Stakeholders Communication

SUNREX identifies seven key stakeholder groups that may be affected by its organizational activities, taking into account the nature of its operations, the markets for its products and services, business relationships, and industry characteristics. These stakeholders include customers, shareholders and investors, employees, suppliers, financial institutions, government agencies, and local communities. The Company convenes internal meetings led by responsible departments, referencing international standards such as the GRI Universal Standards and the United Nations Sustainable Development Goals (SDGs), together with key industry trends and stakeholder engagement processes, to consolidate a list of topics. The stakeholder engagement process includes key concerns, communication channels and response mechanisms, and communication frequency, as detailed in the table below. SUNREX’s stakeholder engagement activities for 2025 were reported to the Board of Directors on December 16, 2025.

Stakeholders are also welcome to contact us through the Company’s official website via the Investor Contact section.

Stakeholder Group	Priority Topics of Concern	Communication Channels and Response Methods	Communication Frequency and Engagement in 2025
Customers	Customer service management Cybersecurity Climate change response Energy management Waste management Anti-discrimination and anti-corruption policies	Quality management audits On-site visits Public information on the website and telephone communication Email and questionnaire surveys	Annual customer audits Meetings held as needed for review Quarterly Business Reviews (QBRs) held on an ad hoc basis Survey responses provided as required A total of 48 customer-related engagements in 2025, including training sessions and surveys
Shareholders and Investors	Short-, medium-, and long-term development strategies Corporate governance and internal control Risk management Operational performance	Shareholders’ meeting Public disclosures on the Company website, including the investor relations section	Annual shareholders’ meeting Seven Board meetings held in 2025 Annual General Meeting held on May 29, 2025
Employees	Labor-management relations Occupational health and safety Employee relations Employee compensation and benefits Protection of labor rights Workplace equality and diversity	Multiple grievance channels, including employee mailboxes and direct communication with supervisors Two-way communication with management through meetings among managerial-level staff Labor-management meetings and employee welfare committee meetings	Conducted regularly or on an ad hoc basis Employee training programs New employee orientation programs
Suppliers	Occupational health and safety Supplier management	On-site visits and tiered evaluations Quality management audits Public disclosures on the website Supplier hotline Email and questionnaire surveys	Supplier audits conducted as required Regular supplier evaluations Meetings held as needed for review
Financial Institutions	Operational performance Corporate governance and internal control	On-site visits Public information on the website and telephone communication Email correspondence and credit investigations	Regular financial and tax audits
Government Agencies	Compliance with environmental regulations Water management Hazardous substances management Climate change response	Participation in government-organized seminars On-site inspections Written audits and official correspondence Public information on the website and telephone communication	Regular written responses and ad hoc inspections Participation in three Taiwan Stock Exchange briefing sessions in 2025
Local Communities	Community engagement and social contribution	On-site visits to understand community needs	Ongoing or on an ad hoc basis

Grievance and Whistleblowing Mechanism

SUNREX is committed to maintaining a lawful, fair, and transparent operating environment. The Company has established grievance and whistleblowing policies and procedures, which are publicly disclosed on its official website and internal network, to ensure that both internal and external stakeholders can effectively report illegal (including corruption) or unethical conduct. SUNREX provides full confidentiality and protection measures for whistleblowers throughout the reporting and investigation process.

◆ Reporting Channels

To enable internal and external stakeholders to report unlawful or unethical conduct, the Company has established the following dedicated reporting channels:

Whistleblowing Hotline: +886-4-2568-6983 ext. 204
Whistleblowing Email: eason.tsai@sunrex.com.tw

◆ Whistleblowing Handling Procedures

Information to Be Provided by the Whistleblower
- Name and contact information of the whistleblower (anonymous reporting is permitted).
- Name of the reported individual and a detailed description of the alleged conduct.
- Relevant supporting evidence (such as documents, audio recordings, photographs, etc.).
Reporting Acceptance Level and Responsible Units
- Reports are received by designated personnel within the Administration Department, with assistance from internal auditors when necessary.
- Depending on the subject of the report, cases are handled by the relevant responsible supervisors and departments at appropriate levels.
Handling Procedures
- (1) Initial Review: Upon receipt of a report, designated personnel conduct a preliminary review to assess the validity and completeness of the reported information.
- (2) Investigation Stage: Internal auditors assist in conducting investigations, collecting relevant evidence, and interviewing related personnel.
- (3) Investigation Report: Upon completion of the investigation, a report is prepared and submitted to senior management for review and decision-making.
- (4) Disciplinary Actions and Improvement Measures: If the allegations are substantiated, disciplinary actions will be imposed in accordance with Company regulations, and improvement measures will be implemented as necessary.
Record Retention
- All whistleblowing cases are retained in a confidential manner, and relevant records are archived for at least five years after the conclusion of the investigation.
Whistleblower Protection Mechanism
- (1) Confidentiality Commitment: The identities of whistleblowers, reporters, and individuals assisting in investigations are kept strictly confidential throughout the entire process.
- (2) Anti-Retaliation Measures: Any form of retaliation against whistleblowers or related personnel is strictly prohibited. Violators will be subject to severe disciplinary actions in accordance with Company regulations.