Who owns CECO Environmental (CECO)
Which tracked institutional funds hold CECO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CECO company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on CECO is one-sided between 2026-Q1 and 2026-Q2: 195 added or opened and 29 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
CECO’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes CECO more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in CECO divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 323 tracked filers holding CECO, 227 increased or opened the position and 108 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in CECO between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 47
- Jupiter Topco LLC$86M
- VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.$30M
- Harvey Partners, LLC$28M
- NEW SOUTH CAPITAL MANAGEMENT INC$23M
- Penn Capital Management Company, LLC$22M
- Assenagon Asset Management S.A.$20M
Full exits 18
- T. Rowe Price Investment Management, Inc.$127M
- JANUS HENDERSON GROUP PLC$53M
- Thrivent Financial for Lutherans$38M
- LORD, ABBETT & CO. LLC$25M
- FARALLON CAPITAL MANAGEMENT LLC$14M
- BESSEMER GROUP INC$13M
Largest adds
- FMR LLC$274M
- BlackRock, Inc.$256M
- DIMENSIONAL FUND ADVISORS LP$144M
- VANGUARD CAPITAL MANAGEMENT LLC$133M
- Divisadero Street Capital Management, LP$109M
- Driehaus Capital Management LLC$103M
Largest trims
- MARSHALL WACE, LLP$10M
- OSTERWEIS CAPITAL MANAGEMENT INC$9M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$7M
- FRANKLIN RESOURCES INC$7M
- MARTIN & CO INC /TN/$5M
- Aquatic Capital Management LLC$3M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC added | 4,524,438 | $411M | 10.1% | 2026-Q2 |
| BlackRock, Inc. added | 4,323,986 | $392M | 9.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 2,339,252 | $212M | 5.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 2,185,315 | $198M | 4.9% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 2,088,421 | $190M | 4.7% | 2026-Q2 |
| Driehaus Capital Management LLC added | 1,560,486 | $142M | 3.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,460,389 | $133M | 3.3% | 2026-Q2 |
| Divisadero Street Capital Management, LP added | 1,329,817 | $121M | 3.0% | 2026-Q2 |
| STATE STREET CORP added | 1,264,690 | $115M | 2.8% | 2026-Q2 |
| Capital World Investors added | 1,157,200 | $105M | 2.6% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 1,013,412 | $92M | 2.3% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC added | 957,500 | $87M | 2.1% | 2026-Q2 |
| Jupiter Topco LLC new | 949,904 | $86M | 2.1% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 842,317 | $76M | 1.9% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 835,692 | $76M | 1.9% | 2026-Q2 |
| EMERALD ADVISERS, LLC added | 736,784 | $67M | 1.7% | 2026-Q2 |
| KING LUTHER CAPITAL MANAGEMENT CORP trimmed | 716,925 | $65M | 1.6% | 2026-Q2 |
| Invesco Ltd. added | 667,929 | $61M | 1.5% | 2026-Q2 |
| IES Holdings, Inc. added | 623,527 | $57M | 1.4% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 568,484 | $52M | 1.3% | 2026-Q2 |
| NORTHERN TRUST CORP added | 492,491 | $45M | 1.1% | 2026-Q2 |
| UBS Group AG added | 475,224 | $43M | 1.1% | 2026-Q2 |
| EMERALD MUTUAL FUND ADVISERS TRUST added | 471,220 | $43M | 1.1% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 454,727 | $41M | 1.0% | 2026-Q2 |
| Legal & General Group Plc added | 445,900 | $40M | 1.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 442,654 | $40M | 1.0% | 2026-Q2 |
| Nuveen, LLC added | 414,241 | $38M | 0.9% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 396,295 | $36M | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 379,724 | $34M | 0.9% | 2026-Q2 |
| OBERWEIS ASSET MANAGEMENT INC/ added | 358,072 | $32M | 0.8% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 335,846 | $30M | 0.8% | 2026-Q2 |
| VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. new | 327,348 | $30M | 0.7% | 2026-Q2 |
| Harvey Partners, LLC new | 311,132 | $28M | 0.7% | 2026-Q2 |
| KENNEDY CAPITAL MANAGEMENT LLC added | 284,314 | $26M | 0.6% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 274,322 | $25M | 0.6% | 2026-Q2 |
| MORGAN STANLEY trimmed | 266,873 | $24M | 0.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 266,161 | $24M | 0.6% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 262,460 | $24M | 0.6% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 259,494 | $24M | 0.6% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC added | 259,165 | $24M | 0.6% | 2026-Q2 |
