| # | Company | Employees |
|---|---|---|
| 1 |
Shoppers Drug Martshoppersdrugmart.ca
National chain of pharmacies across Canada, emphasizing professional expertise and personalized service in meeting customers' health care needs for over 50 years |
33,036 |
| 2 |
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. |
24,123 |
| 3 |
University Health Networkuhn.ca
Largest Canadian research hospital network specializing in patient care, medical research, education, and fundraising for advanced healthcare services. |
11,930 |
| 4 |
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 |
9,194 |
| 5 |
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 |
8,686 |
| 6 |
The Hospital for Sick Childrensickkids.ca
Leading pediatric hospital integrating patient care, research, and education to advance children's health and develop innovative treatments globally. |
8,636 |
| 7 |
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 |
7,679 |
| 8 |
Sunnybrooksunnybrook.ca
A leading teaching hospital affiliated with the University of Toronto, specializing in patient care, groundbreaking research, and inventing the future of healthcare |
7,599 |
| 9 |
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 |
7,092 |
| 10 |
Hamilton Health Scienceshamiltonhealthsciences.ca
Healthcare organization delivering specialized cardiac, stroke, trauma, cancer, palliative, and pediatric care to southwestern Ontario and beyond. |
6,690 |
| 11 |
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 |
6,009 |
| 12 |
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 |
5,980 |
| 13 |
Bayshore HealthCarebayshore.ca
Providing personalized home and community healthcare services across Canada, supporting clients' independence and quality of life with customized care plans. |
5,911 |
| 14 |
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 |
4,959 |
| 15 |
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 |
4,868 |
| 16 |
Chartwell Retirement Residenceschartwell.com
providing personalized, compassionate living environments for seniors, supporting residents, families, and employees through meaningful community connections |
4,601 |
| 17 |
Rexall Pharmacy Group Ltd.rexall.ca
A trusted pharmacy brand in Canada, providing quality healthcare, products, and services to Canadian families and communities for over 100 years |
4,593 |
| 18 | 4,477 | |
| 19 |
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 |
4,356 |
| 20 |
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 |
4,350 |
| 21 |
Costco Wholesale Canadacostco.ca
Global retailer with warehouse club operations in 8 countries, known for quality, value, and ethical business practices Family-oriented atmosphere for employee success |
4,127 |
| 22 |
Sinai Healthsinaihealth.ca
A leading academic health science centre focused on integrated care, innovative research, and educating future healthcare leaders for comprehensive patient care |
4,083 |
| 23 |
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 |
3,799 |
| 24 |
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 |
3,760 |
| 25 |
Canadian Blood Servicesblood.ca
Canada's national organization responsible for ensuring a secure and sustainable supply of blood and organs for transfusion and transplantation |
3,745 |
| 26 |
CBI Healthcbihealth.ca
Leading provider of rehabilitation and home health services in Canada, with a national team dedicated to improving clients' physical and mental health |
3,638 |
| 27 |
Private Practice in Psychotherapy and Counselinglinkedin.com
Providing psychotherapy services to adults and couples to support their mental and emotional well-being |
3,593 |
| 28 |
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 |
3,524 |
| 29 |
Sienna Senior Livingsiennaliving.ca
Canada's leading senior living provider with a focus on cultivating happiness, offering a range of living options and personalized care services |
3,417 |
| 30 |
Humber River Healthhrh.ca
Leading digital hospital in North America using technology and clinical expertise to improve patient care, reduce errors, and drive community academic healthcare advancements |
3,272 |
| 31 |
Niagara Healthniagarahealth.on.ca
Regional hospital system providing acute care services, research, and innovation to improve healthcare for residents in the Niagara region |
3,213 |
| 32 |
Mackenzie Healthmackenziehealth.ca
Regional healthcare provider in Southwest York Region with two hospitals and community-based services, offering a wide range of healthcare programs and services to the community |
3,197 |
| 33 |
St. Joseph's Healthcare Hamiltonstjoes.ca
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 |
2,983 |
| 34 |
Mount Sinai Hospital (Toronto), Sinai Healthmountsinai.on.ca
Internationally recognized academic health sciences center providing exemplary patient care, nursing excellence, and top employer culture Flagship clinical programs available |
2,951 |
| 35 |
Lifemark Health Grouplifemark.ca
