December 2025: A Recap of Prismo Metals’ Exploration Progress

Dear Prismo Metals community,

The initial phase will target the historic Silver King mine, testing the upper half of the mineralized body and the surrounding stockwork left behind by previous miners. To begin drilling, we are awaiting the drill permit to be issued by the Forest Service, a federal entity part of the Department of Agriculture of the U.S. government.

We have recently found additional compelling exploration targets in recent weeks, including the Black Diamond copper-gold replacement target and the newly named Copper King porphyry intrusion target, both on the east side of the project.

Just this week, we announced compelling new assay results from our sampling program. We identified high-grade copper (up to 6.02% copper) at Black Diamond and, significantly, high-grade gold (up to 5.19 g/t gold) in stockwork veining at the Copper King target. These results, combined with our IP survey, which has already identified multiple resistivity and chargeability anomalies, are giving us a robust pipeline of drill targets.

For those new to Prismo Metals, let me summarize Silver King for you:

Silver King is a historic high-grade silver, copper and base metals producer:

• Discovered in 1875, became one of the most important mines in Arizona

• Produced high grade silver in two main periods:

• 1875-89, nearly 6 million ounces of silver at average head grades of 61oz/ton to 21 oz/ton silver with significant copper, lead and zinc values

• 1918-28, produced over 230,999 oz silver with a head grade of 18.7 oz/ton

• No significant production after 1928

• No recent modern exploration

The Silver King project is uniquely positioned:

• Located near Superior, AZ and 3 km from the main Resolution Copper shaft.

• Resolution is a joint venture between BHP and Rio Tinto, which owns the largest unmined copper deposit in the world (1.5 billion tons at 1.56% Cu)

• Silver King is entirely surrounded by Resolution Copper

• Silver King is hosted by the same rock sequence that hosts the nearby Resolution copper deposit, but has the advantage to be exposed at surface and is not covered by the thick sequence of unmineralized volcanic rocks that covers Resolution

• The host rocks from the nearly Magma mine are exposed on the eastern portion of the

In 2026, we will see a major ramp up in exploration with Multiple Milestones on the Horizon:

• Obtain Silver King Drill Permit

• Forest Service permit expected shortly

• Select & secure the driller for drill campaign at Silver King

• Start drilling at Silver King

• 2,000 meters in two phases

• Near the mine is the priority

• Drill the newly discovered polymetallic vein and copper area

• Dewatering of the Silver King Mine

• Underground exploration targeting high-grade zones

• Possible bulk sample

• Continued Exploration

• Ripsey Mine: Detailed mapping and sampling

• Unlock value from the Hot Breccia project and drill in 2026

This drill program is supported by an exciting portfolio. Our recent success at the Ripsey Project, where we confirmed high-grade gold and silver over a 600-meter strike, remains a key value driver. Crucially, Ripsey sits on patented land, granting us the distinct advantage of not requiring federal drill permits for future work there. Meanwhile, our option extension at the Hot Breccia Project provides us with the strategic flexibility to continue partnership discussions for our permitted 5,000-meter copper drill program.

We are rapidly advancing our projects during a historic surge for our key metals. Silver has soared over 100% to $60/oz, fueled by a projected 95-million-ounce deficit, while copper hit record highs above $11,400/tonne, driven by AI and green energy demand. This simultaneous bull market is compelling major producers to urgently secure new supply. With high-grade assets in Arizona and Mexico, Prismo is strategically positioned to capitalize on these deficits and deliver North American critical minerals.

We are energized, funded, and committed to unlocking the potential of these high-grade Arizona projects. We invite you to follow our progress closely by visiting our website at www.prismometals.com and subscribing to our newsletter.

Warm regards,

Alain Lambert

CEO of Prismo Metals

Gordon Aldcorn

President of Prismo Metals