AMKOR TECHNOLOGY, INC.

Semiconductors & Related Devices

AMKR Semiconductors & Electronic Components People in Semiconductors & Electronic Components SEC CIK 0001047127 ↗

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Market capitalisation
$12.82B
247,872,518 shares Covers every share class this company has on file.
Insiders on file
17
people who have filed Form 3, 4 or 5 naming this issuer
Value of insider-held stock
$3.36B
from the holdings reported on Forms 3/4/5; this figure has no separate as-of date on file
Insider-held share of market cap
26.23%
insider-held value divided by market capitalisation

What AMKOR TECHNOLOGY, INC. reports

Revenue and net income below are for fiscal period FY2025, the period label carried by this company’s own annual XBRL filings to the SEC. Fiscal years do not line up between companies — one company’s FY2026 can cover much the same months as another’s FY2025 — so compare the periods, not just the numbers.

Revenue
$6.71B
FY2025 annual revenue, from this company’s own annual XBRL filings to the SEC
Net income
$373.90M
FY2025 profit for the period, from this company’s own annual XBRL filings to the SEC
Employees
30,800
Yahoo Finance
Where the employee count comes from

Headcount comes from Yahoo Finance, not from a filing. The date beside it is the day we retrieved the figure — it is not the date the company counted its staff, and Yahoo does not publish that date. Unlike the SEC filings behind the other figures on this page, this one carries no open licence, so we publish the number and nothing else from that source.

Insiders at AMKOR TECHNOLOGY, INC.

Shares is what each person last reported holding here.

Everyone below has filed at least one insider report against this company.

Value is that share count priced at the same closing price used everywhere else on this site. A row priced from only some of a person’s securities says so — we do not quietly present a partial sum as a complete one.

Rows are grouped by the role each person reports.

The role comes from the relationship boxes a person ticks on their own insider filings — officer, director, ten per cent owner — not from anything we infer. Somebody who is both an officer and a director appears once, in the combined group, so the row count still matches the figure at the top of this page. Where no filing states a role we say so instead of guessing one.

People who file insider reports against AMKOR TECHNOLOGY, INC..
Insider Reported role Shares Value Last action
Officers 1
Mark N. Rogers Mark N. Rogers General Counsel 38,904 $1.86M S Open-market sale Aug 17, 2026 position reported
Officers who also sit on the board 3
Guillaume Marie Jean Rutten CEO 543,866 $25.98M S Open-market sale Aug 6, 2026 position reported
Megan Faust Megan Faust CFO 129,171 $6.17M S Open-market sale Sep 8, 2026 position reported
Robert Randolph Morse Executive Chairman 117,355 $5.61M F Shares withheld for taxes Apr 7, 2026 position reported
Directors 9
Susan Y. Kim Board Member 18,840,698 $900.02M A Grant or award Jun 12, 2026 position reported
Gil C Tily Board Member 123,806 $5.91M M Option exercise or conversion May 13, 2026 position reported
David N. Watson Board Member 120,757 $5.77M M Option exercise or conversion May 13, 2026 position reported
Roger Anthony Carolin Board Member 94,409 $4.51M S Open-market sale May 5, 2026 position reported
MaryFrances McCourt Board Member 55,918 $2.67M M Option exercise or conversion May 13, 2026 position reported
Daniel JL Liao Board Member 40,804 $1.95M M Option exercise or conversion May 14, 2025 position reported
Douglas A. Alexander Board Member 29,109 $1.39M S Open-market sale Aug 7, 2026 position reported
Winston J. Churchill Board Member 25,888 $1.24M G Bona fide gift Jul 30, 2026 position reported
John D. Liu Board Member 2,983 $142.5K M Option exercise or conversion May 14, 2025 position reported
Holders of 10% or more 1
John T. Kim Major Shareholder (10%+) 46,289,663 $2.21B S Open-market sale Feb 12, 2026 position reported
Role not stated in the disclosures we hold 3
David D. Kim Insider 2,707,259 $129.33M P Open-market purchase Aug 1, 2025 position reported
John T. Kim 2024 GRAT #1 dtd. 08/09/2024 Insider 1,194,000 $57.04M G Bona fide gift Nov 4, 2025 position reported
John T. Kim 2024 GRAT #2 dtd. 08/09/2024 Insider 59,250 $2.83M G Bona fide gift Nov 4, 2025 position reported

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

3 insiders bought AMKOR TECHNOLOGY, INC. (AMKR) shares worth $28,946,159 on Aug 1, 2025

Cluster buying

3 different insiders made 3 open-market purchases of this company’s shares within a short window. Each row below is one reported trade.

