Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
214 institutional managers reported holding DCO for the quarter ended Mar 31, 2026. Together they hold about 87% of shares outstanding; the top 10 hold 41%. 34 opened new positions; 25 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 1.77M | 11.34% | $215.8M | added +5.1% | ≤2013 |
| Vanguard Group | 851.3k | 5.46% | $103.8M | added +1.1% | ≤2013 |
| State Street | 785.5k | 5.04% | $95.8M | added +17.1% | ≤2013 |
| Paradigm Capital Management INC/NY | 770.5k | 4.94% | $94.0M | unchanged | ≤2013 |
| Dimensional Fund Advisors | 512.2k | 3.28% | $62.5M | trimmed -31.7% | ≤2013 |
| Gamco Investors, INC. et al | 449.5k | 2.88% | $54.8M | trimmed -13.1% | ≤2013 |
| Brown Advisory INC | 349.3k | 2.24% | $42.6M | trimmed -19.4% | 2025 Q2 |
| Geode Capital | 335.0k | 2.15% | $40.9M | unchanged | ≤2013 |
| Victory Capital Management INC | 330.1k | 2.12% | $40.3M | added +2337.4% | 2017 Q3 |
| Ophir Asset Management Pty LTD (focused) | 312.9k | 2.01% | $38.2M | trimmed -27.1% | 2025 Q2 |
| Gw&k Investment Management, LLC | 312.0k | 2.00% | $38.1M | trimmed -2.4% | 2023 Q4 |
| Deutsche Bank AG\ | 302.2k | 1.94% | $36.9M | added +34.1% | 2013 Q3 |
| VAN ECK Associates CORP | 254.0k | 1.63% | $31.0M | added +35.9% | 2022 Q2 |
| Loomis Sayles & CO L P | 252.5k | 1.62% | $30.8M | trimmed -7.7% | 2025 Q4 |
| Nuveen | 249.7k | 1.60% | $30.5M | added +333.4% | 2019 Q2 |
| American Century Companies INC | 225.8k | 1.45% | $27.5M | added +82.5% | 2023 Q1 |
| AllianceBernstein | 224.7k | 1.44% | $27.4M | trimmed -22.8% | 2022 Q4 |
| Ameriprise Financial INC | 217.5k | 1.39% | $26.5M | added +4512.3% | 2024 Q4 |
| Aberdeen Group plc | 204.3k | 1.31% | $24.9M | trimmed -6.5% | 2025 Q3 |
| Kennedy Capital Management LLC | 186.3k | 1.19% | $22.7M | trimmed -28.9% | 2021 Q2 |
| Charles Schwab Investment Management | 183.6k | 1.18% | $22.4M | trimmed -4% | ≤2013 |
| Goldman Sachs | 162.6k | 1.04% | $19.8M | added +72.3% | ≤2013 |
| FMR (Fidelity) | 155.4k | 1.00% | $18.9M | added +17.5% | 2021 Q2 |
| First Eagle Investment Management | 153.8k | 0.99% | $18.8M | trimmed -15.2% | 2021 Q2 |
| Invesco | 150.0k | 0.96% | $18.3M | added +12.4% | ≤2013 |
| Morgan Stanley | 134.4k | 0.86% | $16.4M | added +27.8% | ≤2013 |
| Thornburg Investment Management INC | 130.4k | 0.84% | $15.9M | trimmed -3.5% | 2025 Q3 |
| Meros Investment Management, LP | 128.2k | 0.82% | $15.6M | trimmed -26.5% | 2021 Q4 |
| WCM Investment Management | 121.8k | 0.78% | $14.9M | trimmed -3.9% | 2025 Q4 |
| Bragg Financial Advisors, INC | 121.0k | 0.78% | $14.8M | unchanged | ≤2013 |
| Northern Trust | 119.7k | 0.77% | $14.6M | added +4.5% | ≤2013 |
| Wells Fargo & COMPANY/MN | 113.6k | 0.73% | $13.9M | trimmed -8.3% | ≤2013 |
| Diamond Hill Capital Management INC | 110.6k | 0.71% | $13.5M | trimmed -22% | 2023 Q3 |
| Millennium Management | 108.6k | 0.70% | $13.2M | trimmed -7.1% | 2024 Q1 |
| Two Sigma | 101.2k | 0.65% | $12.3M | added +66.7% | 2021 Q2 |
| GAMCO (Gabelli) | 101.1k | 0.65% | $12.3M | trimmed -2.7% | ≤2013 |
| Oberweis Asset Management INC/ | 99.9k | 0.64% | $12.2M | added +1.8% | 2024 Q4 |
| Phocas Financial CORP. | 89.7k | 0.57% | $10.9M | trimmed -21.9% | 2023 Q1 |
| Mitsubishi UFJ Asset Management CO., LTD. | 86.3k | 0.55% | $10.5M | added +37.4% | 2023 Q2 |
| Royce & Associates | 84.6k | 0.54% | $10.3M | trimmed -16.7% | ≤2013 |
| UBS | 74.1k | 0.47% | $9.0M | added +30.5% | ≤2013 |
| Wellington Management | 69.8k | 0.45% | $8.5M | trimmed -32.8% | 2016 Q3 |
| Qube Research & Technologies LTD | 66.0k | 0.42% | $8.1M | trimmed -19.5% | 2023 Q4 |
| Gibson Capital, LLC | 62.2k | 0.40% | $7.6M | trimmed -11.4% | 2024 Q4 |
| SG Americas Securities, LLC | 60.3k | 0.39% | $7.4M | added +95.9% | 2024 Q3 |
| CSM Advisors, LLC | 54.8k | 0.35% | $6.7M | unchanged | 2025 Q2 |
| Teacher Retirement System OF Texas | 52.0k | 0.33% | $6.3M | trimmed -27.8% | 2024 Q4 |
| Bank OF America CORP /DE/ | 50.6k | 0.33% | $6.2M | added +18.5% | ≤2013 |
| J. Goldman & CO LP | 49.6k | 0.32% | $6.0M | opened | 2026 Q1 |
| Advisors Asset Management, INC. | 49.3k | 0.32% | $6.0M | added +42.6% | 2023 Q1 |
Largest 50 of 214 shown; the full ranked, searchable register is at boothcheck.com/holders/DCO. 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.