Comparable stake leader
Ajay Mangal
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
31 Mar 2026
- Symbol
- ZS on Nasdaq
- SEC evidence covered
- 3/4/5 and 13F
- Largest SEC-reported holder
- Ajay Mangal
- Latest parsed evidence date
- 31 Mar 2026
- CIK
- 0001713683
- Location
- San Jose, CA
Ownership snapshot
1 signal
Issuer
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
Ajay Mangal
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
3/4/5
13F
Lead comparable stake: 1.6%
Showing 1-8 of 50 holder rows.
Quick read
Ajay Mangal leads the comparable SEC ownership view at 1.6%.
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.
Comparable ownership
Top 5
Ajay Mangal
1.6%
Jagtar Singh Chaudhry
0.22%
Charles H. Giancarlo
0.17%
Karen Blasing
0.04%
Raj Judge
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 |
|---|---|---|---|---|---|
| Ajay Mangal |
3/4/5
10%+ Owner
|
1.6%
|
$770,458,734
2,550,210 shares
|
-$36,106,497 | 09 Jun 2025 |
| Jagtar Singh Chaudhry |
3/4/5
CEO & Chairman, Director, 10%+ Owner
|
0.22%
|
$55,123,197
352,582 shares
|
-$2,629,613 | 17 Mar 2026 |
| Charles H. Giancarlo |
3/4/5
Director
|
0.17%
|
$60,829,838
270,451 shares
|
-$20,416,445 | 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
|
-$3,351,088 | 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
|
-$6,033,118 | 12 Jan 2026 |
| Eileen Naughton |
3/4/5
Director
|
0%
|
$1,742,005
7,745 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: -$98,901,869.
Buys
$0
Insiders: 0
Sells
$98,901,869
Insiders: 11
Net
-$98,901,869
Shares: -343,887
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 343,887
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 15,277 | $0 | $2,385,318 | -$2,385,318 |
| 3-6 | 0 | 23,450 | $0 | $5,417,857 | -$5,417,857 |
| 6-9 | 0 | 54,802 | $0 | $15,736,032 | -$15,736,032 |
| 9-12 | 0 | 250,358 | $0 | $75,362,662 | -$75,362,662 |
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
-$98,901,870
Latest report
18 Mar 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Ajay Mangal | 10%+ Owner | $770,458,734 | -$36,106,497 | -4.5% | Filing P/S | 09 Jun 2025 |
| Charles H. Giancarlo | Director | $60,829,838 | -$20,416,445 | -25% | Mixed | 12 Jan 2026 |
| Dali Rajic | Chief Operating Officer | $55,214,240 | Mixed | 18 Dec 2023 | ||
| Jagtar Singh Chaudhry | CEO & Chairman, Director, 10%+ Owner | $55,123,197 | -$2,629,613 | -4.6% | Mixed | 17 Mar 2026 |
| Amit Sinha | Director | $45,904,716 | Mixed | 28 Dec 2023 | ||
| Remo Canessa | Chief Financial Officer | $42,557,728 | Filing P/S | 18 Mar 2025 | ||
| Syam Nair | Cto | $32,392,562 | -$1,234,245 | -3.7% | Filing P/S | 17 Jun 2025 |
| Michael J. Rich | CRO and President of WW Sales | $16,340,500 | -$9,056,408 | -36% | Filing P/S | 17 Mar 2026 |
| Karen Blasing | Director | $15,380,254 | Mixed | 12 Jan 2026 | ||
| Robert Schlossman | Chief Legal Officer | $11,348,925 | -$9,313,512 | -45% | Mixed | 17 Mar 2026 |
| Scott C. Darling | Director | $10,959,306 | Mixed | 12 Jan 2026 | ||
| Raj Judge | EVP, Corp. Strategy & Ventures, Director | $10,633,617 | -$3,351,088 | -24% | Filing P/S | 17 Mar 2026 |
| Kevin Rubin | Chief Financial Officer | $7,278,295 | -$1,025,786 | -12% | Filing P/S | 17 Mar 2026 |
| Adam Geller | Chief Product Officer | $7,208,079 | -$9,559,935 | -57% | Filing P/S | 17 Mar 2026 |
| David Schneider | Director | $5,603,207 | Mixed | 12 Jan 2026 | ||
| Andrew William Fraser Brown | Director | $5,238,836 | -$6,033,118 | -54% | Mixed | 12 Jan 2026 |
| Eileen Naughton | Director | $1,742,005 | Mixed | 12 Jan 2026 | ||
| James A. Beer | Director | $673,075 | -$175,223 | -21% | Filing P/S | 18 Mar 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||
| Adam Geller | ZS | Commom Stock | Award | 39.1% | 18,322 | 65,135 | 15 Sep 2025 | Direct | ||
| Robert Schlossman | ZS | Common Stock | Gift | -2.25% | -2,000 | 86,970 | 15 Sep 2025 | Direct | ||
| Robert Schlossman | ZS | Common Stock | Sale | -3.44% | $968,300 | $305.07 | -3,174 | 88,970 | 18 Jun 2025 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -7.26% | $1,123,198 | $306.72 | -3,662 | 46,813 | 18 Jun 2025 | Direct |
| Jagtar Singh Chaudhry | ZS | Common Stock | Sale | -0.8% | $865,247 | $303.70 | -2,849 | 353,565 | 17 Jun 2025 | Direct |
| Syam Nair | ZS | Commom Stock | Sale | -3.67% | $1,234,245 | $303.70 | -4,064 | 106,659 | 17 Jun 2025 | Direct |
| Robert Schlossman | ZS | Common Stock | Sale | -3.75% | $1,090,291 | $303.70 | -3,590 | 92,144 | 17 Jun 2025 | Direct |
| Raj Judge | ZS | Common Stock | Sale | -3.73% | $898,047 | $303.70 | -2,957 | 76,289 | 17 Jun 2025 | Direct |
| Michael J. Rich | ZS | Commom Stock | Sale | -4.18% | $1,301,971 | $303.70 | -4,287 | 98,203 | 17 Jun 2025 | Direct |
| Adam Geller | ZS | Commom Stock | Sale | -5.63% | $913,840 | $303.70 | -3,009 | 50,475 | 17 Jun 2025 | Direct |
| Michael J. Rich | ZS | Commom Stock | Sale | -8.89% | $3,026,063 | $302.88 | -9,991 | 102,400 | 12 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.