3 insiders bought AMKOR TECHNOLOGY, INC. (AMKR) shares worth $28,946,159 on Aug 1, 2025
Date Insider Transaction Shares Price Value Filing
Aug 1, 2025 Susan Y. Kim P Open-market purchase 441,589 held after: 3,789,479 $21.85 $9,648,720 SEC filing ↗
Aug 1, 2025 David D. Kim P Open-market purchase 441,589 held after: 3,789,479 $21.85 $9,648,720 SEC filing ↗
Aug 1, 2025 John T. Kim P Open-market purchase 441,589 held after: 3,789,479 $21.85 $9,648,720 SEC filing ↗

Total of the rows above: $28,946,159, in the currency the filings report.

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Mark N. Rogers sold 15,000 AMKOR TECHNOLOGY, INC. (AMKR) shares for $353,700 on Jul 31, 2025

Unusual change in a direct holding

Flagged because the change that day in the shares this person holds directly was unusually large compared with their own earlier changes. The rows below are the open-market trades reported that day; under each share count is the balance the filing reports after that line.

Mark N. Rogers sold 15,000 AMKOR TECHNOLOGY, INC. (AMKR) shares for $353,700 on Jul 31, 2025
Date Insider Transaction Shares Price Value Filing
Jul 31, 2025 Mark N. Rogers S Open-market sale 15,000 held after: 23,862 $23.58 $353,700 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

3 insiders bought AMKOR TECHNOLOGY, INC. (AMKR) shares worth $56,999,986 on Feb 24, 2025

Cluster buying

3 different insiders made 3 open-market purchases of this company’s shares within a short window. Each row below is one reported trade.

3 insiders bought AMKOR TECHNOLOGY, INC. (AMKR) shares worth $56,999,986 on Feb 24, 2025
Date Insider Transaction Shares Price Value Filing
Feb 24, 2025 Susan Y. Kim P Open-market purchase 869,565 held after: 3,347,890 $21.85 $18,999,995 SEC filing ↗
Feb 24, 2025 David D. Kim P Open-market purchase 869,565 held after: 3,347,890 $21.85 $18,999,995 SEC filing ↗
Feb 24, 2025 John T. Kim P Open-market purchase 869,565 held after: 3,347,890 $21.85 $18,999,995 SEC filing ↗

Total of the rows above: $56,999,986, in the currency the filings report.

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Recent insider transactions

Of the 227 rows we hold, 6 are open-market purchases (P) and 48 open-market sales (S) — the only codes we count as buying or selling.

The rest — awards, shares withheld to pay tax, option exercises, gifts and so on — follow from an employment contract or a transfer arranged off-market, not from a decision to buy or sell, so counting them would turn this into a pay table.

A price of 0.00 is a real reported figure on gifts (G) and share awards (A) — not a gap in our data.

Insider transactions disclosed to the SEC for AMKOR TECHNOLOGY, INC., newest first, each with the filing behind it.
Date Insider Transaction Shares Price Value Filing
Sep 8, 2026 Megan Faust S Open-market sale 1,000 $49.05 $49.1K SEC filing ↗
Aug 17, 2026 Mark N. Rogers S Open-market sale 5,000 $59.78 $298.9K SEC filing ↗
Aug 17, 2026 Mark N. Rogers M Option exercise or conversion 5,000 $7.40 $37.0K SEC filing ↗
Aug 11, 2026 Megan Faust S Open-market sale 1,000 $54.45 $54.5K SEC filing ↗
Aug 7, 2026 Douglas A. Alexander S Open-market sale 5,000 $55.81 $279.1K SEC filing ↗
Aug 7, 2026 Douglas A. Alexander M Option exercise or conversion 5,000 $8.51 $42.6K SEC filing ↗
Aug 6, 2026 Guillaume Marie Jean Rutten S Open-market sale 25,000 $54.50 $1.36M SEC filing ↗
Aug 5, 2026 Guillaume Marie Jean Rutten S Open-market sale 25,000 $55.35 $1.38M SEC filing ↗
Jul 30, 2026 Winston J. Churchill G Bona fide gift 100 $0.00 $0 SEC filing ↗
Jul 16, 2026 Mark N. Rogers S Open-market sale 5,000 $65.12 $325.6K SEC filing ↗
Jul 16, 2026 Mark N. Rogers M Option exercise or conversion 5,000 $7.40 $37.0K SEC filing ↗
Jul 14, 2026 Megan Faust S Open-market sale 1,000 $69.91 $69.9K SEC filing ↗
Jun 30, 2026 Megan Faust F Shares withheld for taxes 3,725 $86.23 $321.2K SEC filing ↗
Jun 30, 2026 Megan Faust M Option exercise or conversion 8,692 $0.00 $0 SEC filing ↗
Jun 30, 2026 Guillaume Marie Jean Rutten M Option exercise or conversion 8,692 $0.00 $0 SEC filing ↗
Jun 16, 2026 Mark N. Rogers S Open-market sale 5,000 $86.21 $431.1K SEC filing ↗
Jun 16, 2026 Mark N. Rogers M Option exercise or conversion 5,000 $7.40 $37.0K SEC filing ↗
Jun 12, 2026 Winston J. Churchill S Open-market sale 5,000 $78.20 $391.0K SEC filing ↗
Jun 12, 2026 Winston J. Churchill M Option exercise or conversion 5,000 $19.39 $97.0K SEC filing ↗
Jun 12, 2026 Susan Y. Kim A Grant or award 9,893 $0.00 $0 SEC filing ↗
Jun 9, 2026 Megan Faust S Open-market sale 1,000 $70.30 $70.3K SEC filing ↗
May 19, 2026 Megan Faust S Open-market sale 1,000 $64.60 $64.6K SEC filing ↗
May 18, 2026 Mark N. Rogers S Open-market sale 5,000 $71.63 $358.2K SEC filing ↗
May 18, 2026 Mark N. Rogers M Option exercise or conversion 5,000 $7.40 $37.0K SEC filing ↗
May 13, 2026 MaryFrances McCourt M Option exercise or conversion 9,893 $0.00 $0 SEC filing ↗

