Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in CECO held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 2.3M | $138.8M | +5.3% | 6.492% | 0.01% |
| 2 | BlackRock, Inc. | 2.3M | $136.2M | 0.0% | 6.370% | 0.00% |
| 3 | AMERICAN CENTURY COMPANIES INC | 1.9M | $112.9M | -7.1% | 5.280% | 0.06% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | $79.4M | — | 3.714% | 0.00% |
| 5 | Capital World Investors | 1.1M | $62.9M | +216.8% | 2.941% | 0.01% |
| 6 | TWO SIGMA INVESTMENTS, LP | 960K | $57.2M | +82.6% | 2.675% | 0.05% |
| 7 | DIMENSIONAL FUND ADVISORS LP | 903K | $53.8M | +0.9% | 2.518% | 0.01% |
| 8 | JANUS HENDERSON GROUP PLC | 895K | $53.3M | -2.9% | 2.494% | 0.03% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 856K | $51.0M | +17.3% | 2.387% | 0.00% |
| 10 | ROYCE & ASSOCIATES LP | 828K | $49.3M | +11.8% | 2.307% | 0.49% |
| 11 | KING LUTHER CAPITAL MANAGEMENT CORP | 750K | $44.7M | -21.1% | 2.091% | 0.19% |
| 12 | STATE STREET CORP | 657K | $39.2M | +1.0% | 1.832% | 0.00% |
| 13 | DRIEHAUS CAPITAL MANAGEMENT LLC | 640K | $38.1M | +10.3% | 1.784% | 0.28% |
| 14 | IES Holdings, Inc. | 569K | $33.9M | +100.6% | 1.585% | 15.83% |
| 15 | EMERALD ADVISERS, LLC | 523K | $31.2M | +14.1% | 1.458% | 0.99% |
| 16 | Legal & General Group Plc | 400K | $23.9M | -4.3% | 1.116% | 0.01% |
| 17 | NEEDHAM INVESTMENT MANAGEMENT LLC | 388K | $23.1M | +29.8% | 1.080% | 1.18% |
| 18 | MORGAN STANLEY | 351K | $20.9M | +19.3% | 0.978% | 0.00% |
| 19 | EMERALD MUTUAL FUND ADVISERS TRUST | 314K | $18.7M | +20.5% | 0.875% | 0.91% |
| 20 | Rockefeller Capital Management L.P. | 254K | $15.2M | — | 0.709% | 0.03% |
| 21 | MARSHALL WACE, LLP | 252K | $15.0M | +3129.5% | 0.702% | 0.02% |
| 22 | NORTHERN TRUST CORP | 252K | $15.0M | +2.7% | 0.702% | 0.00% |
| 23 | MARTIN & CO INC /TN/ | 249K | $14.9M | +2.5% | 0.695% | 2.53% |
| 24 | CITADEL ADVISORS LLC | 248K | $14.8M | +252.0% | 0.692% | 0.01% |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 247K | $14.7M | -2.5% | 0.690% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in CECO — a direct measure of their conviction.
Filings activity in CECO during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 258 | +13% | 47.61% | 0.18 pp | $1.65B | 0.4% |
| Q4 2025 | 228 | +3.2% | 47.79% | +7.23 pp | $1.66B | +18% |
| Q3 2025 | 221 | +23% | 40.56% | +17.54 pp | $1.41B | +76% |
| Q2 2025 | 179 | +5.3% | 23.02% | +4.86 pp | $799M | +27% |
| Q1 2025 | 170 | 2.3% | 18.16% | 5.30 pp | $630M | 23% |
| Q4 2024 | 174 | +0.6% | 23.46% | +3.06 pp | $814M | +15% |
| Q3 2024 | 173 | 1.1% | 20.40% | +0.18 pp | $708M | +0.9% |
| Q2 2024 | 175 | — | 20.22% | — | $702M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying CECO stock.
Based on Q1 2026 13F filings, institutional ownership of CECO Environmental Corp. stands at 47.6%, held across 258 reporting institutions.
FMR LLC is the largest reported institutional holder of CECO, with approximately 2,328,888 shares worth $0.14B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of CECO, including TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for CECO is 64 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
61 institutions opened new positions in CECO during Q1 2026, while 31 fully exited. 93 added to existing positions and 101 trimmed.
CECO institutional ownership fell by 0.18 percentage points quarter-over-quarter, with a net change of +30 holders.
The top 10 institutions account for 48.1% of all reported 13F value in CECO, and the top 25 account for 70.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
CECO Environmental Corp. (CECO) Institutional Ownership