Zscaler (ZS) Short Interest Ratio & Short Volume

$294.65 +7.99 (+2.79%)

Closing price 09/26/2025 04:00 PM Eastern

Extended Trading

$294.97 +0.32 (+0.11%)

As of 09/26/2025 07:59 PM Eastern

Zscaler Short Interest Data

Zscaler (ZS) has a short interest of 5.65 million shares, representing 5.78% of the float (the number of shares available for trading by the public). This marks a -5.36% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.0, indicating that it would take 3.0 days of the average trading volume of 1.90 million shares to cover all short positions.

Current Short Interest: 5,650,000 shares
Previous Short Interest: 5,970,000 shares
Change Vs. Previous Month: -5.36%
Dollar Volume Sold Short: $1.57 billion
Short Interest Ratio: 3.0 Days to Cover
Last Record Date: August 31, 2025

Outstanding Shares: 158,300,000 shares
Float Size: 97,740,000 shares
Short Percent of Float: 5.78%
Today's Trading Volume: 1,540,611 shares
Average Trading Volume: 1,902,978 shares
Today's Volume Vs. Average: 81%

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Short Interest Chart Days to Cover Chart Short Percent of Float Chart

ZS Short Interest Over Time

ZS Days to Cover Over Time

ZS Percentage of Float Shorted Over Time

Zscaler Short Interest History

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Report Date	Total Shares Sold Short	Dollar Volume Sold Short	Change from Previous Report	Percentage of Float Shorted	Days to Cover	Price on Report Date
8/31/2025	5,650,000 shares	$1.57 billion	-5.4%	5.8%	3	$277.05
8/15/2025	5,970,000 shares	$1.64 billion	-5.5%	6.1%	2.8	$274.97
7/31/2025	6,320,000 shares	$1.80 billion	+2.3%	6.5%	2.7	$285.56
7/15/2025	6,180,000 shares	$1.79 billion	+5,477.6%	6.4%	2.5	$288.90
6/30/2025	110,800 shares	$34.78 million	-98.8%	0.1%	0.3	$313.94
6/15/2025	8,980,000 shares	$2.71 billion	+7.0%	9.3%	3.3	$301.95
5/31/2025	8,390,000 shares	$2.30 billion	-3.9%	8.7%	3.2	$274.03
5/15/2025	8,730,000 shares	$2.15 billion	+12.8%	9.1%	3.5	$245.92
4/30/2025	7,740,000 shares	$1.75 billion	+7.8%	8.1%	3.3	$226.17
4/15/2025	7,180,000 shares	$1.47 billion	+2.9%	7.5%	3.3	$204.64
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3/31/2025	6,980,000 shares	$1.38 billion	+12.6%	7.3%	3.3	$198.42
3/15/2025	6,200,000 shares	$1.23 billion	+18.8%	6.5%	3.4	$197.81
2/28/2025	5,220,000 shares	$1.02 billion	-11.1%	5.5%	2.8	$196.23
2/15/2025	5,870,000 shares	$1.25 billion	+8.1%	6.2%	3.3	$212.70
1/31/2025	5,430,000 shares	$1.10 billion	+18.8%	5.7%	3.1	$202.59
1/15/2025	4,570,000 shares	$868.25 million	-0.9%	4.8%	2.7	$189.99
12/31/2024	4,610,000 shares	$831.69 million	-4.2%	4.9%	2.6	$180.41
12/15/2024	4,810,000 shares	$954.98 million	+20.6%	5.1%	2.7	$198.54
11/30/2024	3,990,000 shares	$824.29 million	+3.9%	4.2%	2.2	$206.59
11/15/2024	3,840,000 shares	$773.64 million	-11.1%	4.1%	2.1	$201.47
10/31/2024	4,320,000 shares	$781.01 million	-10.7%	4.6%	2.4	$180.79
10/15/2024	4,840,000 shares	$944.57 million	-0.2%	5.1%	2.7	$195.16
9/30/2024	4,850,000 shares	$829.06 million	-6.6%	5.2%	2.6	$170.94
9/15/2024	5,190,000 shares	$882.61 million	+25.4%	5.6%	2.7	$170.06
8/31/2024	4,140,000 shares	$827.92 million	-7.4%	4.5%	2	$199.98
8/15/2024	4,470,000 shares	$850.82 million	-0.2%	4.8%	2.2	$190.34
7/31/2024	4,480,000 shares	$803.49 million	+0.5%	4.8%	2.1	$179.35
7/15/2024	4,460,000 shares	$911.94 million	-7.5%	4.9%	2.1	$204.47
6/30/2024	4,820,000 shares	$926.36 million	-5.1%	5.3%	2.3	$192.19
6/15/2024	5,080,000 shares	$935.84 million	+0.8%	5.6%	2.5	$184.22
5/31/2024	5,040,000 shares	$856.60 million	+7.2%	5.6%	2.5	$169.96
5/15/2024	4,700,000 shares	$851.31 million	+11.1%	5.2%	2.2	$181.13
4/30/2024	4,230,000 shares	$731.54 million	-23.2%	4.7%	1.8	$172.94
4/15/2024	5,510,000 shares	$963.42 million	+3.8%	6.2%	2.4	$174.85
3/31/2024	5,310,000 shares	$1.02 billion	+16.5%	6.0%	2.2	$192.63
3/15/2024	4,560,000 shares	$884.78 million	+6.5%	5.2%	2	$194.03
2/29/2024	4,280,000 shares	$1.04 billion	-4.3%	4.8%	1.8	$241.97
2/15/2024	4,470,000 shares	$1.13 billion	-15.5%	5.1%	2	$253.16
1/31/2024	5,290,000 shares	$1.25 billion	+3.9%	6.0%	2.6	$235.67
1/15/2024	5,090,000 shares	$1.17 billion	-2.7%	5.8%	2.5	$230.77

