Here are the Form 4 insider transactions from Amkor Technology Inc (AMKR) in our archive over the last 12 months, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AMKR and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AMKR filings page.
Amkor Technology director Tily Gil C. reported equity compensation activity involving restricted stock units. On May 13, 2026, 9,893.0573 RSUs vested and were converted into 9,893 shares of common stock, increasing her direct holdings to 118,699 shares. A small 0.0573 RSU portion accrued as dividend equivalent units was settled in cash.
On the same date, she received a new award of 2,613 RSUs under Amkor’s 2021 Equity Incentive Plan, which may convert into the same number of common shares upon future vesting. Following these transactions, she directly holds 118,699 common shares and 2,613 unvested RSUs.
Amkor Technology director David N. Watson reported routine equity compensation activity. On May 13, 2026, previously granted restricted stock units from a May 15, 2025 award vested, and 9,893.0573 RSUs (including associated dividend equivalent units) converted into an equal number of shares of common stock. A small portion, 0.0573 of the dividend equivalent units, was settled in cash rather than shares. On the same date, Watson received a new grant of 2,613 restricted stock units under Amkor’s 2021 Equity Incentive Plan, which can convert into common stock on a one-for-one basis and will vest in full on the earlier of the first anniversary of the grant date or the next annual stockholders’ meeting. Following these transactions, Watson directly holds 130,650 shares of common stock and 2,613 RSUs.
Amkor Technology director Gil C. Tily sold 15,000 shares of Common Stock in an open-market transaction. The shares were sold at a price of $77.30 per share. After this sale, Tily directly holds 108,806 Amkor shares.
Amkor Technology director Guillaume Marie Jean Rutten reported an open‑market sale of 50,000 shares of Common Stock on May 8, 2026. The weighted average sale price was $74.28 per share, with individual trades executed between $73.37 and $74.98. After these transactions, Rutten directly holds 502,558 Amkor shares, indicating he retains a substantial ownership stake in the company.
Amkor Technology director Carolin Roger Anthony reported an exercise-and-sell transaction in company stock. On May 5, 2026, he exercised options to acquire 20,000 shares of common stock at $11.71 per share, then sold 20,000 shares in open-market trades at a weighted average price of $76.24, with individual sale prices ranging from $76.11 to $76.48. After these transactions, he directly owned 94,409 shares of Amkor common stock.
Amkor Technology director Winston J. Churchill reported an open-market sale of 7,000 shares of the company’s Common Stock. The shares were sold at an average price of $76.45 per share. After this transaction, he directly holds 18,888 shares of Amkor Technology.
AMKOR TECHNOLOGY, INC. director Douglas A. Alexander reported an option exercise-and-sale on Common Stock. On May 5, 2026, he exercised options for 5,000 shares at strike prices of $8.51 and $9.45, then sold 5,000 shares in open-market transactions at $76.58 per share. Following these transactions, he directly owned 29,109 common shares.
AMKOR TECHNOLOGY, INC. executive Mark N. Rogers, EVP & General Counsel, exercised options to acquire 5,000 shares of common stock at $7.40 per share and, on the same day, sold 5,000 shares in an open-market transaction at $59.43 per share. Following these transactions, he directly holds 38,904 common shares and 90,000 employee stock options. The filing notes the sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on August 1, 2025, indicating the sale timing was planned in advance.
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.
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.
AMKOR TECHNOLOGY, INC. director Daniel JL Liao reported an automatic acquisition of 18.1563 restricted stock units on dividend equivalent terms. These dividend equivalent units were accrued on March 31, 2026 in connection with previously granted time-vested RSUs from May 15, 2025.
Each dividend equivalent unit represents an additional RSU that is subject to the same vesting and other provisions as the original RSU grant. Following this accrual, Liao’s direct holdings in RSUs tied to common stock total 9,893.0573 units, reflecting a small, compensation-related adjustment rather than an open-market trade.
