AMKR on Nasdaq

Amkor Technology

Logo: Grmike, Public domain, via Wikimedia Commons5

American semiconductor company

Amkor Technology, Inc. is an American semiconductor product packaging and test services provider. The company has been headquartered in Arizona since 2005, when it was moved from West Chester, Pennsylvania, also in the United States. The company's Arizona headquarters was originally in Chandler, then later moved to Tempe.3 Its shares trade on Nasdaq under the symbol AMKR.1 Wikipedia text CC BY-SA 4.0

Price unavailable

Last updated Oct 21, 2026.

Overview

1968Founded1

Compare with GlobalFoundries, United Microelectronics Corporation or onsemi, or pick any stock.

  • TickerAMKR on Nasdaq1
  • IndustrySemiconductors & Related Devices1
  • HeadquartersTempe1
  • Websiteamkor.com
  • Legal formDelaware corporation1
  • Incorporated inDE6
  • Business address2045 East Innovation Circle, Tempe, Az 852846
  • Filer categoryLarge accelerated filer6
  • LEI529900VHLRTKPWZJBM844
  • StatusActive4
  • LEI statusIssued and current4
  • Registered address2045 East Innovation Circle, 85284 Tempe, United States4
  • Registered withDivision of Corporations, Department of State, 27931864

Amkor Technology, Inc. is an American semiconductor product packaging and test services provider. The company has been headquartered in Arizona since 2005, when it was moved from West Chester, Pennsylvania, also in the United States. The company's Arizona headquarters was originally in Chandler, then later moved to Tempe. The company was founded in 1968 and, as of 2022, has approximately 31,000 employees worldwide and a reported $7.1 billion in sales.3

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

14.0%Gross margin9
7.0%Operating margin9
5.6%Net margin9
6.2%Revenue growth, 20259
8.4%Return on equity9
0.29×Debt to equity9
$191.0MFree cash flow9

What sells

Revenue by product, business segment and region, as the company reports it to the SEC.

Products and services

Advanced Products brought in 83% of the revenue Amkor Technology broke down this way in fiscal 2025.

  1. Advanced Products$5.6B983%up 7% from 2024
  2. Mainstream Products$1.2B917%up 1% from 2024
Products and services by year
Products and services202320242025
Advanced Products$5.0B$5.2B$5.6B
Mainstream Products$1.5B$1.1B$1.2B

Regions

United States brought in 66% of the revenue Amkor Technology broke down this way in fiscal 2025.

  1. United States$4.4B966%up 10% from 2024
  2. EMEA$852.8M913%up 4% from 2024
  3. Asia Pacific Excluding Japan$733.5M911%up 2% from 2024
  4. Japan$724.6M911%down 10% from 2024
Regions by year
Regions202320242025
United States$3.8B$4.0B$4.4B
EMEA$1.0B$817.9M$852.8M
Asia Pacific Excluding Japan$704.5M$716.3M$733.5M
Japan$935.6M$800.7M$724.6M

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Cost of revenue86¢$5.8B
  • Research and development2¢$166.7M
  • Selling, general and admin5¢$304.5M
  • Income tax1¢$68.5M
  • Profit6¢$373.9M

Out of $6.7B in revenue.9

Where each dollar of operating cash went, fiscal 2025

  • Capital spending83¢$904.6M
  • Dividends paid7¢$81.9M
  • Kept or used elsewhere10¢$109.0M

