Sun Silver Announces Maverick Springs Mineral Resource Increase of 59Moz to 539Moz AgEq at 71g/t AgEq

Sun Silver (OTCQX: SSLVF) reported a material update to its Maverick Springs project on Dec 9, 2025: the inferred Mineral Resource Estimate rose by 59 Moz AgEq to a total of 539 Moz AgEq at an average grade of 71 g/t AgEq.

Rhea-AI Summary

Sun Silver (OTCQX: SSLVF) reported a material update to its Maverick Springs project on Dec 9, 2025: the inferred Mineral Resource Estimate rose by 59 Moz AgEq to a total of 539 Moz AgEq at an average grade of 71 g/t AgEq.

The increase follows re-assays and extensional drilling during the 2025 program, marking the company's third resource upgrade in under two years and leaving the deposit open along strike and at depth.

Positive

• Resource increase of 59 Moz AgEq to 539 Moz AgEq
• Average grade raised to 71 g/t AgEq
• Third resource upgrade in less than two years

Negative

• Resource is reported in the inferred category, which carries higher uncertainty

Argus Dec 9 session

+3.39% close to close Open Argus

Details

News Market Reaction – SSLVF

On Dec 9, the day this news came out, SSLVF closed 3.39% above the previous close.

Data tracked by StockTitan Argus for the Dec 9 session.

Key Figures

Resource increase: 59 Moz AgEq Total resource: 539 Moz AgEq Previous resource: 479.8 Moz AgEq +3 more

Resource increase

59 Moz AgEq

Increase in inferred Mineral Resource Estimate at Maverick Springs

Total resource

539 Moz AgEq

Updated inferred Mineral Resource Estimate at Maverick Springs

Previous resource

479.8 Moz AgEq

Prior inferred Mineral Resource Estimate before update

Average grade

71 g/t AgEq

Average grade of updated Maverick Springs resource

Two-year increase

85%

Increase in Maverick Springs resource over past two years

Distance to Elko

85 km

Distance from Maverick Springs to Elko, Nevada

Historical Context

2 past events · Latest: Dec 09

2 events

1. Dec 09

   Resource upgrade

   24h Move

   +3.4%

   Inferred resource increased to 539 Moz AgEq at higher 71 g/t grade.

2. Nov 11

   Exploration update

   24h Move

   +9.9%

   Near-surface antimony mineralization confirmed within existing silver-gold footprint.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Key Terms

mineral resource estimate, inferred, jorc, g/t

4 terms

mineral resource estimate technical

"reported an updated Mineral Resource Estimates for the project"

A mineral resource estimate is a calculated approximation of how much metal or mineral material likely exists in a particular deposit and where it sits underground, similar to estimating how many cookies are in a jar by peeking at the layers. It matters to investors because it provides a data-based starting point for judging a project's potential value, future production and risks, while not guaranteeing recoverable or profitable amounts.

inferred technical

"the total inferred MRE increasing by 59Moz"

Inferred means a conclusion or piece of information drawn from available clues rather than directly observed or confirmed. For investors, an inference is like reading a weather forecast from cloud patterns: it helps form expectations about a company’s performance or risks when hard data is missing, but it carries uncertainty and should be weighed alongside verified facts.

jorc technical

"Here is a link to the full details on the upgraded JORC resource"

An internationally recognized reporting standard for mining that sets rules on how companies must estimate and disclose the amount and quality of mineral resources and ore reserves. Think of it as a recipe and safety checklist that forces consistent, independently verifiable estimates about what is in the ground; investors use JORC-compliant reports to compare projects, judge how reliable the numbers are, and assess the financial and operational risk of a mining investment.

g/t technical

"Resource to 539Moz AgEq at a higher grade of 71g/t AgEq"

g/t stands for grams per tonne, a measure of how many grams of a metal—most often gold or other precious metals—are contained in one metric tonne of rock or ore. Investors use it to judge how “rich” a mineral deposit is: higher g/t means more metal per amount of material to process, which can make mining cheaper and projects more likely to be profitable—like measuring teaspoons of sugar per cake to gauge sweetness value.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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ELKO, Nev., Dec. 9, 2025 /PRNewswire/ -- Sun Silver Ltd. (ASX: SS1; OTCQX: SSLVF) announced that the company's strategic exploration that included re-assays and extensional drilling, has expanded the company's Maverick Springs Silver and Gold Project in Nevada. The company has reported an updated Mineral Resource Estimates for the project with the total inferred MRE increasing by 59Moz from 479.8Moz to 539Moz silver equivalent.

Here is a link to the full details on the upgraded JORC resource: 2924-03035083-6A1302317&v=undefined

"Delivering our third resource upgrade in less than two years and highlights Maverick Springs' emergence as one of the most strategically important undeveloped silver assets in the United States," said Andrew Dornan, Managing Director of Sun Silver. "This 2025 drill program and extensive re-assay work have added a further 59Moz AgEq, increasing the Resource to 539Moz AgEq at a higher grade of 71g/t AgEq, an 85% increase in the past two years."

Dornan added that with silver now on the U.S. Critical Minerals list and China moving to restrict exports, the need for secure Western supply has never been clearer. "Maverick Springs is exceptionally positioned to support domestic U.S. supply as we continue to expand and increase confidence in a system that remains open to the north and south," he affirmed.

Sun Silver (https://www.sunsilver.com.au) is developing the Maverick Springs Project, which is located 85km from the fully serviced mining town of Elko in Nevada and is surrounded by several world-class gold and silver mining operations, including Barrick's Carline Mine. Nevada is a globally recognized mining jurisdiction that was rated as the Number 1 mining jurisdiction in the world by the Fraser Institute in 2022. The deposit itself remains open along strike and at depth, with multiple mineralized intercepts located outside of the current Resource constrained model.

View original content:https://www.prnewswire.com/news-releases/sun-silver-announces-maverick-springs-mineral-resource-increase-of-59moz-to-539moz-ageq-at-71gt-ageq-302636062.html

SOURCE Sun Silver Ltd.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What change did Sun Silver (SSLVF) announce for Maverick Springs on Dec 9, 2025?

Sun Silver announced the inferred MRE increased by 59 Moz AgEq, to 539 Moz AgEq at 71 g/t AgEq.

How much did Maverick Springs' grade change in the 2025 update for SSLVF?

The updated resource reports an average grade of 71 g/t AgEq following the 2025 program.

Does the Dec 2025 Maverick Springs update for SSLVF change the resource classification?

The announcement describes the total as an inferred Mineral Resource Estimate; no reclassification to higher categories was reported.

What exploration work added the 59 Moz AgEq to SSLVF's Maverick Springs resource?

The company cited re-assays and extensional drilling during the 2025 program as the drivers of the increase.

Is Maverick Springs still open for expansion after the SSLVF Dec 2025 update?

Yes; the deposit is reported as open along strike and at depth with multiple mineralized intercepts outside the current model.

Where is Sun Silver's Maverick Springs project located and why is location relevant to SSLVF investors?

Maverick Springs is 85 km from Elko, Nevada, near world-class operations, supporting regional infrastructure and jurisdictional strength.