This selection of multinational companies in Ontario includes large groups in banking, manufacturing, and software. Notable examples are Magna International, a developer of vehicle technologies; TD, RBC, Scotiabank, BMO and CIBC, all major Canadian banks; and Four Seasons, a global operator of luxury hotels. These companies employ tens of thousands of people each.
The data shows a strong concentration of headquarters in Toronto, which hosts the majority of these large multinational firms. Other cities like Aurora, Ottawa, and Waterloo also feature, representing sectors such as software development with Shopify and OpenText, and food manufacturing with McCain Foods.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Magna Internationalmagna.com
Developing technologies and systems to make vehicles safer and cleaner, focusing on community, environmental, and human benefits. |
158,000 | |||
| 2 |
TDcareers.td.com
A leading North American bank with a global presence, serving 22 million customers with a team of over 85,000 employees Providing legendary customer experiences |
105,476 | |||
| 3 | 99,801 | ||||
| 4 |
Scotiabankscotiabank.com
A global financial institution serving customers, families, and communities by providing advice, products, and services to help them achieve success |
87,065 | |||
| 5 | 60,290 | ||||
| 6 | 47,865 | ||||
| 7 |
Four Seasonsfourseasons.com
Global operator of over one hundred thirty luxury hotels, resorts, and fifty-five residential properties across forty-seven countries focused on high-end hospitality innovation. |
43,141 | |||
| 8 |
Thomson Reutersthomsonreuters.com
It offers news and information tools for professionals in legal, regulatory, and tax sectors, helping them navigate complex environments. |
36,640 | |||
| 9 |
Manulifemanulife.com
Global financial services group providing insurance, wealth management, and asset management solutions to millions of customers worldwide. |
34,375 | |||
| 10 |
Collierscolliers.com
Offers real estate services, engineering solutions, and investment management, focusing on client success and delivering strong financial returns. |
29,561 | |||
| 11 |
Canadian Tire Corporationcanadiantire.ca
Conglomerate offering retail products across various categories, financial services, and real estate management, also owning a technical outdoor brand. |
29,479 | |||
| 12 |
Department of National Defence/Ministère de la défense nationalecanada.ca
A government department in Canada responsible for defending national interests, contributing to international peace and security, and supporting the Canadian Forces |
28,747 | |||
| 13 |
Shopifyshopify.com
Provides trusted tools to start, grow, market, and manage a retail business of any size, powering millions of businesses across 175 countries. |
28,526 | |||
| 14 |
OpenTextopentext.com
It specializes in Information Management, assisting businesses of all sizes in securely capturing, governing, and exchanging information globally. |
22,990 | |||
| 15 |
McCain Foodsmccain.com
Global leader in prepared potato products, including French Fries and appetizers, focusing on quality, sustainability, and community impact. |
22,000 | |||
| 16 |
Intactintactfc.com
Providing insurance solutions to help individuals, businesses, and society thrive during good times and bounce back during challenging times |
21,693 | |||
| 17 |
Canadian Armed Forces | Forces armées canadiennesforces.ca
Offering over 100 trades, the organization provides world-class qualifications, competitive salaries, benefits, stability, and exciting opportunities for travel, adventure, and making a difference |
20,412 | |||
| 18 |
Celesticacelestica.com
Global leader in providing design, manufacturing, and supply chain solutions for aerospace, defense, communications, healthtech, and more, delivering innovative solutions for complex challenges |
16,022 | |||
| 19 |
Barrick Mining Corporationbarrick.com
A company focused on owning high-quality gold and copper assets, managed by top talent to provide strong returns and benefits to stakeholders |
15,486 | |||
| 20 |
TJX Canada – Winners, Marshalls, HomeSensejobs.tjx.com
A dynamic company offering diverse career opportunities in buying, planning, merchandising, marketing, and retailing, with a focus on quality and value |
14,141 | |||
| 21 | 11,326 | ||||
| 22 |
RBC Capital Marketsrbccm.com
