AMKR

EX-99.1

2 amkr6302026erex-991.htm

EX-99.1

Document

Amkor Technology Reports Financial Results for the Second Quarter 2026

TEMPE, Ariz. -- July 27, 2026 -- Amkor Technology, Inc. (Nasdaq: AMKR), a leading provider of semiconductor packaging and test services, today announced financial results for the second quarter ended June 30, 2026.

Record Second Quarter 2026 Highlights

•Net sales $1.90 billion, up 26% year-on-year

•Gross profit $319 million, operating income $200 million

•Net income $174 million, earnings per diluted share $0.70

•EBITDA $400 million

“Amkor delivered record second quarter revenue and strong profitability, with record revenue in our Computing and Automotive & Industrial end markets," said Kevin Engel, president and chief executive officer. "During the first half of 2026, we expanded strategic partnerships across the semiconductor ecosystem, advanced key customer programs in AI and HPC, and continued the expansion of our Advanced packaging and test capacity. We expect these actions will strengthen our competitive position, increase our earnings power, and create sustainable shareholder value.”

Quarterly Financial Results

($ in millions, except per share data)

Q2 2026Q1 2026Q2 2025 (2)

Net sales$1,898$1,685$1,511

Gross margin16.8%14.2%12.0%

Operating income$200$100$92

Operating income margin10.5%6.0%6.1%

Net income attributable to Amkor$174$83$54

Earnings per diluted share$0.70$0.33$0.22

EBITDA (1)$400$285$259

(1) EBITDA is a non-GAAP measure. The reconciliation to the comparable GAAP measure is included below under “Selected Operating Data.”

(2) During the three months ended June 30, 2025, our results include a $32 million net benefit to operating income and EBITDA due to a contingency payment related to our acquisition of Nanium in May 2017. Net income and earnings per diluted share also include a $16 million and $0.07 benefit, respectively.

At June 30, 2026, total cash and short-term investments was $2.5 billion, and total debt was $2.5 billion.

The company paid a quarterly dividend of $0.08352 per share on June 23, 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.

1

Business Outlook

The following information presents Amkor’s guidance for the third quarter 2026 (unless otherwise noted):

•Net sales of $1.95 billion to $2.05 billion

•Gross margin of 18.5% to 19.5%

•Net income of $180 million to $205 million, or $0.72 to $0.82 per diluted share

•Full year 2026 capital expenditures of approximately $2.5 billion to $3.0 billion

Conference Call Information

Amkor will conduct a conference call on Monday, July 27, 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

AMKOR TECHNOLOGY, INC.

Selected Operating Data

Q2 2026Q1 2026Q2 2025

Net Sales Data:

Net sales (in millions):

Advanced products (1)$1,557 $1,372 $1,228

Mainstream products (2)341 313 283

Total net sales$1,898 $1,685 $1,511

Packaging services88 %89 %88 %

Test services12 %11 %12 %

Net sales from top ten customers66 %68 %72 %

End Market Distribution Data:

Communications (smartphones, tablets)42 %44 %40 %

Computing (data center, infrastructure, PC/laptop, storage)22 %21 %22 %

Automotive, industrial and other (ADAS, electrification, infotainment, safety)22 %21 %20 %

Consumer (AR & gaming, connected home, home electronics, wearables)14 %14 %18 %

Total100 %100 %100 %

Gross Margin Data:

Net sales100.0 %100.0 %100.0 %

Cost of sales:

Materials52.6 %53.5 %52.9 %

Labor10.0 %10.7 %11.7 %

Depreciation8.6 %9.3 %9.6 %

Other manufacturing12.0 %12.3 %13.8 %

Gross margin16.8 %14.2 %12.0 %

(1) Advanced products include flip chip, memory and wafer-level processing

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amkr-202602090001047127false00010471272026-02-092026-02-09

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 9, 2026

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02. Results of Operations and Financial Condition.

On February 9, 2026, Amkor Technology, Inc. announced in a press release its financial performance for the fourth quarter and year ended December 31, 2025. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated February 9, 2026, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: February 9, 2026

amkr-202510210001047127false00010471272025-10-212025-10-21

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 21, 2025

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition.

On October 27, 2025, Amkor Technology, Inc. announced in a press release its financial performance for the three and nine months ended September 30, 2025. The information in this Item 2.02 in this Current Report on Form 8-K and Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the "Securities Act"), or the Exchange Act, regardless of any general incorporation language in such filing.

Item 5.02 Departure of Directors or Principal Officers; Election of Directors; Appointment of Principal Officers.

On October 21, 2025, Mr. Giel Rutten, the President and Chief Executive Officer of Amkor Technology, Inc. (the “Company”), provided notice that he would voluntarily retire as President and Chief Executive Officer on December 31, 2025. Mr. Rutten will continue serving as a member of the Board of Directors of the Company (the “Board”). Following its Chief Executive Officer succession planning process, the Board has unanimously appointed Mr. Kevin Engel to succeed Mr. Rutten as President and Chief Executive Officer and as a member of the Board, with each appointment effective immediately after Mr. Rutten’s retirement as President and Chief Executive Officer. Mr. Engel joined the Company in August 2004 and currently serves as Executive Vice President, Chief Operating Officer of the Company, which role will cease when his appointment as President and Chief Executive Officer of the Company becomes effective. To assist in the leadership transition, Mr. Rutten has agreed that, upon the effectiveness of Mr. Engel’s appointment, Mr. Rutten will provide strategic and advisory services to the Company through March 31, 2026.

Mr. Engel will serve as a director of the Board until the Company’s annual meeting of stockholders to be held in 2026 and until his successor has been elected and qualified or until his earlier resignation or removal.

