CECO Environmental Corp.
DE ˙ DB ˙ US1251411013
70,04 € ↑1,26 (1,83%)
2026-06-04
DEL PRIS
SecurityDE:WCE / CECO Environmental Corp.
InstitutionSei Investments Co
Latest Disclosed Ownership107,975 shares
Latest Disclosed Value $ 6,462,301
Sei Investments Co reports 86.01% increase in ownership of WCE / CECO Environmental Corp.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 107,975 shares of CECO Environmental Corp. (DE:WCE) valued at $5,517,522 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 58,047 shares of CECO Environmental Corp.. This represents a change in shares of 86.01% during the quarter. The current value of the position is $7,562,569 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)
2026-02-13 2025-12-31 13F CECO ENVIRONMENTAL COM 125141101 107,975 49,928 86.01 6,462 117.43
2025-11-13 2025-09-30 13F CECO ENVIRONMENTAL COM 125141101 58,047 -9,745 -14.37 2,972 54.87 0.0032
2025-08-14 2025-06-30 13F CECO ENVIRONMENTAL COM 125141101 67,792 3,675 5.73 1,919 31.35 0.0022
2025-05-14 2025-03-31 13F/A-1 CECO ENVIRONMENTAL COM 125141101 64,117 -46,007 -41.78 1,462 -56.11 0.0019
2025-05-13 2025-03-31 13F CECO ENVIRONMENTAL COM 125141101 110,124 0 3,329 0.0036
2025-02-11 2024-12-31 13F CECO ENVIRONMENTAL COM 125141101 110,124 15,104 15.90 3,329 24.26 0.0043
2024-11-12 2024-09-30 13F CECO ENVIRONMENTAL COM 125141101 95,020 -4,069 -4.11 2,680 -6.26 0.0035
2024-08-13 2024-06-30 13F CECO ENVIRONMENTAL COM 125141101 99,089 28,960 41.30 2,859 77.08 0.0041
2024-05-07 2024-03-31 13F CECO ENVIRONMENTAL COM 125141101 70,129 18,272 35.24 1,614 53.57 0.0024
2024-02-14 2023-12-31 13F CECO ENVIRONMENTAL COM 125141101 51,857 24,477 89.40 1,052 140.50 0.0017
2023-11-14 2023-09-30 13F CECO ENVIRONMENTAL COM 125141101 27,380 -51,603 -65.33 437 -58.58 0.0008
2023-08-11 2023-06-30 13F CECO ENVIRONMENTAL COM 125141101 78,983 -3,520 -4.27 1,055 -8.58 0.0018
2023-05-12 2023-03-31 13F CECO ENVIRONMENTAL COM 125141101 82,503 -43,567 -34.56 1,154 -21.60 0.0021
2023-02-10 2022-12-31 13F CECO ENVIRONMENTAL COM 125141101 126,070 -47,907 -27.54 1,472 -4.42 0.0033
2022-11-14 2022-09-30 13F CECO ENVIRONMENTAL COM 125141101 173,977 -44,805 -20.48 1,540 17.74 0.0034
2022-08-15 2022-06-30 13F CECO ENVIRONMENTAL COM 125141101 218,782 0 0.00 1,308 8.91 0.0028
2022-05-13 2022-03-31 13F CECO ENVIRONMENTAL COM 125141101 218,782 36,782 20.21 1,201 5.91 0.0024
2022-02-14 2021-12-31 13F CECO ENVIRONMENTAL COM 125141101 182,000 29,000 18.95 1,134 5.29 0.0021
2021-11-12 2021-09-30 13F CECO ENVIRONMENTAL COM 125141101 153,000 30,396 24.79 1,077 22.67 0.0023
2021-08-06 2021-06-30 13F CECO ENVIRONMENTAL COM 125141101 122,604 18,419 17.68 878 6.30 0.0019
2021-05-12 2021-03-31 13F CECO ENVIRONMENTAL COM 125141101 104,185 19,849 23.54 826 40.72 0.0021
2021-02-08 2020-12-31 13F CECO ENVIRONMENTAL COM 125141101 84,336 17,515 26.21 587 20.53 0.0015
2020-12-04 2020-09-30 13F/A-1 CECO ENVIRONMENTAL COM 125141101 66,821 -1,852 -2.70 487 7.51 0.0014
2020-11-06 2020-09-30 13F CECO ENVIRONMENTAL COM 125141101 66,821 -1,852 487 1,172.5877
2020-08-17 2020-06-30 13F/A-1 CECO ENVIRONMENTAL COM 125141101 68,673 0 0.00 453 41.12 0.0014
2020-08-11 2020-06-30 13F CECO ENVIRONMENTAL COM 125141101 67,373 -1,300 516 1,399.6775
2020-05-14 2020-03-31 13F CECO ENVIRONMENTAL COM 125141101 68,673 1,300 1.93 321 -37.79 0.0012
2020-02-06 2019-12-31 13F CECO ENVIRONMENTAL COM 125141101 67,373 1,346 2.04 516 11.93 0.0015
2019-11-12 2019-09-30 13F CECO ENVIRONMENTAL COM 125141101 66,027 9,290 16.37 461 -15.26 0.0012
2019-08-14 2019-06-30 13F CECO ENVIRONMENTAL COM 125141101 56,737 -1,105 -1.91 544 30.77 0.0018
2019-05-15 2019-03-31 13F CECO ENVIRONMENTAL COM 125141101 57,842 583 1.02 416 -7.76 0.0014
2019-02-13 2018-12-31 13F CECO ENVIRONMENTAL COM 125141101 57,259 0 0.00 451 0.00 0.0016
2018-11-08 2018-09-30 13F CECO ENVIRONMENTAL COM 125141101 57,259 0 0.00 451 28.13 0.0016
2018-08-03 2018-06-30 13F CECO ENVIRONMENTAL COM 125141101 57,259 -2,143 -3.61 352 33.33 0.0012
2018-05-11 2018-03-31 13F CECO ENVIRONMENTAL COM 125141101 59,402 6,396 12.07 264 -2.94 0.0010
2018-02-08 2017-12-31 13F CECO ENVIRONMENTAL COM 125141101 53,006 28,141 113.18 272 29.52 0.0009
2017-11-06 2017-09-30 13F CECO ENVIRONMENTAL COM 125141101 24,865 24,865 210 0.0007
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.