USG CORP
11-K, 1994-03-30
CONCRETE, GYPSUM & PLASTER PRODUCTS
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                      SECURITIES AND EXCHANGE COMMISSION


                            Washington, D.C.  20549



                                   FORM 11-K

                                 ANNUAL REPORT


                       Pursuant to Section 15(d) of the 
                        Securities Exchange Act of 1934



(Mark one)


 X    Annual Report pursuant to 15(d) of the Securities Exchange Act of 1934
(Fee required)

   For the fiscal year ended December 31, 1993.
                                      OR
      Transition report pursuant to Section 15(d) of the Securities Exchange
Act of 1934 (No fee required)

   For the transition period from                 to              

   Commission file number 1-8864.

   A.  Full title of the Plan:

        USG CORPORATION INVESTMENT PLAN (Formerly USG CORPORATION        
INVESTMENT PLAN FOR SALARIED EMPLOYEES)

   B.  Name of the issuer of the securities held pursuant to the plan and the
address of its principal executive office:

        USG CORPORATION, 125 SOUTH FRANKLIN STREET, CHICAGO, ILLINOIS  60606



                             REQUIRED INFORMATION


Financial Statements:

Plan financial statements and schedules prepared in accordance with the
financial reporting requirements of ERISA attached hereto, including a Consent
of Independent Public Auditors with respect to Form S-8 for 1993.



      Pursuant to the requirements of the Securities and Exchange Act of 1934,
the members of the Pension and Investment Committee administering the Plan
have duly caused this annual report to be signed by the undersigned thereunto
duly authorized.


                                    USG CORPORATION INVESTMENT PLAN


                              
                                    By: /s/
                                       H. E. Pendexter, Jr.
                                       Member of Pension and Investment
                                       Committee


Date: March 29, 1994

















				 USG CORPORATION
				 INVESTMENT PLAN


				REPORT ON AUDITED
			    FINANCIAL STATEMENTS AND
			     SUPPLEMENTAL SCHEDULES


		     YEARS ENDED DECEMBER 31, 1993 AND 1992
<PAGE>
<PAGE>






				TABLE OF CONTENTS


							       PAGE

   INDEPENDENT AUDITORS' REPORT                                 1          

   FINANCIAL STATEMENTS:

	Statement of Net Assets Available
	  for Plan Benefits                                     2          

	Statement of Changes in Net Assets
	  Available for Plan Benefits                           4          

	Notes to Financial Statements                           6          


   SUPPLEMENTAL SCHEDULES:

	I.  Schedule of Investments Held
	     at Year End                                       12          

	II.  Schedule of Reportable Transactions               13          
<PAGE>
<PAGE>
			      HILL, TAYLOR & CO.
			 CERTIFIED PUBLIC ACCOUNTANTS
		     116 SOUTH MICHIGAN AVE - 11TH FLOOR
			  CHICAGO, ILLINOIS  60603
				312/332-4964
			  FAX:  312/332-0181


			  INDEPENDENT AUDITORS' REPORT

PENSION AND INVESTMENT COMMITTEE
USG CORPORATION
CHICAGO, ILLINOIS

We have audited the accompanying statement of net assets available for plan
benefits of the USG Corporation Investment Plan as of December 31, 1993 and
1992, and the related statement of changes in net assets available for plan
benefits for the years then ended.  These financial statements are the
responsibility of the Plan's management.  Our responsibility is to express an
opinion on these statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards.  Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement.  An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements.  An audit
also includes assessing the accounting principles used and significant
estimates made by management as well as evaluating the overall financial
statement presentation.  We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the net assets available for plan benefits of the Plan
as of December 31, 1993 and 1992, and the changes in net assets available for
plan benefits for the years then ended in conformity with generally accepted
accounting principles.

Our audits were made for the purpose of forming an opinion on the basic
financial statements taken as a whole.  The supplemental schedules of
investments held at year end as of December 31, 1993, and reportable
transactions for the year ended December 31, 1993, are presented for purposes
of complying with the Department of Labor's Rules and Regulations for
Reporting and Disclosure under the Employee Retirement Income Security Act of
1974 and are not a required part of the basic financial statements.  The
supplemental schedules have been subjected to the auditing procedures applied
in the audits of the basic financial statements and, in our opinion, are
fairly stated in all material respects in relation to the basic financial
statements taken as a whole.