Canadian healthcare company offering rehab services, medical assessments, wellness programs, and career opportunities Committed to quality care, employee development, and community impact |
2,924 |
| 36 |
North York General Hospitalnygh.on.ca
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 |
2,917 |
| 37 | 2,851 | |
| 38 |
Kingston Health Sciences Centrekingstonhsc.ca
Top Canadian hospital, advancing health care through patient care, medical research, and training future healthcare professionals for Southeastern Ontario. |
2,793 |
| 39 |
CHEOcheo.on.ca
A global leader in pediatric health care and research, providing excellence in complex care, education, and community partnership for children and youth |
2,784 |
| 40 |
Durham Region (The Regional Municipality of Durham)durham.ca
Durham Region provides a wide range of services to a group of diverse communities, including paramedics, recycling, water supply, transit, and social programs |
2,624 |
| 41 |
Southlake Healthsouthlake.ca
Delivering healthcare services to northern York Region and southern Simcoe County through advanced programs, exceptional staff, and a commitment to patient safety and quality care |
2,601 |
| 42 |
Scarborough Health Networkshn.ca
A leading healthcare organization in Scarborough, offering diverse programs and services, including nephrology, cardiac care, spine center, and medical training partnerships with universities |
2,536 |
| 43 |
Halton Healthcarelinktr.ee
A healthcare organization with three community hospitals providing services to nearly 400,000 residents in Halton Hills, Milton, and Oakville, focused on exemplary patient experiences |
2,461 |
| 44 |
Michael Garron Hospitaltehn.ca
A vibrant community hospital in East Toronto providing high-quality, patient-centred healthcare services along the continuum of care with strong partnerships |
2,219 |
| 45 |
Royal Victoria Regional Health Centrervh.on.ca
Healthcare institution in Barrie, Ontario serving over 450,000 residents with specialized services like interventional radiology, stroke care, trauma, cancer, heart, child, and youth programs |
2,191 |
| 46 |
Region of Waterlooregionofwaterloo.ca
Provides municipal services including transit, waste management, health, housing, and employs over 3,500 people in diverse roles. |
2,165 |
| 47 |
Grand River Hospitalwrhn.ca
Ontario's large community hospital in Kitchener - Waterloo, offering a wide range of medical programs and services with over 6000 team members |
2,058 |
| 48 |
Oak Valley Healthoakvalleyhealth.ca
A leading Ontario community health care organization with two hospitals and a Reactivation Care Centre, providing high-quality, patient-centered care Funded by community donations |
1,969 |
| 49 |
Dynacaredynacare.ca
Leading provider of health and wellness solutions in Canada through accurate diagnostic information, innovative technology, and specialized health services for individuals, insurance industry, workplaces, and diagnostics |
1,954 |
| 50 |
VON Canadavon.ca
A nonprofit organization providing innovative clinical, personal, and social support services for people to live comfortably in their own homes |
1,879 |
| 51 |
Health Sciences North/Horizon Santé-Nordhsnsudbury.ca
An integrated network providing high-quality patient care, research, teaching, and services in various medical specialties to communities in Northern Ontario |
1,755 |
| 52 |
Amica Senior Lifestylesamica.ca
Premium senior living provider in Canada offering personalized care, independent living, assisted living, and memory care options with luxury amenities and expert support |
1,752 |
| 53 |
Innomar Strategiesinnomar-strategies.com
provides comprehensive patient support services for specialty pharmaceuticals including consulting, nursing, pharmacy, logistics, and patient assistance programs |
1,724 |
| 54 |
St. Joseph's Health Care Londonsjhc.london.on.ca
A leading academic health care organization in Canada providing compassionate care, teaching, and research to help people live life fully |
1,707 |
| 55 |
Schlegel Villagesschlegelvillages.com
Schlegel Villages manages long term care and retirement communities in Ontario, focusing on building strong communities and providing quality of life for older adults |
1,673 |
| 56 |
GreenShieldgreenshield.ca
National nonprofit health and benefits company combining insurance and health services to improve outcomes and support underserved Canadian communities. |
1,666 |
| 57 |
Thunder Bay Regional Health Sciences Centretbrhsc.net
An academic health sciences centre providing comprehensive care, medical research, and training for healthcare providers in a region the size of France |
1,655 |
| 58 |
VHA Home HealthCarevha.ca
A not-for-profit organization providing high quality care with over 3,000 diverse professionals to vulnerable populations in various community settings |
1,567 |
| 59 |
Dentalcorpdentalcorp.ca
Supporting dental practices across North America by providing seamless, efficient solutions to enhance patient care and operational excellence. |
1,543 |
| 60 |
City of Greater Sudburygreatersudbury.ca
