These Montreal-based companies conduct in-house research and development across diverse sectors. They include large established organizations like Hydro-Québec, a major electricity producer, and educational institutions such as the Université de Montréal. The list also features global technology firms like CAE, which provides simulation training, and Lightspeed Commerce, a cloud-based platform for retail operations. Other notable companies are ALDO Group, a fashion retailer, and Ubisoft Montréal, known for creating computer games.The companies range from public utilities and higher education to software development and retail. A significant portion of these organizations are large employers, indicating a mature R&D landscape in the city. The presence of multiple hospitals and healthcare centers, such as the McGill University Health Centre and CHUM, highlights a strong focus on medical research and innovation within Montreal.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Hydro Québechydroquebec.com
Production, transmission, and distribution of electricity primarily from renewable hydroelectric sources, including research and technology development in energy efficiency. |
16,160 | |||
| 2 |
Université de Montréalumontreal.ca
Leading higher education institution in Quebec with extensive alumni network, affiliated schools, and recognized as a top Canadian employer. |
12,234 | |||
| 3 | 12,199 | ||||
| 4 |
UQAM | Université du Québec à Montréaluqam.ca
A public French-language university known for quality programs, social research, and innovation in creative arts, offering training on campus and regional centers |
6,602 | |||
| 5 |
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 | |||
| 6 |
Centre universitaire de santé McGill | McGill University Health Centrecusm.ca
An internationally recognized academic health institution providing excellent clinical programs, research, and teaching to advance patient care and knowledge in healthcare |
4,668 | |||
| 7 |
CHUM - Centre hospitalier de l'Université de Montréalchumontreal.qc.ca
Provides general, specialized, and highly specialized care to adult patients, conducts research, offers teaching, and promotes health to 40% of Quebec's population. |
4,507 | |||
| 8 |
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 | |||
| 9 |
CIUSSS du Nord-de-l'île-de-Montréalciusssnordmtl.ca
A healthcare organization providing services to over 450,000 residents in Montreal and specialized care to 18 million Quebecers, focusing on research, education, and innovation in health |
3,376 | |||
| 10 |
Pomerleaupomerleau.ca
A leading Canadian construction company specializing in building, infrastructure, and civil engineering projects, integrating innovations and sustainability practices |
3,339 | |||
| 11 |
Ubisoft Montréalmontreal.ubisoft.com
Creating original and memorable gaming experiences since 1997, fostering creativity and diversity among employees to develop iconic franchises that captivate millions worldwide |
2,561 | |||
| 12 |
CHU Sainte-Justinechusj.org
The largest mother-child hospital in Canada, CHU Sainte-Justine employs 5,000 staff and 500 healthcare professionals, prioritizing innovation and patient-centered care |
2,482 | |||
| 13 |
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 | |||
| 14 |
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 | |||
| 15 |
Grass Valleygrassvalley.com
Leading provider of live media technology, offering IP-native cameras, cloud production platforms, and innovative solutions for efficient live content delivery. |
1,408 | |||
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 |
Behaviour Interactivebhvr.com
Develops multiplayer survival horror games, provides external development services, partners with industry leaders, and expands original intellectual properties globally. |
1,249 | |||
| 17 |
Santé Québec - Institut de cardiologie de Montréalicm-mhi.org
A highly specialized hospital focusing on cardiology, dedicated to care, research, education, prevention, rehabilitation, and evaluating new technologies in the field |
1,228 | |||
| 18 |
Centre de recherche du CHUM (CRCHUM)chumontreal.qc.ca
Conducts basic, clinical, and population health research; trains future scientists in a diverse and inclusive environment; recognized as a major Canadian research institution. |
1,132 | |||
| 19 |
Mila - Quebec Artificial Intelligence Institutemila.quebec
A research institute specializing in deep learning founded by Professor Yoshua Bengio, known for contributions to language modeling, machine translation, and more |
995 | |||
| 20 |
College Ahuntsiccollegeahuntsic.qc.ca
Specializing in custom training programs for businesses, integrating experienced educators with professional background to meet diverse training needs in various fields |
985 | |||
| 21 |
Equisoftequisoft.com
Global provider of digital solutions for insurance and investment industry, offering front-end applications, back-office services, data migration expertise, and partnership with top financial institutions worldwide |
908 | |||
| 22 |
Collège de Maisonneuvecmaisonneuve.qc.ca
A recognized higher education institution focused on student success through quality programs, internships, and cultural activities, contributing to research and innovation locally and globally |
849 | |||
| 23 | 842 | ||||
| 24 | 832 | ||||
| 25 |
CellCartacellcarta.com
Global leader in precision medicine testing services offering customized solutions in immunology, proteomics, genomics, and AI pathology for research and clinical trials worldwide |
680 | |||
| 26 |
Avernaaverna.com
Global leader in Test & Quality Solutions, providing expertise in automated test equipment, vision inspection, precision assembly, and innovative solutions for various industries |
632 | |||
| 27 |
AlayaCarealayacare.com
Revolutionary cloud-based home health care software provider offering an end-to-end solution for agencies to innovate and deliver future-focused care |
631 | |||
| 28 | 586 | ||||
| 29 |
Lamourlamour.com
A family-owned group specializing in hosiery, intimates, and performance wear, with a strong supply chain and commitment to exceptional customer service |
555 | |||
| 30 |
Moment Factorymomentfactory.com
Creation and production of immersive multimedia environments combining video, lighting, architecture, sound, and special effects worldwide. |
538 | |||
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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 Montreal
- The largest companies in Montreal 986
- Multinational companies in Montreal 203
- Retail chains in Montreal 85
- SaaS companies in Montreal 71
- IT Services and IT Consulting companies in Montreal 70
- Financial services firms in Montreal 69
- Software Development companies in Montreal 68
- Professional services firms in Montreal 65
- Public sector organisations in Montreal 57
- Education providers in Montreal 53
- Manufacturers in Montreal 53
- Consulting firms in Montreal 52
- Critical infrastructure operators in Montreal 51
- IT services companies in Montreal 51
- E-commerce companies in Montreal 44
- Retail companies in Montreal 44
- AI companies in Montreal 40
- Financial Services companies in Montreal 39
- Corporate groups and holding companies in Montreal 39
- Logistics companies in Montreal 39
- Companies with a mobile app in Montreal 38
- Transportation, Logistics, Supply Chain and Storage companies in Montreal 38
- Distributors and wholesalers in Montreal 36
- Publicly traded companies in Montreal 35
The same list elsewhere in Canada
- Companies with in-house R&D in Canada 678
- Companies with in-house R&D in Ontario 300
- Companies with in-house R&D in the province of Quebec 159
- Companies with in-house R&D in British Columbia 76
- Companies with in-house R&D in Alberta 74
- Companies with in-house R&D in Toronto 93
- Companies with in-house R&D in Calgary 39
- Companies with in-house R&D in Vancouver 34