The companies with mobile apps in Ontario are mostly large groups in banking and financial services, but also in retail, telecommunications, and hospitality. For example, TD, RBC, and Scotiabank are major financial institutions. Four Seasons operates luxury hotels globally, while Shopify provides e-commerce tools. Loblaw Companies is a large Canadian retailer.
A clear pattern is the strong concentration of headquarters in Toronto, with the majority of these large companies based there. Other significant headquarters cities include Ottawa and Brampton. This indicates a centralized corporate presence within Ontario.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 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 |
105,476 | |||
| 2 | 99,801 | ||||
| 3 |
Scotiabankscotiabank.com
A global financial institution serving customers, families, and communities by providing advice, products, and services to help them achieve success |
87,065 | |||
| 4 | 60,290 | ||||
| 5 | 47,865 | ||||
| 6 |
Four Seasonsfourseasons.com
Global operator of over one hundred thirty luxury hotels, resorts, and fifty-five residential properties across forty-seven countries focused on high-end hospitality innovation. |
43,141 | |||
| 7 |
Thomson Reutersthomsonreuters.com
It offers news and information tools for professionals in legal, regulatory, and tax sectors, helping them navigate complex environments. |
36,640 | |||
| 8 |
Shopifyshopify.com
Provides trusted tools to start, grow, market, and manage a retail business of any size, powering millions of businesses across 175 countries. |
28,526 | |||
| 9 |
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 |
28,500 | |||
| 10 |
Loblaw Companies Limitedloblaw.ca
Largest Canadian retailer offering grocery, pharmacy, health, beauty, financial services, apparel, and recognized brands like President鈥檚 Choice and no name. |
24,123 | |||
| 11 |
Canada Post / Postes Canadacanadapost-postescanada.ca
Nationwide postal service with extensive retail network, delivering parcels and mail to over 17 million Canadian addresses. |
23,941 | |||
| 12 |
CBC/Radio-Canadacbc.radio-canada.ca
Canadian public broadcaster promoting Canadian culture through diverse programming in multiple languages, supporting creative work and job opportunities in television production |
14,336 | |||
| 13 |
Canada Lifecanadalife.com
Providing financial protection, retirement and investment solutions, workplace mental health support, and community project investments to enhance Canadians' well-being. |
13,569 | |||
| 14 |
Restaurant Brands Internationalrbi.com
Operating global quick service restaurant brands including Tim Hortons, Burger King, Popeyes, Firehouse Subs, focusing on sustainable food, planet, and people outcomes. |
9,244 | |||
| 15 |
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 |
8,829 | |||
| 16 |
Co-operatorscooperators.ca
Multi-line insurance, wealth management, and financial advisory services focused on community support, sustainability, and client-centered solutions across Canada. |
8,074 | |||
| 17 | 6,848 | ||||
| 18 | 6,765 | ||||
| 19 |
Bell Mediabellmedia.ca
Leading media and entertainment company with diverse assets in premium video, audio, out-of-home advertising, and digital media; committed to keeping Canadians entertained and informed. |
6,682 | |||
| 20 | 5,666 | ||||
| 21 |
GoodLife Fitnessgoodlifefitness.com
The largest fitness provider in Canada and fourth largest globally, with a strong emphasis on member care, personal wellness, and team motivation |
5,525 | |||
| 22 |
Aviva Canadaaviva.ca
Leading provider of home, automobile, lifestyle, and business insurance serving 2.5 million customers across Canada with strong financial backing. |
5,075 | |||
| 23 |
Wattpadcompany.wattpad.com
Innovative social storytelling platform empowering diverse Gen Z writers with a global community engaging in original stories, driving the future of entertainment |
4,872 | |||
| 24 |
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 |
4,647 | |||
| 25 |
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 |
4,633 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
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 | |||
| 27 |
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 | |||
| 28 | 3,487 | ||||
| 29 |
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 | |||
| 30 |
Durham Collegedurhamcollege.ca
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 |
3,210 | |||
| 31 |
Spin Masterspinmaster.com
Global children's entertainment company creating toys, digital games, and original content including popular brands and preschool franchises. |
3,140 | |||
| 32 |
1Password1password.com
Protects business data, employee accounts, and sensitive information with secure access, sharing, and integration into existing systems. |
3,074 | |||
| 33 |
goeasy Ltd.goeasy.com
