This selection of large companies in Ontario's chemical sector primarily comprises established firms in manufacturing and wholesale building materials, alongside significant players in mining and motor vehicle manufacturing. ArcelorMittal Dofasco, with 3136 employees, produces sustainable steel products, while Shawcor provides solutions in the energy industry. IPEX by Aliaxis focuses on building materials, and Petro-Canada Lubricants supplies high-performance lubricants globally.
A notable characteristic among these companies is the concentration of headquarters in Toronto, indicating a central hub for industrial and manufacturing operations within the province. Other prominent companies include Plasman, a global leader in automotive components, and IKO North America, which manufactures roofing and waterproofing products.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
ArcelorMittal Dofascodofasco.arcelormittal.com
Leading manufacturer in North America's supply chain, producing sustainable steel products for automotive, energy, packaging, and construction industries, prioritizing employees and community engagement |
3,136 | |||
| 2 |
Shawcortenaris.com
A provider of solutions in the energy industry, recently acquired by Tenaris Visit Tenaris's LinkedIn page for more information |
2,342 | |||
| 3 |
IPEX by Aliaxisipexna.com
The company prioritizes honesty, fairness, integrity, and customer satisfaction through a customer-first culture, innovation, and long-term thinking in business |
2,085 | |||
| 4 |
Petro-Canada Lubricantspetrocanadalubricants.com
The company supplies over 350 high-performance lubricants, fluids, and greases worldwide, catering to a variety of industries and applications to optimize equipment performance and reliability |
1,799 | |||
| 5 |
Plasmanplasman.com
Global leader in automotive components, offering single-source solutions for tooling, injection molding, chroming, and assembly with a collaborative mindset and unrivaled dedication |
1,751 | |||
| 6 |
IKO North Americaiko.com
Manufacturing and supplying roofing, waterproofing, and insulation products for residential and commercial markets across North America and Europe. |
1,451 | |||
| 7 |
Chemtradechemtradelogistics.com
A publicly traded chemical manufacturing and handling company based in Toronto, operating in North America and Brazil, providing industrial chemicals and services to various industries |
1,242 | |||
| 8 |
Westlake Royal Building Productswestlakeroyalbuildingproducts.com
Leading manufacturer and distributor of high-quality exterior building materials for home remodeling, construction, and municipal projects with a focus on innovation and customer relationships |
1,109 | |||
| 9 |
Votorantim Cimentos North America (VCNA)votorantimcimentos.com
Leading provider of cement, concrete and aggregates in North America, part of a global building materials and sustainability solutions provider |
1,044 | |||
| 10 |
Sherritt International Corporationsherritt.com
A global leader in mining nickel and cobalt, creating innovative environmental solutions for oil and mining industries, and a major energy producer |
934 | |||
| 11 |
The Woodbridge Groupwoodbridgegroup.com
Innovative urethane and bead foam technologies for automotive and other industries worldwide, providing comfort, safety, acoustics, insulation, and structural solutions Offering diverse services |
915 | |||
| 12 |
CCL Industries
Manufacturing labels, specialty media, digital printing software, aluminum aerosol cans, plastic tubes, instructional leaflets, and precision metal components for various markets. |
835 | |||
| 13 |
Greenfield Globalgreenfield.com
Global supplier of high-purity alcohols, specialty solvents, and renewable fuels, facilitating sustainability through innovative solutions for various industries worldwide |
655 | |||
| 14 |
ROCKWOOL North Americarockwool.com
Manufacture and supply sustainable stone wool insulation products for building construction, industrial, and technical applications across North America. |
542 | |||
| 15 |
DCL Corporationpigments.com
Global leader in color pigments and dispersions for coatings, plastics, and ink industries, with recent acquisition expanding specialty product offerings |
494 | |||
| 16 |
CRH Canadacrhcanada.com
Leading producer and supplier of construction products and services across Canada, with a focus on innovation, sustainability, and commitment to local communities |
450 | |||
| 17 |
ERCO Worldwideercoworldwide.com
A global leader in Chlorine Dioxide technology, ERCO Worldwide focuses on sustainable chemical solutions to enhance lives and the environment |
443 | |||
| 18 |
Walker Industrieswalkerind.com
A family-owned company offering high-performance products and services in industries such as renewable energy, waste disposal, aggregates, and road construction |
422 | |||
| 19 | 372 | ||||
| 20 | 338 | ||||
| 21 |
CpK Interior Products Inc.cpkip.com
A global leader in interior products, specializing in precision manufacturing and innovative solutions for original equipment manufacturers and Tier One suppliers |
334 | |||
| 22 |
Terrapure Environmentalterrapureenv.com
A leading provider of battery recycling solutions that partners with manufacturers to achieve a 99% recycling rate and produce high-quality recycled materials |
334 | |||
| 23 |
AirBoss of Americaairboss.com
A group of businesses specializing in rubber compounding, engineering, and military products, offering innovative solutions and high-quality rubber products for various applications |
327 | |||
| 24 |
McAsphalt Industries Limitedlinktr.ee
