SASB

IF-EN. Engineering & Construction Services

Sustainability Disclosure Topics and Metrics

Reporting Metric Reported Information
1. Environmental Impacts of Project Development
IF-EN-160a.1

Number of incidents of non-compliance with environmental permits, standards, and regulations
As of 2024, there was one case involving a final court ruling for a violation of the Clean Air Conservation Act that occurred in 2021. However, there was no impact arising from this matter in 2025.
IF-EN-160a.2

Discussion of processes to assess and manage environmental risks associated with project design, siting, and construction
HL D&I Halla has established an environmental management system and an incident response system to identify and manage environmental risks that may arise in the course of its business operations. Through its environmental management system, the Company monitors and manages environmental indicators relating to air quality, water resources, waste, hazardous chemicals, and soil contamination. Environmental impact assessments are conducted at all project sites prior to the commencement of business activities to identify relevant risks in advance, establish improvement targets, and implement action plans. In addition, the Company conducts simulation drills under its incident response system to ensure prompt responses to environmental pollution and incidents, thereby maintaining strict compliance with environmental laws and regulations.
2. Structural Integrity & Safety
IF-EN-250a.1

Amount of defect- and safety-related rework costs
As of 2025, defect- and safety-related rework costs amounted to KRW 4.33 billion.
IF-EN-250a.2

Total amount of monetary losses as a result of legal proceedings associated with defect- and safety-related incidents
As of 2025, the total monetary losses amounted to KRW 2.15 billion.
3. Workforce Health & Safety
IF-EN-320a.1

(1) Total recordable incident rate (TRIR) and (2) fatality rate for (a) direct employees and (b) contract employees
Industrial Accident Rate: 0.40%
ESG DATA PACK > Social Data > Safety > Work-related Fatalities and Injuries
4. Lifecycle Impacts of Buildings & Infrastructure
IF-EN-410a.1

(1) Number of commissioned projects certified to a third-party multi-attribute sustainability standard and,
(2) number of active projects seeking such certification
A total of 23 projects have received Green Building Certification.
IF-EN-410a.2

Discussion of processes to incorporate operational-phase energy and water efficiency considerations into project planning and design
HL D&I Halla actively develops and adopts environmentally friendly technologies to improve resource and energy efficiency. The Company has introduced the PRS construction method to reduce waste generation and improve the efficiency of resource inputs compared with conventional construction methods. It has also adopted curing sheets made of highly insulating thermoplastic materials to improve energy efficiency during the concrete curing process. At project sites, the Company manages fugitive dust, noise, and vibration through IoT-based monitoring systems and implements customized mitigation strategies.
5. Climate Impacts of Business Mix
IF-EN-410b.1

Amount of backlog for (1) hydrocarbon-related projects and
(2) renewable energy projects
As of 2025, the Company had no order backlog for such projects.
IF-EN-410b.2

Amount of backlog cancellations associated with hydrocarbon-related projects
As of 2025, the Company had no canceled order backlog associated with hydrocarbon-related projects.
IF-EN-410b.3

Amount of backlog for non-energy projects associated with climate change mitigation
As of 2025, the Company had no order backlog for non-energy projects associated with climate change mitigation.
6. Business Ethics
IF-EN-510a.1

(1) Number of active projects and
(2) order backlog in countries ranked among the 20 lowest in Transparency International’s Corruption Perceptions Index
As of 2025, the Company had no projects in countries ranked among the 20 lowest in Transparency International’s Corruption Perceptions Index.
IF-EN-510a.2

Total amount of monetary losses as a result of legal proceedings associated with charges of (1) bribery or corruption and (2) anti-competitive practices
As of 2025, there were no applicable cases.
IF-EN-510a.3

Description of policies and practices for the prevention of (1) bribery and corruption and (2) anti-competitive behavior in project bidding processes
HL D&I Halla shares the Code of Ethics and Guidelines for Ethical Conduct established at the Group level to practice integrity management. The Code of Ethics establishes compliance requirements and standards for value judgments applicable to employees, suppliers, and other stakeholders, while the Guidelines for Ethical Conduct provide specific procedures and standards of behavior. Further information on the Code of Ethics and Guidelines for Ethical Conduct is available in the Integrity and Ethical Management section of this Report and on the HL Group Integrity Management website.

Activity Metrics

Reporting Metric Reported Information
1.
IF-EN-000.A

Number of active projects
As of 2025, 53 projects were in progress.
2.
IF-EN-000.B

Number of commissioned projects during the reporting period
As of 2025, 17 projects were completed.
3.
IF-EN-000.C

Total order backlog
As of 2025, the total order backlog was approximately KRW 6.3 trillion.