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 June 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 |
|---|---|---|
| FMR LLC | 4.5M | 8.7% |
| BlackRock, Inc. | 4.3M | 8.3% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.3M | 4.5% |
| DIMENSIONAL FUND ADVISORS LP | 2.2M | 4.2% |
| T. Rowe Price Investment Management, Inc. | 2.2M | 4.1% |
| AMERICAN CENTURY COMPANIES INC | 2.1M | 4.0% |
| Driehaus Capital Management LLC | 1.6M | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.5M | 2.8% |
| Divisadero Street Capital Management, LP | 1.3M | 2.6% |
| STATE STREET CORP | 1.3M | 2.4% |
| Capital World Investors | 1.2M | 2.2% |
| TWO SIGMA INVESTMENTS, LP | 1.0M | 1.9% |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 957.5K | 1.8% |
| Jupiter Topco LLC | 949.9K | 1.8% |
| ROYCE & ASSOCIATES LP | 842.3K | 1.6% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 835.7K | 1.6% |
| EMERALD ADVISERS, LLC | 736.8K | 1.4% |
| KING LUTHER CAPITAL MANAGEMENT CORP | 716.9K | 1.4% |
| Invesco Ltd. | 667.9K | 1.3% |
| LORD, ABBETT & CO. LLC | 642.1K | 1.2% |
| IES Holdings, Inc. | 623.5K | 1.2% |
| Thrivent Financial for Lutherans | 608.0K | 1.2% |
| GW&K Investment Management, LLC | 601.5K | 1.2% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 568.5K | 1.1% |
| First Eagle Investment Management, LLC | 548.6K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Increased | 2.3M | 4.5M | +2.2M |
| BlackRock, Inc. | Increased | 2.3M | 4.3M | +2.0M |
| DIMENSIONAL FUND ADVISORS LP | Increased | 903.3K | 2.2M | +1.3M |
| Divisadero Street Capital Management, LP | Increased | 187.6K | 1.3M | +1.1M |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1.3M | 2.3M | +1.0M |
| Driehaus Capital Management LLC | Increased | 639.9K | 1.6M | +920.6K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 21.4K | 835.7K | +814.3K |
| Invesco Ltd. | Increased | 37.0K | 667.9K | +631.0K |
| STATE STREET CORP | Increased | 657.3K | 1.3M | +607.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 856.1K | 1.5M | +604.3K |
| GW&K Investment Management, LLC | New | 0 | 601.5K | +601.5K |
| NEEDHAM INVESTMENT MANAGEMENT LLC | Increased | 387.5K | 957.5K | +570.0K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 115.2K | 568.5K | +453.2K |
| Assenagon Asset Management S.A. | New | 0 | 439.6K | +439.6K |
| VOYA INVESTMENT MANAGEMENT LLC | Increased | 5.1K | 396.3K | +391.2K |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. | New | 0 | 327.3K | +327.3K |
| Harvey Partners, LLC | New | 0 | 311.1K | +311.1K |
| First Eagle Investment Management, LLC | Increased | 242.5K | 548.6K | +306.1K |
| Nuveen, LLC | Increased | 121.9K | 414.2K | +292.4K |
| UBS Group AG | Increased | 201.1K | 475.2K | +274.1K |
| NEW SOUTH CAPITAL MANAGEMENT INC | New | 0 | 257.3K | +257.3K |
| MILLENNIUM MANAGEMENT LLC | Increased | 11.8K | 259.5K | +247.7K |
| NORTHERN TRUST CORP | Increased | 251.9K | 492.5K | +240.6K |
| Engineers Gate Manager LP | Increased | 3.4K | 243.2K | +239.7K |
| Penn Capital Management Company, LLC | New | 0 | 237.1K | +237.1K |
| FARALLON CAPITAL MANAGEMENT LLC | Sold Out | 234.0K | 0 | -234.0K |
| LORD, ABBETT & CO. LLC | Increased | 414.4K | 642.1K | +227.7K |
| OBERWEIS ASSET MANAGEMENT INC/ | Increased | 135.0K | 358.1K | +223.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 237.8K | 454.7K | +216.9K |
| EMERALD ADVISERS, LLC | Increased | 523.0K | 736.8K | +213.8K |
| Swedbank AB | New | 0 | 203.0K | +203.0K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 247.5K | 442.7K | +195.2K |
| AMERICAN CENTURY COMPANIES INC | Increased | 1.9M | 2.1M | +194.2K |
| MARSHALL WACE, LLP | Reduced | 251.9K | 57.9K | -194.0K |
| OSTERWEIS CAPITAL MANAGEMENT INC | Reduced | 226.6K | 51.8K | -174.8K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 209.7K | 379.7K | +170.0K |
| EMERALD MUTUAL FUND ADVISERS TRUST | Increased | 314.0K | 471.2K | +157.2K |
| BANK OF AMERICA CORP /DE/ | Increased | 76.3K | 233.5K | +157.2K |
| NEW YORK STATE COMMON RETIREMENT FUND | Increased | 10.4K | 164.3K | +153.9K |
| Russell Investments Group, Ltd. | Increased | 114.5K | 262.5K | +148.0K |
| GOLDMAN SACHS GROUP INC | Increased | 126.5K | 266.2K | +139.6K |
| MARTIN & CO INC /TN/ | Reduced | 249.5K | 111.4K | -138.1K |
| KENNEDY CAPITAL MANAGEMENT LLC | Increased | 149.8K | 284.3K | +134.5K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | New | 0 | 134.0K | +134.0K |
| Walleye Capital LLC | Increased | 38.4K | 169.9K | +131.4K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | 134.4K | 6.6K | -127.7K |
| FRANKLIN RESOURCES INC | Reduced | 147.5K | 21.2K | -126.3K |
| Informed Momentum Co LLC | New | 0 | 120.7K | +120.7K |
| DEUTSCHE BANK AG\ | Increased | 227.8K | 335.8K | +108.1K |
| Hodges Capital Management Inc. | New | 0 | 107.8K | +107.8K |
| BARCLAYS PLC | Increased | 5.8K | 109.1K | +103.3K |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | New | 0 | 103.0K | +103.0K |
| Capital World Investors | Increased | 1.1M | 1.2M | +102.1K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | New | 0 | 97.2K | +97.2K |
| RBF Capital, LLC | Increased | 3.9K | 92.8K | +88.9K |
| Squarepoint Ops LLC | Reduced | 165.3K | 79.7K | -85.6K |
| SEGALL BRYANT & HAMILL, LLC | Increased | 175.1K | 259.2K | +84.1K |
| MORGAN STANLEY | Reduced | 350.7K | 266.9K | -83.9K |
| Qube Research & Technologies Ltd | New | 0 | 81.9K | +81.9K |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | New | 0 | 81.7K | +81.7K |
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.