Board Member Diversity

Responsibilities and Composition of TCC's Board of Directors

The Board of Directors is responsible for guiding corporate strategy, overseeing management, and remaining accountable to TCC and its shareholders. The operations and arrangements of TCC's corporate governance system ensure that the Board exercises its powers in accordance with applicable laws, TCC's Articles of Incorporation, and resolutions passed at shareholders' meetings. TCC has established a Nomination Committee and adopts a Candidate Nomination System, under which all director candidates are nominated and reviewed for qualification by the Committee. Once approved by the Board, candidates are submitted to the shareholders' meeting for election. Under TCC's Principles of Corporate Governance, the composition of the Board must reflect diversity. Beyond the knowledge and skills required for their duties, directors are expected to bring varied professional backgrounds, experience, areas of expertise, and industry literacy. As of December 2025, the average tenure of Board members is 10.4 years.

TCC's 25^th Board of Directors consists of 15 directors, including 5 independent directors, who account for one third of the Board. Several directors also serve as chairmen or directors of other listed companies. Their extensive knowledge, personal insight, and business judgment provide the leadership and decision-making capability that TCC relies on. TCC also emphasizes gender equality in Board composition, with 5 female directors representing 33% of its members. By age, 1 director is between 31 and 50 years old, and 14 directors are over 51.

Succession Plan for TCC's Board Members

TCC currently has 15 directors, including 5 independent directors. The Articles of Incorporation stipulate that all directors are elected through the Candidate Nomination System. The Principles of Corporate Governance, the Nomination Committee Charter, and the Procedures for Election of Directors all require the Board to be composed with diversity in mind, drawing on leading professionals across industries and specialists across disciplines in light of TCC's own operations, business model, and development needs. The structure of the Board and the professional backgrounds of its members will continue along these lines. On succession, the Chairman is expected to demonstrate substantial expertise and foresight in management, major decision-making, and corporate governance, and to lead TCC toward internationalization and diversified operations.

To strengthen Board effectiveness, TCC has set diversification criteria based on its operations, business model, and development needs. These criteria include, but are not limited to, the following three areas, which form the basis of the candidate pool:

• A. Basic requirements and values: gender, age, nationality, and cultural background.

• B. Professional knowledge and skills: professional background (such as law, accounting, industry, finance, marketing, or technology), specialized skills, and industry experience.

• C. ESG and environmental management capability is incorporated as a consideration in Board nominations, and TCC ensures that at least one Board member holds professional expertise in environmental issues. The Corporate Sustainable Development Committee reports on environmental matters to Board members and gathers their input on a regular basis, and TCC maintains regular exchanges with external stakeholders and experts on environmental issues. In line with regulatory requirements, TCC provides directors with periodic training across a range of subjects; environmental topics covered include, but are not limited to, climate change, water resources, and biodiversity.

• D. Each new member is expected to contribute to a Board that is effective, collaborative, diverse, and suited to TCC's needs. TCC has set a target of at least 1 female director, and requires the Board's collective expertise to cover corporate strategy, accounting and taxation, finance, law, administrative management, and production management. The screening process for the director candidate list must meet all qualification reviews and relevant requirements, so that suitable new directors can be identified and elected effectively whenever a seat becomes vacant or additional seats are planned.

Capabilities Possessed by TCC's Board of Directors

Directors are required to have the knowledge, capabilities, and literacy necessary to serve on the Board. To achieve TCC's corporate governance objectives, the Board as a whole should possess the following capabilities:

1. Business judgment

2. Accounting and financial analysis

3. Operational management, including the management of subsidiaries

4. Crisis management

5. Industry knowledge

6. Global market perspective

7. Leadership

8. Decision-making

9. Risk management knowledge and capability

10. ESG and environmental management capability

The 25^th Board of Directors prioritizes diversity and is composed of distinguished professionals from industry and academia. Their industry experience spans energy, environmental protection, cement, mergers and acquisitions and investment, and information technology. The Board also brings professional capabilities in operational management, international markets, risk management, accounting and financial analysis, law, and ESG. TCC continues to arrange a diverse range of advanced courses for Board members to improve the quality of their decisions, strengthen their supervisory role, and enhance the effectiveness of the Board.

• Extensive industry knowledge and management experience: Directors Nelson An-ping Chang, Yu-Cheng Chiao, Por-Yuan Wang, Kung-Yi Koo, Kang-Lung (Jason) Chang, Chien Wen, Liz Wang, and Independent Director Man-Jung Chan

• Financial expertise: Directors Roman Cheng, Kenneth C.M. Lo, and Eric Chen Sun Te

• Financial accounting experience: Independent Directors Victor Wang and Lynette Ling-Tai Chou

• Legal expertise: Independent Director Sherry S.L. Lin

• Information technology expertise: Independent Director Ruu Tian Chang

Specific Management Objectives

Directors receive reports from the management team at Board meetings, provide guidance and recommendations, and maintain effective communication with management in order to maximize value for shareholders. TCC also emphasizes gender equality in the composition of the Board. Five female directors currently serve on the Board, and TCC has set a target for female directors to hold at least 33% of all director seats.

Board Meetings

From May 21, 2024 to December 31, 2025, TCC's Board of Directors held 19 meetings, with a director attendance rate of 90%.

Independence

TCC's current Board consists of 15 members, of whom 5 are independent directors, accounting for 33% of the total. As of December 2025, all independent directors comply with the regulations issued by the Securities and Futures Bureau of the Financial Supervisory Commission. No circumstances specified in Paragraphs 3 and 4 of Article 26-3 of the Securities and Exchange Act exist among the directors or independent directors, confirming the independence of TCC's Board.

Directors receive reports from the management team at Board meetings, provide guidance and recommendations, and maintain effective communication with management in order to maximize value for shareholders.

Chairman

Directors

Independent Directors

Director Attendance

The 25^th Board of Directors held 19 meetings (A) from May 21, 2024 to December 31, 2025. The attendance of directors is as follows:

Important Resolutions of the Board of Directors

Important Resolutions of the Board of Directors for the 24^th Term from July 5, 2021, to December 31, 2023

Important Resolutions of the 24^th and 25^th Terms in 2024

Term of the 25^th Board of Directors: From May 21, 2024, to May 20, 2027

Important Resolutions of the 24^th and 25^th Terms in 2024

Term of the 24^th Board of Directors: From July 5, 2021, to May 21, 2024
Term of the 25^th Board of Directors: From May 21, 2024, to May 20, 2027