Thunder Mountain Gold

What Thunder Mountain Gold does

Thunder Mountain Gold Inc. (OTCQB: THMG; TSX-V: THM) is a US-incorporated, publicly-traded junior mineral exploration and development company headquartered in Boise, Idaho, with a stated history dating to 1935. The company controls a portfolio of three properties: the flagship South Mountain Mine in Owyhee County, Idaho (a high-grade, advanced-stage underground polymetallic deposit rich in zinc, silver, gold, copper, and lead with NI 43-101 and SK-1300 compliant resources and over 8,000 feet of accessible existing underground workings); the adjacent South Mountain Complex land package (over 13,061 acres targeting Carbonate Replacement Deposit, Cu-Mo Porphyry, and Gold Breccia Zone style mineralization); and the Trout Creek Project in Nevada's Battle Mountain-Eureka Trend targeting Carlin-type or epithermal gold.

The company's technology approach combines geological mapping, geochemical sampling, Magnetotelluric (MT) geophysical surveys, and Leapfrog 3D modeling for resource definition. As of late 2025/early 2026, approximately US$25 million has been invested in the South Mountain Project since its 2007 acquisition, supported by over 60,000 feet of modern drilling data.

Thunder Mountain Gold is pre-revenue and does not sell products commercially; it monetizes through future production (planned for 2026 via toll-milling and ore concentrate pathways with partners MFD Investment Holdings and Ocean Partners USA), while currently funding operations via non-brokered private placements to accredited investors (approximately US$4.37 million raised across three placements in December 2024, May 2025, and October 2025). Its customer base comprises accredited investors in the short term and prospective mining offtakers/processors in the medium term. Go-to-market is direct investor relations through private placement, newswire distribution (Newsfile Corp), SEC filings, and a downloadable corporate pitch deck, with expected 2026 revenue from silver, zinc, gold, copper, and lead production at the South Mountain Mine.

Name

Thunder Mountain Gold

Legal name

Thunder Mountain Gold Inc.

Website

https://thundermountaingold.com

Company type

Public

Founded year

1935

Operating status

Operating

Headcount range

1–10 employees

Short description

Thunder Mountain Gold is a pre-revenue junior mineral exploration and development company (OTCQB: THMG; TSX-V: THM) focused on advancing its flagship South Mountain polymetallic mine in Idaho toward 2026 production, alongside the South Mountain Complex and Trout Creek gold projects.

Ownership category

akta.pro rank

Product category

Mineral Exploration and Mining Development

NAICS

Gold Ore and Silver Ore Mining (212220), Support Activities for Metal Mining (213114)

SIC

Gold And Silver Ores (1040), Metal Mining (1000)

akta.pro primary industry

Precious Metals Exploration & Project Development (IMAKAEAI)

akta.pro secondary industries

Copper Exploration & Resource Development (IMAKADAA), Mine Surveying & Geospatial Services (Survey, Drone/LiDAR, GIS, Grade Control) (IMAKAKAK), Silver Mining (IMAKAEAB)

Keywords

• Mineral exploration services
• Polymetallic mining development
• Precious metals projects
• Critical minerals production
• Underground mine advancement

Headquarters

HQ city

Boise

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Others

Revenue model

1. Mineral Production (Future): Pre-revenue junior exploration company. Anticipated revenue from production of silver, zinc, gold, copper, and lead from the South Mountain Mine. The company is evaluating near-term production options including toll-milling and ore concentrate production targeting potential commencement in 2026.
2. Private Placement Financing: Equity and warrant financing through non-brokered private placements to accredited investors. Multiple placements completed in 2024-2025 totaling approximately US$4.37 million.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Thunder Mountain Gold is a junior mineral exploration and development company advancing the South Mountain Mine, a high-grade underground polymetallic deposit in Owyhee County, Idaho, rich in silver, zinc, gold, copper, and lead, with over 8,000 feet of existing accessible underground workings and NI 43-101 / SK-1300 compliant resource estimates. The company also controls the adjacent South Mountain Complex exploration land package targeting Carbonate Replacement Deposits and porphyry copper-molybdenum mineralization, plus the Trout Creek Project, an early-stage gold target in Nevada's Battle Mountain-Eureka Trend. The company is pre-revenue and primarily funds exploration through equity private placements while targeting near-term production in 2026 via toll-milling and ore concentrate offtake arrangements.

