CECO ENVIRONMENTAL CORP (CECO) Institutional Shareholders
CECO ENVIRONMENTAL CORP (CECO) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.61B in CECO holdings during the latest filing period.
Fmr Llc is currently the largest disclosed institutional shareholder of CECO tracked by InsiderSet, reporting ownership valued at approximately $410.55M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $314.36M, representing an estimated loss of -23.43% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% of the total disclosed CECO value among the investors covered in this analysis. Major shareholders include Fmr Llc, Blackrock, Inc., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in CECO ENVIRONMENTAL CORP (CECO).
This page ranks the largest institutional CECO shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
329
Total Reported Value
$4.61B
Largest Holder
Fmr Llc
Largest Position
$410.55M
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
95
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Fmr Llc | 0.02% | 4,524,438 | $410,547,534 | $314,357,952 | -$96,189,582 | -23.43% | |
| Blackrock, Inc. | 0.01% | 4,323,986 | $392,358,496 | $300,430,547 | -$91,927,949 | -23.43% | |
| Vanguard Capital Management Llc | 0.00% | 2,339,252 | $212,263,727 | $162,531,229 | -$49,732,498 | -23.43% | |
| Dimensional Fund Advisors Lp | 0.04% | 2,185,315 | $198,294,132 | $151,835,686 | -$46,458,446 | -23.43% | |
| T. Rowe Price Investment Management, Inc. | 0.13% | 2,153,953 | $195,450,000 | $149,656,654 | -$45,793,346 | -23.43% | |
| American Century Companies Inc | 0.08% | 2,088,421 | $189,503,480 | $145,103,491 | -$44,399,989 | -23.43% | |
| Driehaus Capital Management Llc | 0.82% | 1,560,486 | $141,598,500 | $108,422,567 | -$33,175,933 | -23.43% | |
| Geode Capital Management, Llc | 0.01% | 1,460,389 | $132,541,360 | $101,467,828 | -$31,073,532 | -23.44% | |
| Divisadero Street Capital Management, Lp | 2.82% | 1,329,817 | $120,667,595 | $92,395,685 | -$28,271,910 | -23.43% | |
| State Street Corp | 0.00% | 1,264,690 | $114,757,971 | $87,870,661 | -$26,887,310 | -23.43% | |
| Capital World Investors | 0.01% | 1,157,200 | $105,004,328 | $80,402,256 | -$24,602,072 | -23.43% | |
| Two Sigma Investments, Lp | 0.07% | 1,013,412 | $91,957,005 | $70,411,866 | -$21,545,139 | -23.43% | |
| Needham Investment Management Llc | 2.62% | 957,500 | $86,883,550 | $66,527,100 | -$20,356,450 | -23.43% | |
| Royce & Associates Lp | 0.62% | 842,317 | $76,431,845 | $58,524,185 | -$17,907,660 | -23.43% | |
| Price T Rowe Associates Inc | 0.01% | 835,692 | $75,831,000 | $58,063,880 | -$17,767,120 | -23.43% | |
| Emerald Advisers, Llc | 1.57% | 736,784 | $66,855,780 | $51,191,752 | -$15,664,028 | -23.43% | |
| King Luther Capital Management Corp | 0.27% | 716,925 | $65,053,775 | $49,811,949 | -$15,241,826 | -23.43% | |
| Invesco Ltd. | 0.00% | 667,929 | $60,607,877 | $46,407,707 | -$14,200,170 | -23.43% | |
| Lord, Abbett & Co. Llc | 0.17% | 642,111 | $58,265,000 | $44,613,872 | -$13,651,128 | -23.43% | |
| Ies Holdings, Inc. | 18.22% | 623,527 | $56,578,840 | $43,322,656 | -$13,256,184 | -23.43% | |
| Thrivent Financial For Lutherans | 0.09% | 607,981 | $55,167,000 | $42,242,520 | -$12,924,480 | -23.43% | |
| Gw&K Investment Management, Llc | 0.43% | 601,544 | $54,584,000 | $41,795,277 | -$12,788,723 | -23.43% | |
