ASE Technology : 2021 Financial Report (IFRS)

ASE Technology Holding Co., Ltd. and Subsidiaries

Consolidated Financial Statements as of December 31, 2020 and 2021 and for the Years Ended December 31, 2019, 2020 and 2021 and

Reports of Independent Registered Public Accounting Firms

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Directors of

ASE Technology Holding Co., Ltd.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of ASE Technology Holding Co., Ltd. (a corporation incorporated under the laws of the Republic of China) and its subsidiaries (collectively, the "Group") as of December 31, 2020 and 2021, the related consolidated statements of comprehensive income, changes in equity and cash flows for each of the three years in the period ended December 31, 2021, and the related notes (collectively referred to as the "Consolidated Financial Statements") (all expressed in New Taiwan Dollars). In our opinion, based on our audits and the report of other auditors, the Consolidated Financial Statements present fairly, in all material respects, the financial position of the Group as of December 31, 2020 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021, in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

We did not audit the consolidated financial statements of Siliconware Precision Industries Co., Ltd. and its subsidiaries (collectively, "SPIL"), a wholly owned subsidiary, which statements reflect total assets constituting 22% and 22% of the Group's consolidated total assets as of December 31, 2020 and 2021, respectively, and total revenue constituting 22%, 21% and 19% of the Group's consolidated revenues for the years ended December 31, 2019, 2020 and 2021, respectively. The consolidated financial statements of SPIL were audited by other auditors whose report has been furnished to us, and our opinion, insofar as it relates to the amounts included for SPIL, is based solely on the report of other auditors.

Our audits also comprehended the translation of New Taiwan dollar amounts into U.S. dollar amounts and, in our opinion, such translation has been made in conformity with the basis stated in Note 4 to the Consolidated Financial Statements. Such U.S. dollar amounts are presented solely for the convenience of the readers outside the Republic of China.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Group's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 25, 2022, expressed an unqualified opinion on the Group's internal control over financial reporting based on our audit and the report of other auditors.

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Basis for Opinion

These Consolidated Financial Statements are the responsibility of the Group's management. Our responsibility is to express an opinion on the Group's Consolidated Financial Statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Group in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the Consolidated Financial Statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the Consolidated Financial Statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the Consolidated Financial Statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the Consolidated Financial Statements. We believe that our audits and the report of other auditors provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the Consolidated Financial Statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the Consolidated Financial Statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Goodwill - Packaging and Testing Segments - Refer to Notes 4, 5, 18, 29 and 30 to the Consolidated Financial Statements

Critical Audit Matter Description

The Group's evaluation of goodwill for impairment involves the comparison of the value in use of each segment to its carrying value. The Group used the discounted cash flow model to estimate value in use, which requires management to make significant estimates and assumptions related to discount rates and forecasts of future revenues. Changes in these assumptions could have a significant impact on either the value in use, the amount of any goodwill impairment charge, or both. The goodwill balance was NT$52,072,413 thousand (US$1,877,161 thousand) as of December 31, 2021, of which NT$35,412,424 thousand (US$1,276,584 thousand) and NT$13,304,040 thousand (US$479,598 thousand) were allocated to the packaging and testing segments, respectively. The value in use of the packaging and testing segments exceeded their carrying values as of the measurement date and, therefore, no impairment was recognized.

We identified the valuation of goodwill for the Group's packaging and testing segments as a critical audit matter due to the significant estimates and assumptions management makes to estimate the value in use of the packaging and testing segments and the sensitivity of their operations to changes in demand. Auditing management's judgments related to the selection of the discount rates and forecasts of future revenues for the packaging and testing segments required a high degree of auditor judgment and an increased extent of effort, including the need to involve our fair value specialists.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the discount rates and forecasts of future revenues used by management to estimate the value in use of the packaging and testing segments included the following, among others:

•  We tested the design and operating effectiveness of controls over management's goodwill impairment evaluation, including those over the determination of the value in use of the packaging and testing segments, such as controls related to management's selection of the discount rate and assessment on the reasonableness of forecasts of future revenue.

•  We evaluated management's ability to accurately forecast future revenues of the packaging and testing segments by comparing their actual results to management's historical forecasts.

•  We performed sensitivity analyses to evaluate the risk of impairment if key assumptions are changed.

•  With the assistance of our fair value specialists, we evaluated the reasonableness of the discount rates by performing certain procedures, including:

  • - Testing the source information underlying the determination of the discount rates and the mathematical accuracy of the calculation.

  • - Developing a range of independent estimates and comparing those to the discount rates selected by management.

/s/Deloitte & Touche Taipei, Taiwan Republic of China March 25, 2022

We have served as the Group's auditor since 1984.

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholder of

Siliconware Precision Industries Co., Ltd.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Siliconware Precision Industries Co., Ltd. and its subsidiaries (the "Company") as of December 31, 2021 and 2020, and the related consolidated statements of comprehensive income, of changes in equity and of cash flows for each of the three years in the period ended December 31, 2021, including the related notes (collectively referred to as the "consolidated financial statements") (not presented herein). We also have audited the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021 in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31 ,2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Annual Report on Internal Control over Financial Reporting (not presented herein). Our responsibility is to express opinions on the Company's consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a