Earnings release
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Amkor Technology Reports Financial Results for the Third Quarter 2026 TEMPE, Ariz. -- October 26, 2026 -- Amkor Technology, Inc. (Nasdaq: AMKR), a leading provider of semiconductor packaging and test services, today announced financial results for the third quarter ended September 30, 2026. Third Quarter 2026 Highlights • Net sales $1.99 billion • Gross profit $364 million, operating income $225 million • Net income $191 million, earnings per diluted share $0.76 • EBITDA $435 million “Amkor delivered a strong quarter, with record revenue in Computing and Automotive & Industrial end markets and continued margin expansion, despite expected weakness in Communications,” said Kevin Engel, Amkor’s president and chief executive officer. “We are executing on our strategy, advancing key customer programs and benefiting from expanding customer commitments that improve visibility and support disciplined investment to meet future demand.” Quarterly Financial Results Net sales $1,991 $1,898 $1,987 Gross margin 18.3% 16.8% 14.3% Operating income $225 $200 $159 Operating income margin 11.3% 10.5% 8.0% Net income attributable to Amkor $191 $174 $127 Earnings per diluted share $0.76 $0.70 $0.51 EBITDA (1) $435 $400 $340 ($ in millions, except per share data) Q3 2026 Q2 2026 Q3 2025 (1) EBITDA is a non-GAAP measure. The reconciliation to the comparable GAAP measure is included below under “Selected Operating Data.” At September 30, 2026, total cash and short-term investments was $2.4 billion, and total debt was $2.5 billion. The company paid a quarterly dividend of $0.08352 per share on September 22, 2026 . 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. During the third quarter of 2026, the company purchased approximately $32 million of common stock under its stock repurchase program. Business Outlook The following information presents Amkor’s guidance for the fourth quarter 2026 (unless otherwise noted): • Net sales of $1.9 billion to $2.0 billion • Gross margin of 18.0% to 19.0% • Net income of $160 million to $185 million, or $0.65 to $0.75 per diluted share • Full year 2026 capital expenditures updated to approximately $2.5 billion 1
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Conference Call Information Amkor will conduct a conference call on Monday, October 26, 2026, at 5:00 p.m. Eastern Time. This call may include material information not included in this press release. To access the live audio webcast and the accompanying slide presentation, visit the Investor Relations section of Amkor’s website, located at ir.amkor.com. The live call can also be accessed by dialing 1-877-407-4019 or 1-201-689-8337. About Amkor Technology, Inc. Amkor Technology, Inc. (Nasdaq: AMKR) is the world’s largest U.S. headquartered OSAT and is a global leader in outsourced semiconductor packaging and test services. With a strong track record of innovation, a broad and diverse geographic footprint and solid partnerships with lead customers, Amkor delivers high- quality solutions that enable the world’s leading semiconductor and electronics companies to bring advanced technologies to market. The company’s comprehensive portfolio includes advanced packaging, wafer-level processing, and system-in-package solutions targeting applications for smartphones, data centers, artificial intelligence, automobiles and wearables. For more information visit amkor.com. Investor Relations Jennifer Jue Vice President, Investor Relations 480-786-7594 jennifer.jue@amkor.com Media Relations Kris Pugsley Vice President, Marketing Communications 480-786-7499 kris.pugsley@amkor.com 2
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Q3 2026 Q2 2026 Q3 2025 Net Sales Data: Net sales (in millions): Advanced products (1) $ 1,632 $ 1,557 $ 1,684 Mainstream products (2) 359 341 303 Total net sales $ 1,991 $ 1,898 $ 1,987 Packaging services 88 % 88 % 89 % Test services 12 % 12 % 11 % Net sales from top ten customers 66 % 66 % 73 % End Market Distribution Data: Communications (smartphones, tablets) 37 % 42 % 51 % Computing (data center, infrastructure, PC/laptop, storage) 26 % 22 % 19 % Automotive, industrial and other (ADAS, electrification, infotainment, safety) 22 % 22 % 16 % Consumer (AR & gaming, connected home, home electronics, wearables) 15 % 14 % 14 % Total 100 % 100 % 100 % Gross Margin Data: Net sales 100.0 % 100.0 % 100.0 % Cost of sales: Materials 50.7 % 52.6 % 57.5 % Labor 10.1 % 10.0 % 9.2 % Depreciation 8.6 % 8.6 % 7.5 % Other manufacturing 12.3 % 12.0 % 11.5 % Gross margin 18.3 % 16.8 % 14.3 % (1) Advanced products include flip chip, memory and wafer-level processing and related test services. (2) Mainstream products include all other wirebond packaging and related test services. AMKOR TECHNOLOGY, INC. Selected Operating Data 3
