Driving Business towards Sustainability

Policy and Sustainability Management Goal

Tata Steel (Thailand) places importance on sustainable business operations as a key foundation of the Company’s long-term strategy and vision. The Company recognizes that integrating Environmental, Social and Governance (ESG) considerations into operational processes at all levels is not only a corporate responsibility, but also a key mechanism for enhancing competitiveness and achieving stable long-term growth.

The Company’s sustainability policy reflects its commitment to driving balanced development,
addressing climate change challenges, and creating shared value with all stakeholder groups.

The Company has concretely integrated ESG issues into both strategic and operational decision-making processes. Tata Steel’s sustainability policy focuses on integrating environmental, social, and governance considerations into decisionmaking and operations to achieve responsible long-term growth, while emphasizing stakeholders and community development alongside employee development and a
safe workplace. In this regard, the Company emphasizes resource conservation, reduction of ecosystem impacts, promotion of innovation and clean energy, and development of safe and environmentally friendly products and production processes. The Company also         aims to exceed legal compliance requirements and regularly monitor, measures, and report performance on an annual basis. Details of the full Sustainability Policy can be further studied at:https://www.tatasteelthailand .com/wp-content/uploads/2022/05/Sustainability-Policy2018-th-en.pdf

For more than 14 years, Tata Steel (Thailand) Public Company Limited (TSTH) has continuously prepared sustainability reports on an annual basis to disclose the Company’s policies, operational approaches, and economic, environmental, and social performance, including those of its subsidiary, Tata Steel Manufacturing (Thailand) Public Company Limited (TSMT), which oversees three steel manufacturing plants, namely NTS Plant, SISCO Plant, and SCSC Plant. This report covers
performance for the fiscal year 2025–26 from April 1, 2025 to March 31, 2026 and has been prepared in
accordance with internationally recognized frameworks and standards, including:

• GRI Standards (Global Reporting Initiative), with the report prepared in accordance with the “In
accordance” requirements for core indicators.

• United Nations Sustainable Development Goals (SDGs), whereby the Company’s operations are
aligned with relevant goals together with indicators aligned with the Tata Steel Group framework.

“The material topics presented in this report have been reviewed and approved by the Corporate Social
Responsibility and Sustainability Committee of the Board of Directors, including undergoing a verification process covering Environmental, Social, and Governance (ESG) aspects to ensure that the disclosures are accurate, comprehensive, and reliable.”

Sustainability Governance

Board of Directors

The Board of Directors holds quarterly meetings to oversee and monitor targets, including sustainability performance across various areas, to ensure effective implementation and achievement of the established objectives. The Social Mission and Sustainability Committee reports sustainability performance and progress to the Board of Directors twice a year. The Committee is responsible for formulating and proposing Corporate Social Responsibility (CSR) and sustainability policies to the Board of Directors, providing recommendations on action plans and budgets, and monitoring performance to ensure alignment with the Company’s policies, while taking into account stakeholder expectations and relevant sustainability trends. The Committee also reviews collaborations and best practices to continuously enhance sustainability standards, as well as reviewing sustainability information for disclosure in the Form 56-1 One Report prior to publication. In addition, the Committee regularly reports sustainability progress and performance to the Board of Directors and establishes key sustainability issues and annual targets to drive continuous improvement and development.

Corporate Social Responsibility & Sustainability Committee

The Corporate Social Responsibility and Sustainability Committee meets every six months to oversee and monitor sustainability targets and performance across various areas, ensuring effective implementation and achievement of the established objectives. The Committee reports its operational performance to the Board of Directors twice a year and is responsible for formulating and proposing Corporate Social Responsibility (CSR) and sustainability policies, as well as providing recommendations on plans, activities, and budgets. It also monitors operational performance to ensure alignment with the Company’s policies, while taking into consideration stakeholder expectations, social issues, and relevant trends. In addition, the Committee reviews collaborations and partnership networks, benchmarks practices against industry and international standards, and reviews sustainability information to be disclosed in the Form 56-1 One Report prior to publication to ensure completeness, accuracy, and compliance with relevant requirements. The Committee regularly reports its performance to the Board of Directors, establishes key sustainability issues and annual targets, and evaluates its performance to drive continuous improvement and development.

Sustainability Department

The Sustainability Department serves as the central function responsible for driving sustainability operations and coordinating with relevant departments. As the central coordinator and secretariat for ESG implementation, the Department is responsible for collecting sustainability data, developing performance monitoring systems, supporting sustainability communication and reporting in accordance with relevant standards, and reporting performance to the Social Mission and Sustainability Committee and the Board of Directors. The Department establishes the framework and management system for the Company’s sustainability operations, supports the identification of material topics and stakeholder engagement, and coordinates the preparation and disclosure of ESG information in the Form 56-1 One Report and other relevant reports, including information required for external assurance. It also communicates relevant practices, provides training, and serves as the key coordination point between the sustainability working team and the Social Mission and Sustainability Committee to support performance monitoring and decision-making on key sustainability issues.

