# 30 leading multinational companies in Montreal

Tamtam tracks 203 multinational companies headquartered in Montreal. This list ranks the 30 largest by number of employees on LinkedIn, led by WSP, AtkinsRéalis and McGill University. Their median headcount is 4,305. Half of them were founded in 1967 or later.

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.

🇨🇦 Montreal · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [WSP](https://www.tamtam.ai/c/wsp) (wsp.com)<br>Engineering, advisory, and science-based professional services for transport, infrastructure, property, environment, water, power, energy, and mining sectors across fifty countries globally. | Professional Services | 🇨🇦 Montreal | 71,968 |  |
| 2 | [AtkinsRéalis](https://www.tamtam.ai/c/atkinsrealis) (atkinsrealis.com)<br>Global professional services organization specializing in sustainable infrastructure solutions, integrating people, data, and technology across the asset lifecycle in key strategic sectors | Engineering Services | 🇨🇦 Montreal | 48,091 |  |
| 3 | [McGill University](https://www.tamtam.ai/c/mcgill-university) (mcgill.ca)<br>Leading research-intensive university with diverse international students, multiple campuses, extensive programs, and partnerships with teaching hospitals for healthcare education. | Higher Education | 🇨🇦 Montreal | 15,235 | 1821 |
| 4 | [CN](https://www.tamtam.ai/c/cn) (cn.ca)<br>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 |
| 5 | [AIESEC](https://www.tamtam.ai/c/aiesec-montreal) (aiesec.org)<br>AIESEC develops leadership in youth aged 18 to 30 and provides international talent recruitment solutions for organizations worldwide | Non-profit Organizations | 🇨🇦 Montreal | 12,751 | 1948 |
| 6 | [CAE](https://www.tamtam.ai/c/cae-montreal) (cae.com)<br>A global technology company digitizing the physical world, providing simulation training and critical operations support solutions for pilots, airlines, defense forces | Aviation and Aerospace Component Manufacturing | 🇨🇦 Montreal | 12,199 | 1947 |
| 7 | [SNC-Lavalin](https://www.tamtam.ai/c/snc-lavalin) (atkinsrealis.com)<br>Global engineering services and nuclear organization connecting people, data, and technology to transform infrastructure and energy systems worldwide. | Civil Engineering | 🇨🇦 Montreal | 11,913 |  |
| 8 | [WSP in Canada](https://www.tamtam.ai/c/wsp-in-canada) (wsp.com)<br>professional services firm unites engineering, advisory, science expertise; shapes communities; advances humanity; delivers projects across sectors globally. | Professional Services | 🇨🇦 Montreal | 10,459 | 1959 |
| 9 | [Gildan](https://www.tamtam.ai/c/gildan) (gildancorp.com)<br>Leading global apparel manufacturer with multiple brands, sustainable initiatives, and operations in 12 countries, striving to Make Apparel Better® | Textile Manufacturing | 🇨🇦 Montreal | 9,923 | 1982 |
| 10 | [TAXI](https://www.tamtam.ai/c/taxi) (vml.com)<br>Offers world-class brand, customer, and commerce capabilities as part of VML, with offices in Montréal and New York. | Advertising Services | 🇨🇦 Montreal | 9,150 |  |
| 11 | [Concordia University](https://www.tamtam.ai/c/concordia-university) (concordia.ca)<br>A top-ranked university in Montreal, continually reimagining higher education, offering experiential learning and cross-functional research to a diverse, engaged student body. | Higher Education | 🇨🇦 Montreal | 8,419 | 1974 |
| 12 | [Saputo Inc.](https://www.tamtam.ai/c/saputo-inc) (saputo.com)<br>A global leader in producing and distributing high-quality dairy products, including cheese, milk, cultured products, and dairy ingredients in multiple countries | Food and Beverage Manufacturing | 🇨🇦 Montreal | 7,937 | 1954 |
| 13 | [ALDO Group](https://www.tamtam.ai/c/aldo-group) (aldogroup.com)<br>A leading fashion retailer specializing in stylish and accessible footwear and accessories, with a strong commitment to social responsibility and sustainability | Retail | 🇨🇦 Montreal | 6,136 | 1972 |
| 14 | [Logica](https://www.tamtam.ai/c/logica) (cgi.com)<br>Global provider of IT and business process services, offering consulting, integration, and outsourcing with a team of 69,000 professionals across 40 countries | IT Services and IT Consulting | 🇨🇦 Montreal | 6,113 |  |
| 15 | [Cogeco Inc.](https://www.tamtam.ai/c/cogeco-inc) (corpo.cogeco.com)<br>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 |
