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Top 29 corporate groups and holding companies in Western Australia

Tamtam tracks 29 corporate groups and holding companies headquartered in Western Australia. This list ranks all of them by number of employees on LinkedIn, led by South32, Mineral Resources Limited and Macmahon. Their median headcount is 834. Half of them were founded in 1988 or later. The most common headquarters are Perth (13), Osborne Park (3) and West Perth (2).

馃嚘馃嚭 Western Australia29 companiesUpdated Nov 12, 2026

The corporate groups and holding companies in Western Australia are predominantly large firms in the mining sector, alongside construction, professional services, and retail. Companies like South32, Mineral Resources Limited, Macmahon, and Byrnecut are significant players in mining, while ABN Group specializes in home design and construction, and Austal is a global shipbuilder.

Most of these companies are headquartered in Perth, indicating a concentration of corporate activity in the capital city. A common thread among many of the larger firms is their founding in the late 20th and early 21st centuries, reflecting a period of growth and development in the region's key industries.

#CompanyIndustryHeadquarters EmployeesFounded
1
South32south32.net

Specializing in developing natural resources, we aim to enhance lives for present and future generations, trusted to unlock resource potential

Mining 馃嚘馃嚭 Perth 5,267 2014
2
Mineral Resources Limitedmineralresources.com.au

A leading diversified resources company operating in lithium, iron ore, energy, and mining services in Western Australia, known for innovation and strong performance

Mining 馃嚘馃嚭 Osborne Park 4,163 1993
3
Macmahonmacmahon.com.au

An ASX-listed mining services company with expertise in both surface and underground mining, focusing on strong client relationships, safety, and sustainability

Mining 馃嚘馃嚭 Perth 3,292 1963
4
Byrnecutbyrnecut.com

Internationally renowned specialist in underground mining contracting, offering a comprehensive range of services with skilled operators and state-of-the-art equipment

Mining 馃嚘馃嚭 Perth Airport 2,358 1987
5
Cash Converterscashconverters.com

Providing subprime loans and selling secondhand goods, supporting customers with financial solutions and affordable products across Australia.

Retail 馃嚘馃嚭 Perth 2,264 1984
6
ABN Groupabngroup.com.au

Leading Australian group providing home design, construction, land development, finance, and related services with strong community and quality focus.

Building Construction 馃嚘馃嚭 Leederville 2,096 1978
7
Austalaustal.com

A global shipbuilder that designs, constructs, and sustains advanced commercial and defence vessels, with a focus on aluminium shipbuilding and international projects

Shipbuilding 馃嚘馃嚭 Henderson 1,937 1988
8
Newmont Australianewmont.com

A global gold producer with operations on four continents, including in Australia Included in S&P 500 and Fortune 500, with a focus on sustainability

Mining 馃嚘馃嚭 Subiaco 1,504 1921
9
CFC Groupcfc.com.au

A values-driven investment group with a diverse portfolio in transport, construction, mining, utilities, and property development, supporting partners for success

Business Consulting and Services 馃嚘馃嚭 Perth 1,420 n/a
10
Lycopodiumlycopodium.com

Australian engineering consultancy specializing in project management across various industries, prioritizing client objectives, quality services, and growth through organic expansion and strategic acquisitions

Professional Services 馃嚘馃嚭 Perth 1,239 1992
11
AusGroup - AGC | MASaltrad.com.au

An experienced project and asset services provider offering fabrication, construction, maintenance, scaffolding, industrial coatings, and specialty services to various industries

Construction 馃嚘馃嚭 Subiaco 1,202 n/a
12
MMA Offshorecyanrenewables.com

Specializes in high-specification vessel provision and marine/subsea services for offshore energy and maritime industries, cautioning against phishing schemes

Maritime Transportation 馃嚘馃嚭 Perth 1,042 1982
13
Iluka Resourcesiluka.com

Global critical minerals company specializing in exploration, mining, processing, and marketing of zircon, titanium feedstocks, and rare earth elements.