Value Chain

The Company’s supply chain begins with both domestic and international scrap suppliers, as well as raw material and service providers. The Procurement Division engages with these vendor groups to acquire materials and services, ensuring that all raw materials undergo a quality inspection process in accordance with relevant standards, which includes measurements for radioactive substances
to facilitate the production of finished products at each plant. Subsequently, the Marketing and Sales Division handles the delivery and distribution of the finished goods to customers.

Sustainable Partnership

Building Long-Term Value Together The Company has joined as a member of several associations, councils, institutes, and steel industry networks, including:

1. Electric Arc Furnace Long Product Steel Producers Association (EAF)
2. Standard Long Steel Product Trade Association (SLP)
3. Thai Steel Wire Rod Trade Association (WR)
4. Association of Hot Rolled Structural Steel Manufacturers (AHM)
5. The Federation of Thai Industries (FTI)
6. Iron and Steel Institute of Thailand (ISIT)
7. Thai Contractors Association under H.M. The King’s Patronage (TCA)
8. Circular Economy in Construction Industry Network (CECI)

These associations play an important role in representing industry operators and coordinating with government agencies on key matters, including the development of industrial product standards and providing input on international trade agreements. They also serve as collaborative platforms to drive the steel industry toward sustainability by sharing best practices in energy and resource efficiency and circular economy practices, including the use of steel scrap as raw materials and domestic steel scrap reservation. In addition, they support workforce skill development, production safety, and accurate public communication to strengthen confidence in Thai steel products. The Company’s senior executives also hold leadership positions in these associations: Mr. Chaichalerm Bunyanuwat, Vice President of Marketing and Sales of Tata Steel (Thailand) Public Company Limited, serves as President of the EAF Long Product Steel Producers Association and Vice President of the Thai Steel Wire Rod Trade Association; Mr. Rungroth Lert-A-Rom, Vice President of SISCO Plant, serves as President of the Standard Long Steel Product Trade Association; and Mr. Sakchai Loyfakhajohn, Vice President of SCSC Plant, serves as Secretary-General of the EAF Long Product Steel Producers Association. Tata Steel (Thailand) Public Company Limited and its subsidiary companies, representing the three plants—NTS Plant, SISCO Plant, and SCSC Plant—together with 49 steel manufacturing companies in Thailand from eight steel associations, signed a Declaration of Intent to refrain from producing and distributing substandard steel products.

Since 2015, the Company has been recognized as one of the first 30 companies to join UNICEF in the Child Friendly Business initiative: “The Children Sustainability Forum,”

committing to the protection of Child Rights.

Since 2016, the Company has been certified as a member of the Thai Private Sector Collective Action Against Corruption
(CAC). In 2019, the Company was recertified by CAC for having comprehensive policies, procedures, and practices to
prevent corruption within the organization. In 2022, the Company received another three-year recertification of CAC
membership for the period from 2022 to 2025. In August 2025, the Board of Directors, upon recommendation from
the Audit and Risk Review Committee, approved the renewal of the Company’s CAC membership, and in December
2025, the Thai Private Sector Collective Action Against Corruption (CAC) announced the Company’s membership
recertification, effective from September 2025 to September 2028. In addition, the Company has also joined the
Partnership Against Corruption for Thailand (PACT).

In 2021, the Company joined The Federation of Thai Industries in obtaining certification for the Company’s products as Made in Thailand (MiT) products. This initiative forms part of the collaboration between the government sector and The Federation of Thai Industries to promote the use of domestically manufactured products in government projects in order to reduce imports and encourage domestic economic circulation, leading to the sustainable growth of the country.

Stakeholder Engagement

The Company places great importance on engagement with both internal and external stakeholders, recognizing it as a key factor supporting sustainable business operations. Opinions, recommendations, and expectations from stakeholders are used to continuously improve operational processes, risk management, and the identification and assessment of material sustainability topics. Such information is also systematically incorporated into management decision-making processes.

The Company focuses on engaging with groups that are or may be affected by its operations through appropriate and diverse communication channels in order to comprehensively respond to the needs of each stakeholder group. The Company’s stakeholders can be classified into 10 key groups based on their level of relevance and influence on the business. In the past year, the Company continued its stakeholder engagement activities without any significant changes in the structure of these stakeholder groups.