# 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). 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. πŸ‡¨πŸ‡¦ Ontario Β· 100 companies Β· Updated Nov 11, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Magna International](https://www.tamtam.ai/c/magna-international) (magna.com)
Developing technologies and systems to make vehicles safer and cleaner, focusing on community, environmental, and human benefits. | Motor Vehicle Manufacturing | πŸ‡¨πŸ‡¦ Aurora | 158,000 | 1957 | | 2 | [TD](https://www.tamtam.ai/c/td-toronto) (careers.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 | πŸ‡¨πŸ‡¦ Toronto | 105,476 | | | 3 | [RBC](https://www.tamtam.ai/c/rbc) (rbc.com)
Global financial institution focused on delivering leading performance through innovative solutions, exceptional client experiences, and community support initiatives in various countries | Banking | πŸ‡¨πŸ‡¦ Toronto | 99,801 | | | 4 | [Scotiabank](https://www.tamtam.ai/c/scotiabank) (scotiabank.com)
A global financial institution serving customers, families, and communities by providing advice, products, and services to help them achieve success | Banking | πŸ‡¨πŸ‡¦ Toronto | 87,065 | | | 5 | [BMO](https://www.tamtam.ai/c/bmo) (bmo.com)
Financial institution offering banking services, career growth opportunities, learning programs, and a supportive culture for personal and professional success. | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 60,290 | | | 6 | [CIBC](https://www.tamtam.ai/c/cibc) (cibc.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 | πŸ‡¨πŸ‡¦ Toronto | 47,865 | | | 7 | [Four Seasons](https://www.tamtam.ai/c/four-seasons-toronto) (fourseasons.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 | πŸ‡¨πŸ‡¦ Toronto | 43,141 | 1961 | | 8 | [Thomson Reuters](https://www.tamtam.ai/c/thomson-reuters) (thomsonreuters.com)
It offers news and information tools for professionals in legal, regulatory, and tax sectors, helping them navigate complex environments. | Software Development | πŸ‡¨πŸ‡¦ Toronto | 36,640 | | | 9 | [Manulife](https://www.tamtam.ai/c/manulife) (manulife.com)
Global financial services group providing insurance, wealth management, and asset management solutions to millions of customers worldwide. | Insurance | πŸ‡¨πŸ‡¦ Toronto | 34,375 | | | 10 | [Colliers](https://www.tamtam.ai/c/colliers) (colliers.com)
Offers real estate services, engineering solutions, and investment management, focusing on client success and delivering strong financial returns. | Real Estate | πŸ‡¨πŸ‡¦ Toronto | 29,561 | | | 11 | [Canadian Tire Corporation](https://www.tamtam.ai/c/canadian-tire-corporation) (canadiantire.ca)
Conglomerate offering retail products across various categories, financial services, and real estate management, also owning a technical outdoor brand. | Retail | πŸ‡¨πŸ‡¦ Toronto | 29,479 | | | 12 | [Department of National Defence/MinistΓ¨re de la dΓ©fense nationale](https://www.tamtam.ai/c/department-of-national-defence-ministere-de-la-defense-nationale) (canada.ca)
A government department in Canada responsible for defending national interests, contributing to international peace and security, and supporting the Canadian Forces | Armed Forces | πŸ‡¨πŸ‡¦ Ottawa | 28,747 | | | 13 | [Shopify](https://www.tamtam.ai/c/shopify) (shopify.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 | πŸ‡¨πŸ‡¦ Ottawa | 28,526 | 2006 | | 14 | [OpenText](https://www.tamtam.ai/c/opentext) (opentext.com)
It specializes in Information Management, assisting businesses of all sizes in securely capturing, governing, and exchanging information globally. | Software Development | πŸ‡¨πŸ‡¦ Waterloo | 22,990 | 1991 | | 15 | [McCain Foods](https://www.tamtam.ai/c/mccain-foods) (mccain.com)
