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Solitario Resources Announces Preliminary Drill Results for Cat Creek Copper-Molybdenum Project

Solitario Resources announced preliminary visual results of its first two drill holes on its 100%-owned Cat Creek copper-molybdenum project in Colorado. Porphyry-style Cu-Mo mineralization was observed over significant core widths in both drill holes, although CC-002 was better mineralized than CC-001 in both molybdenum and copper. Based on preliminary core hole logging, CC-001 intersected visible molybdenite in two intervals. The first starting at 250.5 meters and continuing to 280.5 m, a core length of 30 m. Molybdenite occurred in trace amounts in this interval. The second interval, from 309.1 m to 372.0 m, had trace amounts of molybdenite in the upper half, but increased in abundance in the lower half where visible molybdenite was associated with increased quartz vein densities. Within this 58-meter core interval, four intervals ranging from 2-12 m in length, contained up to 10 quartz veinlets per meter with increased concentrations of visible molybdenite. The hole was terminated at 415.5 m in a post-mineral dike. Chalcopyrite was not identified visually, but pXRF analysis noted copper concentrations of up to 500 ppm in the lower 100 m of the hole. CC-002 was drilled 286.5 m vertically deeper than CC-001 and intersected stronger visible molybdenite and chalcopyrite than in hole CC-001. Molybdenite was noted over a core length of 382.9 m, starting at 258.1 m downhole and continuing to the end of the hole at 641 m. Molybdenite content was noted as trace through much of this interval. However, more abundant molybdenite mineralization was intersected from 371.8 to 584.5 m. Importantly, visible chalcopyrite is locally present over a 110.5 m core interval in the lowest part of CC-002 from 530.5 m to the end of the hole at 641.0 m. In the lower 37.2 m of the hole, abundant, well-developed, matrix-supported, chalcopyrite was intermittently observed in intrusive breccia.

Solitario Resources Sells 135,750 Shares for $116,745

Solitario Resources announced the purchase and sale of 135,750 shares of Company common stock, at a price of $0.86 per share for total gross proceeds of $116,745. The Sale was made under the terms of the Amended and Restated Investor Rights Agreement dated June 11, 2025 between Solitario and Newmont Overseas Exploration, a wholly-owned subsidiary of Newmont Corporation. Newmont chose to exercise a right to acquire the Shares as permitted by the IRA at the average price of shares sold through Solitario's at-the-market program sales from April 7 through July 29. Upon the issuance of the Shares, Newmont will hold 8,894,911 shares of Solitario common stock or approximately 9.4% of the outstanding shares maintaining Newmont's interest prior to the current period's at-the-money program.

Solitario Resources Announces Initial Drilling Results from Golden Crest Project

Solitario Resources announced assay results for its first three core holes in the Ponderosa area of its Golden Crest gold project in South Dakota have been received. Drilling began in mid-May at Golden Crest and was completed in late-July. Ten core holes totaling 2,949 meters were completed. Drilling focused in the Geyser area with six holes. Three core holes were completed to the east of Geyser on the Sleeping Beauty structural zone and one hole in the Holland target to the north. Assay results in the first three reported holes, PD-001, PD-002 and PD-007, intersected low level gold mineralization over multiple intervals in the Paleozoic limestones, but no high-grade feeder zones were cut. Hole PD-007, which was drilled out of the sequenced numbering system, intersected 1.3 meters grading 1.37 gpt gold in older Precambrian rocks. The remaining seven core holes are currently being assayed. Results of the next seven core holes are expected in late September or October. Drill hole locations for all ten holes are provided on the attached map.