This selection of corporate groups and holding companies in Alberta includes firms across various industries, with a notable presence in construction, oil and gas, and civil engineering. The companies range from large, established entities to younger firms, indicating a mix of mature industries and developing sectors.
PCL Construction operates in civil infrastructure and industrial markets, while ATCO is a diversified corporation providing essential services. Mullen Group Ltd. offers logistics across North America, and SCM Insurance Services provides insurance claims and risk management. A common theme among these companies is their significant employee base, suggesting large-scale operations within Alberta and beyond.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
PCL Constructionpcl.com
Independent construction companies operating in civil infrastructure, heavy industrial, and building markets across multiple countries with employee ownership. |
12,795 | |||
| 2 | 7,064 | ||||
| 3 |
Mullen Group Ltd.
Provides logistics across North America including warehousing, truckload, and specialized hauling. Also offers services for energy, mining, forestry, and construction industries in western Canada. |
5,001 | |||
| 4 |
MLSE (Maple Leaf Sports & Entertainment Partnership)mlse.com
A leading provider of sport and entertainment experiences in North America, owning major sports teams and operating venues for live events |
3,105 | |||
| 5 |
Leon's Furnitureleons.ca
Canadian owned and operated company selling a wide range of furniture, major appliances, and home electronics, offering affordable and family-friendly home furnishings. |
1,800 | |||
| 6 |
WSP | MMM Groupwspgroup.ca
A Canadian multinational specializing in engineering consulting, urban planning, environmental remediation, and sustainable transportation solutions with a global presence |
1,788 | |||
| 7 |
SCM Insurance Serviceswww1.scm.ca
Provider of insurance claims adjusting, risk management, investigative, surveillance, forensic engineering, accounting services with innovative technology, expert staff, solid customer service across Canada and the United States |
1,604 | |||
| 8 |
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 | |||
| 9 |
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 | |||
| 10 |
PTW Energy Servicesptwenergy.com
Industry solutions provider delivering construction, fabrication, and maintenance services with a network across North America, serving various industrial sectors with innovative solutions |
1,245 | |||
| 11 | 1,202 | ||||
| 12 |
North American Construction Groupnacg.ca
A provider of mining and heavy construction services in the Canadian oil sands, with over 60 years of experience and a large equipment fleet |
1,113 | |||
| 13 |
Associated Engineeringae.ca
A Canadian company specializing in building sustainable communities, providing engineering and environmental consulting services, and offering creative solutions for clients worldwide |
1,101 | |||
| 14 | 1,043 | ||||
| 15 |
Propak Systems Ltd.propaksystems.com
Specializing in energy processing solutions since 1976, our focus is on quality craftsmanship, on-time delivery, modular design, engineering, and fabrication for oil and gas production |
854 | |||
| 16 |
Gran Tierra Energygrantierra.com
Oil and gas exploration and production company focused on Colombia and Ecuador, creating value through global experience in a transparent and responsible manner |
820 | |||
| 17 |
Calgary Sports and Entertainment Corporationnhl.com
Professional sports and entertainment company based in Calgary, Alberta, managing teams in NHL, WHL, NLL, CFL, and AHL |
817 | |||
| 18 |
Peoples Grouppeoplesgroup.com
Provides deposits, lending, and payment services supporting fintechs, brokers, and merchants to foster a competitive Canadian financial ecosystem. |
790 | |||
| 19 |
Java Holdings Ltdjavaholdings.ca
A family-owned investments and management business with operational units in construction, electrical services, energy, aviation, hydroelectric, and project management |
765 | |||
| 20 |
Black Diamond Groupblackdiamondgroup.com
Specializing in modular buildings and remote workforce accommodations, providing comprehensive solutions including rentals, sales, and crew travel management through digital platforms |
744 | |||
| 21 | 733 | ||||
| 22 |
Stream-Flo Industriesstreamflo.com
A privately-owned company in the energy industry, manufacturing a variety of valves and offering services for maintenance, installation, and rentals globally |
671 | |||
| 23 |
Colas Western Canada Inc.colascanada.ca
A group of companies in Western Canada specializing in pavement repair, highway maintenance, asphalt testing, road markings, and infrastructure solutions for a safer travel experience |
652 | |||
| 24 |
Fort McKay Group of Companies LPfortmckaygroup.com
Provides earthworks, site services, fleet maintenance, fuel, reclamation, logistics, and mechanical services for oilfield industry in Alberta. |
587 | |||
| 25 | 569 | ||||
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| 26 |
Rohit Grouprohitgroup.com
A vertically integrated enterprise in North America, specializing in real estate development and management, with a strong focus on community enrichment |
563 | |||
| 27 | 559 | ||||
| 28 |
Rocky Mountain Equipmentrockymtn.com
Agriculture and construction equipment dealership consolidator operating in Alberta, Saskatchewan, and Manitoba, focused on CNH brands, with a commitment to customer satisfaction |
554 | |||
| 29 |
Strike Grouplinktr.ee
Western Canada's leading provider of infrastructure construction and maintenance services for energy, petrochemical, mining, and agriculture sectors, emphasizing community involvement and safety |
