In order to improve the responsibility for the formulation and supervision of the company's ethical management policy and prevention measures, the Corporate Governance Officer under the Board of Directors and the HR department are fully committeed to the tasks, and report to the Board of Directors once a year. The latest reporting date was 11th November 2025.

Pursuant to the stipulated "Meeting Rules of Board of Directors", "Audit Committee Charter" and "Remuneration Committee Charter", the management of Board of Directors' interest avoidance is verified, and the operation of Remuneration Committee is in compliance.

To implement the publicity for the prevention of insider trading, the Board of Directors has adopted relevant management measures and publicity enforcement. According to Article 14 of the Best Business Practice Principles, the company personnel should abide by the provisions of the Securities and Exchange Law, and shall not use the unpublished information they know to engage in insider trading, or disclose such unpublished information to others, who may take advantage of such information to engage in insider trading themselves.

The company informs Directors at quarterly Board meeting of the internal material information handling procedures, which stipulates that Directors shall not conduct stock transaction during the closed periods, which are 30 days or 15 days before the proclamation of annual or quarterly financial statements, to prevent insider trading.

In addition, it's clearly stated in the Article 2 of the company's Procedures for Handling Material Inside Information that the material inside information shall be handled in accordance with relevant laws, orders, stipulations of the Taiwan Stock Exchange and regulations of this procedure.
Before reporting to work, insider must sign a statement and send relevant promotional information from time to time.

1. Internal training
   Content: the relevant publicity for corporate best business practice (including the ban on insider trading)
   Frequency: promulgation at quarterly meeting, and new employees' orientations in 2025
   Participant: the company's employees
   Number of participants: 559 persons in total
   Total training hours: 259 hrs
 
2. The company's anti-corruption channels and processing procedures

The company has established relevant management policies, including the "Best Business Practice Principles", "Codes of Ethics" and so on, which clearly stipulate that Directors, Managers and employees shall not directly or indirectly provide, promise, request or accept, in the process of conducting business activities, any illegitimage interests, or conduct dishonest hahavior such as breach of integrity, illegality, or fiduciary obligations; and appropriate remuneration systems, sound internal control systems and operating methods (including management policies, authorization systems, and division of functions, etc.) and other norms, supplemented by internal audit operations, are carried out as control measures. Moreover, a notification channel of anti-corruption mailbox is also set up for stakeholders to report corrupt and other illegal acts, as well as an independent investigation mechanism and relevant verification actions. 

The company's reporting and handling procedures
(1) Reporting channels:
Independent email for reporting: speak-up@oucc.com.tw

(2) Processing Procedures:
The company has established multiple communication channels for stakeholders' reporting any corruptive misconduct, as well as an independent investigation mechanism.

Upon acknowledgement of unlawful information, the company shall immediately have the accused personnel dealt with appropriately according to laws and stipulations or relevant regulations within the company. Should the accused be a department manager or above, the reporting will be forwarded to Audit Committee at auditcommittee@oucc.com.tw.

The operation of the company adheres to the principle of zero malpractice. If the personnel of the company take advantage of their positions, intend to seek the improper benefits for themselves or others, and incur losses of the company, the personnel as a consequence shall be dismissed from position, and compensate unconditionally for all losses the company may suffer, in terms of securing the company's reputation and rights.

Written documents, including the acceptance of the report, the investigation process and the results, shall be retained for five years and preserved electronically. Should a lawsuit related to the prosecution case occur prior to the expiry of the preservation period, the relevant materials shall be kept intact until the lawsuit is terminated.

Once the accusation is sustained, the related units of the company, accountable for the review of relevant internal control system and operating procedures, shall propose countermeasure for improvement to prevent any reoccurrence.

The whistle-blower protection system:
According to the company's stipulated "Codes of Ethics", whistle-blower's identity and reporting content shall be confidential to ensure the whistle-blower will not be treated unrighteously, and the issues reported will be verifed through independent channel.

item Date Description
  Download
1 2020.03.25 Best Practice Principles Download
2 2018.08.07 Codes of Ethics Download
3 2018.08.14 Infringement Counter Measures Download
4 2025.12.31 Integrity Management Implementation Download