Dynamic team in Northeastern Ontario's regional capital focused on enhancing citizens' quality of life through services in technology, tourism, education, government, and health |
1,443 |
| 61 |
Peterborough Regional Health Centreprhc.on.ca
A regional hospital providing acute healthcare to over 300,000 people with specialized programs in renal, stroke, cardiac, cancer care, and mental health services |
1,440 |
| 62 |
Scarborough and Rouge Hospitalsrhhospital.ca
Healthcare organization with multiple hospital sites and regional programs offering a wide range of medical services, recognized for excellence in various specialties |
1,408 |
| 63 |
Baycrestbaycrest.org
Global leader in aging and brain health innovations, offering comprehensive care for aging patients, conducting top research in cognitive neuroscience, and promoting global knowledge exchange |
1,407 |
| 64 |
CarePartnerscarepartners.ca
Providing compassionate home and community health care services with innovative programs addressing evolving needs of patients and caregivers. |
1,367 |
| 65 |
Queensway Carleton Hospitalqch.on.ca
A patient and family-centered hospital in Ottawa providing acute care services with a focus on emergency, childbirth, geriatrics, mental health, and rehabilitation |
1,335 |
| 66 |
Calian Groupcalian.com
Providing diverse technology and healthcare solutions across communications, learning, security, and advanced technologies with a customer-focused approach. |
1,303 |
| 67 |
Bruyère Healthbruyere.org
The company provides a range of health care services including rehabilitation, complex care, family health teams, long-term care, and senior living options Their mission is to enhance quality of life through integrated care |
1,298 |
| 68 |
Public Health Ontariopublichealthontario.ca
A Crown corporation in Ontario dedicated to protecting public health, providing scientific evidence, expert guidance, and promoting health equity |
1,260 |
| 69 |
Quinte Healthquintehealth.ca
Provider of high quality health care services through four hospitals in Prince Edward, Hastings, and Northumberland Counties, offering a wide range of medical care and services |
1,228 |
| 70 |
St. Mary's General Hospitalwrhn.ca
A leading healthcare provider in Kitchener offering compassionate care, innovative healthcare services, and a commitment to excellence for patients and staff |
1,228 |
| 71 |
Markham Stouffville Hospitaloakvalleyhealth.ca
Healthcare organization transitioning to a new LinkedIn page Former page for a specific hospital will be removed Exciting updates ahead |
1,215 |
| 72 |
Princess Margaret Cancer Centreuhnresearch.ca
Leading cancer research center with internationally recognized scientists focusing on various aspects of cancer through cutting-edge research and state-of-the-art tools |
1,211 |
| 73 |
Women's College Hospitalwomenscollegehospital.ca
A pioneering healthcare institution focusing on women's health, innovation, and addressing Canada's healthcare challenges through interdisciplinary teams and equitable work environment |
1,200 |
| 74 |
Joseph Brant Hospital & Foundationjosephbranthospital.ca
A full-service community teaching hospital in Burlington, Ontario, offering compassionate care, exemplary service, and educational opportunities through partnerships with universities |
1,155 |
| 75 |
North Bay Regional Health Centre (NBRHC)nbrhc.on.ca
Healthcare organization providing acute care, specialist services, and mental health care with 389 beds, outpatient services, and outreach programs in northeast Ontario |
1,108 |
| 76 |
Sault Area Hospitalsah.on.ca
State-of-the-art hospital serving a catchment population of 115,000 residents, offering a range of medical services and programs including cancer and renal care |
1,098 |
| 77 |
CareRx Corporationcarerx.ca
Leading provider of specialty pharmacy services to seniors in Canada, serving various healthcare facilities with timely delivery and effective medication management solutions |
1,089 |
| 78 |
University of Ottawa Heart Instituteottawaheart.ca
A leading cardiovascular health center in Canada providing high-tech, personalized care, advancing cardiac medicine through research, and pioneering new treatments globally |
1,087 |
| 79 |
Holland Bloorview Kids Rehabilitation Hospitalhollandbloorview.ca
Pioneering treatments, technologies, and programs for children with disabilities to fully participate in life through a world-class teaching hospital |
1,086 |
| 80 |
St. Joseph's Health Centre, Torontounityhealth.to
A Catholic teaching hospital in West Toronto, affiliated with the University of Toronto, dedicated to advancing community health through partnerships and resident input |
1,070 |
| 81 |
Hôpital Montforthopitalmontfort.com
An academic hospital in Ontario, focused on exceptional patient care and staff well-being, emphasizing collaboration, innovation, and skill development |
1,054 |
| 82 |
Credit Valley Hospitalthp.ca
Leading hospital with outstanding performance, fiscal responsibility, and quality patient care across three main sites offering acute care and specialized programs |
