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, 2002.

                                       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 2002.



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/ Peter K. Maitland
                                              -----------------------------
                                              Peter K. Maitland
                                              Vice President, Compensation,
                                              Benefits and Administration


Date: March 27, 2003




                                 USG CORPORATION
                                 INVESTMENT PLAN


                                REPORT ON AUDITED
                            FINANCIAL STATEMENTS AND
                             SUPPLEMENTAL SCHEDULES


                     YEARS ENDED DECEMBER 31, 2002 AND 2001






                                TABLE OF CONTENTS


                                                                    PAGE
                                                                    ----

  INDEPENDENT AUDITORS' REPORT                                         1

  FINANCIAL STATEMENTS:

     Statements of Net Assets Available
       for Benefits                                                    2

     Statements of Changes in Net Assets
       Available for Benefits                                          3

     Notes to Financial Statements                                     4


  SUPPLEMENTAL SCHEDULES:

      I.  Schedule of Investments Held
            at Year End                                               11

     II.  Schedule of Reportable Transactions                         12



MEMBER OF THE                                                 MEMBER OF THE
ILLINOIS CPA                                                  AMERICAN INSTITUTE
SOCIETY                                                       OF CERTIFIED
                                                              PUBLIC ACCOUNTANTS
                                HILL, TAYLOR LLC
                          CERTIFIED PUBLIC ACCOUNTANTS
                     116 South Michigan Avenue - 11th Floor
                             Chicago, Illinois 60603
                                  312-332-4964
                                Fax: 312-332-0181

                          INDEPENDENT AUDITORS' REPORT

PENSION AND INVESTMENT COMMITTEE
USG CORPORATION


We have audited the accompanying statements of net assets available for benefits
of the USG Corporation Investment Plan as of December 31, 2002 and 2001, and the
related statements of changes in net assets available for 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 financial
statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the United States of America. 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 benefits of the Plan as of
December 31, 2002 and 2001, and the changes in net assets available for benefits
for the years then ended in conformity with accounting principles generally
accepted in the United States of America.

Our audits were performed 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, 2002, and reportable transactions for the
year ended December 31, 2002, are presented for the purpose of additional
analysis and are not a required part of the basic financial statements but are
supplementary information required by the Department of Labor's Rules and
Regulations for Reporting and Disclosure under the Employee Retirement Income
Security Act of 1974. These supplemental schedules are the responsibility of the
Plan's management. 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.




March 14, 2003



                         USG CORPORATION INVESTMENT PLAN

                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                           DECEMBER 31, 2002 AND 2001


                                                    2002                2001
                                                ------------        ------------
ASSETS:

    Investments, at market
                                                $336,413,983        $337,667,612
                                                ------------        ------------
    Receivables:

        Employee loans
            Receivable                            25,110,551          22,416,796
        Employer contributions
            Receivable                            20,755,665                 ---

    Interest and
        Dividends receivable                          71,643              66,182
                                                ------------        ------------

    Total Receivables                             45,937,859          22,482,978
                                                ------------        ------------

  Total Assets                                   382,351,842         360,150,590
                                                ------------        ------------

LIABILITIES:

    Accrued administrative
        Fees                                         177,595             186,813
                                                ------------        ------------

  Total Liabilities                                  177,595             186,813
                                                ------------        ------------

NET ASSETS AVAILABLE
   FOR BENEFITS                                 $382,174,247        $359,963,777
                                                ============        ============



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


                                     - 2 -

                         USG CORPORATION INVESTMENT PLAN

           STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                     YEARS ENDED DECEMBER 31, 2002 AND 2001


                                                  2002                2001
                                             -------------        -------------
NET ASSETS AVAILABLE
  FOR BENEFITS,
    beginning of year                        $ 359,963,777        $ 394,376,344
                                             -------------        -------------

ADD (DEDUCT):

    Corporation contributions                   32,239,836            8,478,636

    Employee contributions                      31,793,149           30,681,531
                                             -------------        -------------
                                                64,032,985           39,160,167
                                             -------------        -------------

    Income from investments:
      Dividend income                            1,723,247            1,625,064
      Interest income                           11,553,884           12,142,488
      Realized gain (loss) on
        sale of investments                     (9,911,879)          (7,970,701)
      Unrealized depreciation
         for the year                          (21,497,946)         (30,047,663)
                                             -------------        -------------

                                               (18,132,694)         (24,250,812)
                                             -------------        -------------

    Benefit payments and
      participant withdrawals                  (22,503,535)         (48,470,451)