| 16 | [Cirque du Soleil Entertainment Group](https://www.tamtam.ai/c/cirque-du-soleil-entertainment-group) (cirquedusoleil.com)<br>global live entertainment company producing multimedia shows, immersive experiences, and special events with diverse artists and creative storytelling. | Entertainment Providers | 🇨🇦 Montreal | 4,246 | 1984 |
| 17 | [Lightspeed Commerce](https://www.tamtam.ai/c/lightspeed-commerce) (lightspeedhq.com)<br>cloud-based platform unifies online and physical retail operations, multichannel sales, global payments, financing, and supplier network connections for merchants worldwide | Software Development | 🇨🇦 Montreal | 3,574 | 2005 |
| 18 | [International Civil Aviation Organization](https://www.tamtam.ai/c/international-civil-aviation-organization) (icao.int)<br>A global organization funded by 193 national governments to support diplomacy and cooperation in air transport through research, standardization, and capacity building | Airlines and Aviation | 🇨🇦 Montreal | 3,016 | 1944 |
| 19 | [Telecon](https://www.tamtam.ai/c/telecon) (telecon.com)<br>A leading provider of telecom network design, infrastructure, and connectivity services in North America, delivering cost-effective solutions for operators and businesses | Telecommunications | 🇨🇦 Montreal | 2,970 | 1967 |
| 20 | [Resolute Forest Products](https://www.tamtam.ai/c/resolute-forest-products) (resolutefp.com)<br>Manufacture sustainable pulp, paper, packaging, tissue, lumber, and wood products with operational excellence across North America. | Paper and Forest Product Manufacturing | 🇨🇦 Montreal | 2,803 |  |
| 21 | [Nuvei](https://www.tamtam.ai/c/nuvei) (nuvei.com)<br>Global fintech provider empowering businesses with next-gen payment solutions, card issuing, banking services, risk management, and insights for seamless operations in over 200 markets | Financial Services | 🇨🇦 Montreal | 2,720 | 2003 |
| 22 | [Air Transat](https://www.tamtam.ai/c/air-transat) (airtransat.com)<br>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 | Airlines and Aviation | 🇨🇦 Montreal | 2,686 | 1987 |
| 23 | [Raymond Chabot Grant Thornton](https://www.tamtam.ai/c/raymond-chabot-grant-thornton) (rcgt.com)<br>A leading accounting firm with over 2,300 professionals offering assurance, taxation, consulting, and business recovery services in Quebec and globally | Professional Services | 🇨🇦 Montreal | 2,426 | 1948 |
| 24 | [Alithya](https://www.tamtam.ai/c/alithya) (alithya.com)<br>A global digital technology services company providing practical IT solutions tailored to complex business challenges, with a focus on strategy and digital transformation | IT Services and IT Consulting | 🇨🇦 Montreal | 2,418 |  |
| 25 | [La Caisse (Caisse de dépôt et placement du Québec)](https://www.tamtam.ai/c/la-caisse-caisse-de-depot-et-placement-du-quebec) (lacaisse.com)<br>Global investment group managing funds for public retirement and insurance plans, focusing on major financial markets, private equity, infrastructure, real estate, and private debt | Financial Services | 🇨🇦 Montreal | 2,389 | 1965 |
| 26 | [Genetec](https://www.tamtam.ai/c/genetec) (genetec.com)<br>Develops open-platform software and hardware unifying physical security, public safety, and operations for organizations to simplify complexity and improve visibility across environments. | Software Development | 🇨🇦 Montreal | 2,320 | 1997 |
| 27 | [La Vie En Rose](https://www.tamtam.ai/c/la-vie-en-rose) (lavieenrose.com)<br>Canadian company specializing in affordable, high-quality lingerie, sleepwear, swimwear, and beachwear with extensive retail presence. | Retail | 🇨🇦 Montreal | 2,267 | 1985 |
| 28 | [Metro Supply Chain](https://www.tamtam.ai/c/metro-supply-chain) (metroscg.com)<br>Providing tailored, technology-driven supply chain and distribution solutions across North America and Europe with extensive operational space and expert teams. | Transportation, Logistics, Supply Chain and Storage | 🇨🇦 Montreal | 2,191 | 1974 |
| 29 | [Pharmascience](https://www.tamtam.ai/c/pharmascience) (carrieres.pharmascience.com)<br>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 | Pharmaceutical Manufacturing | 🇨🇦 Montreal | 2,016 | 1983 |
| 30 | [Kruger Inc.](https://www.tamtam.ai/c/kruger-inc) (kruger.com)<br>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 | Paper and Forest Product Manufacturing | 🇨🇦 Montreal | 1,739 | 1904 |

