UPDATE : IHS Inc. Announces Pricing of Stockholder Offering

Business Wire, March 27, 2007

ENGLEWOOD, Colo. -- IHS Inc. (NYSE:IHS) wishes to issue the following update to its release BW6191 (CO-IHS) "IHS Inc. Announces Pricing of Stockholder Offering" issued Monday, March 26, 2007:

IHS Inc. (NYSE:IHS) today announced that an existing stockholder has priced a registered public secondary offering of 3,751,391 shares of IHS Class A common stock at $43.22 per share pursuant to IHS' shelf registration statement filed on March 22, 2007. The selling stockholder will receive $162.1 million aggregate proceeds from this offering. IHS will not receive any proceeds from this offering.

Citigroup Corporate and Investment Banking is the underwriter for the offering.

A prospectus supplement relating to the offering will be filed with the Securities and Exchange Commission. When available, a copy of the prospectus supplement may be obtained from Citigroup Corporate and Investment Banking, Brooklyn Army Terminal, 140 58th Street, 8th Floor, Brooklyn, New York 11220 (tel: 718-765-6732).

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About IHS

IHS (NYSE:IHS) is a leading provider of critical technical information, decision-support tools and related services to customers around the world. Our data and services are used primarily by the energy, defense, aerospace, construction, electronics, and automotive industries. IHS translates the value of our global information, expertise and knowledge to enable customer success and create customer delight on a daily basis. Ranging from governments and large multinational corporations to smaller companies and technical professionals in more than 100 countries, customers rely on our offerings to facilitate decision making, support key processes and improve productivity. IHS has been in business for nearly 50 years and employs more than 2,500 people around the world.

IHS is a registered trademark of IHS Inc. All other company and product names may be trademarks of their respective owners. Copyright [c] 2007 IHS Inc. All rights reserved.