[Silicon Motion Announces Results for the Period Ended December 31, 2017 NEWS RELEASE Financial Highlights 4Q 2017 GAAP 4Q 2017 Non-GAAP • Net sales % Q/Q, -6% Y/Y $136.2 million (+7 % Q/Q, -6% Y/Y $136.2 million (+7 • Gross margin 46.5% 46.6% • Operating margin 10.0% 24.1% • Earnings per diluted ADS]