Osisko Development Corp. — Capital/Financing Update 2022

Feb 28, 2022

Notice Declaring Intention to be Qualified under National Instrument 44-101 – Short Form Prospectus Distributions ("NI 44-101")

TO: British Columbia Securities Commission (as principal regulator)

AND TO: Alberta Securities Commission Autorité des marchés financiers

Osisko Development Corp. (the " Issuer ") intends to be qualified to file a short form prospectus under NI 44-101. The Issuer acknowledges that it must satisfy all applicable qualification criteria prior to filing a preliminary short form prospectus. This notice does not evidence the Issuer's intent to file a short form prospectus, to enter into any particular financing or transaction or to become a reporting issuer in any jurisdiction. This notice will remain in effect until withdrawn by the Issuer.

DATED this 28[th] day of February, 2022.

OSISKO DEVELOPMENT CORP.

Per: (signed) "Alexander Dann" Name: Alexander Dann Title: Chief Financial Officer & Vice President Finance, Osisko Development Corp.