SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C. 20549

                                      FORM 10-C

                   REPORT BY ISSUER OF SECURITIES QUOTED ON NASDAQ
                            INTERDEALER QUOTATION SYSTEMS

                     FILED PURSUANT TO SECTION 13 OR 15(d) OF THE
                   SECURITIES EXCHANGE ACT OF 1934 AND RULE 13a-17
                                 OR 15d-17 THEREUNDER

                               LAM RESEARCH CORPORATION
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                    (Exact name of issuer as specified in charter)

                 4650 Cushing Parkway, Fremont, California 94538-6470
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                      (Address of principal executive offices)

Issuer's telephone number, including area code    (510) 659-0200
                                               --------------------

                      I. CHANGE IN NUMBER OF SHARES OUTSTANDING
    Indicate any change (increase or decrease) of 5% or more in the number of
shares outstanding:

1.  Title of security    Common Stock, $0.001 par value
                          ------------------------------

2.  Number of shares outstanding before the change    27,554,616
                                                       ----------

3.  Number of shares outstanding after the change     30,194,616*
                                                       ----------

4.  Effective date of change      May 2, 1996
                                   -----------

5.  Method of change:

Specify method (such as merger, acquisition, exchange, distribution, stock
split, reverse split, acquisition of stock for treasury, etc.):  CONVERSION OF
CONVERTIBLE SUBORDINATED DEBENTURES.

Give brief description of transaction: PURSUANT TO A REGISTRATION STATEMENT ON
FORM S-3, SEC REGISTRATION NO. 33-61726, THE ISSUER SOLD CONVERTIBLE
SUBORDINATED DEBENTURES IN A REGISTERED PUBLIC OFFERING.  SUCH DEBENTURES ARE
CONVERTIBLE INTO SHARES OF THE ISSUER'S COMMON STOCK.


                            II.  CHANGE IN NAME OF ISSUER

     Not Applicable



Date:  May 31, 1996                              /s/ HENK J. EVENHUIS
                                        ---------------------------------------
                                       (Officer's signature and title)

                                       Henk J. Evenhuis,
                                       Executive Vice President, Finance,
                                       Chief Financial Officer

* NUMBER OF SHARES OUTSTANDING AFTER CHANGE INCLUDES THE CONVERSION OF
CONVERTIBLE SUBORDINATED DEBENTURES INTO 2,640,000 SHARES OF THE ISSUER'S COMMON
STOCK.