Global leader in prepared potato products, including French Fries and appetizers, focusing on quality, sustainability, and community impact. | Food and Beverage Manufacturing | πŸ‡¨πŸ‡¦ Toronto | 22,000 | 1957 | | 16 | [Intact](https://www.tamtam.ai/c/intact-toronto) (intactfc.com)
Providing insurance solutions to help individuals, businesses, and society thrive during good times and bounce back during challenging times | Insurance | πŸ‡¨πŸ‡¦ Toronto | 21,693 | 1809 | | 17 | [Canadian Armed Forces \| Forces armΓ©es canadiennes](https://www.tamtam.ai/c/canadian-armed-forces-forces-armees-canadiennes) (forces.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 | πŸ‡¨πŸ‡¦ Ottawa | 20,412 | | | 18 | [Celestica](https://www.tamtam.ai/c/celestica) (celestica.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 | πŸ‡¨πŸ‡¦ Toronto | 16,022 | 1994 | | 19 | [Barrick Mining Corporation](https://www.tamtam.ai/c/barrick-mining-corporation) (barrick.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 | πŸ‡¨πŸ‡¦ Toronto | 15,486 | 1983 | | 20 | [TJX Canada – Winners, Marshalls, HomeSense](https://www.tamtam.ai/c/tjx-canada-winners-marshalls-homesense) (jobs.tjx.com)
A dynamic company offering diverse career opportunities in buying, planning, merchandising, marketing, and retailing, with a focus on quality and value | Retail | πŸ‡¨πŸ‡¦ Mississauga | 14,141 | 1982 | | 21 | [Hatch](https://www.tamtam.ai/c/hatch-mississauga) (hatch.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 | πŸ‡¨πŸ‡¦ Mississauga | 11,326 | 1955 | | 22 | [RBC Capital Markets](https://www.tamtam.ai/c/rbc-capital-markets) (rbccm.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 | πŸ‡¨πŸ‡¦ Toronto | 11,098 | | | 23 | [KPMG Canada](https://www.tamtam.ai/c/kpmg-canada) (kpmg.com)
Providing audit, tax, and advisory services to public, private, nonprofit, and public sector organizations across Canada with professionalism. | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 10,017 | | | 24 | [Ontario Power Generation](https://www.tamtam.ai/c/ontario-power-generation) (opg.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 | πŸ‡¨πŸ‡¦ Toronto | 9,878 | 1999 | | 25 | [Restaurant Brands International](https://www.tamtam.ai/c/restaurant-brands-international) (rbi.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 | πŸ‡¨πŸ‡¦ Toronto | 9,244 | 2014 | | 26 | [RBC Wealth Management](https://www.tamtam.ai/c/rbc-wealth-management) (rbcwealthmanagement.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 | πŸ‡¨πŸ‡¦ Toronto | 8,748 | 1869 | | 27 | [GFL Environmental Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Vaughan | 8,244 | | | 28 | [University of Guelph](https://www.tamtam.ai/c/university-of-guelph) (uoguelph.ca)
Dedicated to improving quality of life through innovative research and education in essential areas like water, food, health, and environment | Higher Education | πŸ‡¨πŸ‡¦ Guelph | 7,725 | 1964 | | 29 | [Global Affairs Canada \| Affaires mondiales Canada](https://www.tamtam.ai/c/global-affairs-canada-affaires-mondiales-canada) (international.gc.ca)
Manage diplomatic and consular relations, promote international trade, lead international development and humanitarian assistance efforts for Canada. | Government Administration | πŸ‡¨πŸ‡¦ Ottawa | 7,379 | 1909 | | 30 | [Tim Hortons](https://www.tamtam.ai/c/tim-hortons) (timhortons.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 | πŸ‡¨πŸ‡¦ Toronto | 6,960 | 1964 | | 31 | [Linamar Corporation](https://www.tamtam.ai/c/linamar-corporation) (linktr.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 | πŸ‡¨πŸ‡¦ Guelph | 6,668 | 1966 | | 32 | [Apotex Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Toronto | 6,548 | | | 33 | [TD Securities](https://www.tamtam.ai/c/td-securities) (tdsecurities.com)
