# EDGAR Filing Document

**Accession Number:** 0002120766
**File Stem:** 0001104659-26-070652
**Filing Date:** 2026-6
**Character Count:** 6816
**Document Hash:** 342debeabaf5642da7a946bc5b5c1d03
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-070652.hdr.sgml**: 20260604

**ACCESSION NUMBER**: 0001104659-26-070652

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260601

**FILED AS OF DATE**: 20260604

**DATE AS OF CHANGE**: 20260604

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Tu William
- **CENTRAL INDEX KEY:** 0002120766

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-56261
- **FILM NUMBER:** 261066698

**MAIL ADDRESS:**
- **STREET 1:** 3645 LONG BEACH BLVD
- **CITY:** LONG BEACH
- **STATE:** CA
- **ZIP:** 90807
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Glass House Brands Inc.
- **CENTRAL INDEX KEY:** 0001848731
- **STANDARD INDUSTRIAL CLASSIFICATION:** MEDICINAL CHEMICALS & BOTANICAL PRODUCTS [2833]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3645 LONG BEACH BLVD
- **CITY:** LONG BEACH
- **STATE:** CA
- **ZIP:** 90807
- **BUSINESS PHONE:** 562-264-5078

**MAIL ADDRESS:**
- **STREET 1:** 3645 LONG BEACH BLVD
- **CITY:** LONG BEACH
- **STATE:** CA
- **ZIP:** 90807

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Mercer Park Brand Acquisition Corp.
- **DATE OF NAME CHANGE:** 20210302

### 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>Tu William<br><sub>(Last) (First) (Middle)</sub><br>3645 LONG BEACH BLVD<br><sub>(Street)</sub><br>LONG BEACH, CA 90807<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-01 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_SVP, Corporate Controller_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Glass House Brands Inc. [ GLASF ] | **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 |
| Equity Shares<sup>(1)</sup> | 2026-06-01 |  | M |  | 5800 | A | <sup>(3)</sup> | 5800 | D |  |
| Equity Shares<sup>(1)</sup> | 2026-06-03 |  | F |  | 1982 | D | 11.37<sup>(4)</sup> | 3818 | D |  |

---

## 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 |
| Restricted Stock Unit<sup>(3)</sup> | 0<sup>(3)</sup> | 2026-06-01 |  | M |  |  | 5800 | <sup>(2)</sup> | <sup>(2)</sup> | Equity Shares<sup>(1)</sup> | 5800 | $0 | 145071 | D |  |

---

### Footnotes:

(1) The Subordinate Voting Shares, Restricted Voting Shares, and/or Limited Voting Shares of Glass House Brands Inc. ("GHBI") (collectively, the "Equity Shares").

(2) The Reporting Person was granted RSU awards covering 34,800 RSUs on September 1, 2024 (the "September RSUs"). 5,800 of the September RSUs vested on June 1, 2026.

(3) Each RSU represents the right to receive, at settlement, one share of GHBI's Equity Shares.

(4) The Equity Shares were sold to satisfy the Reporting Person's tax withholding obligations. Represents the Equity Shares sold at a weighted average sale price of $11.37 per share. The Equity Shares were sold in multiple transactions at prices ranging from $11.35 to $11.39. The Reporting Person will provide, upon request by the staff of the Securities and Exchange Commission, Issuer, or a security holder of Issuer, full information regarding the number of Equity Shares sold at each separate price.

**Signature:** /s/ Benjamin Vega, Attorney-in-Fact for William Tu  
**Date:** 2026-06-04

### 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.**