12/31/2023	5,230,000 shares	$1.16 billion	-6.4%	6.0%	2.6	$221.56
12/15/2023	5,590,000 shares	$1.24 billion	-6.4%	6.4%	2.8	$221.66
11/30/2023	5,970,000 shares	$1.18 billion	+0.5%	6.8%	3.1	$197.53
11/15/2023	5,940,000 shares	$1.10 billion	+6.5%	6.8%	3.3	$184.56
10/31/2023	5,580,000 shares	$885.49 million	+9.0%	6.4%	3.3	$158.69
10/15/2023	5,120,000 shares	$862.82 million	+1.4%	5.9%	2.8	$168.52
9/30/2023	5,050,000 shares	$785.73 million	-5.4%	5.8%	2.4	$155.59
9/15/2023	5,340,000 shares	$833.57 million	-7.3%	6.3%	2.6	$156.10
8/31/2023	5,760,000 shares	$898.85 million	-5.9%	6.8%	2.5	$156.05
8/15/2023	6,120,000 shares	$873.39 million	+6.8%	7.2%	2.5	$142.71
7/31/2023	5,730,000 shares	$918.98 million	-14.5%	6.7%	1.9	$160.38
7/15/2023	6,700,000 shares	$974.38 million	-1.9%	7.9%	2.1	$145.43
6/30/2023	6,830,000 shares	$999.23 million	-5.4%	8.0%	2.3	$146.30
6/15/2023	7,220,000 shares	$1.14 billion	+0.8%	8.5%	2.4	$158.34
5/31/2023	7,160,000 shares	$970.04 million	-10.6%	8.4%	2.3	$135.48
5/15/2023	8,010,000 shares	$967.69 million	-4.2%	9.5%	2.6	$120.81
4/30/2023	8,360,000 shares	$753.24 million	+9.9%	9.7%	2.9	$90.10
4/15/2023	7,610,000 shares	$802.47 million	+6.7%	8.8%	2.9	$105.45
3/31/2023	7,130,000 shares	$833.00 million	+0.4%	8.3%	2.6	$116.83
3/15/2023	7,100,000 shares	$764.46 million	+6.0%	8.2%	2.6	$107.67
2/28/2023	6,700,000 shares	$878.71 million	-1.0%	7.8%	2.4	$131.15
2/15/2023	6,770,000 shares	$966.55 million	-22.4%	7.9%	2.7	$142.77
1/31/2023	8,720,000 shares	$1.08 billion	-0.5%	10.2%	3.3	$124.16
1/15/2023	8,760,000 shares	$939.95 million	+9.0%	10.2%	3.4	$107.30
12/30/2022	8,040,000 shares	$899.68 million	+5.8%	9.4%	3.2	$111.90
12/15/2022	7,600,000 shares	$890.49 million	+25.8%	8.9%	3.1	$117.17
11/30/2022	6,040,000 shares	$806.04 million	-2.1%	7.2%	2.2	$133.45
11/15/2022	6,170,000 shares	$908.59 million	-7.6%	7.3%	2.5	$147.26
10/31/2022	6,680,000 shares	$1.03 billion	+6.5%	7.9%	2.7	$154.10
10/15/2022	6,270,000 shares	$848.39 million	-9.4%	7.4%	2.6	$135.31
9/30/2022	6,920,000 shares	$1.14 billion	-1.3%	8.2%	3	$164.37
9/15/2022	7,010,000 shares	$1.23 billion	+16.5%	8.4%	3	$175.99
8/31/2022	6,020,000 shares	$958.62 million	-5.2%	7.2%	2.7	$159.24
8/15/2022	6,350,000 shares	$1.15 billion	+3.6%	7.6%	2.8	$181.71
7/31/2022	6,130,000 shares	$950.52 million	+7.2%	7.3%	2.4	$155.06
7/15/2022	5,720,000 shares	$854.11 million	-2.7%	6.9%	2.3	$149.32
6/30/2022	5,880,000 shares	$879.12 million	-11.3%	7.1%	2.4	$149.51
6/15/2022	6,630,000 shares	$982.90 million	-12.2%	8.0%	2.7	$148.25
5/31/2022	7,550,000 shares	$1.16 billion	+2.3%	9.1%	3	$153.09
5/15/2022	7,380,000 shares	$1.13 billion	+35.7%	8.9%	2.6	$153.23
4/30/2022	5,440,000 shares	$1.10 billion	-2.9%	6.6%	2.1	$202.74
4/15/2022	5,600,000 shares	$1.29 billion	-1.4%	6.8%	2.1	$230.84
3/31/2022	5,680,000 shares	$1.37 billion	+6.8%	6.9%	2	$241.28
3/15/2022	5,320,000 shares	$1.05 billion	-6.2%	6.5%	1.9	$196.61
2/28/2022	5,670,000 shares	$1.36 billion	-4.4%	7.0%	1.9	$239.15
2/15/2022	5,930,000 shares	$1.69 billion	-1.3%	7.3%	2.1	$285.82
1/31/2022	6,010,000 shares	$1.55 billion	-17.6%	7.4%	2.3	$257.11
1/15/2022	7,290,000 shares	$1.86 billion	-8.2%	9.0%	3	$254.74
12/31/2021	7,940,000 shares	$2.55 billion	-4.1%	9.8%	3.6	$321.33
12/15/2021	8,280,000 shares	$2.54 billion	+17.8%	10.2%	3.8	$307.24

