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HowShorted

How shorted is Zscaler, Inc.? ZS

#2,057most shorted US stockof 3,805 ranked stocks, more shorted than 45%

3.99%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.09
5 reports (~10 weeks)
−1.13
days to cover
1.47
Aggregate net short position time series for Zscaler, 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 Zscaler, 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 Sep 20263.90% 31 Aug 20263.99% 15 Sep 2026+0.09
26 May 20266.93% 15 May 20267.46% 29 May 2026+0.53
26 Feb 20264.46% 13 Feb 20264.45% 27 Feb 2026−0.01
25 Nov 20253.50% 14 Nov 20253.69% 28 Nov 2025+0.19
2 Sep 20253.57% 29 Aug 20253.66% 15 Sep 2025+0.09
29 May 20255.64% 15 May 20255.39% 30 May 2025−0.25
5 Mar 20253.37% 28 Feb 20254.01% 14 Mar 2025+0.64
2 Dec 20242.62% 29 Nov 20243.14% 13 Dec 2024+0.52

Fails to deliver

The SEC's fails-to-deliver figure for ZS: 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
69,799
14 Sep 2026
Highest in window
205,498
24 Feb 2026
Days with a balance
107
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Zscaler, 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 205K shares.

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Sector: Technology

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20263.99%+0.09
31 Aug 20263.90%+0.05
14 Aug 20263.85%−0.74
31 Jul 20264.59%−0.39
15 Jul 20264.98%−0.14
30 Jun 20265.12%−2.22
15 Jun 20267.34%−0.12
29 May 20267.46%+0.53
15 May 20266.93%+0.60
30 Apr 20266.33%−0.21
15 Apr 20266.54%+1.45
31 Mar 20265.09%+0.22
13 Mar 20264.87%+0.42
27 Feb 20264.45%−0.01
13 Feb 20264.46%−0.36
30 Jan 20264.82%+0.47
15 Jan 20264.35%−0.06
31 Dec 20254.41%+0.41
15 Dec 20254.00%+0.31
28 Nov 20253.69%+0.19
14 Nov 20253.50%−0.25
31 Oct 20253.75%+0.36
15 Oct 20253.39%−0.19
30 Sep 20253.58%−0.08
15 Sep 20253.66%+0.09
29 Aug 20253.57%−0.26
15 Aug 20253.83%−0.23
31 Jul 20254.06%+0.09
15 Jul 20253.97%−0.66
30 Jun 20254.63%−1.14
13 Jun 20255.77%+0.38
30 May 20255.39%−0.25
15 May 20255.64%+0.63
30 Apr 20255.01%+0.37
15 Apr 20254.64%+0.13
31 Mar 20254.51%+0.50
14 Mar 20254.01%+0.64
28 Feb 20253.37%−0.46
14 Feb 20253.83%+0.29
31 Jan 20253.54%+0.56
15 Jan 20252.98%−0.02
31 Dec 20243.00%−0.14
13 Dec 20243.14%+0.52
29 Nov 20242.62%+0.10
15 Nov 20242.52%−0.31
31 Oct 20242.83%−0.34
15 Oct 20243.17%−0.01
30 Sep 20243.18%−0.22
13 Sep 20243.40%+0.68
30 Aug 20242.72%−0.24
15 Aug 20242.96%−0.01
31 Jul 20242.97%+0.02
15 Jul 20242.95%−0.24
28 Jun 20243.19%−0.17
14 Jun 20243.36%+0.02
31 May 20243.34%+0.21
15 May 20243.13%+0.31
30 Apr 20242.82%−0.86
15 Apr 20243.68%+0.14
28 Mar 20243.54%+0.50
15 Mar 20243.04%+0.18
29 Feb 20242.86%−0.15
15 Feb 20243.01%−0.56
