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HowShorted

How shorted is CECO ENVIRONMENTAL CORP? CECO

#2,326most shorted US stockof 3,805 ranked stocks, more shorted than 38%

3.36%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.39
5 reports (~10 weeks)
−8.52
days to cover
2.72
Aggregate net short position time series for CECO ENVIRONMENTAL CORP

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for CECO ENVIRONMENTAL CORP days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
28 Apr 20269.73% 15 Apr 202611.88% 30 Apr 2026+2.15
24 Feb 20265.18% 13 Feb 20266.96% 27 Feb 2026+1.78
28 Oct 20256.49% 15 Oct 20257.50% 31 Oct 2025+1.01
29 Jul 20256.95% 15 Jul 20256.07% 31 Jul 2025−0.88
29 Apr 20256.08% 15 Apr 20256.48% 30 Apr 2025+0.40
25 Feb 20255.75% 14 Feb 20256.40% 28 Feb 2025+0.65
17 Jan 20256.01% 15 Jan 20255.23% 31 Jan 2025−0.78
29 Oct 20244.32% 15 Oct 20245.24% 31 Oct 2024+0.92

Fails to deliver

The SEC's fails-to-deliver figure for CECO: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Latest balance
94
14 Sep 2026
Highest in window
75,720
1 Apr 2026
Days with a balance
66
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for CECO ENVIRONMENTAL CORP fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 76K shares.

