This list of multinational companies in Ottawa is dominated by government entities and technology firms. The Department of National Defence and the Canadian Armed Forces are among the largest employers, alongside Global Affairs Canada and the Royal Canadian Mounted Police. Significant private sector presence includes Shopify, a software development company empowering retail businesses globally, and Costco Wholesale Canada, a major retailer. Harris Computer also features, providing software solutions across various sectors.
The data shows a strong concentration of organizations focused on national security, public administration, and international relations. This is complemented by a robust software development sector, exemplified by companies like Kinaxis, which orchestrates supply chain networks, and Assent, focusing on product compliance. The presence of entities like the Canadian Red Cross indicates a strong non-profit and humanitarian sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Department of National Defence/Ministère de la défense nationalecanada.ca
A government department in Canada responsible for defending national interests, contributing to international peace and security, and supporting the Canadian Forces |
28,747 | |||
| 2 |
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 | |||
| 3 |
Canadian Armed Forces | Forces armées canadiennesforces.ca
Offering over 100 trades, the organization provides world-class qualifications, competitive salaries, benefits, stability, and exciting opportunities for travel, adventure, and making a difference |
20,412 | |||
| 4 |
Global Affairs Canada | Affaires mondiales Canadainternational.gc.ca
Manage diplomatic and consular relations, promote international trade, lead international development and humanitarian assistance efforts for Canada. |
7,379 | |||
| 5 |
Royal Canadian Mounted Police | Gendarmerie royale du Canadarcmp.ca
A national police service in Canada, providing policing at international, federal, provincial, and municipal levels Offers diverse career opportunities and promotes community safety |
5,068 | |||
| 6 |
Canadian Red Crossredcross.ca
An organization within the International Red Cross and Red Crescent Movement providing disaster relief, emergency response, prevention training, capacity building, and community health services |
4,268 | |||
| 7 |
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 | |||
| 8 |
Harris Computerharriscomputer.com
Provides mission-critical software solutions for public sector, healthcare, utilities, and private sectors across North America, Europe, Asia, Australia. |
2,929 | |||
| 9 |
Kinaxiskinaxis.com
Empowering businesses to orchestrate their entire supply chain network, from long-term planning to real-time execution and delivery. |
2,322 | |||
| 10 |
Embassy of Canada | Ambassade du Canadainternational.gc.ca
This organization manages Canada's diplomatic relations, international trade, development efforts, and humanitarian assistance while advancing national interests and values globally |
1,803 | |||
| 11 |
Canadian Forces Morale and Welfare Servicescfmws.ca
The company supports Canadian Armed Forces members and their families worldwide with fitness, recreation, family support, retail, and financial services |
1,407 | |||
| 12 |
Calian Groupcalian.com
Employees engineer reliable solutions solving complex problems for healthcare, communications, learning, and security sectors. Diverse products, services and solutions globally. |
1,396 | |||
| 13 |
Assentassent.com
Provides an AI-native platform for product compliance, sustainability, responsible sourcing, and trade compliance, helping manufacturers reduce supply chain risk and manage data. |
1,052 | |||
| 14 |
Corel Corporationcorel.com
Develops and markets graphics, productivity, and digital media software products for creative professionals and consumers worldwide. |
994 | |||
| 15 |
Canadian Bank Note Company, Limitedcbnco.com
The company specializes in providing secure identification solutions, including currency, passports, driver licenses, and biometric solutions, to prevent fraud globally |
925 | |||
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 |
Royal Canadian Mintmint.ca
The company is a for-profit Crown Corporation responsible for producing coins, managing coinage systems, providing advice on coinage matters, and marketing bullion products |
876 | |||
| 17 |
Nutrition Internationalnutritionintl.org
Global organization delivering proven nutrition interventions in over 60 countries, conducting research, shaping policy, and integrating nutrition into development programs |
743 | |||
| 18 |
Cowater Internationalcowater.com
Global leader in management consulting focusing on developing and emerging economies Specializing in sustainable solutions for governments, organizations, and communities to create lasting impacts |
712 | |||
| 19 |
Digital Opportunity Trustdotrust.org
Support youth innovators to develop and apply digital solutions, collaborating with sectors to drive inclusive community transformation globally. |
695 | |||
| 20 |
World University Service of Canada (WUSC - EUMC)wusc.ca
A Canadian non-profit organization empowering youth worldwide through education, economic opportunities, and resettlement support for student refugees |
653 | |||
| 21 |
Canadian Army | Armée canadiennecanada.ca
The Canadian Army is the land component of the Canadian Armed Forces, producing well-trained soldiers ready for operations at home and abroad |
565 | |||
| 22 |
Versatermversaterm.com
Design and delivery of purpose-built platform solutions enhancing community safety through efficient incident management, fostering just outcomes, and improving emergency response experiences. |
542 | |||
| 23 |
Alludoalludo.com
A global technology company providing professional graphics, virtualization, and productivity solutions tailored for the digital remote workforce, enabling creative and collaborative work anytime, anywhere |
536 | |||
| 24 |
Pythianpythian.com
A global data and analytics services company founded in 1997, specializing in helping organizations transform through data, analytics, and cloud solutions |
526 | |||
| 25 |
Accreditation Canadaaccreditation.ca
Company provides innovative programs tailored to local needs, empowering organizations to meet national and global standards for safe, high-quality care through specialized accreditation and certification programs |
510 | |||
| 26 |
March Networksmarchnetworks.com
Secure cloud-based video solutions integrating POS and ATM systems, enhancing security, operational efficiency, and business insights globally. |
479 | |||
| 27 |
JSIjsitelecom.com
A trusted provider of lawful intelligence and AI-enabled analytics solutions, helping law enforcement and security agencies globally with critical missions |
470 | |||
| 28 |
Croix-Rouge canadiennecroixrouge.ca
The company helps people and communities in need in Canada and around the world, strengthening their resilience through fundamental principles |
425 | |||
| 29 |
Cuso Internationalcusointernational.org
An international organization focused on creating economic and social opportunities for marginalized groups through gender equality, social inclusion, and climate action |
419 | |||
| 30 |
Babcock Canada Inc.babcockcanada.com
A leading international Aerospace, Defence, and Security company providing submarine sustainment, aviation services, aerial wildfire suppression, air medical transportation, and aircrew training |
407 | |||
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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.
More company lists in Ottawa
- The largest companies in Ottawa 350
- Public sector organisations in Ottawa 49
- Critical infrastructure operators in Ottawa 30
- Education providers in Ottawa 30
- Government Administration companies in Ottawa 30
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 Montreal 203
- Multinational companies in Vancouver 138
- Multinational companies in Calgary 130
- Multinational companies in Mississauga 119
- Multinational companies in Edmonton 47
- 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