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HowShorted

How shorted is COGENT COMMUNICATIONS HOLDINGS, INC.? CCOI

#382most shorted US stockof 3,805 ranked stocks, more shorted than 89%

13.40%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.60
5 reports (~10 weeks)
−0.80
days to cover
3.56
Aggregate net short position time series for COGENT COMMUNICATIONS HOLDINGS, 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 COGENT COMMUNICATIONS HOLDINGS, 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
6 Aug 202613.58% 31 Jul 202613.18% 14 Aug 2026−0.40
4 May 202610.58% 30 Apr 202610.44% 15 May 2026−0.14
20 Feb 202612.13% 13 Feb 202614.82% 27 Feb 2026+2.69
17 Nov 202513.59% 14 Nov 202513.04% 28 Nov 2025−0.55
6 Nov 202514.54% 31 Oct 202513.59% 14 Nov 2025−0.95
7 Aug 20259.98% 31 Jul 202511.26% 15 Aug 2025+1.28
8 May 20259.00% 30 Apr 20258.46% 15 May 2025−0.54
27 Feb 20257.58% 14 Feb 20257.45% 28 Feb 2025−0.13

Fails to deliver

The SEC's fails-to-deliver figure for CCOI: 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
5
14 Sep 2026
Highest in window
429,870
10 Sep 2026
Days with a balance
54
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for COGENT COMMUNICATIONS HOLDINGS, 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 430K shares.

