3017 Aurasub Announces New Endorsement Guarantees via Subsidiary Chicony Optoelectronics (Wuhan) Co., Ltd.

Release Date: July 8, 2026 Statement Date: July 7, 2026 Statement Time: 13:59:07 Company Code: 3017 Company Name: Aurasub Subject: Announcement on behalf of subsidiary Chicony Optoelectronics (Wuhan) Co., Ltd. regarding new endorsement guarantees exceeding NT$300 million and 5% of the company’s latest financial statement net value. Applicable Clause: Clause 22 Factual Date: July 7, 2026

Explanation: 1. Factual Date: 07/07/2026

2. Endorsed Guaranteed Entities: (1) Company Name: Shenzhen Xingqihong Technology Co., Ltd. (2) Relationship with Guarantee Provider: Group affiliate (both are 100% indirectly invested subsidiaries of the Company) (3) Endorsement Guarantee Limit (in thousand NT$): 7,825,253 (4) Previous Endorsement Guarantee Balance (in thousand NT$): 3,564,423 (5) Amount of New Endorsement Guarantee (in thousand NT$): 1,078,707 (6) Endorsement Guarantee Balance as of Factual Date (in thousand NT$): 4,643,130 (7) Actual Drawdown Amount by Guaranteed Company (in thousand NT$): 1,319,653 (8) Reason for New Endorsement Guarantee: Shenzhen Xingqihong Technology Co., Ltd. obtained a bank loan facility of RMB 230 million, jointly guaranteed by group affiliates Chicony Electronics (Shenzhen) Co., Ltd., Chicony Electronics (Chengdu) Co., Ltd., and Chicony Optoelectronics (Wuhan) Co., Ltd.

(1) Company Name: Chicony Electronics (Shenzhen) Co., Ltd. (2) Relationship with Guarantee Provider: Group affiliate (both are 100% indirectly invested subsidiaries of the Company) (3) Endorsement Guarantee Limit (in thousand NT$): 7,825,253 (4) Previous Endorsement Guarantee Balance (in thousand NT$): 5,628,037 (5) Amount of New Endorsement Guarantee (in thousand NT$): 2,110,514 (6) Endorsement Guarantee Balance as of Factual Date (in thousand NT$): 7,738,551 (7) Actual Drawdown Amount by Guaranteed Company (in thousand NT$): 3,754,094 (8) Reason for New Endorsement Guarantee: Chicony Electronics (Shenzhen) Co., Ltd. obtained a bank loan facility of RMB 450 million, jointly guaranteed by group affiliates Shenzhen Xingqihong Technology Co., Ltd., Chicony Electronics (Chengdu) Co., Ltd., and Chicony Optoelectronics (Wuhan) Co., Ltd.

3. Collateral Provided by Endorsed Guaranteed Companies: (1) Content: None (2) Value (in thousand NT$): 0

4. Latest Financial Statement of Endorsed Guaranteed Companies: (1) Capital (in thousand NT$): 1,522,010 (2) Accumulated Profit/Loss (in thousand NT$): 15,324,304

5. Conditions for Release of Endorsement Guarantee Liability: (1) Condition: Endorsement guarantee will be released after the expiration of the bank credit agreement and full repayment. (2) Date: Expiration date of the bank credit agreement and loan repayment date.

6. Total Endorsement Guarantee Limit (in thousand NT$): 90,329,770

7. Endorsement Guarantee Balance as of Factual Date (in thousand NT$): 71,144,087

8. Ratio of Endorsement Guarantee Balance Provided by the Company to the Net Value of the Latest Financial Statement of the Public Company as of Factual Date: 157.52%

9. Combined Ratio of Endorsement Guarantee, Long-Term Investment, and Fund Lending Balance to the Net Value of the Latest Financial Statement of the Public Company as of Factual Date: 64.24%

10. Other Matters to be Disclosed: I. Capital (in thousand NT$) of Endorsed Guaranteed Companies in Their Latest Financial Statements: Shenzhen Xingqihong Technology Co., Ltd.: NT$879,291 Chicony Electronics (Shenzhen) Co., Ltd.: NT$642,719

II. Accumulated Profit/Loss (in thousand NT$) of Endorsed Guaranteed Companies in Their Latest Financial Statements: Shenzhen Xingqihong Technology Co., Ltd.: NT$7,466,334 Chicony Electronics (Shenzhen) Co., Ltd.: NT$7,857,970