X0202 4/A 2006-07-27 2006-07-27 0 0000757011 USG CORP USG 0001207299 FLEMING RICHARD H USG CORP 125 S FRANKLIN STREET DEPT 188 CHICAGO IL 60606 0 1 0 0 Executive Vice President Common stock 2006-07-27 4 J 0 0 0 A 810 I By IRA Common stock 2007-01-31 4 J 0 0 0 A 931.3285 I By 401(k) plan This report corrects to include the number of shares held by the reporting person in an IRA account as previously reported. The shares reported by the reporting person are those held for his account through the USG Corporation Investment Plan (401(k)). This report is intended to bring up to date holdings for that account only. The reporting person's holdings through this Plan were previously reported in Table II as Investment Plan units. Robert J. Burrell, Attorney-In-Fact 2007-02-08