Amkor Technology CFO Megan Faust exercised restricted stock units into common stock as part of her equity compensation. On March 31, 2026, 8,692 RSUs converted into 8,692 shares of common stock at a stated price of $0.00 per share. Of these, 3,725 shares, valued at $45.03 per share, were withheld by Amkor to cover her tax obligations, with the company paying the taxes on her behalf. After these transactions, she directly owned 134,138 shares of Amkor common stock. The vested RSUs relate to a 43,459-unit grant awarded on February 20, 2025, scheduled to vest in five equal quarterly installments from June 30, 2025 through June 30, 2026.
Amkor Technology, Inc. President and CEO Kevin K. Engel exercised restricted stock units and had shares withheld for taxes. On March 31, 2026, 8,692 restricted stock units converted into 8,692 shares of common stock. Of these, 3,725 shares were withheld by Amkor at $45.03 per share to cover Engel's tax obligations, with taxes paid by the company. After these compensation-related transactions, Engel directly held 7,920 shares of Amkor common stock. The RSUs were part of a 43,459-unit grant made on February 20, 2025 under Amkor's 2021 Equity Incentive Plan, vesting in five equal quarterly installments through June 30, 2026.
Amkor Technology director Winston J. Churchill received additional stock-based compensation through dividend equivalents. On the payment of a dividend on March 31, 2026, he was credited with 18.1563 restricted stock units (RSUs) as dividend equivalent units tied to an existing time-vested RSU award granted on May 15, 2025. Each dividend equivalent unit converts into one additional RSU under the same vesting terms as the original grant. Following this accrual, Churchill holds a total of 9,893.0573 RSUs directly, reflecting routine, non-cash compensation rather than an open-market share purchase.
Amkor Technology director Roger Anthony Carolin reported routine equity compensation adjustments tied to dividends. On March 31, 2026, he acquired 15.7246 restricted stock units as dividend equivalent units on time-vested RSUs granted on May 16, 2023, and 18.1563 units on RSUs granted on May 15, 2025. After these grants, his directly held RSU-based interest increased to 9,893.0573 units, all representing future rights to Amkor common stock, subject to the same vesting terms as the original RSU awards.
Amkor Technology director Douglas A. Alexander received additional restricted stock units through dividend credits rather than market purchases. On March 31, 2026, he was granted three small blocks of dividend equivalent units tied to earlier RSU awards from 2022, 2023, and 2025. Each dividend equivalent unit converts into an additional RSU subject to the same vesting and other conditions as the original grants, modestly increasing his equity-based compensation while leaving cash holdings unchanged.
AMKOR TECHNOLOGY, INC. executive vice president and general counsel Mark N. Rogers exercised stock options and sold shares in a planned transaction. He exercised options for 5,000 shares of common stock at $7.40 per share and on the same day sold 5,000 shares at $44.54 per share in an open-market trade. The filing states the sale was made under a pre-arranged Rule 10b5-1 trading plan adopted on August 1, 2025. Following these transactions, Rogers directly holds 38,904 shares of common stock.
Buntyn Cherie reported acquisition or exercise transactions in this Form 4 filing.
Amkor Technology reported that Chief Accounting Officer Cherie Buntyn received a grant of 799 restricted stock units of Amkor common stock. These RSUs were awarded for no cash consideration as part of her compensation for serving as an officer.
The 799 RSUs will vest in three equal annual installments, beginning on the first anniversary of the March 12, 2026 grant date, with all units fully vested on the third anniversary. Following this grant, Buntyn holds 799 RSUs directly.
Amkor Technology President and CEO Kevin K. Engel reported a mix of equity award activity and share sales. On February 24, 2026, he exercised 910 restricted stock units into 910 shares of common stock at $0.00 per share. To cover tax obligations from this vesting, 372 shares were withheld by Amkor at a reported price of $48.53 per share, with the company paying the related taxes on his behalf. Engel also executed an open-market sale of 12,500 shares of common stock at a reported price of $48.75 per share, with actual trades occurring between $48.73 and $48.81. After these transactions, he directly owned 2,953 shares of Amkor common stock.
