Preliminary response to ASE's letter

TAICHUNG, , Dec. 21, 2015 /PRNewswire/ -- Siliconware Precision Industries Co., Ltd. (Taiwan Securities Exchange code: 2325, NASDAQ code: SPIL) ("The Company") received ASE's proposal on December 14, 2015 regarding the acquisition of 100% of the Company's shares in cash according to the Business Mergers And Acquisitions Act and other relevant laws and regulations in Taiwan. Because the content of the letter may result in significant impact on the Company's future operations, the Company will assess the proposal based on the best interest of the Company's future development, shareholders, customers, and employees. The proposal is set to be discussed during the board of directors' meeting on December 28, 2015.