Matthew F. Hilzinger, executive vice president and chief financial officer of USG Corporation (NYSE:USG), a leading building products company, will speak on Thursday, September 13, 2012 at the CL King 10 th Annual Best Ideas Conference at the Omni Berkshire Place Hotel in New York. The presentation is scheduled to begin at approximately 8:40 a.m. Eastern Time. A live webcast of the presentation may be accessed from the Investor Information page of the USG Corporation web site at investor.usg.com. The webcast will be archived and available on the Investor Information Web page until Friday, September 21, 2012. To listen to the live webcast, participants must have a multimedia computer and Windows Media Player software. To download the software prior to a webcast, participants should visit investor.usg.com, click on the webcast link, complete the registration form and then click Help. Participants should access the webcast event page at least 15 minutes before the live event. About USG USG Corporation is a manufacturer and distributor of high-performance building systems through its United States Gypsum Company, USG Interiors, LLC, L&W Supply Corporation and other subsidiaries. Headquartered in Chicago, USG’s worldwide operations serve the commercial, residential, and repair and remodel construction markets. USG’s wall, ceiling, flooring and roofing products provide leading-edge building solutions for customers, while L&W Supply branch locations efficiently stock and deliver building materials nationwide. For additional information, visit the USG website at www.usg.com.