					/s/ Hill, Taylor & Co.

March 11, 1994

<PAGE>
<PAGE>
<TABLE>

						   USG CORPORATION INVESTMENT PLAN
					STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
						     DECEMBER 31, 1993 AND 1992

<CAPTION>
									    1993
				 ---------------------------------------------------------------------------------------------
				  USG COMMON      FIXED       GOVERNMENT     EQUITY                                FORFEITURE
				    STOCK         INCOME      INVESTMENT      INDEX       BALANCED      GROWTH        CASH
				     FUND          FUND          FUND         FUND          FUND         FUND       ACCOUNT
				 ------------ -------------- ------------ ------------- ------------ ------------ ------------
     <S>                         <C>           <C>           <C>          <C>           <C>          <C>             <C>

     ASSETS:
       Investments at
	 Market                  $ 7,808,353   $ 99,587,130  $ 4,239,684  $ 13,088,923  $ 2,085,506  $ 2,275,173     $ 19,356

       Receivables:
	 Employer contributions
	   receivable                ---          5,800,000      ---           ---          ---          ---          (19,000)
	 Employee contributions
	   receivable                ---           ---           ---           ---          ---          ---          ---

	 Interest and
	   dividend receivable            77         61,796       10,749           115           27           30           53

	 Pending transactions
	   from participants'
	   elections for transfers
	   between funds or
	   forfeitures             1,520,393       ---            40,891       109,172    1,353,057    1,030,682        2,969
				 ------------ -------------- ------------ ------------- ------------ ------------ ------------
	 Total Receivables         1,520,470      5,861,796       51,640       109,287    1,353,084    1,030,712      (15,978)
				 ------------ -------------- ------------ ------------- ------------ ------------ ------------
       Total Assets                9,328,823    105,448,926    4,291,324    13,198,210    3,438,590    3,305,885        3,378
				 ------------ -------------- ------------ ------------- ------------ ------------ ------------

     LIABILITIES:
	 Benefits payable             71,111      3,079,023       36,258        63,605        2,215        2,978      ---

	 Pending transactions
	   from participants'
	   elections for transfers
	   between funds or
	   forfeitures                14,580      3,613,797       85,595       333,753        6,027        3,412      ---
				 ------------ -------------- ------------ ------------- ------------ ------------ ------------
       Total Liabilities              85,691      6,692,820      121,853       397,358        8,242        6,390      ---
				 ------------ -------------- ------------ ------------- ------------ ------------ ------------
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS         $ 9,243,132   $ 98,756,106  $ 4,169,471  $ 12,800,852  $ 3,430,348  $ 3,299,495      $ 3,378
				 ============ ============== ============ ============= ============ ============ ============

<CAPTION>
					     1993
				 ---------------------------
				  INVESTMENT
				     PLAN
				    LOANS         TOTAL
				 ------------ --------------
     <S>                         <C>          <C>

     ASSETS:
       Investments at
	 Market                      ---      $ 129,104,125

       Receivables:
	 Employer contributions
	   receivable                ---          5,781,000
	 Employee contributions
	   receivable              2,304,501      2,304,501

	 Interest and
	   dividend receivable       ---             72,847

	 Pending transactions
	   from participants'
	   elections for transfers
	   between funds or
	   forfeitures               ---          4,057,164
				 ------------ --------------
	 Total Receivables         2,304,501     12,215,512
				 ------------ --------------
       Total Assets                2,304,501    141,319,637
				 ------------ --------------

     LIABILITIES:
	 Benefits payable            ---          3,255,190

	 Pending transactions
	   from participants'
	   elections for transfers
	   between funds or
	   forfeitures               ---          4,057,164
				 ------------ --------------
       Total Liabilities             ---          7,312,354
				 ------------ --------------
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS         $ 2,304,501  $ 134,007,283
				 ============ ==============

	       The accompanying notes to financial statements are an integral part of these statements.