Product overview

Thunder Mountain Gold is a U.S.-based mineral exploration and development company positioned as North America's near-term producer of critical and precious metals. The company's portfolio consists of three core mining projects: the South Mountain Mine (flagship advanced-stage polymetallic underground deposit in Idaho with over 8,000 feet of existing underground workings), the adjacent South Mountain Complex (district-scale exploration land package targeting CRD and porphyry mineralization), and the Trout Creek Project (early-stage gold exploration in Nevada's Battle Mountain-Eureka Trend). The company trades on OTCQB (THMG) and TSX-V (THM) exchanges.

Differentiator

Problem solved

Functional benefit

Products and services

• South Mountain Project Flagship advanced-stage underground polymetallic deposit located in Owyhee County, Idaho, featuring high-grade mineralization rich in silver, zinc, gold, copper, and lead, with over 8,000 feet of accessible historical underground workings providing near-term production potential and NI 43-101 / SK-1300 compliant resource estimates.
• South Mountain Complex Large, highly prospective land package surrounding the South Mountain Mine offering exploration upside and district-scale discovery potential, focused on Carbonate Replacement Deposits (CRD), Cu-Mo Porphyry style mineralization, and the Gold Breccia Zone target with surface rock chip samples yielding up to 5.8 ppm Au.
• Trout Creek Project Early-stage gold exploration target in Nevada's Battle Mountain-Eureka Trend, with potential for Carlin-type or epithermal gold deposits, positioned near major gold producers including I-80 Gold Corp.'s Cove-McCoy Project and Nevada Gold Mines' Phoenix Complex.

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core and minor.

• MFD Investment Holdings SAcoreStrategic or Co-development Partner · 8 December 2025MFD Investment Holdings SA has entered the options review phase for near-term production at Thunder Mountain Gold's South Mountain Mine in collaboration with Ocean Partners USA. The evaluation includes processing pathways, toll-milling solutions, ore concentrate production, and scoping-level commercial evaluation with potential operations targeted for 2026.
• Ocean Partners USA, Inc.coreStrategic or Co-development Partner · 8 December 2025Ocean Partners USA, Inc. is collaborating with MFD Investment Holdings and Thunder Mountain Gold on near-term production options at the South Mountain Mine, including evaluation of toll-milling and ore concentrate production scenarios.
• Big Sky ExplorationminorOthersContracted drilling company conducting the 10,000-foot exploration drilling program at South Mountain using Boart Longyear LF90D coring drill rig.

Scale indicators14 records

Recent moves6 records

Expansion highlights6 records

Regional players

• i-80 Gold Corp: Gold-focused junior with adjacent operations at the Cove-McCoy Project, directly neighboring Thunder Mountain's Trout Creek Project in Nevada's Battle Mountain-Eureka Trend. Highly relevant geographic and geological peer.

Broad incumbents

• McEwen Mining Inc. US-listed gold and silver producer with Nevada and Ontario operations. COO Ron Espell held senior leadership there, and it offers a comparable mid-tier gold/silver peer profile.
• Barrick Gold Corporation: One of the world's largest gold producers with significant Nevada operations including the Battle Mountain-Eureka district near Trout Creek. Relevant as a major-incumbent peer with overlapping executive alumni (Ron Espell).
• Hecla Mining Company: Established US-based silver and base metals producer with polymetallic operations including the Greens Creek mine (Alaska). Multiple Thunder Mountain executives came from Hecla, and it represents the most relevant established comparable given overlapping silver/zinc/gold focus and US operating footprint.
• Coeur Mining: US-listed precious metals producer with a silver-dominant polymetallic portfolio. Director Jim Sabala was previously CFO of Coeur, and the company's focus on silver-rich deposits makes it a comparable incumbent.

Direct peers

• Americas Gold and Silver Corporation: Mid-tier silver-zinc producer with operations including the Galena Complex in Idaho's Silver Valley, immediately adjacent to Thunder Mountain's operating geography. Comparable polymetallic silver/zinc profile and US-listed junior status.
• Excellon Resources Inc. Junior silver-zinc-lead producer/developer with the Platosa mine in Mexico. Comparable small-cap silver-dominant polymetallic operator with similar exploration-to-production challenges.
• SilverCrest Metals Inc. Recent silver/gold producer that advanced the Las Chispas mine from exploration to production, offering a relevant peer template for Thunder Mountain's path from junior explorer to near-term producer.
• First Cobalt Corp. Canadian-listed critical minerals developer that acquired U.S. Cobalt (co-founded by Thunder Mountain Director Doug Glaspey). Relevant as a junior critical-minerals development peer with overlapping board talent.
• MAG Silver Corp. Silver-focused exploration and development company with the Juanicipio project in Mexico. Comparable as a junior silver developer with single high-grade polymetallic asset advancing toward production.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/thundermountain.gold

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds5 records

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Thunder Mountain Gold