    Net transactions due to loans                  (11,911)             133,086

    Administrative expenses                     (1,174,375)            (984,557)
                                             -------------        -------------

Net increase (decrease) in assets
     during the year                            22,210,470          (34,412,567)
                                             -------------        -------------

NET ASSETS AVAILABLE
   FOR BENEFITS,
     end of year                             $ 382,174,247        $ 359,963,777
                                             =============        =============


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


                                     - 3 -


                                 USG CORPORATION
                                 INVESTMENT PLAN

                          NOTES TO FINANCIAL STATEMENTS
                           DECEMBER 31, 2002 AND 2001



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. The Plan was subsequently
     amended and completely restated effective as of January 1, 1989 and most
     recently as of July 1, 1997 ("restated Plan"). The amendments and
     restatements incorporate all prior amendments to the Plan and make changes
     to reflect the merger of the USG Corporation Savings Plan for Hourly
     Employees and change the name of the Plan to the USG Corporation Investment
     Plan, effective January 1, 1989; and to implement the daily valuation of
     investments in the participants' accounts at fair market value on each
     business day effective July 1, 1997.

     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 20% (9% for highly compensated employees) of their eligible pay to the
     Plan through payroll deductions on a before-tax basis during the year
     effective January 1, 2002, 15% from January 1, 1998 to December 31, 2001,
     12% from July 1, 1997 to December 31, 1997, 9% from January 1, 1989 to June
     30, 1997, 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 three years of credited
     service, effective January 1, 2002 (five years previously), 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 any one or a
     combination of nine funds: (a) common stock of USG Corporation (USG Common
     Stock Fund), (b) 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), (c) 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), (d) 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), (e) a small cap equity fund which seeks maximum
     long-term growth of capital by investing in common stock of rapidly growing
     U.S. companies with market capitalization of less than $1 billion at the
     time of initial investment (Small Cap Equity Fund), (f) a large cap value
     fund which seeks to provide long-term growth of principal and income by
     investing in common stocks of companies that




                                     - 4 -


     appear to be temporarily undervalued by the stock market but have a
     favorable outlook for long-term growth (Large Cap Value Fund), (g) an
     international equity fund which seeks long-term capital appreciation
     through investments in common stock of established non-U.S. companies
     (International Equity Fund), (h) a bond fund which seeks to provide current
     income and preservation of capital by investing in investment grade
     corporate debt securities, government bonds and mortgages in both U.S. and
     foreign markets, (Bond Fund) or (i) a managed separate account which seeks
     to preserve principal and income while maximizing current income by
     investing in a diversified pool of Guaranteed Investment Contracts (GICs),
     separate account GICs, synthetic GICs or Structured Investment Contracts
     (SICs) and Bank Investment Contracts (BICs) of varying maturity, size and
     yield (Stable Value Fund).

     The Equity Index Fund is invested in the Vanguard Institutional Index Fund.

     The Balanced Fund is invested in the Fidelity Puritan Fund.

     The Growth Fund is invested in the AXP New Dimensions Fund - Class Y.

     The Small Cap Equity Fund is invested in the Franklin Small-Mid Cap Growth
     Fund - Class A.

         The Large Cap Value Fund is invested in the Dodge & Cox Stock Fund.

     The International Equity Fund is invested in the Templeton Foreign Fund -
     Class A.

     The Bond Fund is invested in the PIMCO Total Return Fund - Institutional
     Class.

     The Stable Value Fund is managed by PRIMCO Capital Management. At December
     31, 2002, the Stable Value Fund was primarily composed of group annuity
     contracts maintained by banks and insurance companies.

     Participants may elect to have their contributions invested in 1%
     increments in any fund or combination of funds and to change their
     contribution rate, suspend or resume their contributions, change their
     investment allocations, transfer their investments from one fund to another
     and apply for a loan by calling the USG Investment Plan Connection, an
     automated telephone service, on any day. Certain Executive officers of the
     Corporation must pre-clear any transfer out of the USG Common Stock Fund
     with the USG Corporate Secretary.

     The Corporation made a regular 50% matching contribution up to the first 6%
     of the participants' eligible pay contributed to the Plan, credited to the
     participants' accounts each pay period starting June 1, 2001. From January
     1, 2001 to May 31, 2001 the Corporation made a regular 25% matching
     contribution up to the first 6% of each participant's eligible pay
     contributed to the Plan.

     The Plan was amended effective January 1, 1999 to provide for immediate
     eligibility and enrollment to join the Plan for newly hired employees and
     current employees who are in their one year waiting period as of January 1,
     1999, unless the employee elects not to join the Plan.