A leading global provider of integrated capital markets products and services, offering underwriting, advisory, market access, transaction banking, and investment solutions | Investment Banking | πŸ‡¨πŸ‡¦ Toronto | 6,544 | | | 34 | [BGIS](https://www.tamtam.ai/c/bgis) (bgis.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 | πŸ‡¨πŸ‡¦ Markham | 6,379 | 1992 | | 35 | [Aecon Group Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Toronto | 6,368 | | | 36 | [Maple Leaf Foods Inc](https://www.tamtam.ai/c/maple-leaf-foods-inc) (mapleleaffoods.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 | πŸ‡¨πŸ‡¦ Mississauga | 6,114 | | | 37 | [Manulife Wealth & Asset Management](https://www.tamtam.ai/c/manulife-wealth-and-asset-management) (manulifeim.com)
Global investment management, financial advice, and retirement planning services with tailored solutions and responsible investing across public and private markets. | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 5,984 | | | 38 | [Martinrea International](https://www.tamtam.ai/c/martinrea-international) (martinrea.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 | πŸ‡¨πŸ‡¦ Vaughan | 5,692 | 2001 | | 39 | [PwC Canada](https://www.tamtam.ai/c/pwc-canada) (pwc.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 | πŸ‡¨πŸ‡¦ Toronto | 5,523 | | | 40 | [BMO Capital Markets](https://www.tamtam.ai/c/bmo-capital-markets) (capitalmarkets.bmo.com)
A leading North American financial services provider offering a complete range of investment and corporate banking products to clients worldwide | Investment Banking | πŸ‡¨πŸ‡¦ Toronto | 5,451 | | | 41 | [ATS Corporation](https://www.tamtam.ai/c/ats-corporation) (atsautomation.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 | πŸ‡¨πŸ‡¦ Cambridge | 5,287 | 1978 | | 42 | [Agnico Eagle Mines Limited](https://www.tamtam.ai/c/agnico-eagle-mines-limited) (agnicoeagle.com)
A senior Canadian gold mining company with mines in Canada, Finland, Mexico, and Australia, focused on producing and exploring precious metals | Mining | πŸ‡¨πŸ‡¦ Toronto | 5,223 | 1957 | | 43 | [Royal Canadian Mounted Police \| Gendarmerie royale du Canada](https://www.tamtam.ai/c/royal-canadian-mounted-police-gendarmerie-royale-du-canada) (rcmp.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 | πŸ‡¨πŸ‡¦ Ottawa | 5,068 | | | 44 | [EXP](https://www.tamtam.ai/c/exp) (exp.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 | πŸ‡¨πŸ‡¦ Brampton | 4,949 | 1906 | | 45 | [BDO Canada](https://www.tamtam.ai/c/bdo-canada) (bdo.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 | πŸ‡¨πŸ‡¦ Toronto | 4,858 | 1921 | | 46 | [MDA Space](https://www.tamtam.ai/c/mda-space) (mda.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 | πŸ‡¨πŸ‡¦ Brampton | 4,478 | 1969 | | 47 | [Canadian Red Cross](https://www.tamtam.ai/c/canadian-red-cross) (redcross.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 | πŸ‡¨πŸ‡¦ Ottawa | 4,268 | | | 48 | [Recipe Unlimited Corporation](https://www.tamtam.ai/c/recipe-unlimited-corporation) (recipeunlimited.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 | πŸ‡¨πŸ‡¦ Vaughan | 4,240 | | | 49 | [CIBC Capital Markets](https://www.tamtam.ai/c/cibc-capital-markets) (cibccm.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 | πŸ‡¨πŸ‡¦ Toronto | 4,231 | | | 50 | [Costco Wholesale Canada](https://www.tamtam.ai/c/costco-wholesale-canada) (costco.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 | πŸ‡¨πŸ‡¦ Ottawa | 4,127 | 1983 | | 51 | [Wilfrid Laurier University](https://www.tamtam.ai/c/wilfrid-laurier-university) (wlu.ca)
Canadian university focusing on teaching, research, and student satisfaction with programs in arts, business, science, social work, and education. | Higher Education | πŸ‡¨πŸ‡¦ Waterloo | 4,060 | | | 52 | [ABC Technologies](https://www.tamtam.ai/c/abc-technologies) (abctechnologies.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 | πŸ‡¨πŸ‡¦ Toronto | 4,059 | 1974 | | 53 | [D+H](https://www.tamtam.ai/c/d-h) (finastra.com)
