Mr. Keyvan Salehi reports

STLLR GOLD INTERSECTS 13.00 G/T AU OVER 22.75 M AND 3.01 G/T AU OVER 22.93 M AT THE JONPOL DEPOSIT OF THE TOWER GOLD PROJECT

STLLR Gold Inc. has released 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.

"Hole MGA-268 delivered the best intersected metal factor at Jonpol so far in our 2026 program, demonstrating the high-grade, near-surface nature of the deposit and its potential to drive value for the Tower gold project," said Keyvan Salehi, PEng, MBA, president, chief executive officer and director of STLLR. "We are more confident in Jonpol's open-pit strike extension toward 1,200 meters at potentially above-average grades, which could enhance Tower's production profile and overall economics."

Jonpol deposit drilling (see tables 1 and 2 for assays)

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 (DPFZ). Mineralization is hosted in structurally controlled alteration zones within mafic to ultramafic rocks and gold mineralization is closely associated with felsic intrusive rocks.

STLLR has completed 8,536 metres of drilling at Jonpol for its drill program for the first half of 2026, with assay results pending for the remaining holes. STLLR is currently finalizing drilling plans for the remainder of 2026. This year's programs are designed to deliver on two primary objectives:

• Strike extension: Majority of the 2026 metreage targets the western extension of Jonpol's open-pit mineralization. Successful results here could expand the strike from 400 metres (as currently defined in the Tower preliminary economic assessment) to approximately 1,200 metres. Jonpol remains open along strike and at depth.
• Infill and derisking: 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 (see Table 1) 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 MRE, 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 minus-two millimetres, with a 1.00-kilogram split pulverized to minus-75 micrometres (200 mesh). ALS is an ISO 17025-accredited laboratory. A 50-gram charge is fire assayed and analyzed using an AAS finish for gold. Samples above 10.00 grams per tonne gold 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-kilogram 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-gram-per-tonne-gold cut-off, a maximum of five-metre internal dilution and 25-gram-per-tonne-gold cap applied.

Qualified person

John McBride, MSc, PGeo, vice-president of exploration for STLLR, who is the qualified person as defined by National Instrument 43-101 for this project, has reviewed and approved of the technical disclosure contained in this news release.

About STLLR Gold Inc.

STLLR Gold is a Canadian gold development company actively advancing high-potential gold projects in Canada: The Tower gold project and the Hollinger tailings project in the Timmins mining camp in Ontario and the Colomac gold project, located north of Yellowknife, NWT. Tower and Colomac have the potential to become large-scale, long-life operations and are surrounded by exploration land with favourable upside potential. Hollinger has the potential for near-term value creation. STLLR's experienced management team, with a record of successfully advancing projects and operating mines, is working toward rapidly advancing these projects.

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