UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM SD

Specialized Disclosure Report

Amkor Technology, Inc.

(Exact name of the registrant as specified in its charter)

Mark N. Rogers  (480) 821-5000

(Name and telephone number, including area code, of the person to contact in connection with this report)

Section 1 - Conflict Minerals Disclosure

Item 1.01 Conflict Minerals Disclosure and Report

Conflict Minerals Disclosure

This Specialized Disclosure Report on Securities and Exchange Commission (“SEC”) Form SD (this “Form SD”) is filed pursuant to Section 13(p) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 13p-1 thereunder, which implements Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (Section 13(p) of the Exchange Act, Rule 13p-1 thereunder, and Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act collectively, the “Conflict Minerals Regulations”). Pursuant to the Conflict Minerals Regulations, Amkor Technology, Inc. (the “Company”) conducted a good faith Reasonable Country of Origin Inquiry in 2021 (the “RCOI”) on the sources of its Conflict Minerals (as defined in the Conflict Minerals Regulations) to determine whether the Conflict Minerals used when performing the Company’s semiconductor packaging services originated from the Democratic Republic of the Congo or an adjoining country (the “Covered Countries”) or are from recycled or scrap sources.

The Company conducted the RCOI with its direct suppliers using the Conflict Minerals Reporting Template (“CMRT”), a supply chain survey tool provided by the Responsible Minerals Initiative (“RMI”), an industry group that works to address Conflict Minerals issues within supply chains. The CMRT requests direct suppliers to identify the smelters, refiners, and countries of origin of the Conflict Minerals in their products. The Company relied primarily on responses received from its direct suppliers and information provided by the RMI to identify sources of the Conflict Minerals used by the Company.

Based on the responses to the Company’s RCOI, the Company knows or has reason to believe that a portion of the Conflict Minerals used by the Company originated or may have originated from the Covered Countries or may not be solely from recycled or scrap sources.

In accordance with the Conflict Minerals Regulations, the Company’s Conflict Minerals Report for the year ended December 31, 2021 (the “CMR”) is attached to this Form SD as Exhibit 1.01 and is incorporated into this Form SD by reference. Both reports are available on our website under the heading “Financial Information > SEC Filings” at https://ir.amkor.com. This Form SD and Exhibit 1.01 contain references to the Company’s website. The information on the Company’s website is not incorporated by reference into this Form SD or the CMR, nor are they deemed “filed” with the SEC pursuant to the Exchange Act or the Securities Act of 1933, as amended.

Item 1.02 Exhibit

Information concerning Conflict Minerals required by the Conflict Minerals Regulations is included in Exhibit 1.01 to this Form SD.

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Section 2 - Resource Extraction Issuer Disclosure

Item 2.01 Resource Extraction Issuer Disclosure and Report

Not applicable.

Section 3 - Exhibits

Item  3.01 Exhibits

Exhibit 1.01 - Conflict Minerals Report for the reporting period January 1, 2021 to December  31, 2021, as required by Items 1.01 and 1.02 of this Form.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the duly authorized undersigned.

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Exhibit 1.01

Conflict Minerals Report of Amkor Technology, Inc.

This Conflict Minerals Report for the year ended December 31, 2021 (this “Report”) of Amkor Technology, Inc. (the “Company,” “Amkor,” “we,” or “us”) 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. These forward-looking statements include risks, uncertainties, assumptions, and other factors, including, among other things, our customers’ requirements to use certain suppliers, our suppliers’ responsiveness and cooperation with our due diligence efforts, our ability to implement improvements in our Conflict Minerals (as defined below) program, changes to the sourcing status of smelters and refiners in our supply chain, and our ability to identify and mitigate related risks in our supply chain, that could affect future results or cause actual results and events to differ materially from historical and expected results and those expressed or implied in the forward-looking statements. 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, 2021 (the “Form 10-K”) and in the Company’s subsequent reports filed with or furnished to the Securities and Exchange Commission (“SEC”) prior to or after the date hereof. You should carefully consider the trends, risks, and uncertainties described in this Report, 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 the trends, risks, or uncertainties described in this Report or elsewhere in our SEC reports actually occurs or continues, our business, financial condition, or operating results could be materially adversely affected, the trading prices of our securities could decline, and you could lose part or all of your investment. All forward-looking statements in this Report are made based on our current expectations, forecasts, estimates, and assumptions. Amkor undertakes no obligation to review or update any forward-looking statements to reflect events or circumstances occurring after the date of this Report except as may be required by law. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by this cautionary statement.

