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

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(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.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

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

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.