Out of $1.1B of cash from operations.9

Financial statements

Revenue101112139$6.7B in 2025+66% since 2019
0$2.0B$4.0B$6.0B$8.0B2019: $4.1B$4.1B20192020: $5.1B$5.1B2020+25%2021: $6.1B$6.1B2021+22%2022: $7.1B$7.1B2022+16%2023: $6.5B$6.5B2023−8%2024: $6.3B$6.3B2024−3%2025: $6.7B$6.7B2025+6%
Gross profit101112139$938.6M in 2025+45% since 2019
0$500.0M$1.0B$1.5B2019: $649.4M$649.4M20192020: $900.8M$900.8M2020+39%2021: $1.2B$1.2B2021+36%2022: $1.3B$1.3B2022+9%2023: $943.2M$943.2M2023−29%2024: $933.2M$933.2M2024−1%2025: $938.6M$938.6M2025+1%
Operating income101112139$467.4M in 2025+100% since 2019
0$250.0M$500.0M$750.0M$1.0B2019: $233.2M$233.2M20192020: $457.2M$457.2M2020+96%2021: $763.4M$763.4M2021+67%2022: $897.2M$897.2M2022+18%2023: $470.3M$470.3M2023−48%2024: $438.5M$438.5M2024−7%2025: $467.4M$467.4M2025+7%
Net income101112139$373.9M in 2025+209% since 2019
0$200.0M$400.0M$600.0M$800.0M2019: $120.9M$120.9M20192020: $338.1M$338.1M2020+180%2021: $643.0M$643.0M2021+90%2022: $765.8M$765.8M2022+19%2023: $359.8M$359.8M2023−53%2024: $354.0M$354.0M2024−2%2025: $373.9M$373.9M2025+6%

Every line of the income statement as filed: the last 3 fiscal years, latest first.9

Period ending2025-12-312024-12-312023-12-31
Net sales$6.7B$6.3B$6.5B
Cost of sales$5.8B$5.4B$5.6B
Gross profit$938.6M$933.2M$943.2M
Selling, general and administrative$304.5M$331.8M$295.4M
Research and development$166.7M$163.0M$177.5M
Total operating expenses$471.2M$494.8M$472.9M
Operating income$467.4M$438.5M$470.3M
Interest expense$75.4M$64.9M$59.0M
Other (income) expense, net-$52.7M-$57.5M-$32.6M
Total other expense, net$22.8M$7.4M$26.4M
Income before taxes$444.6M$431.0M$443.8M
Total tax provision and effective tax rate$68.5M$75.5M$81.7M
Net income$376.1M$355.5M$362.1M
Net income attributable to noncontrolling interests-$2.2M-$1.5M-$2.3M
Net income attributable to Amkor$373.9M$354.0M$359.8M
Basic (in dollars per share)$1.51$1.44$1.46
Diluted (in dollars per share)$1.50$1.43$1.46
Basic (in shares)247.1M shares246.3M shares245.6M shares
Diluted (in shares)248.5M shares247.8M shares247.2M shares

Compare Amkor Technology with another company

Corporate structure

Amkor Technology sits at the top of its group. 19 entities, 11 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of Amkor Technology

  • James J. Kim Filed SCHEDULE 13D/A on Amkor Technology, latest May 5, 2026 (6 filings since Jan 4, 2022)
  • DIMENSIONAL FUND ADVISORS LP Filed SCHEDULE 13G/A on Amkor Technology, latest Apr 9, 2026 (4 filings since Feb 8, 2022)
  • VANGUARD GROUP INC Filed SCHEDULE 13G/A on Amkor Technology, latest Mar 26, 2026 (3 filings since Feb 9, 2023)
  • BlackRock Filed SC 13G/A on Amkor Technology, latest Jul 8, 2024 (3 filings since Feb 3, 2023)
  • Amkor Technology Tempe, Arizona, United States
    • Amkor Advanced Technology Taiwan, Inc. Subsidiary · Arizona, Arizona, United States
    • Amkor Assembly & Test (Shanghai) Co., Ltd. Subsidiary · China
    • Amkor Technology Arizona, Inc. Subsidiary · Arizona, United States
    • Amkor Technology Euroservices, S.A.S. Subsidiary · France
    • Amkor Technology Germany GmbH Subsidiary · Germany
    • Amkor Technology Japan, Inc. Subsidiary · Japan
    • Amkor Technology Malaysia Sdn. Bhd. Subsidiary · Malaysia
    • Amkor Technology Philippines, Inc. (A Branch of a Singapore Company) Subsidiary · Philippines
    • AMKOR TECHNOLOGY SINGAPORE HOLDING PTE. LTD. Subsidiary · Singapore, Singapore
      • Amkor Technology Philippines Inc Branch · Singapore, Singapore
    • Amkor Technology Singapore Holding Pte. Ltd., Taiwan Branch (A Branch of a Singapore Company) Subsidiary · Taiwan
    • Amkor Technology Singapore Investment Pte. Ltd. Subsidiary · Singapore
    • AMKOR TECHNOLOGY TAIWAN LTD. (艾克爾國際科技股份有限公司) Subsidiary · Arizona, Arizona, United States
    • Amkor Technology Vietnam Limited Liability Company Subsidiary · Vietnam
    • Amkor Worldwide Services LLC Subsidiary · Delaware, United States
    • Amkor Worldwide Services LLC - ROHQ (A Branch of a United States Company) Subsidiary · Philippines
    • ATEP - Amkor Technology Portugal, S.A. Subsidiary · Portugal
    • Guardian Assets, Inc. Subsidiary · Delaware, United States

