This selection of large companies in Ontario includes businesses primarily engaged in media, telecommunications, and content creation. Thomson Reuters offers news and information tools for professionals, while Rogers Communications provides communication services. CBC/Radio-Canada and Bell Media are major players in broadcast media and entertainment, and Wattpad is a social storytelling platform. Spin Master focuses on children's entertainment.
A notable pattern is the strong concentration of headquarters in Toronto, indicating a central hub for media and telecommunications operations within the province. This includes companies like Corus Entertainment, Rogers Sports & Media, Postmedia Network Inc., The Globe and Mail, Metroland Media Group, TVO, and STAR MEDIA GROUP.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Thomson Reutersthomsonreuters.com
It offers news and information tools for professionals in legal, regulatory, and tax sectors, helping them navigate complex environments. |
36,640 | |||
| 2 |
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 | |||
| 3 |
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 | |||
| 4 | 6,848 | ||||
| 5 |
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 | |||
| 6 |
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 | |||
| 7 |
Spin Masterspinmaster.com
Global children's entertainment company creating toys, digital games, and original content including popular brands and preschool franchises. |
3,140 | |||
| 8 |
Corus Entertainmentcorusent.com
Development and delivery of diverse multimedia content including television, radio, digital platforms, and streaming services for global audiences. |
2,864 | |||
| 9 |
Rogers Sports & Mediarogerssportsandmedia.com
A dynamic sports and media company in Canada, focusing on innovation, diversity, inclusivity, and community impact through digital-first and data-driven approaches |
1,436 | |||
| 10 |
Postmedia Network Inc.postmedia.com
A Canadian news media company with over 120 brands delivering engaging content across print, online, and mobile platforms to millions weekly |
1,303 | |||
| 11 |
The Globe and Mailtheglobeandmail.com
Provides comprehensive coverage of Canadian national, international, and business news through print and online platforms since 1844. |
1,123 | |||
| 12 |
Metroland Media Groupmetroland.com
A Southern Ontario publisher of daily newspapers and community news websites, committed to community journalism and creating custom marketing plans |
1,058 | |||
| 13 |
Chartered Professional Accountants of Canada (CPA Canada)cpacanada.ca
Support Canadian CPAs through regulation collaboration, professional development, public interest advocacy, and international accounting profession strengthening efforts. |
1,058 | |||
| 14 | 920 | ||||
| 15 |
STAR MEDIA GROUPtorstar.com
Leading media portfolio including newspapers, websites, and innovative tablet apps Embracing digital and mobile media opportunities with a passion for news and content |
835 | |||
| 16 |
CTV Newsctvnews.ca
Leading Canadian news organization with a network of national, international, and local news operations providing trusted news through multiple platforms |
809 | |||
| 17 |
Sun Mediasunmedia.ca
Canada's largest newspaper publisher providing local news and information to over 105 million readers weekly in urban markets and communities |
730 | |||
| 18 |
Harlequinharlequin.com
Global publisher of women's books with over 1,300 authors, offering a wide variety of genres in multiple languages to readers worldwide |
728 | |||
| 19 |
Toronto Starthestar.com
Canada's largest daily newspaper, with over 6 million weekly readers Thestarcom is a highly visited newspaper website in Canada |
721 | |||
| 20 | 718 | ||||
| 21 |
SJCstjoseph.com
Leading Canadian communications organization offering full-production content, advertising technology, print infrastructure, and iconic media brands for clients across North America |
698 | |||
| 22 |
WildBrainwildbrain.com
A global entertainment company creating top content for kids and families, including hit series, TV channels, licensing, and iconic brands like Peanuts and Teletubbies |
692 | |||
| 23 |
Sportsnetsportsnet.ca
Canada's leading sports media brand offers multimedia content including TV channels, radio, website, app, and podcasts covering NHL, MLB, NBA, soccer, tennis, wrestling, and more |
650 | |||
| 24 |
MINING.COMmining.com
Leading digital news site for global mining sector, with over 11 million monthly page views, 200,000+ subscribers, mobile-friendly platform, and award-winning marketing and editorial content |
608 | |||
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. | |||||
| 25 | 554 | ||||
| 26 |
theScorescoremediaandgaming.com
A subsidiary of PENN Entertainment, the company empowers sports fans through personalized digital media, sports betting products, live scores, news, stats, and betting information |
536 | |||
| 27 |
Blue Ant Mediablueantmedia.com
International media company producing and distributing diverse premium content, operating multiple streaming and pay TV channels worldwide from Toronto headquarters. |