A Canadian leader in asphalt production, distribution, services, and technology with a wide range of products and a focus on customer satisfaction |
323 | |||
| 25 |
Vision Extrusions Groupvisionextrusionsgroup.com
A leading company in the North American extrusion industry with over 40 years of experience, state-of-the-art facilities, and a focus on innovation and creativity |
268 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Multymultyhome.com
Innovating in the circular economy by transforming landfill-bound waste into new, sustainable products for home, garden, and industry |
233 | |||
| 27 |
EHC GLOBALdrakaehc.com
Leading manufacturer of handrails, rollers, and lift components for vertical transportation systems worldwide, committed to safety, innovation, and sustainability |
230 | |||
| 28 |
Toronto Research Chemicalslgcstandards.com
A leading manufacturer and supplier of specialized complex organic small molecules for researchers in the biomedical field worldwide |
193 | |||
| 29 |
Resilient Structuresresilient-structures.com
Specializing in designing and engineering innovative utility structures, this industry pioneer creates resilient and sustainable solutions to mitigate natural disasters and environmental harm |
184 | |||
| 30 |
Trusscoretrusscore.com
Material science innovator focused on developing sustainable building materials to change building practices and reduce environmental impact Recognized for award-winning products |
181 | |||
| 31 |
Siltech Corporationsiltech.com
Siltech specializes in developing, manufacturing, and marketing a wide range of organo-functional silicone compounds for various industries, focusing on innovation and customer partnerships |
169 | |||
| 32 |
Neo Performance Materialsneomaterials.com
Manufacturer of advanced industrial materials essential for sustainable technologies, including magnetic powders, specialty chemicals, metals, and alloys for various everyday and emerging products |
157 | |||
| 33 | 148 | ||||
| 34 |
Saand Inc.saand.ca
Premier architectural glass fabricator offering high-quality glass solutions in North America, specializing in commercial IGU's, back painted glass, laminated, heat-treated, and CNC customized products |
141 | |||
| 35 |
NMC Dynaplas Torontonationalmolding.com
A leading high-precision injection molder specializing in complex plastic components for automotive suppliers, with expertise in thermoplastics, lightweight solutions, and global supply |
99 | |||
| 36 |
Nudura Insulated Concrete Formsnudura.com
The company specializes in providing innovative products and services for stronger, energy-efficient, comfortable, and eco-friendly residential and commercial buildings |
83 | |||
| 37 |
ENERGI Fenestration Solutionsenergifenestration.com
Specializing in window systems and patio doors, this company offers exceptional technical expertise in extrusion, assembly, quality control, and custom solutions for fabricators |
68 | |||
| 38 |
Core Molding- Cobourg, Canadacoremt.com
Specializing in custom plastic molding, this company offers cost-efficient alternatives for individuals and businesses, producing high-quality plastic parts for various industries |
58 | |||
| 39 |
H. B. Fullerhbfuller.com
A global provider of adhesives, sealants, structural foams, and specialty chemicals for a wide range of finished goods in various industries |
52 | |||
| 40 |
Dustbane Products Ltd.dustbane.ca
A leading Canadian manufacturer of sustainable cleaning products and equipment, distributing through top-tier commercial and industrial distributors, focused on customer experience and innovation |
48 | |||
| 41 |
QM Groupqmigroup.com
This company specializes in plastic injection molding for automotive, marine, and recreational industries, offering a range of services including painting and gas tank manufacturing |
47 | |||
| 42 |
RAMPF Composite Solutions (CAN)rampf-group.com
A leading expert in manufacturing carbon fiber and fiberglass composites for aerospace and medical industries, offering vertical integration and innovative solutions |
43 | |||
| 43 |
Ritz Plastics Inc.ritzplastics.com
A privately owned business based in Peterborough, Ontario, Canada, established in 1984 Specializing in manufacturing for automotive, medical, consumer goods, and electronics industries ISO/TS-16949:2009 certified |
39 | |||
| 44 |
Evocoevocoltd.com
Innovative company utilizing plant-based chemistry for sustainable, high-performing product development |
38 | |||
| 45 |
XYG North Americaxygna.com
Global leader in integrated glass manufacturing with 35+ years of experience, 140+ country reach, 17,000+ employees, and 13 manufacturing complexes producing high-quality glass products for various applications |
36 | |||
| 46 |
SofSURFACES Inc.sofsurfaces.com
This company specializes in designing, manufacturing, and installing interior and exterior rubber surface tiles for playgrounds, fitness facilities, and other applications worldwide |
33 | |||
| 47 |
Equispheres Inc.equispheres.com
The company specializes in developing advanced materials for additive manufacturing technologies to accelerate adoption and drive innovation across various industries |
30 | |||
| 48 |
Cestoil Chemical Inc.cestoil.com
A global leader in specialty chemicals, focusing on fuel additives, process additives, and advanced materials to enhance efficiency and product quality |
30 | |||
| 49 | 27 | ||||
| 50 |
NCH Canada Inc.nch.com
Global leader in industrial and commercial product manufacturing and distribution, prioritizing quality, safety, and innovation to meet clients' needs worldwide |
22 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
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