[Statement Company Offer Bidder ASE NTD Common Share ADSs Commission This Solicitation/Recommendation Statement on Schedule 14D-9 (this “ Item 1. Subject Company Information. Securities (b) The classes of equity securities to which this Statement relates are the Common Shares and the ADSs (together the “ Item 2. Identity and Background of Filing Person. The filing person is the subject company.]

[Statement Company Offer Bidder ASE NTD Common Share ADSs Commission This Solicitation/Recommendation Statement on Schedule 14D-9 (this “ Item 1. Subject Company Information. Securities (b) The classes of equity securities to which this Statement relates are the Common Shares and the ADSs (together the “ Item 2. Identity and Background of Filing Person. The filing person is the subject company.]

[Statement Company Commission Offer Bidder ASE NTD Common Share ADSs Item 9. Description (a)(10) Notice to shareholders of Siliconware Precision Industries Co., Ltd., dated September 18, 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 18, 2015 SILICONWARE PRECISION] [Shareholder Notice not The Board of Directors (the “Board of Directors”) of Siliconware Precision Industries Co., Ltd. (“SPIL”) unanimously recommends that shareholders The Board of Directors believes that ASE’s tender offer is opportunistic and destructive to shareholder value. • discount By taking advantage of a recent low point in the Taiwan stock market and SPIL’s lowest closing stock trading price]

[Statement Company Commission Offer Bidder ASE NTD Common Share ADSs Item 9. Description (a)(9) Letter to shareholders of Siliconware Precision Industries Co., Ltd., dated September 17, 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 17, 2015 SILICONWARE PRECISION] [Letter to Shareholders Dear Valued Shareholders: Advanced Semiconductor Engineering, Inc. (“ASE”) engaged in an unsolicited tender offer to acquire up to 25% of common shares of Siliconware Precision Industries Co., Ltd. (“SPIL”) and/or American Depositary Shares (“ADSs”) The Board of Directors is unanimous in its opposition to this attempt to take over SPIL, and believes that the offered price undervalues]

[Statement Company Commission Offer Bidder ASE NTD Common Share ADSs Item 9. Description (a)(8) Presentation to shareholders of Siliconware Precision Industries Co., Ltd., dated September 16, 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 16, 2015 SILICONWARE PRECISION] [S P I L A N D H O N H A I ’ S S T R A T E G I C A L L I A N C E September 2015 S T R I C T L Y P R I V A T E A N D C O N F I D E N]

[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]