Announcement • Jun 20

STLLR Gold Inc. Reports Additional Assay Results From 2026 Drilling Program At Jonpol Deposit Of Tower Gold Project

STLLR Gold Inc. reported additional assay results from its 2026 drilling program at the Jonpol Deposit at the Garrison Property of the Tower Gold Project in the Timmins Mining Camp in Ontario, Canada. STLLR has completed 8,536 m of drilling at Jonpol for its first-half 2026 drill program, with assay results pending for the remaining holes. Table 1: 2026 Jonpol Deposit Drilling Highlights: Jonpol MGA26-268 13.00 g/t Au (uncut)/7.37 g/t Au (cut) over 22.75 m (16.66 m TT) (including 29.09 g/t Au (uncut)/16.16 g/t Au (cut) over 9.91 m (7.28 m TT); Jonpol MGA26-266 3.01 g/t Au (uncut)/2.51 g/t Au (cut) over 22.93 m (17.16 m TT) (including 11.95 g/t Au (uncut)/9.54 g/t Au (cut) over 4.80 m (3.59 m TT). The Jonpol Deposit is situated in the Garrison Property at the eastern end of Tower along the Munro Fault, a splay from the regional Destor-Porcupine Fault Zone. Mineralization is hosted in structurally controlled alteration zones within mafic to ultramafic rocks and gold mineralization is closely associated with felsic intrusive rocks. The drill program is designed to deliver on two primary objectives: Strike Extension: majority of the 2026 meterage targets the western extension of Jonpol’s open-pit mineralization. Successful results here could expand the strike from 400 m as currently defined in the Tower Preliminary Economic Assessment to approximately 1,200 m. Jonpol remains open along strike and at depth. Infill and De-risking: the drill program is also designed to confirm the block model and support the potential expansion of higher-grade mineralization to incorporate into the Tower Mineral Resource Estimate. These additional assays continued to intersect near-surface, high-grade mineralization in targeted areas along the western strike extension. Most of the intersected grades exceed the current average open-pit grades at Jonpol in the Tower Mineral Resource Estimate, suggesting the potential to expand the mineral resources. These results continue to confirm the current geological model, supporting the potential expansion of higher-grade mineralization. Quality Control Procedures: NQ drill core is oriented and cut with half sent to ALS Laboratories Inc. for drying and crushing to -2 mm, with a 1.00 kg split pulverized to -75 µm (200#). ALS is an ISO 17025 accredited laboratory. A 50 g charge is Fire Assayed and analyzed using an AAS finish for Gold. Samples above 10.00 g/t Au are analyzed by Fire Assay with a gravimetric finish and selected samples with visible gold or high-grade mineralization are assayed by Metallic Screen Fire Assay on a 1.00 kg sample. STLLR inserts independent certified reference material and blanks with the samples and assays routine pulp repeats, as well as completing routine third-party check assays. True thickness was calculated in Leapfrog Geo, perpendicular to the interpreted plane of mineralization using the dip and dip azimuth of the mineralized zones. All intercepts are calculated using a 0.30 g/t Au cut-off, a maximum of 5 m internal dilution and 25 g/t Au cap applied.

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STLLR Gold Inc. Reports Additional Assay Results From 2026 Drilling Program At Jonpol Deposit Of Tower Gold Project

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