Argenta Silver Corp. is pleased to report the fourth set of assay results from its ongoing 2025–2026 diamond drilling campaign at the El Quevar Project in Salta Province, Argentina. The latest results highlight significant high-grade silver mineralization at the Mani-Copan and Argentina exploration targets, located 800 meters and 1,500 meters respectively, from the eastern edge of the current Mineral Resource, which hosts 45.3 million ounces of silver from 2.93 million tonnes grading 482 g/t Ag, and an inferred resource of 4.1 million ounces from 0.31 million tonnes grading 417 g/t Ag (1).  See Figure 1, Figure 2, Table 1, and Table 2. Notably, drill hole QVD-444 at Mani-Copan intercepted 1,385 g/t Ag over 4.0 meters, successfully validating high-grade results previously identified from surface samples. Furthermore, the Company has discovered a new, previously untested mineralized zone at the Argentina target, where all drill holes have encountered high-grade silver. These findings significantly expand the known mineralized footprint and underscore the vast, district-scale potential of the El Quevar Project.

Highlights*:

High-Grade Intercept at Mani-Copan:

• Hole QVD-444: Intersected 1,385 g/t Ag over 4.0m (from 271.0m to 275.0m). This high-grade interval confirms the continuity of mineralization at the Mani-Copan target, and the results are consistent with surface values obtained at the target, as announced in previous press releases. This validates the potential of Mani-Copan to host high-grade mineralization.

New Discovery at Argentina Target:

• Hole QVD-448: Returned multiple mineralized intervals, including a high-grade hit of 725 g/t Ag over 3.0m (from 78.0m to 81.0m). 
• Hole QVD-450: Demonstrated broad mineralization with 134 g/t Ag over 18.0m (from 181.0m to 199.0m), including higher-grade internal of 245 g/t Ag over 4.0m (from 189.0m to 193.0m).

*Intervals shown are core length. Estimated true widths vary between 60 to 85% of core reported length. Insufficient re-modelling and drill density on new data has been completed to calculate true width at this time. 

Exploration Upside at Andrea Target:

• Drilling in the Andrea zone (Holes QVD-437 and QVD-441) returned anomalous silver values, confirming the presence of a mineralized system and providing key data for further targeting in this area.

Joaquin Marias, President, Chief Executive Officer, and Director of Argenta Silver Corp., commented:
“These results reinforce the emerging district-scale potential at El Quevar. The high-grade intercept at Mani-Copan confirms meaningful silver mineralization beyond the current resource envelope, while consistent high-grade results at the Argentina target further expand the footprint of the system. Importantly, Mani-Copan and the Yaxtché deposit share a comparable geochemical signature; however, Mani-Copan is distinguished by exceptionally high-grade surface samples, a characteristic not observed at the Yaxtche Deposit. With two rigs active, more than 14,500 metres completed, and additional assays pending, we are systematically advancing El Quevar to define the full scale of this silver system.”

Table 1: 2025-2026 Summer Drilling Program Fourth Batch of Assays (cut-off 100 g/t Ag) *

*Intervals shown are core length. Estimated true widths vary between 60 to 85% of core reported length. Insufficient re-modelling and drill density on new data has been completed to calculate true width at this time. 

Table 2: 2025-2026 Summer Drilling Program DDH Location and Attitude*

*Reference system: GK POSGAR 94 – Zone 3. Dip is reported as negative below horizontal.

2025–2026 Exploration and Drilling Program

Since launching on November 1, 2025, the current drilling campaign continues with two rigs operational at El Quevar. The Company continues to pursue a dual-track growth strategy: 40% of the Program targets Resource Expansion to strengthen the existing resource base, while the remaining 60% is focused on unlocking new discoveries beyond the existing footprint. 

To date, the Company has successfully completed over 14,500 meters across 61 holes, representing more than half of the total 25,000-meter program. Laboratory analysis is well underway; over 300 work orders have been submitted, with 40% of these results currently pending. This work supplements the 4,244 meters across 16 holes drilled during the successful 2025 Winter Drilling Program, which achieved a balance of high-grade Resource Expansion and the discovery of promising exploration targets such as Andrea, Rosa, Argentina, and Azufre.

The discovery of a new mineralized zone at the Argentina target, situated more than 1.5 kilometers from the eastern edge of the current Mineral Resource, significantly expands the known mineralized footprint of the El Quevar Project. This emerging zone is headlined by high-grade intercepts of 725 g/t Ag over 3.0m and 134 g/t Ag over 18.0m. When coupled with results from the Mani-Copan target—located over 800 meters to the south of Yaxtché, where drilling returned an exceptional 1,385 g/t Ag over 4.0m—these findings underscore the vast, district-scale potential of the property. Furthermore, anomalous silver values identified at the Andrea target continue to provide the Company with critical geological vectors to refine future drilling across this expansive system.

About El Quevar Project

The El Quevar Project is located in Salta, Argentina and spans an area of 57,000 hectares. The property remains underexplored with less than 3 % of the area covered with comprehensive exploration work. The property boasts exceptional infrastructure with over 60 km of internal roads, a fully owned, fully operational camp for 100 workers with multiple support buildings, and a railroad, gas pipeline, and service road just 3 km from camp, while a high-voltage transmission line lies approximately 20 km from the exploration area. The robust infrastructure associated with the project provides a cost-effective platform to de-risk and accelerate future drilling and development.

The foundational Mineral Resource Estimate of the Yaxtché deposit boasts an indicated mineral resource of 45.3 million ounces of silver from 2.93 million tonnes grading 482 g/t Ag, and an inferred resource of 4.1 million ounces from 0.31 million tonnes grading 417 g/t Ag (1). The mineral resource area remains open at depth and in multiple directions, particularly to the southeast and northwest. 

The mineralization at the Yaxtché deposit is defined as a silver rich, high to intermediate-sulphidation epithermal system with associated gold. Mineralization is controlled by NW-SE and NE-SW fault structures and is mainly hosted in brecciated zones and dacite domes. Silver minerals at Yaxtché consist of complex silver sulphides, sulphosalts and native silver. These minerals are found within silicified breccias, commonly appearing as veinlets, stockworks, disseminations, and breccia fillings.