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

                               ------------------

                                  SCHEDULE TO/A
            TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                               (Amendment No. 40)
                              TAUBMAN CENTERS, INC.
                       (Name of Subject Company (Issuer))
                        SIMON PROPERTY ACQUISITIONS, INC.
                           SIMON PROPERTY GROUP, INC.
                             WESTFIELD AMERICA, INC.
                      (Names of Filing Persons (Offerors))
                     COMMON STOCK, PAR VALUE $.01 PER SHARE
                         (Title of Class of Securities)
                                    876664103
                      (CUSIP Number of Class of Securities)

  James M. Barkley, Esq.                                Peter R. Schwartz, Esq.
Simon Property Group, Inc.                              Westfield America Inc.
   National City Center                                11601 Wilshire Boulevard
115 West Washington Street                                    12th Floor
      Suite 15 East                                      Los Angeles, CA 90025
  Indianapolis, IN 46024                               Telephone: (310) 445-2427
Telephone: (317) 636-1600
                 (Name, Address and Telephone Numbers of Person
  Authorized to Receive Notices and Communications on Behalf of Filing Persons)

                               ------------------

                                   Copies to:
 Steven A. Seidman, Esq.                         Scott V. Simpson, Esq.
 Robert B. Stebbins, Esq.               Skadden, Arps, Slate, Meagher & Flom LLP
 Willkie Farr & Gallagher                           One Canada Square
    787 Seventh Avenue                                Canary Wharf
 New York, New York 10019                       London, E14 5DS, England
Telephone: (212) 728-8000                     Telephone: (44) 20 7519 7000

                               ------------------

                                 CALCULATION OF
                                   FILING FEE


================================================================================
         TRANSACTION VALUATION*                    AMOUNT OF FILING FEE**
---------------------------------------  ---------------------------------------
                                      
            $1,160,416,360                               $232,083.27
================================================================================

*        Estimated for purposes of calculating the amount of the filing fee
         only. Calculated by multiplying $20.00, the per share tender offer
         price, by 58,020,818 shares of Common Stock, consisting of (i)
         49,343,395 outstanding shares of Common Stock, (ii) 2,270 shares of
         Common Stock issuable upon conversion of 31,784,842 outstanding shares
         of Series B Non-Participating Convertible Preferred Stock, (iii)
         7,202,785 shares of Common Stock issuable upon conversion of
         outstanding partnership units of The Taubman Realty Group, Limited
         Partnership ("TRG") and (iv) 1,472,368 shares of Common Stock issuable
         upon conversion of outstanding options (each of which entitles the
         holder thereof to purchase one partnership unit of TRG which, in turn,
         is convertible into one share of Common Stock), based on Amendment No.
         2 to the Registrant's Preliminary Revocation Solicitation Statement on
         Schedule 14A filed on May 14, 2003, the Registrant's Schedule 14D-9
         filed on December 11, 2002, the Registrant's Annual Report on Forms
         10-K and 10-K/A for the year ended December 31, 2002 and the
         Registrant's Quarterly Report on Form 10-Q for the quarter ended June
         30, 2003.

**       The amount of the filing fee calculated in accordance with Regulation
         240.0-11 of the Securities Exchange Act of 1934, as amended, equals
         1/50th of one percent of the value of the transaction.


/X/      Check the box if any part of the fee is offset as provided by Rule
         0-11(a)(2) and identify the filing with which the offsetting fee was



         previously paid. Identify the previous filing by registration statement
         number, or the Form or Schedule and the date of its filing.


                                                                
Amount Previously Paid:     $248,745.11                            Filing Party:  Simon Property Group, Inc.; Simon Property
Form or Registration No.:   Schedule TO (File No. 005-42862),                     Acquisitions, Inc.; Westfield America, Inc.
                            Amendment No. 1 to the Schedule TO     Date Filed:    December 5, 2002, December 16, 2002 and
                            and Amendment No. 5 to the Schedule TO                January 15, 2003


/ /      Check the box if the filing relates solely to preliminary
         communications made before the commencement of a tender offer.