Mining 馃嚘馃嚭 Perth 895 n/a
14
Duratecduratec.com.au

Specializing in steel and concrete protection and remediation, offering cost-effective solutions to extend asset life through innovative programs and methodologies

Construction 馃嚘馃嚭 Wangara 873 n/a

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15
Calibrewsp.com

A global engineering firm offering design, engineering, advisory, and environmental services with expertise in EPCM project delivery and major capital projects

Mining 馃嚘馃嚭 Perth 834 1993
16
Five Group Pty Ltdthefivegroup.com.au

A group of engineering, surveying, and architectural drafting companies operating in Australia and South East Asia with subsidiaries in various specialized areas

Construction 馃嚘馃嚭 Balcatta 642 n/a
17
RSCrscmme.com

Global geological services company offering practical solutions from exploration to remediation, prioritizing client needs, team well-being, and integrity in all operations

Mining 馃嚘馃嚭 Perth 619 2008
18
SCEE Electricalsceeelectrical.com.au

A national provider of electrical services to resources and infrastructure sectors, offering maintenance, instrumentation, communication, and smart energy solutions with proven expertise

Construction 馃嚘馃嚭 Perth 544 1978
19
Tattarangtattarang.com

A private investment group in Australia that spans various sectors and asset classes, focusing on using capital for positive impact

Investment Management 馃嚘馃嚭 Perth 533 n/a
20
Bhagwan Marinebhagwanmarine.com

A leading marine solutions provider offering offshore, inshore, and subsea services, engineering, civil construction support, and project management across various industries

Maritime 馃嚘馃嚭 Perth 468 1998
21
Automotive Holdings Group (AHG)eagersautomotive.com.au

Leading automotive retail group with over 100 years of history, operating dealerships across Australia and New Zealand offering new/used vehicles, service, parts, and consumer finance

Motor Vehicle Manufacturing 馃嚘馃嚭 West Perth 453 1913
22
GR Engineering Services Ltdgres.com.au

An engineering, consulting, and contracting company specializing in fixed-price design and construction services for the resources and mineral processing industries, both locally and internationally

Mining 馃嚘馃嚭 Ascot 447 2006
23
CSBPcsbp.com.au

Major supplier of chemicals, fertilisers, and related services to mining, industrial, and agricultural sectors within a division of Wesfarmers Limited

Chemical Manufacturing 馃嚘馃嚭 Kwinana 445 1910
24
Sandfiresandfire.com.au

An Australian mining and exploration company focused on safe, consistent, and profitable production, with plans to grow into a globally diversified and sustainable mining company

Mining 馃嚘馃嚭 West Perth 403 n/a
25
JWH Groupjwhgroup.com.au

A leading residential building group in Western Australia, offering a range of homes from affordable to luxury for various lifestyles and locations

Construction 馃嚘馃嚭 Osborne Park 335 1983
26
Summit Homes Groupsummithomes.com.au

Leading Western Australian construction, property, and finance business offering tailored home building journeys with a focus on people and over 40 years of experience

Construction 馃嚘馃嚭 Myaree 319 1978
27
Cyan Renewablescyanrenewables.com

A leading offshore wind farm vessel owner in Asia supporting global offshore wind projects with a focus on Singapore and Denmark

Maritime Transportation 馃嚘馃嚭 Perth 312 2021
28
Scott Park Group Pty Ltdscottparkgroup.com.au

Residential building industry leader in Western Australia, known for commitment to customer service and quality homes Brands include Redink Homes and B1 Homes

Construction 馃嚘馃嚭 Osborne Park 183 2006
29
Parabellum Internationalparabellum.com.au

Provider of emergency response, medical, and risk management services to oil & gas, resources, and construction industries, offering firefighting, medical services, and training Accredited in multiple ISO standards

Mining 馃嚘馃嚭 Naval Base 181 2010

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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.

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