Zscaler officer Adam Geller to sell 661 shares

Officer Adam Geller has filed a Rule 144 notice to sell 661 Zscaler common shares, following several prior sales in the past three months.

Rhea-AI Filing Summary

Zscaler, Inc. (ZS) received a notice under Rule 144 that officer Adam Geller intends to sell common stock. The notice lists 661 shares of common stock, acquired as Performance Shares from the issuer on September 15, 2026, as securities to be sold, with Morgan Stanley Smith Barney LLC as broker. The filing also lists several prior open-market sales of Zscaler common stock by Geller during the past three months.

Key Figures

Shares to be sold: 661 shares Aggregate market value: $132,200.00 Prior sale on September 17, 2026: 4,584 shares for $880,173.84 +4 more

7 metrics

Shares to be sold 661 shares Common stock listed as securities to be sold under Rule 144

Aggregate market value $132,200.00 Aggregate market value listed with the 661 shares

Prior sale on September 17, 2026 4,584 shares for $880,173.84 Common stock sold by Adam Geller in the past three months

Prior sale on September 16, 2026 5,578 shares for $1,075,230.90 Common stock sold by Adam Geller in the past three months

Prior sale on June 22, 2026 2,817 shares for $345,364.20 Common stock sold by Adam Geller in the past three months

Shares outstanding reference 163,054,698 shares Share count figure listed in the securities information section

Form 144 signature date September 21, 2026 Date of /s/ Adam Geller signature

Key Terms

Rule 144, Performance Shares, aggregate market value, Issuer

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Performance Shares financial

"Common | 09/15/2026 | Performance Shares | ISSUER"

Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.

aggregate market value financial

"Common ... | 661 | 132200.00 | 163054698"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Issuer regulatory

"Performance Shares | ISSUER"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for ZS?

It discloses that officer Adam Geller has filed a Rule 144 notice to sell 661 shares of Zscaler common stock, acquired as performance shares on September 15, 2026, using Morgan Stanley Smith Barney LLC as broker.

How many Zscaler (ZS) shares are planned to be sold under this Form 144?

The notice lists 661 shares of Zscaler common stock as the securities to be sold, acquired as Performance Shares from the issuer on September 15, 2026.

What prior Zscaler (ZS) stock sales by Adam Geller are reported?

The filing reports prior sales of 4,584 shares for $880,173.84 on September 17, 2026; 5,578 shares for $1,075,230.90 on September 16, 2026; and 2,817 shares for $345,364.20 on June 22, 2026.

Who is the broker for Adam Geller’s planned Zscaler (ZS) share sale?

The broker listed is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004.

What is the aggregate market value reported in the ZS Form 144?

The securities information section lists an aggregate market value of $132,200.00 in connection with the Zscaler common stock referenced in the Form 144.

When was the Zscaler (ZS) Form 144 notice signed by Adam Geller?

The remarks and signature section shows a signature by /s/ Adam Geller dated September 21, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/21/2026 - 04:04 PM Accepted by SEC EDGAR 09/21/2026 - 04:03 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002040014
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ZSCALER, INC.
SEC File Number	001-38413
Address of Issuer	120 Holger Way San Jose CALIFORNIA 95134
Phone	(408) 533-0288
Name of Person for Whose Account the Securities are To Be Sold	ADAM GELLER
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	661	132200.00	163054698	09/21/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/15/2026	Performance Shares	ISSUER			661	09/15/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
ADAM GELLER 120 Holger Way San Jose CA 95134	Common	09/17/2026	4584	880173.84
ADAM GELLER 120 Holger Way San Jose CA 95134	Common	09/16/2026	5578	1075230.90
ADAM GELLER 120 Holger Way San Jose CA 95134	Common	06/22/2026	2817	345364.20

144: Remarks and Signature

Remarks
Date of Notice	09/21/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/20/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Adam Geller
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)