Global investment bank providing specialized expertise in capital markets, banking, and finance to corporations, institutional investors, asset managers, and governments across international markets. |
11,098 | |||
| 23 |
KPMG Canadakpmg.com
Providing audit, tax, and advisory services to public, private, nonprofit, and public sector organizations across Canada with professionalism. |
10,017 | |||
| 24 |
Ontario Power Generationopg.com
Leading clean power generator advancing clean energy innovations, striving for a net-zero future with diverse electricity generation fleet in Ontario and the United States |
9,878 | |||
| 25 |
Restaurant Brands Internationalrbi.com
Operating global quick service restaurant brands including Tim Hortons, Burger King, Popeyes, Firehouse Subs, focusing on sustainable food, planet, and people outcomes. |
9,244 | |||
| 26 |
RBC Wealth Managementrbcwealthmanagement.com
Provides comprehensive wealth management, private banking, investment, and asset management solutions to high net worth individuals, families, and institutional clients across global markets. |
8,748 | |||
| 27 |
GFL Environmental Inc.gflenv.com
A leading North American provider of environmental services for solid waste, liquid waste, and soil remediation, focusing on customer service, safety, and compliance |
8,244 | |||
| 28 |
University of Guelphuoguelph.ca
Dedicated to improving quality of life through innovative research and education in essential areas like water, food, health, and environment |
7,725 | |||
| 29 |
Global Affairs Canada | Affaires mondiales Canadainternational.gc.ca
Manage diplomatic and consular relations, promote international trade, lead international development and humanitarian assistance efforts for Canada. |
7,379 | |||
| 30 |
Tim Hortonstimhortons.ca
Operates a large quick-service restaurant chain, offering diverse menu items to customers across Canada and North America, a beloved Canadian brand. |
6,960 | |||
| 31 |
Linamar Corporationlinktr.ee
Advanced manufacturing company specializing in solutions for vehicles, motion, work, and lives Comprised of Industrial and Mobility segments, with global reach and innovative products |
6,668 | |||
| 32 |
Apotex Inc.apotex.com
A global pharmaceutical company producing affordable high-quality medicines, with divisions focusing on generics, biosimilars, consumer products, and API manufacturing |
6,548 | |||
| 33 |
TD Securitiestdsecurities.com
A leading global provider of integrated capital markets products and services, offering underwriting, advisory, market access, transaction banking, and investment solutions |
6,544 | |||
| 34 | 6,379 | ||||
| 35 |
Aecon Group Inc.aecon.com
Provides integrated construction solutions for civil, urban transportation, nuclear, utility, and industrial sectors, plus project development, financing, investment, and operations. |
6,368 | |||
| 36 |
Maple Leaf Foods Incmapleleaffoods.com
A leading Canadian protein company producing high-quality food products under various brands, with a commitment to sustainability and positive online presence |
6,114 | |||
| 37 |
Manulife Wealth & Asset Managementmanulifeim.com
Global investment management, financial advice, and retirement planning services with tailored solutions and responsible investing across public and private markets. |
5,984 | |||
| 38 |
Martinrea Internationalmartinrea.com
Global automotive supplier focused on metal forming, aluminum casting, fluid systems, and assemblies to meet lightweight requirements Employs 18,000 people worldwide |
5,692 | |||
| 39 |
PwC Canadapwc.com
Delivering audit assurance, risk management, tax, and consulting services to build trust and solve complex business problems through collective industry expertise. |
5,523 | |||
| 40 |
BMO Capital Marketscapitalmarkets.bmo.com
A leading North American financial services provider offering a complete range of investment and corporate banking products to clients worldwide |
5,451 | |||
| 41 |
ATS Corporationatsautomation.com
A manufacturing solutions provider with global capabilities, specializing in custom automation systems for industries such as life sciences, food & beverage, transportation, and energy |
5,287 | |||
| 42 |
Agnico Eagle Mines Limitedagnicoeagle.com
A senior Canadian gold mining company with mines in Canada, Finland, Mexico, and Australia, focused on producing and exploring precious metals |
