[] [TENDER OFFER PROSPECTUS 1. Purchaser ASE Purchaser: Advanced Semiconductor Engineering, Inc. (the “ 2. Target Company SPIL Target Company: Siliconware Precision Industries Co., Ltd. (the “ 3. Common Shares ADSs Offerees Type of securities to be acquired: Common shares (the “ 4. Offer Cap ≒ Minimum Shares ROC Offer FTC Number of securities to be acquired: 770,000,000 shares (including those] [Article 12 of the Business Mergers And Acquisitions Act 第 條 企 業 併 購 法 12 1. Under the following circumstances, shareholders may request the company to purchase back shares owned by him/her/it at a fair value at that time in the course of the merger or acquisition: 公司於進行併購而有下列情形之一，股東得請求公司按當時公平價格， 收買其持有之股份： (1) A shareholder who dissents to a proposed amendment]

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[] [Number: 1 Name of the Offeror: Advanced Semiconductor Engineering, Inc. Name of the company being acquired: Siliconware Precision Industries Co., Ltd. Code of the company being acquired: 2325 Subject: Announcement of the Offeror in relation to Expiration of the Tender Offers for Siliconware Precision Industries Co., Ltd.’s Common Shares Date of the occurrence of the affair: September 22, 2015 Year] [Advanced Semiconductor Engineering, Inc. IR Contact: Iris Wu, Manager irissh_wu@aseglobal.com Tel: +886.2.6636.5678 http://www.aseglobal.com Announcement of the Result of ASE’s Tender Offers for SPIL’s Common Shares and ADSs Common Shares SPIL ADSs ASE we U.S. Offer ROC Offer Taipei, Taiwan, R.O.C., September 22, 2015 — In connection with the offer to purchase, for cash, up to 779,000,000 common shares (“ ASE]