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The 100 largest multinational companies in Ontario

Tamtam tracks 901 multinational companies headquartered in Ontario. This list ranks the 100 largest by number of employees on LinkedIn, led by Magna International, TD and RBC. Their median headcount is 4,127. Half of them were founded in 1982 or later. The most common headquarters are Toronto (59), Ottawa (9) and Mississauga (8).

🇨🇦 Ontario100 companiesUpdated Nov 11, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
Magna Internationalmagna.com

Developing technologies and systems to make vehicles safer and cleaner, focusing on community, environmental, and human benefits.

Motor Vehicle Manufacturing 🇨🇦 Aurora 158,000 1957
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

Banking 🇨🇦 Toronto 105,476 n/a
3
RBCrbc.com

Global financial institution focused on delivering leading performance through innovative solutions, exceptional client experiences, and community support initiatives in various countries

Banking 🇨🇦 Toronto 99,801 n/a
4
Scotiabankscotiabank.com

A global financial institution serving customers, families, and communities by providing advice, products, and services to help them achieve success

Banking 🇨🇦 Toronto 87,065 n/a
5
BMObmo.com

Financial institution offering banking services, career growth opportunities, learning programs, and a supportive culture for personal and professional success.

Financial Services 🇨🇦 Toronto 60,290 n/a
6
CIBCcibc.com

Providing reliable financial products/services with innovative tools, dedicated to helping clients achieve their goals Cultivating a culture of trust, teamwork, and accountability

Banking 🇨🇦 Toronto 47,865 n/a
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.

Hospitality 🇨🇦 Toronto 43,141 1961
8
Thomson Reutersthomsonreuters.com

It offers news and information tools for professionals in legal, regulatory, and tax sectors, helping them navigate complex environments.

Software Development 🇨🇦 Toronto 36,640 n/a
9
Manulifemanulife.com

Global financial services group providing insurance, wealth management, and asset management solutions to millions of customers worldwide.

Insurance 🇨🇦 Toronto 34,375 n/a
10
Collierscolliers.com

Offers real estate services, engineering solutions, and investment management, focusing on client success and delivering strong financial returns.

Real Estate 🇨🇦 Toronto 29,561 n/a
11
Canadian Tire Corporationcanadiantire.ca

Conglomerate offering retail products across various categories, financial services, and real estate management, also owning a technical outdoor brand.

Retail 🇨🇦 Toronto 29,479 n/a
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

Armed Forces 🇨🇦 Ottawa 28,747 n/a
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.

Software Development 🇨🇦 Ottawa 28,526 2006
14
OpenTextopentext.com

It specializes in Information Management, assisting businesses of all sizes in securely capturing, governing, and exchanging information globally.

Software Development 🇨🇦 Waterloo 22,990 1991
15
McCain Foodsmccain.com

Global leader in prepared potato products, including French Fries and appetizers, focusing on quality, sustainability, and community impact.

Food and Beverage Manufacturing 🇨🇦 Toronto 22,000 1957
16
Intactintactfc.com

Providing insurance solutions to help individuals, businesses, and society thrive during good times and bounce back during challenging times

Insurance 🇨🇦 Toronto 21,693 1809
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

Armed Forces 🇨🇦 Ottawa 20,412 n/a
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

Technology, Information and Internet 🇨🇦 Toronto 16,022 1994
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

Mining 🇨🇦 Toronto 15,486 1983
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

Retail 🇨🇦 Mississauga 14,141 1982
21
Hatchhatch.com

Global network of professionals dedicated to developing innovative solutions in metals, energy, infrastructure, digital, and investments sectors for lasting success and positive change worldwide

Professional Services 🇨🇦 Mississauga 11,326 1955
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.

Investment Banking 🇨🇦 Toronto 11,098 n/a
23
KPMG Canadakpmg.com

Providing audit, tax, and advisory services to public, private, nonprofit, and public sector organizations across Canada with professionalism.

Financial Services 🇨🇦 Toronto 10,017 n/a
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

Utilities 🇨🇦 Toronto 9,878 1999
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.

Food and Beverage Services 🇨🇦 Toronto 9,244 2014
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.

Financial Services 🇨🇦 Toronto 8,748 1869
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

Environmental Services 🇨🇦 Vaughan 8,244 n/a
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

Higher Education 🇨🇦 Guelph 7,725 1964
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.

Government Administration 🇨🇦 Ottawa 7,379 1909
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.

