Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
155 institutional managers reported holding EC for the quarter ended Mar 31, 2026. Together they hold about 0% of shares outstanding; the top 10 hold 0%. 41 opened new positions; 20 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 3.04M | <0.01% | $45.6M | trimmed -2.8% | ≤2013 |
| BlackRock | 2.73M | <0.01% | $41.0M | added +78.7% | ≤2013 |
| Two Sigma | 1.85M | <0.01% | $27.8M | added +39.6% | 2024 Q4 |
| Charles Schwab Investment Management | 1.66M | <0.01% | $25.0M | added +18.2% | ≤2013 |
| Connor, Clark & Lunn Investment Management LTD. | 1.55M | <0.01% | $23.2M | opened | 2026 Q1 |
| D. E. Shaw | 1.27M | <0.01% | $19.0M | added +83.6% | 2024 Q4 |
| American Century Companies INC | 884.1k | <0.01% | $13.3M | added +51.6% | 2020 Q1 |
| Goldman Sachs | 881.9k | <0.01% | $13.2M | trimmed -5.7% | ≤2013 |
| Marshall Wace | 570.3k | <0.01% | $8.6M | added +265.8% | 2021 Q1 |
| Truffle Hound Capital, LLC (focused) | 550.0k | <0.01% | $8.3M | unchanged | 2025 Q1 |
| Morgan Stanley | 537.6k | <0.01% | $8.1M | trimmed -16.7% | ≤2013 |
| Jane Street | 511.4k | <0.01% | $7.7M | added +162.5% | 2021 Q1 |
| Aventail Capital Group, LP | 460.2k | <0.01% | $6.9M | opened | 2026 Q1 |
| Arrowstreet Capital | 436.5k | <0.01% | $6.6M | opened | 2026 Q1 |
| State Street | 361.6k | <0.01% | $5.4M | added +12% | ≤2013 |
| Millennium Management | 324.1k | <0.01% | $4.9M | trimmed -87.5% | 2018 Q3 |
| Fisher Investments | 323.5k | <0.01% | $4.9M | trimmed -27.3% | 2018 Q2 |
| XTX Topco LTD | 312.1k | <0.01% | $4.7M | added +144% | 2024 Q4 |
| Barclays PLC | 270.5k | <0.01% | $4.1M | added +173.5% | 2025 Q3 |
| CWA Asset Management Group, LLC | 248.4k | <0.01% | $3.7M | added +151.2% | 2025 Q4 |
| Renaissance Technologies | 239.0k | <0.01% | $3.6M | opened | 2026 Q1 |
| Engineers Gate Manager LP | 234.0k | <0.01% | $3.5M | added +88.3% | 2023 Q3 |
| UBS | 224.6k | <0.01% | $3.4M | trimmed -52.1% | ≤2013 |
| Voloridge Investment Management | 199.9k | <0.01% | $3.0M | trimmed -15.5% | 2025 Q3 |
| Banco BTG Pactual S.a. | 186.0k | <0.01% | $2.8M | opened | 2026 Q1 |
| Manning & Napier Advisors LLC | 185.2k | <0.01% | $2.8M | trimmed -0.8% | 2024 Q2 |
| Simplex Trading, LLC | 180.8k | <0.01% | $2.7M | opened | 2026 Q1 |
| LPL Financial LLC | 171.2k | <0.01% | $2.6M | added +42.9% | 2023 Q4 |
| BW Gestao de Investimentos Ltda. | 161.2k | <0.01% | $2.4M | opened | 2026 Q1 |
| Carrera Capital Advisors | 152.4k | <0.01% | $2.3M | opened | 2025 Q3 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 152.1k | <0.01% | $2.3M | added +91.5% | 2025 Q3 |
| Walleye Capital LLC | 148.1k | <0.01% | $2.2M | opened | 2026 Q1 |
| Brooklyn Investment Group | 144.0k | <0.01% | $2.2M | added +32.4% | 2024 Q4 |
| Legal & General Group PLC | 141.2k | <0.01% | $2.1M | unchanged | ≤2013 |
| Northern Trust | 139.9k | <0.01% | $2.1M | added +10% | ≤2013 |
| Group ONE Trading LLC | 131.1k | <0.01% | $2.0M | opened | 2026 Q1 |
| Public Employees Retirement System OF Ohio | 130.0k | <0.01% | $2.0M | opened | 2026 Q1 |
| SBI Securities CO., LTD. | 125.8k | <0.01% | $1.9M | trimmed -34.6% | 2024 Q4 |
| Citadel Advisors | 113.9k | <0.01% | $1.7M | trimmed -76.5% | 2018 Q2 |
| Barometer Capital Management INC. | 109.0k | <0.01% | $1.6M | added +2694.9% | 2025 Q1 |
| Pekin Hardy Strauss, INC. | 108.5k | <0.01% | $1.6M | trimmed -10.1% | 2025 Q1 |
| Sona Asset Management (US) LLC | 100.0k | <0.01% | $1.5M | unchanged | 2025 Q1 |
| Hantz Financial Services, INC. | 97.2k | <0.01% | $1.5M | added +5.5% | 2025 Q1 |
| Robeco Institutional Asset Management B.v. | 90.6k | <0.01% | $1.4M | trimmed -9.2% | 2024 Q4 |
| Squarepoint Ops LLC | 79.7k | <0.01% | $1.2M | added +96.4% | 2024 Q3 |
| Vident Advisory, LLC | 78.6k | <0.01% | $1.2M | added +66.3% | 2023 Q3 |
| Glenorchy Capital LTD | 72.7k | <0.01% | $1.1M | added +16.3% | 2023 Q4 |
| Jump Financial | 67.7k | <0.01% | $1.0M | trimmed -68.9% | 2024 Q3 |
| Kerrisdale Advisers, LLC | 67.6k | <0.01% | $1.0M | unchanged | 2023 Q1 |
| Allianz Asset Management GmbH | 65.8k | <0.01% | $987k | trimmed -75.1% | 2025 Q2 |
Largest 50 of 155 shown; the full ranked, searchable register is at boothcheck.com/holders/EC. 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.