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AMKR · NASDAQ · Semiconductors

Amkor Technology (AMKR)

Packages and tests semiconductors for mobile, AI infrastructure, automotive and consumer devices.

$54.28
vs last close+2.09 (+4.00%)

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13F · 13D/G · Form 4

Institutions≈ 46.10%114.52M shares
686 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail
Insiders38.81%96.44M shares
20 holders · as of Sep 10, 2026
Strategic holders1.03%2.57M shares
3 holders · as of Nov 24, 2025
Other≈ 14.06%34.92M shares
remainder

248.45M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

13F · 13D/G · Form 4

HolderStakeSharesDate
John T. Kim1,2Insider10 percent owner, other: Member of 10% owner group (6)
30.32%75.34Mfiled May 5, 2026
BlackRock, Inc.Institution
4.95%12.29Mas of Jun 30, 2026
Agnes C. KimInsiderother: Member of 10% owner group (4)
4.50%11.19Mfiled Jul 22, 2026
Vanguard Portfolio Management LLCInstitution
3.91%9.71Mas of Jun 30, 2026
Dimensional Fund Advisors LPInstitution
3.25%8.06Mas of Jun 30, 2026
Vanguard Capital Management LLCInstitution
2.70%6.70Mas of Jun 30, 2026
Susan Y. Kim3Insiderdirector, 10 percent owner, other: Member of 10% owner group (5)
2.46%6.12Mfiled Jun 12, 2026
JPMorgan Chase & CoInstitution
2.30%5.70Mas of Jun 30, 2026
State Street CorpInstitution
1.50%3.73Mas of Jun 30, 2026
AQR Capital Management LLCInstitution
1.30%3.23Mas of Jun 30, 2026
Earnest Partners LLCInstitution
1.15%2.85Mas of Jun 30, 2026
Geode Capital Management, LLCInstitution
1.13%2.80Mas of Jun 30, 2026
Invesco Ltd.Institution
1.00%2.49Mas of Jun 30, 2026
Point72 Asset Management, L.P.Institution
1.00%2.48Mas of Jun 30, 2026
Principal Financial Group IncInstitution
0.79%1.97Mas of Jun 30, 2026
First Trust Advisors LPInstitution
0.74%1.84Mas of Jun 30, 2026
Charles Schwab Investment Management IncInstitution
0.74%1.83Mas of Jun 30, 2026
Sixth Street Partners Management Company, L.P.Institution
0.74%1.83Mas of Jun 30, 2026
Fisher Asset Management, LLCInstitution
0.73%1.82Mas of Jun 30, 2026
Clal Insurance Enterprises Holdings LtdInstitution
0.71%1.76Mas of Jun 30, 2026
Price T Rowe Associates Inc /MD/Institution
0.67%1.66Mas of Jun 30, 2026
Morgan StanleyInstitution
0.61%1.53Mas of Jun 30, 2026
Norges BankInstitution
0.59%1.48Mas of Jun 30, 2026
James J. KimInsider10 percent owner, other: Member of 10% owner group (5)
0.50%1.24Mfiled Jul 22, 2026
2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024Strategicother: Member of 10% owner group (2)
0.50%1.24Mfiled Nov 24, 2025
  1. John T. Kim's transaction reports restate only vehicles that traded; the 2026 ownership statement (75.34M) is used instead.
  2. John T. Kim reports a block also reported by JPMorgan Chase & Co; it is counted once, under JPMorgan Chase & Co.
  3. Susan Y. Kim reports a block also reported by John T. Kim; it is counted once, under John T. Kim.

13F, as of Jun 30, 2026

686 holders · 114.52M shares · 177 new positions · 396 increased · 197 reduced · 58 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.12.29M4.95%−676.0KAug 7, 2026
Vanguard Portfolio Management LLC9.71M3.91%+616.7KAug 13, 2026
Dimensional Fund Advisors LP8.06M3.25%−2.93MAug 11, 2026
Vanguard Capital Management LLC6.70M2.70%+1.27MAug 13, 2026
JPMorgan Chase & Co5.70M2.30%+296.1KAug 12, 2026
State Street Corp3.73M1.50%+102.0KAug 7, 2026
AQR Capital Management LLC3.23M1.30%−10.6KAug 14, 2026
Earnest Partners LLC2.85M1.15%−579.4KAug 13, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
John T. Kimincl. Susins, LLC, James J. Kim +41 more30.40%75.34M13DMay 5, 2026

Form 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Sep 8, 2026
Megan Faustofficer: CFO
Sale1,000$49.05134,105
Aug 17, 2026
Mark N. Rogersofficer: EVP & General Counsel
Sale5,000$59.7838,904
Aug 11, 2026
Megan Faustofficer: CFO
Sale1,000$54.45135,105
Aug 7, 2026
Douglas A. Alexanderdirector
Sale5,000$55.8129,109
Aug 6, 2026
Guillaume Marie Jean Ruttendirector
Sale25,000$54.50461,732
Aug 5, 2026
Guillaume Marie Jean Ruttendirector
Sale25,000$55.35486,732
Jul 30, 2026
Kevin K. Engeldirector, officer: President and CEO
Sale3,221$47.009,666
Jul 16, 2026
Mark N. Rogersofficer: EVP & General Counsel
Sale5,000$65.1238,904
Jul 14, 2026
Megan Faustofficer: CFO
Sale1,000$69.91136,105
Jun 16, 2026
Mark N. Rogersofficer: EVP & General Counsel
Sale5,000$86.2138,904

House and Senate disclosures

MemberTypeAmountOwnerTradedDisclosed
Sen. Markwayne Mullin · OKPurchase$15,001 – $50,000JointFeb 4, 2026Mar 2, 2026
Sen. Markwayne Mullin · OKPurchase$15,001 – $50,000SelfJan 5, 2026Feb 4, 2026
Sen. Markwayne Mullin · OKPurchase$15,001 – $50,000SelfJan 5, 2026Feb 3, 2026