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Amkor Technology reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

ItemLatestA year beforeChange
Operating-lease assets (leased space)$93.4M9 Dec 31, 2025$109.7M9 Dec 31, 2024−14.8%

Real estate and locations

ItemLatestA year beforeChange
Area of land56 acres9 Dec 31, 2024

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$1.4B9 Dec 31, 2025$1.1B9 Dec 31, 2024+21.6%
Marketable securities, current$613.0M9 Dec 31, 2025$513.0M9 Dec 31, 2024+19.5%

Intangibles and goodwill

ItemLatestA year beforeChange
Goodwill$18.0M9 Dec 31, 2025$17.9M9 Dec 31, 2024+0.3%

Inventory

ItemLatestA year beforeChange
Inventory, total$437.8M9 Dec 31, 2025$310.9M9 Dec 31, 2024+40.8%

Properties, in its own words

The location and size of our manufacturing and research and development facilities are set forth in the table below. All facilities are owned unless otherwise specified.

Approximate Facility Size(Square Feet)

The rest of Item 2

Owned · Leased · Total

China (1) · 1,398,000 · — · 1,398,000

Japan (2) · 1,489,000 · 286,000 · 1,775,000

Korea (2) · 4,481,000 · — · 4,481,000

Malaysia (1) · 434,000 · — · 434,000

Philippines (3) · 765,000 · 557,000 · 1,322,000

Portugal · 583,000 · — · 583,000

Taiwan (1) · 1,161,000 · 12,000 · 1,173,000

Vietnam (1) · 1,467,000 · — · 1,467,000

Total all facilities · 11,778,000 · 855,000 · 12,633,000

(1)Land is leased.

(2)Certain facilities and land are pledged as collateral in Japan for indebtedness incurred and in Korea for certain government incentives.

(3)As a result of foreign ownership restrictions in the Philippines, the land is leased. A portion of the land we lease is owned by realty companies in which we own a 40% interest.

During 2025, we began construction of the first phase of the Arizona Facility, which will have approximately 1.8 million square feet of space. Manufacturing is expected to begin in the first half of 2028.

Our executive offices, which are leased, are located in Arizona and Singapore. We believe that our existing properties are in good condition and suitable for the conduct of our business and that the productive capacity of such properties is substantially being utilized or we have plans to utilize it.

Item 2 of the 10-K filed Feb 20, 2026.17

The story

Amkor's origins can be traced back to ANAM Industries, a business in Seoul dealing with imported Japanese goods, including bicycles, and founded by Hyang-Soo Kim in 1935. In March 1968, ANAM Industries underwent a transformation into ANAM Industrial Co. Ltd., becoming South Korea's first semiconductor business. One month later, his son Joo-Jin (James) Kim founded Amkor Electronics, Inc. and inaugurated its sales office in Philadelphia. Its semiconductor production and export began in 1970. In 1998, Amkor began publicly trading on Nasdaq.

In 2000, Amkor acquired Integra Technologies, an Outsourced Semiconductor Assembly And Test (OSAT) provider in the United States. In 2005, Amkor spun off Integra Technologies.

