Company: CRLBF
Filing Date: 2025-06-13
Form Type: 6-K
Source: 0001832928-25-000013
Chunk: 0

Company: Cresco Labs Inc.
Filing Date: 2025-06-13
Form: 6-K
Chunk 0
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### 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 June, 2025

#### 000-56241
<div align='center'>(Commission File Number)</div>

#### Cresco Labs Inc.
<div align='center'>(Exact name of Registrant as specified in its charter)</div>

#### 600 W. Fulton Street, Suite 800
Chicago, IL 60661

<div align='center'>(Address of principal executive offices)</div>

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

<div align='center'>Form 20-F ☐ Form 40-F ☒</div>

#### INFORMATION CONTAINED IN THIS FORM 6-K REPORT
On June 12, 2025, Cresco Labs Inc. (the “

#### Company
”) filed a notice of change of auditor and related documents with Canadian securities regulatory authorities and issued a news release regarding the auditor change. Copies of these documents are furnished as Exhibits to this Report on Form 6-K.

This Report on Form 6-K and the exhibits attached hereto are hereby incorporated by reference into the Company’s effective registration statements (including any prospectuses forming a part of such registration statements) on file with the U.S. Securities and Exchange Commission (the “

#### SEC
”) and are to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.

| EXHIBIT INDEX |     |                                  |
| Exhibit No.   |     | Description                      |
| 99.1          |     | Notice of Change of Auditor      |
| 99.2          |     | Letter from Former Auditor       |
| 99.3          |     | Letter from Successor Auditor    |
| 99.4          |     | News Release dated June 12, 2025 |

| SIGNATURES                                                                                                                                                                                |     |                  |     |                         |
| 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, there