Zscaler officer Adam Geller proposes $5.4M share sale

The notice identifies the proposed shares as acquired from the issuer through a cash-paid stock option exercise on October 9, 2026.

Rhea-AI Filing Summary

Zscaler, Inc. officer Adam Geller gave notice of a proposed sale of 23,958 common shares, with an aggregate market value of $5,400,966.35 and an approximate sale date of October 9, 2026. The notice lists the shares as acquired from the issuer through a stock option exercise for cash on October 9, 2026. It also lists three sales during the preceding three months: 661 shares on September 21, 2026; 4,584 shares on September 17, 2026; and 5,578 shares on September 16, 2026.

Key Figures

Proposed shares for sale: 23,958 shares Aggregate market value: $5,400,966.35 Shares sold: 661 shares +5 more

8 metrics

Proposed shares for sale 23,958 shares Approximate sale date October 9, 2026

Aggregate market value $5,400,966.35 Proposed sale

Shares sold 661 shares September 21, 2026; listed sale value $132,200.00

Listed sale value $132,200.00 661 shares sold September 21, 2026

Shares sold 4,584 shares September 17, 2026; listed sale value $880,173.84

Listed sale value $880,173.84 4,584 shares sold September 17, 2026

Shares sold 5,578 shares September 16, 2026; listed sale value $1,075,230.90

Listed sale value $1,075,230.90 5,578 shares sold September 16, 2026

Key Terms

Rule 144, Stock Option Exercise

2 terms

Rule 144 regulatory

"sales are required by paragraph (e) of Rule 144 to be aggregated"

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.

Stock Option Exercise financial

"Stock Option Exercise"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

FAQ

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

How many Zscaler (ZS) shares did officer Adam Geller propose to sell?

Adam Geller gave notice of a proposed sale of 23,958 common shares, with an aggregate market value of $5,400,966.35. The approximate sale date is October 9, 2026.

How were the shares in Adam Geller’s Zscaler (ZS) notice acquired?

The notice lists 23,958 common shares as acquired from the issuer through a stock option exercise on October 9, 2026, with cash as the payment method.

What recent Zscaler (ZS) sales does Adam Geller’s notice list?

The sales listed for the preceding three months were 661 shares for $132,200.00 on September 21, 2026; 4,584 shares for $880,173.84 on September 17, 2026; and 5,578 shares for $1,075,230.90 on September 16, 2026.

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

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Available on EDGAR 10/09/2026 - 04:37 PM Accepted by SEC EDGAR 10/09/2026 - 04:36 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	4401 GREAT AMERICA PARKWAY Santa Clara CALIFORNIA 95054
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	23958	5400966.35	163054698	10/09/2026	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	10/09/2026	Stock Option Exercise	ISSUER			23958	10/09/2026	Cash

* 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 4401 GREAT AMERICA PARKWAY Santa Clara CA 95054	Common	09/21/2026	661	132200.00
ADAM GELLER 4401 GREAT AMERICA PARKWAY Santa Clara CA 95054	Common	09/17/2026	4584	880173.84
ADAM GELLER 4401 GREAT AMERICA PARKWAY Santa Clara CA 95054	Common	09/16/2026	5578	1075230.90

144: Remarks and Signature

Remarks
Date of Notice	10/09/2026
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)