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In this press release, we refer to EBITDA, which is not defined by U.S. GAAP. We define EBITDA as net income before interest expense, income tax expense and depreciation and amortization. We believe EBITDA to be relevant and useful information to our investors because it provides additional information in assessing our financial operating results. Our management uses EBITDA in evaluating our operating performance, and our ability to service debt, fund capital expenditures and pay dividends. However, EBITDA has certain limitations in that it does not reflect the impact of certain expenses on our consolidated statements of income, including interest expense, which is a necessary element of our costs because we have borrowed money in order to finance our operations, income tax expense, which is a necessary element of our costs because taxes are imposed by law, and depreciation and amortization, which is a necessary element of our costs because we use capital assets to generate income. EBITDA should be considered in addition to, and not as a substitute for, or superior to, operating income, net income or other measures of financial performance prepared in accordance with U.S. GAAP. Furthermore, our definition of EBITDA may not be comparable to similarly titled measures reported by other companies. Below is our reconciliation of EBITDA to U.S. GAAP net income. Non-GAAP Financial Measure Reconciliation: (in millions) Q3 2026 Q2 2026 Q3 2025 EBITDA Data: Net income $ 191 $ 175 $ 127 Plus: Interest expense 18 17 21 Plus: Income tax expense 39 28 28 Plus: Depreciation & amortization 187 180 164 EBITDA $ 435 $ 400 $ 340 AMKOR TECHNOLOGY, INC. Selected Operating Data 4
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For the Three Months Ended September 30, For the Nine Months Ended September 30, 2026 2025 2026 2025 Net sales $ 1,990,557 $ 1,986,968 $ 5,573,223 $ 4,819,935 Cost of sales 1,627,028 1,702,478 4,652,072 4,195,965 Gross profit 363,529 284,490 921,151 623,970 Selling, general and administrative 99,026 83,211 274,917 211,541 Research and development 39,792 42,352 121,382 130,012 Total operating expenses 138,818 125,563 396,299 341,553 Operating income 224,711 158,927 524,852 282,417 Interest expense 17,916 21,231 52,597 54,850 Other (income) expense, net (23,367) (16,701) (57,390) (35,833) Total other (income) expense, net (5,451) 4,530 (4,793) 19,017 Income before taxes 230,162 154,397 529,645 263,400 Income tax expense 39,243 27,715 79,891 59,813 Net income 190,919 126,682 449,754 203,587 Net income attributable to non-controlling interests (306) (93) (2,037) (1,453) Net income attributable to Amkor $ 190,613 $ 126,589 $ 447,717 $ 202,134 Net income attributable to Amkor per common share: Basic $ 0.77 $ 0.51 $ 1.81 $ 0.82 Diluted $ 0.76 $ 0.51 $ 1.79 $ 0.81 Shares used in computing per common share amounts: Basic 248,015 247,158 247,827 247,035 Diluted 249,526 248,302 249,712 248,054 AMKOR TECHNOLOGY, INC. CONSOLIDATED STATEMENTS OF INCOME (In thousands, except per share data) (Unaudited) 5
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September 30, 2026 December 31, 2025 ASSETS Current assets: Cash and cash equivalents $ 1,603,015 $ 1,378,347 Restricted cash 3,611 — Short-term investments 773,181 613,038 Accounts receivable, net of allowances 1,511,028 1,354,825 Inventories 603,792 437,797 Other current assets 125,153 100,754 Total current assets 4,619,780 3,884,761 Property, plant and equipment, net 4,697,784 3,870,808 Operating lease right of use assets 104,721 93,449 Goodwill 17,923 18,003 Restricted cash 198,118 67,776 Other assets 403,898 201,512 Total assets $ 10,042,224 $ 8,136,309 LIABILITIES AND EQUITY Current liabilities: Short-term borrowings and current portion of long-term debt $ 149,502 $ 162,430 Trade accounts payable 