Director at ZeroStack Corp. (ZSTK) receives 35,000 stock options grant

Rhea-AI Filing Summary

ZeroStack Corp. director Manfred Leventhal received a grant of 35,000 stock options. These Director Stock Options give him the right to buy 35,000 common shares at an exercise price of $5.10 per share and expire on May 4, 2036.

The options vest in three equal installments: one-third on May 5, 2026, one-third on August 30, 2026, and one-third on December 31, 2026. After this grant, he holds 35,000 options directly, reflecting a compensation award rather than an open-market trade.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider LEVENTHAL MANFRED

Role null

Type	Security	Shares	Price	Value
Grant/Award	Director Stock Option ("Right to Buy")	35,000	$0.00	--

Holdings After Transaction: Director Stock Option ("Right to Buy") — 35,000 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Options granted: 35,000 options Exercise price: $5.10 per share Expiration date: May 4, 2036 +2 more

5 metrics

Options granted 35,000 options Director stock option grant on May 5, 2026

Exercise price $5.10 per share Director stock option strike price

Expiration date May 4, 2036 Option term end for director grant

Underlying shares 35,000 common shares Shares covered by director options

Post-grant options held 35,000 options Total derivative holdings after transaction

Key Terms

Director Stock Option, exercise price, expiration date, vesting

4 terms

Director Stock Option financial

"security_title: "Director Stock Option ("Right to Buy")""

exercise price financial

"conversion_or_exercise_price: "5.1000""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

expiration date financial

"expiration_date: "2036-05-04T00:00:00.000Z""

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

vesting financial

"The options vest as follows: 1/3 on May 5, 2026; 1/3 on August 30, 2026; and 1/3 on December 31, 2026."

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Form 4 Insider Transactions: What Each Field Means →

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^*

LEVENTHAL MANFRED

(Last) (First) (Middle)

C/O ZERSTACK CORP.

40 KING STREET WEST, SUITE 2400

(Street)

TORONTO M5H 3Y2

(City) (State) (Zip)

ONTARIO, CANADA

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/05/2026

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

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
Director Stock Option ("Right to Buy")	$5.1	05/05/2026		A		35,000		(1)	05/04/2036	Common Shares	35,000	$0	35,000	D

Explanation of Responses:

1. The options vest as follows: 1/3 on May 5, 2026; 1/3 on August 30, 2026; and 1/3 on December 31, 2026.

	/s/ Dany Vaiman as attorney-in-fact for Manfred Leventhal	05/06/2026
	** 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)

FAQ

What insider transaction did ZeroStack Corp. (ZSTK) report for Manfred Leventhal?

ZeroStack Corp. reported that director Manfred Leventhal received a grant of 35,000 stock options. These options are a compensation award, not an open-market purchase, and give him the right to buy common shares at a fixed exercise price of $5.10.

What are the key terms of the 35,000 stock options granted at ZeroStack (ZSTK)?

The director stock options cover 35,000 common shares at an exercise price of $5.10 per share, expiring on May 4, 2036. They are held directly by the director and represent a right to buy shares in the future.

How do the ZeroStack (ZSTK) director stock options vest for Manfred Leventhal?

The 35,000 options vest in three equal tranches: one-third on May 5, 2026, one-third on August 30, 2026, and one-third on December 31, 2026. Vesting means the director gradually earns the right to exercise them.

Is the ZeroStack (ZSTK) Form 4 transaction a stock purchase or a grant?

The Form 4 shows a grant/award acquisition, not an open-market stock purchase. Code “A” indicates a compensation-related award of options, giving the director future purchase rights rather than reflecting an immediate buy or sell in the market.

How many ZeroStack (ZSTK) options does the director hold after this grant?

Following the transaction, the director holds 35,000 stock options directly. This total matches the newly granted award, and no additional derivative positions are listed, so the filing highlights this single compensation grant as his current option holding.