TDG Announces Positive Results from Ongoing Metallurgical Test Work - Conventional Processing Achieves >90% Gold and Silver Recoveries At Shasta, Toodoggone District

• TDG Gold Corp. released positive metallurgical test results for its Shasta Gold-Silver Project, METS prospect, and Baker tailings, conducted by Ausenco Engineering Canada ULC.
• Testing demonstrates high gold and silver recoveries (92.4% Au, 90.3% Ag) using a simple, conventional gravity and open-circuit flotation process.
• Locked-cycle testing confirms >91% recovery of both metals.
• The preferred flowsheet utilizes a coarse grind size (80% passing 150 µm P80), which supports potential lower operating costs and favorable tailings dewatering.
• Silver contributes approximately 35-40% of the recovered metal value in tested Shasta composites.
• Concentrate quality is strong, with low impurity levels (Cu <100 ppm, As <12 ppm) and high sulphur recovery (~91%).
• Baker TSF and METS prospect preliminary tests show lower but promising recoveries (68% Au/61% Ag for Baker; 83.8% Au/71.8% Ag for METS), with additional optimization testing planned.
• Results directly support the ongoing Preliminary Economic Assessment (PEA), which was initiated on June 1, 2026, and targets completion in Q3 2026.

Historical News Progression & Projection Materialization: - June 2025: Company executed a C$28.76M bought-deal financing and acquired Anyox Copper Ltd., establishing a strong treasury and expanding its land package. - Aug-Dec 2025: Rapid exploration execution at Aurora West, intersecting >600m of continuous high-grade Au-Ag-Cu mineralization and identifying new porphyry targets. - Feb-Apr 2026: Discovery and expansion of the 4300 Zone VMS lens at Anyox, demonstrating district-scale exploration success. - June 1, 2026: Initiation of the Shasta PEA, setting the stage for economic benchmarking. - June 17, 2026: Metallurgical results confirm the technical feasibility of the Shasta resource, validating management's earlier projections regarding processing simplicity and cost efficiency. The company is executing its 2026 strategy on schedule.

• The news is positive but routine. Metallurgical testing is a standard, expected milestone in advancing a project toward a PEA.
• The results materially reduce technical risk by confirming favorable processing characteristics, low impurities, and a cost-effective flowsheet. This supports the upcoming PEA's economic modeling.
• However, the announcement does not provide new economic metrics, resource updates, or financing. The market was already aware of the PEA timeline from the June 1 release.
• Impact on stock: Likely neutral to slightly positive in the short term. The stock has been in a sustained downtrend since peaking at $1.76 in September 2025. Without a major economic catalyst or exploration breakthrough, incremental technical validation is insufficient to reverse the current price action.

• TDG Gold Corp. is a Canadian exploration and development company focused on the Toodoggone District in British Columbia.
• Flagship Project: Shasta Gold-Silver Project (100% owned). Pit-constrained mineral resource estimates indicate 515.8 koz AuEq (Indicated) at 1.35 g/t and 505.5 koz AuEq (Inferred) at 1.04 g/t.
• Portfolio: Includes the Aurora West Cu-Au-Ag porphyry system, the newly discovered 4300 Zone VMS copper lens at Anyox, and historical Baker tailings.
• Strategy: Management focuses on demonstrating asset value through technical studies, advancing permitting milestones, and delivering exploration outperformance across a ~60,000-hectare land package.