| NEW SOUTH CAPITAL MANAGEMENT INC new | 257,327 | $23M | 0.6% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 245,863 | $22M | 0.6% | 2026-Q2 |
| Engineers Gate Manager LP added | 243,155 | $22M | 0.5% | 2026-Q2 |
| Penn Capital Management Company, LLC new | 237,119 | $22M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 233,498 | $21M | 0.5% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 219,963 | $20M | 0.5% | 2026-Q2 |
| Assenagon Asset Management S.A. added | 219,789 | $20M | 0.5% | 2026-Q2 |
| Swedbank AB new | 203,000 | $18M | 0.5% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 197,960 | $18M | 0.4% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 196,130 | $18M | 0.4% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 169,895 | $15M | 0.4% | 2026-Q2 |
| Walleye Capital LLC added | 169,886 | $15M | 0.4% | 2026-Q2 |
| Bank of New York Mellon Corp added | 166,997 | $15M | 0.4% | 2026-Q2 |
| Robeco Schweiz AG trimmed | 165,171 | $15M | 0.4% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 164,287 | $15M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 160,872 | $15M | 0.4% | 2026-Q2 |
| Pier Capital, LLC added | 152,071 | $14M | 0.3% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 151,603 | $14M | 0.3% | 2026-Q2 |
| ESSEX INVESTMENT MANAGEMENT CO LLC trimmed | 150,416 | $14M | 0.3% | 2026-Q2 |
| POLEN CAPITAL MANAGEMENT LLC trimmed | 137,977 | $13M | 0.3% | 2026-Q2 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed | 134,020 | $12M | 0.3% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC trimmed | 132,443 | $12M | 0.3% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 129,798 | $12M | 0.3% | 2026-Q2 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 125,517 | $11M | 0.3% | 2026-Q2 |
| Informed Momentum Co LLC added | 120,677 | $11M | 0.3% | 2026-Q2 |
| MARTIN & CO INC /TN/ trimmed | 111,401 | $10M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 109,738 | $10M | 0.2% | 2026-Q2 |
| BARCLAYS PLC added | 109,082 | $10M | 0.2% | 2026-Q2 |
| Hodges Capital Management Inc. new | 107,831 | $10M | 0.2% | 2026-Q2 |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC new | 102,959 | $9M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 102,871 | $9M | 0.2% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 97,233 | $9M | 0.2% | 2026-Q2 |
| MARATHON CAPITAL MANAGEMENT trimmed | 95,430 | $9M | 0.2% | 2026-Q2 |
| Granahan Investment Management, LLC added | 94,823 | $9M | 0.2% | 2026-Q2 |
| RBF Capital, LLC added | 92,820 | $8M | 0.2% | 2026-Q2 |
| Panoramic Capital, LLC added | 87,460 | $8M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 84,269 | $8M | 0.2% | 2026-Q2 |
| GREAT LAKES ADVISORS, LLC trimmed | 83,420 | $8M | 0.2% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 83,382 | $8M | 0.2% | 2026-Q2 |
| Qube Research & Technologies Ltd new | 81,933 | $7M | 0.2% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO new | 81,665 | $7M | 0.2% | 2026-Q2 |
| De Lisle Partners LLP new | 81,441 | $7M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 79,708 | $7M | 0.2% | 2026-Q2 |
| Alberta Investment Management Corp new | 78,364 | $7M | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 76,176 | $7M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 76,027 | $7M | 0.2% | 2026-Q2 |
| Legato Capital Management LLC added | 74,674 | $7M | 0.2% | 2026-Q2 |
| Peregrine Asset Advisers, Inc. trimmed | 72,756 | $7M | 0.2% | 2026-Q2 |
| CREDIT AGRICOLE S A added | 69,140 | $6M | 0.2% | 2026-Q2 |
| Meros Investment Management, LP new | 68,066 | $6M | 0.2% | 2026-Q2 |
| Lisanti Capital Growth, LLC added | 67,275 | $6M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 67,161 | $6M | 0.2% | 2026-Q2 |
| Calamos Advisors LLC added | 62,971 | $6M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 61,975 | $6M | 0.1% | 2026-Q2 |
| WHITE PINE CAPITAL LLC added | 61,372 | $6M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 60,981 | $6M | 0.1% | 2026-Q2 |
| ALPINE ASSOCIATES MANAGEMENT INC. new | 58,934 | $5M | 0.1% | 2026-Q2 |
| Moran Wealth Management, LLC added | 58,495 | $5M | 0.1% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 57,886 | $5M | 0.1% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 56,748 | $5M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.