-foot retail development project in Westbury
       (Long Island), New York, is expected to open in August of 1997. This new
       $151 million development will adjoin an existing Fortunoff store. The
       Simon Operating Partnership has a total equity requirement of $31.1
       million for this project. Construction Financing of $120 million closed
       on this property in July of 1996. The loan carries interest at LIBOR plus
       170 basis points and matures on July 16, 1999. The Simon Operating
       Partnership has made a $21.7 million equity investment in this 50%-owned
       joint venture development through September 30, 1993.
 
     - The Tower Shops in Las Vegas, Nevada, is an approximately $25 million,
       89,000-square-foot retail development project in which the Simon
       Operating Partnership owns a 50% interest. This retail development is
       scheduled to open late in the fall of 1996. The Simon Operating
       Partnership contributed its $3.2 million equity commitment in April of
       1996.
 
     Management is also considering renovation and expansion projects at various
other properties. It is anticipated that these projects will be financed
principally with external borrowings, existing corporate credit facilities and
cash flows from operations.
 
     Debt. At September 30, 1996, the Simon Operating Partnership had
consolidated debt of $2,136.6 million, of which $1,287.0 million is fixed-rate
debt and $849.6 million is variable-rate debt. As of September 30, 1996 and
1995, the Simon Operating Partnership had interest-rate protection agreements
relating to $488,958 and $551,196 of variable-rate debt, respectively. The
agreements are generally in effect until the related variable-rate debt matures.
 
     The Simon Operating Partnership's ratio of consolidated debt-to-market
capitalization was approximately 45.6% at September 30, 1996.
 
     Distributions. The Simon Operating Partnership declared a distribution of
$0.4925 per Unit for the first three quarters of 1996. In addition, a special
distribution of $0.1515 per unit was declared on August 9, 1996 to align the
time periods of distributions for the Company and DeBartolo Realty Corporation
under the definitive merger agreement. Future distributions will be determined
based on actual results of operations and cash available for distribution.
Preferred distributions of $0.5078 per Preferred Unit were also declared per
quarter during this period.
 
     Capital Resources. Management anticipates that cash generated from
operating performance will provide the necessary funds on a short- and long-term
basis for its operating expenses, interest expense on outstanding indebtedness,
recurring capital expenditures and distributions to holders of Preferred Units
and Units.
 
     Management continues to actively review and evaluate property acquisition
opportunities. Management believes that funds on hand and amounts available
under the Operating Partnership's unsecured revolving credit facility, together
with the ability to issue shares of common stock of the Company and/or Units,
provide the means to finance certain acquisitions. No assurance can be given
that the Simon Operating Partnership will not be required to, or will not elect
to, even if not required to, obtain funds from outside sources, including
through the sale of debt or equity securities, to finance significant
acquisitions, if any.
 
     Investing and Financing Activities. Cash used in investing activities for
the nine months ended September 30, 1996 was $116.4 million. Cash used in
investing activities included approximately $44 million for the acquisition of
the remaining economic ownership interest in Ross Park Mall, tenant allowances,
capital expenditures and development related costs of $95.7 million including
$31.3 million, $11.7 million and $4.3 million at Cottonwood Mall, Forum, and The
Shops at Sunset Place, respectively; and advances to unconsolidated joint
ventures totaling approximately $51.9 million, including $18.9 million, $15.0
million,
 
                                       18
<PAGE>   19
 
$5.7 million and $3.2 million in equity contributions made to The Source,
Ontario Mills, Arizona Mills and The Tower Shops, respectively, to fund
development activity. Cash received from unconsolidated entities of $34.5
million included a $30.9 million return of equity from Smith Haven Mall, a note
repayment was received from M.S. Management Associates, Inc., ($38.6 million).
Cash used in investing activities for the nine months ended September 30, 1995
included $61.5 million for tenant allowances, capital expenditures and
development related costs, a $14.6 million equity investment in Rolling Oaks
Mall and $3.1 million for the acquisition of a joint venture interest in a
parcel of land to be held for development in Little Rock, Arkansas, partially
offset by $2.6 million of net proceeds from the sale of a joint venture interest
in land held for development, distributions from unconsolidated entities ($4.3
million) and cash of $3.4 million included in the acquisition of interest in
White Oaks Mall.
 
     Cash used in financing activities for the nine months ended September 30,
1996 was $12.2 million less than the nine months ended September 30, 1995. The
decrease in cash used in 1996 as compared to 1995 was primarily the result of an
increase in net mortgage borrowings of $109.0 million and an advance from SDG,
LP ($77.2 million), partially offset by an increase of $30.9 million in
distributions to Unitholders (including $5.5 million paid to the holder of the
Preferred Units representing distributions from October 27, 1995 to September
30, 1996) and proceeds from sales of common stock in 1995 of $142.1 million.
 
