IHS Inc. Files Registration Statement for Secondary Sale of Common Stock by an Existing Stockholder

ENGLEWOOD, Colo., – September 29, 2006 – IHS Inc. (NYSE: IHS) announced today that it has filed a registration statement with the Securities and Exchange Commission relating to a proposed secondary offering of $300 million of its Class A common stock, including an option for the underwriters to purchase additional shares of common stock. The shares are being offered by an existing IHS stockholder. IHS will not receive any proceeds from the sale of the shares being registered.

Goldman, Sachs & Co. and Citigroup Corporate and Investment Banking are acting as joint book-running managers, with Morgan Stanley & Co. Incorporated acting as joint lead manager, and KeyBanc Capital Markets and Piper Jaffray & Co. acting as co-managers for the offering.

When available, a copy of the preliminary prospectus for the offering may be obtained from Goldman, Sachs & Co., 85 Broad Street, New York, New York 10004, Attn: Prospectus Department (Tel: 212-902-1171) and from Citigroup Corporate and Investment Banking, Brooklyn Army Terminal, 140 58th Street, 8th Floor, Brooklyn, New York 11220, Attn: Prospectus Department (Tel: 1-877-858-5407).

A registration statement relating to these securities has been filed with the Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. 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 Inc.
IHS (NYSE: IHS) is one of the leading global providers of critical technical information, decision-support tools and related services to customers in a number of industries including energy, defense, aerospace, construction, electronics, and automotive through two operating segments, Engineering and Energy. Our Engineering and Energy segments each represent approximately one-half of IHS’ total revenues. We serve customers ranging from governments and large multinational corporations to smaller companies and technical professionals in more than 100 countries. Our customers rely on our offerings to facilitate decision making, support key processes and improve productivity. We have been in business for more than 45 years and employ 2,500 people around the world.

IHS FORWARD-LOOKING STATEMENTS:
This release may contain forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements are statements that are not historical facts. Such statements may include financial projections and estimates and their underlying assumptions, statements regarding plans, objectives and expectations with respect to future operations, products, and services, and statements regarding future performance. Forward-looking statements are generally identified by the words "expect," "anticipate," "believe," "intend," "estimate," "plan" and similar expressions. Although IHS and its management believe that the expectations reflected in such forward-looking statements are reasonable, investors are cautioned that forward-looking information and statements are subject to various risks and uncertainties--many of which are difficult to predict and generally beyond the control of IHS--that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include those discussed or identified by IHS from time to time in its public filings. Other than as required by applicable law, IHS does not undertake any obligation to update or revise any forward-looking information or statements. Please consult our public filings at www.sec.gov.

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Investor Relations Contact:
Jane Okun
IHS Inc.
303-397-2747
jane.okun@ihs.com