ZeroStack (ZSTK) president sells final 1,000 shares, now holds none

Rhea-AI Filing Summary

ZeroStack Corp. (ZSTK) reported that its President, Rong Rudy, sold 1,000 Common Shares on 2026-08-19 in an open market or private transaction at $7.57 per share. Following this sale, Rudy’s directly held position in ZeroStack common stock reported in this filing is 0 shares. The transaction was not reported as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Seller: 1,000 shares

Net Sell 1 txn

Insider Rong Rudy

Role President

Sold 1,000 shs ($8K)

Type	Security	Shares	Price	Value
Sale	Common Shares	1,000	$7.57	$8K

Holdings After Transaction: Common Shares — 0 shares (Direct)

Key Figures

Shares sold: 1,000 Common Shares Sale price per share: $7.57 per share Shares held after transaction: 0 shares +1 more

4 metrics

Shares sold 1,000 Common Shares Non-derivative sale on 2026-08-19

Sale price per share $7.57 per share Common Shares transaction on 2026-08-19

Shares held after transaction 0 shares Direct ownership following reported sale

Net buy/sell shares -1,000 shares Net of all reported transactions in this Form 4

Key Terms

Form 4, non-derivative, transaction code

3 terms

Form 4 regulatory

"INSIDER FILING DATA (Form 4): {"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

""transaction_type": "non-derivative""

transaction code regulatory

""transaction_code": "S""

FAQ

What insider transaction did ZeroStack Corp. (ZSTK) report for Rong Rudy?

ZeroStack reported that its President, Rong Rudy, sold 1,000 Common Shares on 2026-08-19 in a transaction coded as a sale in the open market or a private transaction at $7.57 per share.

How many ZeroStack Corp. (ZSTK) shares did Rong Rudy hold after the reported sale?

After the reported transaction, Rong Rudy’s directly held position in ZeroStack common stock shown in this filing is 0 shares.

At what price did Rong Rudy sell ZeroStack Corp. (ZSTK) shares?

Rong Rudy sold 1,000 Common Shares of ZeroStack Corp. at a price of $7.57 per share on 2026-08-19.

Was Rong Rudy’s ZeroStack (ZSTK) share sale under a Rule 10b5-1 trading plan?

The filing indicates the Rule 10b5-1 checkbox is not selected, so the reported sale of 1,000 Common Shares at $7.57 per share was not affirmed as being made under a Rule 10b5-1 trading plan.

What role does Rong Rudy hold at ZeroStack Corp. (ZSTK)?

Rong Rudy is reported as an officer of ZeroStack Corp., serving in the role of President at the time of the disclosed sale of 1,000 Common Shares.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/21/2026 - 07:52 PM Accepted by SEC EDGAR 08/21/2026 - 07:51 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rong Rudy

(Last) (First) (Middle)

C/O ZEROSTCK CORP.

2626 COLE AVENUE, SUITE 300

(Street)

DALLAS TEXAS 75204

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ZeroStack Corp. [ ZSTK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	08/19/2026		S		1,000	D	$7.57	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Rudy Rong	08/21/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)