Food and Beverage Services 🇨🇦 Toronto 6,960 1964
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

Motor Vehicle Manufacturing 🇨🇦 Guelph 6,668 1966
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

Pharmaceutical Manufacturing 🇨🇦 Toronto 6,548 n/a
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

Investment Banking 🇨🇦 Toronto 6,544 n/a
34
BGISbgis.com

Global leader in integrated facility management services, managing over 50,000 facilities worldwide, including data centers, government and healthcare facilities, and industrial assets

Facilities Services 🇨🇦 Markham 6,379 1992
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.

Construction 🇨🇦 Toronto 6,368 n/a
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

Food and Beverage Manufacturing 🇨🇦 Mississauga 6,114 n/a
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.

Financial Services 🇨🇦 Toronto 5,984 n/a
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

Motor Vehicle Manufacturing 🇨🇦 Vaughan 5,692 2001
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.

Business Consulting and Services 🇨🇦 Toronto 5,523 n/a
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

Investment Banking 🇨🇦 Toronto 5,451 n/a
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

Automation Machinery Manufacturing 🇨🇦 Cambridge 5,287 1978
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

Mining 🇨🇦 Toronto 5,223 1957
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

Law Enforcement 🇨🇦 Ottawa 5,068 n/a
44
EXPexp.com

A global firm providing engineering, architecture, design, and consulting services, with a history dating back to 1906 and over 3,000 professionals delivering successful projects worldwide

Civil Engineering 🇨🇦 Brampton 4,949 1906
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

Financial Services 🇨🇦 Toronto 4,858 1921
46
MDA Spacemda.space

Global leader providing robotics, communications satellites, geointelligence, and space exploration infrastructure through engineering excellence for defense and commercial missions across the world.

Defense and Space Manufacturing 🇨🇦 Brampton 4,478 1969
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

Non-profit Organizations 🇨🇦 Ottawa 4,268 n/a
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

Hospitality 🇨🇦 Vaughan 4,240 n/a
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

Capital Markets 🇨🇦 Toronto 4,231 n/a
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

Wholesale 🇨🇦 Ottawa 4,127 1983

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51
Wilfrid Laurier Universitywlu.ca

Canadian university focusing on teaching, research, and student satisfaction with programs in arts, business, science, social work, and education.

Higher Education 🇨🇦 Waterloo 4,060 n/a
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

Motor Vehicle Manufacturing 🇨🇦 Toronto 4,059 1974
53
D+Hfinastra.com

Merger of D+H and Misys creating Finastra, a leading global fintech company providing innovative financial technology solutions.

IT Services and IT Consulting 🇨🇦 Toronto 4,037 n/a
54
Mitelmitel.com

It powers over 2 billion daily connections, assisting businesses in connecting, collaborating, and providing customer care effectively.

Telecommunications 🇨🇦 Kanata 3,941 1972
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

Software Development 🇨🇦 Markham 3,916 2004
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

Real Estate 🇨🇦 Toronto 3,631 1961
57
CSA Testing & Certificationcsagroup.org

Development of safety and technical standards combined with global testing, inspection, and certification services for diverse industries.

Public Safety 🇨🇦 Toronto 3,522 1919
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

Real Estate 🇨🇦 Toronto 3,517 n/a
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

Outsourcing and Offshoring Consulting 🇨🇦 Barrie 3,435 1955
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

Financial Services 🇨🇦 Guelph 3,416 2014
61
Libertyjobs.libertyenergyandwater.com

Provider of essential energy and water services, including clean, renewable power generation, with a focus on sustainability and customer satisfaction

Utilities 🇨🇦 Oakville 3,364 1988
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.

Software Development 🇨🇦 Oakville 3,167 2000
63
Spin Masterspinmaster.com

Global children's entertainment company creating toys, digital games, and original content including popular brands and preschool franchises.

Manufacturing 🇨🇦 Toronto 3,140 n/a
64
1Password1password.com

Protects business data, employee accounts, and sensitive information with secure access, sharing, and integration into existing systems.

Computer and Network Security 🇨🇦 Toronto 3,074 2005
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.

Construction 🇨🇦 Toronto 3,066 1921
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

Financial Services 🇨🇦 Toronto 3,051 n/a
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.

Manufacturing 🇨🇦 Oakville 3,036 1855
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

Insurance 🇨🇦 Mississauga 2,965 n/a
69
Harris Computerharriscomputer.com

Provides mission-critical software solutions for public sector, healthcare, utilities, and private sectors across North America, Europe, Asia, Australia.

Software Development 🇨🇦 Ottawa 2,929 1976
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

Mining 🇨🇦 North Bay 2,840 1962
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.