In February 2016, Amkor fully acquired J-Devices Corp, the largest Outsourced Semiconductor Assembly And Test (OSAT) provider in Japan.

In June 2017, Amkor Technology was recognized as Supplier of the Year for 2016 by Qualcomm Technologies for a second consecutive year.

Amkor Technology has competitiveness for chip assembly by thermal compression as well as wafer level packaging. In September 2018, Amkor Technology opened a manufacturing and test plant at Longtan Science Park in Taiwan.

In 2019, Amkor Technology was ranked 2nd in overall revenue in the OSAT (Outsourced Semiconductor Assembly and Test) market.

ASE Technology – $11.87 Billion

Amkor Technology – $7.1 Billion

Read the full text

JCET – $3.97 Billion

SPIL – $2.79 Billion

Powertech Technology – $2.17 Billion

A $2 billion factory for advanced packaging of chips from TSMC in Arizona was announced in November 2023. In late August 2025, the location for the facility was shifted to the Peoria Innovation Core after the city of Peoria acquired land for the project.

From Wikipedia’s article on Amkor Technology, shared under CC BY-SA 4.0.7

Leadership

Who has led Amkor Technology, and when. Pick a name to see everywhere that person has worked.

Board members and other officers (37)

Products and brands

Amkor's designs, packages and tests semiconductors for other companies. The company's offers include RF-antenna designs incorporated directly into or onto a chip, CMOS imaging sensors or flip chip packaging with copper pillar bumps. Amkor also offers wire bonding of semiconductors to packages as well as a technology to prevent edge gaps and cracks on semiconductor packaging called "Edge Protection".

From Wikipedia’s article on Amkor Technology, shared under CC BY-SA 4.0.7

Subsidiaries and ownership

Subsidiaries (Exhibit 21)

  • ATEP - Amkor Technology Portugal, S.A. Portugal8
  • Amkor Advanced Technology Taiwan, Inc. Taiwan8
  • Amkor Assembly & Test (Shanghai) Co., Ltd. China8
  • Amkor Technology Arizona, Inc. Arizona8
  • Amkor Technology Euroservices, S.A.S. France8
  • Amkor Technology Germany GmbH Germany8
  • Amkor Technology Japan, Inc. Japan8
  • Amkor Technology Malaysia Sdn. Bhd. Malaysia8
  • Amkor Technology Philippines, Inc. (A Branch of a Singapore Company) Philippines8
  • Amkor Technology Pte. Ltd. Singapore8
  • Amkor Technology Singapore Holding Pte. Ltd. Singapore8
  • Amkor Technology Singapore Holding Pte. Ltd., Taiwan Branch (A Branch of a Singapore Company) Taiwan8
  • Amkor Technology Singapore Investment Pte. Ltd. Singapore8
  • Amkor Technology Taiwan Ltd. Taiwan8
  • Amkor Technology Vietnam Limited Liability Company Vietnam8
  • Amkor Worldwide Services LLC Delaware8
  • Amkor Worldwide Services LLC - ROHQ (A Branch of a United States Company) Philippines8
  • Guardian Assets, Inc. Delaware8

The subsidiaries the company lists in Exhibit 21 of its annual report, as filed.

Former names

  • AMKOR TECHNOLOGY INCOct 22, 1997 to Feb 19, 20156

Timeline

  1. Jul 27, 20268-K Results of operations62
  2. May 21, 20268-K Regulation FD disclosure63
  3. May 19, 20268-K Shareholder vote64
  4. May 5, 20268-K Entered a material agreement; New debt or obligation; Unregistered sale of shares65
  5. May 1, 20268-K Other events66
  6. Apr 30, 20268-K Other events67
  7. Apr 27, 20268-K Results of operations68
  8. Feb 18, 2026New chief executive Kevin Engel becomes CEO18
  9. Feb 13, 20268-K Other events69
  10. Feb 9, 20268-K Results of operations70
  11. Feb 2, 20268-K Executive or director change71
  12. Nov 3, 20258-K Executive or director change72
  13. Oct 27, 20258-K Results of operations; Executive or director change; Regulation FD disclosure73
  14. Jul 30, 2020New chief executive Guillaume Marie Jean Rutten becomes CEO19
  15. May 8, 2013New chief executive Stephen Douglas Kelley becomes CEO20
  16. Feb 5, 2010New chief executive Kenneth T. Joyce becomes CEO21
  17. 1968Founded Founded1

