SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549


 
 

SCHEDULE 13G/A

(Rule 13d-102)
 
 

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED

PURSUANT TO RULE 13d-2(b)

( AMENDMENT 4)





Lam Research Corporation

( NAME OF ISSUER )
 
 

COMMON STOCK

(Title of Class of Securities)
 
 

512807108

(CUSIP Number)
 
 

DECEMBER 31,2012

(Date of Event Which Requires Filing of this Statement)





Check the appropriate box to designate the rule pursuant to which this Schedule is filed:


   
X Rule 13d-1 (b)
   
Rule 13d-1 (c)
   
Rule 13d-1 (d)

 


 
CUSIP No. 512807108
13G/A
Page 1 of 3 pages


 
1.
 Names of reporting persons JPMorgan Chase & Co. 
  I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) 13-2624428

 


 
2.
 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) 
    (b) 


 
3.
 SEC USE ONLY


 
4.
 CITIZENSHIP OR PLACE OF ORGANIZATION
  Delaware

 


 
NUMBER OF
5.
 SOLE VOTING POWER 16,419,719
SHARES
      
BENEFICIALLY
6.
 SHARED VOTING POWER 40,513
OWNED BY
      
EACH
7.
 SOLE DISPOSITIVE POWER 17,942,700
REPORTING
      
PERSON WITH
8.
 SHARED DISPOSITIVE POWER 58,680

 


 
9.
 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
    18,001,380


 
10.
 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES  
  CERTAIN SHARES  

 


 
11.
 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
  10.5%

 


 
12.
 TYPE OF REPORTING PERSON* HC

 

Item 1(a). Name of Issuer:
  Lam Research Corporation
Item 1(b). Address of Issuer's Principal Executive Offices:
  4650 Cushing Parkway
  Fremont, California 94538
Item 2(a). Name of Person Filing:
  JPMorgan Chase & Co. 
Item 2(b). Address of Principal Business Office or, if None, Residence:
  270 PARK AVE
  NEW YORK, NY 10017
Item 2(c). Citizenship
  Delaware
Item 2(d). Title of Class of Securities:
  COMMON STOCK 
  Unless otherwise noted, security being reported is common stock
Item 2(e). CUSIP Number: 512807108
Item 3 If this Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b)
  Or (c), Check Whether the Person Filing is a :
 
(a)
 Broker or dealer registered under Section 15 of the Exchange Act;
 
(b)
 Bank as defined in Section 3(a)(6) of the Exchange Act;
 
(c)
 Insurance company as defined in Section 3(a)(19) of the
      Exchange Act;
 
(d)
 Investment company registered under Section 8 of the Investment
      Company Act;
 
(e)
 An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
 
(f)
 An employee benefit plan or endowment fund in accordance with
      Rule 13d-1(b)(1)(ii)(F);
 
(g)
X
 A parent holding company or control person in accordance with
      Rule 13d-1(b)(1)(ii)(G);
 
(h)
 A savings association as defined in Section 3(b) of the Federal
      Deposit Insurance Act;
 
(i)
 A church plan that is excluded from the definition of an 
      Investment company under Section 3(c)(14) of the Investment 
      Company act;
 
(j)
 Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(b), check this box.
X

 

Page 2 of 3 pages


Item 4. Ownership
  Provide the following information regarding the aggregate number and
  Percentage of the class of securities of issuer identified in Item 1.
 
(a)
 Amount beneficially owned: 18,001,380
    Including 0 shares where there is a Right to Acquire.
 
(b)
 Percent of class: 10.5%
 
(c)
 Number of shares as to which such person has:
   
(i)
 Sole power to vote or to direct the vote: 16,419,719
   
(ii)
 Shared power to vote or to direct the vote: 40,513
   
(iii)
 Sole power to dispose or to direct the disposition of: 17,942,700
   
(iv)
 Shared power to dispose or to direct the disposition of: 58,680

 
 
Item 5. Ownership of Five Percent or Less of a Class. NOT APPLICABLE
If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more
than five percent of the class of securities, check the following. ( )

 
 
Item 6. Ownership of More than Five Percent on Behalf of Another Person.
JPMorgan Chase & Co. is the beneficial owner of 18,001,380 shares of the
issuer's common stock on behalf of other persons known to have one or more of
the following:
  the right to receive dividends for such securities;
  the power to direct the receipt of dividends from such securities;
  the right to receive the proceeds from the sale of such securities;
  the right to direct the receipt of proceeds from the sale of such securities;
No such person is known to have an interest in more than 5% of the class of
securities reported herein unless such person is identified below.

 
 
Item 7. Identification and Classification of the Subsidiary Which Acquired the
  Security being reported on by the Parent Holding Company.
This notice is filed on behalf of JPMorgan Chase & Co. and its wholly owned
Subsidiary (ies),
JPMorgan Chase Bank, National Association 
J.P. Morgan Investment Management Inc. 
JPMorgan Asset Management (UK) Ltd. 
J.P. Morgan Trust Company of Delaware 
JPMORGAN ASSET MANAGEMENT (JAPAN) LIMITED 
JPMORGAN ASSET MANAGEMENT (CANADA) INC. 

 
 
Item 8. Identification and Classification of Members of the Group.
  Not Applicable

 
 
Item 9. Notice of Dissolution of Group.
  Not Applicable

 
 
Item 10. Certifications

 
 
By signing below I certify that, to the best of my knowledge and belief,
the securities referred to above were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.

 
 
 

Page 3 of 3 pages



 
 
 

SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the
information set forth in this statement is true, complete and correct.
Dated: JANUARY 17,2013 
JPMorgan Chase & Co.
 
By: /s/ Margaret R. Rubin
 
--------------------------------------
 
Margaret R. Rubin
 
Compliance

 
 
 
 
 
 
 
 
The original statement shall be signed by each person on whose behalf the statement
is filed or his authorized representative. If the statement is signed on behalf of
a person by his authorized representative (other than an executive officer or general
partner of the filing person), evidence of the representative's authority to sign on
behalf of such person shall be filed with the statement, provided, however, that a 
power of attorney for this purpose which is already on file with the commission may
be incorporated by reference. The name and any title of each person who signs the
the statement shall be typed or printed beneath his signature.