5,223 | |||
| 43 |
Royal Canadian Mounted Police | Gendarmerie royale du Canadarcmp.ca
A national police service in Canada, providing policing at international, federal, provincial, and municipal levels Offers diverse career opportunities and promotes community safety |
5,068 | |||
| 44 | 4,949 | ||||
| 45 |
BDO Canadabdo.ca
A leading provider of professional services in Canada, offering assurance, tax, and consulting services with a people-first approach to talent experience |
4,858 | |||
| 46 | 4,478 | ||||
| 47 |
Canadian Red Crossredcross.ca
An organization within the International Red Cross and Red Crescent Movement providing disaster relief, emergency response, prevention training, capacity building, and community health services |
4,268 | |||
| 48 |
Recipe Unlimited Corporationrecipeunlimited.com
Leader in Canada's full-service restaurant industry since 1883, franchising and operating iconic brands nationwide, with a focus on quality dining experiences |
4,240 | |||
| 49 |
CIBC Capital Marketscibccm.com
Providing support and expertise to help clients access capital, expand operations, and invest through tailored industry-leading solutions in financial markets globally |
4,231 | |||
| 50 |
Costco Wholesale Canadacostco.ca
Global retailer with warehouse club operations in 8 countries, known for quality, value, and ethical business practices Family-oriented atmosphere for employee success |
4,127 | |||
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. | |||||
| 51 |
Wilfrid Laurier Universitywlu.ca
Canadian university focusing on teaching, research, and student satisfaction with programs in arts, business, science, social work, and education. |
4,060 | |||
| 52 |
ABC Technologiesabctechnologies.com
A global leader in plastics and injection molding technology for the automotive industry, focusing on innovation, sustainability, and creating career opportunities |
4,059 | |||
| 53 |
D+Hfinastra.com
Merger of D+H and Misys creating Finastra, a leading global fintech company providing innovative financial technology solutions. |
4,037 | |||
| 54 | 3,941 | ||||
| 55 |
Perseus Group, Constellation Softwarecsiperseus.com
The company focuses on nurturing and growing businesses through data-driven guidance, permanent capital, and empowering general managers for maximum potential |
3,916 | |||
| 56 |
Revera Inc.reverainc.com
Leader in managing high quality senior living-focused real estate, with deep sector roots enriching residential experience for seniors in multiple countries |
3,631 | |||
| 57 |
CSA Testing & Certificationcsagroup.org
Development of safety and technical standards combined with global testing, inspection, and certification services for diverse industries. |
3,522 | |||
| 58 |
Avison Youngavisonyoung.us
Global real estate advisor creating value through collective intelligence, creativity, and agile thinking, with a focus on making a positive impact on people's lives |
3,517 | |||
| 59 |
Bill Gosling Outsourcingbillgosling.com
With over 65 years of experience, we specialize in building customized outsourced communication solutions to help brands reach their customers effectively |
3,435 | |||
| 60 |
Experior Financial Groupexperiorfinancial.com
A diverse, 100% Canadian-owned financial services organization with 3000+ licensed associates offering insurance and investment services, mentoring, and career advancement opportunities |
3,416 | |||
| 61 |
Libertyjobs.libertyenergyandwater.com
Provider of essential energy and water services, including clean, renewable power generation, with a focus on sustainability and customer satisfaction |
3,364 | |||
| 62 |
Geotabgeotab.com
Provides connected vehicle, asset management solutions. Leverages data analytics, AI to transform fleet performance, operations, reducing costs, driving efficiency for over 55,000 customers. |
3,167 | |||
| 63 |
Spin Masterspinmaster.com
Global children's entertainment company creating toys, digital games, and original content including popular brands and preschool franchises. |
3,140 | |||
| 64 |
1Password1password.com
Protects business data, employee accounts, and sensitive information with secure access, sharing, and integration into existing systems. |
3,074 | |||
| 65 |
Black & McDonald Limitedblackandmcdonald.com
Integrated multi-trade service provider delivering high-quality construction, facilities management, and technical solutions across North America with operational excellence. |
