UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934





                     SILICON MOTION TECHNOLOGY CORPORATION
- --------------------------------------------------------------------------------
                                (NAME OF ISSUER)




                                 ORDINARY SHARES
- --------------------------------------------------------------------------------
                         (TITLE OF CLASS OF SECURITIES)




                                    82706C108
- --------------------------------------------------------------------------------
                                 (CUSIP NUMBER)




                                FEBRUARY 7, 2008
- --------------------------------------------------------------------------------
                          (DATE OF EVENT WHICH REQUIRES
                            FILING OF THIS STATEMENT)




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

[_]      Rule 13d-1(b)
[X]      Rule 13d-1(c)
[_]      Rule 13d-1(d)

CUSIP NO. 82706C108 13G PAGE 2 OF 6 PAGES - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS ING Groep N.V. - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) [_] Not Applicable (b) [_] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION The Netherlands - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 1,984,703 (1) NUMBER OF -------------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY 0 OWNED BY EACH -------------------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH: 1,984,703 (1) -------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 0 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,984,703 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [X] 115,000 Custodian Shares - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 6.05% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON HC - -------------------------------------------------------------------------------- - ---------- (1) 70,200 of these shares are held by indirect subsidiaries of ING Groep N.V. in their role as a discretionary manager of client portfolios.

CUSIP NO. 82706C108 13G PAGE 3 OF 6 PAGES ITEM 1(a). NAME OF ISSUER: Silicon Motion Technology Corporation ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: No. 20-1, Taiyuan Street Jhubei City Hsinchu County F5 302 Taiwan ITEM 2(a). NAME OF PERSON FILING: ING Groep N.V. ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: Amstelveenseweg 500 1081 KL Amsterdam P.O. Box 810 1000 AV Amsterdam The Netherlands ITEM 2(c). CITIZENSHIP: See item 4 on Page 2 ITEM 2(d). TITLE OF CLASS OF SECURITIES: Ordinary Shares ITEM 2(e). CUSIP NUMBER: 82706C108 ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A: (Not Applicable) (a) [_] Broker or dealer registered under Section 15 of the Securities Exchange Act of 1934, as amended (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 of 1940, as amended (the "Investment Company Act"); (e) [_] Investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E) under the Exchange Act;

CUSIP NO. 82706C108 13G PAGE 4 OF 6 PAGES (f) [_] Employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F) under the Exchange Act; (g) [_] Parent holding company or control person in accordance with Rule 13d-1(b)(ii)(G) under the Exchange Act; (h) [_] Savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; (i) [_] 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) under the Exchange Act. ITEM 4. OWNERSHIP. (a) Amount beneficially owned: See item 9 on Page 2 (b) Percent of class: See item 11 on Page 2 (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: See item 5 on Page 2 (ii) Shared power to vote or to direct the vote: See item 6 on Page 2 (iii) Sole power to dispose or to direct the disposition of: See item 7 on Page 2 (iv) Shared power to dispose or to direct the disposition of: See item 8 on Page 2 ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS. Not Applicable

CUSIP NO. 82706C108 13G PAGE 5 OF 6 PAGES ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON. Not Applicable ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON. Not Applicable ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP. Not Applicable ITEM 9. NOTICE OF DISSOLUTION OF GROUP. Not Applicable ITEM 10. CERTIFICATION. By signing below we certify that, to the best of our 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.

CUSIP NO. 82706C108 13G PAGE 6 OF 6 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. March 19, 2008 --------------------------------------- (Date) ING GROEP N.V. By: /s/ Eric E. Ribbers --------------------------------------- (Signature) Eric E. Ribbers Senior Compliance Officer --------------------------------------- (Name/Title) /s/ Klaas de Wit --------------------------------------- (Signature) Klaas de Wit Head of Compliance Insiders --------------------------------------- (Name/Title)