Merger of D+H and Misys creating Finastra, a leading global fintech company providing innovative financial technology solutions. | IT Services and IT Consulting | πŸ‡¨πŸ‡¦ Toronto | 4,037 | | | 54 | [Mitel](https://www.tamtam.ai/c/mitel) (mitel.com)
It powers over 2 billion daily connections, assisting businesses in connecting, collaborating, and providing customer care effectively. | Telecommunications | πŸ‡¨πŸ‡¦ Kanata | 3,941 | 1972 | | 55 | [Perseus Group, Constellation Software](https://www.tamtam.ai/c/perseus-group-constellation-software) (csiperseus.com)
The company focuses on nurturing and growing businesses through data-driven guidance, permanent capital, and empowering general managers for maximum potential | Software Development | πŸ‡¨πŸ‡¦ Markham | 3,916 | 2004 | | 56 | [Revera Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Toronto | 3,631 | 1961 | | 57 | [CSA Testing & Certification](https://www.tamtam.ai/c/csa-testing-and-certification) (csagroup.org)
Development of safety and technical standards combined with global testing, inspection, and certification services for diverse industries. | Public Safety | πŸ‡¨πŸ‡¦ Toronto | 3,522 | 1919 | | 58 | [Avison Young](https://www.tamtam.ai/c/avison-young) (avisonyoung.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 | πŸ‡¨πŸ‡¦ Toronto | 3,517 | | | 59 | [Bill Gosling Outsourcing](https://www.tamtam.ai/c/bill-gosling-outsourcing) (billgosling.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 | πŸ‡¨πŸ‡¦ Barrie | 3,435 | 1955 | | 60 | [Experior Financial Group](https://www.tamtam.ai/c/experior-financial-group) (experiorfinancial.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 | πŸ‡¨πŸ‡¦ Guelph | 3,416 | 2014 | | 61 | [Liberty](https://www.tamtam.ai/c/liberty) (jobs.libertyenergyandwater.com)
Provider of essential energy and water services, including clean, renewable power generation, with a focus on sustainability and customer satisfaction | Utilities | πŸ‡¨πŸ‡¦ Oakville | 3,364 | 1988 | | 62 | [Geotab](https://www.tamtam.ai/c/geotab) (geotab.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 | πŸ‡¨πŸ‡¦ Oakville | 3,167 | 2000 | | 63 | [Spin Master](https://www.tamtam.ai/c/spin-master) (spinmaster.com)
Global children's entertainment company creating toys, digital games, and original content including popular brands and preschool franchises. | Manufacturing | πŸ‡¨πŸ‡¦ Toronto | 3,140 | | | 64 | [1Password](https://www.tamtam.ai/c/1password) (1password.com)
Protects business data, employee accounts, and sensitive information with secure access, sharing, and integration into existing systems. | Computer and Network Security | πŸ‡¨πŸ‡¦ Toronto | 3,074 | 2005 | | 65 | [Black & McDonald Limited](https://www.tamtam.ai/c/black-and-mcdonald-limited) (blackandmcdonald.com)
Integrated multi-trade service provider delivering high-quality construction, facilities management, and technical solutions across North America with operational excellence. | Construction | πŸ‡¨πŸ‡¦ Toronto | 3,066 | 1921 | | 66 | [CI Financial](https://www.tamtam.ai/c/ci-financial) (cifinancial.com)
An independent company providing global asset management and wealth advisory services with a focus on high-quality investments and innovative strategies | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 3,051 | | | 67 | [Samuel, Son & Co.](https://www.tamtam.ai/c/samuel-son-and-co) (samuel.com)
Family-owned integrated network providing metal manufacturing, processing, distribution, and value-added industrial products and services across North America. | Manufacturing | πŸ‡¨πŸ‡¦ Oakville | 3,036 | 1855 | | 68 | [RBC Insurance](https://www.tamtam.ai/c/rbc-insurance-mississauga) (rbcinsurance.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 | πŸ‡¨πŸ‡¦ Mississauga | 2,965 | | | 69 | [Harris Computer](https://www.tamtam.ai/c/harris-computer) (harriscomputer.com)