/ /      Check the appropriate boxes below to designate any transactions to
         which the statement relates.

         /X/      third-party tender offer subject to Rule 14d-1.

         / /      issuer tender offer subject to Rule 13e-4.

         / /      going-private transaction subject to Rule 13e-3.

         / /      amendment to Schedule 13D under Rule 13d-2.

         Check the following box if the filing is a final amendment reporting
the results of the tender offer: / /

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                                   SCHEDULE TO

         This Amendment No. 40 amends and supplements the Tender Offer Statement
on Schedule TO originally filed with the Securities and Exchange Commission (the
"Commission") on December 5, 2002 (as amended and supplemented, the "Schedule
TO") relating to the offer by Simon Property Acquisitions, Inc., a Delaware
corporation (the "Purchaser") and wholly owned subsidiary of Simon Property
Group, Inc., a Delaware corporation ("SPG Inc."), to purchase all of the
outstanding shares of common stock, par value $.01 per share (the "Shares"), of
Taubman Centers, Inc. (the "Company") at a purchase price of $20.00 per Share,
net to the seller in cash, without interest thereon, upon the terms and subject
to the conditions set forth in the Offer to Purchase, dated December 5, 2002
(the "Offer to Purchase"), and the Supplement to the Offer to Purchase, dated
January 15, 2003 (the "Supplement"), and in the related revised Letter of
Transmittal (which, together with any supplements or amendments, collectively
constitute the "Offer"). This Amendment No. 40 to the Schedule TO is being filed
on behalf of the Purchaser, SPG Inc. and Westfield America, Inc. ("WEA").

         Capitalized terms used and not defined herein shall have the meanings
assigned to such terms in the Offer to Purchase, the Supplement and the Schedule
TO, as applicable.

         The item numbers and responses thereto below are in accordance with the
requirements of Schedule TO.

Item 11. ADDITIONAL INFORMATION.

         On September 2, 2003, SPG Inc., the Purchaser and WEA announced that
         approximately 64% of the Company's Common Stock had been tendered into
         the Offer as of August 29, 2003 and that the Expiration Date of the
         Offer has been extended to 12:00 midnight, New York City time, on
         October 3, 2003. The full text of a press release, dated September 2,
         2003, issued by SPG Inc. and WEA with respect to such announcement is
         filed herewith as Exhibit (a)(5)(NNN).


Item 12. EXHIBITS.

(a)(5)(NNN)  Press release issued by Simon Property Group, Inc. and Westfield
             America, Inc., dated September 2, 2003.



                                    SIGNATURE

                  After due inquiry and to the best of their knowledge and
belief, the undersigned hereby certify as of September 2, 2003 that the
information set forth in this statement is true, complete and correct.


                                    SIMON PROPERTY GROUP, INC.

                                    By:   /s/ James M. Barkley
                                       ------------------------------------
                                        Name:    James M. Barkley
                                        Title:   Secretary and General Counsel


                                    SIMON PROPERTY ACQUISITIONS, INC.

                                    By:   /s/ James M. Barkley
                                       ------------------------------------
                                        Name:    James M. Barkley
                                        Title:   Secretary and Treasurer



                  After due inquiry and to the best of its knowledge and belief,
the undersigned hereby certifies as of September 2, 2003 that the information
set forth in this statement is true, complete and correct.


                                    WESTFIELD AMERICA, INC.

                                    By: /s/ Peter R. Schwartz
                                        -------------------------------
                                         Name: Peter R. Schwartz
                                         Title: Senior Executive Vice President



                                  EXHIBIT INDEX




EXHIBIT NO.                               DESCRIPTION
-----------       --------------------------------------------------------------
               
(a)(5)(NNN)       Press release issued by Simon Property Group, Inc. and
                  Westfield America, Inc., dated September 2, 2003.