STLLR Gold Intersects 10.10 g/t Au over 5.57 m, 2.55 g/t Au over 19.70 m and 3.37 g/t Au over 14.53 m at Tower Gold Project's Jonpol Deposit

Toronto, Ontario--(Newsfile Corp. - May 21, 2026) - STLLR Gold Inc. (TSX: STLR) (OTCQX: STLRF) (FSE: O9D) ("STLLR" or the "Company") reports additional assay results from its 2026 drilling program at the Jonpol Deposit (" Jonpol ") at the Garrison Property of the Tower Gold Project (" Tower " or the " Project ") in the Timmins Mining Camp in Ontario, Canada. Table 1: 2026 Jonpol Deposit Drilling Highlights:   "We continue to deliver high-grade, near-surface results at Jonpol, demonstrating its upside potential as a significant value-driver for the Tower Gold Project ," said Keyvan Salehi, P.Eng., MBA, President, CEO, and Director of STLLR. "The drill data we have gathered this year suggests Jonpol's open-pit strike extension towards 1,200 meters at potentially above-average grades.

More importantly, higher open-pit grades at Jonpol have the ability to enhance Tower's production profile and overall economics." Jonpol Deposit Drilling (See Figures 1-5 for Diagrams; See Tables 1-3 for Assays and Drill Details) The Jonpol Deposit is situated in the Garrison Property at the eastern end of Tower (see Figure 1) 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. The 2026 drill program, with an estimated 8,000 m of planned drilling in the first half of the year (STLLR is currently finalizing plans for the second half of the year), 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 (" Tower PEA ") [1] to approximately 1,200 m. Jonpol remains open along strike and at depth. Infill and De-risking: the drill program is a