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1© 2025 Amkor Technology, Inc. © 2025 Amkor Technology, Inc. October 2025 Enabling the Future Amkor Technology Investor Presentation
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2© 2025 Amkor Technology, Inc. Disclaimer Non-GAAP Measures This presentation contains certain measures that are not defined terms under U.S. generally accepted accounting principles (“GAAP”). These non-GAAP measures should not be considered in isolation or as a substitute for, or superior to, measures of liquidity or performance prepared in accordance with U.S. GAAP and may not be comparable to calculations of similarly titled measures by other companies. See the Appendix for a description of these financial measures and a reconciliation of all such non-GAAP financial measures to the most directly comparable U.S. GAAP financial measures. Forward-Looking Statement Disclaimer This presentation 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 presentation are made based on our current expectations, forecasts, estimates and assumptions. 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 those set forth in our Annual Report on Form 10-K for the year ended December 31, 2024 (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 presentation, 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 presentation, except as may be required by applicable law.
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3© 2025 Amkor Technology, Inc. Amkor at a Glance Note: OSAT is defined as Outsourced Semiconductor Assembly and Test 1 Reflects 2019-24 Advanced Packaging revenue CAGR U.S. based manufacturing coming soon US Largest Headquartered OSAT Investing for our future Advanced technology supporting HPC, SiP and Test Trusted Partner Global semiconductor companies rely on Amkor Advanced Packaging Revenue CAGR1 16% 82% 2024 Advanced Packaging % of Revenue $744M 2024 CapEx Global OSAT Broad geographic footprint in 8 countries of experience packaging and testing semiconductors +55Years $6.3B 2024 Revenue
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4© 2025 Amkor Technology, Inc. Generative AI and Connected Trends Source: Gartner, McKinsey Increasing Total Addressable Market Smartphones Data Centers Laptop Desktop Mobile Gaming Home Audio AI 5G $0 $500 $1,000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 2030E Semiconductor Market ($ in billions) $1 Trillion
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5© 2025 Amkor Technology, Inc. Packaging and Test Integral to Semiconductor Supply Chain Smartphone & Tablet Hyperscalers, PC Automotive Consumer Electronics Original Equipment Manufacturers Fabless IDM Semiconductor Companies Wafer Foundry IDM Fab Wafer Manufacturing EMS Final Product Assembly Early design engagement with OEMs and semiconductor companies enhances packaging innovation OSAT IDM Factory Packaging and Test
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6© 2025 Amkor Technology, Inc. Drop Ship Design Innovation Final Test Burn-in, SLT Materials Management Wafer Bump, Probe, Dicing Package Assembly Amkor’s Turnkey Service Offering Reduce Cycle Time, Increase Value Memory 2.5D, High-Density Fan- Out Flip Chip, PoP MCM SiP, Heterogeneous Integration WLFO MEMS & Sensors Leadframe, Power
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7© 2025 Amkor Technology, Inc. Executing Our Strategy to Deliver Shareholder Value Tier 1 OSAT with complete Advanced packaging and test portfolio Trusted innovation partner for industry leaders Proven operational excellence track record Broadest OSAT geographic footprint Expanding in U.S., Korea and Portugal Well positioned to enable regional supply chains 5G communications HPC and AI Automotive electronics IoT devices Technology Leverage Advanced Packaging Leadership Markets Focus on Industry Megatrends Geographic Footprint Support Global & Enable Local Supply Chains
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8© 2025 Amkor Technology, Inc. Amkor is an Advanced Packaging Leader Optimize Power, Performance and Area with Packaging Design & Materials Heterogeneous Integration Larger Module Size or Miniaturization Enhanced Material Performance Increased Silicon Complexity
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9© 2025 Amkor Technology, Inc. Broad Geographic Footprint 13 Million Square Feet (1.2M sqm) of Manufacturing Space Assembly & Test Facility Amkor Headquarters Customer Support Center PORTUGAL 0.52M sf (0.05M sqm) UNITED STATES COMING SOON! MALAYSIA 0.43M sf (0.04M sqm) PHILIPPINES 1.32M sf (0.12M sqm) VIETNAM 1.47M sf (0.14M sqm) TAIWAN 1.17M sf (0.11M sqm) SHANGHAI 1.40M sf (0.13M sqm) JAPAN 1.77M sf (0.16M sqm) KOREA 4.48M sf (0.42M sqm)