926,205 912,766 Capital expenditures payable 496,129 243,543 Short-term operating lease liability 21,279 23,140 Accrued expenses 535,401 370,093 Total current liabilities 2,128,516 1,711,972 Long-term debt 2,317,733 1,282,816 Pension and severance obligations 73,931 69,218 Long-term operating lease liabilities 62,221 48,549 Other non-current liabilities 623,631 517,467 Total liabilities 5,206,032 3,630,022 Stockholders’ equity: Preferred stock — — Common stock 295 294 Additional paid-in capital 2,036,526 2,054,051 Retained earnings 3,012,625 2,627,038 Accumulated other comprehensive income (loss) 15,868 16,833 Treasury stock (265,648) (227,110) Total Amkor stockholders’ equity 4,799,666 4,471,106 Non-controlling interests in subsidiaries 36,526 35,181 Total equity 4,836,192 4,506,287 Total liabilities and equity $ 10,042,224 $ 8,136,309 AMKOR TECHNOLOGY, INC. CONSOLIDATED BALANCE SHEETS (In thousands) (Unaudited) 6
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For the Nine Months Ended September 30, 2026 2025 Cash flows from operating activities: Net income $ 449,754 $ 203,587 Depreciation and amortization 537,115 476,277 Other operating activities and non-cash items (38,560) (113) Changes in assets and liabilities (79,964) (228,625) Net cash provided by operating activities 868,345 451,126 Cash flows from investing activities: Payments for property, plant and equipment (1,236,806) (472,531) Proceeds from sale of property, plant and equipment 35,993 5,142 Proceeds from foreign exchange forward contracts 46,902 51,947 Payments for foreign exchange forward contracts (43,245) (45,784) Payments for short-term investments (951,743) (588,012) Proceeds from sale of short-term investments 250,404 140,961 Proceeds from maturities of short-term investments 540,639 350,819 Other investing activities 13,671 2,941 Net cash used in investing activities (1,344,185) (554,517) Cash flows from financing activities: Proceeds from long-term debt 1,150,000 1,000,000 Payments of long-term debt (108,444) (360,527) Payments for debt issuance costs (21,287) (13,235) Payments for capped call transactions (56,350) — Payments of finance lease obligations (35,611) (44,246) Payments of dividends (62,101) (61,299) Payments for repurchase of common stock (32,328) — Other financing activities (367) (1,830) Net cash provided by financing activities 833,512 518,863 Effect of exchange rate fluctuations on cash, cash equivalents and restricted cash 949 6,630 Net increase in cash, cash equivalents and restricted cash 358,621 422,102 Cash, cash equivalents and restricted cash, beginning of period 1,446,123 1,134,312 Cash, cash equivalents and restricted cash, end of period $ 1,804,744 $ 1,556,414 AMKOR TECHNOLOGY, INC. CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (In thousands) (Unaudited) 7
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Forward-Looking Statement Disclaimer This press release contains forward-looking statements within the meaning of the federal securities laws. You are cautioned not to place undue reliance on forward-looking statements, which are often characterized by terminology such as “may,” “will,” “should,” “expects,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential,” “continue” or “intend,” by the negative of these terms or other comparable terminology or by discussions of strategy, plans or intentions. All forward-looking statements in this press release are made based on our current expectations, forecasts, estimates and assumptions. We assume no obligation to review or update any forward-looking statements to reflect events or circumstances occurring after the date of this press release, except as may be required by applicable law. Because such statements include risks and uncertainties, actual results may differ materially from those anticipated in such forward-looking statements as a result of various factors, including, but not limited to, the following: • dependence on the cyclical and volatile semiconductor industry and vulnerability to industry downturns and declines in global economic and financial conditions; • changes in costs, quality, availability and delivery times of raw materials, components and equipment; • fluctuations in operating results and cash flows; • competition with established competitors in the packaging and test business, the internal