Onyx Gold expands its Munro-Croesus Project to 109 km² with two new property acquisitions, including the Munro Property—covering strike extensions of the Croesus Flow - key host rock to the high-grade past-producing Croesus Mine and nearby GM Vein discovery. Details:

Onyx Gold’s 227 km² Yukon land package includes 2 standout targets at King Tut: • Golden Mask – 2.3 x 1.5 km gold-in-soil footprint • Ra – sheeted veins, up to 25.1 g/t Au at surface 2025 exploration planning is ongoing. onyxgold.com/projects/yukon/ $ONYX.V #Yukon #Gold

Onyx Gold hits 91.0m @ 1.8 g/t Au incl. 17.0m @ 5.3 g/t Au at Argus North Munro-Croesus Project Timmins Ontario. Broad zones of strong mineralization are now confirmed over 100 vertical metres—and remains open in all directions. Only 4 of 17 holes reported to date. More:

Big step forward at Argus North. CEO Brock Colterjohn breaks down new drill results at Munro-Croesus: • 91.0m @ 1.8 g/t Au incl. 17.0m @ 5.3 g/t • 59.7m @ 2.5 g/t Au incl. 18.7m @ 5.2 g/t • Mineralization now confirmed over 100 vertical metres Watch the update:

Onyx Gold is expanding the Munro-Croesus Project with strong drill results and key land acquisitions. Highlights: • 91.0m @ 1.8 g/t Au incl. 17.0m @ 5.3 g/t Au • Land package grows to 109 km² along the Croesus Flow Drilling continues. onyxgold.com/news-releases $ONYX.V $ONXGF

Onyx Gold’s 227 km² Yukon portfolio is in close proximity to the North Canol Rd, with >C$50M in gov’t & U.S. DoD infrastructure funding announced. Located just 50 km from Snowline’s 8.8Moz Valley discovery, in the heart of Canada’s next major gold district. $ONYX.V $ONXGF #Yukon

On site at Argus North: CEO Brock Colterjohn shares an update from our 10,000m Phase 1 drill program in Timmins. Step-outs from discovery hole MC24-163 (69.6m of 3.4 g/t Au) are defining scale and geometry. $ONYX.V $ONXGF #TimminsGoldCamp #GoldExploration #JuniorMining

Darwin Green, Exec Chairman of Onyx Gold, joined Yukon Metals at THE Mining Investment Event 2025 to discuss discovery potential in Canada’s North. Key topics: geology, ESG, access, and 2025 catalysts. Watch the full panel: youtube.com/watch?v=mM0N3l… $Onyx.V #InvestYukon

Onyx Gold (TSXV: ONYX | OTCQX: ONXGF) is the top-performing junior gold stock on the TSXV in 2025 with an 856.5% YTD gain to $2.20 (July 8). Backed by strategic acquisitions and standout drill results at Munro-Croesus, Onyx is advancing exploration an aggressive exploration

Onyx Gold is attending Invest Yukon in Dawson City, July 11–14. CEO Brock Colterjohn will be meeting with investors, corporates & government reps as we advance our 227 km² Yukon portfolio in the emerging Tombstone Gold Belt. More: onyxgold.com/projects/yukon/ #Gold #InvestYukon

New interview with Onyx Gold CEO Brock Colterjohn and Antonio (Resource Talks) Get insight on the Argus North discovery (69.6m @ 3.4 g/t Au), GM Vein, Timmins strategy & Yukon upside. Watch here: youtube.com/watch?v=5apn-D… $ONYX.V #Gold #Timmins #Yukon #MiningStocks

Nicole Hoeller represented Onyx Gold at CEM Kelowna this past weekend, connecting with retail investors energized by the Argus North discovery—69.6m @ 3.4 g/t Au incl. 9.5m @ 13.9 g/t Au. Drilling continues at Munro-Croesus as momentum builds. Learn more: onyxgold.com

Onyx Gold (TSX-V: ONYX | OTCQX: ONXGF) expands Argus North with 52.2m @ 2.2 g/t Au and 50.4m @ 1.9 g/t Au starting just 4m from surface. Zone now defined over 200 vertical meters with continuity and remains open in all directions. Drill program increased to 25,000m. Excavator

From discovery to a 25,000m program—Argus North is delivering. 7 of 9 holes exceed 90 g*ms, incl.: • 69.6m @ 3.4 g/t (236.6 gms) • 91.0m @ 1.8 g/t (163.8 gms) • 59.7m @ 2.5 g/t (149.3 gms) Zone now traced to surface with 200m vertical continuity. More results coming.

Want the full story behind Onyx Gold’s Argus North discovery? CEO Brock Colterjohn sits down with Goldfinger Capital to discuss drill results, property acquisitions, hungry mills in Timmins, and what’s next for $ONYX.V. Watch the full interview: youtube.com/watch?v=6ZNNrn…

Have you seen the latest from $ONYX.V? Argus North keeps delivering: • 52.2m @ 2.2 g/t & 61.3m @ 1.5 g/t (MC25-178) • 66.8m @ 1.4 g/t (MC25-179) • 50.4m @ 1.9 g/t - 4 m vertically from surface (MC25-180) Drill program expanded to 25,000m. Read more: onyxgold.com/onyx-gold-inte…

Looking to stay current on Onyx Gold’s latest drill results and exploration strategy? Our July 2025 Corporate Presentation highlights progress across our Timmins and Yukon projects. View it here: onyxgold.com/investors/inve… $ONYX.V $ONXGF #GoldExploration #TimminsGoldCamp

Onyx Gold CEO Brock Colterjohn joined Mining Stock Daily to discuss the Argus North discovery, recent high-grade drill results, and what’s ahead for exploration at Munro-Croesus. Listen here: clearcommodity.net/podcasts/minin… $ONYX.V $ONXGF #Timmins #GoldExploration #Mining

Onyx Gold (TSX-V: ONYX | OTCQX: ONXGF) has expanded its drill program at Munro-Croesus from 10,000 to 25,000m following success at Argus North. Drilling will focus on step-outs at Argus North, the Argus Zone, high-grade GM Vein, and more across the 109 km² project. Details:

Over the past 5 years, Onyx Gold has strategically consolidated 109 km² at Munro-Croesus through 28+ acquisitions. This cohesive land package now hosts 3 gold discoveries and 35+ targets along 8 km of the Pipestone Fault in the Timmins Gold Camp. onyxgold.com $ONYX.V