Announcement on behalf of subsidiary Elite Electronic Material (Kunshan) Co., Ltd.

Subject:Announcement on behalf of subsidiary Elite Electronic Material (Kunshan) Co., Ltd. regarding the acquisition of plant facility construction works

1.Type of contract:Construction contract

2.Date of occurrence of the event:2026/05/21

3.Date of the board of directors resolution:2025/07/30

4.Other approval date:NA

5.Counterparty to the contract and relationship with the Company:

Suzhou Yankey Electromechanical Engineering Co., Ltd.

Relationship with the company: None

6.Major content of the contract (including total contract amount,

anticipated monetary amount of participation in the investment, and start

and end dates of the contract), restrictive covenants, and other important

terms and conditions:

For plant facility construction works, the contract amount is

approximately NT$505 million.

The project will be contracted out in accordance with

the Company’s planned construction schedule.

7.Name of the professional appraisal firm or company and its

appraisal opinion:NA

8.Name of the real property appraiser:NA

9.Practice certificate number of the real property appraiser:NA

10.Concrete purpose of the acquisition: For production and operational needs.

11.Any dissenting opinions of directors to the present transaction:NA

12.Whether the counterparty of the current transaction is a related party:No

13.Date of ratification by supervisors or approval by

the audit committee:NA

14.The appraisal report has a limited price, specific price,

or special price:NA

15.An appraisal report has not yet been obtained:NA

16.Reason for an appraisal report not being obtained:NA

17.Reason for any significant discrepancy with the appraisal reports and

opinion of the CPA:NA

18.Name of the CPA firm:NA

19.Name of the CPA:NA

20.Practice certificate number of the CPA:NA

21.Date on which material information regarding the same event

has been previously released:NA

22.Any other matters that need to be specified:None