536 | |||
| 28 |
Pelmorexpelmorex.com
An international weather content and technology company providing hyper-local weather data, climate information, and alert systems globally |
519 | |||
| 29 |
Entertainment Oneentertainmentone.com
Talent-driven studio specializing in development, acquisition, production, financing, and distribution of scripted, unscripted, and podcast content worldwide. |
492 | |||
| 30 | 443 | ||||
| 31 |
The People People Groupthepeoplepeoplegroup.com
A community of over 4000 HR, Recruitment, and Operations professionals, providing resources and networking opportunities Apply for free today! |
420 | |||
| 32 |
Guru Studiogurustudio.com
A creative-driven entertainment industry leader in animated storytelling, producing award-winning hit shows for kids and families worldwide Passionate about talent and original thinking |
395 | |||
| 33 |
The Canadian Pressthecanadianpress.com
Independent national news agency in Canada offering news in English and French, multimedia content production, partnership with industry leaders, and digital content curation services |
323 | |||
| 34 |
ZOOMERzoomermedia.ca
Global leader in creating content and experiences tailored for the 45-plus demographic across various media platforms and through partnerships with CARP |
311 | |||
| 35 |
Jam Filledjamfilled.com
An animation company founded in 2008, with studios in Ottawa and Toronto, that produces quality projects in a fun environment |
311 | |||
| 36 |
Penguin Random House Canadapenguinrandomhouse.ca
A leading Canadian book publisher with diverse imprints, producing over 500 new titles annually and distributing thousands more, fostering a love for reading worldwide |
302 | |||
| 37 |
Arts & Craftsarts-crafts.ca
A Toronto based artist-owned media specializing in music, offering record label, artist management, and music publishing services worldwide Representing a diverse roster of artists |
255 | |||
| 38 |
Scholastic Canadascholastic.ca
A leading publisher in Canada, providing award-winning books, educational materials, and software to children, parents, and teachers to promote reading and learning |
233 | |||
| 39 |
SiriusXM Canadasiriusxm.ca
A leading audio entertainment company offering ad-free music, sports talk, live events, news, podcasts, and exclusive talk shows on various devices |
217 | |||
| 40 |
The Weather Networktheweathernetwork.com
An international weather content and technology company, providing innovative data solutions and business insights to consumers and businesses globally |
213 | |||
| 41 |
The Conference Board of Canadaconferenceboard.ca
A leading Canadian research organization specializing in economic trends, public policy, and organizational performance, providing objective insights and leadership development services |
212 | |||
| 42 |
Group of Gold Linegroupofgl.com
Specializing in telecommunication solutions, IPTV, web-to-print, and business solutions, the group offers innovative technology products connecting people globally |
206 | |||
| 43 |
University of Toronto Pressutppublishing.com
A leading scholarly publisher in Canada, offering a wide range of scholarly, course, and general-interest books, along with innovative journal and distribution services |
188 | |||
| 44 |
G7 Research Groupg7.utoronto.ca
Global network of scholars and professionals providing independent information, analysis, and research on the G7/8 and related institutions since 1987 |
100 | |||
| 45 |
BNN Bloombergbnnbloomberg.ca
A Canadian television service focused on business news, with market coverage, stock updates, business news, and analysis for Canadian investors |
85 | |||
| 46 |
Channel Zero Inc.chz.com
A Canadian media company offering independent television, film, and digital media through various channels, including over-the-air TV, specialty channels, and digital sales agency services |
57 | |||
| 47 |
WOWtv/Canadian Chinese Media Networkwow1.tv
The company is a Chinese media network in Canada offering news, entertainment, documentaries, and programming through television, IPTV, online streaming, and mobile devices |
23 | |||
| 48 |
AzFarangazfarang.ir
An independent media platform focusing on narrative experiences beyond Iran's borders, presenting diverse perspectives while respecting local laws and providing engaging content |
5 | |||
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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 12, 2026.
More company lists in Ontario
- The largest companies in Ontario 5,032
- Multinational companies in Ontario 901
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- Manufacturers in Ontario 389
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- Logistics companies in Ontario 285
- Education providers in Ontario 276
- SaaS companies in Ontario 275
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- Financial Services companies in Ontario 250
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- Companies with a mobile app in Ontario 181
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