Osisko Development Corp. — AGM Information 2023

May 10, 2023

POWERTAP HYDROGEN CAPITAL CORP.

Suite 810, 789 West Pender Street

Vancouver, British Columbia V6C 1H2

NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS

NOTICE IS GIVEN THAT an annual general meeting (the “ Meeting ”) of the holders of common shares (the “ Shareholders ”) of Powertap Hydrogen Capital Corp. (“ Powertap ” or the “ Company ”) will be held at Suite 810, 789 West Pender Street, Vancouver, British Columbia V6C 1H2, on Thursday, June 8, 2023 at 11:00 a.m. (Vancouver time), for the following purposes:

1. to receive the audited financial statements of the Company for the fiscal year ended June 30, 2021 and June 30, 2022;

2. to set the number of directors at four (4);

3. to elect the directors of the Company to hold office until the next annual meeting of Shareholders;

4. to appoint Smythe Ratcliff LLP, as the Company’s auditors for the ensuing year and to authorize the Board of Directors to fix the remuneration to be paid to the auditor; and

5. to transact such other business as may be properly brought before the Meeting or any adjournment thereof.

The accompanying Information Circular provides additional information relating to the matters to be dealt with at the Meeting and is supplemental to, and expressly made a part of, this Notice of Meeting.

The Company’s Board of Directors has fixed April 18, 2023 as the record date for the determination of Shareholders entitled to receive notice of and to vote at the Meeting and at any adjournment or postponement thereof. Each registered Shareholder at the close of business on that date is entitled to receive such notice and to vote at the Meeting in the circumstances set out in the accompanying Information Circular.

The Company has elected to use the notice-and-access provisions under National Instrument 54-101 and National Instrument 51-102 (the “Notice-and-Access Provisions”) for the Meeting. The Notice-and- Access Provisions are a set of rules developed by the Canadian Securities Administrators that reduce the volume of materials that must be physically mailed to Shareholders by allowing the Company to post the Information Circular, the Company’s 2022 audited financial statements and the related management’s discussion and analysis, and any additional materials (collectively, the “Meeting Materials”) online. Shareholders will still receive this Notice of Meeting, a form of proxy and request for financial information form and may choose to receive a paper copy of the Meeting Materials.

The Company will not use the procedure known as ‘stratification’ in relation to the use of Notice-and- Access Provisions. Stratification occurs when a reporting issuer using the Notice-and-Access Provisions provides a paper copy of the Information Circular to some shareholders with this notice package. In relation to the Meeting, all Shareholders will receive the required documentation under the Notice-and- Access Provisions, which will not include a paper copy of the Meeting Materials.

PLEASE REVIEW THE INFORMATION CIRCULAR CAREFULLY IN FULL PRIOR TO VOTING IN RELATION TO THE RESOLUTIONS BEING PRESENTED, AS THE INFORMATION CIRCULAR HAS BEEN PREPARED TO HELP YOU MAKE AN INFORMED DECISION ON THE MATTERS. THE INFORMATION CIRCULAR IS AVAILABLE AT http://www.Eproxy.ca/PowertapHydrogen/2023AGM/ AND UNDER THE COMPANY’S PROFILE ON SEDAR AT WWW.SEDAR.COM ANY SHAREHOLDER WHO WISHES TO RECEIVE A PAPER COPY ON THE MEETING MATERIALS (INCLUDING THE INFORMATION CIRCULAR) SHOULD CONTACT THE COMPANY AT 789 WEST PENDER STREET, SUITE 810, VANCOUVER, BRITISH COLUMBIA, V6C 1H2, BY FAX 604-687-3141, BY TELEPHONE TOLL FREE AT 1-888-787-0888 OR BY EMAIL AT ASMITH1661@GMAIL.COM SHAREHOLDERS MAY

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ALSO USE THE TOLL FREE NUMBER NOTED ABOVE TO OBTAIN ADDITIONAL INFORMATION ABOUT THE NOTICE-AND-ACCESS PROVISIONS.

If you are a registered Shareholder of the Company and unable to attend the Meeting in person, please complete, date and sign the accompanying form of proxy and deposit it with the Company’s transfer agent, Endeavor Trust Corporation (the “ Transfer Agent ”) at their offices located at 702 – 777 Hornby Street, Vancouver, British Columbia, V6Z 1S4, by mail, or by fax at 604-559-8908, or by email at proxy@endeavortrust.com, no later than 11:00a.m. on June 6, 2023 or at least 48 hours (excluding Saturdays, Sundays and holidays recognized in the Province of British Columbia) before the time and date of any adjournment or postponement of the Meeting.

If you are a non-registered Shareholder and received this Notice of Meeting and accompanying materials through a broker, a financial institution, a participant, a trustee or administrator of a self-administered retirement savings plan, retirement income fund, education savings plan or other similar self-administered savings or investment plan registered under the Income Tax Act (Canada), or a nominee of any of the foregoing that holds your securities on your behalf (the “ Intermediary ”), please complete and return the materials in accordance with the instructions provided to you by your Intermediary.

In view of the current and rapidly evolving COVID-19 outbreak, the Company asks that, in considering whether to attend the Meeting in person, shareholders follow the instructions of the Public Health Agency of Canada (https://www.canada.ca/en/public-health/services/diseases/2019-novel-coronavirusinfection.html). The Company encourages Shareholders not to attend the Meeting in person if experiencing any of the described COVID-19 symptoms of fever, cough or difficulty breathing. The Company may take additional precautionary measures in relation to the Meeting in response to further developments in the COVID-19 outbreak. As always, the Company encourages shareholders to vote prior to the Meeting. Shareholders are encouraged to vote on the matters before the Meeting by proxy and to join the Meeting by teleconference. To access the Meeting by teleconference, dial toll free at 1-800-319-7310 , Participation Code: 18707 , followed by the # sign.

Dated at Vancouver, British Columbia, this 25[th] day of April, 2023.

BY ORDER OF THE BOARD OF DIRECTORS

“Raghu Kilambi” Raghu Kilambi, Chief Executive Officer