Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
510 institutional managers reported holding AMKR for the quarter ended Mar 31, 2026. Together they hold about 46% of shares outstanding; the top 10 hold 24%. 129 opened new positions; 64 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 15.48M | 6.20% | $697.1M | trimmed -1.6% | ≤2013 |
| BlackRock | 12.97M | 5.20% | $584.0M | unchanged | ≤2013 |
| Dimensional Fund Advisors | 10.99M | 4.40% | $494.9M | trimmed -13.9% | ≤2013 |
| State Street | 3.63M | 1.45% | $163.4M | added +4.5% | ≤2013 |
| Earnest Partners LLC | 3.43M | 1.38% | $154.5M | trimmed -9.5% | 2022 Q3 |
| AQR Capital | 3.24M | 1.30% | $146.0M | trimmed -1.8% | ≤2013 |
| Point72 | 2.99M | 1.20% | $134.8M | trimmed -2.3% | 2025 Q2 |
| Geode Capital | 2.73M | 1.09% | $123.0M | added +22.3% | ≤2013 |
| American Century Companies INC | 2.71M | 1.09% | $122.2M | trimmed -24.1% | 2019 Q2 |
| Principal Financial Group INC | 2.62M | 1.05% | $118.1M | added +19.3% | 2021 Q1 |
| Jane Street | 2.33M | 0.93% | $104.9M | added +3578.1% | 2020 Q3 |
| Charles Schwab Investment Management | 2.10M | 0.84% | $94.6M | unchanged | ≤2013 |
| Fisher Investments | 2.01M | 0.81% | $90.6M | trimmed -4% | 2022 Q4 |
| Invesco | 1.89M | 0.76% | $85.1M | added +69.4% | ≤2013 |
| First Trust Advisors LP | 1.79M | 0.72% | $80.8M | trimmed -34.1% | 2016 Q2 |
| Bridgewater Associates | 1.58M | 0.63% | $71.2M | added +1976.4% | 2025 Q4 |
| D. E. Shaw | 1.49M | 0.60% | $67.0M | added +861.8% | 2023 Q3 |
| UBS | 1.43M | 0.57% | $64.4M | trimmed -6.6% | ≤2013 |
| Allianz Asset Management GmbH | 1.38M | 0.56% | $62.3M | added +37.4% | 2019 Q4 |
| Morgan Stanley | 1.37M | 0.55% | $61.8M | trimmed -24% | ≤2013 |
| LSV Asset Management | 1.31M | 0.53% | $59.0M | trimmed -53.5% | ≤2013 |
| Two Sigma | 1.21M | 0.49% | $54.7M | added +119.6% | 2025 Q1 |
| Gotham Asset Management | 1.07M | 0.43% | $48.3M | trimmed -10% | 2018 Q1 |
| Trexquant Investment LP | 1.07M | 0.43% | $48.0M | opened | 2023 Q3 |
| Voloridge Investment Management | 1.06M | 0.42% | $47.8M | opened | 2026 Q1 |
| BNY Mellon | 984.0k | 0.39% | $44.3M | added +1.8% | ≤2013 |
| SG Americas Securities, LLC | 978.6k | 0.39% | $44.1M | added +39.8% | 2018 Q2 |
| Squarepoint Ops LLC | 966.8k | 0.39% | $43.5M | opened | 2022 Q1 |
| Northern Trust | 943.8k | 0.38% | $42.5M | added +5.5% | ≤2013 |
| SW Investment Management LLC (focused) | 900.0k | 0.36% | $40.5M | trimmed -35.7% | 2021 Q1 |
| Goldman Sachs | 856.9k | 0.34% | $38.6M | added +69.2% | ≤2013 |
| LPL Financial LLC | 848.2k | 0.34% | $38.2M | added +1106.9% | 2020 Q4 |
| Burkehill Global Management, LP | 800.0k | 0.32% | $36.0M | opened | 2026 Q1 |
| Millennium Management | 773.2k | 0.31% | $34.8M | added +227.4% | 2018 Q4 |
| T. Rowe Price | 746.4k | 0.30% | $33.6M | added +469.9% | ≤2013 |
| Envestnet Asset Management INC | 741.1k | 0.30% | $33.4M | added +2.9% | 2020 Q4 |
| Bandera Partners LLC (focused) | 693.5k | 0.28% | $31.2M | unchanged | 2021 Q1 |
| Nuveen | 678.2k | 0.27% | $30.5M | trimmed -3.5% | 2019 Q2 |
| Raymond James Financial INC | 516.9k | 0.21% | $23.3M | added +59.4% | 2024 Q3 |
| HRT Financial LP | 499.6k | 0.20% | $22.5M | added +60.7% | 2025 Q1 |
| Wells Fargo & COMPANY/MN | 478.5k | 0.19% | $21.5M | trimmed -1.5% | ≤2013 |
| Man Group | 469.3k | 0.19% | $21.1M | added +1367.4% | 2025 Q4 |
| Lord, Abbett & CO. LLC | 455.9k | 0.18% | $20.5M | opened | 2026 Q1 |
| Light Street Capital Management, LLC (focused) | 407.0k | 0.16% | $18.3M | added +41.4% | 2025 Q4 |
| Baird Financial Group, INC. | 403.8k | 0.16% | $18.2M | added +4.7% | 2021 Q1 |
| SEI Investments CO | 401.8k | 0.16% | $18.1M | added +33.8% | 2017 Q3 |
| Russell Investments Group, LTD. | 400.1k | 0.16% | $18.0M | added +204.4% | 2016 Q4 |
| Acadian Asset Management | 394.3k | 0.16% | $17.8M | added +107.4% | 2025 Q1 |
| MFS Investment Management | 366.8k | 0.15% | $16.5M | trimmed -4.1% | 2016 Q4 |
| Qube Research & Technologies LTD | 362.1k | 0.14% | $16.3M | added +968.8% | 2025 Q4 |
Largest 50 of 510 shown; the full ranked, searchable register is at boothcheck.com/holders/AMKR. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.