Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
166 institutional managers reported holding PKX for the quarter ended Mar 31, 2026. Together they hold about 13% of shares outstanding; the top 10 hold 9%. 33 opened new positions; 16 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 1.90M | 2.51% | $111.1M | added +47.6% | ≤2013 |
| Morgan Stanley | 1.15M | 1.52% | $67.0M | added +29.3% | ≤2013 |
| Dimensional Fund Advisors | 977.1k | 1.29% | $57.0M | unchanged | ≤2013 |
| State Street | 884.9k | 1.17% | $51.6M | added +4.1% | ≤2013 |
| American Century Companies INC | 677.6k | 0.89% | $39.5M | added +9% | 2019 Q4 |
| Vanguard Group | 372.6k | 0.49% | $21.7M | added +10.4% | ≤2013 |
| Creative Planning | 338.7k | 0.45% | $19.8M | added +59.3% | 2022 Q1 |
| Northern Trust | 292.9k | 0.39% | $17.1M | trimmed -5.6% | ≤2013 |
| BNP Paribas Financial Markets | 250.9k | 0.33% | $14.6M | unchanged | 2014 Q4 |
| Quantinno Capital Management LP | 200.5k | 0.27% | $11.7M | added +82.7% | 2022 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 158.3k | 0.21% | $9.2M | trimmed -27.2% | 2021 Q1 |
| Goldman Sachs | 156.8k | 0.21% | $9.1M | added +23.8% | ≤2013 |
| VAN ECK Associates CORP | 134.6k | 0.18% | $7.9M | trimmed -8.5% | ≤2013 |
| Barclays PLC | 110.3k | 0.15% | $6.4M | added +4692.8% | 2025 Q2 |
| Bank OF America CORP /DE/ | 109.1k | 0.14% | $6.4M | added +96.2% | ≤2013 |
| Vident Advisory, LLC | 92.2k | 0.12% | $5.4M | added +29.9% | 2022 Q2 |
| UBS | 91.7k | 0.12% | $5.3M | trimmed -54.3% | ≤2013 |
| NLB Skladi, upravljanje premozenja, d.o.o. | 90.4k | 0.12% | $5.3M | added +3.5% | 2025 Q4 |
| Quadrant Capital Group LLC | 82.6k | 0.11% | $4.8M | added +22% | 2015 Q2 |
| Stifel Financial CORP | 74.9k | 0.10% | $4.4M | added +13.7% | 2020 Q3 |
| Ramirez Asset Management, INC. | 65.7k | 0.09% | $3.8M | added +11.3% | 2025 Q4 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 52.4k | 0.07% | $3.1M | unchanged | 2021 Q4 |
| Laird Norton Wetherby Trust Company, LLC | 48.3k | 0.06% | $2.8M | added +56% | ≤2013 |
| FMR (Fidelity) | 47.2k | 0.06% | $2.8M | added +2.2% | 2018 Q3 |
| Rhumbline Advisers | 46.7k | 0.06% | $2.7M | added +36.1% | 2023 Q2 |
| Cibc World Market INC. | 45.0k | 0.06% | $2.6M | trimmed -1% | ≤2013 |
| Corient Private Wealth LLC | 40.1k | 0.05% | $2.3M | added +33.1% | 2022 Q4 |
| Bank OF Montreal /CAN/ | 38.4k | 0.05% | $2.2M | added +4% | 2015 Q1 |
| Greenline Partners, LLC | 37.8k | 0.05% | $2.2M | trimmed -12.9% | 2019 Q3 |
| Frank, Rimerman Advisors LLC | 37.6k | 0.05% | $2.2M | added +68.7% | 2025 Q2 |
| Sequoia Financial Advisors, LLC | 37.6k | 0.05% | $2.2M | added +58.3% | 2021 Q4 |
| O'shaughnessy Asset Management, LLC | 37.4k | 0.05% | $2.2M | added +5.9% | 2016 Q1 |
| DekaBank Deutsche Girozentrale | 36.0k | 0.05% | $2.1M | unchanged | 2020 Q3 |
| Cerity Partners LLC | 34.2k | 0.04% | $2.0M | added +50.7% | 2021 Q4 |
| US Bancorp \DE\ | 33.3k | 0.04% | $1.9M | added +48% | ≤2013 |
| D. E. Shaw | 31.5k | 0.04% | $1.8M | added +138.4% | 2023 Q3 |
| Point72 | 31.5k | 0.04% | $1.8M | trimmed -54% | 2025 Q3 |
| Yousif Capital Management, LLC | 29.1k | 0.04% | $1.7M | added +1.4% | 2021 Q4 |
| IEQ Capital, LLC | 28.4k | 0.04% | $1.7M | added +34.5% | 2025 Q2 |
| Mariner, LLC | 26.9k | 0.04% | $1.6M | added +39.1% | 2022 Q3 |
| Signaturefd, LLC | 26.4k | 0.04% | $1.5M | added +28.6% | 2017 Q4 |
| Recurrent Investment Advisors LLC | 25.0k | 0.03% | $1.5M | unchanged | 2019 Q4 |
| Barometer Capital Management INC. | 23.8k | 0.03% | $1.4M | opened | 2026 Q1 |
| PNC Financial Services Group, INC. | 22.7k | 0.03% | $1.3M | added +20.4% | ≤2013 |
| Oversea-chinese Banking CORP LTD | 22.3k | 0.03% | $1.3M | trimmed -52.8% | 2022 Q4 |
| Engineers Gate Manager LP | 20.2k | 0.03% | $1.2M | added +7.2% | 2024 Q1 |
| Ballentine Partners, LLC | 18.3k | 0.02% | $1.1M | added +70.7% | 2023 Q2 |
| Guggenheim Capital LLC | 18.1k | 0.02% | $1.1M | added +93.5% | 2022 Q4 |
| XTX Topco LTD | 17.9k | 0.02% | $1.0M | added +100.1% | 2025 Q2 |
| Clearbridge Investments, LLC | 17.4k | 0.02% | $1.0M | added +2.3% | 2014 Q3 |
Largest 50 of 166 shown; the full ranked, searchable register is at boothcheck.com/holders/PKX. 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.