Provides mission-critical software solutions for public sector, healthcare, utilities, and private sectors across North America, Europe, Asia, Australia. | Software Development | πŸ‡¨πŸ‡¦ Ottawa | 2,929 | 1976 | | 70 | [REDPATH MINING](https://www.tamtam.ai/c/redpath-mining) (redpathmining.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 | πŸ‡¨πŸ‡¦ North Bay | 2,840 | 1962 | | 71 | [Porter Airlines Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Toronto | 2,769 | 2006 | | 72 | [Livingston International](https://www.tamtam.ai/c/livingston-international) (livingstonintl.com)
Providing customs brokerage, trade consulting, global trade management, freight forwarding, and innovative automation technology solutions worldwide for businesses. | International Trade and Development | πŸ‡¨πŸ‡¦ Toronto | 2,735 | 1945 | | 73 | [H&R REIT](https://www.tamtam.ai/c/h-and-r-reit) (hr-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 | πŸ‡¨πŸ‡¦ Toronto | 2,677 | 1996 | | 74 | [Yamana Gold Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Toronto | 2,628 | 2003 | | 75 | [Multimatic](https://www.tamtam.ai/c/multimatic) (multimatic.com)
A global enterprise specializing in supplying automotive components, systems, and engineering services with manufacturing divisions and engineering facilities worldwide | Motor Vehicle Manufacturing | πŸ‡¨πŸ‡¦ Markham | 2,598 | 1984 | | 76 | [TMX Group](https://www.tamtam.ai/c/tmx-group) (tmx.com)
Operate global capital and commodity markets, providing technology-driven solutions for businesses, investors, and traders to raise capital and prosper. | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 2,564 | | | 77 | [Compass Group Canada](https://www.tamtam.ai/c/compass-group-canada) (compass-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 | πŸ‡¨πŸ‡¦ Mississauga | 2,537 | | | 78 | [Element Fleet Management](https://www.tamtam.ai/c/element-fleet-management) (elementfleet.com)
Providing tailored fleet management solutions and expert support to reduce costs and simplify business operations across entire fleet lifecycles. | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 2,504 | 1946 | | 79 | [Canada Goose](https://www.tamtam.ai/c/canada-goose) (canadagoose.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 | πŸ‡¨πŸ‡¦ Toronto | 2,503 | 1957 | | 80 | [Scotiabank - Global Banking and Markets](https://www.tamtam.ai/c/scotiabank-global-banking-and-markets) (gbm.scotiabank.com)
A global wholesale bank providing expertise, experience, and dedication to meet business needs while adhering to social media disclaimer | Banking | πŸ‡¨πŸ‡¦ Toronto | 2,464 | | | 81 | [Fasken](https://www.tamtam.ai/c/fasken) (fasken.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 | πŸ‡¨πŸ‡¦ Toronto | 2,458 | | | 82 | [CPP Investments \| Investissements RPC](https://www.tamtam.ai/c/cpp-investments-investissements-rpc) (cppinvestments.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 | πŸ‡¨πŸ‡¦ Toronto | 2,417 | 1997 | | 83 | [ContactPoint 360](https://www.tamtam.ai/c/contactpoint-360) (contactpoint360.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 | πŸ‡¨πŸ‡¦ Toronto | 2,361 | 2007 | | 84 | [IAMGOLD Corporation](https://www.tamtam.ai/c/iamgold-corporation) (iamgold.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 | πŸ‡¨πŸ‡¦ Toronto | 2,349 | 1991 | | 85 | [Shawcor](https://www.tamtam.ai/c/shawcor) (tenaris.com)
A provider of solutions in the energy industry, recently acquired by Tenaris Visit Tenaris's LinkedIn page for more information | Manufacturing | πŸ‡¨πŸ‡¦ Toronto | 2,342 | | | 86 | [Roots](https://www.tamtam.ai/c/roots) (roots.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 | πŸ‡¨πŸ‡¦ Toronto | 2,325 | 1973 | | 87 | [Kinaxis](https://www.tamtam.ai/c/kinaxis) (kinaxis.com)
