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. has filed a prospectus supplement for the resale of 10,000,000 shares of its common stock by a selling stockholder, 915 Investments, LP. This is a secondary offering, and Amkor will not receive any proceeds from the sale.
The shares are priced at $48.75 per share, implying a public offering size of $487,500,000, with underwriting discounts and commissions of $0.26 per share. The selling stockholder expects proceeds of about $484.9 million before expenses, and has granted Goldman Sachs & Co. LLC a 30‑day option to sell up to 1,500,000 additional shares. Amkor had 247,309,063 shares outstanding as of February 10, 2026.
Amkor Technology, Inc. is offering 10,000,000 shares of common stock for resale by the selling stockholder 915 Investments, LP under a Rule 424(b)(7) prospectus supplement. Amkor will not receive any proceeds from this secondary sale.
The underwriter, Goldman Sachs & Co. LLC, has a 30‑day option to buy up to an additional 1,500,000 shares from the selling stockholder. The transaction reduces, but does not eliminate, the Kim family’s controlling stake; their group is expected to hold about 49.5% of voting shares after the offering, or 48.9% if the option is fully exercised.
The filing also provides preliminary unaudited 2025 results. Net sales were $6.71 billion compared with $6.32 billion in 2024, and net income attributable to Amkor was $373.9 million versus $354.0 million. Total assets were $8.14 billion and long‑term debt $1.28 billion as of December 31, 2025, with cash and cash equivalents of $1.38 billion.
Amkor Technology reported stronger results for the fourth quarter and full year 2025. Fourth quarter net sales were $1.89 billion, up 16% year-on-year, with net income of $172 million, or $0.69 per diluted share. For 2025, net sales reached $6.71 billion, up 6%, and net income was $374 million, or $1.50 per diluted share, with EBITDA of $1.16 billion and free cash flow of $308 million. Operating cash flow was $1.10 billion, and year-end cash and short‑term investments totaled $1.99 billion against total debt of $1.45 billion. The board increased the quarterly dividend from $0.08269 to $0.08352 per share, effective with the December 23, 2025 payment. For first quarter 2026, Amkor guides net sales of $1.60–$1.70 billion, gross margin of 12.5%–13.5%, and net income of $45–$70 million, or $0.18–$0.28 per diluted share, and plans full‑year 2026 capital expenditures of about $2.5–$3.0 billion.
Amkor Technology, Inc.’s Chief Accounting Officer, Cherie Buntyn, filed an initial ownership report on Form 3. The filing states that no Amkor Technology securities, either non-derivative or derivative, are beneficially owned. This serves as a baseline disclosure of insider holdings for regulatory reporting purposes.
Amkor Technology, Inc. has appointed Cherie Buntyn as Senior Vice President and Chief Accounting Officer, effective February 2, 2026. In this role, she will serve as the company’s principal accounting officer.
Ms. Buntyn, age 50, brings extensive accounting leadership experience from SurveyMonkey, FLIR Systems, Intel Corporation, and Deloitte & Touche LLP. Her starting annual base salary will be $300,000, and she will be eligible for a cash bonus under Amkor’s annual incentive plan with a target of 35% of base salary. The company states there are no related-party or conflict-of-interest relationships or transactions requiring disclosure under the cited Regulation S-K items.
Amkor Technology director Guillaume Marie Jean Rutten reported a planned stock sale. On January 15, 2026, the reporting person sold 10,000 shares of Amkor Technology, Inc. common stock at a weighted average price of $53.14 per share in an open-market transaction coded as a sale. The transaction was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on June 06, 2025. Following this sale, the reporting person directly owned 335,391 shares of Amkor Technology common stock.
Amkor Technology, Inc. executive Mark N. Rogers reported a routine equity transaction involving stock options and common shares. On January 16, 2026, the EVP & General Counsel exercised 5,000 employee stock options at an exercise price of $7.4 per share, receiving 5,000 shares of common stock. On the same date, he sold 5,000 shares of common stock at a price of $49.28 per share pursuant to a Rule 10b5-1 trading plan adopted on August 1, 2025. Following these transactions, he beneficially owned 23,862 shares of common stock directly and 105,000 employee stock options.
Amkor Technology insider plans another stock sale under Rule 144. A Form 144 notice details an intent to sell 5,000 shares of Amkor common stock through Morgan Stanley Smith Barney LLC on or about 01/16/2026, with the shares listed on NASDAQ. The filing notes that 247,193,437 common shares are outstanding.
The 5,000 shares to be sold were acquired the same day, 01/16/2026, via a stock option exercise from the issuer for cash. The notice also reports that Mark N. Rogers sold 20,000 Amkor common shares on 12/16/2025 for gross proceeds of $859,094 and another 20,000 shares on 11/17/2025 for gross proceeds of $633,786.
A holder of AMKR common stock has filed a notice of proposed resale under Rule 144, indicating an intent to sell 10,000 shares through Morgan Stanley Smith Barney LLC on or about 01/15/2026 on the NASDAQ. The filing lists an aggregate market value of about 531,394.00 for these shares, compared with 247,193,437 common shares outstanding.
The shares proposed for sale were acquired as restricted stock from the issuer on 02/24/2024 and 02/16/2024, in amounts of 6,272 and 3,728 shares. The person for whose account the securities are to be sold also reported prior sales of 10,000 shares on 12/15/2025 for gross proceeds of 448,039.00 and 10,000 shares on 11/17/2025 for gross proceeds of 316,791.00.
Amkor Technology director Winston J. Churchill reported exercising stock options and selling shares of the company. On 12/15/2025, he exercised options to buy 5,000 shares of common stock at an exercise price of $19.39 per share, then sold 5,000 shares of common stock at a price of $44.29 per share on the same date. After these transactions, he directly owned 25,888 shares of Amkor common stock. He also continued to hold 15,000 director stock options with a $19.39 exercise price, expiring on 05/18/2031. The option was originally granted on 05/18/2021 for 20,000 shares and fully vested on 05/17/2022.