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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001348883-06-000163.txt : 20061211
<SEC-HEADER>0001348883-06-000163.hdr.sgml : 20061211
<ACCEPTANCE-DATETIME>20061211165932
ACCESSION NUMBER:		0001348883-06-000163
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20061211
DATE AS OF CHANGE:		20061211

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Silicon Motion Technology CORP
		CENTRAL INDEX KEY:			0001329394
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-82245
		FILM NUMBER:		061269071

	BUSINESS ADDRESS:	
		STREET 1:		NO. 20-1, TAIYUAN STREET
		STREET 2:		JHUBEI CITY
		CITY:			HSINCHU COUNTY
		STATE:			F5
		ZIP:			302
		BUSINESS PHONE:		886-3-552-6888

	MAIL ADDRESS:	
		STREET 1:		NO. 20-1, TAIYUAN STREET
		STREET 2:		JHUBEI CITY
		CITY:			HSINCHU COUNTY
		STATE:			F5
		ZIP:			302

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BRANDYWINE ASSET MANAGEMENT LLC
		CENTRAL INDEX KEY:			0000829108
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				510294965
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		THREE CHRISTINA CENTRE
		STREET 2:		201 N WALNUT ST STE 1200
		CITY:			WILIMINGTON
		STATE:			DE
		ZIP:			19801
		BUSINESS PHONE:		3026546162

	MAIL ADDRESS:	
		STREET 1:		THREE CHRISTINA CENTRE SUITE 1200
		STREET 2:		201 NORTH WALNUT STREET
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19801

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BRANDYWINE ASSET MANAGEMENT INC
		DATE OF NAME CHANGE:	19940214
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>simo.txt
<DESCRIPTION>SILICON MOTION
<TEXT>
                       Securities and Exchange Commission
                             Washington, D. C. 20549

                                  Schedule 13G
                    Under the Securities Exchange Act of 1934
                                (Amendment No. )

                          Silicon Motion Technology Corp
                                  Common Stock
                             CUSIP Number 82706C108

Date of Event Which Requires Filing of this Statement:      November 30, 2006

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. 82706C108

         1)     Name of reporting person:
                Brandywine Global Investment Management, LLC
                Tax Identification No.:
                51-0294965

         2)     Check the appropriate box if a member of a group:
                  a)      X
                  b)     n/a

         3)     SEC use only

         4)     Place of organization:
                  Delaware

Number of shares beneficially owned by each reporting person with:
         5)     Sole voting power:          - 0 -
         6)     Shared voting power:       3,507,200
         7)     Sole dispositive power:     - 0 -
         8)     Shared dispositive power:  3,507,200

         9)     Aggregate amount beneficially owned by each reporting person:
                  3,507,200

         10)    Check if the aggregate amount in row (9) excludes certain shares
                  n/a

         11)    Percent of class represented by amount in row (9):
                  11.44%

         12)    Type of reporting person:
                       IA, OO

CUSIP No. 82706C108

         1)     Name of reporting person:
                Legg Mason Investment Counsel, LLC
                Tax Identification No.:
                26-0103189

         2)     Check the appropriate box if a member of a group:
                  a)      X
                  b)     n/a

         3)     SEC use only

         4)     Place of organization:
                  Maryland

Number of shares beneficially owned by each reporting person with:
         5)     Sole voting power:          87,445
         6)     Shared voting power:        - 0 -
         7)     Sole dispositive power:     87,445
         8)     Shared dispositive power:   - 0 -

         9)     Aggregate amount beneficially owned by each reporting person:
                  87,445

         10)    Check if the aggregate amount in row (9) excludes certain shares
                  n/a

         11)    Percent of class represented by amount in row (9):
                  0.29%

         12)    Type of reporting person:
                       IA

 ___________________________________________________________________________
         Item 1a)     Name of issuer:
                           Silicon Motion Technology Corp

         Item 1b)     Address of issuer's principal executive offices:
                           No. 20-1, Taiyuan St.
                       Jhubei City, Hsinchu County 302
                                  Taiwan

         Item 2a)    Name of person filing:
                           Brandywine Global Investment Management, LLC
                           Legg Mason Investment Counsel, LLC

         Item 2b)    Address of  principal business office:
                           2929 Arch Street
                              8th Floor
                        Philadelphia, PA 19104

         Item 2c)    Citizenship:
                           Brandywine Global Investment Management, LLC
                           Delaware Limited Liability Company
                           Legg Mason Investment Counsel, LLC
                           Maryland Limited Liability Company

         Item 2d)    Title of class of securities:
                           Common Stock

         Item 2e)    CUSIP number:   82706C108

         Item 3)     If this statement is filed pursuant to Rule 13d-1(b),
                           or 13d-2(b), check whether the person filing is a:
         (a)[ ]Broker or dealer under Section 15 of the Act.
         (b)[ ]Bank as defined in Section 3(a) (6) of the Act.
         (c)[ ]Insurance Company as defined in Section 3(a) (6) of the Act.
         (d)[ ]Investment Company registered under Section 8 of the Investment
               Company Act.
         (e)[ ]Investment Adviser registered under Section 203 of the Investment
               Advisers Act of 1940.
         (f)[ ]Employee Benefit Plan, Pension Fund which is subject to ERISA
               of 1974 or Endowment Fund; see 240.13d-1(b)(ii)(F).
         (g)[ ] Parent holding company, in accordance with 240.13d-1(b)(ii)(G).
         (h)[X] Group, in accordance with 240.13d-1(b)(1)(ii)(H).

         Item 4)    Ownership:
         (a)     Amount beneficially owned: 3,594,645

         (b)     Percent of Class:  11.73%

         (c)     Number of shares as to which such person has:
                  (i)   sole power to vote or to direct the vote:
                                     87,445
                  (ii)  shared power to vote or to direct the vote:
                                   3,507,200
                  (iii) sole power to dispose or to direct the disposition of:
                                     87,445
                  (iv)  shared power to dispose or to direct the disposition of:
                                   3,507,200

         Item 5)    Ownership of Five Percent or less of a class:
                           n/a

         Item 6)    Ownership of more than Five Percent on behalf of another
                    person:

                    No single account owns more than 5% of the shares
                    outstanding.

         Item 7)    Identification and classification of the subsidiary which
                    acquired the security being reported on by the parent
                    holding company:

                           n/a

         Item 8)    Identification and classification of members of the group:
                           Brandywine Global Investment Management, LLC
                           Legg Mason Investment Counsel, LLC

         Item 9)    Notice of dissolution of group:
                           n/a

         Item 10)   Certification:

                           By signing below I certify that, to the best of my
         knowledge and belief, the securities referred to above were acquired
         and are held in the ordinary course of business and 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.

                                    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.

         -------------------------------
         Date - December 11, 2006

         Brandywine Global Investment Management, LLC


         By _________________________________________________
            /s/  Henry Otto   Executive Vice President



</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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