Osisko Gold Reports High-Grade Proserpine Drilling Results Near Cariboo

• Osisko Gold Group confirmed high-grade gold structures and broader lower-grade zones at the Proserpine target during initial drilling results.
• The findings validate a new mineralized system that could support open-pit mining methods near the permitted Cariboo project.
• Analysts emphasize that the scale of the discovery is critical, as mineralization remains open in all directions beyond the tested area.
• Osisko is simultaneously transitioning to a pure-play royalty company to resolve management conflicts and stabilize cash flows.
• The stock rose 12.2% following the announcement, reflecting investor interest in the project's potential for resource growth.

Osisko Gold Group Inc. announced initial diamond drilling results from its Proserpine regional greenfield target, located approximately seven kilometres southeast of the Cariboo Gold deposit in central British Columbia. The exploration program completed 6,463 metres across 14 holes between February and May 2026. These results confirmed high-grade gold structures alongside broader lower-grade zones, indicating significant potential for open-pit mining methods.

Drilling expanded the known mineralized footprint at Proserpine to roughly one kilometre along strike by half a kilometre in width. Gold was encountered from near surface to depths beyond 400 metres, with mineralization remaining open in all directions. President Chris Lodder noted that while high-grade intercepts are encouraging, the scale of the mineralization is the critical driver for future resource growth.

Highlight intercepts included 95.93 g/t Au over 4.60 m at 71 m vertical depth and 5.46 g/t Au over 8.60 m at 77 m vertical depth. These findings validate the exploration thesis that Proserpine could become a significant contributor to future resource growth at the Cariboo project.

What Drilling Results Reveal About Proserpine's Scale?

The Proserpine target is part of a larger 6.0 km by 1.0 km gold-in-soil and rock anomaly. The tested area of 1.0 km by 0.5 km represents only a small portion of this broader geological system. This parallels the 4.0 km strike extent of the existing Cariboo deposit, underscoring substantial exploration upside.

National Bank Financial analyst Don DeMarco emphasized that while grades are exceptional, the scale is more important for valuation. Drilling has defined mineralization over only a small portion of a larger target that remains open in all directions. This suggests potential for additional resource growth as drilling continues to test extensions beyond the current reserve base.

Osisko has resumed drilling with three rigs and plans a further 26,500 metres to increase drill density at Proserpine Southeast. The company will also begin first-pass drilling at Proserpine Northwest to expand the known footprint further. This activity underscores the prospect of a sizeable new gold system close to its permitted Cariboo project.

How Does Osisko's Strategic Pivot Affect Investors?

Osisko Gold Royalties Ltd. is undergoing a significant strategic transition to become a pure-play royalty and streaming company. The company historically operated with a dual mandate of holding royalties and owning stakes in junior mining companies, which created management conflicts. The new CEO has initiated a cleanup of these issues, including cutting ties with Osisko Mining through a secondary offering.

From an investment perspective, the company is viewed as undervalued, trading just over its net asset value (NAV). Unlike producers, royalty companies like Osisko do not face the same operational cost inflation, providing more stable cash flows as gold prices rise. The company boasts a strong balance sheet and a robust development pipeline.

Analysts project organic asset growth of 10-12% per annum over the next few years. While the dividend yield is modest, the primary investment thesis relies on capital appreciation driven by gold's upward trajectory and the successful execution of the pure-play transition. The stock trades near net asset value, making it cheaper than peers like Agnico Eagle Mines (AEM).

The Cariboo project itself includes a permitted underground mine with a 2025 feasibility study projecting 1.89 million ounces of gold over 10 years. This project hosts 17.4 million measured and indicated tonnes grading 2.88 grams gold. The after-tax net present value is estimated at $943 million, supporting the valuation of the Proserpine discovery.

Construction at Cariboo is advancing while deep drilling continues to test extensions beyond the current reserve base. The Proserpine discovery supports the potential for future open-pit mining operations to complement the planned underground mine. This dual approach could enhance the overall economics of the Cariboo project.

Osisko Gold Group's recent name change from Osisko Development reflects its pure-play royalty and streaming focus. The company retains 100% ownership of the Cariboo project assets, ensuring direct exposure to future production. This structural change is intended to reduce management conflicts and stabilize cash flows for investors.

The stock responded positively to the Proserpine announcement, jumping 12.2% to $3.83. This valuation of approximately $1.2 billion reflects investor interest in the project's potential for resource growth. The combination of high-grade drilling results and strategic corporate restructuring positions Osisko for potential long-term value creation.

Sources remain consistent regarding the scale of the Proserpine discovery and the strategic transition of Osisko Gold Royalties. The company's focus on organic growth and operational cleanup aligns with market preferences for stable, operator-free royalty assets.