# 100 leading companies with in-house R&D in Canada

Tamtam tracks 678 companies with in-house R&D headquartered in Canada. This list ranks the 100 largest by number of employees on LinkedIn, led by Magna International, TELUS and Thomson Reuters. Their median headcount is 4,477. Half of them were founded in 1972 or later. The most common headquarters are Toronto (18), Montreal (12) and Vancouver (8).

These Canadian organizations conduct in-house research and development. The list includes large corporations like Magna International, a motor vehicle parts manufacturer, and TELUS, a telecommunications provider. Other notable entities are Thomson Reuters, offering information tools for professionals, and Bombardier, a designer and manufacturer of business jets. The presence of several universities, such as the University of Toronto and the University of British Columbia, indicates a strong academic contribution to R&D. Shopify, founded in 2006, represents the younger technology firms.

A significant pattern is the geographical distribution of these R&D-intensive organizations. Toronto and Montreal emerge as major hubs, hosting a substantial number of headquarters. Vancouver also features prominently, with companies like TELUS and lululemon, alongside the University of British Columbia. This concentration suggests key areas for technological and academic development across Canada.

🇨🇦 Canada · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Magna International](https://www.tamtam.ai/c/magna-international) (magna.com)<br>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 | [TELUS](https://www.tamtam.ai/c/telus) (telus.com)<br>A purpose-driven team innovating technology solutions to empower customers, communities, and each other to thrive in a digital world | Telecommunications | 🇨🇦 Vancouver | 38,236 |  |
| 3 | [Thomson Reuters](https://www.tamtam.ai/c/thomson-reuters) (thomsonreuters.com)<br>It offers news and information tools for professionals in legal, regulatory, and tax sectors, helping them navigate complex environments. | Software Development | 🇨🇦 Toronto | 36,640 |  |
| 4 | [Bombardier](https://www.tamtam.ai/c/bombardier) (bombardier.com)<br>A global leader in designing, manufacturing, and servicing exceptional business jets with innovative cabin design, performance, and reliability for diverse clientele worldwide | Aviation and Aerospace Component Manufacturing | 🇨🇦 Montréal | 30,000 |  |
| 5 | [University of Toronto](https://www.tamtam.ai/c/university-of-toronto) (defygravitycampaign.utoronto.ca)<br>Leading Canadian university focused on research, innovation, and global education to address pressing societal challenges and prepare students for success | Higher Education | 🇨🇦 Toronto | 28,832 |  |
| 6 | [Shopify](https://www.tamtam.ai/c/shopify) (shopify.com)<br>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 |
| 7 | [lululemon](https://www.tamtam.ai/c/lululemon) (corporate.lululemon.com)<br>A lifestyle inspired athletic apparel company that creates transformational products for yoga, running, training, and other sweaty pursuits | Retail | 🇨🇦 Vancouver | 25,212 | 1998 |
| 8 | [The University of British Columbia](https://www.tamtam.ai/c/the-university-of-british-columbia) (ubc.ca)<br>a global center for research and teaching, consistently ranked among the top 20 public universities worldwide. | Higher Education | 🇨🇦 Vancouver | 25,036 |  |
| 9 | [OpenText](https://www.tamtam.ai/c/opentext) (opentext.com)<br>It specializes in Information Management, assisting businesses of all sizes in securely capturing, governing, and exchanging information globally. | Software Development | 🇨🇦 Waterloo | 22,990 | 1991 |
| 10 | [Hydro Québec](https://www.tamtam.ai/c/hydro-quebec) (hydroquebec.com)<br>Production, transmission, and distribution of electricity primarily from renewable hydroelectric sources, including research and technology development in energy efficiency. | Renewable Energy Power Generation | 🇨🇦 Montreal | 16,160 | 1944 |
| 11 | [Celestica](https://www.tamtam.ai/c/celestica) (celestica.com)<br>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 |
