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Voting Instruction Form (“VIF”) – Annual General Meeting of Shareholders of Alithya Group inc. (the “Company”) to be held at 10:00 a.m. (Eastern Daylight Time) on September 13, 2023 (the “Meeting”) This VIF is solicited by and on behalf of management. Notes 1. The enclosed proxy-related materials are being sent to you in connection with the Meeting of the Company, of which you hold shares through the intermediary identified above, and which will be held in a virtual-only format via live webcast online athttps://web.lumiagm.com/458064416. As you are a non-registered shareholder, unless you appoint the persons named by management on this VIF as your proxyholder to represent you at the Meeting and vote on your behalf as per your voting instructions, you must appoint yourself or someone else as your proxyholder and attend or have such other person attend the Meeting using a proxyholder control number for your vote to be counted. 2. Your intermediary is prohibited from voting your shares on any of the matters to be acted upon at the Meeting. In order for your shares to be voted at the Meeting, it is necessary for you to appoint a proxyholder and submit your voting instructions. Please promptly complete and return the information requested in this VIF to provide your voting instructions or vote using the Internet or by telephone as indicated below. 3. If you want to attend the Meeting and vote in person, please write your name in the space provided for that purpose on this VIF. You can also write the name of someone else whom you wish to attend the Meeting and vote on your behalf. Unless prohibited by law, the person whose name is written in the space provided will have full authority to vote on all matters that are presented at the Meeting, even if those matters are not set out in this VIF or in the management information circular. Consult a legal advisor if you wish to modify the authority of that person in any way. 4. If the shares are registered in the name of more than one shareholder, at least one of the shareholders must sign this VIF. If the shares are registered in the name of a corporation or other legal entity, an authorized officer or attorney must sign this VIF and indicate his or her signing capacity. This person may be requested to provide proof that he or she is authorized to sign. 5. The shares’ voting rights represented by this VIF will be voted as instructed by you on the reverse. If, however, instructions are not made in respect of any matter, the shares’ voting rights represented by this VIF will be voted as recommended by management, if the persons named by management are appointed as your proxyholder, or, if they are not, as such other proxyholder sees fit. 6. This VIF confers discretionary authority to the proxyholder to vote as the proxyholder sees fit in respect of amendments or variations to matters identified in the Notice of Meeting or other matters as may properly come before the meeting or any adjournment thereof. 7. Your voting instructions will be recorded on receipt. 8. By providing voting instructions, you are acknowledging that you are the beneficial owner of, and are entitled to direct the voting of, the shares represented by this VIF. 9. If you have any questions regarding the enclosed documents or require assistance, please contact the registered representative at your intermediary who services your account or TSX Trust at 1-800-387-0825 or by email at shareholderinquiries@tmx.com. 10. This VIF should be read in conjunction with the management information circular and other Meeting materials. All voting instructions must be received by 10:00 a.m. (Eastern Daylight Time) on September 11, 2023. How to Vote VOTE USING THE INTERNET OR BY TELEPHONE 24 HOURS A DAY, 7 DAYS A WEEK! INTERNET TELEPHONE Go to www.tsxtrust.com/vote-proxy Using a touch-tone phone, call 1-888-489-7352 (toll free in Canada and the United States) Cast your vote online and follow the voice instructions. View Meeting documents To vote using your smartphone, please scan this QR Code: To vote by internet or telephone you will need your control number. If you vote by internet or telephone, DO NOT return this VIF. MAIL, FAX OR EMAIL Complete and return your signed proxy in the envelope provided or send to: TSX Trust Company P.O. Box 721 Agincourt, ON M1S 0A1 You may alternatively fax your VIF to 1-416-595-9593 or scan and email it to proxyvote@tmx.com. Voting by internet, mail, fax or email are the only methods by which a holder may appoint a person as proxyholder other than the proxyholders named on the reverse of this VIF.