This selection of multinational companies in Montreal highlights a concentration of firms in professional services, engineering, and higher education. Notable examples include WSP, providing engineering and advisory services across fifty countries, and AtkinsRéalis, a global professional services organization focused on sustainable infrastructure solutions. McGill University is also featured, recognized as a leading research-intensive institution. Other significant companies include CAE, a global technology company specializing in simulation training, and Saputo Inc., a global leader in dairy product manufacturing.
A clear pattern among these companies is their long-standing presence, with many established mid-20th century or earlier. CN, a North American transportation and logistics leader, was founded in 1919, and McGill University in 1821. This suggests a mature corporate landscape in Montreal, with a mix of foundational institutions and established global players.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 71,968 | ||||
| 2 |
AtkinsRéalisatkinsrealis.com
Global professional services organization specializing in sustainable infrastructure solutions, integrating people, data, and technology across the asset lifecycle in key strategic sectors |
48,091 | |||
| 3 |
McGill Universitymcgill.ca
Leading research-intensive university with diverse international students, multiple campuses, extensive programs, and partnerships with teaching hospitals for healthcare education. |
15,235 | |||
| 4 | 12,816 | ||||
| 5 |
AIESECaiesec.org
AIESEC develops leadership in youth aged 18 to 30 and provides international talent recruitment solutions for organizations worldwide |
12,751 | |||
| 6 | 12,199 | ||||
| 7 |
SNC-Lavalinatkinsrealis.com
Global engineering services and nuclear organization connecting people, data, and technology to transform infrastructure and energy systems worldwide. |
11,913 | |||
| 8 |
WSP in Canadawsp.com
professional services firm unites engineering, advisory, science expertise; shapes communities; advances humanity; delivers projects across sectors globally. |
10,459 | |||
| 9 |
Gildangildancorp.com
Leading global apparel manufacturer with multiple brands, sustainable initiatives, and operations in 12 countries, striving to Make Apparel Better® |
9,923 | |||
| 10 | 9,150 | ||||
| 11 |
Concordia Universityconcordia.ca
A top-ranked university in Montreal, continually reimagining higher education, offering experiential learning and cross-functional research to a diverse, engaged student body. |
8,419 | |||
| 12 |
Saputo Inc.saputo.com
A global leader in producing and distributing high-quality dairy products, including cheese, milk, cultured products, and dairy ingredients in multiple countries |
7,937 | |||
| 13 |
ALDO Groupaldogroup.com
A leading fashion retailer specializing in stylish and accessible footwear and accessories, with a strong commitment to social responsibility and sustainability |
6,136 | |||
| 14 | 6,113 | ||||
| 15 |
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. |
4,305 | |||
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. | |||||
| 16 |
Cirque du Soleil Entertainment Groupcirquedusoleil.com
global live entertainment company producing multimedia shows, immersive experiences, and special events with diverse artists and creative storytelling. |
4,246 | |||
| 17 |
Lightspeed Commercelightspeedhq.com
cloud-based platform unifies online and physical retail operations, multichannel sales, global payments, financing, and supplier network connections for merchants worldwide |
3,574 | |||
| 18 |
International Civil Aviation Organizationicao.int
A global organization funded by 193 national governments to support diplomacy and cooperation in air transport through research, standardization, and capacity building |
3,016 | |||
| 19 |
Telecontelecon.com
A leading provider of telecom network design, infrastructure, and connectivity services in North America, delivering cost-effective solutions for operators and businesses |
2,970 | |||
| 20 |
Resolute Forest Productsresolutefp.com
Manufacture sustainable pulp, paper, packaging, tissue, lumber, and wood products with operational excellence across North America. |
2,803 | |||
| 21 | 2,720 | ||||
| 22 |
Air Transatairtransat.com
A leading integrated international tourism company specializing in vacation packages, hotel stays, and air travel to over 60 destinations in the Americas and Europe Committed to sustainable tourism development |
2,686 | |||
| 23 |
Raymond Chabot Grant Thorntonrcgt.com
A leading accounting firm with over 2,300 professionals offering assurance, taxation, consulting, and business recovery services in Quebec and globally |
2,426 | |||
| 24 |
Alithyaalithya.com
A global digital technology services company providing practical IT solutions tailored to complex business challenges, with a focus on strategy and digital transformation |
2,418 | |||
| 25 |
La Caisse (Caisse de dépôt et placement du Québec)lacaisse.com
Global investment group managing funds for public retirement and insurance plans, focusing on major financial markets, private equity, infrastructure, real estate, and private debt |
2,389 | |||
| 26 |
Genetecgenetec.com
Develops open-platform software and hardware unifying physical security, public safety, and operations for organizations to simplify complexity and improve visibility across environments. |
2,320 | |||
| 27 |
La Vie En Roselavieenrose.com
Canadian company specializing in affordable, high-quality lingerie, sleepwear, swimwear, and beachwear with extensive retail presence. |
2,267 | |||
| 28 |
Metro Supply Chainmetroscg.com
Providing tailored, technology-driven supply chain and distribution solutions across North America and Europe with extensive operational space and expert teams. |
2,191 | |||
| 29 |
Pharmasciencecarrieres.pharmascience.com
A leading pharmaceutical company in Quebec, with global reach and strong R&D investment, committed to employee development and recognized as a Great Place to Work |
2,016 | |||
| 30 |
Kruger Inc.kruger.com
A forward-looking organization with diverse operations in pulp and paper, packaging, green energy, tissue products, recycling, and biomaterials, focusing on sustainability and responsible resource use |
1,739 | |||
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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 11, 2026.
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- IT Services and IT Consulting companies in Montreal 70
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- Professional services firms in Montreal 65
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- Public sector organisations in Montreal 57
- Education providers in Montreal 53
- Manufacturers in Montreal 53
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- Distributors and wholesalers in Montreal 36
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The same list elsewhere in Canada
- Multinational companies in Canada 1,934
- Multinational companies in Ontario 901
- Multinational companies in the province of Quebec 386
- Multinational companies in British Columbia 260
- Multinational companies in Alberta 240
- Multinational companies in Manitoba 42
- Multinational companies in Toronto 377
- Multinational companies in Vancouver 138
- Multinational companies in Calgary 130
- Multinational companies in Mississauga 119
- Multinational companies in Edmonton 47
- Multinational companies in Ottawa 42
- Multinational companies in Markham 37
- Multinational companies in Vaughan 32
- Multinational companies in Winnipeg 32
- Multinational companies in Brampton 30
- Multinational companies in Richmond 27