| Janus Henderson Group Plc | 0.03% | 894,782 | $53,311,112 | $62,169,453 | +$8,858,341 | +16.62% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 568,484 | $51,584,238 | $39,498,268 | -$12,085,970 | -23.43% | |
| Northern Trust Corp | 0.01% | 492,491 | $44,688,634 | $34,218,275 | -$10,470,359 | -23.43% | |
| Ubs Group Ag | 0.01% | 475,224 | $43,121,825 | $33,018,564 | -$10,103,261 | -23.43% | |
| Emerald Mutual Fund Advisers Trust | 1.50% | 471,220 | $42,758,503 | $32,740,366 | -$10,018,137 | -23.43% | |
| Vanguard Portfolio Management Llc | 0.00% | 454,727 | $41,261,928 | $31,594,432 | -$9,667,496 | -23.43% | |
| Legal & General Group Plc | 0.01% | 445,900 | $40,460,966 | $30,981,132 | -$9,479,834 | -23.43% | |
| Charles Schwab Investment Management Inc | 0.01% | 442,654 | $40,166,424 | $30,755,600 | -$9,410,824 | -23.43% | |
| Nuveen, Llc | 0.01% | 414,241 | $37,588,228 | $28,781,465 | -$8,806,763 | -23.43% | |
| Voya Investment Management Llc | 0.03% | 396,295 | $35,959,808 | $27,534,577 | -$8,425,231 | -23.43% | |
| Vanguard Fiduciary Trust Co | 0.01% | 379,724 | $34,456,156 | $26,383,224 | -$8,072,932 | -23.43% | |
| Oberweis Asset Management Inc/ | 0.67% | 358,072 | $32,491,453 | $24,878,843 | -$7,612,610 | -23.43% | |
| Deutsche Bank Ag\ | 0.01% | 335,846 | $30,474,666 | $23,334,580 | -$7,140,086 | -23.43% | |
| Van Lanschot Kempen Investment Management N.V. | 0.23% | 327,348 | $29,703,558 | $22,744,139 | -$6,959,419 | -23.43% | |
| Harvey Partners, Llc | 1.96% | 311,132 | $28,232,118 | $21,617,451 | -$6,614,667 | -23.43% | |
| Kennedy Capital Management Llc | 0.46% | 284,314 | $25,798,626 | $19,754,137 | -$6,044,489 | -23.43% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.04% | 274,322 | $24,891,979 | $19,059,893 | -$5,832,086 | -23.43% |
| Morgan Stanley | 0.00% | 266,873 | $24,216,144 | $18,542,336 | -$5,673,808 | -23.43% | |
| Goldman Sachs Group Inc | 0.00% | 266,161 | $24,151,434 | $18,492,866 | -$5,658,568 | -23.43% | |
| Russell Investments Group, Ltd. | 0.02% | 262,460 | $23,815,731 | $18,235,721 | -$5,580,010 | -23.43% | |
| Millennium Management Llc | 0.02% | 259,494 | $23,546,486 | $18,029,643 | -$5,516,843 | -23.43% | |
| Segall Bryant & Hamill, Llc | 0.28% | 259,165 | $23,516,632 | $18,006,784 | -$5,509,848 | -23.43% | |
| New South Capital Management Inc | 1.02% | 257,327 | $23,349,889 | $17,879,080 | -$5,470,809 | -23.43% | |
| Rockefeller Capital Management L.P. | 0.03% | 245,863 | $22,309,609 | $17,082,561 | -$5,227,048 | -23.43% | |
| Engineers Gate Manager Lp | 0.29% | 243,155 | $22,063,885 | $16,894,409 | -$5,169,476 | -23.43% | |
| Penn Capital Management Company, Llc | 1.37% | 237,119 | $21,554,033 | $16,475,028 | -$5,079,005 | -23.56% | |
| Bank Of America Corp | 0.00% | 233,498 | $21,187,609 | $16,223,441 | -$4,964,168 | -23.43% | |
| Bessemer Group Inc | 0.03% | 220,139 | $19,976,000 | $15,295,258 | -$4,680,742 | -23.43% |
Frequently asked questions about CECO
Who owns the most CECO stock?
The largest holders of CECO are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CECO ENVIRONMENTAL CORP (CECO).
Is CECO widely held by superinvestors?
Many widely followed stocks like CECO appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CECO is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.