capabilities of integrated device manufacturers and other competitors, including foundries and contract manufacturers; • our substantial investments in equipment and facilities to support the demand of our customers; • warranty claims, product return and liability risks, and the risk of negative publicity if our products fail, as well as the risk of litigation incident to our business; • difficulty achieving the relatively high-capacity utilization rates necessary to realize satisfactory gross margins given our high percentage of fixed costs; • our absence of backlog and the short-term nature of our customers’ commitments; • the historical downward pressure on the prices of our packaging and test services; • fluctuations in our manufacturing yields; • a downturn or lower sales to customers in the automotive industry; • dependence on key customers or concentration of customers in certain end markets, such as mobile communications and automotive; • difficulty funding our liquidity needs; • challenges with integrating diverse operations; • dependence on international factories and operations, and risks relating to trade restrictions and regional conflict, including restrictive trade barriers, export controls, tariffs, customs and duties; • our ability to develop new proprietary technology, protect our proprietary technology, operate without infringing the proprietary rights of others and implement new technologies; • our continuing development and implementation of changes to, and maintenance and security of, our information technology systems; 8
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• restrictive covenants in the indentures and agreements governing our current and future indebtedness; • our substantial indebtedness; • the effect of interest rate increases on our variable rate indebtedness; • fluctuations in interest rates and changes in credit risk; • terms of our convertible notes could delay or prevent an otherwise beneficial takeover of us, may dilute the ownership interest of existing stockholders or may otherwise adversely affect the price of our common stock; • the capped call transactions entered into in connection with the issuance of our convertible notes subject us to counterparty risk; • the ability of certain of our stockholders to effectively determine or substantially influence the outcome of matters requiring stockholder approval; • the possibility that we may decrease or suspend our quarterly dividend; • difficulty attracting, retaining or replacing qualified personnel; • maintaining an effective system of internal controls; • any changes in tax laws, taxing authorities not agreeing with our interpretation of applicable tax laws, including whether we continue to qualify for conditional reduced tax rates, or any requirements to establish or adjust valuation allowances on deferred tax assets; • environmental, health and safety liabilities and expenditures; • conditions and obligations in connection with the receipt of government awards and incentives; and • natural disasters and other calamities, health conditions or pandemics, political instability, hostilities or other disruptions. Other important risk factors that could affect the outcome of the events set forth in these statements and that could affect our operating results and financial condition are discussed in the company’s Annual Report on Form 10-K for the year ended December 31, 2025 (the “Form 10-K”) and from time to time in our other reports filed with or furnished to the Securities and Exchange Commission (“SEC”). You should carefully consider the trends, risks and uncertainties described in this press release, the Form 10-K and other reports filed with or furnished to the SEC before making any investment decision with respect to our securities. If any of these trends, risks or uncertainties continues or occurs, our business, financial condition or operating results could be materially and adversely affected, the trading prices of our securities could decline, and you could lose part or all of your investment. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by this cautionary statement. We assume no obligation to review or update any forward-looking statements to reflect events or circumstances occurring after the date of this press release except as may be required by applicable law. 9