Calendar

Coming up

  1. Oct 26, 2026 · After the closeReports results for the quarter ending Sep/2026 A year earlier it reported $0.51 a share, on Oct 27, 2025.74

When it reported results

  1. Jul 27, 2026Reported quarterly or annual results62
  2. Apr 27, 2026Reported quarterly or annual results68
  3. Feb 9, 2026Reported quarterly or annual results70
  4. Oct 27, 2025Reported quarterly or annual results73
  5. Jul 28, 2025Reported quarterly or annual results75
  6. Apr 28, 2025Reported quarterly or annual results76
  7. Feb 10, 2025Reported quarterly or annual results77
  8. Oct 28, 2024Reported quarterly or annual results78

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). The full markets calendar

Filings

828 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 44 major events, 643 insider forms, 16 large holders, 105 other. The latest 20:

  1. Oct 15, 20264 EDGAR
  2. Oct 13, 2026144 EDGAR
  3. Oct 6, 20264 EDGAR
  4. Oct 2, 2026144 EDGAR
  5. Sep 24, 20264 EDGAR
  6. Sep 24, 20264 EDGAR
  7. Sep 24, 20264 EDGAR
  8. Sep 24, 20264 EDGAR
  9. Sep 24, 20264 EDGAR
  10. Sep 24, 20264 EDGAR
  11. Sep 24, 20264 EDGAR
  12. Sep 24, 20264 EDGAR
  13. Sep 24, 20264 EDGAR
  14. Sep 24, 20264 EDGAR
  15. Sep 10, 20264 EDGAR
  16. Sep 8, 2026144 EDGAR
  17. Aug 19, 20264 EDGAR
  18. Aug 17, 2026144 EDGAR
  19. Aug 13, 20264 EDGAR
  20. Aug 11, 2026144 EDGAR

The 828 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

144 open-market trades by officers, directors and large owners since October 2021: 12 buys and 132 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Sep 8, 2026Faust MeganCFOSale1,000$49.05$49.0KForm 4
Aug 17, 2026ROGERS MARK NEVP & General CounselSale5,000$59.78$298.9KForm 4
Aug 11, 2026Faust MeganCFOSale1,000$54.45$54.5KForm 4
Aug 7, 2026ALEXANDER DOUGLAS ADirectorSale5,000$55.81$279.1KForm 4
Aug 6, 2026Rutten Guillaume Marie JeanDirectorSale25,000$54.50$1.4MForm 4
Aug 5, 2026Rutten Guillaume Marie JeanDirectorSale25,000$55.35$1.4MForm 4
Jul 30, 2026Engel Kevin K.President and CEOSale3,221$47.00$151.4KForm 4
Jul 16, 2026ROGERS MARK NEVP & General CounselSale5,000$65.12$325.6KForm 4
Jul 14, 2026Faust MeganCFOSale1,000$69.91$69.9KForm 4
Jun 16, 2026ROGERS MARK NEVP & General CounselSale5,000$86.21$431.1KForm 4
Jun 12, 2026CHURCHILL WINSTON JDirectorSale5,000$78.20$391.0KForm 4
Jun 9, 2026Faust MeganCFOSale1,000$70.30$70.3KForm 4
May 19, 2026Faust MeganCFOSale1,000$64.60$64.6KForm 4
May 18, 2026ROGERS MARK NEVP & General CounselSale5,000$71.63$358.1KForm 4
May 11, 2026Tily Gil C.DirectorSale15,000$77.30$1.2MForm 4
May 8, 2026Rutten Guillaume Marie JeanDirectorSale50,000$74.28$3.7MForm 4
May 5, 2026Carolin Roger AnthonyDirectorSale20,000$76.24$1.5MForm 4
May 5, 2026CHURCHILL WINSTON JDirectorSale7,000$76.45$535.1KForm 4
May 5, 2026ALEXANDER DOUGLAS ADirectorSale5,000$76.58$382.9KForm 4
Apr 16, 2026ROGERS MARK NEVP & General CounselSale5,000$59.43$297.1KForm 4

All 144 trades can be filtered by person here when JavaScript is on.