                                     - 5 -


     The fifth amendment to the Plan, effective November 8, 2000, does not allow
     additional participant or employer contributions to the USG Common Stock
     Fund. The amendment also does not allow the transfer of any portion of a
     participant's interest from any other fund into the USG Common Stock Fund.

     The sixth amendment to the Plan, effective June 1, 2001, increased the
     regular matching contribution on the first 6% of participant's eligible pay
     contributed to the Plan to 50% from 25%, credited to the participant's
     account each pay period.

     The seventh amendment, effective January 1, 2002, made several technical
     changes in conjunction with the underlying Internal Revenue Code as to
     contribution limits and distribution periods and limits, increasing the
     employee contribution rate to 20%, increasing the annual basic contribution
     limit to $11,000, increasing the plan year earnings limit to $200,000, and
     increasing the maximum annual addition to $40,000. This amendment also
     changed participant vesting in Corporation contributions to three years
     from five and changed the Corporation matching formula to attainment of
     certain EBITDAR goals from the previous consolidated earnings goals.

     The eighth amendment to the Plan, effective January 1, 2003 allows for
     catch-up contributions for participants who will have attained age 50 by
     the end of the plan year. The catch-up contribution limits are in
     accordance with, and subject to the limitations of, Section 414(v) of the
     Internal Revenue Code. The catch-up contributions are not taken into
     account for purposes of determining compliance with other contribution
     limits of the Plan.

     If the Trustee is unable to invest any contributions immediately, the funds
     are temporarily invested in short-term investment funds and any earnings in
     the fund are credited to the participants' accounts.

     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 five members appointed by the Corporation. Administrative
     expenses and other fees of the Plan are shared by the Corporation and the
     participants.

     At December 31, 2002 and 2001, there were approximately 12,238 and 12,089
     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 financial statements of the Plan are
     prepared under the accrual method of accounting. Contributions to the Plan
     are made throughout the year and adjustments are made to the financial
     statements to accrue for the portion of annual contributions unpaid at
     year-end.



                                     - 6 -


     The preparation of financial statements in conformity with accounting
     principles generally accepted in the United States of America requires
     management to make estimates and assumptions that affect the reported
     amounts of assets, liabilities, and changes therein, and disclosure of
     contingent assets and liabilities. Actual results could differ from those
     estimates.

     The Plan's investments are stated at market value except for its group
     annuity contracts with insurance companies, which are valued at contract
     value because they are fully benefit responsive. For example, participants
     may ordinarily direct the withdrawal or transfer of all or a portion of
     their investment at contract value. There are no reserves against contract
     value for credit risk of the contract issuers. Market value and cost are
     equal for the group annuity contracts and short-term investments. Shares of
     registered investment companies are valued at quoted market prices which
     represent the net asset value of shares held by the Plan at year-end. The
     Company stock is valued at its quoted market price. Participant loans
     receivable are valued at cost which approximates fair value.

     Purchases and sales of securities are recorded on a trade-date basis.
     Interest income is recorded on the accrual basis. Dividends are recorded on
     the ex-dividend date. Realized gains or losses on the sale of investments
     are calculated based upon the historical average cost of the investments.
     Unrealized appreciation or depreciation of investments of the Plan
     represents the change between years in the difference between the market
     value and cost of the investments.

     The guaranteed investment contracts in the Stable Value Fund earned
     guaranteed interest at rates varying from 1.44% to 7.47% at December 31,
     2002. The rates for 2001 ranged from 4.50% to 7.47%. The guaranteed
     investment contracts earnings are calculated net of administrative fees.

     For the USG Common Stock Fund, cost was $23,326,234 and $26,311,866 as of
     December 31, 2002 and 2001, respectively. For the Equity Index Fund, cost
     exceeded market value by $7,123,086 at December 31, 2002 and market value
     exceeded cost by $5,999,385 at December 31, 2001. For the Balanced Fund,
     cost exceeded market value by $2,921,244 and $1,069,695 at December 31,
     2002, and 2001, respectively. For the Growth Fund, cost exceeded market
     value by $13,006,764 and $5,165,244 at December 31, 2002, and 2001,
     respectively. For the Small Cap Equity Fund, cost exceeded market value by
     $5,738,888 and $3,724,992 at December 31, 2002 and 2001, respectively. Cost
     exceeded market value by $654,672 for the Large Cap Value Fund at December
     31, 2002. Cost exceeded market value by $90,878 and $96,428 for the
     International Equity Fund at December 31, 2002, and 2001, respectively. For
     the Bond Fund, cost exceeded market value by $24,756 and $130,079 at
     December 31, 2002, and 2001, respectively.

