This selection of multinational companies in Calgary is dominated by the oil and gas sector, with several major players in energy infrastructure and production. Most of these are large, established firms. Suncor is involved in oil sands development and refining, Enbridge provides energy infrastructure, and Canadian Natural Resources Limited is a global crude oil and natural gas producer.
Beyond energy, WestJet is an airline offering scheduled flights, Canadian Pacific is a transcontinental railway, and Graham is an employee-owned construction partner. The prevalence of companies like TC Energy and Cenovus Energy indicates Calgary's role as a hub for both traditional and transitioning energy solutions.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Suncorsuncor.com
Commercial oil sands development, upgrading, offshore oil and gas production, petroleum refining, and product marketing under Petro-Canada brand. |
14,758 | |||
| 2 |
Enbridgeenbridge.com
This company is a leading provider of energy infrastructure, delivering reliable and affordable energy sources while investing in modern infrastructure and resilient communities |
11,855 | |||
| 3 |
Canadian Natural Resources Limited (CNRL)cnrl.com
Global independent crude oil and natural gas producer with diverse operations in North America, North Sea, and Offshore Africa. |
9,936 | |||
| 4 |
WestJetwestjet.com
An airline offering scheduled flights to over 100 destinations, vacation packages to 60+ destinations, rewards program, and award-winning customer service |
8,899 | |||
| 5 |
TC Energytcenergy.com
The company is focused on assisting the world in transitioning to cleaner energy while meeting global demand through innovative solutions |
8,243 | |||
| 6 |
Cenovus Energycenovus.com
An integrated energy company, operations include oil sands, crude oil, natural gas projects, and downstream upgrading, refining, and marketing across North America, Asia Pacific. |
6,363 | |||
| 7 |
Canadian Pacificcpkcr.com
Transcontinental railway offering freight transportation, logistics solutions, and supply chain expertise with access to major North American and global markets. |
4,761 | |||
| 8 |
Enerflex Ltd.enerflex.com
Global provider of energy infrastructure and transition solutions, specializing in natural gas, low-carbon, and water treatment solutions for a sustainable future |
3,578 | |||
| 9 |
Grahamgrahambuilds.com
An employee-owned construction partner offering general contracting, design-build, construction management, and P3 services across buildings, industrial, and infrastructure sectors |
3,379 | |||
| 10 | 3,358 | ||||
| 11 |
Agriumnutrien.com
A leading provider of crop inputs and services focused on sustainable food production, innovation, and long-term success for customers and stakeholders |
3,077 | |||
| 12 |
Ensign Energy Servicesensignenergy.com
A global leader in oilfield services, specializing in land-based drilling and well servicing with a focus on safety, innovation, and exceptional customer experience |
3,047 | |||
| 13 |
Exterranenerflex.com
Specializing in acquisition, Exterran offers innovative solutions Recently acquired by Enerflex Ltd, visit their website for the latest updates |
3,012 | |||
| 14 |
AltaGas Ltd.altagas.ca
A leading North American infrastructure company connecting customers to affordable and reliable energy solutions with a strong portfolio in growing markets |
2,838 | |||
| 15 |
Precision Drillingprecisiondrilling.com
A leading provider of safe and high-performance services to the oil and gas industry, offering drilling rigs, technology solutions, environmental stewardship, and support services |
2,802 | |||
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 |
Pembina Pipeline Corporationpembina.com
A dynamic energy transportation and midstream provider in Western Canada, with pipelines, gas facilities, and oil infrastructure prioritizing community engagement and employee well-being |
2,464 | |||
| 17 |
NOVA Chemicalsnovachem.com
Designing and producing high-quality polyethylene resins, investing in recycling infrastructure, and promoting circular economy through innovation and partnerships. |
2,342 | |||
| 18 |
Encana Corporationovintiv.com
A leading North American energy producer focused on growing diverse resource plays, producing natural gas, oil, and natural gas liquids |
2,249 | |||
| 19 |
Bow Valley Collegebowvalleycollege.ca
Leading college in Calgary area, empowering students for in-demand careers in business, health care, technology, and social services through innovative education and research initiatives |
1,825 | |||
| 20 |
Critical Masscriticalmass.com
Designing brand experiences, full-service digital agency, global presence, working with top brands, data-driven approach, focus on customer experience and innovative technologies |
1,810 | |||
| 21 |
Calfrac Well Serviceslinktr.ee
Leading provider of specialized oilfield services, including hydraulic fracturing, coiled tubing, and cementing techniques to increase oil and gas production Operating in North America and Argentina |
1,629 | |||
| 22 |
Parkland Corporationparkland.ca
Global fuel retailer operating thousands of service stations, convenience stores, and renewable energy solutions across North America and the Caribbean. |
1,619 | |||
| 23 | 1,613 | ||||
| 24 |
TransAltatransalta.com
A diverse fleet of electrical generation assets in Canada, the US, and Australia, specializing in clean electricity and sustainable practices |
1,558 | |||
| 25 | 1,521 | ||||
| 26 |
Trimac Transportationtrimac.com
bulk trucking transportation, maintenance and wash services, logistics outsourcing, transloading, warehousing, and freight management across North America |
1,444 | |||
| 27 |
Enbridge Pipelinesenbridge.com
A North American energy leader specializing in transportation, distribution, and clean energy generation including crude oil, natural gas, and renewables |
1,354 | |||
| 28 |
Long View Systemslongviewsystems.com
Leading IT solutions provider in North America, specializing in cloud services, IT infrastructure, managed services, and end user support to drive innovative and business-focused solutions |
1,318 | |||
| 29 |
Lafarge Canadaamrize.com
A leading provider of sustainable construction materials with a focus on innovative solutions for building better cities and communities across Canada |
1,296 | |||
| 30 |
FYihealth groupfyihealthgroup.com
A network of optometric clinics focused on providing collaborative, cutting-edge eye care, expanding into retail optical and medical aesthetics with compassion at the forefront |
1,291 | |||
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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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The same list elsewhere in Canada
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