| 12 | [Université de Montréal](https://www.tamtam.ai/c/universite-de-montreal) (umontreal.ca)<br>Leading higher education institution in Quebec with extensive alumni network, affiliated schools, and recognized as a top Canadian employer. | Higher Education | 🇨🇦 Montreal | 12,234 | 1878 |
| 13 | [University of Ottawa](https://www.tamtam.ai/c/university-of-ottawa) (uottawa.ca)<br>The company is the largest bilingual university in the world, offering education in English and French with a focus on research and global advancements | Higher Education | 🇨🇦 Ottawa | 12,220 |  |
| 14 | [CAE](https://www.tamtam.ai/c/cae-montreal) (cae.com)<br>A global technology company digitizing the physical world, providing simulation training and critical operations support solutions for pilots, airlines, defense forces | Aviation and Aerospace Component Manufacturing | 🇨🇦 Montreal | 12,199 | 1947 |
| 15 | [University Health Network](https://www.tamtam.ai/c/university-health-network) (uhn.ca)<br>Largest Canadian research hospital network specializing in patient care, medical research, education, and fundraising for advanced healthcare services. | Hospitals and Health Care | 🇨🇦 Toronto | 11,930 |  |
| 16 | [Provincial Health Services Authority](https://www.tamtam.ai/c/provincial-health-services-authority) (phsa.ca)<br>Coordination and delivery of specialized provincial health services including hospitals, emergency, cancer, transplant, and disease control programs across BC. | Hospitals and Health Care | 🇨🇦 Vancouver | 11,766 | 2001 |
| 17 | [Nova Scotia Health Authority](https://www.tamtam.ai/c/nova-scotia-health-authority) (nshealth.ca)<br>Providing healthcare services across urban and rural areas, partnering with communities to promote health, healing, research, and learning. | Hospitals and Health Care | 🇨🇦 Halifax | 10,981 | 2015 |
| 18 | [Ontario Power Generation](https://www.tamtam.ai/c/ontario-power-generation) (opg.com)<br>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 |
| 19 | [Université Laval](https://www.tamtam.ai/c/universite-laval) (ulaval.ca)<br>This organization is a French-language university that trains individuals, fosters knowledge, promotes change, and contributes to societal advancement through research and development | Higher Education | 🇨🇦 Quebec City | 9,785 | 1852 |
| 20 | [BRP](https://www.tamtam.ai/c/brp) (brp.com)<br>This company designs and manufactures innovative products for snow, water, land, and air travel, with a focus on enhancing the riding experience | Manufacturing | 🇨🇦 Valcourt | 9,204 | 2003 |
| 21 | [Unity Health Toronto](https://www.tamtam.ai/c/unity-health-toronto) (unityhealth.to)<br>A health network in Toronto providing primary, community, specialized, and long-term care services, as well as investing in research and education | Hospitals and Health Care | 🇨🇦 Toronto | 8,686 | 2017 |
| 22 | [The Hospital for Sick Children](https://www.tamtam.ai/c/the-hospital-for-sick-children) (sickkids.ca)<br>Leading pediatric hospital integrating patient care, research, and education to advance children's health and develop innovative treatments globally. | Hospitals and Health Care | 🇨🇦 Toronto | 8,636 | 1875 |
| 23 | [Toronto Metropolitan University](https://www.tamtam.ai/c/toronto-metropolitan-university) (torontomu.ca)<br>Innovative urban university in Toronto, focusing on creativity, entrepreneurship, inclusivity, and global community engagement to serve societal needs | Higher Education | 🇨🇦 Toronto | 8,478 |  |
| 24 | [Aritzia](https://www.tamtam.ai/c/aritzia) (aritzia.com)<br>Design house creating Everyday Luxury with exclusive brands, premium fabrics, meticulous construction, and timeless style while prioritizing people and planet | Retail | 🇨🇦 Vancouver | 8,295 | 1984 |
| 25 | [Simon Fraser University](https://www.tamtam.ai/c/simon-fraser-university) (sfu.ca)<br>A leading university in Canada delivering world-class education, fostering innovation, and connecting research to real-world solutions for global impact | Higher Education | 🇨🇦 Burnaby | 7,773 | 1965 |
| 26 | [University of Guelph](https://www.tamtam.ai/c/university-of-guelph) (uoguelph.ca)<br>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 |
| 27 | [The Ottawa Hospital](https://www.tamtam.ai/c/the-ottawa-hospital) (ottawahospital.on.ca)<br>Innovative teaching and research hospital providing specialized care, developing new treatments, and improving patient care through community engagement and global impact | Hospitals and Health Care | 🇨🇦 Ottawa | 7,679 | 1998 |