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10© 2025 Amkor Technology, Inc. Diversified End Markets Leveraged to Industry Megatrends 2024 Results Communications Smartphones l Tablets 48% Computing Data Center I Infrastructure PC/Laptops I Storage 15% Automotive & Industrial ADAS I Electrification Infotainment l Safety 18% Consumer A/R & Gaming I Connected Home I Home Electronics I Wearables 19%
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11© 2025 Amkor Technology, Inc. Communications Amkor Supports All Smartphone Functions Megatrend Drivers Increasing performance requirements 5G and RF functionality On-device AI Baseband Modem Wireless Charging AI Apps Processor Storage Sub-system Modules Sensors RF Front End Sub-6 Ghz & mmWave 5G 4G 6G
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12© 2025 Amkor Technology, Inc. High Performance Computing Amkor’s Capabilities Support All Big Data Requirements Megatrend Drivers Data routing and networking Custom silicon solutions, new fabless entrants AI inference and training Power Delivery AI PC Hetero- geneous Integration Cloud ComputingNetwork Switches HyperscaleARM Artificial Intelligence AI Accelerators
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13© 2025 Amkor Technology, Inc. Automotive Electrification Amkor is a Leading Automotive OSAT Megatrend Drivers Infotainment, telematics, digital cockpit Electrification Autonomous functionality LIDAR Radar Power Modules V2X In-car Networking Domain Controllers EV ADAS SiC
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14© 2025 Amkor Technology, Inc. IoT Consumer Products Amkor is Enabling the Proliferation of IoT Hearables, wearables, fitness and health, smart homes Connected everything Ultra small form factor with multiple functions Megatrend Drivers Connectivity Security GPS Wireless Charging System Modules Health Sensor PMIC Apps Processor
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15© 2025 Amkor Technology, Inc. Trusted Partner to Global Semiconductor Companies
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16© 2025 Amkor Technology, Inc. CapEx Supports Growth and Innovation $472 $553 $780 $908 $749 $744 11.7% 10.9% 12.7% 12.8% 11.5% 11.8% 2019 2020 2021 2022 2023 2024 Capital Expenditures ($ in millions) Captial Expenditures Capital Intensity % Expanding in the U.S., Korea and Portugal Advanced Technology supporting the HPC market, SiP, Test Key Areas of Investment $950M Expect 2025 Capital Expenditures(2) of Around (1) See corresponding endnotes on slide 25.
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17© 2025 Amkor Technology, Inc. Financial Results ($ in millions except for EPS) $4,053 $5,051 $6,138 $7,092 $6,503 $6,318 2019 2020 2021 2022 2023 2024 Revenue $0.50 $1.40 $2.62 $3.11 $1.46 $1.43 2019 2020 2021 2022 2023 2024 EPS $233 $457 $763 $897 $470 $438 5.8% 9.1% 12.4% 12.7% 7.2% 6.9% 2019 2020 2021 2022 2023 2024 Operating Income Operating Income Operating Margin (3) See corresponding endnotes on slide 25. $649 $901 $1,226 $1,330 $943 $933 16.0% 17.8% 20.0% 18.8% 14.5% 14.8% 2019 2020 2021 2022 2023 2024 Gross Profit Gross Profit Gross Margin (4) (5) (5)(5)
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18© 2025 Amkor Technology, Inc. $756 $960 $1,331 $1,529 $1,135 $1,091 1.9x 1.2x 0.9x 0.8x 1.1x 1.1x - 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 $0 $200 $400 $600 $800 $1,000 $1,200 $1,400 $1,600 $1,800 2019 2020 2021 2022 2023 2024 EBITDA and Leverage* EBITDA Debt/EBITDA Free Cash Flow and Leverage ($ in millions) $104 $221 $344 $194 $534 $359 2019 2020 2021 2022 2023 2024 Free Cash Flow* *See discussion of Non-GAAP measures on slide 24 and the reconciliation to the most directly comparable GAAP measure on slides 22-23. (3) See corresponding endnotes on slide 25.
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19© 2025 Amkor Technology, Inc. Balanced and Disciplined Capital Allocation Strategy Invest in Organic Growth ▶ Invest in manufacturing scale and in diversifying global footprint ▶ Invest in R&D to enhance technology in partnership with lead customers Strategic Investments ▶ Support regional semiconductor supply chains ▶ Tuck-in M&A for strategic business growth Maintain Balance Sheet Strength & Flexibility ▶ Debt to EBITDA* at or below 1.5X ▶ Maintain strong liquidity for maximum flexibility Shareholder Returns ▶ Return 40%-50% of Free Cash Flow* over time1 ▶ Growth in regular quarterly dividend2 1 Cumulative free cash flow starting 2022; 2 Subject to Board approval *See discussion of Non-GAAP measures on slide 24 and the reconciliation to the most directly comparable GAAP measure on slides 22-23.
