CECO CECO Environmental Corp.
CECO Environmental Corp. (CECO) Institutional Ownership
What the institutions did with CECO last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | 1.6M | 17.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.5M | 16.6% |
| Thrivent Financial for Lutherans | 902.7K | 10.1% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 717.1K | 8.0% |
| SG Capital Management LLC | 500.1K | 5.6% |
| Swedbank AB | 443.0K | 5.0% |
| NEW SOUTH CAPITAL MANAGEMENT INC | 306.4K | 3.4% |
| DEUTSCHE BANK AG\ | 295.0K | 3.3% |
| Penn Capital Management Company, LLC | 245.0K | 2.7% |
| Bank of New York Mellon Corp | 227.5K | 2.5% |
| Russell Investments Group, Ltd. | 204.7K | 2.3% |
| Amundi | 196.4K | 2.2% |
| Robeco Schweiz AG | 164.8K | 1.8% |
| Allspring Global Investments Holdings, LLC | 151.4K | 1.7% |
| AGF MANAGEMENT LTD | 147.3K | 1.6% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 145.7K | 1.6% |
| Assenagon Asset Management S.A. | 140.4K | 1.6% |
| BARCLAYS PLC | 114.7K | 1.3% |
| CITIGROUP INC | 92.0K | 1.0% |
| MARATHON CAPITAL MANAGEMENT | 91.8K | 1.0% |
| GREAT LAKES ADVISORS, LLC | 62.6K | 0.7% |
| Moran Wealth Management, LLC | 61.3K | 0.7% |
| CenterBook Partners LP | 61.2K | 0.7% |
| Lisanti Capital Growth, LLC | 54.1K | 0.6% |
| Calamos Advisors LLC | 40.5K | 0.5% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | Reduced | 2.2M | 1.6M | -628.7K |
| SG Capital Management LLC | New | 0 | 500.1K | +500.1K |
| Assenagon Asset Management S.A. | Reduced | 439.6K | 140.4K | -299.2K |
| Thrivent Financial for Lutherans | Increased | 608.0K | 902.7K | +294.7K |
| Swedbank AB | Increased | 203.0K | 443.0K | +240.0K |
| AGF MANAGEMENT LTD | New | 0 | 147.3K | +147.3K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Sold Out | 134.0K | 0 | -134.0K |
| Bank of New York Mellon Corp | Increased | 167.0K | 227.5K | +60.5K |
| CITIGROUP INC | Increased | 32.9K | 92.0K | +59.1K |
| Russell Investments Group, Ltd. | Reduced | 262.5K | 204.7K | -57.8K |
| NEW SOUTH CAPITAL MANAGEMENT INC | Increased | 257.3K | 306.4K | +49.1K |
| CenterBook Partners LP | Increased | 16.8K | 61.2K | +44.4K |
| DEUTSCHE BANK AG\ | Reduced | 335.8K | 295.0K | -40.8K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 44.6K | 11.3K | -33.2K |
| COOKSON PEIRCE & CO INC | Sold Out | 27.6K | 0 | -27.6K |
| Cambridge Investment Research Advisors, Inc. | Reduced | 52.8K | 26.5K | -26.3K |
| Calamos Advisors LLC | Reduced | 63.0K | 40.5K | -22.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.5M | 1.5M | +21.0K |
| GREAT LAKES ADVISORS, LLC | Reduced | 83.4K | 62.6K | -20.8K |
| Y-Intercept (Hong Kong) Ltd | Reduced | 31.2K | 15.8K | -15.4K |
| Lisanti Capital Growth, LLC | Reduced | 67.3K | 54.1K | -13.2K |
| Counterpoint Mutual Funds LLC | Sold Out | 13.2K | 0 | -13.2K |
| OPPENHEIMER & CO INC | Sold Out | 12.9K | 0 | -12.9K |
| VIRGINIA RETIREMENT SYSTEMS ET Al | Reduced | 13.1K | 4.7K | -8.4K |
| LPL Financial LLC | Increased | 9.9K | 17.9K | +8.0K |
| Penn Capital Management Company, LLC | Increased | 237.1K | 245.0K | +7.9K |
| US BANCORP \DE\ | Increased | 3.6K | 11.5K | +7.9K |
| Yorktown Management & Research Co Inc | Increased | 17.2K | 24.3K | +7.1K |
| BARCLAYS PLC | Increased | 109.1K | 114.7K | +5.6K |
| KESTRA PRIVATE WEALTH SERVICES, LLC | Sold Out | 4.9K | 0 | -4.9K |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | 150.4K | 145.7K | -4.7K |
| HIGHLAND CAPITAL MANAGEMENT, LLC | New | 0 | 4.6K | +4.6K |
| Brookstone Capital Management | Reduced | 7.8K | 3.5K | -4.3K |
| Savant Capital, LLC | New | 0 | 4.2K | +4.2K |
| Rockwood Wealth Management, LLC | Sold Out | 4.2K | 0 | -4.2K |
| ANB BANK | Sold Out | 4.1K | 0 | -4.1K |
| SIMPLEX TRADING, LLC | Reduced | 5.7K | 1.6K | -4.1K |
| State of New Jersey Common Pension Fund D | Increased | 12.8K | 16.7K | +3.9K |
| FOCUSED ALPHA, LLC | New | 0 | 3.7K | +3.7K |
| MARATHON CAPITAL MANAGEMENT | Reduced | 95.4K | 91.8K | -3.6K |
| Axxion S.A. | Sold Out | 3.6K | 0 | -3.6K |
| NorthCrest Asset Manangement, LLC | Reduced | 32.2K | 28.7K | -3.6K |
| COMMONWEALTH EQUITY SERVICES, LLC | Reduced | 8.3K | 4.7K | -3.5K |
| MINDSET WEALTH MANAGEMENT, LLC | New | 0 | 3.5K | +3.5K |
| Atria Investments, Inc | Increased | 2.4K | 5.6K | +3.1K |
| STRS OHIO | Reduced | 5.1K | 2.1K | -3.0K |
| WEDBUSH SECURITIES INC | Sold Out | 3.0K | 0 | -3.0K |
| Abacus Wealth Partners, LLC | Sold Out | 2.8K | 0 | -2.8K |
| Vise Technologies, Inc. | Sold Out | 2.8K | 0 | -2.8K |
| Moran Wealth Management, LLC | Increased | 58.5K | 61.3K | +2.8K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Reduced | 33.9K | 31.2K | -2.7K |
| Creative Planning | Reduced | 34.2K | 31.7K | -2.5K |
| OPPENHEIMER ASSET MANAGEMENT INC. | Sold Out | 2.5K | 0 | -2.5K |
| PARK AVENUE SECURITIES LLC | Sold Out | 2.3K | 0 | -2.3K |
| Caitong International Asset Management Co., Ltd | Increased | 240 | 2.3K | +2.1K |
| HARBOR CAPITAL ADVISORS, INC. | Reduced | 12.5K | 10.5K | -2.0K |
| State of Wyoming | Reduced | 7.9K | 5.9K | -2.0K |
| Amundi | Reduced | 198.1K | 196.4K | -1.7K |
| LANARK FINANCIAL, INC. | Reduced | 8.4K | 6.7K | -1.6K |
| Sterling Capital Management LLC | Increased | 185 | 1.7K | +1.6K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.