Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
YORK M DENISE DEBARTOLO
  2. Issuer Name and Ticker or Trading Symbol
SIMON PROPERTY GROUP INC /DE/ [SPG]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
7620 MARKET STREET
3. Date of Earliest Transaction (Month/Day/Year)
12/22/2004
(Street)

YOUNGSTOWN, OH 44512
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 12/22/2004   M   3,000 A $ 25.5 12,616 D  
Common Stock 12/22/2004   M   3,000 A $ 29.625 15,616 D  
Common Stock 12/22/2004   M   3,000 A $ 26.0313 18,616 D  
Common Stock 12/22/2004   M   3,000 A $ 25.76 21,616 D  
Common Stock 12/22/2004   M   3,000 A $ 33.675 24,616 D  
Common Stock 12/23/2004   S   1,100 D $ 64.85 23,516 D  
Common Stock 12/23/2004   S   700 D $ 64.83 22,816 D  
Common Stock 12/23/2004   S   200 D $ 64.82 22,616 D  
Common Stock 12/23/2004   S   100 D $ 64.81 22,516 D  
Common Stock 12/23/2004   S   900 D $ 64.8 21,616 D  
Common Stock 12/23/2004   S   3,700 D $ 64.64 17,916 D  
Common Stock 12/23/2004   S   700 D $ 64.62 17,216 D  
Common Stock 12/23/2004   S   100 D $ 64.6 17,116 D  
Common Stock 12/23/2004   S   200 D $ 64.59 16,916 D  
Common Stock 12/23/2004   S   900 D $ 64.55 16,016 D  
Common Stock 12/23/2004   S   1,600 D $ 64.52 14,416 D  
Common Stock 12/23/2004   S   200 D $ 64.53 14,216 D  
Common Stock 12/23/2004   S   1,600 D $ 64.54 12,616 D  
Common Stock 12/23/2004   S   1,000 D $ 64.66 11,616 D  
Common Stock 12/23/2004   S   100 D $ 64.47 11,516 D  
Common Stock 12/23/2004   S   800 D $ 64.42 10,716 D  
Common Stock 12/23/2004   S   1,100 D $ 64.43 9,616 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Simon Property Group, Inc. ("SPG Units") (1) (2) 12/23/2004   C     103,624 08/10/1996   (4) Common Stock, $.0001 par value 103,624 $ 64.57 1,186,815 D  
Director Option (3) $ 25.5 12/22/2004   M     3,000 03/01/2000 03/01/2009 Common Stock 3,000 $ 25.5 12,000 D  
Director Option (3) $ 29.625 12/22/2004   M     3,000 05/12/2000 05/12/2009 Common Stock 3,000 $ 29.625 9,000 D  
Director Option (3) $ 26.0313 12/22/2004   M     3,000 05/10/2001 05/10/2010 Common Stock 3,000 $ 26.0313 6,000 D  
Director Option (3) $ 25.76 12/22/2004   M     3,000 05/08/2002 05/08/2011 Common Stock 3,000 $ 25.76 3,000 D  
Director Option (3) $ 33.675 12/22/2004   M     3,000 05/08/2003 05/08/2012 Common Stock 3,000 $ 33.675 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
YORK M DENISE DEBARTOLO
7620 MARKET STREET
YOUNGSTOWN, OH 44512
  X      

Signatures

 M. Denise DeBartolo York, and her attorney-in-fact, Shelly Doran   12/22/2004
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The reporting person elected to exchange 103,624 units of limited partnership interest ("Units") of Simon Property Group, L.P., of which the issuer is the general partner. Units may be exchanged for an equal number of shares of the issuer's common stock, or cash, as selected by the issuer. The issuer elected to pay cash for the exchanged Units.
(2) 1:1
(3) Right to Buy
(4) None

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