31 Jan 20243.57%+0.14
12 Jan 20243.43%−0.09
29 Dec 20233.52%−0.25
15 Dec 20233.77%−0.26
30 Nov 20234.03%−0.01
15 Nov 20234.04%+0.25
31 Oct 20233.79%+0.31
13 Oct 20233.48%+0.05
29 Sep 20233.43%−0.20
15 Sep 20233.63%−0.28
31 Aug 20233.91%−0.29
15 Aug 20234.20%+0.27
31 Jul 20233.93%−0.66
14 Jul 20234.59%−0.09
30 Jun 20234.68%−0.27
15 Jun 20234.95%+0.04
31 May 20234.91%−0.61
15 May 20235.52%−0.24
28 Apr 20235.76%+0.51
14 Apr 20235.25%+0.34
31 Mar 20234.91%+0.02
15 Mar 20234.89%+0.28
28 Feb 20234.61%−0.09
15 Feb 20234.70%−1.35
31 Jan 20236.05%−0.02
13 Jan 20236.07%+0.49
30 Dec 20225.58%+0.31
15 Dec 20225.27%+1.08
30 Nov 20224.19%−0.12
15 Nov 20224.31%−0.36
31 Oct 20224.67%+0.28
14 Oct 20224.39%−0.45
30 Sep 20224.84%−0.06
15 Sep 20224.90%+0.69
31 Aug 20224.21%−0.27
15 Aug 20224.48%+0.16
29 Jul 20224.32%+0.29
15 Jul 20224.03%−0.12
30 Jun 20224.15%−0.52
15 Jun 20224.67%−0.65
31 May 20225.32%+0.09
13 May 20225.23%+1.38
29 Apr 20223.85%−0.12
14 Apr 20223.97%−0.05
31 Mar 20224.02%+0.25
15 Mar 20223.77%−0.25
28 Feb 20224.02%−0.21
15 Feb 20224.23%−0.06
31 Jan 20224.29%−0.91
14 Jan 20225.20%−0.47
31 Dec 20215.67%−0.24
15 Dec 20215.91%+0.89
30 Nov 20215.02%−0.43
15 Nov 20215.45%+0.28
29 Oct 20215.17%+0.22
15 Oct 20214.95%+0.60
30 Sep 20214.35%−0.20
15 Sep 20214.55%−0.19
31 Aug 20214.74%+0.02
13 Aug 20214.72%−0.14
30 Jul 20214.86%+0.10
15 Jul 20214.76%−0.08
30 Jun 20214.84%+0.05
15 Jun 20214.79%+0.45
28 May 20214.34%+0.08
14 May 20214.26%+0.42
30 Apr 20213.84%+0.12
15 Apr 20213.72%+0.52
31 Mar 20213.20%−0.20
15 Mar 20213.40%+0.22
26 Feb 20213.18%−0.25
12 Feb 20213.43%+0.29
29 Jan 20213.14%−0.86
15 Jan 20214.00%−1.10
31 Dec 20205.10%+0.21
15 Dec 20204.89%−0.67
30 Nov 20205.56%−0.43
13 Nov 20205.99%+0.27
30 Oct 20205.72%+0.08
15 Oct 20205.64%+0.09
30 Sep 20205.55%−0.36
15 Sep 20205.91%−0.07
31 Aug 20205.98%−0.07
14 Aug 20206.05%+0.03
31 Jul 20206.02%+0.18
15 Jul 20205.84%−0.25
30 Jun 20206.09%−0.37
15 Jun 20206.46%−1.41
29 May 20207.87%−0.15
15 May 20208.02%+0.53
30 Apr 20207.49%+0.05
15 Apr 20207.44%+0.20
31 Mar 20207.24%−1.83
13 Mar 20209.07%−0.05
28 Feb 20209.12%+0.24
14 Feb 20208.88%+0.11
31 Jan 20208.77%−1.98
15 Jan 202010.75%−0.32
31 Dec 201911.07%−0.34
13 Dec 201911.41%+0.58
29 Nov 201910.83%+0.45
15 Nov 201910.38%−0.01
31 Oct 201910.39%+0.73
15 Oct 20199.66%–

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

Frequently asked questions

How shorted is Zscaler, Inc. right now?
3.99% of Zscaler, Inc.'s (ZS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,057th 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 ZS'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 ZS's days to cover?
1.47 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.