Lannister Mining, a gold exploration company

Basin Gulch, gold and silver in Montana

Lannister Mining is a mineral exploration company advancing the Basin Gulch gold and silver property in west-central Montana, where more than 320 historical drill holes have already outlined near-surface mineralization.

Last updated: November 2026. Published by Lannister Mining.

What is Lannister Mining?

Lannister Mining is a gold exploration company focused on one asset: the Basin Gulch property near Philipsburg, Montana. The property hosts near-surface oxide gold-silver mineralization, has seen more than 320 historical drill holes, and covers 1,107 hectares of patented and unpatented claims. Lannister Mining is working toward a maiden mineral resource estimate.

Read the Basin Gulch facts Download the USA investor presentation (PDF)Visit lannistermining.com

By the numbers

Basin Gulch at a glance

historical drill holes completed on the property: 320+
hectares in the consolidated land package: 1,107
patented mining claims forming the core: 11
unpatented mining claims surrounding the core: 53
of the property still unexplored: Two-thirds
by road from Butte, Montana, with year-round access: 1 hour

Figures as reported by Lannister Mining, as of November 2026.

Definition

What Lannister Mining is

Lannister Mining is a mineral exploration company. It explores for gold and silver at the Basin Gulch property in west-central Montana rather than operating a producing mine. Its job is to turn a large body of historical drilling into a modern, compliant picture of how much gold and silver the property holds.

The property sits in the historic Philipsburg Mining District, which led the US original silver boom in the late 1800s. It is primarily on patented land, hosted in oxides, and open at depth, along strike, and untested regionally.

Why it matters

What makes Basin Gulch different

Many exploration projects start from a blank map. Basin Gulch starts from more than 320 historical drill holes, with several long intercepts beginning right at surface. Lannister Mining says near-surface mineralization gives significant implied mine design optimization flexibility.

The company also points to a market view: there is a clear premium for NI 43-101 and S-K 1300 compliant gold and silver ounces in the USA. Basin Gulch has seen significant historical work, has not been mined out, and is located in what the company calls a premium jurisdiction.

Two-thirds of the property is still unexplored.

Lannister Mining on the Basin Gulch property

Gold exploration company

What does a gold exploration company like Lannister Mining do?

A gold exploration company finds, tests, and measures gold deposits so that they can one day be developed. Lannister Mining does this at Basin Gulch by building on historical drilling, confirming earlier results, and drilling into ground that has never been tested.

The milestone that matters most is a maiden mineral resource estimate. The company states that the Au-Ag mineralization at Basin Gulch is open in multiple directions and at depth, and that historical drilling and new work programs will be used in a future maiden mineral resource estimate. Future drilling will concentrate on additional mineralized target areas within the property.

For a deeper explanation of the exploration stage and how to value a gold exploration company, see our guide.

Historical drilling

Highlight drill intercepts at Basin Gulch

Historical drill hole intersections, as reported

Result	Interval length
1.8 g/t Au	over 162 meters (531.5 feet), from surface
0.66 g/t Au	over 326 meters (1,069.6 feet), from surface
3.2 g/t Au	over 72 meters (236.2 feet), from surface
156 g/t Au	over 3 meters (9.8 feet)
25 g/t Au	over 14 meters (45.9 feet)

Bar length shows each interval against the longest reported intercept, 326 meters. Three of the five highlights begin at surface, which is why near-surface oxide mineralization sits at the center of the Basin Gulch story.

These are historical results. Lannister Mining plans expansion and confirmation drilling before they can support a current resource.

See all drill and trench results

The path forward

How Lannister Mining plans to advance Basin Gulch

Step 1: Compile the historical record
Bring together the results of more than 320 historical drill holes and trenching across the core of patented claims, so every intercept can be checked and mapped.
Step 2: Confirm historical intercepts
Drill confirmation holes near historical holes to verify results such as 1.8 g/t gold over 162 meters from surface with current methods.
Step 3: Expand into open ground
Test the mineralization where it is open at depth and along strike, and move into the two-thirds of the property that has not been explored.
Step 4: Deliver a maiden mineral resource estimate
Use historical drilling and new work programs together in a future maiden mineral resource estimate for Basin Gulch.

