O3 Mining
O3 Mining Inc. was a Canadian gold exploration and development company that consolidated a portfolio of mineral properties in Quebec, including Marban Alliance, Horizon, Alpha, Launay, and Kinebik, culminating in its acquisition by Agnico Eagle Mines for approximately $204 million in March 2025.
- Company typePrivate
- Founded1993
- HeadquartersToronto, Canada
- Headcount51–100
- GTM typeB2B
- OfferingServices
O3 Mining firmographics
Firmographics- Name
- O3 Mining
- Legal name
- O3 Mining Inc.
- Website
- https://o3mining.ca
- Company type
- Private
- Founded year
- 1993
- Operating status
- Acquired
- Headcount range
- 51–100 employees
- Short description
- O3 Mining Inc. was a Canadian gold exploration and development company that consolidated a portfolio of mineral properties in Quebec, including Marban Alliance, Horizon, Alpha, Launay, and Kinebik, culminating in its acquisition by Agnico Eagle Mines for approximately $204 million in March 2025.
- Ownership category
- akta.pro rank
O3 Mining industry classification
Industry- Product category
- Gold Exploration & Mining
- NAICS
- Other Metal Ore Mining (212290)
- SIC
- Gold And Silver Ores (1040)
- akta.pro primary industry
- Precious Metals Exploration & Project Development (IMAKAEAI)
Keywords
Where O3 Mining is headquartered
LocationHeadquarters
- HQ city
- Toronto
- HQ country
- Canada
- HQ region
- North America
Markets served
O3 Mining business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales
Distribution channels1 record
Marketing channels1 record
O3 Mining product offering
Product offeringCore offering
O3 Mining Inc. is a Canadian gold exploration and development company that operated a portfolio of mineral properties in Québec, Canada. Its core assets included the Marban Alliance (containing the Marban Engineering development-stage project), Kinebik, Horizon, Alpha, and Launay gold projects. The company's primary activity was advancing these exploration and development-stage properties through drilling, geological work, and resource estimation, ultimately culminating in its acquisition by Agnico Eagle Mines Limited in March 2025.
Product overview
O3 Mining Inc. is a Canadian gold exploration and development company that operated as a single unified portfolio of mining exploration assets in Québec, Canada. The company's core offering consisted of multiple gold exploration and development projects, including the Marban Alliance (which includes the Marban Engineering project with projected annual gold production of 161,000 ounces), Kinebik, Horizon, Alpha, and Launay. O3 Mining operated as a non-operating exploration-stage company focused on advancing its properties through drilling and development activities, ultimately being acquired by Agnico Eagle Mines Limited in March 2025 for approximately $204 million.
Differentiator
Problem solved
Functional benefit
Products and services
- Marban Alliance
- Marban Engineering Project
- Kinebik Project
- Horizon
- Alpha
- Launay
Quantifiable outcome
- Marban Engineering project estimated annual gold production of 161,000 ounces
Companies that use O3 Mining
Customer profileSegments1 record
Ideal customer profiles2 records
O3 Mining technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
O3 Mining partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Agnico Eagle MinesflagshipAgnico Eagle completed acquisition of 100% of O3 Mining in March 2025 through an amalgamation, making O3 Mining a wholly-owned subsidiary. The transaction valued at approximately $204 million consolidated O3 Mining's Marban Alliance property adjacent to Agnico Eagle's Canadian Malartic complex.
Scale indicators8 records
Recent moves7 records
Expansion highlights3 records
O3 Mining competitors and assessment
Company assessmentBroad incumbents
- Alamos Gold: Mid-tier Canadian gold producer with operations across North America and Turkey (Young-Davidson, Island Gold, Mulatos). Comparable as a Canadian gold mining company with diversified jurisdiction exposure and similar stage development projects.
- New Gold: Canadian-focused intermediate gold producer with assets in Ontario and British Columbia. Comparable as a Canada-centric gold company with a portfolio of producing and development-stage assets at a scale above O3 Mining but operating in the same Canadian mining ecosystem.
