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.
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. files its Form 10-K outlining 2025 performance and strategy as a leading outsourced semiconductor assembly and test provider. Net sales reached $6,708 million, with Advanced Products contributing $5,556 million, or 82.8%, and Mainstream Products $1,152 million, or 17.2%.
The company highlights strength in advanced system-in-package modules with about $3,080 million of 2025 net sales and exposure across communications, computing, automotive/industrial and consumer markets. It is scaling a Vietnam facility opened in 2024 and constructing a new Arizona facility to support regionalized supply chains.
Customer concentration remains high: the ten largest customers represented 72% of 2025 net sales, including Apple at 29.8% and Qualcomm at 11.1%. Amkor employed 30,800 people as of December 31, 2025 and invested $166.7 million in research and development.
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.
An insider of AMKR has filed a notice of proposed sale under Rule 144 covering 5,316 shares of common stock, with an aggregate market value of 244,719.40. The shares are to be sold through Morgan Stanley Smith Barney LLC on the NASDAQ around 02/17/2026.
The shares derive from restricted stock awards acquired on 09/30/2025 (349 shares) and 12/31/2025 (4,967 shares), both from the issuer. The notice also reports that during the prior three months, the same account holder sold 11,000 common shares for gross proceeds of 508,292.40. Shares outstanding were 247,193,437 at the time referenced.