Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
251 institutional managers reported holding CECO for the quarter ended Mar 31, 2026. Together they hold about 88% of shares outstanding; the top 10 hold 42%. 54 opened new positions; 30 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 2.33M | 6.53% | $138.7M | added +5.3% | 2022 Q1 |
| BlackRock | 2.29M | 6.40% | $136.1M | unchanged | ≤2013 |
| T. Rowe Price Investment Management, INC. | 2.13M | 5.97% | $127.0M | added +8541.8% | 2025 Q3 |
| American Century Companies INC | 1.89M | 5.31% | $112.8M | trimmed -7.1% | 2017 Q1 |
| Vanguard Group | 1.82M | 5.11% | $108.5M | added +2.3% | ≤2013 |
| Capital Group (American Funds) | 1.06M | 2.96% | $62.8M | added +216.7% | 2025 Q4 |
| Two Sigma | 959.7k | 2.69% | $57.2M | added +82.6% | 2020 Q3 |
| Dimensional Fund Advisors | 903.3k | 2.53% | $53.8M | added +0.9% | ≤2013 |
| Janus Henderson | 894.8k | 2.51% | $53.3M | trimmed -3% | 2023 Q4 |
| Geode Capital | 856.1k | 2.40% | $51.0M | added +17.3% | ≤2013 |
| Royce & Associates | 827.8k | 2.32% | $49.3M | added +11.8% | 2023 Q1 |
| King Luther Capital Management CORP | 750.1k | 2.10% | $44.7M | trimmed -21.1% | 2014 Q4 |
| State Street | 657.3k | 1.84% | $39.2M | added +1% | ≤2013 |
| Thrivent Financial for Lutherans | 640.0k | 1.79% | $38.1M | trimmed -4.8% | 2024 Q2 |
| Driehaus Capital Management LLC | 639.9k | 1.79% | $38.1M | added +10.3% | 2023 Q4 |
| IES Holdings, INC. (focused) | 568.5k | 1.59% | $33.9M | added +100.6% | 2025 Q4 |
| Emerald Advisers, LLC | 523.0k | 1.47% | $31.2M | added +14.1% | 2025 Q3 |
| Lord, Abbett & CO. LLC | 414.4k | 1.16% | $24.7M | added +104.9% | 2025 Q3 |
| Legal & General Group PLC | 400.5k | 1.12% | $23.9M | trimmed -4.3% | 2023 Q1 |
| Needham Investment Management LLC | 387.5k | 1.09% | $23.1M | added +29.8% | 2025 Q3 |
| Morgan Stanley | 350.7k | 0.98% | $20.9M | added +19.3% | ≤2013 |
| Emerald Mutual Fund Advisers Trust | 314.0k | 0.88% | $18.7M | added +20.5% | 2025 Q3 |
| UBS | 261.4k | 0.73% | $15.6M | trimmed -21.4% | ≤2013 |
| Rockefeller Capital Management L.p. | 254.3k | 0.71% | $15.1M | opened | 2026 Q1 |
| Marshall Wace | 251.9k | 0.71% | $15.0M | added +3129.5% | 2025 Q3 |
| Northern Trust | 251.9k | 0.71% | $15.0M | added +2.7% | ≤2013 |
| Martin & CO INC /TN/ | 249.5k | 0.70% | $14.9M | added +2.5% | 2013 Q3 |
| Charles Schwab Investment Management | 247.5k | 0.69% | $14.7M | trimmed -2.5% | ≤2013 |
| First Eagle Investment Management | 242.5k | 0.68% | $14.4M | trimmed -33.9% | 2023 Q3 |
| Farallon Capital | 234.0k | 0.66% | $13.9M | opened | 2026 Q1 |
| Loomis Sayles & CO L P | 229.0k | 0.64% | $13.6M | trimmed -30.1% | 2023 Q3 |
| Deutsche Bank AG\ | 227.8k | 0.64% | $13.6M | added +1.3% | 2023 Q2 |
| Osterweis Capital Management INC | 226.6k | 0.64% | $13.5M | added +1.3% | 2025 Q2 |
| Citadel Advisors | 217.4k | 0.61% | $12.9M | added +234.1% | 2021 Q1 |
| Bessemer Group INC | 216.5k | 0.61% | $12.9M | added +108147% | 2025 Q4 |
| Robeco Institutional Asset Management B.v. | 198.7k | 0.56% | $11.8M | added +51.5% | 2024 Q1 |
| BNP Paribas Financial Markets | 192.1k | 0.54% | $11.4M | added +8.3% | ≤2013 |
| Divisadero Street Capital Management, LP | 187.6k | 0.53% | $11.2M | opened | 2025 Q3 |
| Amundi | 168.2k | 0.47% | $10.0M | trimmed -5% | 2024 Q2 |
| Squarepoint Ops LLC | 165.3k | 0.46% | $9.8M | added +124.7% | 2024 Q4 |
| Point72 | 159.1k | 0.45% | $9.5M | opened | 2026 Q1 |
| Essex Investment Management CO LLC | 157.2k | 0.44% | $9.4M | added +1.8% | 2018 Q4 |
| First Trust Advisors LP | 156.6k | 0.44% | $9.3M | added +2.3% | 2025 Q4 |
| Peregrine Capital Management LLC | 154.3k | 0.43% | $9.2M | trimmed -15.6% | 2024 Q4 |
| Pier Capital, LLC | 150.2k | 0.42% | $8.9M | added +53.6% | 2025 Q2 |
| Kennedy Capital Management LLC | 149.8k | 0.42% | $8.9M | added +1.9% | 2019 Q3 |
| Franklin Resources | 147.5k | 0.41% | $8.8M | trimmed -41.8% | 2025 Q1 |
| Allspring Global Investments Holdings, LLC | 146.7k | 0.41% | $8.7M | trimmed -24.5% | 2023 Q3 |
| Polen Capital | 143.2k | 0.40% | $8.5M | added +105.3% | 2025 Q2 |
| Oberweis Asset Management INC/ | 135.0k | 0.38% | $8.0M | trimmed -7.2% | 2025 Q3 |
Largest 50 of 251 shown; the full ranked, searchable register is at boothcheck.com/holders/CECO. 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.