Onyx Gold extends Argus North to 700+ m depth: 3.5 g/t Au over 28.1 m

Argus Main Returns 1.0 g/t Gold over 93.0 Meters; New Drilling 250 Meters Northeast Intersects 2.6 g/t Gold over 7.3 Meters Vancouver, British Columbia--(Newsfile Corp. - July 16, 2026) - Onyx Gold Corp.  (TSXV: ONYX) (OTCQX: ONXGF)  (" Onyx " or the " Company ") is pleased to report results from 17 drill holes at its 100%-owned Munro-Croesus Project (" Munro-Croesus " or the " Project "), located 75 km east of Timmins, Ontario. The results extend gold mineralization at both Argus North and Argus Main and identify a new area of mineralization 250 m northeast of Argus Main along the projected Argus Fault corridor. The most significant result is from Argus North, where hole MC26-274A returned 3.5 g/t gold (" Au ") over 28.1 meters (" m "), including 5.3 g/t Au over 17.8 m .

Drilling has now intersected Argus North from near surface to more than 700 m vertical depth, and the zone remains open at depth and along strike. At Argus Main, three (3) deeper holes continued to intersect broad gold mineralization, including 1.0 g/t Au over 93.0 m in hole MC26-324. Approximately 250 m to the northeast, first-pass drilling intersected 2.6 g/t Au over 7.3 m in a previously undrilled area, providing a new target for follow-up.

Highlights from Argus North Argus North continues at depth: the zone has now been intersected to more than 700 m vertically and remains open. MC26-274A: 3.5 g/t Au over 28.1 m , including 5.3 g/t Au over 17.8 m , including 23.1 g/t Au over 1.0 m and 11.4 g/t Au over 2.0 m MC26-271: 3.5 g/t Au over 19.0 m , including 8.3 g/t Au over 6.6 m , including 24.3 g/t Au over 1.0 m Highlights from Argus Main Argus Main is developing as a broad mineralized system: all three holes reported from the current step-out program returned multiple gold intervals, including higher-grade sections within wider envelopes. MC26-324: 1.0 g/t Au over 93.0 m , including 2.0 g/t Au o