Key facts
- This page summarizes Charles H. Giancarlo's Form 4 filing for Zscaler, Inc. (ZS).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 13 Jan 2026, 19:21.
Charles H. Giancarlo - 12 Jan 2026 Form 4 Insider Report for Zscaler, Inc. (ZS)
- Reporting relationship
- Director
- Issuer ticker
- ZS
- Reported as of
- 12 Jan 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 13 Jan 2026, 19:21:44 UTC
- Prior SEC filing
- 06 Jan 2026
- Next SEC filing
- 04 Feb 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Torrie Nute, by power of attorney
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Charles H. Giancarlo filed Form 4 for Zscaler, Inc. (ZS) on 13 Jan 2026.
Change
- Previous filing in this sequence was filed on 06 Jan 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001299634
Primary reporting owner
Giancarlo Charles H
- Relationship
- Director
- Address
- C/O ZSCALER, INC., 120 HOLGER WAY, SAN JOSE
- Signature
- /s/ Torrie Nute, by power of attorney
- Signature date
- 13 Jan 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
ZS
transaction
Common Stock
Award
- Transaction value
- $0
- Shares
- +1,076
- Change %
- +0.75%
- Price
- $0.000000
- Shares after
- 145,451
- Date
- 12 Jan 2026
- Ownership
- Direct
- Footnotes
- F1
ZS
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 8,912
- Date
- 12 Jan 2026
- Ownership
- See footnote
- Footnotes
- F2
ZS
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 8,912
- Date
- 12 Jan 2026
- Ownership
- See footnote
- Footnotes
- F3
ZS
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 125,000
- Date
- 12 Jan 2026
- Ownership
- See footnote
- Footnotes
- F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
The reported shares are represented by restricted stock units, which vest in four equal quarterly installments beginning on March 15, 2026.
Footnote F2
The shares are held of record by The 2012 Gianna Marie Giancarlo Trust UAD 12/26/12 for which the reporting person serves as a trustee.
Footnote F3
The shares are held of record by The 2012 Marielle Christina Giancarlo Trust UAD 12/26/12 for which the reporting person serves as a trustee.
Footnote F4
The shares are held of record by The Charles H. & Dianne G. Giancarlo Family Trust U/D/T 11/2/98 for which the reporting person serves as trustee.