From SEC Form 4 filings. Every row links to the filing it came from. How we calculate this.

What a Form 4 is

The report an officer, director or large shareholder must file after trading their own company’s stock.

Corporate ownership links — 10 filers hold a position

Who owns AMKOR TECHNOLOGY, INC.

Each row is one filer naming this company.

Funds, trusts and other companies file the same ownership forms that executives do. Everything below is taken from those filings, with the position exactly as the filing states it.

Filers holding a position in AMKOR TECHNOLOGY, INC.

Funds, trusts and companies that disclose an ownership position in AMKOR TECHNOLOGY, INC..
Owner Reported role Shares Filed
915 Investments, LP Other 29,594,980
SUJODA Investments, LP Other 3,789,479
Sujoda Management, LLC Other 3,789,479
2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 Other 1,235,000
2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024 Other 1,124,000
2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 Other 895,000
2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 Other 0
2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 Other 0
2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 Other 0
James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021 Other 0

See the full ownership map — every entity that files as an owner of a US public company.

Subsidiaries — 19 legal entities

Subsidiaries of AMKOR TECHNOLOGY, INC.

19 legal entities named in the subsidiary exhibit filed with this company’s most recent 10-K. . Filing on SEC.gov.

This is not the full list. SEC rules only require a company to name its significant subsidiaries.

What that leaves out

Smaller entities are left out of the exhibit entirely. A short list here means a short exhibit — it does not mean the company owns nothing else. Nothing on this page is inferred: every name below is copied from the filing.

Subsidiaries AMKOR TECHNOLOGY, INC. names in its most recent annual report, with the place each one is organised.
Subsidiary Organised in
Amkor Advanced Technology Taiwan, Inc. Taiwan
Amkor Assembly & Test (Shanghai) Co., Ltd. China
Amkor Technology Arizona, Inc. Arizona
Amkor Technology Euroservices, S.A.S. France
Amkor Technology Germany GmbH Germany
Amkor Technology Japan, Inc. Japan
Amkor Technology Korea, Inc. Korea
Amkor Technology Malaysia Sdn. Bhd. Malaysia
Amkor Technology Philippines, Inc. Philippines
Amkor Technology Pte. Ltd. Singapore
Amkor Technology Singapore Holding Pte. Ltd. Singapore
Amkor Technology Singapore Holding Pte. Ltd., Taiwan Branch Taiwan
Amkor Technology Singapore Investment Pte. Ltd. Singapore
Amkor Technology Taiwan Ltd. Taiwan
Amkor Technology Vietnam Limited Liability Company Vietnam
Amkor Worldwide Services LLC Delaware
Amkor Worldwide Services LLC - ROHQ Philippines
ATEP - Amkor Technology Portugal, S.A. Portugal
Guardian Assets, Inc. Delaware
What counts as a subsidiary

A subsidiary is a separate legal entity this company controls; it is not the same thing as a brand, a division or an office. These entities do not file with the SEC in their own right, so there is no separate page to open for them.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Sources and technical notes

Every figure on this page comes from filings to the U.S. SEC via EDGAR. Nothing here is estimated, and nothing is taken from press coverage or company websites.

Share count: cover page of the latest filing (dei:EntityCommonStockSharesOutstanding), taken from AMKOR TECHNOLOGY, INC.’s own filings and multiplied by our closing price. Full method.

What that share count means

the share count the company itself prints on the cover of its most recent filing, as of the date it signed that filing.

We do not take a market cap from a data vendor, and we do not estimate one: the figure is a share count from AMKOR TECHNOLOGY, INC.’s own SEC filings multiplied by the closing price we hold for the same stock.

Logo: Grmike / Public domain , via Wikimedia Commons ↗ — used here to identify the company. Trademarks remain the property of their owner.