[Statement Company Commission Offer Bidder ASE NTD Common Share ADSs Item 9. Description (a)(7) Letter from Siliconware Precision Industries Co., Ltd. to its shareholders, dated September 10, 2015 After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: September 10, 2015 SILICONWARE] [News Release Contact: Siliconware Precision Industries Co., Ltd. No.45, Jieh Show Rd. Hsinchu Science Park, Hsinchu Taiwan, 30056 www.spil.com.tw Janet Chen, IR Director janet@spil.com.tw +886-3-5795678#3675 Byron Chiang, Spokesperson byronc@spil.com.tw +886-3-5795678#3671 Letter to shareholders September 10, 2015 Dear Shareholders, As you no doubt already know, Advanced Semiconductor Engineering, Inc. (ASE) is currently engaged in an unsolicited tender offer to acquire up]

[Statement Company Commission Offer Bidder ASE NTD Common Share ADSs Item 9. Description (a)(6) After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: September 8, 2015 SILICONWARE PRECISION INDUSTRIES CO., LTD.]

[Statement Company Commission Offer Bidder ASE NTD Common Share ADSs Item 8. Additional Information. Item 8, “Additional Information” is hereby amended and supplemented by adding the disclosure set forth below as the last paragraph under the heading “SPIL’s Earnings per Common Share, Book Value per Common Share and Distributed Earnings per Common Share”. As of or for the year ended] [J.P.Morgan August 27, 2015 The Board of Directors Siliconware Precision Industries Co., Ltd. No. 123, Sec. 3, Da Fang Road Tantzu, Taichung Taiwan, Republic of China Members of the Board of Directors: Reference is made to the tender offer (the “Tender Offer”) announced on August 21, 2015 by Advanced Semiconductor Engineering, Inc. (“ASE’’), to purchase up to NT$45 per Common]