Results of Operations and Financial Condition. On July 27, 2026, Amkor Technology, Inc. announced in a press release its financial performance for the three and six months ended June 30, 2026. 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 shal…

The Notes were issued to the initial purchasers in reliance upon Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), in transactions not involving any public offering. The Notes were resold by the initial purchasers to persons whom the initial purchasers reasonably believe are “qualified institutional buyers,” as defined in, and in accordance with, Rule 144A under the Securities Act. Any shares of the Company’s common stock that may be issued upon conversion of t…

Creation of a Direct Financial Obligation or an Obligation Under an Off-Balance Sheet Arrangement of a Registrant. The disclosure set forth in

Entry Into a Material Definitive Agreement. Indenture and Notes On May 5, 2026, Amkor Technology, Inc. (the “Company”) issued $1,150,000,000 aggregate principal amount of its 0.00% Convertible Senior Notes due 2031 (the “Notes”). The Notes were issued pursuant to, and are governed by, an indenture (the “Indenture”), dated as of May 5, 2026, among the Company, the Guarantors (as defined below) named therein and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”). Pursuant…

Other Events. On April 30, 2026, Amkor Technology, Inc. (the “Company”) issued a press release announcing the pricing of its offering of $1,000,000,000 aggregate principal amount of its 0.00% Convertible Senior Notes due 2031 (the “Notes”). The Company also announced its intention to use the net proceeds of the offering to enter into certain capped call transactions and for general corporate purposes, including capital expenditures. A copy of this press release is attached as Exhibit 99.1 to…

Results of Operations and Financial Condition. On April 27, 2026, Amkor Technology, Inc. announced in a press release its financial performance for the three months ended March 31, 2026. 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 b…

Other Events. On February 12, 2026, Amkor Technology, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Goldman Sachs & Co. LLC, as the underwriter (the “Underwriter”), and 915 Investments, LP, a stockholder of the Company (the “Selling Stockholder”), relating to the offer and sale by the Selling Stockholder of 10,000,000 shares of the Company’s common stock, par value $0.001 per share (“Common Stock”), pursuant to the Company’s automatic shelf re…

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…

Senior Vice President and Chief Accounting Officer — Cherie Buntyn: Cherie Buntyn was appointed as the Senior Vice President and Chief Accounting Officer.

Director — John Liu: The director resigned to join the company as an Executive Vice President, representing an internal transition rather than a loss of external leadership.

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.

CEO — Giel Rutten: The CEO is voluntarily retiring with a pre-announced internal successor (COO) and an advisory transition period, indicating an orderly succession rather than a sudden loss of leadership.

Entry into a Material Definitive Agreement. On September 22, 2025, Amkor Technology, Inc., a Delaware corporation (the “Company”) issued $500,000,000 aggregate principal amount of its 5.875% Senior Notes due 2033 (the “2033 Notes”), pursuant to an Indenture (the “Indenture”) between the Company and U.S. Bank Trust Company, National Association, as trustee, relating to the issuance of the 2033 Notes. U.S. Bank Trust Company, National Association, the trustee under the Indenture, also serves as…

On September 22, 2025, the Company entered into the Indenture relating to the issuance by the Company of $500,000,000 aggregate principal amount of the 2033 Notes. The material terms and conditions of the Indenture and the 2033 Notes are as follows: Maturity . The 2033 Notes mature on October 1, 2033, subject to earlier redemption or repurchase. Interest . The 2033 Notes accrue interest at a rate of 5.875% per year. Interest on the 2033 Notes is paid semi-annually in arrears on April 1 and Oc…

Other Events. On September 8, 2025, Amkor Technology, Inc. (the “Company”) issued a press release announcing the pricing of its offering of $500,000,000 aggregate principal amount of its 5.875% Senior Notes due 2033 (the “2033 Notes”). The Company also announced its intention to use the proceeds of the offering to redeem in full the $400,000,000 aggregate principal amount outstanding of its 6.625% senior notes due 2027 (the “2027 Notes”), to pay related fees and expenses, and for general corp…

Other Events. On September 8, 2025, Amkor Technology, Inc. (the “Company”) issued a press release announcing its intention to offer $400,000,000 aggregate principal amount of senior notes due 2033 (the “2033 Notes”). The Company also announced its intention to use the proceeds of the offering to redeem in full the $400,000,000 aggregate principal amount outstanding of its 6.625% senior notes due 2027 (the “2027 Notes”). The consummation of the offering of the 2033 Notes will not be conditione…

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 shal…

Other Events. On June 27, 2025, the Company notified U.S. Bank Trust Company, National Association, as trustee, that it will redeem $125 million aggregate principal amount 6.625% Senior Notes due 2027 (the “Notes”) at the redemption price, calculated in accordance with the indenture governing the Notes, plus accrued and unpaid interest. The redemption date for the Notes will be July 30, 2025. Following such redemption, $400 million aggregate principal amount of the Notes shall remain outstand…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. On June 27, 2025, Amkor Technology, Inc. (the “Company”) entered into the First Amendment to Credit Agreement (the “Amendment”), which amends the existing senior revolving credit facility, dated as of May 9, 2025 (the “Existing Credit Agreement” and, as amended by the Amendment, the “Credit Agreement”), by and among the Company, as borrower, the Lenders party thereto from time to…

Entry into a Material Definitive Agreement. The information provided in

Entry into a Material Definitive Agreement. The information provided in

Termination of a Material Definitive Agreement. The information provided in

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. On May 9, 2025, Amkor Technology, Inc. (the “Company”) replaced its existing senior revolving credit facility, dated as of March 28, 2022, with a new revolving credit facility (the “New Revolver”) pursuant to a Credit Agreement (the “Credit Agreement”), dated as of May 9, 2025, by and among the Company, as borrower, the Lenders party thereto from time to time, the L/C Issuers par…

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 b…

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 sectio…