[Silicon Motion Announces Results for the Period Ended December 31, 2014 Fourth Quarter 2014 Financial Highlights • Net sales decreased 7% quarter-over-quarter to US$80.5 million from US$86.6 million in 3Q14 • 1 Gross margin (non-GAAP • Operating expenses (non-GAAP) decreased to US$21.4 million from US$22.1 million in 3Q14 • Operating margin (non-GAAP) decreased to 25.9% from 27.3% in 3Q14 •] [Press Release issued by the Company on January 26, 2015. ILICON OTION ECHNOLOGY ORPORATION S Riyadh Lai Chief Financial Officer 2 6-K 1 d858806d6k.htm FORM 6-K]

[Silicon Motion Announces Preliminary Fourth Quarter 2014 Revenue and Earnings Conference Taipei, Taiwan, January 8, 2015 – Silicon Motion Technology Corporation (NasdaqGS: SIMO)(“Silicon Motion” or the “Company”), a global leader in designing and marketing NAND flash controllers for solid state storage devices and specialty RF IC solutions for mobile devices, announces that based upon its preliminary fourth quarter financial results,] [Press Release issued by the Company on January 8, 2015. ILICON OTION ECHNOLOGY ORPORATION S Riyadh Lai]

[Silicon Motion Strengthens Management Team with Addition of Mr. Gihyun Bae as Senior Vice President Taipei, Taiwan, January 6, 2015— Silicon Motion Technology Corporation (NasdaqGS: SIMO) (“Silicon Motion” or the “Company”) announces the addition of Mr. Gihyun Bae as Senior Vice President for Product Planning and Strategic Business Development. Mr. Bae is a seasoned executive and business leader with over] [Press Release issued by the Company on January 6, 2015. ILICON OTION ECHNOLOGY ORPORATION S Riyadh Lai]

[Silicon Motion Announces Results for the Period Ended September 30, 2014 Third Quarter 2014 Financial Highlights • Net sales increased 25% quarter-over-quarter to US$86.6 million from US$69.4 million in 2Q14 • 1 Gross margin (non-GAAP • Operating expenses (non-GAAP) increased to US$22.1 million from US$19.9 million in 2Q14 • Operating margin (non-GAAP) increased to 27.3% from 23.5% in 2Q14 •] [Press Release issued by the Company on October 29, 2014. ILICON OTION ECHNOLOGY ORPORATION S Riyadh Lai]