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20© 2025 Amkor Technology, Inc. Corporate Responsibility Commitment Mission Amkor delivers agile and dependable manufacturing and supply chain solutions developed in close collaboration with our customers. Reporting Frameworks ▶ SASB Semiconductor Standard ▶ CDP (Carbon Disclosure Project) Governance ▶ Nominating and Governance Committee ▶ Corporate Compliance & Responsibility Committee Industry Coalition ▶ Responsible Business Alliance ▶ Responsible Minerals Initiative ▶ Semiconductor Climate Consortium Environmental Goals ▶ 20% reduction in water usage and waste generation by 2030 Climate Change – Net Zero Emissions by 2050 ▶ The SBTi has verified Amkor’s net-zero science-based target by 2050 ▶ Near-term target: 55% absolute reduction in Scope 1 and 2 GHG emissions by 2033
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21© 2025 Amkor Technology, Inc. Appendix
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22© 2025 Amkor Technology, Inc. ($ in millions) 2019 2020 2021 2022 2023 2024 Net Income $123 $340 $646 $767 $362 $356 Plus: Interest Expense 72 64 52 59 59 65 Plus: Income Tax Expense 37 46 69 90 82 75 Plus: Depreciation & Amortization 524 510 564 613 632 595 EBITDA* $756 $960 $1,331 $1,529 $1,135 $1,091 Total Debt $1,450 $1,154 $1,138 $1,232 $1,203 $1,159 Debt to Net Income 11.8 3.4 1.8 1.6 3.3 3.3 Debt to EBITDA* 1.9 1.2 0.9 0.8 1.1 1.1 Financial Reconciliation Tables (3), (6) (4) *See discussion of Non-GAAP measures on slide 24.See corresponding endnotes on slide 25. (5)
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23© 2025 Amkor Technology, Inc. ($ in millions) 2019 2020 2021 2022 2023 2024 Net Cash Provided by Operating Activities $564 $770 $1,121 $1,099 $1,270 $1,089 Less: Payments for Property, Plant and Equipment (472) (553) (780) (908) (749) (744) Plus: Proceeds from Sale of, Insurance Recovery ..for and Grants for Property, Plant and Equipment 12 4 3 3 13 14 Free Cash Flow* $104 $221 $344 $194 $534 $359 Financial Reconciliation Tables *See discussion of Non-GAAP measures on slide 24.
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24© 2025 Amkor Technology, Inc. Non-GAAP Measures Generally, a non-GAAP financial measure is a numerical measure of a company’s performance, financial position or cash flows that either excludes or includes amounts that are not normally excluded or included in the most directly comparable measure calculated and presented in accordance with U.S. GAAP. In this presentation we refer to EBITDA and Debt to EBITDA (Leverage), which are not defined by U.S. GAAP. We define EBITDA as net income before interest expense, income tax expense and depreciation and amortization. Debt to EBITDA is calculated by dividing Total Debt by EBITDA for the period. We believe EBITDA and Debt to EBITDA to be relevant and useful information to our investors because they provide additional information in assessing our financial operating results. Our management uses EBITDA and Debt to EBITDA in evaluating our operating performance, and our ability to service debt, fund capital expenditures and pay dividends. However, EBITDA and Debt to EBITDA have certain limitations in that they do 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 and Debt to EBITDA should be considered in addition to, and not as a substitute for, or superior to, operating income, net income, net income margin, debt to 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. Please see Slide 22 for the reconciliation of these non-GAAP measures to the most directly comparable U.S. GAAP measures. Free cash flow is not defined by U.S. GAAP. We define Free Cash Flow as net cash provided by operating activities less payments for property, plant and equipment, plus proceeds from the sale of, insurance recovery for and grants for property, plant and equipment, if applicable. We believe Free Cash Flow to be relevant and useful information to our investors because it provides them with additional information in assessing our liquidity, capital resources and financial operating results. Our management uses Free Cash Flow in evaluating our liquidity, our ability to service debt, and our ability to fund capital expenditures and pay dividends. However, Free Cash Flow has certain limitations, including that it does not represent the residual cash flow available for discretionary expenditures since other, non-discretionary expenditures, such as mandatory debt service, are not deducted from the measure. The amount of mandatory versus discretionary expenditures can vary significantly between periods. This measure should be considered in addition to, and not as a substitute for, or superior to, other measures of liquidity or financial performance prepared in accordance with U.S. GAAP, such as net cash provided by operating activities. Furthermore, our definition of Free Cash Flow may not be comparable to similarly titled measures reported by other companies. Please see Slide 23 for the reconciliation to the most directly comparable U.S. GAAP measure.
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25© 2025 Amkor Technology, Inc. Endnotes 1. Capital intensity is defined as capital expenditures as a percentage of net sales. 2. This financial guidance is from our October 27, 2025 earnings release and is reproduced here for convenience of reference only. This reference is not intended, and should not be relied upon, as a reaffirmation or other commentary with respect to such financial guidance. Please see slide 2. 3. 2019 net income includes an $8 million charge, or $0.03 per share, related to the early redemption of $525 million of senior notes due 2022 and a net $11 million discrete income tax charge, or $0.05 per diluted share, related to changes in the valuation of certain deferred tax assets. 4. 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. 5. We periodically assess the estimated useful lives of our property, plant and equipment. Based on our assessment of test equipment and its increased interchangeability enabling broader and longer use, we extended the estimated useful lives of test equipment from five years to seven years as of January 1, 2024. As a result, depreciation expense was reduced by approximately $59 million for the year ended December 31, 2024. This benefited net income by approximately $49 million and diluted earnings per share by $0.20. In addition, the reduction in depreciation expense benefited our gross margin by approximately 80 basis points for the year ended December 31, 2024. 6. In Q1 2020, we repaid $120 million of our term loan due December 2023 with proceeds from a term loan entered into in December 2019, thus increasing our outstanding debt at Q4 2019 period end.
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26© 2025 Amkor Technology, Inc. amkor.com l ENABLING the FUTURE Thank You