| 28 | [Sunnybrook](https://www.tamtam.ai/c/sunnybrook) (sunnybrook.ca)<br>A leading teaching hospital affiliated with the University of Toronto, specializing in patient care, groundbreaking research, and inventing the future of healthcare | Hospitals and Health Care | 🇨🇦 Toronto | 7,599 | 1948 |
| 29 | [London Health Sciences Centre (LHSC)](https://www.tamtam.ai/c/london-health-sciences-centre-lhsc) (lhsc.on.ca)<br>Acute care teaching hospital offering specialized clinical services, leading in discovery and innovation, providing exceptional patient care and training healthcare professionals | Hospitals and Health Care | 🇨🇦 London | 7,092 |  |
| 30 | [Nutrien](https://www.tamtam.ai/c/nutrien) (nutrien.com)<br>A global leader in agricultural nutrients and solutions, providing products, services, and innovative technology to help growers maximize yields sustainably | Agricultural Chemical Manufacturing | 🇨🇦 Saskatoon | 7,043 | 2018 |
| 31 | [Environment and Climate Change Canada](https://www.tamtam.ai/c/environment-and-climate-change-canada) (canada.ca)<br>Inform Canadians on environmental protection, implement clean growth framework, collaborate with partners, conduct research, develop policies, enforce laws. | Government Administration | 🇨🇦 Gatineau | 6,865 | 1971 |
| 32 | [Hamilton Health Sciences](https://www.tamtam.ai/c/hamilton-health-sciences) (hamiltonhealthsciences.ca)<br>Healthcare organization delivering specialized cardiac, stroke, trauma, cancer, palliative, and pediatric care to southwestern Ontario and beyond. | Hospitals and Health Care | 🇨🇦 Hamilton | 6,690 |  |
| 33 | [Linamar Corporation](https://www.tamtam.ai/c/linamar-corporation) (linktr.ee)<br>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 |
| 34 | [UQAM \| Université du Québec à Montréal](https://www.tamtam.ai/c/uqam-universite-du-quebec-a-montreal) (uqam.ca)<br>A public French-language university known for quality programs, social research, and innovation in creative arts, offering training on campus and regional centers | Higher Education | 🇨🇦 Montreal | 6,602 | 1969 |
| 35 | [Apotex Inc.](https://www.tamtam.ai/c/apotex-inc) (apotex.com)<br>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 |  |
| 36 | [University of Victoria](https://www.tamtam.ai/c/university-of-victoria) (uvic.ca)<br>Leading university on Canada's West Coast focused on innovation, engagement, and respect for knowledge to address global challenges. | Higher Education | 🇨🇦 Victoria | 6,493 | 1963 |
| 37 | [Cenovus Energy](https://www.tamtam.ai/c/cenovus-energy) (cenovus.com)<br>An integrated energy company, operations include oil sands, crude oil, natural gas projects, and downstream upgrading, refining, and marketing across North America, Asia Pacific. | Oil and Gas | 🇨🇦 Calgary | 6,363 | 2009 |
| 38 | [ALDO Group](https://www.tamtam.ai/c/aldo-group) (aldogroup.com)<br>A leading fashion retailer specializing in stylish and accessible footwear and accessories, with a strong commitment to social responsibility and sustainability | Retail | 🇨🇦 Montreal | 6,136 | 1972 |
| 39 | [Martinrea International](https://www.tamtam.ai/c/martinrea-international) (martinrea.com)<br>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 |
| 40 | [Fisheries and Oceans Canada / Pêches et Océans Canada](https://www.tamtam.ai/c/fisheries-and-oceans-canada-peches-et-oceans-canada) (dfo-mpo.gc.ca)<br>Manage fisheries and aquaculture sustainably, protect aquatic ecosystems, maintain navigable waterways, and respond to maritime emergencies with Indigenous collaboration. | Government Administration | 🇨🇦 Ottawa | 5,665 |  |
| 41 | [ATS Corporation](https://www.tamtam.ai/c/ats-corporation) (atsautomation.com)<br>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 | [Conestoga College](https://www.tamtam.ai/c/conestoga-college-kitchener) (conestogac.on.ca)<br>career-focused education, training, applied research, technology-enhanced learning, co-op opportunities, and comprehensive student support for diverse learners. | Higher Education | 🇨🇦 Kitchener | 5,198 | 1967 |
