ASX [ADVANCED SEMICONDUCTOR ENGINEERING] SC 13E3/A: SILICONWARE PRECISION INDUSTRIES CO., LTD. ADVANCED SEMICONDUCTOR ENGINEERING,
[SILICONWARE PRECISION INDUSTRIES CO., LTD. ADVANCED SEMICONDUCTOR ENGINEERING, INC. ASE INDUSTRIAL HOLDING CO., LTD. Co-Obligors as CITICORP INTERNATIONAL LIMITED as Trustee SUPPLEMENTAL INDENTURE Dated as of April 30, 2018 In respect of US$400,000,000 Zero Coupon Convertible Bonds Due 2019 SUPPLEME]