CECO Environmental Corp.
US ˙ NasdaqGS ˙ US1251411013

SecurityCECO / CECO Environmental Corp.
InstitutionD. E. Shaw & Co., Inc.
ManagerDE Shaw
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
D. E. Shaw & Co., Inc. closes position in CECO / CECO Environmental Corp.

On November 14, 2025 - D. E. Shaw & Co., Inc. filed a 13F-HR form disclosing ownership of 0 shares of CECO Environmental Corp. (US:CECO) valued at $0 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 10,849 shares of CECO Environmental Corp.. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-11-14 2025-09-30 13F CECO ENVIRONMENTAL COM 125141101 0 -100.00 0
2025-08-14 2025-06-30 13F CECO ENVIRONMENTAL COM 125141101 10,849 -2,251 -17.18 307 3.02 0.0002
2025-05-15 2025-03-31 13F CECO ENVIRONMENTAL COM 125141101 13,100 4,300 48.86 299 12.03 0.0003
2025-02-14 2024-12-31 13F CECO ENVIRONMENTAL COM 125141101 8,800 -438 -4.74 266 2.31 0.0002
2024-11-14 2024-09-30 13F CECO ENVIRONMENTAL COM 125141101 9,238 -1,901 -17.07 261 -19.00 0.0002
2024-08-14 2024-06-30 13F CECO ENVIRONMENTAL COM 125141101 11,139 -38,458 -77.54 321 -51.51 0.0003
2023-08-14 2023-06-30 13F CECO ENVIRONMENTAL COM 125141101 49,597 -11,942 -19.41 663 -23.02 0.0007
2023-05-15 2023-03-31 13F CECO ENVIRONMENTAL COM 125141101 61,539 -66,226 -51.83 861 -42.36 0.0009
2023-02-14 2022-12-31 13F CECO ENVIRONMENTAL COM 125141101 127,765 -29,390 -18.70 1,492 7.26 0.0016
2022-11-14 2022-09-30 13F CECO ENVIRONMENTAL COM 125141101 157,155 -11,207 -6.66 1,391 38.13 0.0017
2022-08-15 2022-06-30 13F CECO ENVIRONMENTAL COM 125141101 168,362 144,031 591.96 1,007 651.49 0.0012
2022-05-16 2022-03-31 13F CECO ENVIRONMENTAL COM 125141101 24,331 4,171 20.69 134 6.35 0.0001
2022-02-14 2021-12-31 13F CECO ENVIRONMENTAL COM 125141101 20,160 2,350 13.19 126 0.80 0.0001
2021-11-15 2021-09-30 13F CECO ENVIRONMENTAL COM 125141101 17,810 1,876 11.77 125 9.65 0.0001
2021-08-16 2021-06-30 13F CECO ENVIRONMENTAL COM 125141101 15,934 -9,846 -38.19 114 -44.12 0.0001
2021-05-17 2021-03-31 13F CECO ENVIRONMENTAL COM 125141101 25,780 3,107 13.70 204 29.11 0.0002
2021-02-16 2020-12-31 13F CECO ENVIRONMENTAL COM 125141101 22,673 6,733 42.24 158 36.21 0.0001
2020-11-16 2020-09-30 13F CECO ENVIRONMENTAL COM 125141101 15,940 -43,375 -73.13 116 -70.33 0.0001
2020-08-14 2020-06-30 13F CECO ENVIRONMENTAL COM 125141101 59,315 -26,462 -30.85 391 -2.25 0.0005
2020-05-15 2020-03-31 13F CECO ENVIRONMENTAL COM 125141101 85,777 -24,524 -22.23 400 -52.66 0.0006
2020-02-14 2019-12-31 13F CECO ENVIRONMENTAL COM 125141101 110,301 -7,743 -6.56 845 2.55 0.0010
2019-11-14 2019-09-30 13F CECO ENVIRONMENTAL COM 125141101 118,044 -75,112 -38.89 824 -55.51 0.0010
2019-08-14 2019-06-30 13F CECO ENVIRONMENTAL COM 125141101 193,156 -9,344 -4.61 1,852 27.02 0.0023
2019-05-15 2019-03-31 13F CECO ENVIRONMENTAL COM 125141101 202,500 42,138 26.28 1,458 34.75 0.0019
2019-02-14 2018-12-31 13F CECO ENVIRONMENTAL COM 125141101 160,362 -25,275 -13.62 1,082 -26.04 0.0015
2018-11-14 2018-09-30 13F CECO ENVIRONMENTAL COM 125141101 185,637 -9,766 -5.00 1,463 21.92 0.0018
2018-08-14 2018-06-30 13F CECO ENVIRONMENTAL COM 125141101 195,403 140,339 254.87 1,200 389.80 0.0016
2018-05-15 2018-03-31 13F CECO ENVIRONMENTAL COM 125141101 55,064 -38,807 -41.34 245 -49.17 0.0003
2018-02-14 2017-12-31 13F CECO ENVIRONMENTAL COM 125141101 93,871 61,687 191.67 482 77.21 0.0007
2017-11-14 2017-09-30 13F CECO ENVIRONMENTAL COM 125141101 32,184 5,830 22.12 272 12.40 0.0004
2017-08-14 2017-06-30 13F CECO ENVIRONMENTAL COM 125141101 26,354 26,354 242 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.