Page 1

ASE Technology Holding Co. , Ltd. Investor Relations Contact : ir@aseglobal.com Tel : +886.2.6636.5678 http://www.aseglobal.com ASE Technology Holding Co. , Ltd. Reports Unaudited Consolidated Financial Results for the Third Quarter of 2021 Taipei , Taiwan , R.O.C. , October 28 , 2021 - ASE Technology Holding Co. , Ltd. ( TAIEX : 3711 , NYSE : ASX ) ( “ We ” , “ ASEH ” , or the “ Company ” ) , the leading provider of semiconductor manufacturing services in assembly and test , today reported unaudited net revenues¹ of NT $ 150,665 million for 3Q21 , up by 22 % year - over - year and up by 19 % sequentially . Net income attributable to shareholders of the parent for the quarter totaled NT $ 14,176 million , up from a net income attributable to shareholders of the parent of NT $ 6,712 million in 3Q20 and up from a net income attributable to shareholders of the parent of NT $ 10,338 million in 2Q21 . Basic earnings per share for the quarter were NT $ 3.29 ( or US $ 0.236 per ADS ) , compared to NT $ 1.57 for 3Q20 and NT $ 2.40 for 2Q21 . Diluted earnings per share for the quarter were NT $ 3.20 ( or US $ 0.230 per ADS ) , compared to NT $ 1.54 for 3Q20 and NT $ 2.30 for 2Q21 . RESULTS OF OPERATIONS 3Q21 Results Highlights - Consolidated • Net revenue contribution from packaging operations , testing operations , EMS operations • and others , each represented approximately 49 % , 9 % , 41 % and 1 % , respectively , of total net revenues for the quarter . Cost of revenue was NT $ 119,881 million for the quarter , up from NT $ 102,122 million in 2Q21 . Raw material cost totaled NT $ 73,552 million for the quarter , representing 49 % of total net revenues . Labor cost totaled NT $ 16,955 million for the quarter , representing 11 % of total net revenues . Depreciation , amortization and rental expenses totaled NT $ 12,710 million for the quarter . • Gross margin increased 0.9 percentage points to 20.4 % in 3Q21 from 19.5 % in 2Q21 . Operating margin was 12.2 % in 3Q21 , compared to 10.4 % in 2Q21 . ● In terms of non - operating items : - Net interest expense was NT $ 562 million . 1 All financial information presented in this press release is unaudited , consolidated and prepared in accordance with Taiwan - IFRS ( International Financial Reporting Standards as endorsed for use in the R.O.C. ) . Such financial information is generated internally by us and has not been subjected to the same review and scrutiny , including internal auditing procedures and audit by our independent auditors , to which we subject our audited consolidated financial statements , and may vary materially from the audited consolidated financial information for the same period . Any evaluation of the financial information presented in this press release should also take into account our published audited consolidated financial statements and the notes to those statements . In addition , the financial information presented is not necessarily indicative of our results of operations for any future period . 1