# EDGAR Filing Document

**Accession Number:** 0001113423
**File Stem:** 0001493152-26-022001
**Filing Date:** 2026-5
**Character Count:** 4343
**Document Hash:** fdf2c7433a453602e8514fad79fdae8b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-26-022001.hdr.sgml**: 20260508

**ACCESSION NUMBER**: 0001493152-26-022001

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20260508

**FILED AS OF DATE**: 20260508

**DATE AS OF CHANGE**: 20260508

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COSCIENS Biopharma Inc.
- **CENTRAL INDEX KEY:** 0001113423
- **STANDARD INDUSTRIAL CLASSIFICATION:** PERFUMES, COSMETICS & OTHER TOILET PREPARATIONS [2844]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38064
- **FILM NUMBER:** 26959232

**BUSINESS ADDRESS:**
- **STREET 1:** C/O NORTON ROSE FULBRIGHT CANADA LLP
- **STREET 2:** 222 BAY STREET, SUITE 3000, PO BOX 53
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5K 1E7
- **BUSINESS PHONE:** 843-900-3201

**MAIL ADDRESS:**
- **STREET 1:** C/O NORTON ROSE FULBRIGHT CANADA LLP
- **STREET 2:** 222 BAY STREET, SUITE 3000, PO BOX 53
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5K 1E7

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Aeterna Zentaris Inc.
- **DATE OF NAME CHANGE:** 20040617

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AETERNA LABORATORIES INC
- **DATE OF NAME CHANGE:** 20000503

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 6-K**

**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16**

**UNDER THE SECURITIES EXCHANGE ACT OF 1934**

For the month of May, 2026

Commission File Number: **001-38064**

**COSCIENS Biopharma Inc.**

(Translation of registrant's name into English)

**c/o Borden Ladner Gervais, LLP**

**22 Adelaide St. West, Suite 3400**

**Bay Adelaide Centre, East Tower**

**Toronto ON M5H 4E3**

(Address of principal executive office)

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 ☐

On May 8, 2026, COSCIENS Biopharma Inc. (the "Company") issued a Notice of Annual General and Special Meeting of Shareholders (the "Notice of Meeting") in connection with the annual general and special meeting of shareholders of the Company (the "Meeting"). A copy of the Notice of Meeting is attached hereto as Exhibit 99.1, which is incorporated by reference herein.

**DOCUMENTS INDEX**

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| | |
|:---|:---|
| **Exhibit** | **Description** |
| 99.1 | [Notice of Annual General and Special Meeting of Shareholders](ex99-1.htm) |

---

**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.

---

| | | |
|:---|:---|:---|
|  | **COSCIENS Biopharma Inc.** | **COSCIENS Biopharma Inc.** |
| Date: May 8, 2026 | By: | */s/ Giuliano La Fratta* |
|  | Name: | Giuliano La Fratta |
|  | Title: | Chief Financial Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

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| | |
|:---|:---|
| May 8, 2026 | ![](ex99-1_001.jpg)<br> 650 De Maisonneuve Blvd., 7th Floor<br> Montreal QC, H3A 3T2<br> <u>www.computershare.com</u> |

---

To: All Canadian Securities Regulatory Authorities

**Subject: COSCIENS Biopharma Inc.**

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

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| | |
|:---|:---|
| Meeting Type : | Annual General and Special Meeting |
| Record Date for Notice of Meeting : | May 18, 2026 |
| Record Date for Voting (if applicable) : | May 18, 2026 |
| Beneficial Ownership Determination Date : | May 18, 2026 |
| Meeting Date : | **June 17, 2026** |
| Meeting Location (if available) : | **Virtual Meeting** |
| Issuer sending proxy related materials directly to NOBO: | No |
| Issuer paying for delivery to OBO: | Yes |

---

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| | |
|:---|:---|
| **Notice and Access (NAA) Requirements:** |  |
| NAA for Beneficial Holders | No |
| NAA for Registered Holders | No |

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<br>**Voting Security Details:**

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| | | |
|:---|:---|:---|
| **Description** | **CUSIP Number** | **ISIN** |
| COMMON SHARES | 22112H101 | CA22112H1010 |

---

Sincerely,

**Computershare**

Agent for COSCIENS Biopharma Inc.