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Sector: Industrials

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20263.36%+0.39
31 Aug 20262.97%+0.18
14 Aug 20262.79%−13.96
29 May 202616.75%+2.35
15 May 202614.40%+2.52
30 Apr 202611.88%+2.15
15 Apr 20269.73%−0.05
31 Mar 20269.78%+0.92
13 Mar 20268.86%+1.90
27 Feb 20266.96%+1.78
13 Feb 20265.18%−0.55
30 Jan 20265.73%−0.36
15 Jan 20266.09%+0.08
31 Dec 20256.01%−0.23
15 Dec 20256.24%−0.19
28 Nov 20256.43%+0.27
14 Nov 20256.16%−1.34
31 Oct 20257.50%+1.01
15 Oct 20256.49%−0.26
30 Sep 20256.75%+0.37
15 Sep 20256.38%−0.27
29 Aug 20256.65%+0.48
15 Aug 20256.17%+0.10
31 Jul 20256.07%−0.88
15 Jul 20256.95%−0.04
30 Jun 20256.99%+0.62
13 Jun 20256.37%−0.63
30 May 20257.00%+1.18
15 May 20255.82%−0.66
30 Apr 20256.48%+0.40
15 Apr 20256.08%+0.24
31 Mar 20255.84%−0.45
14 Mar 20256.29%−0.11
28 Feb 20256.40%+0.65
14 Feb 20255.75%+0.52
31 Jan 20255.23%−0.78
15 Jan 20256.01%−0.31
31 Dec 20246.32%+0.56
13 Dec 20245.76%+0.23
29 Nov 20245.53%+0.50
15 Nov 20245.03%−0.21
31 Oct 20245.24%+0.92
15 Oct 20244.32%−0.46
30 Sep 20244.78%+0.07
13 Sep 20244.71%+0.35
30 Aug 20244.36%−0.21
15 Aug 20244.57%−0.15
31 Jul 20244.72%+0.20
15 Jul 20244.52%+1.04
28 Jun 20243.48%+0.49
14 Jun 20242.99%−0.24
31 May 20243.23%−0.47
15 May 20243.70%+0.49
30 Apr 20243.21%+0.13
15 Apr 20243.08%−0.20
28 Mar 20243.28%−0.19
15 Mar 20243.47%+0.29
29 Feb 20243.18%+0.35
15 Feb 20242.83%−0.08
31 Jan 20242.91%−0.16
12 Jan 20243.07%+0.06
29 Dec 20233.01%−0.12
15 Dec 20233.13%+0.13
30 Nov 20233.00%−0.06
15 Nov 20233.06%−0.21
31 Oct 20233.27%+0.18
13 Oct 20233.09%−0.23
29 Sep 20233.32%−0.32
15 Sep 20233.64%+0.41
31 Aug 20233.23%−0.05
15 Aug 20233.28%+0.50
31 Jul 20232.78%+1.64
15 Jun 20231.14%+0.47
31 May 20230.67%−0.22
15 May 20230.89%−0.08
28 Apr 20230.97%−0.25
14 Apr 20231.22%+0.26
31 Mar 20230.96%+0.14
15 Mar 20230.82%−0.22
28 Feb 20231.04%+0.16
15 Feb 20230.88%+0.01
31 Jan 20230.87%−0.08
13 Jan 20230.95%−2.60
15 Jun 20223.55%+0.27
31 May 20223.28%+0.10
13 May 20223.18%+0.14
29 Apr 20223.04%+0.99
14 Apr 20222.05%+0.30
31 Mar 20221.75%+0.17
15 Mar 20221.58%+0.20
28 Feb 20221.38%+0.15
15 Feb 20221.23%+0.14
31 Jan 20221.09%+0.26
14 Jan 20220.83%+0.01
31 Dec 20210.82%0.00
15 Dec 20210.82%+0.02
30 Nov 20210.80%−0.04
15 Nov 20210.84%−0.03
29 Oct 20210.87%+0.05
15 Oct 20210.82%−0.28
30 Sep 20211.10%−0.06
15 Sep 20211.16%+0.06
31 Aug 20211.10%+0.06
13 Aug 20211.04%+0.01
30 Jul 20211.03%−0.05
15 Jul 20211.08%+0.27
30 Jun 20210.81%−0.35
15 Jun 20211.16%−0.16
28 May 20211.32%+0.09
14 May 20211.23%+0.40
30 Apr 20210.83%0.00
15 Apr 20210.83%+0.07
31 Mar 20210.76%−0.18
15 Mar 20210.94%−0.57
26 Feb 20211.51%−0.18
12 Feb 20211.69%+0.04
29 Jan 20211.65%+0.13
15 Jan 20211.52%0.00
31 Dec 20201.52%+0.11
15 Dec 20201.41%+0.02
30 Nov 20201.39%−0.02
13 Nov 20201.41%+0.10
30 Oct 20201.31%−0.29
15 Oct 20201.60%−0.24
30 Sep 20201.84%+0.09
15 Sep 20201.75%−0.01
31 Aug 20201.76%−0.10
14 Aug 20201.86%−0.02
31 Jul 20201.88%+0.01
15 Jul 20201.87%+0.27
30 Jun 20201.60%+0.65
15 Jun 20200.95%−0.05
29 May 20201.00%−0.03
15 May 20201.03%−0.02
30 Apr 20201.05%−0.16
15 Apr 20201.21%0.00
31 Mar 20201.21%−0.49
13 Mar 20201.70%−0.36
28 Feb 20202.06%−0.29
14 Feb 20202.35%−0.50
31 Jan 20202.85%−0.05
15 Jan 20202.90%−0.01
31 Dec 20192.91%−0.05
13 Dec 20192.96%−0.01
29 Nov 20192.97%−0.15
15 Nov 20193.12%0.00
31 Oct 20193.12%−0.03
15 Oct 20193.15%−0.29
30 Sep 20193.44%−0.10
13 Sep 20193.54%0.00
30 Aug 20193.54%+0.06
15 Aug 20193.48%+0.22
31 Jul 20193.26%−0.13
15 Jul 20193.39%+0.20
28 Jun 20193.19%+0.23
14 Jun 20192.96%+0.21
31 May 20192.75%−0.13
15 May 20192.88%+0.15
30 Apr 20192.73%−0.19
15 Apr 20192.92%+0.12
29 Mar 20192.80%−0.20
15 Mar 20193.00%−0.02
28 Feb 20193.02%+0.02
15 Feb 20193.00%+0.16
31 Jan 20192.84%+0.13
15 Jan 20192.71%−0.28
31 Dec 20182.99%0.00
14 Dec 20182.99%+0.23
30 Nov 20182.76%+0.26
15 Nov 20182.50%+0.07
31 Oct 20182.43%+0.05
15 Oct 20182.38%+0.06
28 Sep 20182.32%+0.02
14 Sep 20182.30%−0.09
31 Aug 20182.39%−0.59
15 Aug 20182.98%−0.10
31 Jul 20183.08%−0.07
13 Jul 20183.15%+0.02
29 Jun 20183.13%−0.14
15 Jun 20183.27%−0.15
31 May 20183.42%−1.24
15 May 20184.66%−0.24
30 Apr 20184.90%+0.19
13 Apr 20184.71%+0.41
29 Mar 20184.30%+0.20
15 Mar 20184.10%+0.52
28 Feb 20183.58%+0.22
15 Feb 20183.36%+0.76
31 Jan 20182.60%−0.01
12 Jan 20182.61%+0.04
29 Dec 20172.57%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is CECO ENVIRONMENTAL CORP right now?
3.36% of CECO ENVIRONMENTAL CORP's (CECO) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,326th most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this CECO's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is CECO's days to cover?
2.72 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.