# EDGAR Filing Document

**Accession Number:** 0001702123
**File Stem:** 0001062993-25-013016
**Filing Date:** 2025-7
**Character Count:** 12315
**Document Hash:** 25741fd4c85947438dbe47c76ca3caef
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001062993-25-013016.hdr.sgml**: 20250722

**ACCESSION NUMBER**: 0001062993-25-013016

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20250722

**FILED AS OF DATE**: 20250722

**DATE AS OF CHANGE**: 20250722

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Cardiol Therapeutics Inc.
- **CENTRAL INDEX KEY:** 0001702123
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40712
- **FILM NUMBER:** 251138689

**BUSINESS ADDRESS:**
- **STREET 1:** 602-2265 UPPER MIDDLE ROAD EAST
- **CITY:** OAKVILLE
- **STATE:** A6
- **ZIP:** L6H 0G5
- **BUSINESS PHONE:** 289-910-0850

**MAIL ADDRESS:**
- **STREET 1:** 602-2265 UPPER MIDDLE ROAD EAST
- **CITY:** OAKVILLE
- **STATE:** A6
- **ZIP:** L6H 0G5

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**UNITED STATES**<br>**SECURITIES AND EXCHANGE COMMISSION**<br>Washington, D.C. 20549

**FORM 6-K**

**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16** <br>**UNDER THE SECURITIES EXCHANGE ACT OF 1934**

For the month of **<u>July 2025</u>**

Commission File Number: **<u>001-40712</u>**

<u>**Cardiol Therapeutics Inc.**</u> <br>(Translation of registrant's name into English)

<u>**602-2265 Upper Middle Road East, Oakville, Ontario, Canada L6H 0G5**</u><br>(Address of principal executive offices)

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

[ ] Form 20-F&nbsp;&nbsp;&nbsp;&nbsp; [X] Form 40-F

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<u>**SUBMITTED HEREWITH**</u>

<u>Exhibits</u>

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| | |
|:---|:---|
| **Exhibit** | **Description** |
| [99.1](exhibit99-1.htm) | [News Release dated July 22, 2025 - Cardiol Therapeutics Announces Database Lock for Phase II ARCHER Trial of CardiolRx™ in Acute Myocarditis](exhibit99-1.htm) |

---

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<u>**SIGNATURES**</u>

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.

---

| | | |
|:---|:---|:---|
|  | **CARDIOL THERAPEUTICS INC.** | **CARDIOL THERAPEUTICS INC.** |
|  | (Registrant) | (Registrant) |
| Date: July 22, 2025 | By: | */s/ Chris Waddick* |
|  |  | Chris Waddick |
|  | Title: | Chief Financial Officer |

---

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## Exhibit 99.1

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**Cardiol Therapeutics Announces Database Lock for**

**Phase II ARCHER Trial of CardiolRx™ in Acute Myocarditis**

* *ARCHER is designed to assess the impact of CardiolRx™ on cardiac magnetic resonance imaging parameters that measure heart dysfunction and edema/fibrosis-key measurements used to predict prognosis in myocarditis patients.*

* *Acute myocarditis is a potentially life-threatening condition affecting the heart muscle (myocardium) and is characterized by chest pain, shortness of breath, fatigue, rapid or irregular heartbeat (arrhythmias), and light-headedness, and can lead to heart failure or sudden cardiac death.*

* *There are no FDA-approved drug therapies indicated for the treatment of acute myocarditis.*

* *Topline results are expected within the next two weeks.*

**Toronto, ON - July 22, 2025** - Cardiol Therapeutics Inc. (**NASDAQ: CRDL**) (**TSX: CRDL**) ("**Cardiol**" or the "**Company**"), a clinical-stage life sciences company focused on developing anti-inflammatory and anti-fibrotic therapies for the treatment of heart disease, today announced database lock for ARCHER, the Company's Phase II multi-national, randomized, double-blind, placebo-controlled trial investigating its lead asset, CardiolRx™, on myocardial recovery in patients with acute myocarditis.

"Database lock marks another important milestone in the ARCHER program, enabling statistical analysis, unblinding, and the reporting of topline results, which are now expected within the next two weeks," said David Elsley, President and Chief Executive Officer of Cardiol Therapeutics. "As we advance our lead program-the pivotal Phase III MAVERIC trial of CardiolRx™ in recurrent pericarditis-we believe results from ARCHER will further guide our broader development strategy in forms of heart disease where fibrosis plays a key role."

Dr. Andrew Hamer, Cardiol Therapeutics' Chief Medical Officer and Head of Research & Development, added, "Acute myocarditis remains a serious and underserved cardiovascular condition with no approved pharmacological therapy, underscoring the significance of ARCHER. On behalf of the ARCHER Steering Committee and Cardiol Therapeutics, I would like to thank our clinical investigators and the patients and their families for their essential contributions. We look forward to receiving the results of the statistical analysis, which we believe will provide important insights into the effects of CardiolRx™ on MRI-based measures of cardiac fibrosis and function in patients with myocarditis."

ARCHER is a Phase II multi-national, randomized, double-blind, placebo-controlled trial investigating the safety, tolerability, and impact of CardiolRx™ on myocardial recovery in patients presenting with acute myocarditis. The design and rationale for ARCHER were published on June 27, 2024, in the journal *ESC Heart Failure*. The study enrolled over 100 patients from leading cardiovascular research centers in the United States, France, Brazil, and Israel. The two primary outcome measures of the trial, which were evaluated following 12 weeks of double-blind therapy, consist of cardiac magnetic resonance imaging parameters: global longitudinal strain and extra-cellular volume, which assess myocardial function and tissue characteristics associated with fibrosis and inflammation. Both parameters are recognized prognostic markers in patients with acute myocarditis.