3,066 | |||
| 66 |
CI Financialcifinancial.com
An independent company providing global asset management and wealth advisory services with a focus on high-quality investments and innovative strategies |
3,051 | |||
| 67 |
Samuel, Son & Co.samuel.com
Family-owned integrated network providing metal manufacturing, processing, distribution, and value-added industrial products and services across North America. |
3,036 | |||
| 68 |
RBC Insurancerbcinsurance.com
A market leader in insurance, offering a wide range of life, health, home, auto, travel, and wealth solutions to individuals and groups across Canada Additionally, providing reinsurance solutions globally |
2,965 | |||
| 69 |
Harris Computerharriscomputer.com
Provides mission-critical software solutions for public sector, healthcare, utilities, and private sectors across North America, Europe, Asia, Australia. |
2,929 | |||
| 70 |
REDPATH MININGredpathmining.com
A global underground mining solutions provider, specializing in mine development, shaft sinking, production mining, raiseboring, and civil infrastructure development with a focus on ESG criteria |
2,840 | |||
| 71 |
Porter Airlines Inc.flyporter.com
Elevates economy air travel experience, providing genuine hospitality with style. Operates Embraer and De Havilland aircraft across North America, including Canada, US, Mexico, Caribbean. |
2,769 | |||
| 72 |
Livingston Internationallivingstonintl.com
Providing customs brokerage, trade consulting, global trade management, freight forwarding, and innovative automation technology solutions worldwide for businesses. |
2,735 | |||
| 73 |
H&R REIThr-reit.com
One of Canada's largest real estate investment trusts with a diverse portfolio of high-quality office, retail, industrial, and residential properties in North America |
2,677 | |||
| 74 |
Yamana Gold Inc.panamericansilver.com
Canadian-based gold producer with mining operations and development projects located throughout the Americas, focusing on responsible resource extraction. |
2,628 | |||
| 75 |
Multimaticmultimatic.com
A global enterprise specializing in supplying automotive components, systems, and engineering services with manufacturing divisions and engineering facilities worldwide |
2,598 | |||
| 76 | 2,564 | ||||
| 77 |
Compass Group Canadacompass-canada.com
Canada’s leading provider of foodservice and facilities management, offering specialized support services in addition to exceptional food offerings |
2,537 | |||
| 78 |
Element Fleet Managementelementfleet.com
Providing tailored fleet management solutions and expert support to reduce costs and simplify business operations across entire fleet lifecycles. |
2,504 | |||
| 79 |
Canada Goosecanadagoose.com
Design and promote an iconic lifestyle brand focused on inspiring people to live bravely outdoors while fostering diversity and inclusion. |
2,503 | |||
| 80 |
Scotiabank - Global Banking and Marketsgbm.scotiabank.com
A global wholesale bank providing expertise, experience, and dedication to meet business needs while adhering to social media disclaimer |
2,464 | |||
| 81 |
Faskenfasken.com
An international law firm with over 950 lawyers and offices on three continents, providing practical legal services for complex business and litigation challenges |
2,458 | |||
| 82 |
CPP Investments | Investissements RPCcppinvestments.com
Professional management organization investing in public and private equities, real estate, infrastructure, and fixed income to build financial security for Canadian retirees. |
2,417 | |||
| 83 |
ContactPoint 360contactpoint360.com
Partner with global brands to deliver AI-enhanced, human-centered customer experience solutions that drive sales, retention, and measurable ROI. |
2,361 | |||
| 84 |
IAMGOLD Corporationiamgold.com
An intermediate gold producer and developer with operating mines in North America and West Africa, focused on responsible mining practices and community development |
2,349 | |||
| 85 |
Shawcortenaris.com
A provider of solutions in the energy industry, recently acquired by Tenaris Visit Tenaris's LinkedIn page for more information |
2,342 | |||
| 86 | 2,325 | ||||
| 87 |
Kinaxiskinaxis.com
Empowering businesses to orchestrate their entire supply chain network, from long-term planning to real-time execution and delivery. |
