Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
288 institutional managers reported holding CRK for the quarter ended Mar 31, 2026. Together they hold about 24% of shares outstanding; the top 10 hold 16%. 41 opened new positions; 55 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 11.67M | 4.00% | $246.2M | added +2.9% | ≤2013 |
| Dimensional Fund Advisors | 11.26M | 3.87% | $237.6M | trimmed -0.9% | 2020 Q3 |
| Vanguard Group | 8.71M | 2.99% | $183.8M | added +3.2% | ≤2013 |
| State Street | 5.20M | 1.78% | $109.6M | added +15.9% | 2018 Q4 |
| American Century Companies INC | 2.37M | 0.81% | $50.1M | added +7.2% | 2020 Q2 |
| Geode Capital | 1.84M | 0.63% | $38.9M | added +2.7% | ≤2013 |
| Morgan Stanley | 1.57M | 0.54% | $33.1M | trimmed -16.7% | ≤2013 |
| UBS | 1.38M | 0.47% | $29.0M | added +101.4% | ≤2013 |
| Point72 | 1.28M | 0.44% | $27.1M | added +916.2% | 2025 Q2 |
| Goldman Sachs | 1.20M | 0.41% | $25.3M | added +32.2% | ≤2013 |
| Charles Schwab Investment Management | 1.09M | 0.38% | $23.0M | added +3.3% | 2019 Q2 |
| First Trust Advisors LP | 1.08M | 0.37% | $22.8M | added +143.2% | 2020 Q3 |
| Goehring & Rozencwajg Associates, LLC (focused) | 861.9k | 0.30% | $18.2M | added +34.8% | 2023 Q2 |
| Gemsstock LTD. (focused) | 813.9k | 0.28% | $17.2M | trimmed -1.7% | 2025 Q4 |
| Northern Trust | 758.4k | 0.26% | $16.0M | added +3% | ≤2013 |
| Bank OF America CORP /DE/ | 726.1k | 0.25% | $15.3M | added +5.5% | 2017 Q3 |
| BNY Mellon | 558.5k | 0.19% | $11.8M | trimmed -1.5% | 2018 Q4 |
| Citadel Advisors | 547.9k | 0.19% | $11.6M | trimmed -21% | 2023 Q3 |
| BNP Paribas Financial Markets | 537.8k | 0.18% | $11.3M | added +2.7% | 2019 Q1 |
| Man Group | 527.5k | 0.18% | $11.1M | trimmed -38.7% | 2020 Q3 |
| Raymond James Financial INC | 498.6k | 0.17% | $10.5M | added +11% | 2022 Q1 |
| Marshall Wace | 496.8k | 0.17% | $10.5M | added +553.4% | 2022 Q1 |
| Cwm, LLC | 496.3k | 0.17% | $10.5M | added +10850.6% | 2019 Q1 |
| Victory Capital Management INC | 474.4k | 0.16% | $10.0M | trimmed -26.9% | 2019 Q3 |
| Invesco | 436.5k | 0.15% | $9.2M | trimmed -55% | ≤2013 |
| Royce & Associates | 433.7k | 0.15% | $9.2M | added +10.5% | 2024 Q2 |
| Stifel Financial CORP | 426.0k | 0.15% | $9.0M | added +1.1% | 2020 Q4 |
| VAN DEN Berg Management I, INC | 396.1k | 0.14% | $8.4M | trimmed -1.2% | 2020 Q4 |
| Wells Fargo & COMPANY/MN | 392.6k | 0.14% | $8.3M | added +21.2% | ≤2013 |
| Principal Financial Group INC | 385.9k | 0.13% | $8.1M | added +2.2% | 2021 Q2 |
| Dana Investment Advisors, INC. | 313.0k | 0.11% | $6.6M | unchanged | 2024 Q1 |
| Susquehanna International Group | 312.5k | 0.11% | $6.6M | added +690.5% | ≤2013 |
| Public Sector Pension Investment Board | 283.1k | 0.10% | $6.0M | added +3.3% | 2023 Q1 |
| LPL Financial LLC | 280.1k | 0.10% | $5.9M | trimmed -16.6% | 2021 Q1 |
| Corigliano Investment Advisers, LLC (focused) | 250.4k | 0.09% | $5.3M | added +439.6% | 2024 Q4 |
| Millennium Management | 240.3k | 0.08% | $5.1M | added +163.6% | 2024 Q2 |
| Aventail Capital Group, LP | 234.5k | 0.08% | $4.9M | trimmed -40.7% | 2024 Q4 |
| Federated Hermes, INC. | 217.4k | 0.07% | $4.6M | trimmed -54.6% | 2025 Q2 |
| Rhumbline Advisers | 215.1k | 0.07% | $4.5M | added +2.3% | 2019 Q2 |
| Great Hill Capital LLC (focused) | 213.7k | 0.07% | $4.5M | trimmed -8.5% | 2025 Q3 |
| Clarus Group, INC. | 213.3k | 0.07% | $4.5M | unchanged | 2020 Q4 |
| Aptus Capital Advisors, LLC | 212.9k | 0.07% | $4.5M | opened | 2026 Q1 |
| Nuveen | 195.7k | 0.07% | $4.1M | added +6.9% | 2019 Q2 |
| Rafferty Asset Management, LLC | 187.4k | 0.06% | $4.0M | added +30.7% | 2021 Q4 |
| Isthmus Partners, LLC | 186.2k | 0.06% | $3.9M | trimmed -2.6% | 2023 Q3 |
| Massar Capital Management, LP | 176.9k | 0.06% | $3.7M | opened | 2025 Q3 |
| Swiss National Bank | 173.4k | 0.06% | $3.7M | unchanged | 2021 Q2 |
| Legal & General Group PLC | 168.2k | 0.06% | $3.5M | trimmed -12.7% | 2019 Q2 |
| Fiduciary Alliance LLC | 160.7k | 0.06% | $3.4M | added +254.2% | 2025 Q2 |
| Royal Bank OF Canada | 151.9k | 0.05% | $3.2M | added +3.6% | 2019 Q3 |
Largest 50 of 288 shown; the full ranked, searchable register is at boothcheck.com/holders/CRK. 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.