     Pending transactions due to loans represent reconciliations of the loan
     amounts between the Trustee and recordkeeper at year-end, which will be
     posted to the Trustee's records in the subsequent year.

     Benefits are recorded when paid.




                                     - 7 -


3. TAX STATUS

     The Plan, as amended and restated, effective July 1, 1997, 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 formula matching contribution with respect to
     each eligible participant only if at least 80% of the USG Companies EBITDAR
     goal is met for that plan year. In 2001 and years prior to that, the
     formula used in the matching contribution calculation is the consolidated
     earnings goal, which is based on the net sales of the USG Companies less
     cost of sales and selling and administrative expenses. Beginning January 1,
     2002, the Plan uses EBITDAR (Consolidated Net Earnings of the USG Companies
     before Interest, Taxes, Depreciation, Amortization, Reorganization expenses
     and other income and expense items) as the target to measure performance
     attainment to be consistent with other USG incentive plans.

     Beginning January 1, 2002, the Corporation formula matching contribution
     schedule was set as follows: each 1% increase in goal attainment from 80%
     to 100% of goal results in a corresponding 1.5% 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 140% of
     goal will result in a 1% increase in the profit sharing match, starting
     from a 40% match with attainment of 100% of goal earnings. There is no
     additional increase in matching percentage for achieving an EBITDAR goal
     beyond 140%.

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



5. DISTRIBUTION ON TERMINATION OF THE PLAN

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






                                     - 8 -


6. INVESTMENTS

     The following is a summary of the Plan's investments as well as the net
     realized and unrealized appreciation (depreciation) for 2002 and 2001:





                                         2002                                  2001
                                        ------                                ------
                                                   NET                                   NET
                                               APPRECIATION                         APPRECIATION
                               FAIR           (DEPRECIATION)         FAIR          (DEPRECIATION)
                               VALUE          IN FAIR VALUE          VALUE          IN FAIR VALUE
                           -------------      -------------      -------------      -------------
                                                                        
Common Stock:

USG Common
   Stock                   $   4,839,349      $   1,650,999      $   3,693,161      ($ 12,227,850)
                           -------------      -------------      -------------      -------------

Mutual Funds:

   Vanguard Index
      Trust                   43,804,332        (13,696,593)        58,731,580         (9,319,893)
   Fidelity Puritan
      Fund                    19,758,185         (2,548,063)        23,074,841         (1,010,979)
   AXP New Dimensions
      Fund                    35,894,239        (10,326,773)        47,972,711         (9,376,406)
   Franklin Small-Mid
      Cap Growth Fund         13,038,488         (5,672,594)        18,097,052         (5,626,225)
   Dodge & Cox
      Stock Fund               7,141,212           (927,772)               ---                ---
   Templeton Foreign
      Fund                     6,254,958           (607,795)         7,111,988           (723,026)
    PIMCO Total Return
      Fund                    16,860,651            694,596         10,398,032            266,015
                           -------------      -------------      -------------      -------------

                             142,752,065        (33,084,994)       165,386,204        (25,790,514)
                           -------------      -------------      -------------      -------------

Mortgages, Notes,
  Contracts                  178,789,884             24,170        157,394,326                ---
Collective Short-Term
  Investment Fund             10,032,685                ---         11,193,921                ---
                           -------------      -------------      -------------      -------------

TOTAL
INVESTMENTS                $ 336,413,983      ($ 31,409,825)     $ 337,667,612      ($ 38,018,364)
                           =============      =============      =============      =============





All investments in the Plan are participant-directed investments.



                                     - 9 -



     At December 31, 2002 and 2001, the following investments
     (participant-directed) exceeded 5% of the net assets available for Plan
     benefits:

                                                  2002              2001
                                              ------------      -------------

     Vanguard Index Trust                     $ 43,804,332      $  58,731,580

     Fidelity Puritan Fund                      19,758,185         23,074,841

     AXP New Dimension Fund                     35,894,239         47,972,711

     Franklin Small-Mid Cap Growth Fund         13,038,488         18,097,052

     Allstate Insurance Company
      Contract 77032                            11,696,347         18,792,949

     Monumental Life Insurance Company
      Contract 00246TR                          22,478,371         19,007,928

     State Street Bank & Trust
      Contract 99010                            15,461,787         23,270,179

     UBS,  Contract 5021                        33,775,598         23,428,895




    7. PARTICIPANT LOANS

    Effective October 1, 1993, and as revised on July 1, 1997, a participant can
    obtain loans 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 $1 increments. A participant must have a vested
    account balance of at least $2,000 before he or she can apply for a loan.
    The Plan restricts the participant to no more than two loans outstanding at
    a time. Most loans can be repaid by the participant over a five-year period,
    or sooner, in full, with interest at the prime rate in effect at the time of
    requesting the loan. A residential loan can be repaid over a period of up to
    30 years. Default on a loan by a participant is treated as a hardship
    withdrawal and subject to IRS penalties.




