1 Page one of 6 pages. Exhibit Index is on Page four. - -------------------------------------------------------------------------------- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 18, 1999 LAM RESEARCH CORPORATION ----------------------------------------------------- (Exact name of registrant as specified in its charter) Delaware 000-12933 94-2634797 ------------------------------- ----------------------- -------------------------------- (State or Other Jurisdiction of (Commission File Number) (IRS Employer Identification No.) Incorporation) 4650 Cushing Parkway, Fremont, California 94538 ----------------------------------------------- (Address of Principal Executive Offices) (510) 659-0200 -------------- (Registrant's Telephone Number, Including Area Code) Not Applicable -------------- (Former Name or Former Address, if Changed Since Last Report.)

2 Item 5. Other Events On January 18, 1999, Lam Research Corporation (the "Company") announced that it will incur a charge for the quarter ending December 31, 1998 as a result of the restructuring previously disclosed by the Company. Attached hereto as Exhibit 99.1 is the Company's press release dated January 18, 1999. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits (c) Exhibits 99.1 Lam Research Corporation Press Release dated January 18, 1999. 2

3 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. DATED: January 20, 1999 LAM RESEARCH CORPORATION By: /s/ Richard H. Lovgren ----------------------- Name: Richard H. Lovgren Title: Vice President, Secretary and General Counsel 3

4 EXHIBIT INDEX Page No. in Sequentially Exhibit No. Description Numbered Current Report - ---------- ----------- ----------------------- 99.1 Lam Research Corporation Press Release dated 5 January 18, 1999. 4

1 Exhibit 99.1 FOR IMMEDIATE RELEASE Contacts: Kathleen Bela Lisa Garber Investor Relations Corporate Communications Lam Research Corporation Lam Research Corporation Phone: 510/572-4566 Phone: 510/572-4538 Fax: 510/572-6454 Fax: 510/572-2935 e-mail: kathleen.bela@lamrc.com e-mail: lisa.garber@lamrc.com LAM RESEARCH CORPORATION ANNOUNCES RESTRUCTURING CHARGE FREMONT, Calif., January 18, 1999--Lam Research Corporation (Nasdaq: LRCX), a leading supplier of wafer fabrication equipment to the worldwide semiconductor industry, today announced that it will incur a charge of $53.4 million, or $1.39 per share, for the quarter ending December 31, 1998, as a result of the restructuring disclosed on November 12, 1998. The charge carries no anticipated tax benefit and relates primarily to costs associated with employee severance compensation, facilities consolidation, and the write-off of fixed assets utilized in affected operations. The company will announce full results for the quarter ending December 31, 1998 on January 28, 1999. This press release contains certain forward-looking statements and other prospective information within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, as amended, which statements are subject to the Safe Harbor ~ more ~

2 Lam Announces Restructuring Charge...................................page 2 of 2 Provisions created thereunder. Such forward-looking statements and other prospective information are subject to various risks, uncertainties and changes in condition, significance, value and effect that could cause results to differ materially and in ways not readily foreseeable, and which are detailed from time to time in the company's SEC reports, including the most recent reports on Form 10-K for the fiscal year ended June 30, 1998, and Form 10-Q for the fiscal quarter ended September 30, 1998. The company assumes no obligation to update the information in this release. Lam Research Corporation is a leading supplier of wafer fabrication equipment and services to the world's semiconductor industry. Lam's headquarters are located in Fremont, California. The company's common stock trades on the Nasdaq National Securities Market under the symbol "LRCX." ###