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Executive pay

What the company paid its top executives, from the summary compensation table in its proxy statement. Total pay includes salary, bonus, stock and option awards and other pay, as the company valued them.

YearExecutiveAgeSalaryTotal pay
2025Giel RuttenFormer President and Chief Executive Officer68$1.0M$12.1M83
2025Megan FaustExecutive Vice President and Chief Financial Officer52$630.0K$4.7M83
2025Kevin K. EngelPresident and Chief Executive Officer54$560.0K$3.6M83
2025Farshad HaghighiExecutive Vice President, Chief Sales Officer62$560.0K$2.6M83
2025Mark N. RogersExecutive Vice President, General Counsel, and Corporate Secretary60$560.0K$2.3M83
2024Giel RuttenFormer President and Chief Executive Officer68$1.0M$16.6M83
2024Megan FaustExecutive Vice President and Chief Financial Officer52$610.0K$4.0M83
2024Farshad HaghighiExecutive Vice President, Chief Sales Officer62$560.0K$2.3M83
2024Mark N. RogersExecutive Vice President, General Counsel, and Corporate Secretary60$560.0K$2.3M83
2024Kevin K. EngelPresident and Chief Executive Officer54$500.0K$2.0M83
2023Giel RuttenFormer President and Chief Executive Officer68$1.0M$12.8M83
2023Megan FaustExecutive Vice President and Chief Financial Officer52$600.0K$3.3M83
2023Farshad HaghighiExecutive Vice President, Chief Sales Officer62$550.0K$1.9M83
2023Mark N. RogersExecutive Vice President, General Counsel, and Corporate Secretary60$550.0K$1.9M83
2023Kevin K. EngelPresident and Chief Executive Officer54$450.0K$1.6M83

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
BlackRock, Inc.12,292,760$1.1B0.0%−676,005
Vanguard Portfolio Management LLC9,712,553$837.5M0.0%+616,705
Dimensional Fund Advisors LP8,064,191$695.3M0.1%−2,927,278
Vanguard Capital Management LLC6,701,080$577.8M0.0%+1,266,762
Jpmorgan Chase & Co5,702,608$470.0M0.0%+296,063
State Street Corp3,730,584$321.7M0.0%+102,042
Aqr Capital Management LLC3,231,546$273.8M0.1%−10,584
Earnest Partners LLC2,852,492$246.0M0.9%−579,351
Geode Capital Management, LLC2,798,149$241.3M0.0%+67,641
Invesco Ltd.2,485,794$214.4M0.0%+596,389
Point72 Asset Management, L.P.2,477,326$213.6M0.3%−516,108
Principal Financial Group Inc1,970,200$169.8M0.1%−652,544
First Trust Advisors LP1,836,306$158.3M0.1%+42,769
Charles Schwab Investment Management Inc1,832,535$158.0M0.0%−269,003
Fisher Asset Management, LLC1,821,547$157.1M0.0%−189,435
Morgan Stanley1,525,685$131.6M0.0%+152,877
Norges Bank1,477,233$127.4M0.0%New
Qube Research & Technologies Ltd1,161,478$100.2M0.1%+799,341
Two Sigma Investments, LP1,069,101$92.2M0.1%−144,793
American Century Companies Inc1,055,656$91.0M0.0%−1,657,604
Bank of New York Mellon Corp1,051,327$90.7M0.0%+67,340
Goldman Sachs Group Inc1,046,405$90.2M0.0%+189,478
Citadel Advisors LLC1,028,138$88.7M0.1%+832,297
Tcw Group Inc1,027,777$88.6M0.6%+971,057
Northern Trust Corp960,941$82.9M0.0%+17,098

13F reports cover disclosed long positions in U.S. stocks only.

