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100 leading critical infrastructure operators in Canada

Tamtam tracks 569 critical infrastructure operators headquartered in Canada. This list ranks the 100 largest by number of employees on LinkedIn, led by TD, RBC and Scotiabank. Their median headcount is 6,690. Half of them were founded in 1974 or later. The most common headquarters are Toronto (29), Calgary (10) and Montreal (9).

🇨🇦 Canada100 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
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
2
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
3
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
4
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
5
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
6
Alberta Health Servicesalbertahealthservices.ca

providing accessible, sustainable, patient-focused health services to over 4.5 million people across Alberta with dedicated professionals

Hospitals and Health Care 🇨🇦 Edmonton 46,248 2008
7
Desjardinsdesjardins.com

A leading cooperative financial group in Canada, offering a wide range of products and services through online platforms and subsidiaries

Banking 🇨🇦 Lévis 44,145 n/a
8
TELUStelus.com

A purpose-driven team innovating technology solutions to empower customers, communities, and each other to thrive in a digital world

Telecommunications 🇨🇦 Vancouver 38,236 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
Bellletstalk.bell.ca

A leading Canadian communications company offering advanced wireless, internet, TV, media, and business services, as well as supporting social and economic prosperity

Telecommunications 🇨🇦 Montreal 34,053 1880
11
Rogers Communicationsrogers.com

Provider of communication services, supporting everyday connections and ensuring seamless connectivity for work and personal needs, with a focus on customer satisfaction

Telecommunications 🇨🇦 Toronto 28,500 n/a
12
Loblaw Companies Limitedloblaw.ca

Largest Canadian retailer offering grocery, pharmacy, health, beauty, financial services, apparel, and recognized brands like President’s Choice and no name.

Retail 🇨🇦 Brampton 24,123 n/a
13
Air Canadaaircanada.com

Largest Canadian airline offering extensive scheduled passenger flights across North America and internationally, recognized for service excellence and COVID-19 management.

Airlines and Aviation 🇨🇦 Saint Laurent in Montreal 24,053 1937
14
Canada Post / Postes Canadacanadapost-postescanada.ca

Nationwide postal service with extensive retail network, delivering parcels and mail to over 17 million Canadian addresses.

Freight and Package Transportation 🇨🇦 Ottawa 23,941 n/a
15
City of Torontotoronto.ca

Provides diverse public services to residents, businesses, and visitors, encompassing technology, finance, culture, and innovation, employing a large workforce across numerous divisions.

Government Administration 🇨🇦 Toronto 23,495 n/a
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
National Bank of Canadabnc.ca

Financial institution focusing on personal and business financial advice, community empowerment, innovation, and building lasting client relationships.

Banking 🇨🇦 Montreal 19,342 1859
18
Hydro Québechydroquebec.com

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
19
Fraser Health Authorityfraserhealth.ca

Provider of healthcare services in the Fraser Salish region, operating on the traditional lands of Coast Salish and Nlaka’pamux Nations

Hospitals and Health Care 🇨🇦 Surrey 16,049 2001
20
Suncorsuncor.com

Commercial oil sands development, upgrading, offshore oil and gas production, petroleum refining, and product marketing under Petro-Canada brand.

Oil and Gas 🇨🇦 Calgary 14,758 1967
21
Canada Lifecanadalife.com

Providing financial protection, retirement and investment solutions, workplace mental health support, and community project investments to enhance Canadians' well-being.

Insurance 🇨🇦 Toronto 13,569 n/a
22
CNcn.ca

A North American transportation and logistics leader offering integrated shipping solutions, including rail, intermodal, trucking, warehousing, and distribution services

Rail Transportation 🇨🇦 Montreal 12,816 1919
23
Vancouver Coastal Healthvch.ca

A healthcare organization focused on quality patient care, career growth through training, inclusive culture, and supportive team environment Visit social media for more information

Hospitals and Health Care 🇨🇦 Vancouver 12,357 2001
24
University Health Networkuhn.ca

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 n/a
25
Enbridgeenbridge.com

This company is a leading provider of energy infrastructure, delivering reliable and affordable energy sources while investing in modern infrastructure and resilient communities

Oil and Gas 🇨🇦 Calgary 11,855 n/a
26
Provincial Health Services Authorityphsa.ca

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
27
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
28
Nova Scotia Health Authoritynshealth.ca

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
29
City of Calgarycalgary.ca

A public service organization in Calgary with a focus on making life better for residents through collaborative efforts and innovative practices

Government Administration 🇨🇦 Calgary 10,653 1894
30
Interior Health Authorityjobs.interiorhealth.ca

Providing high-quality health care services to communities in Southern Interior British Columbia with a focus on timely, caring, and efficient support.