This Report was prepared in accordance with Section 13(p) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Rule 13p-1 thereunder, which implements Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (Section 13(p) of the Exchange Act, Rule 13p-1 thereunder, and Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act collectively, the “Conflict Minerals Regulations”).

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Business Overview

Amkor is one of the world’s leading providers of outsourced semiconductor packaging and test services. Our packaging and test services are designed to meet application and chip specific requirements including: the required type of interconnect technology; size; thickness; and electrical, mechanical, and thermal performance. Some of the materials we use when providing packaging services contain tantalum, tin, tungsten, or gold (collectively, “Conflict Minerals”). Test services involve checking that a packaged die meets its design and performance specifications and do not involve the use of Conflict Minerals.

The supply chain that provides us with Conflict Minerals is divided into upstream and downstream entities. An upstream entity is between the mine of origin and the smelter or refiner and includes miners, local traders, exporters from the country of mineral origin, international concentrate traders, mineral processors, smelters, and refiners. A downstream entity is between the smelter or refiner and the retailer and includes metal traders and exchanges, component manufacturers, product manufacturers, original equipment manufacturers, and retailers.

Amkor is a downstream entity and is typically several tiers removed from the smelter or refiner and mineral origin. We have limited visibility beyond our direct suppliers to entities within the supply chain. Therefore, we rely principally on our direct suppliers to provide us with sourcing information.

Due Diligence Overview

We undertook due diligence on the source and chain of custody of the Conflict Minerals we use when providing packaging services using tools and relying on information provided by the Responsible Minerals Initiative (the “RMI”), an industry group that works to address Conflict Minerals issues within supply chains. One RMI tool we used as part of our due diligence was the Conflict Minerals Reporting Template (“CMRT”), which facilitates the collection of information on the source of Conflict Minerals. We also relied on information from the Responsible Minerals Assurance Process (“RMAP”), a voluntary initiative managed by the RMI, in which an independent third party validates the Conflict Minerals management procedures of a smelter or refiner to determine, with reasonable confidence, that the minerals it processes were sourced responsibly. If a smelter or refiner has committed to undergo an RMAP assessment, completed the relevant documents, and scheduled the RMAP assessment, they are designated by the RMI as “Active.” Upon completion of a successful audit, the smelter or refiner is designated by the RMI as “Conformant.”

Due Diligence Design

We designed our due diligence to conform to an internationally recognized due diligence framework, the Organisation for Economic Co-operation and Development (OECD), Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, Third Edition, and related supplements on Tin, Tantalum and Tungsten and on Gold (collectively, the “OECD Framework”).

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Due Diligence Performed

The OECD Framework provides a five-step outline for risk-based due diligence in the mineral supply chain. Using the OECD Framework, we list below the actions taken to exercise due diligence on the source of Conflict Minerals we used when providing packaging services.

Step 1 - Establish Strong Management Systems

Step 2 - Identify and Assess Risks in the Supply Chain

Step 3 - Design and Implement a Strategy to Respond to Identified Risks

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Step 4 - Carry Out Independent Third-party Audits of Smelter’s/Refiner’s Due Diligence Practices

Step 5 - Report Annually on Supply Chain Due Diligence

Due Diligence Results

The results of our due diligence indicate that the sources of Conflict Minerals are (1) from recycled or scrap materials, (2) from within the Democratic Republic of the Congo or adjoining countries (the “Covered Countries”), or (3) from outside the Covered Countries. We received responses from all our direct suppliers subject to our supply chain survey for 2021. Collectively, their responses identified 235 smelters and refiners within their supply chains as of December 31, 2021. As of December 31, 2021, the RMAP had designated 232 of those smelters and refiners as Conformant and three smelters as Active.

The following tables list the population of smelters, refiners, and origin of Conflict Minerals within our supply chain for 2021. Our efforts to determine this population are described above under the caption “Due Diligence Performed.” The information presented is derived from information provided by our direct suppliers and the RMI.

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Due Diligence Improvements

We plan to undertake the following steps in 2022 to build on our efforts to source Conflict Minerals responsibly:

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