Empowering businesses to orchestrate their entire supply chain network, from long-term planning to real-time execution and delivery. | Software Development | πŸ‡¨πŸ‡¦ Ottawa | 2,322 | | | 88 | [PointClickCare](https://www.tamtam.ai/c/pointclickcare) (pointclickcare.com)
Leading healthcare technology platform providing collaboration and real-time insights throughout the patient healthcare journey for various healthcare providers and organizations | Software Development | πŸ‡¨πŸ‡¦ Toronto | 2,311 | 2000 | | 89 | [Woodbridge](https://www.tamtam.ai/c/woodbridge) (woodbridgegroup.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 | πŸ‡¨πŸ‡¦ Mississauga | 2,262 | 1978 | | 90 | [Tutor Doctor](https://www.tamtam.ai/c/tutor-doctor) (tutordoctor.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 | πŸ‡¨πŸ‡¦ Toronto | 2,243 | 2000 | | 91 | [Canadian Solar Inc.](https://www.tamtam.ai/c/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 | πŸ‡¨πŸ‡¦ Kitchener | 2,240 | 2001 | | 92 | [Lallemand](https://www.tamtam.ai/c/lallemand) (lallemandplantcare.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 | πŸ‡¨πŸ‡¦ Rexdale | 2,232 | | | 93 | [RBC Investor Services](https://www.tamtam.ai/c/rbc-investor-services) (rbcis.com)
Provides investment servicing solutions to asset managers, owners, insurers, and financial institutions, focusing on asset protection and growth worldwide. | Financial Services | πŸ‡¨πŸ‡¦ Toronto | 2,230 | 2006 | | 94 | [Flynn Group of Companies](https://www.tamtam.ai/c/flynn-group-of-companies) (flynncompanies.com)
Leading North American building envelope contractor offering roofing, glazing, metals, waterproofing services Seeking to merge with like-minded companies for growth opportunities | Construction | πŸ‡¨πŸ‡¦ Mississauga | 2,229 | 1978 | | 95 | [SOTI](https://www.tamtam.ai/c/soti) (soti.net)
Global provider of enterprise software solutions for mobile operations, offering a comprehensive platform for managing various devices and building mobile apps | Software Development | πŸ‡¨πŸ‡¦ Mississauga | 2,224 | 1995 | | 96 | [FGF Brands](https://www.tamtam.ai/c/fgf-brands) (fgfbrands.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 | πŸ‡¨πŸ‡¦ Toronto | 2,195 | 2004 | | 97 | [Shred-it](https://www.tamtam.ai/c/shred-it) (linktr.ee)
Secure shredding and recycling of confidential papers and hard drives, protecting businesses from data fraud across North America and Europe. | Information Services | πŸ‡¨πŸ‡¦ Oakville | 2,185 | 1988 | | 98 | [Altus Group](https://www.tamtam.ai/c/altus-group) (altusgroup.com)
A leading provider of asset and fund intelligence for commercial real estate, offering advanced analytics, technology, and advisory services globally | Software Development | πŸ‡¨πŸ‡¦ Toronto | 2,168 | | | 99 | [Give and Go Prepared Foods](https://www.tamtam.ai/c/give-and-go-prepared-foods) (giveandgo.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 | πŸ‡¨πŸ‡¦ Toronto | 2,143 | 1989 | | 100 | [Dilawri Group of Companies](https://www.tamtam.ai/c/dilawri-group-of-companies) (dilawri.ca)
A leading automotive group with 80 dealerships in Canada and the United States, representing 37 popular automotive brands since 1985 | Motor Vehicle Manufacturing | πŸ‡¨πŸ‡¦ Toronto | 2,112 | 1985 | ## 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](https://www.tamtam.ai/l/largest-companies-ontario) (5,032) - [Financial services firms in Ontario](https://www.tamtam.ai/l/financial-services-firms-ontario) (396) - [Manufacturers in Ontario](https://www.tamtam.ai/l/manufacturers-ontario) (389) - [Critical infrastructure operators in Ontario](https://www.tamtam.ai/l/critical-infrastructure-operators-ontario) (344) - [Retail chains in Ontario](https://www.tamtam.ai/l/retail-chains-ontario) (327) - [Companies with in-house R&D in Ontario](https://www.tamtam.ai/l/r-and-d-companies-ontario) (300) - [Logistics