Hospitals and Health Care 🇨🇦 Kelowna 10,114 2001
31
iA Financial Group (Industrial Alliance)ia.ca

A leading insurance and wealth management group in Canada and the United States, founded in 1892 and listed on the Toronto Stock Exchange

Financial Services 🇨🇦 Quebec City 10,003 n/a
32
Canadian Natural Resources Limited (CNRL)cnrl.com

Global independent crude oil and natural gas producer with diverse operations in North America, North Sea, and Offshore Africa.

Oil and Gas 🇨🇦 Calgary 9,936 1989
33
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
34
Island Healthislandhealth.ca

Leading health authority in British Columbia, providing comprehensive healthcare services to Vancouver Island's residents with a focus on diversity, inclusion, and sustainability

Hospitals and Health Care 🇨🇦 Victoria 9,357 n/a
35
City of Ottawa / Ville d’Ottawajobs-emplois.ottawa.ca

A diverse workforce providing essential programs and services for over one million residents in Ottawa, with a focus on customer service and community well-being

Government Administration 🇨🇦 Ottawa 9,194 1855
36
WestJetwestjet.com

An airline offering scheduled flights to over 100 destinations, vacation packages to 60+ destinations, rewards program, and award-winning customer service

Airlines and Aviation 🇨🇦 Calgary 8,899 1996
37
Toronto Transit Commission (TTC)ttc.ca

A leading transit system in Toronto, providing safe and reliable transportation to over 17 million customers daily through various modes

Urban Transit Services 🇨🇦 Toronto 8,829 1921
38
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
39
Unity Health Torontounityhealth.to

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
40
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
41
TC Energytcenergy.com

The company is focused on assisting the world in transitioning to cleaner energy while meeting global demand through innovative solutions

Oil and Gas 🇨🇦 Calgary 8,243 1951
42
Co-operatorscooperators.ca

Multi-line insurance, wealth management, and financial advisory services focused on community support, sustainability, and client-centered solutions across Canada.

Financial Services 🇨🇦 Guelph 8,074 1945
43
The Ottawa Hospitalottawahospital.on.ca

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
44
Sunnybrooksunnybrook.ca

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
45
City of Edmontonrecruitment.edmonton.ca

A young and ambitious company in Edmonton, focusing on building a resilient and diverse economy while prioritizing environmental sustainability and community safety

Government Administration 🇨🇦 Edmonton 7,218 1795
46
London Health Sciences Centre (LHSC)lhsc.on.ca

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 n/a
47
ATCOatco.com

Global diversified corporation with over 7,100 employees and $24 billion assets, providing essential services across multiple industries worldwide.

Utilities 🇨🇦 Canada 7,064 1947
48
BC Hydrobchydro.com

Generate and deliver electricity to 95% of British Columbia's population, serving over four million people with reliable power.

Utilities 🇨🇦 Vancouver 6,996 n/a
49
Saskatchewan Health Authoritysaskhealthauthority.ca

Leading Saskatchewan's healthcare with over 44,000 employees and physicians, focused on delivering high-quality, timely care statewide for better health outcomes

Hospitals and Health Care 🇨🇦 Saskatoon 6,967 2017
50
Hamilton Health Scienceshamiltonhealthsciences.ca

Healthcare organization delivering specialized cardiac, stroke, trauma, cancer, palliative, and pediatric care to southwestern Ontario and beyond.

Hospitals and Health Care 🇨🇦 Hamilton 6,690 n/a
51
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
52
Metrolinxmetrolinx.com

Provincial agency managing regional transportation through GO Transit, UP Express, and PRESTO while executing the largest transit infrastructure expansion in Ontario history.