A Canadian financial services company providing non-prime leasing, lending, and credit access to millions of Canadians while prioritizing employee culture and community initiatives |
3,024 | |||
| 34 |
Corus Entertainmentcorusent.com
Development and delivery of diverse multimedia content including television, radio, digital platforms, and streaming services for global audiences. |
2,864 | |||
| 35 |
Desjardins Insurancedesjardins.com
A financial group offering insurance products through Certas and Desjardins Financial Security, with agents in Ontario, Alberta, and New Brunswick |
2,797 | |||
| 36 |
Niagara Collegeniagaracollege.ca
Leader in applied education and training, established in 1967 in Welland and now expanding across the Niagara region for top student satisfaction |
2,686 | |||
| 37 |
Wealthsimplewealthsimple.com
Simplifying the investing process for all individuals through accessible and straightforward services Visit wsimco/legal for more information |
2,308 | |||
| 38 |
The Beer Storethebeerstore.ca
Leading retailer and distributor of beer in Ontario, employing passionate beer experts committed to safety, community, and environmental stewardship. |
2,298 | |||
| 39 |
Longo'slongos.com
Specializing in providing the best food experience in the Canadian grocery industry, with a focus on trustworthiness, honesty, and community involvement |
2,286 | |||
| 40 |
Meridian Credit Unionmeridiancu.ca
An organization focused on creating an empowering and collaborative workplace, prioritizing employee well-being, community involvement, and long-term member relationships |
2,269 | |||
| 41 |
Pizza Pizza Limitedpizzapizza.ca
Canadian pizza pioneer with over 750 locations, offering quality food, diverse menus, and exciting promotions with a focus on innovation and community involvement |
2,267 | |||
| 42 |
Flynn Group of Companiesflynncompanies.com
Leading North American building envelope contractor offering roofing, glazing, metals, waterproofing services Seeking to merge with like-minded companies for growth opportunities |
2,229 | |||
| 43 |
Great Canadian Entertainmentgreatcanadian.com
A leading Canadian gaming, entertainment, and hospitality company with 25 gaming properties, offering interactive gaming, horse racing, dining, shows, and hotels Committed to social responsibility |
2,079 | |||
| 44 |
Momentum Financial Services Groupmfsg.com
Provides short-term loans, money transfers, prepaid cards, and technology solutions to underserved communities for accessible financial services. |
2,045 | |||
| 45 |
FRESHCO, LTD.freshco.co
Discount grocery chain part of Sobeys, offering quality fresh food at low prices in 92 stores across Ontario Established in 2010 |
1,958 | |||
| 46 |
City of Markhammarkham.ca
Fast-growing city with diverse communities, strong tech industry, numerous corporate headquarters, quality infrastructure, and recognized as a top government employer. |
1,839 | |||
| 47 |
Questrade Financial Groupquestrade.com
A Canadian financial services company offering low-cost digital alternatives, investment opportunities, online wealth management, and a forward-thinking workplace culture |
1,805 | |||
| 48 |
Huawei Canadaconsumer.huawei.com
A global provider of ICT infrastructure and smart devices, committed to connecting the world through innovative research and development in Canada |
1,758 | |||
| 49 |
Tangerinetangerine.ca
A leading digital bank empowering Canadians to make smarter financial decisions with innovative products, fair fees, and award-winning client service |
1,695 | |||
| 50 |
Descartes Systems Groupdescartes.com
Software-as-a-service solutions enhancing productivity, security, and sustainability for logistics businesses through routing, tracking, shipment planning, and customs compliance. |
1,688 | |||
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 Nov 11, 2026.
More company lists in Ontario
- The largest companies in Ontario 5,032
- Multinational companies in Ontario 901
- Financial services firms in Ontario 396
- Manufacturers in Ontario 389
- Critical infrastructure operators in Ontario 344
- Retail chains in Ontario 327
- Companies with in-house R&D in Ontario 300
- Logistics companies in Ontario 285
- Education providers in Ontario 276
- SaaS companies in Ontario 275
- Truck Transportation companies in Ontario 270
- Transportation, Logistics, Supply Chain and Storage companies in Ontario 261
- Public sector organisations in Ontario 259
- Financial Services companies in Ontario 250
- IT Services and IT Consulting companies in Ontario 235
- Software Development companies in Ontario 231
- Healthcare providers in Ontario 226
- Hardware manufacturers in Ontario 213
- Professional services firms in Ontario 211
- Hospitals and Health Care companies in Ontario 205
- Distributors and wholesalers in Ontario 183
- Publicly traded companies in Ontario 156
- IT services companies in Ontario 156
- Subscription businesses in Ontario 153