| 43 | [Sheridan College](https://www.tamtam.ai/c/sheridan-college) (sheridancollege.ca)<br>Established in 1967, this institution has grown to become a leading Ontario postsecondary institution with four campuses and a diverse range of programs | Higher Education | 🇨🇦 Oakville | 5,079 | 1967 |
| 44 | [Cascades](https://www.tamtam.ai/c/cascades) (cascades.com)<br>Leading sustainable solutions provider for packaging, hygiene, and recovery needs with 75 production units in North America, prioritizing innovation and environmental well-being | Packaging and Containers Manufacturing | 🇨🇦 Kingsey Falls | 5,046 | 1964 |
| 45 | [St. Michael's Hospital](https://www.tamtam.ai/c/st-michael-s-hospital) (unityhealth.to)<br>A leading hospital providing compassionate care, medical education in 27 disciplines, and research through the Keenan Research Centre for global impact | Hospitals and Health Care | 🇨🇦 Toronto | 4,868 | 1892 |
| 46 | [Centre universitaire de santé McGill \| McGill University Health Centre](https://www.tamtam.ai/c/centre-universitaire-de-sante-mcgill-mcgill-university-health-centre) (cusm.ca)<br>An internationally recognized academic health institution providing excellent clinical programs, research, and teaching to advance patient care and knowledge in healthcare | Hospitals and Health Care | 🇨🇦 Montreal | 4,668 |  |
| 47 | [Natural Resources Canada (NRCan)](https://www.tamtam.ai/c/natural-resources-canada-nrcan) (natural-resources.canada.ca)<br>A department of the Government of Canada focused on advancing sustainable resource management, economic growth, and environmental stewardship through innovative policies and programs | Government Administration | 🇨🇦 Ottawa | 4,579 |  |
| 48 | [CHUM - Centre hospitalier de l'Université de Montréal](https://www.tamtam.ai/c/chum-centre-hospitalier-de-l-universite-de-montreal) (chumontreal.qc.ca)<br>Provides general, specialized, and highly specialized care to adult patients, conducts research, offers teaching, and promotes health to 40% of Quebec's population. | Hospitals and Health Care | 🇨🇦 Montreal | 4,507 | 1996 |
| 49 | [MDA Space](https://www.tamtam.ai/c/mda-space) (mda.space)<br>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 |
| 50 | [CAMH](https://www.tamtam.ai/c/camh) (camh.ca)<br>A leading teaching hospital in Canada focused on transforming lives through clinical care, research, education, and advocacy for mental health and addiction issues | Hospitals and Health Care | 🇨🇦 Toronto | 4,477 | 1998 |
| 51 | [Imperial Oil](https://www.tamtam.ai/c/imperial-oil) (imperialoil.ca)<br>A Canadian energy company leading in technology and innovation, specializing in petroleum refining, crude oil production, natural gas, petrochemicals, and fuel marketing | Oil and Gas | 🇨🇦 Calgary | 4,372 | 1880 |
| 52 | [LifeLabs Medical Laboratory Services](https://www.tamtam.ai/c/lifelabs-medical-laboratory-services) (lifelabs.com)<br>A leading Canadian provider of diagnostic information and digital health systems, offering laboratory tests, genetics services, and online patient portals | Hospitals and Health Care | 🇨🇦 Toronto | 4,356 |  |
| 53 | [William Osler Health System](https://www.tamtam.ai/c/william-osler-health-system) (williamoslerhs.ca)<br>Health system with three hospitals serving 13 million residents, providing a wide range of services including inpatient, outpatient, urgent care, and specialty clinics | Hospitals and Health Care | 🇨🇦 Brampton | 4,350 |  |
| 54 | [University of Windsor](https://www.tamtam.ai/c/university-of-windsor) (uwindsor.ca)<br>A student-focused university offering undergraduate and graduate programs, professional schools, and innovative research facilities, promoting diversity and excellence in education | Higher Education | 🇨🇦 Windsor | 4,284 |  |
| 55 | [Sinai Health](https://www.tamtam.ai/c/sinai-health) (sinaihealth.ca)<br>A leading academic health science centre focused on integrated care, innovative research, and educating future healthcare leaders for comprehensive patient care | Hospitals and Health Care | 🇨🇦 Toronto | 4,083 |  |
| 56 | [ABC Technologies](https://www.tamtam.ai/c/abc-technologies) (abctechnologies.com)<br>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 |
