[Macronix] Announcement of the Company and its Subsidiaries' New Endorsement Guarantees Reaching the Publicly Issued Company's "Loan and Endorsement Guarantee Processing Guidelines" Article 25, Paragraph 1, Subparagraph 4 Announcement Standard

1. Date of occurrence of the event: 115/05/07 2. Guaranteed company: (1) Company name: Shanghai Nomura Water Treatment Engineering Co., Ltd. (2) Relationship with the company providing endorsement guarantee: Company jointly undertaking engineering projects. (3) Endorsement guarantee limit (in thousands of NTD): 19,214,366 (4) Original endorsement guarantee balance (in thousands of NTD): 2,896,845 (5) New endorsement guarantee amount (in thousands of NTD) this time: 985,502 (6) Endorsement guarantee balance up to the date of occurrence (in thousands of NTD): 3,882,347 (7) Actual utilized amount by the guaranteed company (in thousands of NTD): 3,882,347 (8) Reason for the new endorsement guarantee this time: Needs for jointly undertaking engineering projects. (1) Company name: Guan Yue Technology Engineering Co., Ltd. (2) Relationship with the company providing endorsement guarantee: Company in which the company directly and indirectly holds more than 50% of the voting shares. (3) Endorsement guarantee limit (in thousands of NTD): 19,214,366 (4) Original endorsement guarantee balance (in thousands of NTD): 915,724 (5) New endorsement guarantee amount (in thousands of NTD) this time: 50,000 (6) Endorsement guarantee balance up to the date of occurrence (in thousands of NTD): 965,724 (7) Actual utilized amount by the guaranteed company (in thousands of NTD): 641,028 (8) Reason for the new endorsement guarantee this time: Needs for operational working capital. 3. Collateral provided by the guaranteed company: (1) Content: None. (2) Value (in thousands of NTD): 0 4. Most recent financial statement of the guaranteed company: (1) Capital (in thousands of NTD): 466,461 (2) Accumulated profit/loss (in thousands of NTD): 87,101 5. Conditions for lifting endorsement guarantee liability: (1) Conditions: Expiration of the contract term or achievement of other conditions for lifting guarantee liability. (2) Date: Date of expiration of the contract term or achievement of other conditions for lifting guarantee liability. 6. Total endorsement guarantee limit (in thousands of NTD): 30,742,986 7. Endorsement guarantee balance up to the date of occurrence (in thousands of NTD): 18,324,258 8. Ratio of endorsement guarantee balance to net worth of the publicly issued company's most recent financial statement up to the date of occurrence: 95.37% 9. Total ratio of endorsement guarantee, long-term investments, and loans to the net worth of the publicly issued company's most recent financial statement up to the date of occurrence: 26.69% 10. Other matters that should be specified: (1). This endorsement guarantee is only the amount that has been approved by the board of directors for guarantee. (2). For item five, the capital of the guaranteed companies in their most recent financial statements are NTD 216,686 thousand and NTD 249,775 thousand respectively. (3). For item six, the accumulated profit/loss of the guaranteed companies in their most recent financial statements are NTD 70,192 thousand and NTD 16,909 thousand respectively. (4). For item twelve, the total ratio of endorsement guarantee, long-term investments, and loans to the net worth of the publicly issued company's most recent financial statement up to the date of occurrence are 20.21% and 6.48% respectively. (5). The first item in item two, the endorsement guarantee amount is the guarantee amount from the group's subsidiary, Suzhou Macronix Engineering Co., Ltd., to Shanghai Nomura Water Treatment Engineering Co., Ltd. (6). The second item in item two, the endorsement guarantee amount is the guarantee amount from the company and its group subsidiary, Jiayi Energy Co., Ltd., to Guan Yue Technology Engineering Co., Ltd.