# EDGAR Filing Document

**Accession Number:** 0001790169
**File Stem:** 0000912282-26-000557
**Filing Date:** 2026-4
**Character Count:** 7054
**Document Hash:** 6cd1c390e8975f65ec4ab9d34116f895
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912282-26-000557.hdr.sgml**: 20260402

**ACCESSION NUMBER**: 0000912282-26-000557

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260402

**DATE AS OF CHANGE**: 20260402

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Heinrich Michael
- **CENTRAL INDEX KEY:** 0002093136

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40397
- **FILM NUMBER:** 26836416

**MAIL ADDRESS:**
- **STREET 1:** C/O FLORA GROWTH CORP.
- **STREET 2:** 3230 W. COMMERCIAL BLVD., SUITE 180
- **CITY:** FORT LAUDERDALE
- **STATE:** FL
- **ZIP:** 33309
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ZeroStack Corp.
- **CENTRAL INDEX KEY:** 0001790169
- **STANDARD INDUSTRIAL CLASSIFICATION:** WHOLESALE-DRUGS PROPRIETARIES & DRUGGISTS' SUNDRIES [5122]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 40 KING STREET WEST
- **STREET 2:** SUITE 2400
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5H 3Y2
- **BUSINESS PHONE:** 416-861-2267

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 40 KING STREET WEST
- **STREET 2:** SUITE 2400
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5H 3Y2

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Flora Growth Corp.
- **DATE OF NAME CHANGE:** 20191003

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

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Heinrich Michael<br><sub>(Last) (First) (Middle)</sub><br>C/O ZEROSTACK CORP.<br>40 KING STREET W., SUITE 2400<br><sub>(Street)</sub><br>TORONTO, ONTARIO, CANADA M5H 3Y2<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-31 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Executive Chairman_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>ZeroStack Corp. [ ZSTK ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Convertible Promissory Note | $33.34 | 2026-03-31 |  | J<sup>(1)</sup> |  |  | 4902220 | 2025-10-23 | 2035-09-22 | Common Shares | 4902220 | <sup>(2)</sup> | 0 | I | Held by Zero Gravity Labs Inc., a corporation owned and controlled by the Reporting Person |

---

### Footnotes:

(1) On March 31, 2026, the Issuer entered into a note settlement agreement (the "Note Settlement Agreement") with Zero Gravity Labs Inc., a Delaware corporation ("0G") pursuant to which the convertible promissory note (the "Note") issued to 0G pursuant to the securities purchase agreement dated September 22, 2025, as amended on October 9, 2025, by and between the Issuer and 0G was settled.  The Note Settlement Agreement provides that upon payment by the Issuer to 0G on or before March 31, 2026, of 50,000,000 Tokens (as defined in the Note), the Issuer shall be deemed to have paid the entire Principal (as defined in the Note) and Interest (as defined in the  Note) of the Note in full and the Issuer shall have no further obligations under the Note and the Note shall be deemed to be satisfied.

(2) Represents issuance of convertible promissory note to Zero Gravity Labs Inc., a Delaware corporation owned and controlled by the Reporting Person, in the principal amount of 50,000,000 0G bitcoin tokens.

**Signature:** /s/ Dany Vaiman as attorney-in-fact for Michael Heinrich  
**Date:** 2026-04-02

### Remarks:

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.**