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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
South32south32.net
Specializing in developing natural resources, we aim to enhance lives for present and future generations, trusted to unlock resource potential |
5,267 | |||
| 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 |
4,163 | |||
| 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 |
3,292 | |||
| 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 |
2,358 | |||
| 5 |
Cash Converterscashconverters.com
Providing subprime loans and selling secondhand goods, supporting customers with financial solutions and affordable products across Australia. |
2,264 | |||
| 6 |
ABN Groupabngroup.com.au
Leading Australian group providing home design, construction, land development, finance, and related services with strong community and quality focus. |
2,096 | |||
| 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 |
1,937 | |||
| 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 |
1,504 | |||
| 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 |
1,420 | |||
| 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 |
1,239 | |||
| 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 |
1,202 | |||
| 12 |
MMA Offshorecyanrenewables.com
Specializes in high-specification vessel provision and marine/subsea services for offshore energy and maritime industries, cautioning against phishing schemes |
1,042 | |||
| 13 |
Iluka Resourcesiluka.com
Global critical minerals company specializing in exploration, mining, processing, and marketing of zircon, titanium feedstocks, and rare earth elements. |
895 | |||
| 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 |
873 | |||
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. | |||||
| 15 | 834 | ||||
| 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 |
642 | |||
| 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 |
619 | |||
| 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 |
544 | |||
| 19 |
Tattarangtattarang.com
A private investment group in Australia that spans various sectors and asset classes, focusing on using capital for positive impact |
533 | |||
| 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 |
468 | |||
| 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 |
453 | |||
| 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 |
447 | |||
| 23 |
CSBPcsbp.com.au
Major supplier of chemicals, fertilisers, and related services to mining, industrial, and agricultural sectors within a division of Wesfarmers Limited |
445 | |||
| 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 |
403 | |||
| 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 |
335 | |||
| 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 |
319 | |||
| 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 |
312 | |||
| 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 |
183 | |||
| 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 |
181 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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.
More company lists in Western Australia
- The largest companies in Western Australia 475
- Mining companies in Western Australia 80
- Multinational companies in Western Australia 75
- Government Administration companies in Western Australia 46
- Publicly traded companies in Western Australia 45
- Critical infrastructure operators in Western Australia 42
- Healthcare providers in Western Australia 37
- Public sector organisations in Western Australia 37
- Professional services firms in Western Australia 37
- Education providers in Western Australia 34
- Hospitals and Health Care companies in Western Australia 31
- Companies with in-house R&D in Western Australia 30
- Construction companies in Western Australia 29
- Manufacturers in Western Australia 26
- Retail chains in Western Australia 25
The same list elsewhere in Australia
- Corporate groups and holding companies in Australia 280
- Corporate groups and holding companies in New South Wales 101
- Corporate groups and holding companies in Victoria 89
- Corporate groups and holding companies in Queensland 37
- Corporate groups and holding companies in Sydney 57
- Corporate groups and holding companies in Melbourne 38