# EDGAR Filing Document

**Accession Number:** 0001374339
**File Stem:** 0001104659-26-041485
**Filing Date:** 2026-4
**Character Count:** 5111
**Document Hash:** fc07409f829db2149dea9d3cbddc3f39
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-041485.hdr.sgml**: 20260409

**ACCESSION NUMBER**: 0001104659-26-041485

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260409

**DATE AS OF CHANGE**: 20260409

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ProMIS Neurosciences Inc.
- **CENTRAL INDEX KEY:** 0001374339
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** Z4
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41429
- **FILM NUMBER:** 26851534

**BUSINESS ADDRESS:**
- **STREET 1:** SUITE 200, 1920 YONGE STREET
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M4S 3E2
- **BUSINESS PHONE:** 416-847-6898

**MAIL ADDRESS:**
- **STREET 1:** SUITE 200, 1920 YONGE STREET
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M4S 3E2

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMORFIX LIFE SCIENCES LTD
- **DATE OF NAME CHANGE:** 20060831

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**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

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**SCHEDULE 14A**

**Proxy Statement Pursuant to Section 14 (a) of the**

**Securities Exchange Act of 1934 (Amendment No.)**

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Filed by the Registrant ☒

Filed by a party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6 (e) (2))**

☐ Definitive Proxy Statement

&nbsp;&nbsp;&nbsp;&nbsp;☒ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

**PROMIS NEUROSCIENCES INC.**

**(Name of Registrant as Specified in its Charter)**

**Not applicable.**

**(Name of Person (s) Filing Proxy Statement, if other than the Registrant)**

Payment of Filing Fee (Check all boxes that apply):

&nbsp;&nbsp;&nbsp;&nbsp;☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25 (b) per Exchange Act Rules 14a-6 (i) (1) and 0-11.

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| &nbsp;&nbsp;![GRAPHIC](pmn-20260409xdefa14a_bg001.jpg) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\*Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.com Control # V92333-P49784 PROMIS NEUROSCIENCES INC. ONE BROADWAY, SUITE 1400 CAMBRIDGE, MA 02142 USA Your Vote Counts! PROMIS NEUROSCIENCES INC. 2026 Annual Meeting Vote by May 19, 2026 11:59 PM ET Vote Virtually at the Meeting\* May 20, 2026 10:30 am, Eastern Time Virtually at: www.virtualshareholdermeeting.com/PMN2026 You invested in PROMIS NEUROSCIENCES INC. and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the shareholder meeting to be held on May 20, 2026. Get informed before you vote View the Notice and Proxy Statement and Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 6, 2026. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. |

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| &nbsp;&nbsp;![GRAPHIC](pmn-20260409xdefa14a_bg002.jpg) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". Voting Items Board Recommends V92334-P49784 THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. 1. Election of Directors To elect seven directors, each to serve until the next annual meeting of shareholders and until his or her respective successors is duly elected and qualified, or such director's earlier death, resignation, or removal. 1a. Eugene Williams For 1b. Neil Cashman, M.D. For 1c. Joshua Mandel-Brehm For 1d. Maggie Shafmaster, Ph.D., J.D. For 1e. Neil K. Warma For 1f. William Wyman For 1g. Slanix Alex, Pharm.D For 2. Appointment of Auditors To ratify the appointment of Baker Tilly US, LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2026. For 3. To approve an amendment to the ProMIS Neurosciences Inc. 2025 Stock Option and Incentive Plan. For NOTE: Such other business as may properly come before the meeting or any adjournment thereof. |

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