## 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 Montreal

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- [Professional services firms in Montreal](https://www.tamtam.ai/l/professional-services-firms-montreal) (65)
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- [Education providers in Montreal](https://www.tamtam.ai/l/education-companies-montreal) (53)
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- [Critical infrastructure operators in Montreal](https://www.tamtam.ai/l/critical-infrastructure-operators-montreal) (51)
- [IT services companies in Montreal](https://www.tamtam.ai/l/it-services-companies-montreal) (51)
- [E-commerce companies in Montreal](https://www.tamtam.ai/l/ecommerce-companies-montreal) (44)
- [Retail companies in Montreal](https://www.tamtam.ai/l/retail-companies-montreal) (44)
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- [Transportation, Logistics, Supply Chain and Storage companies in Montreal](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-montreal) (38)
- [Distributors and wholesalers in Montreal](https://www.tamtam.ai/l/distributors-and-wholesalers-montreal) (36)
- [Publicly traded companies in Montreal](https://www.tamtam.ai/l/publicly-traded-companies-montreal) (35)

## The same list elsewhere in Canada

- [Multinational companies in Canada](https://www.tamtam.ai/l/multinational-companies-canada) (1,934)
- [Multinational companies in Ontario](https://www.tamtam.ai/l/multinational-companies-ontario) (901)
- [Multinational companies in the province of Quebec](https://www.tamtam.ai/l/multinational-companies-province-of-quebec) (386)
- [Multinational companies in British Columbia](https://www.tamtam.ai/l/multinational-companies-british-columbia) (260)
- [Multinational companies in Alberta](https://www.tamtam.ai/l/multinational-companies-alberta) (240)
- [Multinational companies in Manitoba](https://www.tamtam.ai/l/multinational-companies-manitoba) (42)
- [Multinational companies in Toronto](https://www.tamtam.ai/l/multinational-companies-toronto) (377)
- [Multinational companies in Vancouver](https://www.tamtam.ai/l/multinational-companies-vancouver) (138)
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- [Multinational companies in Edmonton](https://www.tamtam.ai/l/multinational-companies-edmonton) (47)
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- [Multinational companies in Brampton](https://www.tamtam.ai/l/multinational-companies-brampton) (30)
- [Multinational companies in Richmond](https://www.tamtam.ai/l/multinational-companies-richmond) (27)

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Source: https://www.tamtam.ai/l/multinational-companies-montreal