Comparable stake leader
BlackRock, Inc.
SEC ownership of Zscaler, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001713683.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- ZS on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001713683
- Issuer location
- San Jose, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Zscaler, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
30 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 5.1%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 5.1%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
5.1%
Ajay Mangal
1.6%
Jagtar Singh Chaudhry
0.22%
Charles H. Giancarlo
0.17%
Karen Blasing
0.04%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
5.1%
from 13D/G
|
$1,396,027,702
9,890,384 shares
|
— | 30 Jun 2026 |
| Ajay Mangal |
3/4/5
10%+ Owner
|
1.6%
|
$770,458,734
2,550,210 shares
|
— | 09 Jun 2025 |
| Jagtar Singh Chaudhry |
3/4/5
CEO & Chairman, Director, 10%+ Owner
|
0.22%
|
$44,305,295
349,704 shares
|
-$2,128,229 | 16 Jun 2026 |
| Charles H. Giancarlo |
3/4/5
Director
|
0.17%
|
$60,829,838
270,451 shares
|
— | 12 Jan 2026 |
| Karen Blasing |
3/4/5
Director
|
0.04%
|
$15,380,254
68,381 shares
|
— | 12 Jan 2026 |
| Raj Judge |
3/4/5
EVP, Corp. Strategy & Ventures, Director
|
0.04%
|
$10,633,617
67,906 shares
|
-$2,453,041 | 17 Mar 2026 |
| David Schneider |
3/4/5
Director
|
0.02%
|
$5,603,207
24,912 shares
|
— | 12 Jan 2026 |
| Andrew William Fraser Brown |
3/4/5
Director
|
0.01%
|
$5,238,836
23,292 shares
|
— | 12 Jan 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$26,207,993.
Buys
$0
Insiders: 0
Sells
$26,207,993
Insiders: 7
Net
-$26,207,993
Shares: -114,485
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 114,485
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 20,956 | $0 | $2,668,786 | -$2,668,786 |
| 3-6 | 0 | 15,277 | $0 | $2,385,318 | -$2,385,318 |
| 6-9 | 0 | 23,450 | $0 | $5,417,857 | -$5,417,857 |
| 9-12 | 0 | 54,802 | $0 | $15,736,032 | -$15,736,032 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-18 of 18 reporting-owner rows connected to Zscaler, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
18
Largest Forms 3/4/5 holder
Ajay Mangal
Net 12M change
-$26,207,993
Latest report
25 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Ajay Mangal | 10%+ Owner | $770,458,734 | Filing P/S | 09 Jun 2025 | ||
| Charles H. Giancarlo | Director | $60,829,838 | Mixed | 12 Jan 2026 | ||
| Dali Rajic | Chief Operating Officer | $55,214,240 | Mixed | 18 Dec 2023 | ||
| Amit Sinha | Director | $45,904,716 | Mixed | 28 Dec 2023 | ||
| Jagtar Singh Chaudhry | CEO & Chairman, Director, 10%+ Owner | $44,305,295 | -$2,128,229 | -4.6% | Mixed | 16 Jun 2026 |
| Remo Canessa | Chief Financial Officer | $42,557,728 | Filing P/S | 18 Mar 2025 | ||
| Syam Nair | Cto | $32,392,562 | Filing P/S | 17 Jun 2025 | ||
| Karen Blasing | Director | $15,380,254 | Mixed | 12 Jan 2026 | ||
| Michael J. Rich | CRO and President of WW Sales | $12,681,005 | -$5,257,355 | -29% | Filing P/S | 16 Jun 2026 |
| Scott C. Darling | Director | $10,959,306 | Mixed | 12 Jan 2026 | ||
| Adam Geller | Chief Product Officer | $10,893,585 | -$8,113,535 | -43% | Filing P/S | 22 Jun 2026 |