| 57 | [CIUSSS de la Capitale-Nationale](https://www.tamtam.ai/c/ciusss-de-la-capitale-nationale) (ciusss-capitalenationale.gouv.qc.ca)<br>A healthcare organization in Capitale-Nationale region with over 16,000 employees serving 736,000 citizens, offering general, specialized, research, and education services in health and social services | Hospitals and Health Care | 🇨🇦 Quebec City | 4,022 | 2015 |
| 58 | [British Columbia Institute of Technology](https://www.tamtam.ai/c/british-columbia-institute-of-technology) (bcit.ca)<br>A leading post-secondary institution in British Columbia offering practical career credentials, degrees, diplomas, and certificates in various fields Engages in applied research to drive the economy | Higher Education | 🇨🇦 Burnaby | 3,851 | 1964 |
| 59 | [Providence Health Care](https://www.tamtam.ai/c/providence-health-care-vancouver) (providencehealthcare.org)<br>Faith-based health care organization in Canada providing compassionate care across 17 sites for heart, lung, HIV/AIDS, mental health, renal, seniors, and urban populations | Hospitals and Health Care | 🇨🇦 Vancouver | 3,828 | 1997 |
| 60 | [Lakeridge Health](https://www.tamtam.ai/c/lakeridge-health) (lakeridgehealth.on.ca)<br>A comprehensive healthcare provider with multiple hospitals, specialty centers, and community services, committed to delivering high-quality care to the region | Hospitals and Health Care | 🇨🇦 Ajax | 3,760 | 1998 |
| 61 | [CHU de Québec](https://www.tamtam.ai/c/chu-de-quebec) (chudequebec.ca)<br>Leading healthcare institution in Quebec, providing general, specialized, and super-specialized care to nearly two million people Strong focus on education, research, and technological advancements in health | Hospitals and Health Care | 🇨🇦 Quebec City | 3,643 | 2012 |
| 62 | [NAIT (Northern Alberta Institute of Technology)](https://www.tamtam.ai/c/nait-northern-alberta-institute-of-technology) (nait.ca)<br>A leader in hands-on education, NAIT prepares graduates for in-demand careers in various industries through industry-driven programs, apprenticeship training, and research | Higher Education | 🇨🇦 Edmonton | 3,601 | 1962 |
| 63 | [Enerflex Ltd.](https://www.tamtam.ai/c/enerflex-ltd) (enerflex.com)<br>Global provider of energy infrastructure and transition solutions, specializing in natural gas, low-carbon, and water treatment solutions for a sustainable future | Oil and Gas | 🇨🇦 Calgary | 3,578 | 1980 |
| 64 | [Lightspeed Commerce](https://www.tamtam.ai/c/lightspeed-commerce) (lightspeedhq.com)<br>cloud-based platform unifies online and physical retail operations, multichannel sales, global payments, financing, and supplier network connections for merchants worldwide | Software Development | 🇨🇦 Montreal | 3,574 | 2005 |
| 65 | [General Dynamics Land Systems](https://www.tamtam.ai/c/general-dynamics-land-systems) (gdls.com)<br>Design development production support enhancement of tracked and wheeled military vehicles including Abrams tank, Stryker, LAV, AJAX armored vehicles. | Defense and Space Manufacturing | 🇨🇦 | 3,536 | 1982 |
| 66 | [CSA Testing & Certification](https://www.tamtam.ai/c/csa-testing-and-certification) (csagroup.org)<br>Development of safety and technical standards combined with global testing, inspection, and certification services for diverse industries. | Public Safety | 🇨🇦 Toronto | 3,522 | 1919 |
| 67 | [Arc'teryx Equipment](https://www.tamtam.ai/c/arc-teryx-equipment) (arcteryx.com)<br>Design and manufacture durable, high-performance outdoor gear focused on minimalist solutions for extreme conditions and diverse global customers. | Retail Apparel and Fashion | 🇨🇦 North Vancouver | 3,475 | 1989 |
| 68 | [CIUSSS du Nord-de-l'île-de-Montréal](https://www.tamtam.ai/c/ciusss-du-nord-de-l-ile-de-montreal) (ciusssnordmtl.ca)<br>A healthcare organization providing services to over 450,000 residents in Montreal and specialized care to 18 million Quebecers, focusing on research, education, and innovation in health | Hospitals and Health Care | 🇨🇦 Montreal | 3,376 | 2015 |
| 69 | [Pomerleau](https://www.tamtam.ai/c/pomerleau) (pomerleau.ca)<br>A leading Canadian construction company specializing in building, infrastructure, and civil engineering projects, integrating innovations and sustainability practices | Construction | 🇨🇦 Montreal | 3,339 | 1966 |