1,036 |
| 83 |
Ontario Shores Centre for Mental Health Sciencesontarioshores.ca
A mental health care provider offering specialized assessments and treatment services in a recovery-oriented environment, alongside research, education, and advocacy initiatives |
1,006 |
| 84 |
The Royaltheroyal.ca
specialized mental health care, advocacy, research, education, and fundraising to support recovery for complex and treatment-resistant mental illness |
962 |
| 85 |
Guelph General Hospitalgghorg.ca
A comprehensive acute care facility offering advanced technology, diagnostic support, specialty programs, and services to residents of Guelph and Wellington County |
946 |
| 86 |
Spectrum Health Care (SHC)spectrumhealthcare.com
Leading provider of home health care services in Ontario, offering nursing, personal support, foot care, and wellness clinics with patient-focused motto "Always With You" |
937 |
| 87 |
Southbridge Care Homessouthbridgecarehomes.com
This company manages long-term care homes, retirement communities, and independent living facilities in Ontario, focusing on creating caring environments for seniors |
914 |
| 88 |
Princess Margaret Cancer Centreuhn.ca
Keep up-to-date on the latest developments and changes at a prominent hospital through news articles and general information |
898 |
| 89 |
Providence Careprovidencecare.ca
Leading provider of specialized care in aging, mental health, and rehabilitation, offering hospital, long-term care, hospice, and community-based services with a focus on independence and quality of life |
898 |
| 90 |
WoodGreen Community Serviceswoodgreen.org
A social service agency in Toronto providing housing, health services, support for diverse populations, financial counseling, employment services, childcare, and settlement services |
877 |
| 91 |
We Care Home Health Serviceswecare.ca
We provide professional and compassionate homecare services, allowing seniors and individuals in need to live comfortably in familiar surroundings across Canada |
866 |
| 92 |
Brant Community Healthcare Systembchsys.org
A leading community health care organization with a regional acute care health center and urgent/ambulatory care facility, staffed by over 2,300 professionals |
841 |
| 93 |
Massage Addictmassageaddict.ca
A Canadian wellness provider offering massage therapy, chiropractic care, acupuncture, and reflexology in modern clinics with preferred membership pricing |
795 |
| 94 |
Municipality of Chatham-Kentchatham-kent.ca
A municipality in Ontario with a population of 100,000+, Chatham-Kent focuses on providing services, preserving heritage, and promoting economic growth in a diverse region |
773 |
| 95 |
The Scarborough Hospitaltsh.to
A diverse, award-winning hospital in Canada offering high-quality, patient-focused care with a range of services and regional programs Partnered with University of Toronto |
766 |
| 96 |
Orillia Soldiers' Memorial Hospitalosmh.on.ca
A healthcare provider in Ontario's lake country offering medical, surgical, critical care, mental health, and orthopaedic services to local and regional communities |
753 |
| 97 |
CBI Home Healthcbihomehealth.ca
Providing a wide range of healthcare services in various settings, including in-home care, to help patients of all ages achieve maximum function and independence |
744 |
| 98 |
Seasons Retirement Communitiesseasonsretirement.com
A Canadian company operating senior retirement communities in Ontario and Alberta, committed to providing residents with superior customer service and supporting team members' growth |
732 |
| 99 |
Waypoint Centre for Mental Health Carewaypointcentre.ca
Specialty mental health hospital in Penetanguishene, offering inpatient and outpatient services, academic partnerships, and the province's only maximum secure forensic mental health programs |
730 |
| 100 | 717 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Oct 24, 2026.
More company lists in Ontario
- The largest companies in Ontario 4,330
- Financial services firms in Ontario 315
- Critical infrastructure operators in Ontario 262
- SaaS companies in Ontario 232
- Financial Services companies in Ontario 228
- Retail chains in Ontario 213
- Truck Transportation companies in Ontario 206
- Transportation, Logistics, Supply Chain and Storage companies in Ontario 196
- Public sector organisations in Ontario 196
- Hospitals and Health Care companies in Ontario 195
- Software Development companies in Ontario 188
- IT Services and IT Consulting companies in Ontario 179
- Manufacturers in Ontario 169
- Education providers in Ontario 148
- Logistics companies in Ontario 133
- Government Administration companies in Ontario 128
- Construction companies in Ontario 127
- Insurance companies in Ontario 123
- Contract manufacturers in Ontario 113
- Retail companies in Ontario 113
- Non-profit Organizations companies in Ontario 106
- Higher Education companies in Ontario 102
- Distributors and wholesalers in Ontario 100
- Real Estate companies in Ontario 98