Zscaler, Inc. (ZS) Ownership
ZS ownership summary
as of October 18, 2026- Institutions
- 53.3% of shares outstanding
- Insiders
- 34.67% of shares outstanding
- Shares outstanding
- 163.1M
- Float
- 106.5M shares available to trade
- Short interest
- 5.44% 5.8M shares short
- Days to cover
- 1.52 short interest down 10.8% vs prior month
- Institutions 53.26%
- Insiders 34.67%
- Other investors 12.08%
ZS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 6.07% | 9.9M | $2.05B | +1.3M (+15.4%) | June 30, 2026 |
| 2 | Vanguard Portfolio Management, LLC | 3.80% | 6.2M | $1.29B | +266,091 (+4.5%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 2.90% | 4.7M | $979.1M | +60,503 (+1.3%) | June 30, 2026 |
| 4 | First Trust Advisors L.P. | 2.16% | 3.5M | $731.9M | +10,535 (+0.3%) | June 30, 2026 |
| 5 | The Goldman Sachs Group Inc | 1.94% | 3.2M | $655.6M | +236,609 (+8.1%) | June 30, 2026 |
| 6 | State Street Corp | 1.53% | 2.5M | $517.1M | +109,154 (+4.6%) | June 30, 2026 |
| 7 | Pictet Asset Manangement SA | 1.29% | 2.1M | $436.5M | +184,081 (+9.6%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 1.28% | 2.1M | $433.6M | +3,814 (+0.2%) | June 30, 2026 |
| 9 | UBS Asset Mgmt Americas Inc | 1.06% | 1.7M | $359.0M | −233,924 (−11.9%) | June 30, 2026 |
| 10 | Victory Capital Management Inc. | 1.03% | 1.7M | $347.4M | +119,904 (+7.7%) | June 30, 2026 |
| 11 | AQR Capital Management LLC | 0.84% | 1.4M | $282.7M | +347,340 (+34.2%) | June 30, 2026 |
| 12 | Jericho Capital Asset Management LP | 0.84% | 1.4M | $282.6M | +1.4M (0.0%) | June 30, 2026 |
| 13 | Amundi | 0.70% | 1.1M | $236.0M | +129,563 (+12.8%) | June 30, 2026 |
| 14 | Morgan Stanley - Brokerage Accounts | 0.70% | 1.1M | $235.7M | −145,166 (−11.3%) | June 30, 2026 |
| 15 | Millennium Management LLC | 0.69% | 1.1M | $234.3M | +794,787 (+237.3%) | June 30, 2026 |
| 16 | Wellington Management Company LLP | 0.68% | 1.1M | $228.8M | +209,711 (+23.5%) | June 30, 2026 |
| 17 | Citadel Advisors Llc | 0.62% | 1.0M | $209.2M | +497,738 (+97.4%) | June 30, 2026 |
| 18 | Barclays PLC | 0.58% | 952K | $197.3M | +282,346 (+42.2%) | June 30, 2026 |
| 19 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | 0.54% | 882K | $183.0M | +454,562 (+106.3%) | June 30, 2026 |
| 20 | American Century Companies Inc | 0.53% | 866K | $179.7M | −1.5M (−63.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 17 holders added 6.4M shares and 3 cut 1.9M.
ZS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.05% | 3.3M | $693.1M | −3,808 (−0.1%) | August 31, 2026 |
| 2 | First Trust NASDAQ Cybersecurity ETF | 1.92% | 3.1M | $647.6M | — | September 30, 2026 |
| 3 | Vanguard MStar Mid Cap Index Instl | 1.38% | 2.3M | $466.8M | −22,858 (−1.0%) | September 30, 2026 |
| 4 | Vanguard MStar Growth Index Investor | 1.03% | 1.7M | $349.0M | +67,706 (+4.2%) | September 30, 2026 |
| 5 | Pictet-Security I USD | 0.92% | 1.5M | $310.5M | −119,940 (−7.4%) | July 31, 2026 |
| 6 | Vanguard Information Technology ETF | 0.60% | 974K | $202.0M | +2,241 (+0.2%) | September 30, 2026 |
| 7 | Vanguard MStar Mid Cap Growth ETF | 0.51% | 825K | $171.1M | +17,718 (+2.2%) | September 30, 2026 |
| 8 | Amplify Cybersecurity ETF | 0.45% | 729K | $151.1M | +3,951 (+0.5%) | September 30, 2026 |
| 9 | Vanguard Windsor Investor Shares | 0.43% | 708K | $146.8M | +126,492 (+21.8%) | June 30, 2026 |
| 10 | iShares Russell Mid-Cap Growth ETF | 0.36% | 588K | $121.9M | −627 (−0.1%) | September 30, 2026 |
| 11 | Victory Pioneer A | 0.34% | 562K | $116.5M | −116,625 (−17.2%) | August 31, 2026 |
| 12 | Global X Cybersecurity ETF | 0.34% | 560K | $116.2M | +2,480 (+0.4%) | September 30, 2026 |
| 13 | iShares Expanded Tech-Software Sect ETF | 0.31% | 511K | $106.0M | +4,850 (+1.0%) | September 30, 2026 |
