Welcome to our dedicated page for Amkor Tech 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.
The Amkor Technology, Inc. (Nasdaq: AMKR) SEC filings page on Stock Titan provides direct access to the company’s regulatory disclosures as filed with the U.S. Securities and Exchange Commission. Amkor is a U.S.-headquartered outsourced semiconductor assembly and test (OSAT) provider and a global leader in semiconductor packaging and test services. Its filings offer detailed insight into financial performance, capital structure, governance, and major corporate actions.
Investors can review annual reports on Form 10-K and quarterly reports on Form 10-Q (when available) to understand Amkor’s net sales by advanced and mainstream product categories, packaging and test services mix, end-market distribution across communications, computing, automotive, industrial and consumer segments, and key metrics such as gross margin and operating income. These reports also describe risk factors, business operations, and the company’s position in the semiconductor packaging and test industry.
Current reports on Form 8-K document material events, including earnings releases, CEO succession plans, executive appointments, board changes, amendments to credit facilities, and new debt offerings. For example, Amkor has filed 8-Ks describing its 5.875% Senior Notes due 2033, the related indenture terms, and the planned redemption of its 6.625% Senior Notes due 2027, as well as the creation of Term A-1 Loans under its credit agreement.
This page also surfaces information on debt covenants and events of default from indenture-related filings, giving readers visibility into limitations on additional indebtedness, liens, sale-leaseback transactions, and certain corporate restructurings. Where applicable, insider transaction reports on Form 4 and proxy statements on Schedule 14A can be used to analyze executive compensation, ownership, and governance practices.
Stock Titan enhances these filings with AI-powered summaries that highlight key points from lengthy documents, helping readers quickly interpret complex 10-K, 10-Q, and 8-K disclosures. Real-time updates from EDGAR ensure that new filings, including material debt, equity, or governance changes, appear promptly, while AI-generated overviews help users focus on the sections most relevant to Amkor’s semiconductor packaging and test business.
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.
Amkor Technology, Inc. (AMKR) reported an insider ownership change involving trusts associated with Agnes C. Kim. On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Agnes C. Kim distributed 705,000 shares of Amkor common stock to the Agnes C. Kim Revocable Trust, a separate trust for which she is sole settlor, beneficiary, and trustee. The transaction was reported with code G, indicating a gift or similar transfer, at a stated price of $0 per share, so no cash changed hands. After this internal trust transfer, the reporting person shows 895,000 shares of Amkor common stock beneficially owned directly. The filing also notes that the reporting person disclaims beneficial ownership of the securities except to the extent of any pecuniary interest.
Amkor Technology, Inc. insider reports a large share distribution. A reporting person affiliated with AMKR disclosed a transfer of 965,000 shares of Amkor Technology common stock on 11/20/2025. The transaction was coded "G," indicating a bona fide gift or similar transfer, at a reported price of $0 per share. After this distribution, the reporting person directly beneficially owns 1,235,000 shares.
The shares were distributed to the James J. Kim 2018-1 Qualified Annuity Trust under an agreement dated 8/30/18, for which James J. Kim and Susan Y. Kim serve as co‑trustees. The reporting person states that beneficial ownership of the securities is disclaimed except to the extent of any pecuniary interest.
Amkor Technology, Inc. insider transaction: the company’s President and CEO, Guillaume Marie Jean Rutten, reported selling 10,000 shares of Amkor common stock on 11/17/2025 at a weighted average price of $31.68 per share. The sale was coded as an open market sale and was made under a pre-arranged Rule 10b5-1 trading plan adopted on June 06, 2025, which is designed to allow insiders to sell shares according to a preset schedule. Following this transaction, Rutten beneficially owned 346,699 shares of Amkor common stock directly.