Press Releases

Lam Announces Inclusion in Nasdaq-100 Index®FREMONT, Calif., December 16, 2003--Lam Research Corporation (Nasdaq: LRCX) today announced that, effective Monday, December 22, 2003, the Company will be included in the Nasdaq-100 Index.

"We are honored to be included in the Nasdaq-100 Index," stated James W. Bagley, Lam's chairman and chief executive officer. "This milestone validates Lam's position as a core holding for global technology investors and reflects our continued progress and success in establishing the Company as a recognized industry leader."

The Nasdaq-100 Index includes some of the world's largest technology companies. The Index has risen 1039% since its inception.

The constituents of the Nasdaq-100 Index are determined based on their market capitalization at a certain point in time, and historical results and valuations are not a guarantee of future results. This press release contains certain forward-looking statements which are subject to the Safe Harbor provisions of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements relate to Lam's status as a core holding for investors and its future status as an industry leader.

Such statements are based on current expectations and are subject to risks, uncertainties and changes in condition, significance, value and effect as well as other risks detailed in documents filed with the Securities and Exchange Commission, including specifically the reports on Form 10-K for the year ended June 29, 2003, and the Form 10-Q for the quarter ended September 28, 2003, which could cause actual results to vary from expectations. The company undertakes no obligation to update the information or statements made in this press release.

Lam Research Corporation is a leading supplier of wafer fabrication equipment and services to the world's semiconductor industry. Lam's common stock trades on the NASDAQ National Market under the symbol LRCX. The Company's World Wide Web address is http://www.lamrc.com.