</TABLE>

<PAGE>
<PAGE>
<TABLE>

						    USG CORPORATION INVESTMENT PLAN
					  STATEMENT OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
						      DECEMBER 31, 1993 AND 1992
							      (Continued)
<CAPTION>
										1992
				  ------------------------------------------------------------------------------------------------
				     USG COMMON         FIXED          GOVERNMENT         EQUITY       FORFEITURE
				       STOCK            INCOME         INVESTMENT          INDEX          CASH
					FUND             FUND             FUND             FUND         ACCOUNT         TOTAL
				  ----------------  --------------  -----------------  -------------  ------------  --------------
     <S>                             <C>            <C>                  <C>           <C>              <C>         <C>
     
	ASSETS:
      Investments at
	 Market                       $ 6,284,827   $ 100,617,220        $ 4,043,099   $ 10,550,343     $ 105,218   $ 121,600,707

       Receivables:
	 Employer contributions
	   receivable                   ---             1,100,000          ---              ---           (80,000)      1,020,000
	 Employee contributions
	   receivable                   ---              ---               ---              ---           ---            ---

	 Interest and
	   dividend receivable                345          20,290             11,127             98           297          32,157

	 Pending transactions
	   from participants'
	   elections for transfers
	   between funds or
	   forfeitures                  ---              ---                  16,889        500,850         2,495         520,234
				  ----------------  --------------  -----------------  -------------  ------------  --------------
	 Total Receivables                    345       1,120,290             28,016        500,948       (77,208)      1,572,391
				  ----------------  --------------  -----------------  -------------  ------------  --------------
       Total Assets                     6,285,172     101,737,510          4,071,115     11,051,291        28,010     123,173,098
				  ----------------  --------------  -----------------  -------------  ------------  --------------

     LIABILITIES:
	 Benefits payable                 165,237       3,270,597            117,105        138,349       ---           3,691,288

	 Accrued Administrative
	   expenses payable             ---              ---               ---              ---           ---            ---

	 Pending transactions
	   from participants'
	   elections for transfers
	   between funds or
	   forfeitures                    345,957         174,277          ---              ---           ---             520,234
				  ----------------  --------------  -----------------  -------------  ------------  --------------
       Total Liabilities                  511,194       3,444,874            117,105        138,349       ---           4,211,522
				  ----------------  --------------  -----------------  -------------  ------------  --------------
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS              $ 5,773,978    $ 98,292,636        $ 3,954,010   $ 10,912,942      $ 28,010   $ 118,961,576
				  ================  ==============  =================  =============  ============  ==============

				  The accompanying notes to financial statements are an integral part of these statements.
</TABLE>
<PAGE>
<PAGE>

<TABLE>
						USG CORPORATION INVESTMENT PLAN
				 STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
					     YEARS ENDED DECEMBER 31, 1993 AND 1992
<CAPTION>
									    1993
			       --------------------------------------------------------------------------------------------
				USG COMMON      FIXED       GOVERNMENT     EQUITY                               FORFEITURE
				  STOCK         INCOME      INVESTMENT      INDEX       BALANCED      GROWTH       CASH
				   FUND          FUND          FUND         FUND          FUND         FUND       ACCOUNT
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
     <S>                      <C>            <C>           <C>          <C>               <C>          <C>        <C>
    
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS,
       beginning of year       $ 5,773,978   $ 98,292,636  $ 3,954,010  $ 10,912,942      ---          ---        $ 28,010
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
     ADD (DEDUCT):
     Corporation contributions     ---          5,912,883      ---           ---          ---          ---         (25,181)

     Employee contributions        270,206      8,915,065      682,747     2,166,606      335,486      472,697      ---
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
				   270,206     14,827,948      682,747     2,166,606      335,486      472,697     (25,181)
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
     Income from investments:
       Dividend income             ---           ---           ---           354,332       24,137       10,733      ---
       Interest income               3,918      6,306,656      127,065       ---          ---          ---           9,202
       Realized gain (loss) on
	 sale of investments    (4,909,950)      ---           ---         2,726,236       50,056       97,186      ---
       Unrealized appreciation
	 for the year            5,770,605       ---           ---        (1,904,664)     (17,158)     (77,149)     ---
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
				   864,573      6,306,656      127,065     1,175,904       57,035       30,770       9,202
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
     Benefit payments and
       participant withdrawals    (221,782)   (10,898,107)    (363,269)     (702,646)      (3,170)      (3,389)       (551)