| 14 | Fidelity Extended Market Index | 0.31% | 502K | $104.1M | −5,445 (−1.1%) | August 31, 2026 |
| 15 | Amundi Fds US Pioneer A USD C | 0.27% | 440K | $91.2M | −159,355 (−26.6%) | August 31, 2026 |
| 16 | iShares Russell Mid-Cap ETF | 0.26% | 432K | $89.5M | +798 (+0.2%) | September 30, 2026 |
| 17 | Fidelity Mid Cap Index | 0.25% | 407K | $84.5M | +11,631 (+2.9%) | August 31, 2026 |
| 18 | First Trust Nasdaq Cybscty ETF A USD Acc | 0.25% | 406K | $84.2M | — | September 30, 2026 |
| 19 | iShares Digital Security ETF USD Acc | 0.25% | 400K | $82.9M | — | September 30, 2026 |
| 20 | iShares Russell 1000 Growth ETF | 0.24% | 392K | $81.3M | −266 (−0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ZS insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-18 | James A Beer | Sell | $153.53 | 177 | $27,175 |
| 2026-03-18 | Adam Geller | Sell | $153.53 | 2,094 | $321,492 |
| 2026-03-17 | Adam Geller | Sell | $156.59 | 1,485 | $232,536 |
| 2026-03-17 | Jagtar Singh Chaudhry | Sell | $156.59 | 1,941 | $303,941 |
| 2026-03-17 | Kevin Rubin | Sell | $156.59 | 1,682 | $263,384 |
| 2026-03-17 | Raj Judge | Sell | $156.59 | 2,488 | $389,596 |
| 2026-03-17 | Robert Schlossman | Sell | $156.59 | 2,263 | $354,363 |
| 2026-01-02 | James A Beer | Sell | $226.72 | 653 | $148,048 |
| 2025-12-17 | Adam Geller | Sell | $232.79 | 1,620 | $377,120 |
| 2025-12-17 | Robert Schlossman | Sell | $232.79 | 2,349 | $546,824 |
| 2025-12-16 | Adam Geller | Sell | $230.82 | 2,060 | $475,489 |
| 2025-12-16 | Jagtar Singh Chaudhry | Sell | $230.82 | 2,843 | $656,221 |
| 2025-12-16 | Kevin Rubin | Sell | $230.82 | 3,303 | $762,398 |
| 2025-12-16 | Raj Judge | Sell | $230.82 | 3,438 | $793,559 |
| 2025-12-16 | Robert Schlossman | Sell | $230.82 | 3,084 | $711,849 |
| 2025-10-24 | Robert Schlossman | Sell | $325.00 | 3,200 | $1.0M |
| 2025-10-02 | Robert Schlossman | Sell | $305.57 | 7,006 | $2.1M |
| 2025-09-17 | Adam Geller | Sell | $284.25 | 10,464 | $3.0M |
| 2025-09-16 | Adam Geller | Sell | $280.70 | 11,193 | $3.1M |
| 2025-09-16 | Jagtar Singh Chaudhry | Sell | $280.70 | 2,865 | $804,206 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ZS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ZS
Institutional investors own 53.3% of Zscaler's shares and insiders 34.67%. The largest holder is BlackRock Inc with 6.07% of the shares (9.9M), as of June 30, 2026. Among the top 20 institutions, 17 added shares and 3 reduced their stake in the latest filings. Short interest is 5.44% of the float, or 1.52 days of average trading volume. The share count rose 560.8% since 2015.
Related: ZS analyst forecast, ZS key metrics. See the ZS stock overview for the latest quote and news.
ZS ownership FAQ
Who owns the most Zscaler stock?
The largest shareholders of Zscaler are BlackRock Inc (6.07%), Vanguard Portfolio Management, LLC (3.80%), Vanguard Capital Management, LLC (2.90%), First Trust Advisors L.P. (2.16%), The Goldman Sachs Group Inc (1.94%).
What percentage of Zscaler is owned by institutions?
Institutions hold 53.3% of Zscaler's shares outstanding; insiders hold 34.67%.
Which funds own Zscaler?
The largest fund holders of Zscaler are Vanguard MStar Total Stk Mkt Idx Invest (2.05%), First Trust NASDAQ Cybersecurity ETF (1.92%), Vanguard MStar Mid Cap Index Instl (1.38%), Vanguard MStar Growth Index Investor (1.03%), Pictet-Security I USD (0.92%).
What is Zscaler's short interest?
5.8M shares of Zscaler were sold short, 5.44% of the float; at the average daily volume it would take 1.52 days to cover.
Are insiders buying or selling Zscaler?
Of the latest 20 reported insider transactions in Zscaler (since September 16, 2025), 0 were purchases and 20 were sales.
How many shares of Zscaler are outstanding?
Zscaler has 163.1M shares outstanding, of which 106.5M are in the public float.