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Sector: Media & telecom

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202613.40%−0.60
31 Aug 202614.00%+0.82
14 Aug 202613.18%−0.40
31 Jul 202613.58%−0.27
15 Jul 202613.85%−0.35
30 Jun 202614.20%+2.60
15 Jun 202611.60%−0.48
29 May 202612.08%+1.64
15 May 202610.44%−0.14
30 Apr 202610.58%−0.91
15 Apr 202611.49%−0.18
31 Mar 202611.67%−1.66
13 Mar 202613.33%−1.49
27 Feb 202614.82%+2.69
13 Feb 202612.13%+0.91
30 Jan 202611.22%−0.90
15 Jan 202612.12%−1.08
31 Dec 202513.20%+1.36
15 Dec 202511.84%−1.20
28 Nov 202513.04%−0.55
14 Nov 202513.59%−0.95
31 Oct 202514.54%+1.61
15 Oct 202512.93%+0.52
30 Sep 202512.41%+0.09
15 Sep 202512.32%+1.24
29 Aug 202511.08%−0.18
15 Aug 202511.26%+1.28
31 Jul 20259.98%−0.13
15 Jul 202510.11%−0.38
30 Jun 202510.49%+0.13
13 Jun 202510.36%−0.20
30 May 202510.56%+2.10
15 May 20258.46%−0.54
30 Apr 20259.00%−0.13
15 Apr 20259.13%+1.52
31 Mar 20257.61%−0.10
14 Mar 20257.71%+0.26
28 Feb 20257.45%−0.13
14 Feb 20257.58%+0.59
31 Jan 20256.99%−0.67
15 Jan 20257.66%+0.27
31 Dec 20247.39%+0.99
13 Dec 20246.40%−1.35
29 Nov 20247.75%−0.04
15 Nov 20247.79%−0.52
31 Oct 20248.31%−0.16
15 Oct 20248.47%−0.11
30 Sep 20248.58%−0.54
13 Sep 20249.12%+0.16
30 Aug 20248.96%−1.20
15 Aug 202410.16%+0.72
31 Jul 20249.44%−0.29
15 Jul 20249.73%+0.12
28 Jun 20249.61%+0.63
14 Jun 20248.98%+1.20
31 May 20247.78%+0.13
15 May 20247.65%+0.87
30 Apr 20246.78%+0.70
15 Apr 20246.08%+0.65
28 Mar 20245.43%−1.18
15 Mar 20246.61%+2.12
29 Feb 20244.49%−0.17
15 Feb 20244.66%+0.03
31 Jan 20244.63%+0.48
12 Jan 20244.15%+0.05
29 Dec 20234.10%+0.17
15 Dec 20233.93%+0.29
30 Nov 20233.64%+0.13
15 Nov 20233.51%+0.36
31 Oct 20233.15%+0.64
13 Oct 20232.51%−0.16
29 Sep 20232.67%−0.32
15 Sep 20232.99%+0.18
31 Aug 20232.81%−0.14
15 Aug 20232.95%+0.15
31 Jul 20232.80%−0.58
14 Jul 20233.38%+0.01
30 Jun 20233.37%−0.46
15 Jun 20233.83%0.00
31 May 20233.83%+0.12
15 May 20233.71%+0.23
28 Apr 20233.48%+0.05
14 Apr 20233.43%−0.09
31 Mar 20233.52%+0.78
15 Mar 20232.74%0.00
28 Feb 20232.74%+0.31
15 Feb 20232.43%−0.10
31 Jan 20232.53%−0.14
13 Jan 20232.67%−0.26
30 Dec 20222.93%−0.02
15 Dec 20222.95%+0.39
30 Nov 20222.56%−0.59
15 Nov 20223.15%−0.44
31 Oct 20223.59%−0.38
14 Oct 20223.97%+0.29
30 Sep 20223.68%−0.27
15 Sep 20223.95%+0.20
31 Aug 20223.75%−0.23
15 Aug 20223.98%+0.05
29 Jul 20223.93%+0.34
15 Jul 20223.59%+1.06
30 Jun 20222.53%−0.33
15 Jun 20222.86%+0.40
31 May 20222.46%−0.54
13 May 20223.00%+0.04
29 Apr 20222.96%+0.30
14 Apr 20222.66%+0.23
31 Mar 20222.43%−0.43
15 Mar 20222.86%0.00
28 Feb 20222.86%+0.54
15 Feb 20222.32%+0.66
31 Jan 20221.66%+0.06
14 Jan 20221.60%−0.02
31 Dec 20211.62%−0.49
15 Dec 20212.11%−0.05
30 Nov 20212.16%+0.22
15 Nov 20211.94%−0.24
29 Oct 20212.18%−0.25
15 Oct 20212.43%+0.32
30 Sep 20212.11%−0.01
15 Sep 20212.12%0.00
31 Aug 20212.12%+0.18
13 Aug 20211.94%−0.21
30 Jul 20212.15%−0.01
15 Jul 20212.16%−0.23
30 Jun 20212.39%−0.09
15 Jun 20212.48%−0.09
28 May 20212.57%−0.17
14 May 20212.74%+0.40
30 Apr 20212.34%−0.23
15 Apr 20212.57%−0.20
31 Mar 20212.77%−0.02
15 Mar 20212.79%−0.18
26 Feb 20212.97%0.00
12 Feb 20212.97%−0.46
29 Jan 20213.43%+0.25
15 Jan 20213.18%−0.26
31 Dec 20203.44%+0.15
15 Dec 20203.29%+0.67
30 Nov 20202.62%+0.65
13 Nov 20201.97%−0.27
30 Oct 20202.24%+0.39
15 Oct 20201.85%−0.38
30 Sep 20202.23%−0.08
15 Sep 20202.31%+0.25
31 Aug 20202.06%+0.16
14 Aug 20201.90%−0.77
31 Jul 20202.67%+0.35
15 Jul 20202.32%−0.22
30 Jun 20202.54%−0.39
15 Jun 20202.93%−0.27
29 May 20203.20%−0.49
15 May 20203.69%−1.12
30 Apr 20204.81%−0.30
15 Apr 20205.11%+0.99
31 Mar 20204.12%−0.38
13 Mar 20204.50%+1.07
28 Feb 20203.43%−0.61
14 Feb 20204.04%+0.27
31 Jan 20203.77%+0.10
15 Jan 20203.67%−0.27
31 Dec 20193.94%+0.20
13 Dec 20193.74%+0.28
29 Nov 20193.46%−0.09
15 Nov 20193.55%−0.24
31 Oct 20193.79%+0.08
15 Oct 20193.71%−0.23
30 Sep 20193.94%−0.13
13 Sep 20194.07%−0.36
30 Aug 20194.43%+0.26
15 Aug 20194.17%−0.34
31 Jul 20194.51%−0.44
15 Jul 20194.95%+0.29
28 Jun 20194.66%−0.66
14 Jun 20195.32%+0.06
31 May 20195.26%+0.09
15 May 20195.17%−0.56
30 Apr 20195.73%−0.02
15 Apr 20195.75%+0.24
29 Mar 20195.51%+0.49
15 Mar 20195.02%−0.09
28 Feb 20195.11%+0.18
15 Feb 20194.93%+0.26
31 Jan 20194.67%+0.31
15 Jan 20194.36%−0.58
31 Dec 20184.94%+0.04
14 Dec 20184.90%−0.62
30 Nov 20185.52%−0.02
15 Nov 20185.54%+0.36
31 Oct 20185.18%+0.07
15 Oct 20185.11%−0.07
28 Sep 20185.18%−0.19
14 Sep 20185.37%0.00
31 Aug 20185.37%−0.07
15 Aug 20185.44%+0.59
31 Jul 20184.85%−0.32
13 Jul 20185.17%−0.02
29 Jun 20185.19%−0.49
15 Jun 20185.68%−0.47
31 May 20186.15%+0.04
15 May 20186.11%−0.08
30 Apr 20186.19%−0.27
13 Apr 20186.46%+0.37
29 Mar 20186.09%+0.02
15 Mar 20186.07%+0.50
28 Feb 20185.57%−0.91
15 Feb 20186.48%−0.23
31 Jan 20186.71%−0.18
12 Jan 20186.89%+0.12
29 Dec 20176.77%–

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

Frequently asked questions

How shorted is COGENT COMMUNICATIONS HOLDINGS, INC. right now?
13.40% of COGENT COMMUNICATIONS HOLDINGS, INC.'s (CCOI) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 382nd 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 CCOI'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 CCOI's days to cover?
3.56 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.