     Participants' elections for
       transfers between funds   2,643,203     (7,671,072)    (168,524)     (664,395)   3,047,024    2,802,829      10,935

     Withdrawals from funds        (87,046)    (2,057,904)     (62,558)      (87,554)      (6,027)      (3,412)     ---
       due to loans to participants

     Administrative expenses       ---            (44,051)     ---                (5)     ---          ---         (19,037)
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
     Net increase (decrease) in
       assets during the year    3,469,154        463,470      215,461     1,887,910    3,430,348    3,299,495     (24,632)
			       ------------ -------------- ------------ ------------- ------------ ------------ -----------
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS,
       end of year             $ 9,243,132   $ 98,756,106  $ 4,169,471  $ 12,800,852  $ 3,430,348  $ 3,299,495     $ 3,378
			       ============ ============== ============ ============= ============ ============ ===========
<CAPTION>

					   1993
			       ---------------------------

				   LOAN
				 ACCOUNT        TOTAL
			       ------------ --------------
     <S>                          <C>       <C>

     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS,
       beginning of year           ---      $ 118,961,576
			       ------------ --------------
     ADD (DEDUCT):
     Corporation contributions     ---          5,887,702

     Employee contributions        ---         12,842,807
			       ------------ --------------
				   ---         18,730,509
			       ------------ --------------
     Income from investments:
       Dividend income             ---            389,202
       Interest income             ---          6,446,841
       Realized gain (loss) on
	 sale of investments       ---         (2,036,472)
       Unrealized appreciation
	 for the year              ---          3,771,634
			       ------------ --------------
				   ---          8,571,205
			       ------------ --------------
     Benefit payments and
       participant withdrawals     ---        (12,192,914)

     Participants' elections for
       transfers between funds     ---           ---

     Withdrawals from funds      2,304,501       ---
       due to loans to participants

     Administrative expenses       ---            (63,093)
			       ------------ --------------
     Net increase (decrease) in
       assets during the year    2,304,501     15,045,707
			       ------------ --------------
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS,
       end of year             $ 2,304,501  $ 134,007,283
			       ============ ==============

			       The accompanying notes to financial statements are an integral part of these statements.
</TABLE>
<PAGE>
<PAGE>
<TABLE>

					       USG CORPORATION INVESTMENT PLAN
				  STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
					     YEARS ENDED DECEMBER 31, 1993 AND 1992
							 (continued)
<CAPTION>
									    1992
				  ---------------------------------------------------------------------------------------
				   USG COMMON        FIXED       GOVERNMENT      EQUITY       FORFEITURE
				     STOCK          INCOME       INVESTMENT       INDEX          CASH
				      FUND           FUND           FUND          FUND         ACCOUNT         TOTAL
				  -------------  -------------  ------------  -------------  ------------  --------------
     <S>                          <C>            <C>            <C>            <C>             <C>         <C>

     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS,
       beginning of year          $ 20,589,161   $ 88,981,872   $ 3,860,889    $ 7,486,542     $ 606,192   $ 121,524,656

     ADD (DEDUCT):
     Corporation contributions         ---          1,098,614       ---            ---          (607,561)      $ 491,053

     Employee contributions            ---          9,736,797       764,951      1,840,099       ---          12,341,847
				  -------------  -------------  ------------  -------------  ------------  --------------
				       ---         10,835,411       764,951      1,840,099      (607,561)     12,832,900
				  -------------  -------------  ------------  -------------  ------------  --------------
     Income from investments:
       Dividend income                 ---            ---           ---            258,983       ---             258,983
       Interest income                   6,856      7,012,051       156,529        ---             7,273       7,182,709
       Realized gain (loss) on
	 sale of investments        (8,582,284)       ---           ---            117,433       ---          (8,464,851)
       Unrealized appreciation
	 for the year               (4,226,694)       ---           ---            346,334       ---          (3,880,360)
				  -------------  -------------  ------------  -------------  ------------  --------------
				   (12,802,122)     7,012,051       156,529        722,750         7,273      (4,903,519)
				  -------------  -------------  ------------  -------------  ------------  --------------
     Benefit payments and
       participant withdrawals        (775,469)    (8,753,232)     (402,142)      (497,799)      ---         (10,428,642)