| 70 | [CIUSSS de l'Ouest-de-l'Île-de-Montréal](https://www.tamtam.ai/c/ciusss-de-l-ouest-de-l-ile-de-montreal) (ciusss-ouestmtl.gouv.qc.ca)<br>The Montréal West Island IUHSSC provides health and social services to a population of 370,000 with over 10,500 employees and a budget of $905M | Hospitals and Health Care | 🇨🇦 Pointe-Claire | 3,337 | 2015 |
| 71 | [C&S ELECTRIC LTD.](https://www.tamtam.ai/c/c-and-s-electric-ltd) (cselectric.co.in)<br>Leading Indian manufacturer, exporter of electrical and electronic equipment, including switchgear, switchboards, busducts, and protection devices, for global power applications. | Appliances, Electrical, and Electronics Manufacturing | 🇨🇦 New Delhi | 3,255 | 1966 |
| 72 | [Durham College](https://www.tamtam.ai/c/durham-college) (durhamcollege.ca)<br>Durham College offers full-time and part-time programs in various disciplines to over 12,000 students, including a new health care technology management degree program | Higher Education | 🇨🇦 Oshawa | 3,210 | 1967 |
| 73 | [Geotab](https://www.tamtam.ai/c/geotab) (geotab.com)<br>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 |
| 74 | [ArcelorMittal Dofasco](https://www.tamtam.ai/c/arcelormittal-dofasco) (dofasco.arcelormittal.com)<br>Leading manufacturer in North America's supply chain, producing sustainable steel products for automotive, energy, packaging, and construction industries, prioritizing employees and community engagement | Mining | 🇨🇦 Hamilton | 3,136 |  |
| 75 | [1Password](https://www.tamtam.ai/c/1password) (1password.com)<br>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 |
| 76 | [Leclerc Foods](https://www.tamtam.ai/c/leclerc-foods) (leclerc.ca)<br>A family-owned agrifood company with over a century of experience, specializing in cookies, snack bars, and crackers known for quality ingredients and customer satisfaction | Food and Beverage Manufacturing | 🇨🇦 St-Augustin-de-Desmaures | 3,062 | 1905 |
| 77 | [Ensign Energy Services](https://www.tamtam.ai/c/ensign-energy-services) (ensignenergy.com)<br>A global leader in oilfield services, specializing in land-based drilling and well servicing with a focus on safety, innovation, and exceptional customer experience | Oil and Gas | 🇨🇦 Calgary | 3,047 | 1987 |
| 78 | [St. Joseph's Healthcare Hamilton](https://www.tamtam.ai/c/st-joseph-s-healthcare-hamilton) (stjoes.ca)<br>A values-based academic health science centre affiliated with McMaster University and Mohawk College, committed to providing integrated, compassionate care and advancing research and education | Hospitals and Health Care | 🇨🇦 Hamilton | 2,983 | 1890 |
| 79 | [Conestoga College](https://www.tamtam.ai/c/conestoga-college) (on.ca)<br>A leader in polytechnic education offering career-focused programs, engineering degrees, and support services while promoting economic prosperity and student success | Higher Education | 🇨🇦 Kitchener | 2,968 |  |
| 80 | [Mount Sinai Hospital (Toronto), Sinai Health](https://www.tamtam.ai/c/mount-sinai-hospital-toronto-sinai-health) (mountsinai.on.ca)<br>Internationally recognized academic health sciences center providing exemplary patient care, nursing excellence, and top employer culture Flagship clinical programs available | Hospitals and Health Care | 🇨🇦 Toronto | 2,951 | 1923 |
| 81 | [Nova Scotia Community College - NSCC](https://www.tamtam.ai/c/nova-scotia-community-college-nscc) (nscc.ca)<br>Transforming Nova Scotia by providing inclusive education, industry-driven training, workforce preparation, customized business solutions, and fostering innovation and entrepreneurship across the province | Higher Education | 🇨🇦 Halifax | 2,918 |  |
| 82 | [North York General Hospital](https://www.tamtam.ai/c/north-york-general-hospital) (nygh.on.ca)<br>A leading community academic hospital in Canada offering a wide range of acute, ambulatory, and long-term care services with a focus on patient- and family-centered care | Hospitals and Health Care | 🇨🇦 North York | 2,917 | 1968 |
| 83 | [SaskPower](https://www.tamtam.ai/c/saskpower) (saskpower.com)<br>A long-standing power provider in Saskatchewan managing a diverse portfolio, including coal, hydro, wind, solar, and natural gas assets, with a total of 5,437 MW generation capacity | Utilities | 🇨🇦 Regina | 2,869 |  |
