ASE Technology : ESG Report 2021

Circular

Low Carbon

Collaborative

Inclusive

Committed to a Win-Win

Sustainable Future

As a leading global service provider of semiconductor assembly and testing, ASE Technology Holding Co., Ltd. and its subsidiaries (collectively ASEH) are fully committed to building its core business and strengthening research and development. The company continues to advance its corporate sustainability strategy through a framework that comprises four pillars - Low Carbon, Circular, Inclusive and Collaborative. This year, we have conducted Employee Engagement Survey, published TCFD Report, implemented Water Risk Analysis of Facilities Worldwide, established ASE Social Enterprise Co., Ltd., and acquired Cybersecurity Insurance. ASEH intends to respond proactively to industry trends and stay abreast of social changes, as well as implement social responsibility and contribute to positive social and environmental impacts.

To highlight ASEH's proactive efforts to contribute to environmental sustainability, including promoting water source recycling, planting trees with its employees, enforcing energy conservation and carbon reduction, nurturing biodiversity, and introducing smart technologies, the cover design of this Report was based on the themes of sustainable earth, green technology, and the city of lights, along with the origins of life on earth, water and forest. At the same time, ASEH's continues to focus on research and development and innovative culture, making contributions to industrial technology advancements, and like the lights that illuminate the city, offering hope for green and sustainable living.

TABLE OF CONTENTS

04 ABOUT OUR REPORTING

08 LETTER FROM THE CHAIRMAN

		10	OPERATING MODEL	1		64	INNOVATION SERVICE		4			120	RESPONSIBLE PROCUREMENT	7
																7.1	Supply Chain Overview
		10	1.1	Company Profile		65	4.1	R&D and Innovation				122
		12	1.2	Mission and Vision				72	4.2	Sustainable Manufacturing					123	7.2	Supply Chain Management Framework
		13	1.3	Financial Performance				76	4.3	Products and Services					126	7.3	Sustainable Supply Chain Management
																		132	7.4	Conflict Minerals Compliance
		14	SUSTAINABLE GOVERNANCE						GREEN MANUFACTURING AND
2	14	2.1	Organization and Structure				78	LOW-CARBON TRANSFORMATION			134	CORPORATE CITIZENSHIP
		5
		81	5.1	Climate Leadership			8		8.1	Social Involvement Overview
		20	2.2	Sustainability Strategies			138
					89	5.2	Water Resource
		24	2.3	UN Sustainable Development Goals and					139	8.2	Environmental Conservation
			5.3	Waste Management
				Sustainable Value Assessment				92					142	8.3	Industry-Academia Collaborations
			2.4	Materiality Assessment and Stakeholder		5.4	Air Emissions Control
		31	95					145	8.4	Community Engagement
				Communication				96	5.5	Green Facility					147	8.5	Public Advocacy
										5.6	Biodiversity
		36	INTEGRITY AND ACCOUNTABILITY				97
					98	5.7	Environmental Expenditures and			150	APPENDIX : Environmental Data
						3					Investments
		38	3.1	Board of Directors									154	APPENDIX : Social Data
														161	APPENDIX : Supply Chain Data
		41	3.2	Economic Performance and Tax				100	INCLUSIVE WORKPLACE
										APPENDIX : Critical Supplier List
				Governance								162
												6
		43	3.3	Business Ethics				102	6.1					163	Third Party Assurance Statement
		46	3.4	Risk Management				Talent Attraction and Retention			164	GRI Content Index
					113	6.2	Talent Cultivation and Development
		54	3.5	Human Rights Management						172	Sustainability Accounting Standards Board
					116	6.3	Occupational Health and Safety
		60	3.6	Regulatory Compliance						173	Contact Information

61 3.7 Information Security Management

Employee Engagement Survey

In recent years, talent risks have become a key focus of ASEH as employees form the core of the company's sustainability development and competitive advantage. To create a business environment that supports employee welfare and improves management resilience, ASEH began conducting employee engagement surveys once every two years from 2017. In 2021, we introduced a new framework and new measurement indicators, restructuring the employee survey to a sustainability engagement survey. The sustainability survey is conducted across the 3 main subsidiaries of ASEH, covering 26 factories worldwide and all employees in 8 countries (including direct and indirect employees). An indicator measuring employees' understanding of the company's ESG policy was also added to the current employee engagement survey to help us better understand their opinions. Based on employee feedback, areas of improvement in the work environment or management policies can be identified and addressed effectively. As a result, employees will feel empowered to handle greater responsibilities, embrace change and continue to make improvements, optimizing ASEH's performance in sustainability.

TCFD Report

ASEH is committed to taking mitigation and adaptation actions against climate change and internalizing climate risk management and solutions in our facilities worldwide. To facilitate our climate disclosures, we have adopted the recommendations and framework of the Financial Stability Board's Task Force on Climate-related Financial Disclosures (TCFD). Our first TCFD Report, published this year, highlights our operational management and strategic actions, product development and innovation, value chain engagement and net zero goals. The report emphasizes our commitment to fulfill climate leadership in response to stakeholders' call to action and we hope to inspire more businesses around the world to join our net zero mission. Regarding our carbon reduction practices, ASEH has adopted woodlands to analyze the amount of carbon captured and stored, conduct feasibility studies and formulate device carbon sequestration strategies for the future. At the same time, we place equal importance on biodiversity risks from all aspects of our business including operations and social welfare initiatives, and we will devote considerable efforts to activities for biodiversity conservation.

