[CMC] Announcement regarding acquisition of securities

1. Name of securities: WIN Semiconductors Common Stock 2. Transaction date: 115/5/27 - 115/6/4 3. Date of board approval: N/A 4. Other authorization date: Authorized by Chairman, June 4, 115 5. Transaction volume, price per unit, and total amount: 835,000 shares, 522.00 NTD per unit, total 435,873,682 NTD 6. Disposal gain/loss: N/A 7. Relationship with the company: None 8. Cumulative holdings: 371,000 shares, value 192,728,497 NTD, holding percentage 0.09%, no restricted rights 9. Impact on assets: Percentage of total assets 79.61%, percentage of equity attributable to parent company owners 114.34%, working capital 8,285,327,000 NTD 10. Purpose: Investment portfolio 11. Dissenting opinions: None 12. Related party transaction: No 13. Relationship with counterparty: N/A 14. Audit committee approval: N/A 15. Prior announcement: N/A 16. Other notes: Authorized on 115/03/31 to conduct transactions in the centralized market during the second quarter of 115.