EBITDA -- EARNINGS FROM OPERATING RESULTS BEFORE INTEREST, TAXES, DEPRECIATION
AND AMORTIZATION
 
     Management believes that there are several important factors that
contribute to the ability of the Simon Operating Partnership to increase rent
and improve profitability of its shopping centers, including aggregate tenant
sales volume, sales per square foot, occupancy levels and tenant costs. Each of
these factors has a significant effect on EBITDA. Management believes that
EBITDA is an effective measure of shopping center operating performance because:
(i) it is industry practice to evaluate real estate properties based on
operating income before interest, taxes, depreciation and amortization, which is
generally equivalent to EBITDA; and (ii) EBITDA is unaffected by the debt and
equity structure of the property owner. EBITDA: (i) does not represent cash flow
from operations as defined by generally accepted accounting principles; (ii)
should not be considered as an alternative to net income as a measure of the
Simon Operating Partnership's operating performance; (iii) is not indicative of
cash flows from operating, investing and financing activities; and (iv) is not
an alternative to cash flows as a measure of the Simon Operating Partnership's
liquidity.
 
     Total EBITDA for the portfolio properties increased from $315.3 million for
the nine months ended September 30, 1995 to $346.2 million for the same period
in 1996, representing a growth rate of 9.8%. This increase is primarily
attributable to the malls opened or acquired during 1995 and 1996. During this
period, operating profit margin decreased from 63.1% to 61.9%.
 
FFO -- FUNDS FROM OPERATIONS
 
     FFO, as defined by the National Association of Real Estate Investment
Trusts ("NAREIT"), means the combined net income of the Simon Operating
Partnership and its subsidiaries without giving effect to depreciation and
amortization, gains or losses from extraordinary items, gains or losses on sales
of real estate, gains or losses on investments in marketable securities and any
provision/benefit for income taxes for such period, plus the allocable portion,
based on the Simon Operating Partnership's ownership interest, of funds from
operations of unconsolidated joint ventures, all determined on a consistent
basis in accordance with generally accepted accounting principles. Management
believes that FFO is an important and widely used measure of the operating
performance of REITs which provides a relevant basis for comparison among REITs.
FFO is presented to assist investors in analyzing the performance of the
Operating Partnership. FFO: (i) does not represent cash flow from operations as
defined by generally accepted accounting principles; (ii) should not be
considered as an alternative to net income as a measure of the Simon Operating
Partnership's operating performance or to cash flows from operating, investing
and financing activities; and (iii) is not an alternative to cash flows as a
measure of the Simon Operating Partnership's liquidity. In March, 1995, NAREIT
modified its definition of FFO. The modified definition provides that
amortization of deferred financing costs and depreciation of non-rental real
estate assets are no longer to be added back to net income in arriving at FFO.
The modified definition was adopted by the Simon Operating Partnership beginning
in
 
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<PAGE>   20
 
1996. Additionally, the prior year FFO is being restated to reflect the new
definition in order to make the amounts comparative. Under the previous
definition, FFO for the three months and nine months ended September 30, 1995,
would have been $52.3 million and $145.4 million, respectively.
 
     The following summarizes FFO and reconciles net income to FFO for the
periods presented:
 
<TABLE>
<CAPTION>
                                                          FOR THE                  FOR THE
                                                    THREE MONTHS ENDED        NINE MONTHS ENDED
                                                       SEPTEMBER 30,            SEPTEMBER 30,
                                                    -------------------     ---------------------
                                                     1996        1995         1996         1995
                                                    -------     -------     --------     --------
                                                                   (IN THOUSANDS)
<S>                                                 <C>         <C>         <C>          <C>
FFO...............................................  $48,977     $49,492     $148,189     $137,287
                                                    =======     =======     ========     ========
Reconciliation:
  Net Income......................................  $19,899     $24,310     $ 67,434     $ 69,797
Plus:
  Extraordinary items -- Losses on extinguishments
     of debt......................................    2,424       2,636        2,689        2,884
     Depreciation and amortization from
       consolidated properties....................   26,469      21,894       77,507       64,855
     The Simon Operating Partnership's share of
       depreciation and amortization from
       unconsolidated affiliates..................    2,783       1,329        8,733        4,340
Less:
  Gain on sale of asset...........................      (88)        N/A          (88)      (2,350)
  Minority interest portion of depreciation and
     amortization.................................     (478)       (677)      (1,992)      (2,239)
Preferred distributions...........................   (2,032)         --       (6,094)          --
                                                    -------     -------     --------     --------
FFO...............................................  $48,977     $49,492     $148,189     $137,287
                                                    =======     =======     ========     ========
</TABLE>
 
PORTFOLIO DATA
 
     Aggregate Tenant Sales Volume.  For the nine months ended September 30,
1995 compared to the same period in 1996, total reported retail sales for mall
and freestanding stores at the regional malls and all stores at the community
shopping centers for GLA owned by the Simon Operating Partnership ("Owned GLA")
increased 8.2% from $3,010 million to $3,256 million. Retail sales at Owned GLA
affect revenue and profitability levels because they 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.) the
tenants can afford to pay.
 
