<SEC-DOCUMENT>0001193125-17-297816-index.html : 20170928
<SEC-HEADER>0001193125-17-297816.hdr.sgml : 20170928
<ACCEPTANCE-DATETIME>20170928161833
ACCESSION NUMBER:		0001193125-17-297816
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		7
FILED AS OF DATE:		20170928
DATE AS OF CHANGE:		20170928
EFFECTIVENESS DATE:		20170928

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LAM RESEARCH CORP
		CENTRAL INDEX KEY:			0000707549
		STANDARD INDUSTRIAL CLASSIFICATION:	SPECIAL INDUSTRY MACHINERY, NEC [3559]
		IRS NUMBER:				942634797
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0625

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-12933
		FILM NUMBER:		171107665

	BUSINESS ADDRESS:	
		STREET 1:		4650 CUSHING BLVD
		CITY:			FREMONT
		STATE:			CA
		ZIP:			94538
		BUSINESS PHONE:		5106590200

	MAIL ADDRESS:	
		STREET 1:		4650 CUSHING PARKWAY
		CITY:			FREMONT
		STATE:			CA
		ZIP:			94538
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d381390ddefa14a.htm
<DESCRIPTION>DEFINITIVE ADDITIONAL MATERIALS
<TEXT>
Document 1 - file: d381390ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g381390notice02a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g381390notice02a.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g381390snap01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g381390snap01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g381390snap02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g381390snap02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g381390snap03.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g381390snap03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g381390snap04.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g381390snap04.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g381390snap05.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g381390snap05.jpg

</DOCUMENT>
</SEC-DOCUMENT>