Members of Congress who traded it

3 trades disclosed by members of Congress. “Vs S&P since” is the stock’s change since the trade minus the S&P 500’s.

DateMemberTradeAmountVs S&P sinceFiling
Feb 4, 2026Markwayne Mullin, SenateBuy$15,001 - $50,000−17.1%Report
Jan 5, 2026Markwayne Mullin, SenateBuy$15,001 - $50,000−25.3%Report
Jan 5, 2026Markwayne Mullin, SenateBuy$15,001 - $50,000−25.3%Report

Members report amounts as ranges, not exact figures. Returns are price-only (no dividends).

SEC filer profile

How Amkor Technology is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARAMKOR TECHNOLOGY, INC.2
  • CIK0001047127
  • Employer ID (EIN)23-172272417
  • Filer statusLarge accelerated filer not an emerging growth company; not a smaller reporting company; not a shell company17
  • Incorporated inDelaware17
  • Fiscal year endsDecember 312
  • Industry code (SIC)3674 Semiconductors & Related Devices2
  • SEC reviewing officeOffice of Manufacturing, Division of Corporation Finance2
  • Business address2045 East Innovation Circle, Tempe, AZ 852842
  • Phone480-821-50002
  • Shares outstanding247,872,518 as of Apr 21, 202615
  • Public float$2.4B as of Jun 30, 202517
  • AuditorPricewaterhouseCoopers LLP, Phoenix, Arizona PCAOB ID 238; it also attests to the company’s internal control over financial reporting17
  • On EDGAR sinceOct 6, 19972
  • Filings2,290 in all: 4 (1,228), 8-K (336), 5 (91), 3 (89), 10-Q (86), 144 (79), SC 13G/A (35), 424B3 (29)2
    All 58 form types

    DEF 14A (28), 10-K (24), 4/A (21), 8-K/A (19), ARS (18), SC 13D/A (18), SD (13), SC 13G (12), S-8 POS (11), UPLOAD (10), S-8 (9), 10-Q/A (8), S-4 (8), 10-K/A (6), 11-K (6), 3/A (6), CORRESP (6), S-4/A (6), SC TO-I/A (6), 10-K405/A (5), FWP (5), POS AM (5), S-1/A (5), 10-K405 (4), 424B5 (4), 424B7 (4), EFFECT (4), S-3 (4), S-3ASR (4), 424B1 (3), 424B4 (3), S-3/A (3), SC TO-I (3), SCHEDULE 13D/A (3), 424B2 (2), 8-A12G (2), DEFA14A (2), NT 10-Q (2), RW (2), S-1 (2), SCHEDULE 13G/A (2), 5/A (1), DEFS14A (1), NT 10-K (1), PRE 14A (1), PRES14A (1), PX14A6G (1), S-1MEF (1), SC 13D (1), SC TO-C (1)

  • Latest filingsAnnual report (10-K) Feb 20, 2026
    Quarterly report (10-Q) Jul 28, 2026
    Proxy statement (DEF 14A) Apr 2, 2026
    Latest 8-K (8-K) Jul 27, 2026

Securities registered for trading

ClassSymbolExchange
Common Stock, $0.001 par valueAMKRThe Nasdaq Global Select Market

From the cover page of the 10-K filed Feb 20, 2026 (Section 12(b) of the Exchange Act).17

Risk factors and legal proceedings

The risks Amkor Technology names in Item 1A of its 10-K filed Feb 20, 2026: 29 risks under these headings, as written.17