| 84 | [SE Health](https://www.tamtam.ai/c/se-health) (sehc.com)<br>A not-for-profit social enterprise providing knowledge, care, and support to help clients achieve health and wellbeing goals Serving over 20,000 Canadians daily | Hospitals and Health Care | 🇨🇦 Markham | 2,851 | 1908 |
| 85 | [Kingston Health Sciences Centre](https://www.tamtam.ai/c/kingston-health-sciences-centre) (kingstonhsc.ca)<br>Top Canadian hospital, advancing health care through patient care, medical research, and training future healthcare professionals for Southeastern Ontario. | Hospitals and Health Care | 🇨🇦 Kingston | 2,793 | 1849 |
| 86 | [CHEO](https://www.tamtam.ai/c/cheo) (cheo.on.ca)<br>A global leader in pediatric health care and research, providing excellence in complex care, education, and community partnership for children and youth | Hospitals and Health Care | 🇨🇦 Ottawa | 2,784 | 1974 |
| 87 | [Bausch Health Companies Inc.](https://www.tamtam.ai/c/bausch-health-companies-inc) (bauschhealth.com)<br>Develops, manufactures, markets healthcare products in gastroenterology, neurology, dermatology, dentistry, aesthetics, pharmaceuticals, and eye health worldwide. | Pharmaceutical Manufacturing | 🇨🇦 Laval | 2,740 | 1959 |
| 88 | [EPCOR](https://www.tamtam.ai/c/epcor) (epcor.com)<br>Provider of essential services including clean water, electricity, drainage, and natural gas with a focus on sustainability and employee satisfaction | Utilities | 🇨🇦 Edmonton | 2,738 | 1891 |
| 89 | [Niagara College](https://www.tamtam.ai/c/niagara-college) (niagaracollege.ca)<br>Leader in applied education and training, established in 1967 in Welland and now expanding across the Niagara region for top student satisfaction | Higher Education | 🇨🇦 Welland | 2,686 | 1967 |
| 90 | [Université du Québec à Trois-Rivières](https://www.tamtam.ai/c/universite-du-quebec-a-trois-rivieres) (uqtr.ca)<br>Specialized university offering innovative fields of study and research, such as leisure, small business management, hydrogen research, chiropractic, midwifery, criminalistic chemistry, philosophy, and arts | Higher Education | 🇨🇦 Trois-Rivières | 2,649 | 1969 |
| 91 | [University of Regina](https://www.tamtam.ai/c/university-of-regina) (uregina.ca)<br>Leading university in Saskatchewan offering experience-based learning, innovative programs, and a wide range of bachelor's, master's, and doctoral degrees Alumni contribute locally and globally | Higher Education | 🇨🇦 Regina | 2,618 | 1974 |
| 92 | [Multimatic](https://www.tamtam.ai/c/multimatic) (multimatic.com)<br>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 |
| 93 | [Providence Health Care](https://www.tamtam.ai/c/providence-health-care) (providencehealthcare.org)<br>Faith-based health care organization in Canada providing compassionate care across 17 sites for heart, lung, HIV/AIDS, mental health, renal, seniors, and urban populations | Hospitals and Health Care | 🇨🇦 Vancouver | 2,570 |  |
| 94 | [Ubisoft Montréal](https://www.tamtam.ai/c/ubisoft-montreal) (montreal.ubisoft.com)<br>Creating original and memorable gaming experiences since 1997, fostering creativity and diversity among employees to develop iconic franchises that captivate millions worldwide | Computer Games | 🇨🇦 Montreal | 2,561 | 1997 |
| 95 | [BC Cancer](https://www.tamtam.ai/c/bc-cancer) (bccancer.bc.ca)<br>A provincial cancer control program offering prevention, diagnosis, treatment, research, and supportive care with a vision of a world free from cancer | Hospitals and Health Care | 🇨🇦 Vancouver | 2,549 | 1938 |
| 96 | [CHU Sainte-Justine](https://www.tamtam.ai/c/chu-sainte-justine) (chusj.org)<br>The largest mother-child hospital in Canada, CHU Sainte-Justine employs 5,000 staff and 500 healthcare professionals, prioritizing innovation and patient-centered care | Hospitals and Health Care | 🇨🇦 Montreal | 2,482 |  |
| 97 | [CISSS de la Montérégie-Centre](https://www.tamtam.ai/c/cisss-de-la-monteregie-centre) (nousrecrutons.ca)<br>The integrated health and social services center in Montérégie-Centre offers quality care and services to 420,000 residents through a network of facilities and medical professionals | Hospitals and Health Care | 🇨🇦 Greenfield Park | 2,465 |  |