Water Risk Analysis of Facilities Worldwide

To gain precise insights into water risks at our facilities worldwide, we performed a water risk analysis using the Aqueduct risk assessment tool developed by the World Resource Institute (WRI) as well as NASA's climate data. The analysis helps us to understand the water consumption and characteristics of water resources at each facility, thereby allowing us to identify areas vulnerable to the risks of water shortages. The water stress levels of the facilities are assessed in totality with regional and operational risks to determine appropriate response strategies and adaptation pathways for climate risks.

2

Key Highlights

In this report, we discuss our sustainability activities in 2021.

Establishing ASE Social Enterprise Co., Ltd. and Executing Social

Welfare Projects

This year, ASEH began preparations for the establishment of the ASE Social Enterprise Co., Ltd., applying an innovative business model to advance sustainable development, promote social inclusion, and address environmental problems. In memory of Madam Chang Yao Hung-Ying, the founder of the ASE Group, and her unyielding entrepreneurship, we are planning to launch a "Sustainable Entrepreneurship Competition and Dream Ambition Fulfilment Program for Women."The program is aimed at inspiring innovative thinking in women, encouraging entrepreneurship, and building an inclusive and vibrant entrepreneurial environment. In the meantime, we continued to launch campus sustainability programs, and worked with socially responsible universities to build renewable energy-powered aquaponics farms in elementary schools to promote education on sustainable food production and farming. Smart energy-saving guidance and environmental education programs are offered to schools in rural areas, helping them save more than 6% of electricity consumption. As long-term advocates of disadvantaged students who live in rural areas, we support school assistance programs such as after-school programs, to improve their learning environment and quality of life that would lead to a better future.

Information Security Management

Given the trend of digital transformation, ASEH continuously improves information technology (IT) and applies cybersecurity experiences to operational technology (OT). We started planning and conducting OT cybersecurity evaluation in stages. This involves inspections and tests by external experts to reduce any potential threats and risks in our OT cybersecurity environment. In 2021, ASEH began developing an organization-level process for classifying, reporting, and responding to cybersecurity incidents. Relevant management mechanisms will be adopted to ensure that cybersecurity incidents are handled in a timely manner so as to reduce risks and minimize the scope of damage. Recently, we planned an automated system for collecting and transmitting cybersecurity information in real-time to improve the company's overall cybersecurity capability and develop a horizontal joint defense mechanism. In light of the cybersecurity risks and challenges facing business entities, ASEH adopted a cyber liability insurance policy as the last line of defense, with risk management as the starting point. Such a policy is expected to help us respond to and control the impact of a cybersecurity incident. It provides insurance coverage to reduce any possible cybersecurity losses sustained by the company, customers, and suppliers, thereby enabling us to quickly restore business operations.

Industry Leader

Named Industry Leader in the 2016-2021 Dow Jones Sustainability Indices, and listed as a constituent of the Dow Jones Sustainability World Index and Emerging Markets Index

Top 1% S&P Global

Gold Class

Listed on the S&P Global Sustainability Yearbook 2016-2021, and awarded the "Gold Class" for six consecutive years (within 1% of top performing company's score under the Semiconductors and Semiconductor Equipment Industry Group)

Triple Leadership Status

In 2021, ASEH received recognition from the CDP for leadership on Climate Change and Water Security, and continued to be amongst the highest rated companies listed on the

• Maintained leadership position on climate change for six consecutive years
• Recognized on the water security A List for two consecutive years
• Rated 'A' in Supplier Engagement Rating for three consecutive yearsSupplier Engagement Rating Leaderboard

8 Awards

Received 2021 Taiwan Corporate Sustainability Awards (TCSA): Top 10 Domestic Companies Sustainability Model Award (Manufacturing Industry), Growth through Innovation Award, Supply Chain Management Award, Social Inclusion Award, Climate Leadership Award, Circular Economy Leadership Award, Corporate Sustainability Report Award (Platinum) and GCSA Sustainability Reporting Award (Gold)

2021 Awards and Recognitions

Gold Award

At the 1st Taiwan Sustainability Action Awards (TSAA), ASEH received a Gold award for the company's low-carbon transition towards net-zero emissions demonstrated through measurable actions to combat climate change and its impacts (UN SDG

13). The TSAA was organized by the Taiwan Institute for Sustainable Energy (TAISE)

7 Years in a Row

Included in the FTSE4GOOD Emerging Markets Index for seven years in a row (2015-2021)

4 Consecutive Years

Listed on the 2018-2021 FTSE4Good TIP Taiwan ESG Index [The index has been developed in partnership with Taiwan Stock Exchange's (TWSE) wholly-owned subsidiary, Taiwan Index Plus Corp. (TIP)]

Awarded Three Times

Received the 2021 Asia Responsible Enterprise Awards - Corporate Governance and Green Leadership hosted by Enterprise Asia

3