[CTBC] Announcement of Company's Acquisition of Securities

1. Securities Name: TSMC Common Stock 2. Transaction Date: 115/5/18~115/6/10 3. Board of Directors Approval Date: N/A 4. Other Approval Dates: Approval Level: Chairman's Approval June 10, 115 (Republic of China calendar) 5. Transaction Quantity, Unit Price, and Total Transaction Amount: Transaction Quantity (thousands of shares): 160 Unit Price (NT$): 2,278.12 Total Transaction Amount (NT$): 364,499,195 6. Profit (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable 7. Relationship with the Company of the Traded Securities: None 8. Cumulative Quantity, Amount, Shareholding Ratio, and Circumstances of Rights Restriction (e.g., pledge) of the Securities Held to Date (including this transaction): Balance Held: 238,000 shares, Amount: NT$524,695,686 Shareholding Ratio: 0.001%, Circumstances of Rights Restriction: None 9. To date, the proportion of securities investments (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition or Disposal of Assets by Publicly Issued Companies" to the total assets and the equity attributable to owners of the parent company in the most recent financial statements, and the amount of working capital in the most recent financial statements: Proportion of Total Assets: 81.33% Proportion of Equity Attributable to Owners of the Parent Company: 116.81% Amount of Working Capital: NT$8,285,327 thousand 10. Specific Purpose of Acquisition or Disposal: Portfolio Investment 11. Opinions of Directors Expressing Dissent Regarding This Transaction: None 12. Is This Transaction a Related Party Transaction: No 13. Counterparty to the Transaction and its Relationship with the Company: Not applicable 14. Date of Supervisor's Approval or Audit Committee's Consent: Not applicable 15. Date of Previous Announcement of Major Information on the Same Event: Not applicable 16. Other Explanatory Matters: On 115/03/31, authorized personnel were granted the authority to conduct securities transactions in the centralized trading market during the second quarter of 115.