Over his 20 years with the Company, Mr. Engel has held executive leadership roles of increasing responsibility including serving as Executive Vice President, Business Units from 2023 to 2025 and Corporate Vice President, Flip Chip/Wafer Level Business Unit from 2020 to 2023. Mr. Engel has nearly 30 years of experience in the electronics and semiconductor industry, including over 20 years of service with the Company.

In connection with Mr. Engel’s appointment, Mr. Engel and the Company entered into an Employment Letter Agreement (the “Employment Agreement”). Pursuant to the Employment Agreement, Mr. Engel will serve as the President and Chief Executive Officer of the Company and, subject to the approval of the Board and election by the stockholders (if applicable), as a member of the Board, in each case

amkr-202507280001047127false00010471272025-07-282025-07-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 28, 2025

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition.

On July 28, 2025, Amkor Technology, Inc. announced in a press release its financial performance for the three and six months ended June 30, 2025. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated July 28, 2025, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: July 28, 2025

amkr-202504280001047127false00010471272025-04-282025-04-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 28, 2025

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition.

On April 28, 2025, Amkor Technology, Inc. announced in a press release its financial performance for the three months ended March 31, 2025. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated April 28, 2025, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: April 28, 2025

amkr-202502100001047127false00010471272025-02-102025-02-10

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 10, 2025

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 2.02. Results of Operations and Financial Condition.

On February 10, 2025, Amkor Technology, Inc. announced in a press release its financial performance for the fourth quarter and year ended December 31, 2024. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated February 10, 2025, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: February 10, 2025

amkr-202410280001047127false00010471272024-10-282024-10-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 28, 2024

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On October 28, 2024, Amkor Technology, Inc. announced in a press release its financial performance for the three and nine months ended September 30, 2024. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated October 28, 2024, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: October 28, 2024

amkr-202407290001047127false00010471272024-07-292024-07-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 29, 2024

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On July 29, 2024, Amkor Technology, Inc. announced in a press release its financial performance for the three and six months ended June 30, 2024. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated July 29, 2024, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: July 29, 2024

amkr-202404290001047127false00010471272024-04-292024-04-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 29, 2024

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On April 29, 2024, Amkor Technology, Inc. announced in a press release its financial performance for the three months ended March 31, 2024. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated April 29, 2024, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: April 29, 2024

amkr-202402050001047127false00010471272024-02-052024-02-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 5, 2024

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition.

On February 5, 2024, Amkor Technology, Inc. announced in a press release its financial performance for the fourth quarter and year ended December 31, 2023. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated February 5, 2024, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: February 5, 2024

amkr-202310300001047127false00010471272023-10-302023-10-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 30, 2023

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On October 30, 2023, Amkor Technology, Inc. announced in a press release its financial performance for the three and nine months ended September 30, 2023. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated October 30, 2023, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: October 30, 2023

amkr-202307310001047127false00010471272023-07-312023-07-31

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 31, 2023

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On July 31, 2023, Amkor Technology, Inc. announced in a press release its financial performance for the three and six months ended June 30, 2023. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated July 31, 2023, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: July 31, 2023

amkr-202305010001047127false00010471272023-05-012023-05-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 1, 2023

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On May 1, 2023, Amkor Technology, Inc. announced in a press release its financial performance for the three months ended March 31, 2023. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated May 1, 2023, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: May 1, 2023

amkr-202302130001047127false00010471272023-02-132023-02-13

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 13, 2023

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition.

On February 13, 2023, Amkor Technology, Inc. announced in a press release its financial performance for the fourth quarter and year ended December 31, 2022. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated February 13, 2023, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: February 13, 2023

amkr-202210310001047127false00010471272022-10-312022-10-31

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 31, 2022

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On October 31, 2022, Amkor Technology, Inc. announced in a press release its financial performance for the three and nine months ended September 30, 2022. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated October 31, 2022, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: October 31, 2022

amkr-202208010001047127false00010471272022-08-012022-08-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 1, 2022

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On August 1, 2022, Amkor Technology, Inc. announced in a press release its financial performance for the three and six months ended June 30, 2022. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated August 1, 2022, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: August 1, 2022

amkr-202205020001047127false00010471272022-05-022022-05-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 2, 2022

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

On May 2, 2022, Amkor Technology, Inc. announced in a press release its financial performance for the three months ended March 31, 2022. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated May 2, 2022, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: May 2, 2022

amkr-202202140001047127false00010471272022-02-142022-02-14

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 14, 2022

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition.

On February 14, 2022, Amkor Technology, Inc. announced in a press release its financial performance for the fourth quarter and year ended December 31, 2021. The information in this Current Report on Form 8-K, including the exhibit attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liability under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Press Release dated February 14, 2022, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President, Chief Financial Officer and Treasurer

Date: February 14, 2022

amkr-202110250001047127false00010471272021-10-252021-10-25

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 25, 2021

AMKOR TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

Delaware 000-29472 23-1722724

(State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.)

2045 EAST INNOVATION CIRCLE

TEMPE, AZ 85284

(Address of principal executive offices, including zip code)

(480) 821-5000 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock, $0.001 par valueAMKRThe NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  o

Item 2.02. Results of Operations and Financial Condition

Attached hereto as Exhibit 99.1 and incorporated by reference herein is financial information for Amkor Technology, Inc. for the three and nine months ended September 30, 2021 and forward-looking statements relating to the fourth quarter and full year 2021 as presented in a press release dated October 25, 2021. The information in this Form 8-K and the exhibit attached hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

ExhibitDescription 99.1 Text of Press Release dated October 25, 2021, which is furnished (not filed) herewith.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

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 undersigned hereunto duly authorized.

AMKOR TECHNOLOGY, INC.

By:/s/ Megan Faust Megan Faust Executive Vice President and Chief Financial Officer

Date: October 25, 2021