- IAMGOLD Corporation: Mid-tier Canadian gold producer with operating mines and a major development project (Côté Lake) in Ontario. Comparable as a Canadian-focused gold company spanning exploration through production, with overlapping Quebec/Ontario footprint and similar commodity exposure.
- Eldorado Gold: Canadian-headquartered gold producer with operations in Canada (Quebec), Turkey, and Greece. Comparable as a gold company with Canadian exploration roots and active development projects across multiple jurisdictions.
- Agnico Eagle Mines Limited: Senior Canadian gold producer that acquired O3 Mining in March 2025. Owner of the adjacent Canadian Malartic complex, with significant Quebec operating presence — represents both the acquirer and the most directly comparable operating peer in the same district.
Direct peers
- Argonaut Gold: Canadian gold mining company with producing assets in Ontario and Quebec (including the Magino project adjacent to Argonaut's operations). Comparable as a junior-to-mid-tier Canadian gold company focused on Quebec and northern Ontario assets at similar scale to O3 Mining's portfolio.
- Wesdome Gold Mines: Canadian-focused gold producer with operating mines in Ontario and Quebec (Eagle River, Kiena, Moss Lake). Highly comparable Canadian gold mining operator with overlapping Quebec exposure and a similar exploration-development-production pipeline.
- Osisko Mining: Canadian gold exploration and development company focused primarily on the Windfall project in Quebec. O3 Mining was the closest direct peer in the same Quebec gold camp, with Osisko similarly acquired by a major producer (Gold Fields) at a similar stage of development.
- Marathon Gold: Canadian gold development company with the Valentine Gold Project in Newfoundland advancing toward production. Comparable as a single-jurisdiction Canadian gold developer at the pre-production stage with similar capital-raising profile and project economics.
- Alexandria Minerals Corporation: Former Canadian gold exploration company focused on Quebec properties that was acquired by O3 Mining in 2019. Historically served as a comparable Quebec-focused gold explorer of similar scale and stage before consolidation.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat3 records
Key risks5 records
Key highlights5 records
Customer concentration
O3 Mining social profiles
Digital presenceO3 Mining financial estimates
Financial estimateRevenue estimate
Valuation estimate
O3 Mining leadership team
Management profileNumber of profiles
Profiles1 record
O3 Mining funding detail
Funding detailFunding overview
Funding rounds10 records
Investors3 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
O3 Mining M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about O3 Mining
What does O3 Mining do?
O3 Mining Inc. is a Canadian gold exploration and development company that operated a portfolio of mineral properties in Québec, Canada. Its core assets included the Marban Alliance (containing the Marban Engineering development-stage project), Kinebik, Horizon, Alpha, and Launay gold projects. The company's primary activity was advancing these exploration and development-stage properties through drilling, geological work, and resource estimation, ultimately culminating in its acquisition by Agnico Eagle Mines Limited in March 2025.
Is O3 Mining a public or private company?
O3 Mining is a private company. It is classified as corporate owned and is currently acquired.
When was O3 Mining founded?
O3 Mining was founded in 1993. It employs 51 to 100 people.
Where is O3 Mining based?
O3 Mining is headquartered in Toronto, Canada, in the North America region.
Who are O3 Mining's main competitors?
Broad incumbents on record are Alamos Gold, New Gold, IAMGOLD Corporation, Eldorado Gold and Agnico Eagle Mines Limited. Direct peers are Argonaut Gold, Wesdome Gold Mines, Osisko Mining, Marathon Gold and Alexandria Minerals Corporation.
Does O3 Mining have an API?
No public API is recorded for O3 Mining.
What industry is O3 Mining in?
O3 Mining's product category is Gold Exploration & Mining. Its primary akta.pro industry code is IMAKAEAI, Precious Metals Exploration & Project Development. Its NAICS code is 212290 and its SIC code is 1040.