Ex-dividend in 4d · $0.0835
Amkor Technology
Packages and tests semiconductors for mobile, AI infrastructure, automotive and consumer devices.
$48.10
After-hours close+0.22 (+0.46%)
At close$47.88(−7.46%)
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Breakdown13F · Form 4
Institutions 52.71%130.95M sharesInsiders 3.44%8.54M sharesOther 43.85%108.96M shares
Shares outstanding 248.45M · Float 108.73M · 43.8% free float
Institutions13F, as of Jun 30, 2026
685 holders · 130.95M shares · 178 new positions · 395 increased · 195 reduced · 59 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 12.29M | 4.95% | −676.0K | Aug 7, 2026 |
| Vanguard Portfolio Management LLC | 9.71M | 3.91% | +616.7K | Aug 13, 2026 |
| Dimensional Fund Advisors LP | 8.06M | 3.25% | −2.93M | Aug 11, 2026 |
| Vanguard Capital Management LLC | 6.70M | 2.70% | +1.27M | Aug 13, 2026 |
| JPMorgan Chase & Co | 5.70M | 2.30% | +296.1K | Aug 12, 2026 |
| State Street Corp | 3.73M | 1.50% | +102.0K | Aug 7, 2026 |
| AQR Capital Management LLC | 3.23M | 1.30% | −10.6K | Aug 14, 2026 |
| Earnest Partners LLC | 2.85M | 1.15% | −579.4K | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| John T. Kimincl. Susins, LLC, James J. Kim +41 more | 30.40% | 75.34M | 13D | May 5, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Kim John T | 10 percent owner, other: Member of 10% owner group (6) | 35.15M | 14.15% | Feb 17, 2026 |
| 915 Investments, LP | other: Member of 10% owner group (2) | 29.59M | 11.91% | Feb 17, 2026 |
| Kim Agnes C | other: Member of 10% owner group (4) | 10.94M | 4.40% | Jul 22, 2026 |
| Susan Y. Kim | director, 10 percent owner, other: Member of 10% owner group (5) | 7.24M | 2.92% | Jun 12, 2026 |
| Kim David D | other: Member of 10% owner group (5) | 3.79M | 1.53% | Aug 5, 2025 |
| SUJODA Investments, LP | other: Member of 10% owner group (2) | 3.79M | 1.53% | Aug 5, 2025 |
| 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 | other: Member of 10% owner group (2) | 1.24M | 0.50% | Nov 24, 2025 |
| John T. Kim 2024 GRAT #1 dtd. 08/09/2024 | other: Member of 10% owner group | 1.19M | 0.48% | Nov 6, 2025 |
| 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024 | other: Member of 10% owner group (2) | 1.12M | 0.45% | Nov 24, 2025 |
| Kim James J | 10 percent owner, other: Member of 10% owner group (5) | 986.6K | 0.40% | Jul 22, 2026 |
36 ten-percent owners hold 190.52M shares by Form 4 — the 13D/G table above shows those stakes, the figure above counts officers and directors only · 25 people have not refiled in the last 18 months (3.23M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 17, 2026 | Mark N. Rogersofficer: EVP & General Counsel | Sale | 5,000 | $59.78 | 38,904 |
| Aug 11, 2026 | Megan Faustofficer: CFO | Sale | 1,000 | $54.45 | 135,105 |
| Aug 7, 2026 | Douglas A. Alexanderdirector | Sale | 5,000 | $55.81 | 29,109 |
| Aug 6, 2026 | Guillaume Marie Jean Ruttendirector | Sale | 25,000 | $54.50 | 461,732 |
| Aug 5, 2026 | Guillaume Marie Jean Ruttendirector | Sale | 25,000 | $55.35 | 486,732 |
| Jul 30, 2026 | Kevin K. Engeldirector, officer: President and CEO | Sale | 3,221 | $47.00 | 9,666 |
| Jul 16, 2026 | Mark N. Rogersofficer: EVP & General Counsel | Sale | 5,000 | $65.12 | 38,904 |
| Jul 14, 2026 | Megan Faustofficer: CFO | Sale | 1,000 | $69.91 | 136,105 |
| Jun 16, 2026 | Mark N. Rogersofficer: EVP & General Counsel | Sale | 5,000 | $86.21 | 38,904 |
| Jun 12, 2026 | Winston J. Churchilldirector | Sale | 5,000 | $78.20 | 28,781 |
CongressHouse and Senate disclosures
| Member | Type | Amount | Owner | Traded | Disclosed |
|---|---|---|---|---|---|
| Sen. Markwayne Mullin · OK | Purchase | $15,001 – $50,000 | Joint | Feb 4, 2026 | Mar 2, 2026 ↗ |
| Sen. Markwayne Mullin · OK | Purchase | $15,001 – $50,000 | Self | Jan 5, 2026 | Feb 4, 2026 ↗ |
| Sen. Markwayne Mullin · OK | Purchase | $15,001 – $50,000 | Self | Jan 5, 2026 | Feb 3, 2026 ↗ |