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HowShorted

How shorted is Custom Truck One Source, Inc.? CTOS

#2,902most shorted US stockof 3,805 ranked stocks, more shorted than 23%

2.05%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.10
5 reports (~10 weeks)
+0.72
days to cover
4.22
Aggregate net short position time series for Custom Truck One Source, Inc.

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 Custom Truck One Source, Inc. 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
3 Aug 20261.54% 31 Jul 20261.57% 14 Aug 2026+0.03
27 Apr 20260.98% 15 Apr 20260.75% 30 Apr 2026−0.23
10 Mar 20260.78% 27 Feb 20260.82% 13 Mar 2026+0.04
27 Oct 20251.58% 15 Oct 20251.50% 31 Oct 2025−0.08
30 Jul 20251.99% 15 Jul 20251.50% 31 Jul 2025−0.49
30 Apr 20252.20% 15 Apr 20252.38% 15 May 2025+0.18
4 Mar 20252.04% 28 Feb 20251.87% 14 Mar 2025−0.17
30 Oct 20242.03% 15 Oct 20241.97% 31 Oct 2024−0.06

Fails to deliver

The SEC's fails-to-deliver figure for CTOS: 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.

Last balance on file
24,497
10 Sep 2026
Highest in window
452,437
30 Jun 2026
Days with a balance
86
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Custom Truck One Source, Inc. 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 452K shares.