11/30/2021	7,030,000 shares	$2.44 billion	-7.1%	8.7%	3.5	$346.97
11/15/2021	7,570,000 shares	$2.62 billion	+5.6%	9.5%	4.2	$345.80
10/29/2021	7,170,000 shares	$2.29 billion	+4.4%	9.0%	4.3	$318.86
10/15/2021	6,870,000 shares	$2.01 billion	+13.7%	8.6%	4.3	$292.70
9/30/2021	6,040,000 shares	$1.58 billion	-4.4%	7.6%	3.8	$262.22
9/15/2021	6,320,000 shares	$1.73 billion	-4.0%	8.0%	4.1	$273.44
8/31/2021	6,580,000 shares	$1.83 billion	+1.7%	8.5%	4.3	$278.34
8/13/2021	6,470,000 shares	$1.59 billion	-2.9%	8.3%	4	$245.15
7/30/2021	6,660,000 shares	$1.57 billion	+2.2%	8.5%	3.8	$235.91
7/15/2021	6,520,000 shares	$1.43 billion	-1.7%	8.5%	3.5	$219.31
6/30/2021	6,630,000 shares	$1.43 billion	+0.9%	8.6%	3.5	$216.06
6/15/2021	6,570,000 shares	$1.36 billion	+10.4%	8.6%	3.4	$207.39
5/28/2021	5,950,000 shares	$1.16 billion	+2.8%	7.8%	3	$194.20
5/14/2021	5,790,000 shares	$931.73 million	+11.1%	7.5%	3	$160.92
4/30/2021	5,210,000 shares	$975.73 million	+3.2%	6.8%	2.7	$187.28
4/15/2021	5,050,000 shares	$971.57 million	+15.8%	6.6%	2.6	$192.39
3/31/2021	4,360,000 shares	$722.84 million	-5.6%	5.7%	2.1	$165.79
3/15/2021	4,620,000 shares	$852.90 million	+6.9%	6.1%	2.1	$184.61
2/26/2021	4,320,000 shares	$845.81 million	-6.1%	5.8%	1.7	$195.79
2/12/2021	4,600,000 shares	$1.03 billion	+9.0%	6.1%	2	$222.89
1/29/2021	4,220,000 shares	$870.50 million	-21.3%	5.6%	1.8	$206.28
1/15/2021	5,360,000 shares	$1.12 billion	-21.6%	7.1%	2.2	$209.87
12/31/2020	6,840,000 shares	$1.38 billion	+4.1%	9.1%	2.9	$201.31
12/15/2020	6,570,000 shares	$1.21 billion	-11.9%	8.8%	2.9	$183.45
11/30/2020	7,460,000 shares	$1.12 billion	-6.3%	10.0%	3.2	$149.74
10/30/2020	7,610,000 shares	$1.08 billion	+1.5%	10.4%	3.4	$142.56
10/15/2020	7,500,000 shares	$1.16 billion	+1.6%	10.2%	3.2	$155.09
9/30/2020	7,380,000 shares	$1.04 billion	-6.0%	10.2%	3	$140.69