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**Acute Myocarditis**

Acute myocarditis is an inflammatory condition of the heart muscle (myocardium) characterized by chest pain, shortness of breath at rest or during activity, fatigue, rapid or irregular heartbeat (arrhythmias), and light-headedness or the feeling one might faint. The disease is an important cause of acute and fulminant heart failure and is a leading cause of sudden cardiac death in people under 35 years of age. Viral infection is the most common cause of myocarditis; however, it can also result from bacterial infection, commonly used drugs, and mRNA vaccines, as well as therapies used to treat several common cancers, including chemo-therapeutic agents and immune checkpoint inhibitors. There are no FDA-approved drug therapies for acute myocarditis. Patients hospitalized with the condition experience an average seven-day length of stay and a 4 - 6% risk of in-hospital mortality, with average hospital charge per stay estimated at $110,000 in the United States.

**About Cardiol Therapeutics**

Cardiol Therapeutics Inc. (**NASDAQ: CRDL**) (**TSX: CRDL**) is a clinical-stage life sciences company focused on developing anti-inflammatory and anti-fibrotic therapies for the treatment of heart disease. The Company's lead small molecule drug candidate, CardiolRx™ (cannabidiol) oral solution, is pharmaceutically manufactured and in clinical development for use in the treatment of heart disease. It is recognized that cannabidiol inhibits activation of the inflammasome pathway, an intracellular process known to play an important role in the development and progression of inflammation and fibrosis associated with myocarditis, pericarditis, and heart failure.

Cardiol has received Investigational New Drug Application authorization from the United States Food and Drug Administration ("US FDA") to conduct clinical studies to evaluate the efficacy and safety of CardiolRx™ in two diseases affecting the heart: recurrent pericarditis and acute myocarditis. The MAVERIC Program in recurrent pericarditis, an inflammatory disease of the pericardium which is associated with symptoms including debilitating chest pain, shortness of breath, and fatigue, and results in physical limitations, reduced quality of life, emergency department visits, and hospitalizations, comprises the completed Phase II MAvERIC-Pilot study (NCT05494788) and the ongoing Phase III MAVERIC trial (NCT06708299). The ongoing ARCHER trial (NCT05180240) is a Phase II study in acute myocarditis, an important cause of acute and fulminant heart failure in young adults and a leading cause of sudden cardiac death in people less than 35 years of age. The US FDA has granted Orphan Drug Designation to CardiolRx™ for the treatment of pericarditis, which includes recurrent pericarditis.

Cardiol is also developing CRD-38, a novel subcutaneously administered drug formulation intended for use in heart failure-a leading cause of death and hospitalization in the developed world, with associated healthcare costs in the United States exceeding $30 billion annually.

For more information about Cardiol Therapeutics, please visit <u>cardiolrx.com</u>.

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**Cautionary statement regarding forward-looking information:**

*This news release contains "forward-looking information" within the meaning of applicable securities laws. All statements, other than statements of historical fact, that address activities, events, or developments that Cardiol believes, expects, or anticipates will, may, could, or might occur in the future are "forward-looking information". Forward looking information contained herein may include, but is not limited to statements regarding the Company's focus on developing anti-inflammatory and anti-fibrotic therapies for the treatment of heart disease, the Company's intended clinical studies and trial activities and timelines associated with such activities, including the Company's plan to complete the Phase III study in recurrent pericarditis with CardiolRx*™*, the Company's plan to advance the development of CRD-38, a novel subcutaneous formulation of cannabidiol intended for use in heart failure, the Company's preparation for statistical analysis, unblinding, and reporting of top-line results from its Phase II ARCHER trial of CardiolRx™ in acute myocarditis, and the Company's belief that results from the ARCHER trial will provide insights to help guide its broader development strategy in forms of heart disease where fibrosis plays a key role, and into the effects of CardiolRx*™ *on MRI-based measures of cardiac fibrosis and function in patients with myocarditis. Forward-looking information contained herein reflects the current expectations or beliefs of Cardiol based on information currently available to it and is based on certain assumptions and is also subject to a variety of known and unknown risks and uncertainties and other factors that could cause the actual events or results to differ materially from any future results, performance or achievements expressed or implied by the forward looking information, and are not (and should not be considered to be) guarantees of future performance. These risks and uncertainties and other factors include the risks and uncertainties referred to in the Company's Annual Information Form filed with the Canadian securities administrators and U.S. Securities and Exchange Commission on March 31, 2025, available on SEDAR+ at sedarplus.ca and EDGAR at sec.gov, as well as the risks and uncertainties associated with product commercialization and clinical studies. These assumptions, risks, uncertainties, and other factors should be considered carefully, and investors should not place undue reliance on the forward-looking information, and such information may not be appropriate for other purposes. Any forward-looking information speaks only as of the date of this press release and, except as may be required by applicable securities laws, Cardiol disclaims any intent or obligation to update or revise such forward-looking information, whether as a result of new information, future events, or results, or otherwise. Investors are cautioned not to rely on these forward-looking statements.*

**For further information, please contact:**

Trevor Burns, Investor Relations +1-289-910-0855

<u>trevor.burns@cardiolrx.com</u>

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