CECO CECO Environmental Corp.

NASDAQ
$70.67

CECO Environmental Corp. (CECO) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+10.34
16 buyers / 13 sellers
BUYING
Funds compared
29
funds with comparable CECO positions
24 current holders · 23 prior-quarter holders
Net share change
+1.20M
+2.08M added, -883.6K cut
Position activity
6 new 10 increased 8 reduced 5 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Divisadero Street Capital Management Long/Short Increased +1.14M +608.9% $103.6M 2.8% 70
Farallon Capital Management Event Value Sold Out -234.0K -100.0% $21.2M 0.0% 64
Qube Research & Technologies Ltd Quant New +81.9K — $7.4M 0.0% 57
TIG Advisors Event Sold Out -54.2K -100.0% $4.9M 0.0% 56
Tudor Investment Corporation Macro Sold Out -47.3K -100.0% $4.3M 0.0% 56
MILLENNIUM MANAGEMENT LLC Increased +247.7K +2105.1% $22.5M 0.0% 55
Jain Global Long/Short Quant New +34.8K — $3.2M 0.0% 54
Man Group Event Long/Short Sold Out -5.6K -100.0% $510.7K 0.0% 52
CenterBook Partners Long/Short Quant New +16.8K — $1.5M 0.1% 51
Lighthouse Investment Partners Sold Out -3.7K -100.0% $333.0K 0.0% 51

Most significant buyers

By move score, not size.

  • Divisadero Street Capital Management Increased · +1.14M
  • Qube Research & Technologies Ltd New · +81.9K
  • MILLENNIUM MANAGEMENT LLC Increased · +247.7K
  • Jain Global New · +34.8K
  • CenterBook Partners New · +16.8K

Most significant sellers

By move score, not size.

  • Farallon Capital Management Sold Out · -234.0K
  • TIG Advisors Sold Out · -54.2K
  • Tudor Investment Corporation Sold Out · -47.3K
  • Man Group Sold Out · -5.6K
  • Lighthouse Investment Partners Sold Out · -3.7K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Divisadero Street Capital Management 2 1.3M 187.6K +1.14M +608.9% 2.8% Increased 70
Farallon Capital Management 1 0 234.0K -234.0K -100.0% 0.0% Sold Out 64
Qube Research & Technologies Ltd 2 81.9K 0 +81.9K — 0.0% New 57
TIG Advisors 3 0 54.2K -54.2K -100.0% 0.0% Sold Out 56
Tudor Investment Corporation 2 0 47.3K -47.3K -100.0% 0.0% Sold Out 56
MILLENNIUM MANAGEMENT LLC 2 259.5K 11.8K +247.7K +2105.1% 0.0% Increased 55
Jain Global 3 34.8K 0 +34.8K — 0.0% New 54
Man Group 3 0 5.6K -5.6K -100.0% 0.0% Sold Out 52
CenterBook Partners 4 16.8K 0 +16.8K — 0.1% New 51
Lighthouse Investment Partners 3 0 3.7K -3.7K -100.0% 0.0% Sold Out 51
Y-Intercept 4 31.2K 0 +31.2K — 0.1% New 50
Voloridge Investment Management 2 6.6K 134.4K -127.7K -95.1% 0.0% Reduced 50
Walleye Capital 3 169.9K 38.4K +131.4K +341.8% 0.1% Increased 50
Bridgewater Associates 1 2.4K 9.3K -6.9K -74.5% 0.0% Reduced 49
MARSHALL WACE, LLP 2 57.9K 251.9K -194.0K -77.0% 0.0% Reduced 48
Centiva Capital 4 4.3K 0 +4.3K — 0.0% New 48
Quantbot Technologies 4 12.1K 0 +12.1K — 0.0% New 47
Engineers Gate 4 243.2K 3.4K +239.7K +6952.1% 0.3% Increased 47
Brevan Howard Capital Management 3 12.1K 6.1K +6.0K +98.6% 0.0% Increased 43
Aquatic Capital Management 4 4.9K 52.7K -47.8K -90.7% 0.0% Reduced 42
Boothbay Fund Management 4 5.2K 22.1K -16.8K -76.3% 0.0% Reduced 39
Squarepoint Ops LLC 2 79.7K 165.3K -85.6K -51.8% 0.0% Reduced 39
Point72 Asset Management, L.P. 1 196.1K 159.1K +37.1K +23.3% 0.0% Increased 36
Magnetar Capital 2 3.7K 7.1K -3.4K -47.7% 0.0% Reduced 35
CITADEL ADVISORS LLC 1 160.9K 217.4K -56.5K -26.0% 0.0% Reduced 35
AQR Capital Management 3 129.8K 93.2K +36.6K +39.3% 0.0% Increased 31
TWO SIGMA INVESTMENTS, LP 2 1.0M 959.7K +53.7K +5.6% 0.1% Increased 29
Hudson Bay Capital Management 3 40.1K 35.0K +5.1K +14.7% 0.0% Increased 26
Trexquant Investment 3 24.4K 21.7K +2.7K +12.5% 0.0% Increased 23

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.