Comparison

Lannister Mining compared with a producing gold miner

Lannister Mining, an exploration-stage company, compared by stage with a producing gold miner. Producer figures come from IAMGOLD's Q2 2026 results release.
Criterion	Lannister Mining (exploration)	IAMGOLD (producer)
Stage	Exploration, working toward a maiden resource	Producing gold mines
Main asset described	Basin Gulch, Montana: 1,107 hectares	Multiple operating mines
Gold produced	None reported	188,100 ounces in Q2 2026
Key evidence today	320+ historical drill holes	Quarterly production and guidance of 720,000 to 820,000 ounces
What moves value next	Confirmation and expansion drilling	Production, costs, and guidance delivery

Source for IAMGOLD figures: IAMGOLD Reports Second Quarter 2026 Results (Newsfile).

The team

Who is behind Lannister Mining?

Lannister Mining is driven by a team with many of the same co-founders or senior executives as K92 Mining, Fosterville South Exploration, Arena Minerals and Thesis Gold. CEO Jim Greig brings more than 25 years of experience advancing projects and was a founder of Thesis Gold, which advanced a 5 million ounce gold-silver project in British Columbia.

Meet the management team, board and advisors

For investors and exploration partners

Start with the Basin Gulch project facts, then read the June 2026 USA investor presentation. Investor briefing requests are handled through the Lannister Mining main website.

Read the Basin Gulch facts Download the USA investor presentation (PDF)Visit lannistermining.com

Questions investors and partners ask

Short answers from the full FAQ. Read all 47 questions.

What is Lannister Mining?: Lannister Mining is a mineral exploration company focused on the Basin Gulch gold and silver property in west-central Montana. The property has near-surface gold-silver mineralization, more than 320 historical drill holes, and a land package of 11 patented and 53 unpatented claims covering 1,107 hectares. The company is working toward a future maiden mineral resource estimate.See this answer in the FAQ
Is Lannister Mining a gold exploration company?: Yes. Lannister Mining is a gold exploration company: it explores for gold and silver at Basin Gulch rather than operating a producing mine. Its work centers on confirming and expanding historical drill results so they can support a future maiden mineral resource estimate. It does not report gold production or revenue from mining.See this answer in the FAQ
Where is the Basin Gulch property?: The Basin Gulch property is in west-central Montana, in the historic Philipsburg Mining District. It has year-round access from Philipsburg, Montana on paved and well-maintained gravel roads, and it sits about one hour from Butte. The Philipsburg district led the original US silver boom of the late 1800s.See this answer in the FAQ
How many holes have been drilled at Basin Gulch?: More than 320 historical drill holes have been completed at Basin Gulch. Lannister Mining plans to use that historical drilling, together with new work programs, toward a future maiden mineral resource estimate. Confirmation drilling of historical intercepts is part of that path, alongside expansion drilling into open ground.See this answer in the FAQ
Does Basin Gulch have a mineral resource estimate?: No current mineral resource estimate is presented on this site. Lannister Mining states that the property has potential to host a significant maiden mineral resource estimate after expansion and confirmation drilling of historical drill intercepts. Historical drilling and new work programs are planned to feed into that future estimate.See this answer in the FAQ
How do you value a gold exploration company?: Investors usually weigh the size and grade of the mineralization, whether a compliant resource exists, the jurisdiction, land tenure, the team’s track record, and funding. Before a resource exists, historical drilling and exploration upside carry more weight. For Lannister Mining, that means 320+ historical holes and two-thirds of Basin Gulch unexplored.See this answer in the FAQ
What should investors and partners do after reading about Basin Gulch?: Read the Basin Gulch project facts, then request the investor briefing. The USA investor presentation dated June 2026 is linked from the investors page of this site, and briefing requests are handled through the company’s main website, lannistermining.com. Lannister Mining is actively looking for investors and exploration partners for the property.See this answer in the FAQ