AMKOR TECHNOLOGY, INC. director Guillaume Marie Jean Rutten exercised 10,748 restricted stock units on February 24, 2026, receiving 10,748 shares of common stock at no cash cost as part of prior equity awards.
On the same date, he sold 20,000 common shares in open-market transactions at a weighted average price of $48.80 per share, with individual prices ranging from $48.80 to $48.86. After these transactions, he directly owned 543,866 shares of Amkor common stock.
Amkor Technology CFO Megan Faust reported routine equity compensation activity involving restricted stock units. On February 24, 2026, 3,493 RSUs were exercised and converted into 3,493 shares of common stock at $0.00 per share, reflecting vesting of prior grants.
To cover tax withholding obligations from this vesting, 1,497 common shares were automatically disposed of at $48.53 per share, with Amkor paying the related taxes on her behalf. After these transactions, Faust directly owned 129,171 shares of Amkor common stock.
Amkor Technology EVP & General Counsel Mark N. Rogers exercised 1,880 restricted stock units into common stock on February 24, 2026, at no cash price under Amkor’s equity plan. To cover tax withholding on this vesting, 806 common shares were withheld at $48.53 per share, leaving him with 38,904 directly owned common shares.
Amkor Technology director David N. Watson exercised stock options for 20,000 shares of common stock on February 25, 2026, converting a Director Stock Option granted in 2016 and fully vested in 2017. A portion of the resulting shares (2,223) was surrendered to cover tax obligations, with no shares bought or sold in the open market.
Amkor Technology Executive Vice President Farshad Haghighi reported a net sale of common stock alongside RSU vesting activity. On February 24, 2026, 1,814 restricted stock units were converted into the same number of common shares at $0.00 per share, and 815 common shares were disposed of at $48.53 to cover tax withholding obligations related to the RSU vesting.
On February 25, 2026, Haghighi executed an open-market sale of 15,624 common shares at an average price of $50.50 per share. Following these transactions, he directly owned 8,354 shares of Amkor common stock.
Amkor Technology, Inc. President and CEO Kevin K. Engel reported multiple equity award transactions dated February 20, 2026. He acquired shares of common stock through the exercise and conversion of restricted stock units granted in 2024 and 2025 under Amkor’s 2021 Equity Incentive Plan. A portion of the resulting common shares, at a value of $47.94 per share, was withheld and disposed of to cover his tax withholding obligations related to the vesting. According to the disclosure, Amkor will pay these taxes on his behalf, so the dispositions reflect tax-withholding rather than open-market sales.
Amkor Technology CFO Megan Faust reported RSU vesting and related share transactions. On February 20, 2026, restricted stock units converted into common stock in multiple exercises, including 16,805 and 18,106 RSUs. The resulting common shares increased her direct ownership.
To cover tax withholding obligations tied to these vestings, the company withheld 7,201 and 7,759 shares of common stock at a price of $47.94 per share, described as tax-withholding dispositions rather than open-market sales. After these transactions, Faust continued to hold common stock directly.
Amkor Technology EVP & General Counsel Mark N. Rogers reported the vesting and conversion of restricted stock units into common stock, along with related tax-withholding transactions, on February 20, 2026. He acquired 7,422 and 8,690 shares of common stock upon RSU vesting, while 3,181 and 3,724 shares were withheld at $47.94 per share to cover tax obligations. The RSUs were granted on February 20, 2024 and February 20, 2025 and vest in three equal annual installments. Following these transactions, Rogers directly owned 37,830 shares of Amkor common stock.
