Radisson Continues to Expand Scope of High-Grade Gold Mineralization Beneath the Former O'Brien Gold Mine with New Drill Results Including 68.24 g/t Gold over 6.2 Metres

Radisson Mining Resources Inc. (RDS) has reported significant gold intercepts from eight new holes drilled as part of its ongoing 140,000 m step-out program at the 100%-owned O'Brien Gold Project in Abitibi, Québec. The results come from two clusters of pilot-hole wedges, with mineralization identified beneath the former mine over a now 1,000-metre vertical interval that extends downward to as much as 2 km.

Key intercepts from the latest drilling include:

• OB-26-385W5: 68.24 g/t Au over 6.20 m (core length), including 384.01 g/t over 1.0 m and including 28.68 g/t over 1.0 m; the release explicitly states a residual (halo) grade of 2.48 g/t Au. Vein sampled between 1,514.2 m and 1,515.2 m downhole.
• OB-26-385W8: 27.27 g/t over 3.3 m (incl. 72.40 g/t over 1.2 m; residual 1.49 g/t); 3.90 g/t over 9.3 m (incl. 6.10 g/t over 2.0 m and 5.78 g/t over 1.2 m; residual 2.81 g/t); 8.35 g/t over 4.0 m (incl. 16.10 g/t over 1.5 m; residual 3.7 g/t).
• OB-25-378W4: 8.14 g/t over 5.50 m (incl. 11.52 g/t over 3.70 m; residual 1.19 g/t).
• OB-26-385W7: 18.13 g/t over 2.0 m (incl. 34.91 g/t over 1.0 m; residual 1.35 g/t).
• OB-25-378W5: 3.90 g/t over 9.3 m (incl. 16.84 g/t over 1.4 m; residual 1.60 g/t) and 4.00 g/t over 4.60 m.

Technical parameters for the reported intercepts vary by table, with Table 1 intercepts at a 3.00 g/t Au bottom cut-off and Table 3 at 1.00 g/t Au over a minimum 1.0 m. Sample grades are uncapped, and true widths are estimated at 30-80% of core length. These figures contrast with the January 31, 2026 MRE, which used a 2.20 g/t cut-off, US$2,500/oz gold, 1.2 m minimum mining width and a 60 g/t Au cap on individual assays.

Since late 2024, 128 holes have been completed, yielding 106 hits for an 83% success rate. Eight rigs are currently active, and the company notes that mineralization remains open in every direction.

Radisson Mining Resources Inc. (RDS) has transitioned from a pre-resource micro-cap to an advanced explorer, supported by a 2.32 moz Mineral Resource Estimate (MRE) that is approximately 73% Inferred. The company holds a July 2025 Preliminary Economic Assessment (PEA), an IAMGOLD toll-milling memorandum of understanding, and a C$57.15 million strategic investment from Agnico Eagle. This investment represents a 10.45% non-diluted and 14.90% partially diluted stake, struck at C$1.07 with a C$1.39 warrant. The company is currently executing an eight-rig, 140,000-meter drilling program.

The best previously reported intercept on the O'Brien system was hole OB-26-385W4, released on July 7, 2026, which returned 316.31 g/t over 5.1 meters (~1,613 g.m uncut, ~69 g.m capped). On an uncut basis, the best hole from today’s release at 423 g.m represents approximately 26% of that previous record. However, on the company’s capped basis, today’s intercept of ~16 g/t over 6.2 meters is superior to the previous best of ~13.6 g/t over 5.1 meters. The last routine release on September 2, 2026, featured a best hole of 52.34 g/t over 3.0 meters (~157 g.m, ~21 g/t over 3.0 meters capped); today’s results are superior in both grade and width.

Radisson’s stock has roughly doubled over the twelve months covered by the price data, rising from C$0.53 on October 14, 2025, to C$1.18 currently, and sits approximately 9% below its 52-week high of C$1.30. The primary driver of the current price level is the August 24, 2026, Agnico Eagle strategic investment, which gapped the stock from C$1.01 to C$1.27, a 26% increase in a single day. This occurred at a C$1.07 subscription price, representing a 6% premium to the market and 19% to the 20-day volume-weighted average price (VWAP). The July record hole itself moved the stock only from approximately C$0.80 to C$0.89 before it round-tripped. Consequently, the factor embedded in the price is the validated large-system and strategic-partner thesis rather than any single intercept.

Today’s holes confirm the system thesis at grades at or above resource grade, over good core widths, with an above-average disclosure standard and the best capped-grade intercept in the routine news flow. These results do not extend the system into a new zone, add a new dimension of scale—previously achieved between October 2025 and February 2026—or alter the resource, PEA, or development timeline. Against the embedded thesis, the results serve as confirmation rather than differentiation; against the last routine release, they are positively differentiated.

At a market capitalization of approximately C$595 million and an enterprise value of ~C$500 million against 2.32 moz, the equity is capitalized at a level normally reserved for a project moving toward feasibility. Incremental step-out ounces are worth single-digit percentages of enterprise value per release.

Radisson Mining Resources Inc. (TSXV: RDS; OTCQX: RMRDF) is a gold exploration and development company whose only material asset is the 100%-owned O'Brien Gold Project in the Bousquet-Cadillac mining camp, Abitibi, Québec, on the Larder Lake-Cadillac Break.

The company’s Mineral Resource Estimate effective January 31, 2026, includes 0.63 moz Indicated (3.49 Mt at 5.59 g/t Au) and 1.69 moz Inferred (10.37 Mt at 5.08 g/t Au), for ~2.32 moz total, at a 2.20 g/t cut-off, US$2,500/oz gold, 1.2 m minimum mining width and a 60 g/t assay cap. The March 2, 2026 update grew Inferred resources by 82% (tonnes +55%, grade +17%) while Indicated grade fell 32% on a 58% tonnage increase.

A July 2025 Preliminary Economic Assessment (PEA) outlined an 11-year mine life with low capital intensity via off-site processing and tailings management. The assessment indicated 86-96% metallurgical recoveries based on flow-sheet work at IAMGOLD's Doyon mill under a memorandum of understanding.

Exploration efforts include a 140,000 m step-out program with up to eight rigs. Since late 2024, 128 holes have been completed at an 83% hit rate, and the exploration floor is being extended to 2.5 km using pilot holes and directional wedges. Interim Mineral Resource Estimates are planned as drilling progresses. A conceptual exploration target of 5-10 Mt at 4.0-6.0 g/t (0.6-2.0 moz) to 2 km depth was previously disclosed and is not a resource.

In the first quarter of 2026, the company reported a net loss of C$212,142 on exploration and evaluation spend of C$4.84M. Liquidity stood at approximately C$28M at March 31, 2026, comprising C$15.97M in cash plus C$12M in GICs, with no debt. Subsequent to the quarter, the company closed a C$25M flow-through placement at C$1.38 on May 28, 2026, and a C$57.15M Agnico Eagle placement at C$1.07 closed on September 1-2, 2026, giving an estimated treasury in the C$95-110M range before Q2/Q3 spend.

Agnico Eagle holds approximately 10.45% non-diluted and ~14.90% partially diluted shares, with board nomination rights, top-up rights and restrictions on dispositions, royalties, streams, offtake and secured financing of Radisson's mineral properties through December 31, 2028. The proceeds fund an advanced underground exploration program including an access ramp and mine infrastructure.