companies in Ontario](https://www.tamtam.ai/l/logistics-companies-ontario) (285) - [Education providers in Ontario](https://www.tamtam.ai/l/education-companies-ontario) (276) - [SaaS companies in Ontario](https://www.tamtam.ai/l/saas-companies-ontario) (275) - [Truck Transportation companies in Ontario](https://www.tamtam.ai/l/truck-transportation-companies-ontario) (270) - [Transportation, Logistics, Supply Chain and Storage companies in Ontario](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-ontario) (261) - [Public sector organisations in Ontario](https://www.tamtam.ai/l/public-sector-organisations-ontario) (259) - [Financial Services companies in Ontario](https://www.tamtam.ai/l/financial-services-companies-ontario) (250) - [IT Services and IT Consulting companies in Ontario](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ontario) (235) - [Software Development companies in Ontario](https://www.tamtam.ai/l/software-development-companies-ontario) (231) - [Healthcare providers in Ontario](https://www.tamtam.ai/l/healthcare-providers-ontario) (226) - [Hardware manufacturers in Ontario](https://www.tamtam.ai/l/hardware-companies-ontario) (213) - [Professional services firms in Ontario](https://www.tamtam.ai/l/professional-services-firms-ontario) (211) - [Hospitals and Health Care companies in Ontario](https://www.tamtam.ai/l/hospitals-and-health-care-companies-ontario) (205) - [Distributors and wholesalers in Ontario](https://www.tamtam.ai/l/distributors-and-wholesalers-ontario) (183) - [Companies with a mobile app in Ontario](https://www.tamtam.ai/l/companies-with-mobile-app-ontario) (181) - [Publicly traded companies in Ontario](https://www.tamtam.ai/l/publicly-traded-companies-ontario) (156) - [IT services companies in Ontario](https://www.tamtam.ai/l/it-services-companies-ontario) (156) - [Subscription businesses in Ontario](https://www.tamtam.ai/l/subscription-businesses-ontario) (153) ## The same list elsewhere in Canada - [Multinational companies in Canada](https://www.tamtam.ai/l/multinational-companies-canada) (1,934) - [Multinational companies in the province of Quebec](https://www.tamtam.ai/l/multinational-companies-province-of-quebec) (386) - [Multinational companies in British Columbia](https://www.tamtam.ai/l/multinational-companies-british-columbia) (260) - [Multinational companies in Alberta](https://www.tamtam.ai/l/multinational-companies-alberta) (240) - [Multinational companies in Manitoba](https://www.tamtam.ai/l/multinational-companies-manitoba) (42) - [Multinational companies in Toronto](https://www.tamtam.ai/l/multinational-companies-toronto) (377) - [Multinational companies in Montreal](https://www.tamtam.ai/l/multinational-companies-montreal) (203) - [Multinational companies in Vancouver](https://www.tamtam.ai/l/multinational-companies-vancouver) (138) - [Multinational companies in Calgary](https://www.tamtam.ai/l/multinational-companies-calgary) (130) - [Multinational companies in Mississauga](https://www.tamtam.ai/l/multinational-companies-mississauga) (119) - [Multinational companies in Edmonton](https://www.tamtam.ai/l/multinational-companies-edmonton) (47) - [Multinational companies in Ottawa](https://www.tamtam.ai/l/multinational-companies-ottawa) (42) - [Multinational companies in Markham](https://www.tamtam.ai/l/multinational-companies-markham) (37) - [Multinational companies in Vaughan](https://www.tamtam.ai/l/multinational-companies-vaughan) (32) - [Multinational companies in Winnipeg](https://www.tamtam.ai/l/multinational-companies-winnipeg) (32) - [Multinational companies in Brampton](https://www.tamtam.ai/l/multinational-companies-brampton) (30) - [Multinational companies in Richmond](https://www.tamtam.ai/l/multinational-companies-richmond) (27) --- Source: https://www.tamtam.ai/l/multinational-companies-ontario