| Raj Judge | EVP, Corp. Strategy & Ventures, Director | $10,633,617 | -$2,453,041 | -19% | Filing P/S | 17 Mar 2026 |
| Robert Schlossman | Chief Legal Officer | $10,399,744 | -$6,285,569 | -38% | Mixed | 06 Jul 2026 |
| Kevin Rubin | Chief Financial Officer | $7,217,558 | -$1,772,828 | -20% | Filing P/S | 25 Aug 2026 |
| David Schneider | Director | $5,603,207 | Mixed | 12 Jan 2026 | ||
| Andrew William Fraser Brown | Director | $5,238,836 | Mixed | 12 Jan 2026 | ||
| Eileen Naughton | Director | $1,742,005 | Mixed | 12 Jan 2026 | ||
| James A. Beer | Director | $527,978 | -$197,436 | -27% | Filing P/S | 17 Jun 2026 |
Recent insider transactions for Zscaler, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Kevin Rubin | ZS | Common Stock | Sale | -1.22% | $87,210 | $173.38 | -503 | 40,895 | 25 Aug 2026 | Direct |
| Kevin Rubin | ZS | Common Stock | Sale | -1.2% | $74,002 | $147.12 | -503 | 41,398 | 27 Jul 2026 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -0.18% | $18,300 | $150.00 | -122 | 69,244 | 06 Jul 2026 | Direct |
| Kevin Rubin | ZS | Common Stock | Sale | -6.68% | $372,669 | $124.22 | -3,000 | 41,901 | 25 Jun 2026 | Direct |
| Adam Geller | ZS | Common Stock | Sale | -6.24% | $345,364 | $122.60 | -2,817 | 42,314 | 22 Jun 2026 | Direct |
| James A. Beer | ZS | Commom Stock | Sale | -4.04% | $22,214 | $125.50 | -177 | 4,207 | 17 Jun 2026 | Direct |
| Jagtar Singh Chaudhry | ZS | Common Stock | Sale | -0.83% | $363,864 | $126.43 | -2,878 | 343,038 | 16 Jun 2026 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -4.12% | $245,273 | $126.43 | -1,940 | 45,131 | 16 Jun 2026 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -4.34% | $397,748 | $126.43 | -3,146 | 69,366 | 16 Jun 2026 | Direct |
| Michael J. Rich | ZS | Commom Stock | Sale | -4% | $528,981 | $126.43 | -4,184 | 100,301 | 16 Jun 2026 | Direct |
| Kevin Rubin | ZS | Common Stock | Sale | -3.62% | $213,160 | $126.43 | -1,686 | 44,901 | 16 Jun 2026 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -4.27% | $321,492 | $153.53 | -2,094 | 46,949 | 18 Mar 2026 | Direct |
| James A. Beer | ZS | Commom Stock | Sale | -3.88% | $27,175 | $153.53 | -177 | 4,384 | 18 Mar 2026 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -2.94% | $232,541 | $156.59 | -1,485 | 49,043 | 17 Mar 2026 | Direct |
| Jagtar Singh Chaudhry | ZS | Common Stock | Sale | -0.56% | $303,947 | $156.59 | -1,941 | 345,916 | 17 Mar 2026 | Direct |
| Kevin Rubin | ZS | Common Stock | Sale | -3.49% | $263,390 | $156.59 | -1,682 | 46,479 | 17 Mar 2026 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -3.03% | $354,370 | $156.59 | -2,263 | 72,390 | 17 Mar 2026 | Direct |
| Michael J. Rich | ZS | Commom Stock | Sale | -2.93% | $492,799 | $156.59 | -3,147 | 104,350 | 17 Mar 2026 | Direct |
| Raj Judge | ZS | Common Stock | Sale | -3.53% | $389,604 | $156.59 | -2,488 | 67,906 | 17 Mar 2026 | Direct |
| Andrew William Fraser Brown | ZS | Common Stock | Award | 4.84% | 1,076 | 23,292 | 12 Jan 2026 | Direct | ||
| Scott C. Darling | ZS | Common Stock | Award | 25.2% | 1,076 | 5,351 | 12 Jan 2026 | Direct | ||
| Charles H. Giancarlo | ZS | Common Stock | Award | 0.75% | 1,076 | 145,451 | 12 Jan 2026 | Direct | ||