Amkor Technology director Guillaume Rutten reported equity compensation activity involving restricted stock units and common shares. On February 20, 2026, he exercised time-vested RSUs granted under Amkor’s Equity Incentive Plan from February 20, 2024 and February 20, 2025, converting them into common stock at no cash cost. The RSUs were awarded solely in exchange for his service as a company service provider and vest over three years under predefined schedules, resulting in the acquisition of blocks of common shares that he now holds directly.
Amkor Technology Executive Vice President Farshad Haghighi reported RSU vesting and related share withholdings. On February 20, 2026, he acquired common stock through the exercise or conversion of restricted stock units granted under Amkor's 2021 Equity Incentive Plan, tied to awards from February 20, 2024 and February 20, 2025.
To cover tax withholding obligations from these vestings, Amkor withheld shares of common stock at a value of $47.94 per share rather than using cash. Following these transactions, Haghighi directly owned 22,979 shares of Amkor common stock.
Amkor Technology CFO Megan Faust reported multiple equity-related transactions on February 18, 2026. She acquired 4,538 shares of common stock and 9,325 shares of common stock upon vesting of performance stock units that were tied to a basic earnings per share goal for the period from January 1, 2025 through December 31, 2025.
To cover related tax obligations, 1,945 shares and 3,996 shares of common stock were withheld by Amkor at a price of $46.74 per share, as a tax-withholding disposition rather than an open-market sale. Faust also received a new grant of 26,743 restricted stock units, which were awarded for her service as an officer and will vest in three equal annual installments beginning on the first anniversary of the grant date.
Amkor Technology Executive Vice President Farshad Haghighi reported multiple equity compensation transactions. He received 18,185 time-vested restricted stock units on February 18, 2026, granted at no cash cost in recognition of his service. These RSUs vest in three equal annual installments beginning on the first anniversary of the grant date, with full vesting on the third anniversary.
On the same date, 2,003 and 5,594 common shares vested from performance stock units that were originally granted in 2024 and 2025. These awards vested after Amkor met a basic earnings-per-share performance goal over a one-year period from January 1, 2025 to December 31, 2025. To cover related tax obligations at a price of $46.74 per share, 1,038 and 2,621 shares of common stock were withheld and delivered back to the company, reducing out-of-pocket taxes for the executive while keeping these dispositions clearly tied to tax withholding rather than open-market sales.
Rutten Guillaume Marie Jean reported acquisition or exercise transactions in this Form 4 filing.
Amkor Technology director Guillaume Marie Jean Rutten reported the vesting of performance-based stock awards, increasing his direct common share holdings. On February 18, 2026, 10,891 shares of common stock vested from performance-vested restricted stock units granted on February 20, 2024, and 30,587 shares vested from units granted on February 20, 2025.
Both awards were granted under Amkor's Equity Incentive Plan and vested based on achieving a basic earnings per share performance goal over a one-year performance period from January 1, 2025 to December 31, 2025. Following these vestings, Rutten directly owns 380,789 shares of Amkor common stock.
Amkor Technology President and CEO Kevin K. Engel reported equity compensation activity centered on restricted stock units and performance units. On February 18, 2026, he acquired 53,487 and 21,394 restricted stock units, both granted at no cash cost under Amkor’s equity incentive plan.
On the same date, 1,777 and 5,594 shares of common stock vested from performance-based awards tied to a basic earnings per share goal over a one-year period beginning January 1, 2025 and ending December 31, 2025. To cover related tax withholding, 814 and 2,398 common shares were disposed of at $46.74 per share, with the company paying the taxes on Engel’s behalf.
AMKOR TECHNOLOGY, INC. executive vice president and general counsel Mark N. Rogers reported multiple equity-related transactions on February 18, 2026. He received 14,976 restricted stock units granted for his service, which will vest in three equal annual installments starting on the first anniversary of the grant date.
On the same date, 2,003 shares and 4,475 shares of common stock vested from performance-vested restricted stock units granted in 2024 and 2025. These PSUs vested based on achieving a basic earnings per share performance goal over a one-year period from January 1, 2025 to December 31, 2025. The company withheld 859 shares and 1,918 shares to cover tax obligations, and will pay the related taxes on his behalf.
