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.
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.
Mark N. Rogers submitted a Form 144 reporting an intended sale of 5,000 shares of Common Stock of AMKR on 04/16/2026 via a stock option exercise with cash proceeds. The filing also lists prior sales of 5,000 shares on 03/16/2026 for $222,700 and 5,000 shares on 02/17/2026 for $234,600.
Amkor Technology director and 10% owner Susan Y. Kim exercised options to acquire 20,000 shares of Common Stock. She exercised a director stock option for 20,000 shares at an exercise price of $5.66 per share, a grant originally issued on May 4, 2016 that vested on May 2, 2017.
Following the exercise, she directly holds 6,110,494 shares of Amkor Common Stock. The filing also lists substantial additional indirect holdings through various grantor retained annuity trusts, other family trusts, and limited partnerships including Sujochil, LP and Sujoda Investments, LP, in which she is a trustee, general partner, or LLC member.
The report notes that she is treated as having a pecuniary interest in these indirect holdings for reporting purposes but expressly disclaims beneficial ownership beyond her actual economic interest.
AMKOR TECHNOLOGY, INC. director Robert Randolph Morse exercised stock options and settled related taxes using shares. He exercised a Director Stock Option covering 20,000 shares of Common Stock at an exercise price of $5.66 per share in a net exercise with the issuer.
To cover the exercise price or tax liability, 2,378 shares of Common Stock were disposed of in a tax-withholding transaction. Following these events, Morse holds 134,977 shares of Amkor Common Stock directly. No shares were bought or sold in the open market, and the option, granted in 2016 and fully vested in 2017, is now fully exercised.
Amkor Technology Inc: Dimensional Fund Advisors filed an amendment to report beneficial ownership of 10,991,469 shares of Common Stock, representing 4.4% of the class. The filing shows sole voting power of 10,740,514 and sole dispositive power of 10,991,469. The filing states these shares are owned by various Funds advised or sub‑advised by Dimensional, and Dimensional expressly disclaims beneficial ownership of the securities.
WATSON DAVID N reported acquisition or exercise transactions in this Form 4 filing.
AMKOR TECHNOLOGY, INC. director David N. Watson received a small grant of additional restricted stock units as part of his existing equity compensation. The award covers 18.1563 dividend equivalent units, each representing one extra time-vested RSU tied to a cash dividend paid on March 31, 2026.
After this grant, Watson directly holds a total of 9,893.0573 restricted stock units. This is a routine, non-cash compensation adjustment rather than an open-market stock purchase or sale.
AMKOR TECHNOLOGY, INC. director Tily Gil C. reported an acquisition of additional equity-based compensation. On March 31, 2026, the director received 18.1563 dividend equivalent units, each representing an additional restricted stock unit tied to a prior May 15, 2025 RSU grant. Following this award, the director directly holds 9,893.0573 restricted stock units linked to Amkor common stock.
AMKOR TECHNOLOGY, INC. director Guillaume Marie Jean Rutten reported equity compensation activity, including a new grant of 482 restricted stock units and the vesting of 8,692 restricted stock units into common shares. These transactions are awards and exercises, not open-market buying or selling.
Following the conversion of 8,692 restricted stock units into common stock, Rutten directly holds 552,558 shares of Amkor common stock. The restricted stock units were granted under Amkor’s 2021 Equity Incentive Plan as compensation for board service and will vest based on specified dates and service conditions.
AMKOR TECHNOLOGY, INC. director Robert Randolph Morse reported routine equity compensation adjustments tied to dividends. On March 31, 2026, he acquired 15.7246 dividend equivalent units and 18.1563 dividend equivalent units, each representing additional restricted stock units linked to prior time-vested RSU grants.
These dividend equivalent units convert into the same number of common shares when the underlying RSUs vest, under the same terms as the original awards. After these grants, Morse directly holds 9,893.0573 restricted stock units in total, reflecting ongoing stock-based compensation rather than any market purchase or sale.
Amkor Technology director MaryFrances McCourt received additional restricted stock units through dividend equivalents. On March 31, 2026, she was granted 15.7246 RSUs and 18.1563 RSUs as dividend equivalent units tied to prior RSU awards from May 16, 2023 and May 15, 2025.
Each dividend equivalent unit converts into one additional RSU under the same terms as the original grants. Following these accruals, she directly holds 9,893.0573 restricted stock units linked to Amkor common stock.
AMKOR TECHNOLOGY, INC. director and 10% owner group member Susan Y. Kim reported an acquisition of restricted stock units tied to a dividend. She received 18.1563 dividend equivalent restricted stock units on March 31, 2026, increasing her restricted stock unit holdings to 9,893.0573 units of common stock.
The filing also lists substantial common stock holdings reported as direct and indirect interests through various family trusts, grantor retained annuity trusts, and limited partnerships, with beneficial ownership treated based on her pecuniary interest in those entities.