Company: GLASF
Filing Date: 2025-08-13
Form Type: 6-K
Source: 0001848731-25-000028
Chunk: 0

Company: Glass House Brands Inc.
Filing Date: 2025-08-13
Form: 6-K
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 6-K
<div align='center'>REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16</div>

#### UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of August, 2025.

Commission File Number 000-56261

#### Glass House Brands Inc.
<div align='center'>(Translation of registrant’s name into English)

3645 Long Beach Blvd.

Long Beach, California 90807

(Address of principal executive office)</div>

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ¨ Form 40-F x

### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Date: August 13, 2025 |     | Glass House Brands Inc.        
 /s/ Kyle Kazan                 |
|:----------------------|:----|:-------------------------------|
|                       |     | By: Kyle Kazan                 |
|                       |     | Title: Chief Executive Officer |

<div align='center'>2</div>

### EXHIBIT INDEX
| Exhibit Number 
 99.1           
 99.2           |     | Description                                                                                                                                                           
 Unaudited Condensed Interim Consolidated Financial Statements as of June 30, 2025 and December 31, 2024 and for the Three and Six Months Ended June 30, 2025 and 2024 
 Management’s Discussion and Analysis of Financial Condition and Unaudited Results of Operations for the Three and Six Months Ended June 30, 2025 and 2024             |
|:---------------|:----|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 99.3           |     | Form 52-109F2 Certification of Interim Filings – CFO                                                                                                                  |
| 99.4           |     | Form 52-109F2 Certification of Interim Filings – CEO                                                                                                                  |