Supply Chain Management

The Company recognizes that the supply chain is a critical mechanism for supporting sustainable business operations. Therefore, it is committed to managing suppliers and business partners with transparency, fairness, and accountability. The Company encourages its suppliers to conduct business ethically, respect human rights, prioritize occupational health and safety, protect the environment, and adhere to good corporate governance principles (ESG), thereby creating shared value and promoting sustainability throughout the supply chain.

Targets and Performance

Targets

• 100% of key suppliers (Tier 1 Suppliers) acknowledge and sign the Supplier Code of Conduct and Anti-Corruption Policy.
• Zero supplier complaints.

Performance in 2025

• 100% of key suppliers (Tier 1 Suppliers) acknowledge and sign the Supplier Code of Conduct and Anti-Corruption Policy.
• Zero supplier complaints.

Sea Oil Public Company Limited and its subsidiaries (the "Company") are committed to conducting business with integrity and in accordance with good corporate governance principles. The Company operates with transparency, accountability, and responsibility toward all stakeholders. It is dedicated to fostering sustainable business growth while maintaining a balance among economic, social, and environmental considerations in line with sustainable development principles.

To this end, the Company has established a Supplier Code of Conduct as a guideline for suppliers to conduct business in compliance with applicable laws, the Company's Code of Conduct, and international standards. The Company places great importance on encouraging suppliers to operate with transparency and fairness, respect human rights, provide fair labor practices, comply with laws and regulations, and adhere to occupational health, safety, and environmental standards. The Company also closely monitors compliance with this Supplier Code of Conduct to collectively build a resilient and efficient supply chain that creates value for society and the environment while fostering sustainable growth for all parties.

For additional information on the Supplier Code of Conduct, please refer to the Company's website.

The Company is committed to conducting business with integrity, protecting mutual interests with suppliers and creditors, and strictly complying with applicable laws and business agreements. The Company adheres to the following principles:

• The Company shall neither request, accept, nor agree to accept, nor offer or promise to offer, any improper benefits to suppliers or creditors. All dealings shall be conducted fairly and in accordance with agreed terms and conditions.
• Commercial negotiations with suppliers and creditors shall be conducted transparently and without taking unfair advantage of any party.
• Procurement and contracting processes involving related parties shall be carried out based on the principles of equality, transparency, and fairness, with the objective of achieving the best interests of the Company. Such processes shall comply with the Company's procurement procedures and include adequate disclosure of verifiable information while avoiding conflicts with the Company's overall interests.
• Personnel involved in procurement and contracting activities must not receive any direct or indirect benefits from suppliers and must remain impartial, avoiding any close relationships that could influence decision-making.
• The Company shall strictly comply with all agreed terms and conditions. In cases where compliance is not possible, the Company shall promptly notify suppliers or creditors and jointly seek appropriate solutions.
• If any circumstance arises that may prevent compliance with contractual obligations, the person responsible must immediately report the matter to their supervisor.
• Information provided to suppliers and creditors regarding the Company must be accurate, complete, and truthful.
• The Company aims to maintain long-term relationships with suppliers and business partners that share common objectives regarding product quality, service excellence, and mutual trust.
• Company shall treat all creditors equitably and strictly comply with the terms and conditions agreed upon with each creditor to ensure that all transactions are conducted fairly, accurately, and transparently.

The Company conducts supplier and service provider selection in a fair, transparent, and auditable manner. Evaluation criteria encompass quality, business performance, and sustainability considerations to ensure that suppliers can effectively support the Company's operations and meet its standards. Key evaluation criteria include:

• Business partners include manufacturers, operators, distributors, agents, suppliers of goods and services, and subcontractors. They must maintain verifiable business premises and demonstrate a reliable business track record.
• Evaluation of product quality, service standards, on-time delivery performance, after-sales service, warranty provisions, and other mutually agreed conditions.
• Assessment of occupational health, safety, and environmental management systems.
• Assessment of legal compliance, business ethics practices, and consideration for human rights, society, and the environment.
• Suppliers must conduct business in accordance with fair competition principles.
• Suppliers must not have any conflict of interest with the Company's business, must not have records of fraudulent or corrupt practices, and must not appear on any government, private sector, or financial institution blacklist.
• Suppliers must respect and protect confidential information belonging to customers and business partners.

Suppliers and stakeholders who become aware of any conduct suspected to violate laws, regulations, business ethics, or Company policies may report concerns, suspected misconduct, or submit complaints through the designated channels established by the Company. The Company is committed to protecting whistleblowers and maintaining the confidentiality of all information in accordance with its policies.