     Participants' elections for
       transfers between funds      (1,237,592)       295,773      (426,217)     1,361,360         6,676        ---

     Administrative expenses           ---            (79,239)      ---                (10)       15,430         (63,819)
				  -------------  -------------  ------------  -------------  ------------  --------------
     Net increase (decrease) in
       assets during the year      (14,815,183)     9,310,764        93,121      3,426,400      (578,182)     (2,563,080)
				  -------------  -------------  ------------  -------------  ------------  --------------
     NET ASSETS AVAILABLE
       FOR PLAN BENEFITS,
       end of year                 $ 5,773,978   $ 98,292,636   $ 3,954,010   $ 10,912,942      $ 28,010   $ 118,961,576
				  =============  =============  ============  =============  ============  ==============

				  The accompanying notes to financial statements are an integral part of these statements
</TABLE>
<PAGE>
<PAGE>

			USG CORPORATION
			INVESTMENT PLAN

		 NOTES TO FINANCIAL STATEMENTS
		  DECEMBER 31, 1993 AND 1992



1.  DESCRIPTION OF THE PLAN

The USG Corporation Investment Plan, also known as the USG
Corporation Investment Plan for Salaried Employees prior to
January 1, 1989 ("The Plan"), was approved by the
stockholders of the Corporation on May 11, 1977, and became
effective on July 1, 1977. On January 2, 1989, the Plan was
amended and completely restated effective as of January 1,
1989 ("restated Plan").  The amendment and restatement
incorporates all prior amendments to the Plan and makes
changes to reflect the merger of the USG Corporation Savings
Plan for Hourly Employees effective January 1,  1989,  and to
change the name of the Plan to the USG Corporation Investment
Plan.

The Plan was established to provide a means for eligible
hourly and salaried employees to participate in the earnings
of the Corporation,  to build a supplemental retirement fund
and to provide additional disability and death benefits.

The Plan provides, among other things, that participants may
contribute up to 9% of their annual compensation to the Plan
during the year effective January 1, 1989, 15% from October
1,  1985 to December 31, 1988 and 12% prior to October 15,
1985.  The amount of distributions to be made upon withdrawal
from the Plan is dependent upon the participant's and the
Corporation's contributions.  The Plan requires completion of
five years of credited service in order to be 100% vested in
the Corporation contribution.  Employee contributions are
always 100% vested.  In addition, the Plan contains
provisions under which the entire amount credited to a
participant's account is distributable upon a participant's
retirement, disability, or death.

Employee contributions are invested by the Trustee in one of
six funds: (a) common stock of USG Corporation (USG Common
Stock Fund), (b) United States Government obligations
(Government Investment Fund), (c) other obligations providing
a fixed rate of interest (Fixed Income Fund), (d) an equity
index fund which provides investment results that are
designed to correspond to the performance of publicly traded
common stocks, as represented by the Standard & Poor's 500
Composite Stock Price Index (Equity Index Fund), (e) a
balanced fund which invests in several broadly diversified
asset classes, including domestic and foreign common stock
and bonds, preferred stocks and cash (Balanced Fund), or (f)
a growth fund which invests primarily in equity securities of
large market capitalization companies with earnings that are
expected to grow at an above-average rate, but may be further
diversified by investment of a small portion of the assets in
domestic bonds, foreign common stocks and bonds, and cash
(Growth Fund).  Investment in the USG Common Stock Fund was
suspended effective January 1, 1992, but was reopened July 1,
1993.

Participants may elect to have their contributions invested
in 5% increments in any fund beginning July 1, 1993 and in
25% increments in any fund before June 30, 1993. 
Participants can also change their investment election and
previous accumulated account each quarter.  In order to
change their investment options, transfer their prior
accumulated account to another investment option, increase or
decrease the percent of contributions, and to make requests
for withdrawals, participants are required to provide notice
by the 15th day of the last month of any quarter.

