• Osisko Development published its MD&A report, outlining progress on the Cariboo Gold Project and ongoing care and maintenance at the Tintic Project.
• At Cariboo, underground development reached about 2.1 km into the Lowhee Zone, with development rates affected by ground conditions around the Lowhee fault.
• An underground infill drilling program totaling 13,000 meters had 11,025 meters reported, with the company targeting completion in Q2 2026.
• A fully funded 70,000-meter exploration drilling campaign at Cariboo began in November 2025, with about 6,000 meters completed to date.
• For Cariboo’s 2025 feasibility study base case, initial capital costs were CAD 881.0 million and life-of-mine all-in sustaining costs were USD 1,157/oz.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Osisko Development Corp. published the original content used to generate this news brief on March 28, 2026, and is solely responsible for the information contained therein.