U.S. SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
Form 4
STATEMENT OF CHANGES IN
BENEFICIAL OWNERSHIP
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(f)
of the Investment Company Act of 1940
1. Name and Address of Reporting Person
J.R. Simplot Self-
Declaration of Revocable Trust
999 Main Street
Boise, ID 83702
2. Issuer Name and Ticker or Trading Symbol
USG Corporation (USG)
3. IRS or Social Security Number of Reporting Person
(Voluntary)
4. Statement for Month/Year
November 1999
5. If Amendment, Date of Original (Month/Year)
6. Relationship of Reporting Person to Issuer
(Check all applicable)
[__] Director
[_X] 10% Owner
[__] Officer (give title below)
[__] Other (specify below)
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TABLE I - NON-DERIVATIVE SECURITIES ACQUIRED,
DISPOSED OF, OR BENEFICIALLY OWNED
1. Title of Security (Instr. 3)
Common Stock
2. Transaction Date (Month/Day/Year)
11/17/99
11/18/99
11/19/99
11/22/99
11/23/99
3. Transaction Code (Instr. 8)
Code P
Code P
Code P
Code P
Code P
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
Amount (A) or (D) Price
69,100 A 50.392
205,600 A 51.448
161,100 A 51.269
126,200 A 51.8855
23,800 A 51.984
5. Amount of Securities Beneficially Owned at End of Month
(Instr. 3 and 4)
5,645,100
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)
D - 5,545,100 I - 100,000
7. Nature of Indirect Beneficial Ownership (Instr. 4)
As director of J.R. Simplot Foundation (beneficial
ownership is disclaimed)
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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)
4. Transaction Code (Instr. 8)
Code
5. Number of Derivative Securities Acquired (A) or Disposed
of (D) (Instr. 3, 4 and 5)
(A) (D)
6. Date Exercisable and Expiration Date (Month/Day/Year)
Date Exercisable Expiration Date
7. Title and Amount of Underlying Securities (Instr. 3 and 4)
Title Amount of Number of Shares
8. Price of Derivative Security (Instr. 5)
9. Number of Derivative Securities Beneficially Owned at
End of Month (Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or
Indirect (I) (Instr. 4)
11. Nature of Indirect Beneficial Ownership (Instr. 4)
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Explanation of Responses:
Date: December 9, 1999 J.R. Simplot
Self-Declaration of Revocable Trust
By //s// J.R. Simplot
-----------------------------------
J.R. Simplot, as Trustee
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