| Eileen Naughton | ZS | Common Stock | Award | 16.1% | 1,076 | 7,745 | 12 Jan 2026 | Direct | ||
| David Schneider | ZS | Common Stock | Award | 4.51% | 1,076 | 24,912 | 12 Jan 2026 | Direct | ||
| James A. Beer | ZS | Commom Stock | Award | 30.9% | 1,076 | 4,561 | 12 Jan 2026 | Direct | ||
| Karen Blasing | ZS | Common Stock | Award | 2.58% | 1,076 | 42,757 | 12 Jan 2026 | Direct | ||
| James A. Beer | ZS | Commom Stock | Sale | -15.8% | $148,048 | $226.72 | -653 | 3,485 | 02 Jan 2026 | Direct |
| Andrew William Fraser Brown | ZS | Common Stock | Sale | -18.4% | -5,000 | 22,216 | 26 Dec 2025 | Direct | ||
| Robert Schlossman | ZS | Common Stock | Sale | -3.05% | $546,824 | $232.79 | -2,349 | 74,653 | 17 Dec 2025 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -3.11% | $377,120 | $232.79 | -1,620 | 50,528 | 17 Dec 2025 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -3.85% | $711,847 | $230.82 | -3,084 | 77,002 | 16 Dec 2025 | Direct |
| Michael J. Rich | ZS | Commom Stock | Sale | -3.67% | $946,359 | $230.82 | -4,100 | 107,497 | 16 Dec 2025 | Direct |
| Kevin Rubin | ZS | Common Stock | Sale | -6.42% | $762,396 | $230.82 | -3,303 | 48,161 | 16 Dec 2025 | Direct |
| Jagtar Singh Chaudhry | ZS | Common Stock | Sale | -0.81% | $656,219 | $230.82 | -2,843 | 347,857 | 16 Dec 2025 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -3.8% | $475,488 | $230.82 | -2,060 | 52,148 | 16 Dec 2025 | Direct |
| Raj Judge | ZS | Common Stock | Sale | -4.66% | $793,557 | $230.82 | -3,438 | 70,394 | 16 Dec 2025 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -3.84% | $1,040,000 | $325.00 | -3,200 | 80,086 | 24 Oct 2025 | Direct |
| Robert Schlossman | ZS | Common Stock | Award | 9.4% | 7,154 | 83,286 | 15 Oct 2025 | Direct | ||
| Adam Geller | ZS | Commom Stock | Award | 24.7% | 10,730 | 54,208 | 15 Oct 2025 | Direct | ||
| Michael J. Rich | ZS | Commom Stock | Award | 10.6% | 10,730 | 111,552 | 15 Oct 2025 | Direct | ||
| Robert Schlossman | ZS | Common Stock | Sale | -8.43% | $2,140,851 | $305.57 | -7,006 | 76,132 | 02 Oct 2025 | Direct |
| Jagtar Singh Chaudhry | ZS | Common Stock | Gift | -0.09% | -21,861 | 24,341,267 | 25 Sep 2025 | See Footnote | ||
| Adam Geller | ZS | Commom Stock | Sale | -19.4% | $2,974,406 | $284.25 | -10,464 | 43,478 | 17 Sep 2025 | Direct |
| Michael J. Rich | ZS | Commom Stock | Sale | -10.4% | $3,289,216 | $280.70 | -11,718 | 100,822 | 16 Sep 2025 | Direct |
| Raj Judge | ZS | Common Stock | Sale | -5.77% | $1,269,880 | $280.70 | -4,524 | 73,832 | 16 Sep 2025 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -17.2% | $3,141,850 | $280.70 | -11,193 | 53,942 | 16 Sep 2025 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -4.41% | $1,075,629 | $280.70 | -3,832 | 83,138 | 16 Sep 2025 | Direct |
| Jagtar Singh Chaudhry | ZS | Common Stock | Sale | -0.81% | $804,199 | $280.70 | -2,865 | 350,700 | 16 Sep 2025 | Direct |
| Michael J. Rich | ZS | Commom Stock | Award | 14.6% | 14,337 | 112,540 | 15 Sep 2025 | Direct | ||
| Raj Judge | ZS | Common Stock | Award | 2.71% | 2,067 | 78,356 | 15 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.