At December 31, 1993 and 1992, the Fixed Income Fund was
primarily composed of an investment in group annuity
contracts maintained by New York Life Insurance Co.,
Metropolitan Life Insurance Co. and John Hancock Mutual Life
Insurance Co.  The Equity Index Fund was invested in the
Vanguard Institutional Index Fund.

As of December 31, 1993 the Balanced Fund was invested in the
Fidelity Puritan Fund and the Growth Fund was invested in the
IDS New Dimensions Fund.

Corporation contributions, whether made in cash or stock, are
initially invested in the Fixed Income Fund.  If the Trustee
is unable to invest any contributions immediately, the funds
are temporarily invested in collective investment funds and
any earnings in the fund are credited to the participants'
accounts.

The sixth amendment to the Plan was adopted in 1993 which
provides that the Corporation makes formula matching
contributions for each plan year commencing after December
31, 1992, if at least 80% of the consolidated earnings goal
of the Corporation has been met for that plan year.  For each
calendar quarter commencing after December 31, 1993, the
Corporation will also make quarterly matching contributions
in an amount equal to 25% of each eligible participant's
basic contributions made during that calendar quarter not in
excess of 4% of his or her earnings for that calendar
quarter.  This amendment also established a balanced fund and
a growth fund which increases the investment options under
the Plan to six.  In addition, provisions for loans to
participants were established by this amendment.  Certain
provisions of the sixth amendment are effective January 1,
1993, July 1, 1993 and October 1, 1993, respectively.

The Plan funds are administered under the terms of a Trust
agreement with The Northern Trust Company.  The Trust
agreement provides, among other things, that the Trustee
shall keep account of all investments, receipts and
disbursements and other transactions and shall provide
annually a report setting forth such transactions and the
status of the funds at the end of the period.

The Plan is administered by the Pension and Investment
Committee, which consists of three or more members appointed
by the Board of Directors of the USG Corporation. 
Administrative expenses of the Plan, except for charges such
as brokerage fees and expenses related to group annuity
contracts, are paid by the Corporation.

At December 31, 1993 and 1992, there were approximately 9,730
and 8,200 participants in the Plan, respectively.


2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The amounts in the accompanying statements were accumulated
from the reports of the Trustee (Note 1).  The statements are
prepared on the accrual basis of accounting.  Contributions
to the Plan are made throughout the year and adjustments are
made to the statements to accrue for the portion of annual
contributions unpaid at year-end.

All investments of the Plan are valued at market.  Unrealized
appreciation (depreciation) of investments of the Plan
represents the change between years in the difference between
the market value and cost of the investments.

Realized gains or losses on the sale of investments are
calculated based upon the historical average cost of the
investments.  Market value and cost are equal for the group
annuity contract and short-term investments.

Metropolitan Life Insurance Co., New York Life Insurance Co.
and John Hancock Mutual Life Insurance Co. group annuity
contracts earned guaranteed interest at rates varying from
5.75% to 8.77% at December 31, 1993 and 1992, respectively. 
The Insurance contract earnings are calculated net of
administrative fees.

For the USG Common Stock Fund, cost is $49,882,418 and
$54,963,763 as of December 31, 1993 and 1992, respectively. 
For the Equity Index Fund, market value increased $315,649
and $2,220,312 in excess of cost at December 31, 1993 and
1992, respectively.  For the Balanced Fund and the Growth
Fund, market value declined by $17,158 and $77,149 less than
cost at December 31, 1993, respectively.

Pending transactions from participants' elections for
transfers between funds represent the fourth quarter
transfers between funds that were elected by participants but
have not been executed by the Trustee before year-end as well
as withdrawals from participants' accounts to make loans to
them.  In order to present the proper balance of net assets
in each fund at year-end, a receivable and payable were used
to record such pending transactions and the net amount of
transfers in or out for each fund during the year was
presented in participants' elections for transfers between
funds on the accompanying statement of changes in net assets
available for plan benefits.

