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HowShorted

How shorted is Five9, Inc.? FIVN

#510most shorted US stockof 3,805 ranked stocks, more shorted than 86%

11.69%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.26
5 reports (~10 weeks)
+0.74
days to cover
5.57
Aggregate net short position time series for Five9, 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 Five9, 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 202612.40% 31 Jul 202615.16% 14 Aug 2026+2.76
30 Apr 20268.08% 15 Apr 202613.47% 15 May 2026+5.39
19 Feb 202610.29% 13 Feb 20269.09% 27 Feb 2026−1.20
6 Nov 20259.70% 31 Oct 202511.11% 14 Nov 2025+1.41
31 Jul 20259.20% 15 Jul 20259.82% 15 Aug 2025+0.62
1 May 202510.71% 30 Apr 202511.31% 15 May 2025+0.60
3 Apr 20258.65% 31 Mar 20259.65% 15 Apr 2025+1.00
20 Feb 20257.47% 14 Feb 20259.04% 28 Feb 2025+1.57

Fails to deliver

The SEC's fails-to-deliver figure for FIVN: 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
2,839
14 Sep 2026
Highest in window
18,776
9 Jul 2026
Days with a balance
51
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Five9, 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 19K shares.

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Sector: Technology

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202611.69%+0.26
31 Aug 202611.43%−3.73
14 Aug 202615.16%+2.76
31 Jul 202612.40%+2.19
15 Jul 202610.21%−0.74
30 Jun 202610.95%+0.81
15 Jun 202610.14%−1.84
29 May 202611.98%−1.49
15 May 202613.47%+4.76
30 Apr 20268.71%+0.63
15 Apr 20268.08%−0.56
31 Mar 20268.64%−0.33
13 Mar 20268.97%−0.12
27 Feb 20269.09%−1.20
13 Feb 202610.29%+1.34
30 Jan 20268.95%+0.97
15 Jan 20267.98%−0.78
31 Dec 20258.76%−0.74
15 Dec 20259.50%−1.47
28 Nov 202510.97%−0.14
14 Nov 202511.11%+1.41
31 Oct 20259.70%+0.41
15 Oct 20259.29%+0.64
30 Sep 20258.65%−1.23
15 Sep 20259.88%−0.30
29 Aug 202510.18%+0.36
15 Aug 20259.82%+0.90
31 Jul 20258.92%−0.28
15 Jul 20259.20%−1.24
30 Jun 202510.44%+0.94
13 Jun 20259.50%−0.83
30 May 202510.33%−0.98
15 May 202511.31%+0.60
30 Apr 202510.71%+1.06
15 Apr 20259.65%+1.00
31 Mar 20258.65%−1.89
14 Mar 202510.54%+1.50
28 Feb 20259.04%+1.57
14 Feb 20257.47%+0.14
31 Jan 20257.33%+0.03
15 Jan 20257.30%+0.23
31 Dec 20247.07%−0.65
13 Dec 20247.72%−0.55
29 Nov 20248.27%−0.99
15 Nov 20249.26%−2.21
31 Oct 202411.47%+1.63
15 Oct 20249.84%−0.34
30 Sep 202410.18%+1.45
13 Sep 20248.73%+1.09
30 Aug 20247.64%+0.06
15 Aug 20247.58%−0.93
31 Jul 20248.51%−0.04
15 Jul 20248.55%+0.34
28 Jun 20248.21%−0.45
14 Jun 20248.66%0.00
31 May 20248.66%−0.20
15 May 20248.86%+2.51
30 Apr 20246.35%+0.73
15 Apr 20245.62%+1.03
28 Mar 20244.59%+0.63
15 Mar 20243.96%−0.29
29 Feb 20244.25%+1.94
15 Feb 20242.31%−0.19
31 Jan 20242.50%−1.21
12 Jan 20243.71%−0.44
29 Dec 20234.15%−0.46
15 Dec 20234.61%+0.39
30 Nov 20234.22%−0.13
15 Nov 20234.35%+0.50
31 Oct 20233.85%−0.22
13 Oct 20234.07%−0.17
29 Sep 20234.24%+0.26
15 Sep 20233.98%+0.10
31 Aug 20233.88%−0.36
15 Aug 20234.24%+0.40
31 Jul 20233.84%−1.32
14 Jul 20235.16%−0.04
30 Jun 20235.20%−0.95
15 Jun 20236.15%+0.19
31 May 20235.96%+0.13
15 May 20235.83%+0.82
28 Apr 20235.01%−0.75
