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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 First Quarter of 2021 Taipei , Taiwan , R.O.C. , April 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 $ 119,470 million for 1Q21 , up by 23 % year - over - year and down by 20 % sequentially . Net income attributable to shareholders of the parent for the quarter totaled NT $ 8,565 million , up from a net income attributable to shareholders of the parent of NT $ 3,899 million in 1Q20 and down from a net income attributable to shareholders of the parent of NT $ 10,044 million in 4Q20 . Basic earnings per share for the quarter were NT $ 1.99 ( or US $ 0.141 per ADS ) , compared to NT $ 0.92 for 1Q20 and NT $ 2.35 for 4Q20 . Diluted earnings per share for the quarter were NT $ 1.94 ( or US $ 0.137 per ADS ) , compared to NT $ 0.89 for 1Q20 and NT $ 2.30 for 4Q20 . RESULTS OF OPERATIONS 1Q21 Results Highlights - Consolidated • Net revenue contribution from packaging operations , testing operations , EMS operations • • ● and others , each represented approximately 50 % , 9 % , 40 % and 1 % , respectively , of total net revenues for the quarter . Cost of revenue was NT $ 97,442 million for the quarter , down from NT $ 125,578 million in 4Q20 . Raw material cost totaled NT $ 55,635 million for the quarter , representing 47 % of total net revenues . Labor cost totaled NT $ 15,788 million for the quarter , representing 13 % of total net revenues . Depreciation , amortization and rental expenses totaled NT $ 12,045 million for the quarter . Gross margin increased 2.7 percentage points to 18.4 % in 1Q21 from 15.7 % in 4Q20 . Operating margin was 9.3 % in 1Q21 , compared to 7.6 % in 4Q20 . In terms of non - operating items : - Net interest expense was NT $ 572 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