Reporting Channels

By Post
Chairman of the Board, Chairman of the Audit Committee, or Chief Executive Officer and President
Sea Oil Public Company Limited
88 Bangna-Trad Soi 30, Debaratna Road, Bangna Tai, Bangna, Bangkok 10260, Thailand

By Email
Chairman of the Audit Committee: ruth@banomyong.com
Chief Executive Officer and President: neeracha@seaoilthailand.com
Compliance and Company Secretary Office: compliance@seaoilthailand.com

Company Website
https://www.seaoilthailand.com/th/corporate-governance/declaration-of-anti-corruption

Complaints may direct to:

• Chairman of the Audit Committee
• Chief Executive Officer and President
• Compliance and Company Secretary Office

The Company places great importance on protecting data and maintaining the confidentiality of business information belonging to suppliers, vendors, and service providers. Appropriate data management measures are implemented to prevent unauthorized access, disclosure, use, or transfer of information. The Company also complies with all applicable laws and regulations concerning personal data and business information protection.

Further details are available via the Company Website.

The Company is committed to treating suppliers fairly and equitably by ensuring that payments for goods and services are made in accordance with mutually agreed commercial terms. Efficient document verification and payment approval processes are maintained to support suppliers' financial liquidity and foster long-term business relationships.

The Company endeavors to settle payments within the contractual payment period and avoids actions that could adversely affect suppliers' business operations. Trade payables are continuously monitored and managed to maintain an appropriate balance between efficient working capital management and fair treatment of suppliers.

The Company promotes the procurement of environmentally friendly products and materials (Green Procurement), including office supplies and paper products certified under recognized environmental standards or Green Label schemes.

The Company also places importance on biodiversity conservation and the protection of water resources. Environmentally friendly chemical products used in operations, such as floor cleaners, dishwashing liquids, and restroom cleaning agents, are selected based on certified quality and environmental standards. Products carrying the Green Industry certification from the Ministry of Industry are prioritized, as they help reduce water contamination from chemical residues and disinfectants, improve water quality, reduce risks to human health and aquatic ecosystems, and contribute to safer habitats for aquatic life.

• In 2025, the Catering Business Group procured 289 environmentally friendly chemical product items, totaling THB 444,190 and representing 59.09% of its total chemical procurement.
• In 2025, the Company procured 815 environmentally friendly office supply items with a total procurement value of THB 88,835, representing 38.57% of total office supplies procurement.
• In 2025, the total procurement value of environmentally friendly products amounted to THB 533,025.

The Company is committed to promoting local employment as part of its contribution to community and economic development. By creating employment opportunities and supporting career advancement for local residents, the Group seeks to enhance quality of life, strengthen local economies, and help reduce social inequality.

In 2025, the Company employed a total of 189 local workers, contributing approximately THB 33.42 million in income to local communities.

Promoting Suppliers' Compliance with the Anti-Corruption Policy

Sea Oil Public Company Limited and subsidiaries (the "Group") are committed to conducting business with transparency, integrity, and good corporate governance, and maintain a zero-tolerance policy toward all forms of corruption. Recognizing that suppliers are an important part of the Group's supply chain and play a key role in supporting ethical and sustainable business operations, the Group promotes awareness and compliance with anti-corruption principles among its suppliers.

The Group encourages suppliers to comply with its Anti-Corruption Policy and the principles of Thailand's Private Sector Collective Action Against Corruption (CAC). Key suppliers are required to acknowledge and adhere to the Supplier Code of Conduct, anti-bribery practices, conflict of interest prevention measures, and all applicable laws and regulations.

To strengthen transparency and ethical business conduct throughout the supply chain, the Group regularly communicates its Anti-Corruption Policy to suppliers and requires new suppliers to acknowledge the Supplier Code of Conduct and Anti-Corruption Policy during the supplier selection process. Existing suppliers are also required to reaffirm their acknowledgment on an annual basis.

In 2025, 100% of key suppliers (Tier 1 Suppliers) acknowledged and signed the Supplier Code of Conduct and Anti-Corruption Policy.

Supplier Development and Capacity Building

The Group recognizes the importance of responsible procurement practices that respect human rights and promote fair labor standards throughout the supply chain. The Group does not support illegal labor, forced labor, or child labor and encourages suppliers to provide fair working conditions and maintain appropriate occupational health and safety standards.

To enhance suppliers' knowledge and capabilities, the Group organizes Supplier Day activities in collaboration with affiliated companies to share best practices on sustainable procurement and ethical business conduct. These initiatives support supplier development, strengthen competitiveness, and foster long-term partnerships, enabling both the Group and its suppliers to grow sustainably together.