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Press Releases Amkor Technology Reports Financial Results for the First Quarter 2021 First Quarter Highlights Record first quarter net sales $ 1.33 billion , up 15 % year - on - year • Gross margin 20.0 % , operating income margin 10.9 % • Net income $ 120 million , earnings per diluted share $ 0.49 ⚫ EBITDA $ 280 million TEMPE , Ariz .-- ( BUSINESS WIRE ) -- Apr . 26 , 2021-- Amkor Technology , Inc. ( NASDAQ : AMKR ) , a leading provider of semiconductor packaging and test services , today announced financial results for the first quarter ended March 31 , 2021 . " Amkor delivered a first quarter revenue record of $ 1.33 billion , a 15 % increase over the first quarter of last year , " said Giel Rutten , Amkor's president and chief executive officer . " Continued strength in Advanced packaging and year - on- year growth of 13 % in our Mainstream business led to better than seasonal results in Communications and to sequential growth in Automotive & Industrial , Consumer , and Computing end markets . " Results Q1 2021 Q4 2020 ( 1 ) Q1 2020 ( $ in millions , except per share data ) Net sales $ 1,326 $ 1,371 $ 1,153 Gross margin 20.0 % 20.3 % 16.4 % Operating income $ 144 $ 159 $ 84 Operating income margin 10.9 % 11.6 % 7.3 % Net income attributable to Amkor $ 120 $ 127 $ 64 Earnings per diluted share $ 0.49 $ 0.52 $ 0.26 EBITDA ( 2 ) $ 280 $ 288 $ 210 ( 1 ) Q4 2020 net income includes a $ 20 million discrete income tax benefit , or $ 0.08 per diluted share , primarily related to changes in the valuation of certain deferred tax assets . ( 2 ) EBITDA is a non - GAAP financial measure . The reconciliation to the comparable GAAP financial measure is included below under " Selected Operating Data . " " We continued to operate at high utilization rates across our factories in the quarter , driving significant improvement in year - on - year profitability to 20 % gross margin and 11 % operating income margin . EPS of $ 0.49 is a first quarter record , " said Megan Faust , Amkor's executive vice president and chief financial officer . " Strong operating results and a solid balance sheet provide us the ability to invest in future growth , particularly for Advanced packaging technologies . " At March 31 , 2021 , total cash and short - term investments was $ 0.8 billion , and total debt was $ 1.1 billion . We paid a quarterly dividend of $ 0.04 per share , representing a dividend payment of $ 9.7 million in the aggregate , on March 15 , 2021 to stockholders of record as of February 23 , 2021. The declaration and payment of future dividends , as well as any record and payment dates , are subject to the approval of the Board of Directors . Business Outlook " We believe the second quarter will be another solid quarter , with revenue of $ 1.34 billion at the midpoint of our guidance . Our forecast reflects capacity constraints in wafers and substrates that are expected to affect portions of the supply chain in the near term , and we are working closely with our customers and suppliers to mitigate the impact , " said Rutten . " Overall , we continue to see solid demand across all of our key markets and remain confident that our strong position in Advanced packaging will enable us to outgrow the semiconductor market in 2021. " Second quarter 2021 outlook ( unless otherwise noted ) :