Silver Bow Mining Added to Russell 3000, MicroCap Indexes
From IPO on May 1 to Russell Index inclusion June 26, the company is rapidly gaining visibility as one of the most diverse Critical Minerals deposits in the U.S.
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Butte, Montana · “The Richest Hill on Earth”
Advancing the historic silver-zinc veins of Butte, Montana
Silver Bow Mining aims to develop critical and precious metals resources through underground mining operations in Butte, Montana. We value transparency, sustainability and meaningful community impact throughout all aspects of our work.
170 Moz
AgEq inferred resource
S-K 1300 / NI 43-101
42
Veins in inferred Mineral Resource Estimate
above 1,000 ft
878 ac
Rainbow Block, mineral rights
patented claims
10
U.S.-designated Critical Minerals
incl. Ag, Zn, In
Heritage forward. Data backed.
Our plan for underground mine operations builds on Butte’s historic mining infrastructure with modern safety protocols and technologies. We aim to add the next chapter to Butte’s 150 years of mining history and create lasting economic value through responsible resource development.
For us, that chapter only counts if it benefits the community where we live and work: environmental protection and economic opportunity together, with modern methods that make the work safer and cleaner.
Flagship project
Rainbow Block
The Rainbow Block is approximately 878 acres of mineral rights located in historic North Butte and Walkerville, Montana. First given its moniker by early miners due to the great “Silver Bow” of veins visible on the surface that extend to depth.
The Butte mining district holds over 10,000 miles of tunnels. Our team has georeferenced and modeled the underground workings within the Rainbow Block.
AgAuZnPbCuInMnGeGaSbBi
Explore the Rainbow Block
Quick Facts
- ◆High-grade Au-Ag-Zn-Pb project on the "Richest Hill on Earth"
- ◆42 veins < 1,000 ft from surface within inferred Mineral Resource Estimate
- ◆~4,100 acres of private mineral concessions consolidated district-wide
- ◆Over 100 years of Anaconda Company mining & metallurgical data
- ◆Adjacent to operating open pit copper mine
- ◆MT DEQ Authorization to Proceed for surface and underground work (May 2026)
News & Media
View all news →Silver Bow Mining Reports Initial Assay Results from Drill Program
First drill results confirm significant Critical Minerals enrichment and vein extensions well beyond the current inferred Mineral Resource Estimate.
Read release →A Message from Travis Naugle: Letter to Silver Bow Mining Shareholders
Our first shareholder letter as a public company: vision, work programs, and priorities for building long-term shareholder value.
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150 years of mining historyThe Full Story: 1864 to Today
“The Richest Hill on Earth”
From the beginning of its history, the Butte Mining District produced over 10.8 Mt copper, 715 Moz silver, 2.5 Mt zinc and 2.9 Moz gold.
1874
First silver mining in Butte
1896
26% of world copper supply
1916
Silver-zinc vein era begins
2025
170 Moz AgEq inferred MRE
2026
NYSE American listing: SBMT
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