What SEC filings does Amkor Technology, Inc. submit to the SEC?

Amkor Technology, Inc. (AMKR) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about AMKR?

A Form 4 for AMKR discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Amkor Technology, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for AMKR?

The 10-K is Amkor Technology, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all AMKR SEC filings directly on EDGAR?

You can view all historical Amkor Technology, Inc. filings on the SEC EDGAR company page for AMKR. Each filing card on this page links directly to the original SEC document.

How often does Amkor Technology, Inc. file with the SEC?

Amkor Technology, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling AMKR shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

AMKR SEC Filing News — Amkor Technology, Inc.

Latest SEC filings for Amkor Technology, Inc. (AMKR) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-10-15.

Amkor Technology, Inc. provides outsourced semiconductor packaging and test services in the United States, Japan, Europe, and the Asia Pacific. It offers turnkey packaging and test services, including semiconductor wafer bump, wafer probe, wafer back-grind, package design, packaging, burn-in, system-level and final test, and drop shipment services; flip chip scale package products for smartphones, tablets, and other mobile consumer electronic devices; flip chip stacked chip scale packages that a…

Sector: Technology Industry: Semiconductor Equipment & Materials Market Cap: $10.4B

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for AMKR currently lean bearish. Of the 20 filing records displayed, 6 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

AMKR Filing Activity Snapshot 2026-08-11 — 2026-10-15

Insider Transactions (Form 4)

0 buys vs 6 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$298.9K

ROGERS MARK N (EVP & General Counsel) · 2026-08-19

5,000 shares · Form 4

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 16 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 16 filings in this group are Form 4s for Amkor Technology, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 16 insider filings shown, the breakdown is 10 compensation award and 6 open-market sale. 6 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×10: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market sale ×6: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Form 4 Open-market sale Insider Selling 2026-10-15

AMKR insider Faust Megan (CFO) sold 1,000 shares (~$46.9K)

Faust Megan, listed as CFO at AMKOR TECHNOLOGY, INC., reported an open-market sale of 1,000 AMKR shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	1,000	$46.92	$46.9K

Filing: Form 4 (Insider Transaction) Insider: Faust Megan (CFO) Shares: 1,000 Est. Value: $46.9K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-10-06

AMKR insider ALEXANDER DOUGLAS A (Director) sold 5,000 shares (~$275.0K)

ALEXANDER DOUGLAS A, listed as Director at AMKOR TECHNOLOGY, INC., reported an open-market sale of 5,000 AMKR shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	5,000	$8.51	$42.5K
`S`	Open-market sale	5,000	$55.00	$275.0K
`M`	Option exercise derivative · Director Stock Option (Right-to-Buy)	5,000	—	—

Filing: Form 4 (Insider Transaction) Insider: ALEXANDER DOUGLAS A (Director) Shares: 5,000 Est. Value: $275.0K

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

KIM SUSAN Y (Director, 10% Owner) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: KIM SUSAN Y (Director, 10% Owner)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

WATSON DAVID N (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: WATSON DAVID N (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

Tily Gil C. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: Tily Gil C. (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

Rutten Guillaume Marie Jean (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: Rutten Guillaume Marie Jean (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

Morse Robert Randolph (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	12	—	—
`A`	Compensation award derivative · Restricted Stock Units	14	—	—
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: Morse Robert Randolph (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

McCourt MaryFrances (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	12	—	—
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: McCourt MaryFrances (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

Liao Daniel JL (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	14	—	—
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: Liao Daniel JL (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

CHURCHILL WINSTON J (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: CHURCHILL WINSTON J (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

Carolin Roger Anthony (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	12	—	—
`A`	Compensation award derivative · Restricted Stock Units	14	—	—
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: Carolin Roger Anthony (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-24

AMKR insider Form 4 filed for equity award, exercise, or tax withholding

ALEXANDER DOUGLAS A (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	13	—	—
`A`	Compensation award derivative · Restricted Stock Units	12	—	—
`A`	Compensation award derivative · Restricted Stock Units	14	—	—
`A`	Compensation award derivative · Restricted Stock Units	3	—	—

Filing: Form 4 (Insider Transaction) Insider: ALEXANDER DOUGLAS A (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-09-10

AMKR insider Faust Megan (CFO) sold 1,000 shares (~$49.0K)

Faust Megan, listed as CFO at AMKOR TECHNOLOGY, INC., reported an open-market sale of 1,000 AMKR shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	1,000	$49.05	$49.0K

Filing: Form 4 (Insider Transaction) Insider: Faust Megan (CFO) Shares: 1,000 Est. Value: $49.0K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-19

AMKR insider ROGERS MARK N (EVP & General Counsel) sold 5,000 shares (~$298.9K)

ROGERS MARK N, listed as EVP & General Counsel at AMKOR TECHNOLOGY, INC., reported an open-market sale of 5,000 AMKR shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	5,000	$7.40	$37.0K
`S`	Open-market sale	5,000	$59.78	$298.9K
`M`	Option exercise derivative · Employee Stock Option (Right-to-Buy)	5,000	—	—

Filing: Form 4 (Insider Transaction) Insider: ROGERS MARK N (EVP & General Counsel) Shares: 5,000 Est. Value: $298.9K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-13

AMKR insider Faust Megan (CFO) sold 1,000 shares (~$54.5K)

Faust Megan, listed as CFO at AMKOR TECHNOLOGY, INC., reported an open-market sale of 1,000 AMKR shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	1,000	$54.45	$54.5K

Filing: Form 4 (Insider Transaction) Insider: Faust Megan (CFO) Shares: 1,000 Est. Value: $54.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-11

AMKR insider ALEXANDER DOUGLAS A (Director) sold 5,000 shares (~$279.1K)

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	5,000	$8.51	$42.5K
`S`	Open-market sale	5,000	$55.81	$279.1K
`M`	Option exercise derivative · Director Stock Option (Right-to-Buy)	5,000	—	—

Filing: Form 4 (Insider Transaction) Insider: ALEXANDER DOUGLAS A (Director) Shares: 5,000 Est. Value: $279.1K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 4 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Amkor Technology, Inc. has 4 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-10-13

AMKR Form 144 filed for proposed insider sale by MEGAN FAUST (1,000 shares) ~$46.9K

MEGAN FAUST filed a Form 144 with the SEC indicating intent to sell AMKR (AMKOR TECHNOLOGY, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: MEGAN FAUST Shares: 1,000 Est. Value: $46.9K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-10-02

AMKR Form 144 filed for proposed insider sale by DOUGLAS A ALEXANDER (5,000 shares) ~$275.0K

DOUGLAS A ALEXANDER filed a Form 144 with the SEC indicating intent to sell AMKR (AMKOR TECHNOLOGY, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: DOUGLAS A ALEXANDER Shares: 5,000 Est. Value: $275.0K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-09-08

AMKR Form 144 filed for proposed insider sale by MEGAN FAUST (1,000 shares) ~$49.0K

Filing: Form 144 (Proposed Sale Notice) Insider: MEGAN FAUST Shares: 1,000 Est. Value: $49.0K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-17

AMKR Form 144 filed for proposed insider sale by MARK N ROGERS (5,000 shares) ~$298.9K

MARK N ROGERS filed a Form 144 with the SEC indicating intent to sell AMKR (AMKOR TECHNOLOGY, INC.) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: MARK N ROGERS Shares: 5,000 Est. Value: $298.9K

View on SEC EDGAR → Open Filing Document →

How we classify Amkor Technology, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on AMKR. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — AMKR SEC Filings

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AMKR Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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