# 30 leading multinational companies in Calgary

Tamtam tracks 130 multinational companies headquartered in Calgary. This list ranks the 30 largest by number of employees on LinkedIn, led by Suncor, Enbridge and Canadian Natural Resources Limited (CNRL). Their median headcount is 2,802. Half of them were founded in 1987 or later.

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.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Suncor](https://www.tamtam.ai/c/suncor) (suncor.com)<br>Commercial oil sands development, upgrading, offshore oil and gas production, petroleum refining, and product marketing under Petro-Canada brand. | Oil and Gas | 🇨🇦 Calgary | 14,758 | 1967 |
| 2 | [Enbridge](https://www.tamtam.ai/c/enbridge) (enbridge.com)<br>This company is a leading provider of energy infrastructure, delivering reliable and affordable energy sources while investing in modern infrastructure and resilient communities | Oil and Gas | 🇨🇦 Calgary | 11,855 |  |
| 3 | [Canadian Natural Resources Limited (CNRL)](https://www.tamtam.ai/c/canadian-natural-resources-limited-cnrl) (cnrl.com)<br>Global independent crude oil and natural gas producer with diverse operations in North America, North Sea, and Offshore Africa. | Oil and Gas | 🇨🇦 Calgary | 9,936 | 1989 |
| 4 | [WestJet](https://www.tamtam.ai/c/westjet) (westjet.com)<br>An airline offering scheduled flights to over 100 destinations, vacation packages to 60+ destinations, rewards program, and award-winning customer service | Airlines and Aviation | 🇨🇦 Calgary | 8,899 | 1996 |
| 5 | [TC Energy](https://www.tamtam.ai/c/tc-energy) (tcenergy.com)<br>The company is focused on assisting the world in transitioning to cleaner energy while meeting global demand through innovative solutions | Oil and Gas | 🇨🇦 Calgary | 8,243 | 1951 |
| 6 | [Cenovus Energy](https://www.tamtam.ai/c/cenovus-energy) (cenovus.com)<br>An integrated energy company, operations include oil sands, crude oil, natural gas projects, and downstream upgrading, refining, and marketing across North America, Asia Pacific. | Oil and Gas | 🇨🇦 Calgary | 6,363 | 2009 |
| 7 | [Canadian Pacific](https://www.tamtam.ai/c/canadian-pacific) (cpkcr.com)<br>Transcontinental railway offering freight transportation, logistics solutions, and supply chain expertise with access to major North American and global markets. | Rail Transportation | 🇨🇦 Calgary | 4,761 |  |
| 8 | [Enerflex Ltd.](https://www.tamtam.ai/c/enerflex-ltd) (enerflex.com)<br>Global provider of energy infrastructure and transition solutions, specializing in natural gas, low-carbon, and water treatment solutions for a sustainable future | Oil and Gas | 🇨🇦 Calgary | 3,578 | 1980 |
| 9 | [Graham](https://www.tamtam.ai/c/graham) (grahambuilds.com)<br>An employee-owned construction partner offering general contracting, design-build, construction management, and P3 services across buildings, industrial, and infrastructure sectors | Construction | 🇨🇦 Calgary | 3,379 | 1926 |
| 10 | [CPKC](https://www.tamtam.ai/c/cpkc) (cpkcr.com)<br>Specializing in innovative freight transportation services, CPKC connects North America with a single-line rail network, enhancing safety, efficiency, and sustainability in key markets | Rail Transportation | 🇨🇦 Calgary | 3,358 |  |
| 11 | [Agrium](https://www.tamtam.ai/c/agrium) (nutrien.com)<br>A leading provider of crop inputs and services focused on sustainable food production, innovation, and long-term success for customers and stakeholders | Chemical Manufacturing | 🇨🇦 Calgary | 3,077 | 1931 |
| 12 | [Ensign Energy Services](https://www.tamtam.ai/c/ensign-energy-services) (ensignenergy.com)<br>A global leader in oilfield services, specializing in land-based drilling and well servicing with a focus on safety, innovation, and exceptional customer experience | Oil and Gas | 🇨🇦 Calgary | 3,047 | 1987 |
| 13 | [Exterran](https://www.tamtam.ai/c/exterran) (enerflex.com)<br>Specializing in acquisition, Exterran offers innovative solutions Recently acquired by Enerflex Ltd, visit their website for the latest updates | Oil and Gas | 🇨🇦 Calgary | 3,012 |  |
| 14 | [AltaGas Ltd.](https://www.tamtam.ai/c/altagas-ltd) (altagas.ca)<br>A leading North American infrastructure company connecting customers to affordable and reliable energy solutions with a strong portfolio in growing markets | Oil and Gas | 🇨🇦 Calgary | 2,838 | 1994 |
