Radisson Step-Out Drilling at O'Brien Gold Project Intersects High-Grade Mineralization in Multiple Locations

Radisson Mining Resources announced high-grade gold intercepts from fifteen new drill holes at its O'Brien Gold Project in Quebec. The results are part of the recently expanded 140,000-metre step-out drill program.

Key intercepts include: - Hole OB-25-371W5: 10.5 g/t Au over 6.5 metres on Trend #2. - Hole OB-25-371W4: 11.25 g/t Au over 2.5 metres on Trend #2. - Hole OB-25-376W1: 9.16 g/t Au over 2.5 metres in the O'Brien Mine West area.

According to CEO Matt Manson, these results successfully extend high-grade mineralization, including 160 metres below the former mine workings in the western portion. Critically, drilling on the western edge of Trend #2 suggests the apparent gap between Trend #1 and Trend #2 is a function of sparse drill coverage rather than geology, which is a key priority to follow up on.

The news is Material - Positive. This is the first batch of results released since the company closed a major C$25 million financing and massively expanded its drill program to 140,000 metres. The results serve as an immediate and successful proof-of-concept for this aggressive, fully-funded exploration strategy.

• Execution Confirmation: The results demonstrate management is effectively deploying the newly raised capital and hitting high-grade mineralization where expected. This builds confidence in their ability to execute the large-scale program.
• De-risking the Exploration Target: The intercepts extend known high-grade zones and, importantly, suggest that previously modeled gaps between mineralized trends may be filled in with further drilling. This supports the company's thesis that O'Brien is a much larger, continuous system at depth and increases the probability of achieving their 3-4 million ounce exploration target.
• Market Reaction: While not a "bonanza grade" discovery hole that would cause a major spike, this news provides solid, consistent results that underpin the investment thesis. It should provide strong support for the stock price, particularly after the recent C$0.60 financing, by showing that the money is being put to work effectively.

The results are in line with, and confirm, high expectations. They reinforce the geological model and validate the significant step-up in exploration spending.

Radisson Mining Resources is a Canadian gold exploration company focused on its 100%-owned O'Brien Gold Project, located in the prolific Bousquet-Cadillac mining camp in Abitibi, Québec. The project hosts the former O'Brien Mine, which was one of Québec's highest-grade gold producers.

The company's strategy shifted in late 2024 to aggressively test the thesis that the high-grade O'Brien mineralization extends to significant depths, well below the historic mine workings and the existing resource. This has been consistently proven correct with multiple high-grade intercepts at depth.

In July 2025, Radisson published a positive Preliminary Economic Assessment (PEA) outlining a low-capital, high-return underground mining operation based on a conceptual toll milling agreement with IAMGOLD. The PEA showed an after-tax NPV5% of $532 million and a 48% IRR at a $2,550/oz gold price.