Benefits payable at year-end relate to amounts owed to
participants who have terminated the Plan and amounts that
are being withdrawn by active participants.

3. TAX STATUS

The Plan, as amended and restated, effective January 1, 1989,
meets the requirements of Section 401 (a) of the Internal
Revenue Code and, accordingly, its income is exempt from
Federal income tax under Section 501 (a).  Employer
contributions and the income of the Plan are not taxable to
the participants until distributions are made.


4. EMPLOYER CONTRIBUTIONS

The Corporation will make a contribution with respect to each
eligible participant only if at least 80% of the
Corporation's consolidated earnings goal is met.

The Corporation matching contribution schedule was changed
for the 1993 Plan year.  Beginning July 1, 1993, each 1%
increase in goal attainment from 80% to 99% of goal results
in a corresponding 1% increase in the profit sharing match,
starting at a 10% match with the attainment of 80% of
earnings goal.  Each 1% increase in goal attainment from 100%
to 109% of goal will result in a 2% increase in the profit
sharing match, starting from a 30% match with attainment of
100% of goal earnings.  And each 1% increase in goal
attainment from 110% and above will result in a 2.5% increase
in the profit sharing match, starting from 50% matching with
attainment of 110% of goal earnings.  Before June 30, 1993,
the Corporation matching contribution was 10% with attainment
of 80% to 89.9% of earnings goal, 20% matching with
attainment of 90% to 99.9% of earnings goal, 30% matching
contribution with attainment of 100% to 109.9% of earnings
goal and 50% matching contribution with attainment of 110% to
119.9% of earnings goal.  With every subsequent incremental
increase of 10 full percentage points in achievement of
consolidated earnings goal there was an incremental increase
of 25 percentage points in corporation contributions measured
as a percent of participants' contributions.

Employer contribution amounts forfeited by terminated
employees are applied as a credit against future Corporation
contributions or used to pay fees of the plan and are held in
the Forfeiture Cash Account.

5. DISTRIBUTION ON TERMINATION OF THE PLAN

In the event of any termination of the Plan, the account
balances of all affected participants shall become non-
forfeitable.

6. INVESTMENTS

The following is a summary of the Plan's investments as well
as the net realized and unrealized appreciation
(depreciation) for 1993 and 1992:
<PAGE>
<PAGE>

INVESTMENTS AT       DECEMBER 31, 1993               DECEMBER 31, 1992     
FAIR VALUE                         NET                             NET
DETERMINED BY                  APPRECIATION                   APPRECIATION
QUOTED MARKET       FAIR      (DEPRECIATION)       FAIR      (DEPRECIATION)
PRICE:              VALUE     IN FAIR VALUE        VALUE     IN FAIR VALUE 

USG Common
  Stock          $ 7,779,857   $    860,654    $  6,087,894  $(12,808,978)
Vanguard Index
  Trust           13,028,957        821,573      10,480,625       463,767
Fidelity Puritan
  Fund             2,059,716         32,898             -              - 
IDS New Dimension
  Fund             2,240,128         20,037             -              -   

SUB-TOTAL         25,108,658      1,735,162      16,568,519   (12,345,211)


INVESTMENTS AT
FAIR VALUE
DETERMINED BY
OTHER THAN
QUOTED MARKET
PRICE:                     

Mortgages,
  Notes,
  Contracts       76,070,985         ---         92,971,945        ---
Collective
  Short-Term
  Investment
  Fund            27,924,482         ---         12,060,243        ---     

SUB-TOTAL        103,995,467         ---        105,032,188        ---     

TOTAL          
INVESTMENTS     $129,104,125   $  1,735,162    $121,600,707  $(12,345,211) 


<PAGE>
<PAGE>

At December 31, 1993 and 1992, the following investments exceeded 5% of the
net assets available for the Plan benefits:

			      
				     1993                 1992   

USG Corporation Common Stock     $ 7,779,857          $ 6,087,894

Metropolitan Life Insurance
  Company, GAC 12577              20,330,895           28,297,618

New York Life Insurance
  Company, GAC 05892              13,420,101           24,676,107

John Hancock Mutual Life
      GAC 6317                    42,319,989           39,998,220

