Osisko Gold TAO Drilling Expands Cariboo Footprint With High-Grade Proserpine Discovery

• Osisko Gold Group completed initial diamond drilling at the Proserpine target, defining a mineralized footprint of one kilometer by half a kilometer near its permitted Cariboo project.
• The program uncovered high-grade gold structures and broader lower-grade zones that suggest potential for future open-pit mining operations.
• Analysts emphasize the significant scale of the discovery, noting that drilling has only tested a small portion of a much larger, open-ended target.
• Despite positive geological data, investor sentiment remains neutral due to persistent cash burn and ongoing technical downtrends in the stock.

Osisko Gold Group Inc. reported initial diamond drilling results from the Proserpine regional greenfield target, located approximately seven kilometers southeast of the Cariboo Gold deposit in central British Columbia. The exploration program, which completed 6,463 meters in fourteen holes between February and May 2026, confirmed high-grade gold structures alongside broader lower-grade zones. These findings have expanded the known mineralized footprint at Proserpine to roughly one kilometer along strike by half a kilometer in width.

Gold mineralization was encountered from near surface to depths beyond 400 meters, remaining open in all directions. Because all holes that reached their intended target depth intersected mineralization, Osisko has resumed drilling with three rigs. The company plans a further 26,500 meters to increase drill density at Proserpine Southeast and begin first-pass drilling at Proserpine Northwest.

What Does Proserpine Drilling Reveal About Open-Pit Potential?

Early drilling at the Proserpine target has outlined a new mineralized system that could support future open-pit mining operations to complement the company's planned underground development at Cariboo. The announcement triggered a 12.2% stock surge to $3.83, valuing the company at roughly $1.2 billion.

Key drilling results include hole PSP-26-004, which intersected 4.6 meters grading 95.93 grams per tonne gold, including a high-grade 50-centimeter interval of 873 grams gold. Another hole, PSP-26-001, returned 8.6 meters grading 5.46 grams gold. National Bank Financial analyst Don DeMarco noted that while the grades are noteworthy, the critical takeaway is the scale of the mineralized system.

The drilling has only tested a small portion of a much larger target, suggesting significant upside potential for the asset. Osisko Gold is a Canadian gold mining and exploration company listed on the NYSE and TSXV, focusing on advancing its 100%-owned, permitted Cariboo Gold Project. The activity underscores the prospect of a sizeable new gold system close to its permitted Cariboo project.

How Does High-Grade Mineralization Impact Cariboo Development?

The Cariboo project is Osisko’s main development asset, representing a permitted underground mine in the historic Wells-Barkerville camp. A 2025 feasibility study projects a 10-year life producing 1.89 million ounces of gold, with an after-tax net present value of $943 million and a 22.1% internal rate of return at a US$2,400 per ounce gold price. The project holds 1.61 million ounces in measured and indicated resources.

Recent deep drilling at Cariboo has extended gold mineralization below 700 meters vertical depth, reinforcing the project’s long-term growth potential. Construction work has been advancing while underground drilling continues to refine the mine plan and test extensions to mineralization beyond the current reserve base.

The Proserpine discovery supports the prospect of identifying additional deposits to extend mine life through regional greenfield targets. However, analyst sentiment reflects caution due to persistent losses and heavy cash burn, which imply ongoing funding needs. TipRanks’ AI Analyst, Spark, rates ODV as Neutral, with technicals adding further pressure through a clear downtrend and weak momentum.

Valuation offers limited support because negative earnings make the price-to-earnings ratio difficult to interpret and no dividend yield is available. Osisko Gold Group reported final results from its Lowhee Zone Infill Program at the Cariboo Gold Project, supporting the continued use of existing geological and mine-planning assumptions.

The completion of the infill drill program validates parameters subject to ongoing work, while new surface exploration drilling tested near-mine potential at depth. Intercepts included 13.19 grams gold over 3.60 meters and 28.90 grams gold over 0.50 meters, extending gold mineralization at Cariboo beyond 700 meters vertical depth in previously untested areas. This comprehensive exploration campaign aims to identify additional deposits and expand the resource base at the Cariboo project.