SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15D-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December, 2004 Commission File Number: 000-30540 GIGAMEDIA LIMITED 122 TunHua North Road, 14th Floor Taipei, Taiwan (R.O.C.) (Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.) Form 20-F [x] Form 40-F [ ] (Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.) Yes [ ] No [x] (If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b) :82- .) GIGAMEDIA LIMITED is filing under cover of Form 6-K: Contents 1. Press release announcing GigaMedia Limited Third Quarter 2004 Financial Results (attached hereto as Exhibit 99.1). SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. GigaMedia Limited ----------------- (Registrant) Date: December 3, 2004 By: /s/ Thomas T. Hui - ---------------------- --------------------- (Signature) Name: Thomas T. Hui Title: Chief Financial Officer