[] [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]

[] [Number: Purchaser: Advanced Semiconductor Engineering, Inc. (“Company”) Target Company: Siliconware Precision Industries Co., Ltd. Target Company No.: 2325 Purpose: The Company publically announces that the minimum condition of the tender offer for common shares and American depositary shares of Siliconware Precision Industries Co., Ltd. has been satisfied Date of occurrence: September 18, 2015 Year of tender offer: 2015 Content: 1.] [Advanced Semiconductor Engineering, Inc. IR Contact: Iris Wu, Manager irissh_wu@aseglobal.com Tel: +886.2.6636.5678 http://www.aseglobal.com Satisfaction of the Minimum Condition 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 18, 2015 — In connection with the offer to purchase, for cash, up to 779,000,000 common shares (“] [Advanced Semiconductor Engineering, Inc. IR Contact: Iris Wu, Manager irissh_wu@aseglobal.com Tel: +886.2.6636.5678 http://www.aseglobal.com ASE’s Response to SPIL Employees’ Petition in front of the Republic of China Ministry of Labor Headquarter Company ASE SPIL Tender Offer September 18, 2015 –Advanced Semiconductor Engineering, Inc. (TAIEX stock code: 2311, NYSE: ASX) (the “ Moreover, throughout our long-term operations in the industry, our Company] [ROC Tender Offer for Common Shares of SPIL at NT$45 Per Common Share by ASE Q&A I. Rules for the Republic of China (“ROC”) Tender Offer 1. What are the details of this tender offer? The tender offer mainly includes the below items: (1) Tender offer amount: Maximum number of this tender offer is 779,000,000 common shares (approximately 24.99% of]

[] [Advanced Semiconductor Engineering, Inc. Tender Offer to Acquire Common Shares of Siliconware Precision Industries Co., Ltd. Tender Offer Prospectus Amendment Comparision Table Pg. Before amendment After amendment i ≒ 4. 779,000,000 shares (including numbers of Common Shares representing the outstanding ADSs of the Target Company) (the “Offer Cap”), representing 24.99% of the total issued and outstanding Common Shares of the] [TENDER OFFER PROSPECTUS 1. Purchaser 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 Number of securities to be acquired: 779,000,000 shares (including numbers of Common]

[]