Urban Transit Services 🇨🇦 Toronto 6,444 n/a
53
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
54
Cenovus Energycenovus.com

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
55
Purolator Inc.purolator.com

A leading Canadian provider of integrated freight, parcel, and logistics solutions, focusing on sustainable growth, community well-being, and delivering promises for over 50 years

Freight and Package Transportation 🇨🇦 Mississauga 6,230 1960
56
Trillium Health Partnersthp.ca

Leading hospital providing full range of acute care services, specialized programs, and community-based care Committed to delivering high-quality, accessible patient care

Hospitals and Health Care 🇨🇦 Mississauga 6,009 2011
57
ATB Financialatb.com

Providing personal and business banking, wealth management, and capital markets services through digital options, branches, agencies, and entrepreneur centres for Albertan clients.

Banking 🇨🇦 Edmonton 5,999 1938
58
Extendicareextendicare.com

A leading provider of senior care services in Canada, offering skilled nursing care, home health care, retirement living, and management services with a focus on quality, compassion, and excellence

Hospitals and Health Care 🇨🇦 Markham 5,980 1968
59
Bayshore HealthCarebayshore.ca

Providing personalized home and community healthcare services across Canada, supporting clients' independence and quality of life with customized care plans.

Hospitals and Health Care 🇨🇦 Mississauga 5,911 1966
60
Hydro Onehydroone.com

Electricity transmission and distribution across Ontario, ensuring reliable power delivery and supporting infrastructure for homes and businesses.

Utilities 🇨🇦 Toronto 5,671 1999
61
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
62
Benevabeneva.ca

Group uniting mutualist values to provide caring insurance protection, enabling people to focus on what matters most in life.

Insurance 🇨🇦 Quebec City 5,236 2020
63
Aviva Canadaaviva.ca

Leading provider of home, automobile, lifestyle, and business insurance serving 2.5 million customers across Canada with strong financial backing.

Insurance 🇨🇦 Markham 5,075 1835
64
Santé Québec Centre-Sud-de-l’Île-de-Montréal – Universitaireciusss-centresudmtl.gouv.qc.ca

The CIUSSS of Centre-South of Montreal provides healthcare and social services to nearly 300,000 Montreal residents, with a focus on various specialties and research

Hospitals and Health Care 🇨🇦 Montreal 5,068 2015
65
Ministère des Transports et de la Mobilité durable du Québec (MTMD)transports.gouv.qc.ca

The organization focuses on ensuring sustainable transportation for people and goods in Quebec through efficient and safe transport systems

Government Administration 🇨🇦 Quebec City 5,068 1969
66
Santé Québec Laurentidessantelaurentides.gouv.qc.ca

Health and social services organization with over 100 facilities. Multidisciplinary network of experts, research, and teaching in clinical settings.

Hospitals and Health Care 🇨🇦 Saint-Jérôme 4,971 2015
67
Region of Peelpeelregion.ca

A diverse and inclusive organization in Peel Region delivering social services and infrastructure for residents and businesses, fostering a Community for Life

Government Administration 🇨🇦 Brampton 4,959 1974
68
St. Michael's Hospitalunityhealth.to

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
69
Videotronvideotron.com

A leading Canadian telecommunications company offering innovative services in cable TV, internet access, phone, and wireless communication, known for excellence and advanced technology

Telecommunications 🇨🇦 Montréal (Québec) 4,825 1964
70
Canadian Pacificcpkcr.com

Transcontinental railway offering freight transportation, logistics solutions, and supply chain expertise with access to major North American and global markets.

Rail Transportation 🇨🇦 Calgary 4,761 n/a
71
Centre universitaire de santé McGill | McGill University Health Centrecusm.ca

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 n/a
72
Horizon Health Networkhorizonnb.ca

A leading regional health authority in Atlantic Canada, providing a wide range of healthcare services in New Brunswick, Nova Scotia, and Prince Edward Island

Hospitals and Health Care 🇨🇦 Fredericton 4,655 n/a
73
TD Insurancetdinsurance.com

A leading insurance provider in Canada, offering protection for over four million individuals and families through home, auto, life, and health insurance

Insurance 🇨🇦 Toronto 4,647 n/a
74
City Of Hamiltonhamilton.ca

The organization aims to provide high-quality public services for a healthy, safe, and prosperous community while fostering collective ownership and diversity

Government Administration 🇨🇦 Hamilton 4,633 n/a
75
CHUM - Centre hospitalier de l'Université de Montréalchumontreal.qc.ca

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
76
CAMHcamh.ca

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
77
Emeraemera.com

A North American energy leader headquartered in Halifax, Nova Scotia, focusing on clean energy investments, sustainability, and innovation with over 7,000 dedicated team members

Utilities Administration 🇨🇦 Halifax 4,433 n/a
78
Bruce Powerbrucepower.com

Operation of nuclear power plants generating clean, low-cost electricity supplying 30% of Ontario's power with strong community values.