AMKOR TECHNOLOGY, INC. director Guillaume Rutten reported mixed insider activity involving both an RSU vesting and a share sale. On February 17, 2026, he executed an open-market sale of 10,000 shares of common stock at a weighted average price of $45.89 under a pre-arranged Rule 10b5-1 trading plan adopted on June 06, 2025, leaving him with 339,311 common shares directly held. On February 16, 2026, he exercised 13,920 restricted stock units granted on February 16, 2023 into an equal number of common shares at no cost, tied to time-based vesting for his service, and reported 13,919 RSUs still outstanding after the transaction.
Amkor Technology President and CEO Kevin K. Engel reported multiple equity transactions. He sold 5,316 shares of common stock in an open-market transaction at $46.03 per share. He also acquired 1,345 shares of common stock through the exercise of restricted stock units, and 559 shares of common stock were withheld to cover tax obligations upon RSU vesting, with the issuer paying those taxes on his behalf.
Amkor Technology CFO Megan Faust reported RSU vesting and related tax withholding transactions. On February 16, 2026, 4,176 restricted stock units were exercised into 4,176 shares of common stock at $0.00 per share, increasing her directly held common stock to 101,214 shares.
On the same date, 1,912 shares of common stock at $47.48 per share were withheld by Amkor to cover her tax obligations associated with vesting, reducing her direct holdings to 99,302 shares after settlement. These RSUs come from a 16,703-unit grant awarded on February 16, 2023 that vests in four equal annual installments beginning on the first anniversary of the grant date.
Amkor Technology EVP & General Counsel Mark N. Rogers reported multiple equity transactions in company stock. On February 17, 2026, he exercised employee stock options to acquire 5,000 shares of common stock at $7.40 per share and then sold 5,000 shares of common stock at $46.92 per share in an open-market transaction executed under a pre-established Rule 10b5-1 trading plan.
On February 16, 2026, 1,856 restricted stock units vested and converted into common stock, with 796 shares withheld to cover tax obligations, which the company will pay on his behalf. After these transactions, Rogers directly held 24,922 shares of common stock and 100,000 employee stock options.
Amkor Technology Executive Vice President Farshad Haghighi reported equity award activity involving restricted stock units and common shares. On February 16, 2026, 1,789 restricted stock units were exercised or converted and settled into 1,789 shares of common stock at no cash cost to him.
On the same date, 816 common shares were disposed of in a tax-withholding transaction at $47.48 per share, with the shares withheld by Amkor to cover his tax obligations, and the company paying those taxes on his behalf. After these transactions, he held 9,327 common shares directly. Footnotes indicate the original grant was 7,423 RSUs vesting in four equal annual installments beginning February 16, 2024.
Amkor Technology’s major shareholder group reported a large secondary sale of shares. On February 12, 2026, 915 Investments, LP, an entity associated with 10% owner John T. Kim, sold 10,000,000 shares of Amkor common stock at $48.49 per share in an underwritten secondary offering.
After the sale, Form 4 shows 29,594,980 Amkor shares held indirectly through 915 Investments, LP, plus additional direct and indirect holdings through GRATs, family trusts, Sujochil, LP, Kim Capital Partners – KCP, LLC, and Sujoda Investments, LP. Kim treats these interests as having a pecuniary stake but disclaims full beneficial ownership beyond that interest.
915 Investments, LP, a member of a 10% owner group in Amkor Technology, reported selling 10,000,000 shares of Amkor common stock on February 12, 2026. The shares were sold at $48.49 each in an underwritten secondary offering.
After this transaction, 915 Investments, LP directly held 29,594,980 Amkor shares. The filing notes that John T. Kim is the general partner of 915 Investments, LP, and states that the reporting person does not admit beneficial ownership of securities owned by other members of the group.
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 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.