| 15 | [Precision Drilling](https://www.tamtam.ai/c/precision-drilling) (precisiondrilling.com)<br>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 | Oil and Gas | 🇨🇦 Calgary | 2,802 |  |
| 16 | [Pembina Pipeline Corporation](https://www.tamtam.ai/c/pembina-pipeline-corporation) (pembina.com)<br>A dynamic energy transportation and midstream provider in Western Canada, with pipelines, gas facilities, and oil infrastructure prioritizing community engagement and employee well-being | Oil and Gas | 🇨🇦 Calgary | 2,464 | 1954 |
| 17 | [NOVA Chemicals](https://www.tamtam.ai/c/nova-chemicals) (novachem.com)<br>Designing and producing high-quality polyethylene resins, investing in recycling infrastructure, and promoting circular economy through innovation and partnerships. | Chemical Manufacturing | 🇨🇦 Calgary | 2,342 | 1975 |
| 18 | [Encana Corporation](https://www.tamtam.ai/c/encana-corporation) (ovintiv.com)<br>A leading North American energy producer focused on growing diverse resource plays, producing natural gas, oil, and natural gas liquids | Oil and Gas | 🇨🇦 Calgary | 2,249 | 2002 |
| 19 | [Bow Valley College](https://www.tamtam.ai/c/bow-valley-college) (bowvalleycollege.ca)<br>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 | Higher Education | 🇨🇦 Calgary | 1,825 | 1965 |
| 20 | [Critical Mass](https://www.tamtam.ai/c/critical-mass) (criticalmass.com)<br>Designing brand experiences, full-service digital agency, global presence, working with top brands, data-driven approach, focus on customer experience and innovative technologies | Advertising Services | 🇨🇦 Calgary | 1,810 | 1996 |
| 21 | [Calfrac Well Services](https://www.tamtam.ai/c/calfrac-well-services) (linktr.ee)<br>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 | Oil and Gas | 🇨🇦 Calgary | 1,629 | 1999 |
| 22 | [Parkland Corporation](https://www.tamtam.ai/c/parkland-corporation) (parkland.ca)<br>Global fuel retailer operating thousands of service stations, convenience stores, and renewable energy solutions across North America and the Caribbean. | Oil and Gas | 🇨🇦 Calgary | 1,619 | 1969 |
| 23 | [ENMAX](https://www.tamtam.ai/c/enmax) (enmax.com)<br>An electricity provider in Alberta for over 100 years, offering safe, reliable energy solutions to warm homes, power businesses, and support communities | Utilities | 🇨🇦 Calgary | 1,613 |  |
| 24 | [TransAlta](https://www.tamtam.ai/c/transalta) (transalta.com)<br>A diverse fleet of electrical generation assets in Canada, the US, and Australia, specializing in clean electricity and sustainable practices | Utilities | 🇨🇦 Calgary | 1,558 | 1911 |
| 25 | [SECURE](https://www.tamtam.ai/c/secure-calgary) (secure.ca)<br>A Calgary-based company offers solutions in environmental waste management, energy infrastructure, and oilfield services, challenging industry norms with diverse customer-driven services | Oil and Gas | 🇨🇦 Calgary | 1,521 | 2007 |
| 26 | [Trimac Transportation](https://www.tamtam.ai/c/trimac-transportation) (trimac.com)<br>bulk trucking transportation, maintenance and wash services, logistics outsourcing, transloading, warehousing, and freight management across North America | Truck Transportation | 🇨🇦 Calgary | 1,444 | 1945 |
| 27 | [Enbridge Pipelines](https://www.tamtam.ai/c/enbridge-pipelines) (enbridge.com)<br>A North American energy leader specializing in transportation, distribution, and clean energy generation including crude oil, natural gas, and renewables | Oil and Gas | 🇨🇦 Calgary | 1,354 |  |
| 28 | [Long View Systems](https://www.tamtam.ai/c/long-view-systems) (longviewsystems.com)<br>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 | IT Services and IT Consulting | 🇨🇦 Calgary | 1,318 | 1999 |
| 29 | [Lafarge Canada](https://www.tamtam.ai/c/lafarge-canada) (amrize.com)<br>A leading provider of sustainable construction materials with a focus on innovative solutions for building better cities and communities across Canada | Construction | 🇨🇦 Calgary | 1,296 |  |
| 30 | [FYihealth group](https://www.tamtam.ai/c/fyihealth-group) (fyihealthgroup.com)<br>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 | Health and Human Services | 🇨🇦 Calgary | 1,291 | 2008 |

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