| 98 | [IWK Health](https://www.tamtam.ai/c/iwk-health) (iwkhealth.ca)<br>Internationally recognized academic health sciences centre in Halifax, Nova Scotia dedicated to patient-centered care, research, and education for women, children, youth, and families | Hospitals and Health Care | 🇨🇦 Halifax Regional Municipality & Waterville | 2,465 |  |
| 99 | [NOVA Chemicals](https://www.tamtam.ai/c/nova-chemicals) (novachem.com)<br>Designing and producing high-quality polyethylene resins, investing in recycling infrastructure, and promoting circular economy through innovation and partnerships. | Chemical Manufacturing | 🇨🇦 Calgary | 2,342 | 1975 |
| 100 | [RRC Polytech](https://www.tamtam.ai/c/rrc-polytech) (rrc.ca)<br>Manitoba's largest institute of applied learning offering over 110 full-time programs in various fields to train future leaders for success | Higher Education | 🇨🇦 Winnipeg | 2,341 | 1938 |

## 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 Canada

- [The largest companies in Canada](https://www.tamtam.ai/l/largest-companies-canada) (11,083)
- [Multinational companies in Canada](https://www.tamtam.ai/l/multinational-companies-canada) (1,934)
- [Manufacturers in Canada](https://www.tamtam.ai/l/manufacturers-canada) (946)
- [Retail chains in Canada](https://www.tamtam.ai/l/retail-chains-canada) (851)
- [Critical infrastructure operators in Canada](https://www.tamtam.ai/l/critical-infrastructure-operators-canada) (767)
- [Public sector organisations in Canada](https://www.tamtam.ai/l/public-sector-organisations-canada) (699)
- [Financial services firms in Canada](https://www.tamtam.ai/l/financial-services-firms-canada) (687)
- [Logistics companies in Canada](https://www.tamtam.ai/l/logistics-companies-canada) (593)
- [Truck Transportation companies in Canada](https://www.tamtam.ai/l/truck-transportation-companies-canada) (581)
- [SaaS companies in Canada](https://www.tamtam.ai/l/saas-companies-canada) (543)
- [Hardware manufacturers in Canada](https://www.tamtam.ai/l/hardware-companies-canada) (502)
- [Energy companies in Canada](https://www.tamtam.ai/l/energy-companies-canada) (497)
- [Software Development companies in Canada](https://www.tamtam.ai/l/software-development-companies-canada) (484)
- [Professional services firms in Canada](https://www.tamtam.ai/l/professional-services-firms-canada) (481)
- [IT Services and IT Consulting companies in Canada](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-canada) (477)
- [Transportation, Logistics, Supply Chain and Storage companies in Canada](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-canada) (464)
- [Distributors and wholesalers in Canada](https://www.tamtam.ai/l/distributors-and-wholesalers-canada) (452)
- [Financial Services companies in Canada](https://www.tamtam.ai/l/financial-services-companies-canada) (432)
- [Healthcare providers in Canada](https://www.tamtam.ai/l/healthcare-providers-canada) (416)
- [Construction companies in Canada](https://www.tamtam.ai/l/construction-companies-canada) (391)
- [Oil and Gas companies in Canada](https://www.tamtam.ai/l/oil-and-gas-companies-canada) (380)
- [Companies with a mobile app in Canada](https://www.tamtam.ai/l/companies-with-mobile-app-canada) (367)
- [Retail companies in Canada](https://www.tamtam.ai/l/retail-companies-canada) (358)
- [Hospitals and Health Care companies in Canada](https://www.tamtam.ai/l/hospitals-and-health-care-companies-canada) (357)

## The same list elsewhere in Canada

- [Companies with in-house R&D in Ontario](https://www.tamtam.ai/l/r-and-d-companies-ontario) (300)
- [Companies with in-house R&D in the province of Quebec](https://www.tamtam.ai/l/r-and-d-companies-province-of-quebec) (159)
- [Companies with in-house R&D in British Columbia](https://www.tamtam.ai/l/r-and-d-companies-british-columbia) (76)
- [Companies with in-house R&D in Alberta](https://www.tamtam.ai/l/r-and-d-companies-alberta) (74)
- [Companies with in-house R&D in Toronto](https://www.tamtam.ai/l/r-and-d-companies-toronto) (93)
- [Companies with in-house R&D in Montreal](https://www.tamtam.ai/l/r-and-d-companies-montreal) (59)
- [Companies with in-house R&D in Calgary](https://www.tamtam.ai/l/r-and-d-companies-calgary) (39)
- [Companies with in-house R&D in Vancouver](https://www.tamtam.ai/l/r-and-d-companies-vancouver) (34)

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Source: https://www.tamtam.ai/l/r-and-d-companies-canada