ZS Short Interest - Frequently Asked Questions

What is Zscaler's current short interest?: Short interest is the volume of Zscaler shares that have been sold short but have not yet been covered or closed out. As of August 31st, traders have sold 5,650,000 shares of ZS short. 5.78% of Zscaler's shares are currently sold short. Learn More on Zscaler's current short interest.
What is a good short interest ratio for Zscaler?: The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. ZS shares currently have a short interest ratio of 3.0. Learn More on Zscaler's short interest ratio.
Which institutional investors are shorting Zscaler?: As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Zscaler: Wolverine Trading LLC, Nomura Holdings Inc., Sculptor Capital LP, Man Group plc, LMR Partners LLP, Group One Trading LLC, BNP Paribas Financial Markets, Balyasny Asset Management L.P., Bank of America Corp DE, Jane Street Group LLC, Volterra Technologies LP, Squarepoint Ops LLC, Alphadyne Asset Management LP, Qube Research & Technologies Ltd, Maven Securities LTD, Walleye Capital LLC, Walleye Trading LLC, Lido Advisors LLC, Capital Fund Management S.A., Sumitomo Mitsui Financial Group Inc., Eisler Capital Management Ltd., JPMorgan Chase & Co., SG Americas Securities LLC, Garda Capital Partners LP, Credit Industriel ET Commercial, Simplex Trading LLC, Twin Tree Management LP, Credit Industriel ET Commercial, and ADAPT Investment Managers SA. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.
What is a good short interest percentage for Zscaler?: Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 5.78% of Zscaler's floating shares are currently sold short.
Is Zscaler's short interest increasing or decreasing?: Zscaler saw a decline in short interest in the month of August. As of August 31st, there was short interest totaling 5,650,000 shares, a decline of 5.4% from the previous total of 5,970,000 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.
What is Zscaler's float size?: Zscaler currently has issued a total of 158,301,000 shares. Some of Zscaler's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Zscaler currently has a public float of 97,740,000 shares.

How does Zscaler's short interest compare to its competitors?: 5.78% of Zscaler's shares are currently sold short. Here is how the short interest of companies compare to Zscaler: CrowdStrike (2.88%), CyberArk Software Ltd. (4.13%), Datadog, Inc. (4.15%), Palo Alto Networks, Inc. (7.54%), HubSpot, Inc. (2.67%), Cloudflare, Inc. (3.06%), ServiceNow, Inc. (1.64%), NetEase, Inc. (0.34%), Roblox Corporation (2.99%), Snowflake Inc. (4.15%),
Which stocks are the most shorted right now?: As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($73.23 billion), Invesco QQQ ($29.52 billion), iShares Russell 2000 ETF ($20.82 billion), iShares 20+ Year Treasury Bond ETF ($10.76 billion), Palo Alto Networks, Inc. ($9.37 billion), Strategy Inc ($7.58 billion), Invesco S&P 500 Equal Weight ETF ($6.78 billion), SPDR S&P Biotech ETF ($6.72 billion), AppLovin Corporation ($6.37 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($6.29 billion). View all of the most shorted stocks.
What does it mean to sell short Zscaler stock?: Short selling ZS is an investing strategy that aims to generate trading profit from Zscaler as its price is falling. ZS shares are trading up $7.99 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.
How does a short squeeze work against Zscaler?: A short squeeze for Zscaler occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of ZS, which in turn drives the price of the stock up even further.
How often is Zscaler's short interest reported?: Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including ZS, twice per month. The most recent reporting period available is August, 31 2025.

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This page (NASDAQ:ZS) was last updated on 9/29/2025 by MarketBeat.com Staff

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Zscaler (ZS) Short Interest Ratio & Short Volume