14 Apr 20235.76%−0.35
31 Mar 20236.11%+0.04
15 Mar 20236.07%−0.27
28 Feb 20236.34%+1.18
15 Feb 20235.16%−1.03
31 Jan 20236.19%−1.26
13 Jan 20237.45%−0.61
30 Dec 20228.06%+2.14
15 Dec 20225.92%−0.48
30 Nov 20226.40%−1.90
15 Nov 20228.30%+0.82
31 Oct 20227.48%+1.31
14 Oct 20226.17%−0.58
30 Sep 20226.75%−0.28
15 Sep 20227.03%+1.19
31 Aug 20225.84%−0.86
15 Aug 20226.70%−0.53
29 Jul 20227.23%+0.32
15 Jul 20226.91%−0.81
30 Jun 20227.72%+0.62
15 Jun 20227.10%−1.80
31 May 20228.90%+0.47
13 May 20228.43%+0.61
29 Apr 20227.82%−0.14
14 Apr 20227.96%−0.48
31 Mar 20228.44%+1.19
15 Mar 20227.25%−0.22
28 Feb 20227.47%+1.05
15 Feb 20226.42%−0.30
31 Jan 20226.72%+0.34
14 Jan 20226.38%+0.63
31 Dec 20215.75%−0.01
15 Dec 20215.76%−0.04
30 Nov 20215.80%+0.37
15 Nov 20215.43%−0.99
29 Oct 20216.42%−1.61
15 Oct 20218.03%+1.24
30 Sep 20216.79%−2.93
15 Sep 20219.72%+1.14
31 Aug 20218.58%+1.52
13 Aug 20217.06%+0.68
30 Jul 20216.38%+2.33
15 Jul 20214.05%−0.03
30 Jun 20214.08%−0.40
15 Jun 20214.48%−0.28
28 May 20214.76%−0.03
14 May 20214.79%+0.29
30 Apr 20214.50%+0.32
15 Apr 20214.18%+0.20
31 Mar 20213.98%−0.30
15 Mar 20214.28%+0.19
26 Feb 20214.09%+0.77
12 Feb 20213.32%−1.15
29 Jan 20214.47%−0.31
15 Jan 20214.78%+0.13
31 Dec 20204.65%−0.17
15 Dec 20204.82%+0.30
30 Nov 20204.52%−0.39
13 Nov 20204.91%−0.42
30 Oct 20205.33%−0.06
15 Oct 20205.39%+0.20
30 Sep 20205.19%−0.20
15 Sep 20205.39%−0.33
31 Aug 20205.72%−0.35
14 Aug 20206.07%+0.29
31 Jul 20205.78%−0.06
15 Jul 20205.84%−0.01
30 Jun 20205.85%−0.02
15 Jun 20205.87%−0.99
29 May 20206.86%−0.77
15 May 20207.63%−1.20
30 Apr 20208.83%−0.27
15 Apr 20209.10%−0.45
31 Mar 20209.55%+1.88
13 Mar 20207.67%+0.77
28 Feb 20206.90%+0.09
14 Feb 20206.81%−0.22
31 Jan 20207.03%+0.15
15 Jan 20206.88%−0.14
31 Dec 20197.02%−0.03
13 Dec 20197.05%−0.43
29 Nov 20197.48%+0.12
15 Nov 20197.36%−1.34
31 Oct 20198.70%+0.12
15 Oct 20198.58%+0.15
30 Sep 20198.43%+0.12
13 Sep 20198.31%−0.12
30 Aug 20198.43%−0.97
15 Aug 20199.40%+0.44
31 Jul 20198.96%−0.31
15 Jul 20199.27%+0.85
28 Jun 20198.42%−1.71
14 Jun 201910.13%+0.75
31 May 20199.38%−0.23
15 May 20199.61%−0.30
30 Apr 20199.91%+0.13
15 Apr 20199.78%+1.55
29 Mar 20198.23%−2.18
15 Mar 201910.41%+2.38
28 Feb 20198.03%+1.19
15 Feb 20196.84%+0.42
31 Jan 20196.42%−0.67
15 Jan 20197.09%−0.34
31 Dec 20187.43%−0.05
14 Dec 20187.48%+0.50
30 Nov 20186.98%−0.15
15 Nov 20187.13%+0.12
31 Oct 20187.01%+0.38
15 Oct 20186.63%+0.17
28 Sep 20186.46%+0.62
14 Sep 20185.84%+0.37
31 Aug 20185.47%+0.24
15 Aug 20185.23%+1.15
31 Jul 20184.08%+3.39
30 Apr 20180.69%+0.04
13 Apr 20180.65%−0.22
29 Mar 20180.87%−0.16
15 Mar 20181.03%+0.30
28 Feb 20180.73%−0.25
15 Feb 20180.98%+0.25
31 Jan 20180.73%−0.19
12 Jan 20180.92%−0.04
29 Dec 20170.96%–

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

Frequently asked questions

How shorted is Five9, Inc. right now?
11.69% of Five9, Inc.'s (FIVN) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 510th 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 FIVN'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 FIVN's days to cover?
5.57 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.