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Osisko Development Announces the Vote Results from Its Annual and Special Meeting of Shareholders

Shareholder Meetings

OSISKO DEVELOPMENT ANNOUNCES THE VOTE RESULTS FROM

ITS ANNUAL AND SPECIAL MEETING OF SHAREHOLDERS

(Montréal, April 27, 2022) – Osisko Development Corp. (“Osisko Development” or the “ Corporation”) (TSX.V-ODV)

announces that, at the annual and special meeting of shareholders held on April 26, 2022, each of the 6 nominees

listed in the management information circular filed on April 4, 2022 with the regulatory authorities were elected as

directors of the Corporation.

Election of Directors

Based on the proxies received, the following individuals were elected as directors of the Corporation until the next

annual shareholders’ meeting, with the following results:

RESOLUTION No1

Name of Nominee

Votes cast

FOR

Percentage (%)

of votes cast

FOR

Votes

WITHHELD

Percentage (%)

WITHHELD

Marina Katusa 116,471,844 99.997 3,984 0.003

Michèle McCarthy 116,446,149 99.975 29,679 0.025

Duncan Middlemiss 116,445,349 99.974 30,479 0.026

Charles E. Page 116,444,649 99.973 31,179 0.027

Sean Roosen 116,444,800 99.973 31,028 0.027

Éric Tremblay 116,440,821 99.970 35,007 0.030

Appointment and Remuneration of Auditor

Based on the proxies received, PricewaterhouseCoopers, LLP, Chartered Professional Accountants, was appointed

as independent auditor of the Corporation for the ensuing year and the directors are authorized to fix its remuneration,

with the following results:

RESOLUTION No2 Votes cast

FOR

Percentage (%)

of votes cast

FOR

Votes

WITHHELD

Percentage (%)

WITHHELD

Appointment and Remuneration of

Auditor 116,755,518 99.960 46,827 0.040

Approval of the existing Stock Option Plan

Based on the proxies received with respect to the adoption of an ordinary resolution to approve the Corporation’s

existing Stock Option Plan, the results are as follows:

RESOLUTION No3 Votes cast

FOR

Percentage (%)

of votes cast

FOR

Votes cast

AGAINST

Percentage (%)

AGAINST

Ordinary Resolution to approve the

existing Stock Option Plan 115,709,094 99.342 766,734 0.658

- 2 -

Approval of the Share Consolidation

Based on the proxies received with respect to the adoption of a special resolution authorizing an amendment to the

articles of the Corporation to effect a consolidation of the issued and outstanding common shares of the Corporation

for a number to be determined within a range of two (2) and three (3) pre-consolidation common shares and authorizing

the directors of the Corporation to determine the final consolidation ratio within such range, the results are as follows:

RESOLUTION No4 Votes cast

FOR

Percentage (%)

of votes cast

FOR

Votes cast

AGAINST

Percentage (%)

AGAINST

Special resolution to approve the Share

Consolidation 116,414,128 99.947 61,700 0.053

Following the annual and special meeting of shareholders of the Corporation, the Board of Directors determined to

consolidate its common shares on a 3 for one basis, subject to the receipt of all necessary approvals.

About Osisko Development Corp.

Osisko Development Corp. is uniquely positioned as a premier gold development company in North America to

advance the Cariboo Gold Project and other Canadian and Mexican properties, with the objective of becoming the next

mid-tier gold producer. The Cariboo Gold Project, located in central British Columbia, Canada, is Osisko Development's

flagship asset with measured and indicated resource of 21.44 million tonnes at 4.6 g/t Au for a total of 3.2 million

ounces of gold and inferred resource of 21.69 million tonnes at 3.9 g/t Au for a total of 2.7 million ounces of gold. The

considerable exploration potential at depth and along strike distinguishes the Cariboo Gold Project relative to other

development assets as does the historically low, all-in discovery costs of US$19 per ounce. The Cariboo Gold Project

is advancing through permitting as a 4,750 tonnes per day underground operation with a feasibility study on track for

completion in the first half of 2022. Osisko Development's project pipeline is complemented by potential near -term

production targeted from the San Antonio Gold Project, located in Sonora, Mexico.

For further information about Osisko Development Corp., please contact:

Jean Francois Lemonde, VP Investor Relations

Telephone: (514) 299-4926

Email: [email protected]

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies

of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. No

stock exchange, securities commission or other regulatory authority has approved or disapproved the

information contained herein.

- 3 -

Cautionary Note Regarding Forward-Looking Statements

This news release may contain forward- looking statements and forward- looking information within the meaning of applicable

Canadian securities legislation (collectively, "forward- looking information"), including, but not limited to, obtaining the necessary

approvals to complete the share consolidation, statements relating to the future financial or operating performance of the

Corporation, the Corporation’s mineral projects, the future price of metals, the estimation of mineral resources, the realization of

mineral resource estimates, the timing and amount of estimated future production (if any), capital, operating and exploration

expenditures, costs and timing of the development of new deposits, costs and timing of future exploration, use of proceeds fr om

financings, requirements for additional capital, government regulation of mining operations and mineral exploration activities,

environmental risks, reclamation expenses, title disputes or claims, limitations of insurance coverage, development of the projects,

timing (if at all) to complete a prefeasibility study on the projects. Often, but not always, forward-looking information can be identified

by the use of words and phrases such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts",

"intends", "anticipates", or "believes" or variations (including negative variations) of such words and phrases, or state that cert ain

actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved.

Although the Corporation believes that the assumptions underlying the forward-looking information contained in this news release

are reasonable, this list is not exhaustive of the factors that may affect any forward-looking information. The key assumptions that

have been made in connection with forward- looking information include the following: the significance of drill results and ongoing

exploration activities; timing to obtain assay results from labs; ability of exploration activities (including drill results) to accurately

predict mineralization; the predictability of geological modelling; the accuracy of the Corporation’s records of its property interests;

the global economic climate; metal prices; environmental risks; community and non- governmental actions; that permits required

for the Corporation’s operations will be obtained on a timely basis in order to permit the Corporation to proceed on schedule with

its planned drilling programs; that skilled personnel and contractors will be available as the Corporation operations continue to

grow; that the price of gold will exceed levels that will render the project of the Co rporation economical; the relevance of the

assumptions and that the Corporation will be able to continue raising the necessary capital to finance its operations.

Forward-looking information involves known and unknown risks, future events, conditions, unc ertainties and other factors which

may cause the actual results, performance or achievements to be materially different from any future results, performance or

achievements expressed or implied by forward- looking information. Such factors include, among ot hers, general business,

economic, competitive, political and social uncertainties; the actual results of current exploration activities; errors in geological

modelling; conclusions of economic evaluations; changes in project parameters as plans continue to be refined; future prices of

metals; possible variations of grade or recovery rates; failure of plant and equipment or processes to operate as anticipated;

accidents, labour disputes and other risks of the mining industry; political instability; and delays in obtaining governmental approvals

or financing or in the completion of development or construction activities.

Although the Corporation has attempted to identify important factors that could cause actual actions, events or results to differ

materially from those described in forward-looking information, there may be other factors that cause actions, events or results to

differ from those anticipated, estimated or intended, including the risk factors stated in its most recent Annual Information Form

filed on SEDAR (www.sedar.com). Forward-looking information contained herein is given as of the date of this news release and

the Corporation disclaims any obligation to update any forward-looking information, whether as a result of new information, future

events or results, except as may be required by applicable securities laws. There can be no assurance that forward- looking

information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such

statements. Accordingly, readers should not place undue reliance on forward- looking information.