     Occupancy Levels.  Occupancy levels for regional malls increased from 85.2%
at September 30, 1995 to 85.6% at September 30, 1996. Occupancy levels for
community shopping centers decreased from 94.8% at September 30, 1995 to 93.1%
at September 30, 1996. These decreases are the result of store closings by
several retailers which filed bankruptcy in 1995 and the de-leasing efforts at
two malls in anticipation of de-malling these properties. Total GLA has
increased 3.7 million square feet from September 30, 1995 to September 30, 1996,
primarily as a result of the 1995 opening of three new regional malls, the
acquisition of Smith Haven Mall and the opening of Cottonwood Mall.
 
     Average Base Rents.  Average base rents per square foot of mall and
freestanding stores at regional mall Owned GLA increased 6.3%, from $18.51 to
$19.68 as of September 30, 1996 as compared to September 30, 1995. In community
shopping centers, average base rents per square foot of Owned GLA increased
3.3%, from $7.25 to $7.49 during this same period.
 
                                       20
<PAGE>   21
 
INFLATION
 
     Inflation has remained relatively low during the past three years and has
had a minimal impact on the operating performance of the portfolio properties.
Nonetheless, substantially all of the tenants' leases contain provisions
designed to lessen the impact of inflation. Such provisions include clauses
enabling the Simon Operating Partnership to receive percentage rentals based on
tenants' gross sales, which generally increase as prices rise, and/or escalation
clauses, which generally increase rental rates during the terms of the leases.
In addition, many of the leases are for terms of less than ten years, which may
enable the Simon Operating Partnership to replace existing leases with new
leases at higher base and/or percentage rentals if rents of the existing leases
are below the then-existing market rate. Substantially all of the leases, other
than those for anchors, require the tenants to pay a proportionate share of
operating expenses, including common area maintenance, real estate taxes and
insurance, thereby reducing the Simon Operating Partnership's exposure to
increases in costs and operating expenses resulting from inflation.
 
     However, inflation may have a negative impact on some of the Simon
Operating Partnership's other operating items. Interest and general and
administrative expenses may be adversely affected by inflation as these
specified costs could increase at a rate higher than rents. Also, for tenant
leases with stated rent increases, inflation may have a negative effect as the
stated rent increases in these leases could be lower than the increase in
inflation at any given time.
 
OTHER
 
     The shopping center industry is seasonal in nature, particularly in the
fourth quarter during the holiday season, when tenant occupancy and retail sales
are typically at their highest levels. In addition, shopping malls achieve most
of their temporary tenant rents during the holiday season. As a result of the
above, earnings are generally highest in the fourth quarter of each year.
 
     Management recognizes the retail industry is cyclical in nature and some
tenants continue to experience difficulties, which is reflected in sales trends
and in the bankruptcies and continued restructuring of several prominent retail
organizations. Continuation of these trends could impact future earnings
performance.
 
                                       21
<PAGE>   22
 
PART II -- OTHER INFORMATION
 
ITEM 1.  LEGAL PROCEEDINGS
 
     Neither the Registrant nor any of the portfolio properties is currently a
party to any material pending legal proceedings nor, to management's knowledge,
is any material legal proceeding currently contemplated by governmental
authorities against the Registrant or the portfolio properties. The entities
that own portfolio properties are parties to a variety of routine litigation
arising in the ordinary course of business. Most of such proceedings are covered
by liability insurance. All of such proceedings, taken together, are not
expected to have a material adverse effect on the Registrant's operating
financial results.
 
ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K
 
     (a) Exhibits -- None.
 
     (b) Reports on Form 8-K -- One form 8-K was filed during the current period
on August 26, 1996, and as further amended on August 28 and October 21, 1996.
Under Item 2 -- Acquisition or Disposition of Assets, the Registrant reported
the Merger, which occurred on August 9, 1996. Additionally, under Item 7, the
Registrant presented the financial statements of DeBartolo Realty Partnership,
LP, and pro forma financial information of the combined entities.
 
                                       22
<PAGE>   23
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.
 
                                          SIMON PROPERTY GROUP, L.P.
                                          By: SIMON DEBARTOLO GROUP, INC.
                                            General Partner
Date: November 19, 1996
 
<TABLE>
<S>                        <C>
                                        /s/  JAMES M. BARKLEY
                           -----------------------------------------------
                                          James M. Barkley,
                                      Secretary/General Counsel
</TABLE>
 
                                       23