EXHIBIT 4.1 COMMON STOCK COMMON STOCK PAR VALUE $.10 PER SHARE THIS CERTIFICATE IS TRANSFERABLE IN CANTON MA AND JERSEY CITY NJ Certificate Number Shares **600620****** WWWW 00000000 ***600620***** ****600620**** *****600620*** ******600620** USG Corporation INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE THIS CERTIFIES THAT MR. SAMPLE & MRS. SAMPLE & CUSIP 903293 40 5 MR. SAMPLE & MRS. SAMPLE SEE REVERSE FOR CERTAIN DEFINITIONS is the owner of ***SIX HUNDRED THOUSAND SIX HUNDRED AND TWENTY SIX*** FULLY-PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK OF USG Corporation (hereinafter called the "Corporation"), transferable on the books of the Corporation by the owner in person or by duly authorized attorney upon surrender of this Certificate properly endorsed. This Certificate and the shares represented hereby are issued and shall be held subject to all of the provisions of the Certificate of Incorporation of the Corporation and all amendments thereto (copies of which are on file with the Transfer Agent), to all of which each holder, by acceptance hereof, assents. This Certificate is not valid unless countersigned by the Transfer Agent and registered by the Registrar. In Witness Whereof, the Corporation has caused this Certificate to be signed by its duly authorized officers, and its corporate seal to be hereunto affixed. Chairman of the Board and Chief Executive Officer DATED (Month Day, Year) COUNTERSIGNED AND REGISTERED: COMPUTERSHARE INVESTOR SERVICES, LLC. (CHICAGO) TRANSFER AGENT AND REGISTRAR Corporate Secretary Corporate Secretary USG Corporation This Certificate also evidences and entitles the holder hereof to certain Rights as set forth in a Rights Agreement, dated as of December 21, 2006 (the "Rights Agreement"), adopted by USG Corporation, the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal executive offices of USG Corporation. The Rights are not exercisable prior to the occurrence of certain events specified in the Rights Agreement. Under certain circumstances, as set forth in the Rights Agreement, such Rights may be redeemed, may be exchanged, may expire, may be amended, or may be evidenced by separate certificates and no longer be evidenced by this Certificate. USG Corporation will mail to the holder of this Certificate a copy of the Rights Agreement, as in effect on the date of mailing, without charge promptly after receipt of a written request therefore. Under certain circumstances as set forth in the Rights Agreement, Rights that are or were beneficially owned by an Acquiring Person or any Affiliate or Associate of an Acquiring Person (as such terms are defined in the Rights Agreement) may become null and void. The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full according to applicable laws or regulations: TEN COM - as tenants in common UNIF GIFT MIN ACT- ___________ Custodian TEN ENT - as tenants by the entireties under Uniform Gifts to Minors Act JT TEN - as joint tenants with right UNIF TRF MIN ACT Custodian (until age ___) of survivorship and not as tenants in common (Cust) (Minor) under Uniform Transfers to Minors Act ____ (State) </TaBLE> Additional abbreviations may also be used though not in the above list. The Corporation will furnish without charge to each stockholder who so requests the designations, preferences and relative, participating, optional or other special rights of each class of stock or series of the Corporation and the qualifications, limitations or restrictions of such preferences and rights. Such request may be made to the corporation, at its headquarters, Chicago, Illinois. keep this certificate in a safe place. if it is lost, stolen or destroyed the corporation may require a bond of indemnity as a condition to the issuance of a replacement certificate. PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE For value received, ____________ hereby sell, assign and transfer unto of the capital stock represented by the within Certificate, and do hereby irrevocably constitute and appoint Shares to transfer the said stock on the books of the within-named Corporation with full power of substitution in the premises. Attorney Signature(s) Guaranteed: Medallion Guarantee Stamp THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR Dated: __________ 20__ INSTITUTION (Banks, Stockbrokers, Savings and Loan Associations and Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, Signature: PURSUANT TO S.E.C. RULE 17Ad-15. -------------------------- Signature: -------------------------- Notice: The signature to this assignment must correspond with the name as written upon the face of the certificate, in every particular, without alteration or enlargement, or any change whatever.