Ontario Limestone Company Ltd.

What Ontario Limestone Company Ltd. does

Ontario Limestone Company Ltd. is a privately held Canadian dimensional stone producer based in Orillia, Ontario. The company operates a single quarry on the Gull River geological formation and extracts dolomitic limestone for use in construction and landscaping applications. Its product portfolio includes stair treads, building stone, armour stone, flagstone, coping, sills, pier caps, and wallstone — categories typically deployed in residential, commercial, and public-sector building projects. The single-site footprint is the only operating location disclosed.

The go-to-market is sales-led with a direct-to-consumer element: prospective buyers obtain pricing through a quote-based process rather than fixed published rates, and orders are specified to the dimensions required by the end use. The operation appears vertically integrated from extraction through finishing, with in-house finishing capability referenced in customer-facing material. The source data does not disclose headcount, financial scale, ownership structure, distribution partnerships, or capital structure beyond the existence of a company website used for product display and quote requests. There are no references to proprietary software, automation systems, or AI capability; the technology base is conventional quarrying and stone-finishing equipment.

The customer base is segmented across three end markets — residential, commercial, and public/government projects — with no named anchor customers disclosed in the available material. The single-quarry footprint, geographic concentration in central Ontario, and absence of disclosed subsidiaries, M&A activity, or external funding rounds indicate a small-scale, owner-operated industrial business.

Name

Ontario Limestone Company Ltd.

Legal name

Ontario Limestone Company Ltd.

Website

https://ontariolimestonecompany.ca

Company type

Private

Operating status

Operating

Short description

Ontario Limestone Company Ltd. is a privately held Canadian dimensional stone producer operating a single dolomitic limestone quarry on the Gull River formation in Orillia, Ontario, supplying building stone, armour stone, flagstone, stair treads, and related products to residential, commercial, and public-sector projects.

Ownership category

akta.pro rank

Product category

Dimensional Limestone Products

NAICS

Dimension Stone Mining and Quarrying (212311), Cut Stone and Stone Product Manufacturing (327991), Stone Mining and Quarrying (21231)

SIC

Cut Stone & Stone Products (3281), Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400)

akta.pro primary industry

Limestone Quarrying (Industrial & Construction Grade) (IMAKAHAC)

akta.pro secondary industry

Other Dimension Stone (Slate, Sandstone, Quartzite, Travertine) Quarrying & Fabrication (IMAKAHAF)

Keywords

• Dimensional limestone products
• Stone quarry operations
• Landscaping stone supply
• Hardscape materials
• Natural building stone

Headquarters

HQ city

Orillia

HQ country

Canada

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Infrastructure, Marketing or Sales, Personnel, Technology or R&D

Revenue model

1. Dimensional Limestone Product Sales: One-time sales of dimensional limestone products including stair treads, building stone, armour stone, flagstone, coping, sills, and pier caps. Products are sold directly to customers for residential, commercial, and public landscaping/construction projects. Pricing is quote-based rather than publicly listed.
2. Transportation Services: The company can arrange transportation to project sites depending on quantity and weight of orders, providing delivery as an ancillary service to product sales.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels3 records

Core offering

Ontario Limestone Company Ltd. operates a dolomitic limestone quarry in Orillia, Ontario, producing and supplying dimensional stone products for architectural, hardscaping, and landscaping applications. The product portfolio includes sawn and natural stair treads, building stone (veneer and full bed), armour stone (guillotined, sawn bed face, natural), coping, sills, flagstone (square cut and jumbo), wallstone, and pier caps. Stone is sourced and manufactured in Canada with multiple finish options including sawn, sandblasted, bush-hammered, and flamed surfaces.

Product overview

Ontario Limestone Company Ltd. is a Canadian dolomitic limestone quarry and manufacturer offering a portfolio of dimensional stone products for residential, commercial, and public landscaping and architectural projects. The product line includes sawn and natural stair treads, building stone (veneer and full bed), various armour stone types (guillotined, sawn bed face, natural), coping, sills, flagstone (square cut and jumbo), and wallstone. All products are sourced and manufactured at their quarry located north of Orillia, Ontario, on the northern edge of the Gull River geological formation. The company does not offer crushed limestone or installation services, but can arrange transportation and provide contractor referrals. Stone finish options include sawn, sandblasted, bushammered, and flamed surfaces.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Limestone weighs approximately 175 lbs per cubic ft

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Scale indicators2 records

Recent moves3 records

Expansion highlights3 records

Direct peers

• Polycor: Canadian-headquartered natural stone quarrier and fabricator with operations across North America, including limestone, granite, and marble. Directly comparable in extracting and finishing dimensional stone for architectural and hardscape use, though at much larger scale.
• Coldspring: US-based quarrier and fabricator of natural stone (granite, limestone, marble) for architectural, memorial, and commercial applications. Comparable in offering cut, finished dimensional stone products with in-house surface processing to building and landscape end markets.
• Indiana Limestone Company: One of North America's largest limestone dimension stone producers, supplying cut Indiana limestone for architectural and building applications. Comparable as a quarrier-and-fabricator of limestone building stone serving commercial and residential construction.
• Beachville Lime Works: Historic Ontario limestone operation producing lime and limestone products from a single quarry. Comparable as an Ontario-based single-site limestone producer, though focused on industrial lime rather than architectural dimensional stone.
• Eden Stone Company: Wisconsin-based quarry and fabricator of dolomitic and limestone dimensional stone (building stone, flagstone, outcroppings, cut stone). Highly comparable in product mix, geology-driven moat, and target customer base of landscape architects, masons, and residential/commercial builders.

Emerging players

• Kafka Granite: Wisconsin-based specialty dimensional stone and aggregate producer serving landscape and architectural markets. Comparable in offering cut/finished natural stone products (sawn flagstone, cut walls, dimensional stone) to landscape contractors and architects.

Broad incumbents

• Lafarge Canada (Holcim): Canadian arm of a global building materials giant producing cement, aggregates, and concrete. Comparable as a large-scale Ontario quarrier serving construction end markets, though focused on cement and aggregate rather than dimensional stone products.
• Walker Industries: Ontario-based diversified minerals and construction materials company with aggregate, emulsion, and environmental operations. Comparable as an Ontario-located extractive business serving construction end markets, though it operates in aggregates rather than dimensional stone.
• CRH Canada: Canadian operations of a global building materials group producing aggregates, asphalt, and ready-mix concrete. Comparable as a major Ontario minerals operator serving construction customers, though not in the dimensional stone niche.

Regional players

• Nelson Aggregate Co. Ontario-based aggregate producer supplying sand, gravel, and crushed stone to construction markets in central Ontario. Comparable as a regionally-licensed quarry operator in the same province, though focused on aggregate rather than dimensional stone.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

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 Ontario Limestone Company Ltd.