Airlines and Aviation 🇨🇦 Toronto 2,769 2006
72
Livingston Internationallivingstonintl.com

Providing customs brokerage, trade consulting, global trade management, freight forwarding, and innovative automation technology solutions worldwide for businesses.

International Trade and Development 🇨🇦 Toronto 2,735 1945
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

Real Estate 🇨🇦 Toronto 2,677 1996
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.

Mining 🇨🇦 Toronto 2,628 2003
75
Multimaticmultimatic.com

A global enterprise specializing in supplying automotive components, systems, and engineering services with manufacturing divisions and engineering facilities worldwide

Motor Vehicle Manufacturing 🇨🇦 Markham 2,598 1984
76
TMX Grouptmx.com

Operate global capital and commodity markets, providing technology-driven solutions for businesses, investors, and traders to raise capital and prosper.

Financial Services 🇨🇦 Toronto 2,564 n/a
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

Food and Beverage Services 🇨🇦 Mississauga 2,537 n/a
78
Element Fleet Managementelementfleet.com

Providing tailored fleet management solutions and expert support to reduce costs and simplify business operations across entire fleet lifecycles.

Financial Services 🇨🇦 Toronto 2,504 1946
79
Canada Goosecanadagoose.com

Design and promote an iconic lifestyle brand focused on inspiring people to live bravely outdoors while fostering diversity and inclusion.

Retail Apparel and Fashion 🇨🇦 Toronto 2,503 1957
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

Banking 🇨🇦 Toronto 2,464 n/a
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

Law Practice 🇨🇦 Toronto 2,458 n/a
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.

Financial Services 🇨🇦 Toronto 2,417 1997
83
ContactPoint 360contactpoint360.com

Partner with global brands to deliver AI-enhanced, human-centered customer experience solutions that drive sales, retention, and measurable ROI.

Outsourcing and Offshoring Consulting 🇨🇦 Toronto 2,361 2007
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

Mining 🇨🇦 Toronto 2,349 1991
85
Shawcortenaris.com

A provider of solutions in the energy industry, recently acquired by Tenaris Visit Tenaris's LinkedIn page for more information

Manufacturing 🇨🇦 Toronto 2,342 n/a
86
Rootsroots.com

A lifestyle brand founded in 1973, known worldwide for premium leather goods, apparel, and accessories, with retail locations in Canada, the US, and Asia

Retail Apparel and Fashion 🇨🇦 Toronto 2,325 1973
87
Kinaxiskinaxis.com

Empowering businesses to orchestrate their entire supply chain network, from long-term planning to real-time execution and delivery.

Software Development 🇨🇦 Ottawa 2,322 n/a
88
PointClickCarepointclickcare.com

Leading healthcare technology platform providing collaboration and real-time insights throughout the patient healthcare journey for various healthcare providers and organizations

Software Development 🇨🇦 Toronto 2,311 2000
89
Woodbridgewoodbridgegroup.com

Global provider of innovative solutions for automotive, commercial, recreational, packaging, healthcare, and building industries with headquarters in Canada and the USA

Motor Vehicle Manufacturing 🇨🇦 Mississauga 2,262 1978
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

Education Administration Programs 🇨🇦 Toronto 2,243 2000
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.

Renewable Energy Semiconductor Manufacturing 🇨🇦 Kitchener 2,240 2001
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

Food and Beverage Manufacturing 🇨🇦 Rexdale 2,232 n/a
93
RBC Investor Servicesrbcis.com

Provides investment servicing solutions to asset managers, owners, insurers, and financial institutions, focusing on asset protection and growth worldwide.

Financial Services 🇨🇦 Toronto 2,230 2006
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

Construction 🇨🇦 Mississauga 2,229 1978
95
SOTIsoti.net

Global provider of enterprise software solutions for mobile operations, offering a comprehensive platform for managing various devices and building mobile apps

Software Development 🇨🇦 Mississauga 2,224 1995
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

Food and Beverage Manufacturing 🇨🇦 Toronto 2,195 2004
97
Shred-itlinktr.ee

Secure shredding and recycling of confidential papers and hard drives, protecting businesses from data fraud across North America and Europe.

Information Services 🇨🇦 Oakville 2,185 1988
98
Altus Groupaltusgroup.com

A leading provider of asset and fund intelligence for commercial real estate, offering advanced analytics, technology, and advisory services globally

Software Development 🇨🇦 Toronto 2,168 n/a
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

Food and Beverage Manufacturing 🇨🇦 Toronto 2,143 1989
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

Motor Vehicle Manufacturing 🇨🇦 Toronto 2,112 1985

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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.

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