Vanguard Index Trust              13,028,957           10,480,625

Collective Short Term
  Investment Fund                 27,889,436            8,017,144

<PAGE>
<PAGE>

7.  PARTICIPANT LOANS

Effective October 1, 1993, a participant can obtain a loan
from the Plan.  Under the Plan's loan provisions, the maximum
loan allowable is one half of a participant's vested account
balance or $50,000, whichever is less.  The minimum loan
amount is $1,000.  Additional amounts can be taken in $100
increments.  The Plan restricts the participant to one
outstanding loan at a time.  The loan can be repaid by the
participant over a five year period, or sooner, in full, with
interest at the prime rate.  Default on a loan by a
participant will be treated as a hardship withdrawal and will
be subject to IRS tax penalties.











<PAGE>
<PAGE>
<TABLE>

SCHEDULE I
			   USG CORPORATION
			   INVESTMENT PLAN


		     SCHEDULE OF INVESTMENTS HELD AT YEAR END
			   DECEMBER 31,  1993

<CAPTION>
				    PRINCIPAL
				 AMOUNT/NUMBER OF                          FAIR
				     SHARES             COST               VALUE    

<S>                                 <C>             <C>               <C> 

COMMON STOCK

   USG Corporation                  265,978         $ 49,882,418      $   7,779,857

   Vanguard Index Trust             294,773           12,713,308         13,028,957

   Fidelity Puritan Fund            130,776            2,076,874          2,059,716

   IDS New Dimension Fund           156,215            2,317,277          2,240,128


TOTAL COMMON STOCKS                 847,742           66,989,877         25,108,658


CONTRACTS

   New York Life Insurance
     Company,  GAC 05892       $ 13,420,101           13,420,101         13,420,101

   Metropolitan Life Insurance
     Company,  GAC 12577       $ 20,330,895           20,330,895         20,330,895

   John Hancock Mutual Life,
     GAC 6317                  $ 42,319,989           42,319,989         42,319,989


TOTAL CONTRACTS                  76,070,985           76,070,985         76,070,985


SHORT-TERM INVESTMENTS

   Collective Government
     Short-Term Investment
     Fund                      $  4,239,684            4,239,684          4,239,684

   Collective Short-Term
     Investment Fund           $ 23,684,798           23,684,798         23,684,798

TOTAL SHORT-TERM
  INVESTMENTS                                       $ 27,942,482       $ 27,942,482


TOTAL INVESTMENTS                                   $170,985,344       $129,104,125


</TABLE>

<PAGE>
<PAGE>

SCHEDULE II


				    USG CORPORATION
				    INVESTMENT PLAN


			  SCHEDULE OF REPORTABLE TRANSACTIONS
			  FOR THE YEAR ENDED DECEMBER 31, 1993



SERIES OF TRANSACTIONS IN THE SAME SECURITY:


		     TOTAL        COST       TOTAL      CURRENT        NET
  DESCRIPTION OF   NUMBER OF       OF      NUMBER OF    VALUE OF       GAIN
     SECURITY      PURCHASES      ASSET      SALES       SALES        (LOSS)  

Vanguard
  Index Trust         50      $16,523,785     14      $14,730,191  $2,659,402

Collective
  Short-term
  Investment
  Fund               343       44,397,291    146       28,764,683     ---    

New York Life
    GAC #05892        12        1,651,309     13       12,907,315     ---    

  Metropolitan
    GAC #12577        12        1,822,405      1        9,789,128     ---  












                    CONSENT OF INDEPENDENT PUBLIC AUDITORS

                           WITH RESPECT TO FORM S-8



As independent public auditors, we hereby consent to the incorporation by
reference of our report, dated March 11, 1994, appearing in the USG
Corporation Investment Plan Annual Report on Form 11-K for the fiscal year
ended December 31, 1993, into USG Corporation's previously filed Registration
Statements No. 2-94787 and 33-9948 Form S-8.  It should be noted that we have
not examined any financial statements of the Investment Plan subsequent to
December 31, 1993, or performed any audit procedures subsequent to the date of
our report.



                                                /s/ Hill, Taylor & Co.



Chicago, Illinois
March 11, 1994















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