Welcome to our dedicated page for AMKOR TECHNOLOGY SEC filings (Ticker: AMKR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Amkor Technology Inc. filings document the regulatory record for a Nasdaq-listed outsourced semiconductor packaging and test company. The company’s 8-K reports furnish results of operations and financial condition, disclose material agreements and other events, and describe capital-structure matters involving common stock, senior notes and convertible senior notes.
AMKR filings also cover governance and ownership subjects through definitive proxy materials, officer appointments and underwriting agreements related to registered secondary offerings. Recent debt disclosures describe 0.00% convertible senior notes due 2031, subsidiary guarantees and their relationship to other senior unsecured indebtedness, while earnings-related filings include non-GAAP measures such as EBITDA alongside GAAP results.
Amkor Technology, Inc. reports that its President and CEO, who is also a Director, executed a planned stock sale. On 12/15/2025, the reporting person sold 10,000 shares of Amkor common stock at a weighted average price of $44.80 per share, as disclosed in Table I. This transaction was carried out under a Rule 10b5-1 trading plan adopted on June 6, 2025, meaning the sale followed a pre-established schedule rather than being made at the insider’s discretion at the time of sale.
After this transaction, the reporting person beneficially owns 336,699 shares of Amkor common stock in direct form. The filing notes that the actual sales occurred in multiple trades at prices ranging from $44.37 to $45.18 per share, and the insider has undertaken to provide detailed breakdowns of the share amounts at each price upon request.
Amkor Technology executive Mark N. Rogers, EVP & General Counsel, reported an option exercise and share sale. On 12/16/2025 he exercised employee stock options for 20,000 shares of common stock at an exercise price of $7.40 per share, increasing his directly held shares before the sale.
That same day, he sold 20,000 shares of Amkor common stock at a weighted average price of $42.95 per share, in multiple trades between $42.15 and $43.65, under a Rule 10b5-1 trading plan adopted on August 1, 2025. After these transactions, he directly owned 23,862 shares of common stock and 110,000 stock options, part of an original 200,000-share option grant from June 10, 2019 that vested over four years.
Amkor Technology director MaryFrances McCourt exercised a stock option to acquire 20,000 shares of Common Stock at $19.39 per share and, on December 12, 2025, sold 20,000 shares at a weighted-average price of $46.02, with trades between $45.98 and $46.09. She continues to hold 55,918 shares directly.
Amkor Technology Executive Vice President Kevin Engel reported selling 11,000 shares of common stock on 12/12/2025 at a weighted average price of $46.21 per share, with individual trades executed between $45.92 and $46.52. After these sales, he directly beneficially owns 349 shares of Amkor common stock.
A footnote explains that a filing on February 21, 2025 overreported the number of shares withheld to cover tax obligations by 28 shares, which had caused his reported holdings to be understated by that amount. The current ownership figure reflects this 28-share correction.
Amkor Technology director Gil C. Tily reported selling 20,000 shares of common stock on December 12, 2025 at a weighted average price of $46.44 per share. After this transaction, he directly beneficially owns 123,806 Amkor shares. The sale was executed through multiple trades at prices ranging from $45.91 to $46.83, and the reporting person has committed to provide details of the individual trade prices upon request.
Amkor Technology, Inc. disclosed that, on December 4, 2025, a grantor retained annuity trust named for the reporting person distributed 758,000 shares of Amkor common stock to that person as a gift at $0. Because the reporting person was already the annuitant and sole trustee of the trust, this was described as a mere change in the form of ownership from indirect to direct.
After the transaction, the reporting person directly held 6,090,494 shares of Amkor common stock and continued to hold additional shares indirectly through various trusts and entities, including Sujochil, LP and Sujoda Investments, LP. The reporting person states that beneficial ownership of these securities is disclaimed except to the extent of her pecuniary interest.
Amkor Technology (AMKR) director and 10% owner Susan Y. Kim reported several internal trust-related movements of Amkor common stock on November 20, 2025, all at a reported price of $0 per share. A 2024 Grantor Retained Annuity Trust (GRAT) for Susan Y. Kim distributed 876,000 shares to her directly, changing her holdings from indirect to direct ownership. Separate 2024 GRATs for James J. Kim and Agnes C. Kim distributed 965,000 and 705,000 shares, respectively, to other family trusts where she serves as trustee or co-trustee.
After these transactions, Susan Y. Kim reports substantial indirect beneficial ownership through multiple vehicles, including 3,453,610 shares held by family trusts (excluding GRATs), 3,800,000 shares held by certain GRATs, 19,484,809 shares held by Sujochil, LP, 16,710,668 shares held by Kim Capital Partners - KCP, LLC, and 3,789,479 shares held by Sujoda Investments, LP. She disclaims beneficial ownership beyond her pecuniary interest in these holdings.
Amkor Technology, Inc. insider James J. Kim reported a trust-to-trust transfer involving 965,000 shares of Amkor common stock. The Form 4 shows that on 11/21/2025, 965,000 shares were moved as a gift or similar transfer from the 2024 Grantor Retained Annuity Trust of James J. Kim 8/5/2024 to the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18, where he and Susan Y. Kim serve as co‑trustees.
After the transaction, 965,000 shares are reported as indirectly owned through trusts, with additional indirect holdings including shares held by his spouse and several family trusts. One disclosure notes that trusts for his immediate family members own 9,786,032 shares of Amkor common stock, and a related limited liability company holds 164,678 shares. Kim formally disclaims beneficial ownership beyond his pecuniary interest in these positions.
Amkor Technology, Inc. (AMKR) reported an insider ownership change involving 876,000 shares of common stock. On November 20, 2025, a reporting person that is a member of a 10% owner group distributed 876,000 shares of Amkor common stock to Susan Y. Kim. She is the annuitant and sole trustee of the reporting person, so this movement is described as a mere change in the form of ownership from indirect to direct. The transaction was coded as "G" with a price of $0, and following the distribution, 1,124,000 shares were reported as beneficially owned on a direct basis.
Amkor Technology, Inc. (AMKR) insider Agnes C. Kim reported an internal trust transfer of company shares. On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024 distributed 705,000 shares of common stock of Amkor Technology, Inc. to the Agnes C. Kim Revocable Trust, where she is the settlor, sole trustee, and sole beneficiary. The transaction was reported at a price of $0 per share and coded as a change in form of ownership.
Following this distribution, 705,000 shares are shown as indirectly held through trusts. The form also notes 12,290,281 shares of common stock indirectly owned by the reporting person’s spouse, James J. Kim. Agnes C. Kim formally disclaims beneficial ownership of the spouse-held shares except to the extent of any pecuniary interest.