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 * BERKSHIRE HATHAWAY INC   2. Issuer Name and Ticker or Trading Symbol USG CORP [USG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1440 KIEWIT PLAZA 3. Date of Earliest Transaction (Month/Day/Year) 08/03/2006 (Street) OMAHA, NE 68131 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ 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 08/03/2006   P   692,500 (1) A $ 45.46 14,161,774 (1) (2) I See footnotes (1) (2)

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BERKSHIRE HATHAWAY INC 1440 KIEWIT PLAZA OMAHA, NE 68131		X
BUFFETT WARREN E 1440 KIEWIT PLAZA OMAHA, NE 68131		X
OBH INC 1440, KIEWIT PLAZA OMAHA, NE 68131		X
NATIONAL INDEMNITY CO 3024 HARNEY ST. OMAHA, NE 68131		X

Signatures

/s/ Marc D. Hamburg on behalf of Berkshire Hathaway Inc.		08/04/2006
**Signature of Reporting Person		Date
/s/ Warren E. Buffett		08/04/2006
**Signature of Reporting Person		Date
/s/ Mark Millard on behalf of National Indemnity Co.		08/04/2006
**Signature of Reporting Person		Date
/s/ Marc D. Hamburg on behalf of OBH, Inc.		08/04/2006
**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)	These shares are owned by National Indemnity Company ("NICO"), a subsidiary of Berkshire Hathaway Inc. ("Berkshire").
(2)	As Berkshire and OBH, Inc. ("OBH"), a subsidiary to Berkshire, are each in the chain of ownership of NICO, each of Berkshire and OBH may be deemed presently to both beneficially own and have a pecuniary interest in all shares of USG Corporation ("USG") common stock presently owned by NICO. Warren E. Buffett, as controlling shareholder of Berkshire, may be deemed presently to beneficially own, but only to the extent he has a pecuniary interest in, the shares of USG common stock presently owned by NICO. Mr. Buffett disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

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