  • Risks Related to Our Business, Operations and Industry
  • Risks Related to Our International Sales and Operations
  • Risks Related to Cybersecurity, Data Privacy and Intellectual Property
  • Risks Related to Our Indebtedness
  • Risks Related to Our Common Stock
  • Risks Related to Human Capital and Management
  • Risks Related to Regulatory, Legal and Tax Challenges
  • General Risk Factors
  • Our packaging and test services are used in volatile industries, and industry downturns and declines in global economic and financial conditions could harm our performance.
  • Our business may suffer if the cost, quality or supply of materials or equipment changes adversely.
  • Our operating results and cash flows have varied and may vary significantly as a result of factors that we cannot control.
  • We compete against established competitors in the packaging and test business as well as internal capabilities of IDMs and face competition from foundries and contract manufacturers.
The other 25 risks
  • We make substantial investments in equipment and facilities to support the demand of our customers, which may materially and adversely affect our business if the demand of our customers does not develop as we expect or is adversely affected.
  • We may face warranty claims, product return and liability risks, economic damage claims and negative publicity if our packages fail.
  • Due to our high percentage of fixed costs, we may be unable to maintain satisfactory gross margins if we are unable to achieve relatively high-capacity utilization rates.
  • The lack of contractually committed customer demand may materially and adversely affect our sales.
  • Historically, there has been downward pressure on the prices of our packaging and test services.
  • Packaging and test processes are complex, and our production yields and customer relationships may suffer from defects in the services we provide or if we do not successfully implement new technologies.
  • A significant portion of our revenue is derived from customers in the automotive industry. A downturn or lower sales to customers in the automotive industry could materially affect our business and results of operations.
  • The loss of certain customers or reduced orders or pricing from existing customers may have a material adverse effect on our operations and financial results.
  • We may have difficulty funding liquidity needs.
  • We face challenges as we integrate diverse operations.
  • Our factories and operations, and those of our customers and vendors, are located in various foreign jurisdictions, which exposes us to risks arising from international trade restrictions and regional conflict.
  • Our business will suffer if we are not able to develop new proprietary technology, protect our proprietary technology and operate without infringing the proprietary rights of others.
  • We face risks in connection with the continuing development and implementation of changes to, and maintenance and security of, our information technology systems.
  • Covenants in the indentures and agreements governing our current and future indebtedness could restrict our operating flexibility.
  • Our substantial indebtedness could have a material adverse effect on our financial condition and prevent us from fulfilling our obligations.
  • If interest rates increase, our debt service obligations under our variable rate indebtedness would increase, which could have a material adverse effect on our results of operations.
  • We are exposed to fluctuations in interest rates and changes in credit risk, which could have a material adverse impact on our earnings as it relates to the market value of our investment portfolio.
  • Susan Y. Kim and members of her family can effectively determine or substantially influence the outcome of all matters requiring stockholder approval.
  • We may decrease or suspend our quarterly dividend, and any decrease in or suspension of the dividend could cause our stock price to decline.
  • We face risks trying to attract, retain or replace qualified employees to support our operations.
  • If we fail to maintain an effective system of internal controls, we may not be able to accurately report financial results or prevent fraud.
  • We could suffer adverse tax and other financial consequences if there are changes in tax laws or taxing authorities do not agree with our interpretation of applicable tax laws, including whether we continue to qualify for conditional reduced tax rates, or if we are required to establish or adjust valuation allowances on deferred tax assets.
  • Environmental, health and safety liabilities and expenditures could have a material adverse effect on our business, results of operation and financial condition.
  • The awards and incentives from the agreement with the U.S. Department of Commerce (the “Commerce Department”) pursuant to the U.S. CHIPS and Science Act of 2022 (“CHIPS Act”) might not materialize as such awards and incentives are conditional upon achieving or maintaining certain outcomes and compliance with other obligations, are subject to reduction, termination, or clawback and would impose certain restrictions on our business.
  • Our business and financial condition has been adversely affected, and could be adversely affected in the future, by natural disasters and other calamities, health conditions or pandemics, political instability, hostilities or other disruptions.

Legal proceedings

From time to time, we may become involved in various disputes and litigation matters that arise in the ordinary course of our business. These include disputes and lawsuits related to intellectual property, acquisitions, licensing, contracts, tax, regulatory compliance, employee relations and other matters. For a discussion of our material legal proceedings, see Note 17 to our Consolidated Financial Statements in Part II, Item 8 of this Form 10-K.

The opening of Item 3, Legal Proceedings.17

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