Utilities 🇨🇦 Tiverton 4,414 2001
79
Definitydefinityfinancial.com

Parent company of several established Canadian property and casualty insurance brands focused on improving insurance for customers and communities.

Insurance 🇨🇦 Waterloo 4,398 n/a
80
Imperial Oilimperialoil.ca

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
81
LifeLabs Medical Laboratory Serviceslifelabs.com

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 n/a
82
William Osler Health Systemwilliamoslerhs.ca

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 n/a
83
Cogeco Inc.corpo.cogeco.com

Provides internet, video, and phone services to residential and business customers in Canada and the United States, plus operates radio stations.

Telecommunications 🇨🇦 Montreal 4,305 1957
84
Shaw Communicationsshaw.ca

A Canadian telecommunications company providing internet, wireless, video, and home phone technology to individuals, families, and businesses for optimal connectivity

Telecommunications 🇨🇦 Calgary 4,239 n/a
85
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
86
Sinai Healthsinaihealth.ca

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 n/a
87
CIUSSS de la Capitale-Nationaleciusss-capitalenationale.gouv.qc.ca

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
88
Santé Québec Estrie – CHUSsanteestrie.qc.ca

The CIUSSS de l’Estrie – CHUS is a healthcare organization offering a wide range of health and social services to over 500,000 people in Quebec

Hospitals and Health Care 🇨🇦 Sherbrooke 4,012 n/a
89
Desjardins General Insurance Groupdesjardinsassurancesgenerales.com

A leading P&C insurance group offering a range of products and services to protect customers' assets through quality coverage and innovative technology

Insurance 🇨🇦 Levis 3,859 n/a
90
Providence Health Careprovidencehealthcare.org

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
91
York Region (The Regional Municipality of York)york.ca

The company provides services to 12 million residents, 54,000 businesses, and 650,000 employees in a two-tier government structure

Government Administration 🇨🇦 Newmarket 3,799 n/a
92
Société de transport de Montréalstm.info

The STM plays a vital role in the public transportation sector, providing reliable and sustainable travel options for over 14 million daily commuters in Montreal

Truck Transportation 🇨🇦 Montreal 3,773 1861
93
Health | Santéontario.ca

Focused on protecting and strengthening publicly funded health care in Ontario by providing patient-focused, sustainable, and high-quality care for all residents

Government Administration 🇨🇦 Toronto 3,762 1999
94
Lakeridge Healthlakeridgehealth.on.ca

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
95
Canadian Blood Servicesblood.ca

Canada's national organization responsible for ensuring a secure and sustainable supply of blood and organs for transfusion and transplantation

Non-profit Organizations 🇨🇦 Ottawa 3,745 1998
96
Northern Health - BCnorthernhealth.ca

Northern Health in northern British Columbia provides high-quality healthcare services across a vast and diverse region, offering rewarding careers in various healthcare sectors

Hospitals and Health Care 🇨🇦 Prince George 3,647 n/a
97
CHU de Québecchudequebec.ca

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
98
Ontario Ministry of Transportation/ Ministère des Transports de l’Ontarioontario.ca

Planning and investing in transportation infrastructure, promoting road safety, supporting economic competitiveness, and integrating sustainability in government operations.

Government Administration 🇨🇦 3,538 1916
99
ParaMed Home Health Careparamed.com

Provider of home care and wellness solutions in Canada since 1974, offering fully trained care providers, ongoing training, support programs, and a strong workforce focused on core values

Hospitals and Health Care 🇨🇦 Markham 3,524 1974
100
Irving Oilirvingoil.com

Energy company focused on refining, distributing petroleum products, and providing fuel solutions across various markets and communities.

Oil and Gas 🇨🇦 Saint John 3,473 1924

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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 Oct 24, 2026.

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