527 | |||
| 30 |
KAG Canadakagcanada.ca
Canadian service group for North Americaβs largest tank truck transporter and logistics provider, serving agriculture, energy, petroleum, and mining industries. |
499 | |||
| 31 |
Trotter & Morton Group of Companiestrotterandmorton.com
A building trades expert focused on iconic projects, attracting top talent through diverse divisions and fostering growth in the construction industry |
473 | |||
| 32 |
Forbes Bros. Group of Companiesforbesbrosgroup.com
A privately-held utility construction contractor with operations across North America, specializing in powerline construction and fleet management for large transmission projects |
385 | |||
| 33 |
Alberta Innovatesalbertainnovates.ca
This organization fosters innovation and entrepreneurship in Alberta to address global health, nature, energy, food, and fiber challenges through partnerships and technology |
382 | |||
| 34 |
Thompson Construction Groupthompsoncg.ca
Alberta-based contractor specializing in heavy civil earth moving, highway, oil sands plant construction, and workplace safety with multiple locations and partnerships |
381 | |||
| 35 |
Nuna Group of Companiesnunagroup.com
A heavy civil construction company specializing in remote projects, earthworks, and contract mining with a focus on Indigenous employment and training |
370 | |||
| 36 |
Sureway Construction Group Ltd.sureway.ca
This civil general contractor in Alberta offers expertise in Greenfield & Brownfield projects with a large equipment fleet, financial strength, and experienced teams |
368 | |||
| 37 |
Volker Stevinvolkerstevin.ca
A construction and project management company dedicated to providing quality services, building long-term relationships, and promoting safety, professionalism, and growth |
364 | |||
| 38 |
DCM Group Inc.dcmgroup.ca
DCM Group provides construction services to various industries in Canada, specializing in complex projects with a focus on safety and expertise |
322 | |||
| 39 | 273 | ||||
| 40 |
Athabasca Oil Corporationatha.com
Intermediate producer in Canada's resource plays β Montney, Duvernay, Oil Sands Strong growth potential, dynamic work environment Publicly traded on TSX |
255 | |||
| 41 |
Tidewater Midstream and Infrastructuretidewatermidstream.com
A company in Western Canada specializing in natural gas processing, fractionation, liquids upgrading, storage, transportation, and marketing |
242 | |||
| 42 |
Wolf Midstreamwolfmidstream.com
Calgary-based energy infrastructure provider with focus on Western Canada, backed by CPPIB Expert in midstream solutions, customer-focused with long-term investments and regulatory compliance |
212 | |||
| 43 |
Joey's Restaurantsjoeysfranchisegroup.com
A leading seafood chain with over 45 locations in Canada, known for serving famous fish & chips and introducing a new fast-casual concept |
193 | |||
| 44 | 191 | ||||
| 45 |
High Arctic Energy Serviceshaes.ca
A leading provider of specialized Rentals and Nitrogen Services in the oil and gas industry, with over 25 years of experience and a strong reputation for innovative solutions |
184 | |||
| 46 |
WQS Groupwqsgoc.com
Certified Aboriginal Business offering Non-Destructive Testing and Evaluation Services in Western Canada, with hands-on owner involvement and focus on client relationships |
181 | |||
| 47 |
Power Corporation of Canadapowercorporation.com
International management and holding company focusing on financial services in North America, Europe, and Asia, with core holdings in insurance, retirement, wealth management, and investments |
146 | |||
| 48 |
CanElson Drilling Inc.
A leading provider of oilfield services specializing in operating land-based contract drilling rigs and offering gas transportation solutions |
87 | |||
| 49 |
Jaffer Group of Companiesjaffergroup.com
A diverse group of businesses in real estate, construction, hospitality, consulting, staffing, and knowledge management, focused on empowering partners and clients for success |
39 | |||
| 50 |
Coril Holdings Ltd.coril.com
A privately-owned parent company based in Calgary with diverse investments in railway services, real estate, wellness, and sustainable businesses |
20 | |||
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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 Alberta
- The largest companies in Alberta 1,391
- Oil and Gas companies in Alberta 314
- Energy companies in Alberta 267
- Multinational companies in Alberta 240
- Critical infrastructure operators in Alberta 124
- Manufacturers in Alberta 113
- Retail chains in Alberta 101
- Construction companies in Alberta 83
- Professional services firms in Alberta 81
- Hardware manufacturers in Alberta 76
- Logistics companies in Alberta 76
- Companies with in-house R&D in Alberta 74
- Public sector organisations in Alberta 71
- Publicly traded companies in Alberta 68
- Education providers in Alberta 64
- Financial services firms in Alberta 57
- Truck Transportation companies in Alberta 55
- Consulting firms in Alberta 54
- SaaS companies in Alberta 54
- Distributors and wholesalers in Alberta 53
- IT Services and IT Consulting companies in Alberta 47
- Software Development companies in Alberta 45
- Healthcare providers in Alberta 41
- IT services companies in Alberta 39
The same list elsewhere in Canada
- Corporate groups and holding companies in Canada 318
- Corporate groups and holding companies in Ontario 117
- Corporate groups and holding companies in the province of Quebec 75
- Corporate groups and holding companies in British Columbia 33
- Corporate groups and holding companies in Toronto 48
- Corporate groups and holding companies in Montreal 39