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Sector: Industrials

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20262.05%+0.10
31 Aug 20261.95%+0.38
14 Aug 20261.57%+0.03
31 Jul 20261.54%+0.11
15 Jul 20261.43%+0.10
30 Jun 20261.33%+0.23
15 Jun 20261.10%+0.18
29 May 20260.92%+0.02
15 May 20260.90%+0.15
30 Apr 20260.75%−0.23
15 Apr 20260.98%+0.11
31 Mar 20260.87%+0.05
13 Mar 20260.82%+0.04
27 Feb 20260.78%−0.06
13 Feb 20260.84%−0.05
30 Jan 20260.89%−0.03
15 Jan 20260.92%−0.03
31 Dec 20250.95%−0.16
15 Dec 20251.11%−0.12
28 Nov 20251.23%−0.04
14 Nov 20251.27%−0.23
31 Oct 20251.50%−0.08
15 Oct 20251.58%+0.10
30 Sep 20251.48%+0.25
15 Sep 20251.23%−0.16
29 Aug 20251.39%−0.11
15 Aug 20251.50%0.00
31 Jul 20251.50%−0.49
15 Jul 20251.99%−0.22
30 Jun 20252.21%−0.32
13 Jun 20252.53%+0.15
30 May 20252.38%0.00
15 May 20252.38%−0.07
30 Apr 20252.45%+0.25
15 Apr 20252.20%+0.12
31 Mar 20252.08%+0.21
14 Mar 20251.87%−0.17
28 Feb 20252.04%−0.01
14 Feb 20252.05%+0.25
31 Jan 20251.80%+0.06
15 Jan 20251.74%−0.04
31 Dec 20241.78%−0.12
13 Dec 20241.90%−0.01
29 Nov 20241.91%+0.11
15 Nov 20241.80%−0.17
31 Oct 20241.97%−0.06
15 Oct 20242.03%−0.01
30 Sep 20242.04%−0.12
13 Sep 20242.16%+0.20
30 Aug 20241.96%+0.08
15 Aug 20241.88%+0.16
31 Jul 20241.72%+0.02
15 Jul 20241.70%−0.09
28 Jun 20241.79%+0.11
14 Jun 20241.68%+0.21
31 May 20241.47%+0.15
15 May 20241.32%+0.03
30 Apr 20241.29%+0.29
15 Apr 20241.00%+0.31
28 Mar 20240.69%+0.14
15 Mar 20240.55%−0.11
29 Feb 20240.66%−0.01
15 Feb 20240.67%+0.16
31 Jan 20240.51%−0.10
12 Jan 20240.61%0.00
29 Dec 20230.61%+0.04
15 Dec 20230.57%−0.09
30 Nov 20230.66%+0.03
15 Nov 20230.63%+0.06
31 Oct 20230.57%−0.09
13 Oct 20230.66%−0.06
29 Sep 20230.72%−0.02
15 Sep 20230.74%0.00
31 Aug 20230.74%−0.15
15 Aug 20230.89%−0.01
31 Jul 20230.90%−0.09
14 Jul 20230.99%−0.01
30 Jun 20231.00%−0.11
15 Jun 20231.11%+0.57
31 May 20230.54%+0.04
15 May 20230.50%−0.18
28 Apr 20230.68%+0.16
14 Apr 20230.52%0.00
31 Mar 20230.52%−0.02
15 Mar 20230.54%−0.05
28 Feb 20230.59%−0.19
15 Feb 20230.78%+0.13
31 Jan 20230.65%−0.14
13 Jan 20230.79%+0.11
30 Dec 20220.68%−0.25
15 Dec 20220.93%+0.24
30 Nov 20220.69%−0.08
15 Nov 20220.77%−0.07
31 Oct 20220.84%−0.01
14 Oct 20220.85%−0.05
30 Sep 20220.90%−0.12
15 Sep 20221.02%+0.09
31 Aug 20220.93%+0.03
15 Aug 20220.90%+0.02
29 Jul 20220.88%−0.11
15 Jul 20220.99%−0.07
30 Jun 20221.06%+0.12
15 Jun 20220.94%+0.10
31 May 20220.84%+0.10
13 May 20220.74%−0.20
29 Apr 20220.94%−0.21
14 Apr 20221.15%+0.18
31 Mar 20220.97%+0.01
15 Mar 20220.96%−0.06
28 Feb 20221.02%+0.04
15 Feb 20220.98%+0.19
31 Jan 20220.79%+0.15
14 Jan 20220.64%−0.11
31 Dec 20210.75%+0.03
15 Dec 20210.72%−0.08
30 Nov 20210.80%−0.36
15 Nov 20211.16%−0.02
29 Oct 20211.18%−0.03
15 Oct 20211.21%+0.06
30 Sep 20211.15%+0.54
15 Sep 20210.61%−0.13
31 Aug 20210.74%+0.07
13 Aug 20210.67%−2.69
30 Jul 20213.36%−1.66
15 Jul 20215.02%+2.62
31 Mar 20212.40%+0.39
15 Mar 20212.01%+0.11
26 Feb 20211.90%+0.58
12 Feb 20211.32%−0.03
29 Jan 20211.35%+0.01
15 Jan 20211.34%−0.20
31 Dec 20201.54%+0.28
15 Dec 20201.26%+0.32
30 Nov 20200.94%+0.05
13 Nov 20200.89%−0.04
30 Oct 20200.93%−0.05
15 Oct 20200.98%−0.08
30 Sep 20201.06%+0.04
15 Sep 20201.02%+0.01
31 Aug 20201.01%+0.03
14 Aug 20200.98%−0.09
31 Jul 20201.07%−0.27
15 Jul 20201.34%0.00
30 Jun 20201.34%+0.62
15 Jun 20200.72%−0.03
29 May 20200.75%−0.03
15 May 20200.78%−0.05
30 Apr 20200.83%−0.01
15 Apr 20200.84%−0.21
31 Mar 20201.05%−0.04
13 Mar 20201.09%+0.22
28 Feb 20200.87%−0.08
14 Feb 20200.95%+0.06
31 Jan 20200.89%+0.06
15 Jan 20200.83%+0.02
31 Dec 20190.81%−0.03
13 Dec 20190.84%+0.01
29 Nov 20190.83%+0.17
15 Nov 20190.66%−0.03
31 Oct 20190.69%−0.14
15 Oct 20190.83%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is Custom Truck One Source, Inc. right now?
2.05% of Custom Truck One Source, Inc.'s (CTOS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,902nd 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 CTOS'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 CTOS's days to cover?
4.22 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.