2,322 | |||
| 88 |
PointClickCarepointclickcare.com
Leading healthcare technology platform providing collaboration and real-time insights throughout the patient healthcare journey for various healthcare providers and organizations |
2,311 | |||
| 89 |
Woodbridgewoodbridgegroup.com
Global provider of innovative solutions for automotive, commercial, recreational, packaging, healthcare, and building industries with headquarters in Canada and the USA |
2,262 | |||
| 90 |
Tutor Doctortutordoctor.com
A leading in-home education franchise offering personalized tutoring services in students' homes, with a focus on convenience, affordability, and success |
2,243 | |||
| 91 |
Canadian Solar Inc.csisolar.com
Global manufacturer of photovoltaic modules and inverters developing utility-scale solar power and battery energy storage projects with over 165 GW delivered worldwide. |
2,240 | |||
| 92 |
Lallemandlallemandplantcare.com
A global leader in yeast and bacterial products, focusing on natural fermentation processes in agri-food industries, with opportunities for growth and innovation |
2,232 | |||
| 93 |
RBC Investor Servicesrbcis.com
Provides investment servicing solutions to asset managers, owners, insurers, and financial institutions, focusing on asset protection and growth worldwide. |
2,230 | |||
| 94 |
Flynn Group of Companiesflynncompanies.com
Leading North American building envelope contractor offering roofing, glazing, metals, waterproofing services Seeking to merge with like-minded companies for growth opportunities |
2,229 | |||
| 95 | 2,224 | ||||
| 96 |
FGF Brandsfgfbrands.com
Innovative technology-driven bakery pushing boundaries with sustainable ingredients, creating delicious baked goods and disrupting the global food industry for the better |
2,195 | |||
| 97 | 2,185 | ||||
| 98 |
Altus Groupaltusgroup.com
A leading provider of asset and fund intelligence for commercial real estate, offering advanced analytics, technology, and advisory services globally |
2,168 | |||
| 99 |
Give and Go Prepared Foodsgiveandgo.com
A leading manufacturer of sweet baked goods, offering indulgent treats under various brands, with a focus on innovation and quality for global retailers |
2,143 | |||
| 100 |
Dilawri Group of Companiesdilawri.ca
A leading automotive group with 80 dealerships in Canada and the United States, representing 37 popular automotive brands since 1985 |
2,112 | |||
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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 11, 2026.
More company lists in Ontario
- The largest companies in Ontario 5,032
- Financial services firms in Ontario 396
- Manufacturers in Ontario 389
- Critical infrastructure operators in Ontario 344
- Retail chains in Ontario 327
- Companies with in-house R&D in Ontario 300
- Logistics companies in Ontario 285
- Education providers in Ontario 276
- SaaS companies in Ontario 275
- Truck Transportation companies in Ontario 270
- Transportation, Logistics, Supply Chain and Storage companies in Ontario 261
- Public sector organisations in Ontario 259
- Financial Services companies in Ontario 250
- IT Services and IT Consulting companies in Ontario 235
- Software Development companies in Ontario 231
- Healthcare providers in Ontario 226
- Hardware manufacturers in Ontario 213
- Professional services firms in Ontario 211
- Hospitals and Health Care companies in Ontario 205
- Distributors and wholesalers in Ontario 183
- Companies with a mobile app in Ontario 181
- Publicly traded companies in Ontario 156
- IT services companies in Ontario 156
- Subscription businesses in Ontario 153
The same list elsewhere in Canada
- Multinational companies in Canada 1,934
- Multinational companies in the province of Quebec 386
- Multinational companies in British Columbia 260
- Multinational companies in Alberta 240
- Multinational companies in Manitoba 42
- Multinational companies in Toronto 377
- Multinational companies in Montreal 203
- Multinational companies in Vancouver 138
- Multinational companies in Calgary 130
- Multinational companies in Mississauga 119
- Multinational companies in Edmonton 47
- Multinational companies in Ottawa 42
- Multinational companies in Markham 37
- Multinational companies in Vaughan 32
- Multinational companies in Winnipeg 32
- Multinational companies in Brampton 30
- Multinational companies in Richmond 27