                                     - 10 -

                                                                     SCHEDULE I

                                 USG CORPORATION
                                 INVESTMENT PLAN

                    SCHEDULE OF INVESTMENTS HELD AT YEAR END
                                DECEMBER 31, 2002



                                          PRINCIPAL
                                       AMOUNT/NUMBER OF                           FAIR
                                            SHARES             COST               VALUE
                                       ----------------     -----------        -----------
                                                                      
COMMON STOCK
 USG Corporation                              572,704       $ 23,326,234       $  4,839,349
 Vanguard Index Trust                         544,491         50,927,418         43,804,332
 Fidelity Puritan Fund                      1,251,310         22,679,429         19,758,185
 AXP New Dimensions Fund                    1,862,701         48,901,003         35,894,239
 Franklin Small-Mid Cap
   Growth Fund                                594,009         18,777,376         13,038,488
 Dodge & Cox Stock Fund                        81,104          7,795,884          7,141,212
 Templeton Foreign Fund                       752,703          6,345,836          6,254,958
                                         ------------        -----------        -----------

    TOTAL COMMON STOCK                                       178,753,180        130,730,763
                                                             -----------        -----------

CORPORATE BONDS
 PIMCO Total Return Fund                    1,580,192         16,885,407         16,860,651
                                         ------------        -----------        -----------

CONTRACTS
 Allstate,  77184                        $ 18,872,984         18,872,984         18,872,984
 Allstate,  77032                        $ 11,696,347         11,696,347         11,696,347
 Bank of America,  99-061                $  8,966,896          8,966,896          8,966,896
 Caisse des Deposts,  1077-01            $ 14,913,982         14,913,982         14,913,982
 ING Life & Annuity, 14621               $  4,039,047          4,039,047          4,039,047
 ING Life & Annuity, 60035               $  2,005,422          2,005,422          2,005,422
 John Hancock Mutual Life
   Insurance Co.,  GAC 9532              $ 10,678,493         10,678,493         10,678,493
 JP Morgan Chase
   Contract 401748-G                     $  1,235,324          1,235,324          1,235,324
 JP Morgan Chase
   Contract AUSG01                       $ 17,271,451         17,271,451         17,271,451
 Monumental Life Insurance
   Company,  MDA0158FR                   $  3,676,303          3,676,303          3,676,303
 Monumental Life Insurance
   Company,  00232TR                     $  1,249,867          1,249,867          1,249,867
 Monumental Life Insurance
   Company,  00218TR                     $  2,485,190          2,485,190          2,485,190
 Monumental Life Insurance
   Company,  00246TR                     $ 22,478,371         22,478,371         22,478,371
 Prudential,  10092-211                  $  3,449,987          3,449,987          3,449,987
 State Street Bank & Trust
   Contract 98203                        $  2,528,602          2,528,602          2,528,602
 State Street Bank & Trust
   Contract 99010                        $ 15,461,787         15,461,787         15,461,787
 UBS,  5126                              $  4,004,233          4,004,233          4,004,233
 UBS,  5021                              $ 33,775,598         33,775,598         33,775,598
                                         ------------       ------------       ------------

    TOTAL CONTRACTS                      $178,789,884        178,789,884        178,789,884
                                         ------------       ------------       ------------

SHORT-TERM INVESTMENTS
 Collective Short-Term
   Investment Fund                       $ 10,032,685         10,032,685         10,032,685
                                                            ------------       ------------

    TOTAL INVESTMENTS                                       $384,461,156       $336,413,983
                                                            ============       ============




                                     - 11 -

                                                                     SCHEDULE II


                                 USG CORPORATION
                                 INVESTMENT PLAN


                       SCHEDULE OF REPORTABLE TRANSACTIONS
                      FOR THE YEAR ENDED DECEMBER 31, 2002



SERIES OF TRANSACTIONS IN THE SAME SECURITY:


                       TOTAL         COST        TOTAL       CURRENT
  DESCRIPTION OF     NUMBER OF        OF       NUMBER OF     VALUE OF
     SECURITY        PURCHASES       ASSET       SALES        SALES
  --------------     ---------      ------     ---------    ----------

       None






















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