# 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).

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.

🇦🇺 Western Australia · 29 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [South32](https://www.tamtam.ai/c/south32) (south32.net)<br>Specializing in developing natural resources, we aim to enhance lives for present and future generations, trusted to unlock resource potential | Mining | 🇦🇺 Perth | 5,267 | 2014 |
| 2 | [Mineral Resources Limited](https://www.tamtam.ai/c/mineral-resources-limited) (mineralresources.com.au)<br>A leading diversified resources company operating in lithium, iron ore, energy, and mining services in Western Australia, known for innovation and strong performance | Mining | 🇦🇺 Osborne Park | 4,163 | 1993 |
| 3 | [Macmahon](https://www.tamtam.ai/c/macmahon) (macmahon.com.au)<br>An ASX-listed mining services company with expertise in both surface and underground mining, focusing on strong client relationships, safety, and sustainability | Mining | 🇦🇺 Perth | 3,292 | 1963 |
| 4 | [Byrnecut](https://www.tamtam.ai/c/byrnecut) (byrnecut.com)<br>Internationally renowned specialist in underground mining contracting, offering a comprehensive range of services with skilled operators and state-of-the-art equipment | Mining | 🇦🇺 Perth Airport | 2,358 | 1987 |
| 5 | [Cash Converters](https://www.tamtam.ai/c/cash-converters) (cashconverters.com)<br>Providing subprime loans and selling secondhand goods, supporting customers with financial solutions and affordable products across Australia. | Retail | 🇦🇺 Perth | 2,264 | 1984 |
| 6 | [ABN Group](https://www.tamtam.ai/c/abn-group) (abngroup.com.au)<br>Leading Australian group providing home design, construction, land development, finance, and related services with strong community and quality focus. | Building Construction | 🇦🇺 Leederville | 2,096 | 1978 |
| 7 | [Austal](https://www.tamtam.ai/c/austal) (austal.com)<br>A global shipbuilder that designs, constructs, and sustains advanced commercial and defence vessels, with a focus on aluminium shipbuilding and international projects | Shipbuilding | 🇦🇺 Henderson | 1,937 | 1988 |
| 8 | [Newmont Australia](https://www.tamtam.ai/c/newmont-australia) (newmont.com)<br>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 | 🇦🇺 Subiaco | 1,504 | 1921 |
| 9 | [CFC Group](https://www.tamtam.ai/c/cfc-group) (cfc.com.au)<br>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 | 🇦🇺 Perth | 1,420 |  |
| 10 | [Lycopodium](https://www.tamtam.ai/c/lycopodium) (lycopodium.com)<br>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 | 🇦🇺 Perth | 1,239 | 1992 |
| 11 | [AusGroup - AGC \| MAS](https://www.tamtam.ai/c/ausgroup-agc-mas) (altrad.com.au)<br>An experienced project and asset services provider offering fabrication, construction, maintenance, scaffolding, industrial coatings, and specialty services to various industries | Construction | 🇦🇺 Subiaco | 1,202 |  |
| 12 | [MMA Offshore](https://www.tamtam.ai/c/mma-offshore) (cyanrenewables.com)<br>Specializes in high-specification vessel provision and marine/subsea services for offshore energy and maritime industries, cautioning against phishing schemes | Maritime Transportation | 🇦🇺 Perth | 1,042 | 1982 |
| 13 | [Iluka Resources](https://www.tamtam.ai/c/iluka-resources) (iluka.com)<br>Global critical minerals company specializing in exploration, mining, processing, and marketing of zircon, titanium feedstocks, and rare earth elements. | Mining | 🇦🇺 Perth | 895 |  |
| 14 | [Duratec](https://www.tamtam.ai/c/duratec) (duratec.com.au)<br>Specializing in steel and concrete protection and remediation, offering cost-effective solutions to extend asset life through innovative programs and methodologies | Construction | 🇦🇺 Wangara | 873 |  |
| 15 | [Calibre](https://www.tamtam.ai/c/calibre) (wsp.com)<br>A global engineering firm offering design, engineering, advisory, and environmental services with expertise in EPCM project delivery and major capital projects | Mining | 🇦🇺 Perth | 834 | 1993 |
| 16 | [Five Group Pty Ltd](https://www.tamtam.ai/c/five-group-pty-ltd) (thefivegroup.com.au)<br>A group of engineering, surveying, and architectural drafting companies operating in Australia and South East Asia with subsidiaries in various specialized areas | Construction | 🇦🇺 Balcatta | 642 |  |
| 17 | [RSC](https://www.tamtam.ai/c/rsc) (rscmme.com)<br>Global geological services company offering practical solutions from exploration to remediation, prioritizing client needs, team well-being, and integrity in all operations | Mining | 🇦🇺 Perth | 619 | 2008 |
| 18 | [SCEE Electrical](https://www.tamtam.ai/c/scee-electrical) (sceeelectrical.com.au)<br>A national provider of electrical services to resources and infrastructure sectors, offering maintenance, instrumentation, communication, and smart energy solutions with proven expertise | Construction | 🇦🇺 Perth | 544 | 1978 |
| 19 | [Tattarang](https://www.tamtam.ai/c/tattarang) (tattarang.com)<br>A private investment group in Australia that spans various sectors and asset classes, focusing on using capital for positive impact | Investment Management | 🇦🇺 Perth | 533 |  |
| 20 | [Bhagwan Marine](https://www.tamtam.ai/c/bhagwan-marine) (bhagwanmarine.com)<br>A leading marine solutions provider offering offshore, inshore, and subsea services, engineering, civil construction support, and project management across various industries | Maritime | 🇦🇺 Perth | 468 | 1998 |
| 21 | [Automotive Holdings Group (AHG)](https://www.tamtam.ai/c/automotive-holdings-group-ahg) (eagersautomotive.com.au)<br>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 | 🇦🇺 West Perth | 453 | 1913 |
| 22 | [GR Engineering Services Ltd](https://www.tamtam.ai/c/gr-engineering-services-ltd) (gres.com.au)<br>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 | 🇦🇺 Ascot | 447 | 2006 |
| 23 | [CSBP](https://www.tamtam.ai/c/csbp) (csbp.com.au)<br>Major supplier of chemicals, fertilisers, and related services to mining, industrial, and agricultural sectors within a division of Wesfarmers Limited | Chemical Manufacturing | 🇦🇺 Kwinana | 445 | 1910 |
| 24 | [Sandfire](https://www.tamtam.ai/c/sandfire) (sandfire.com.au)<br>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 | 🇦🇺 West Perth | 403 |  |
| 25 | [JWH Group](https://www.tamtam.ai/c/jwh-group) (jwhgroup.com.au)<br>A leading residential building group in Western Australia, offering a range of homes from affordable to luxury for various lifestyles and locations | Construction | 🇦🇺 Osborne Park | 335 | 1983 |
| 26 | [Summit Homes Group](https://www.tamtam.ai/c/summit-homes-group) (summithomes.com.au)<br>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 | 🇦🇺 Myaree | 319 | 1978 |
| 27 | [Cyan Renewables](https://www.tamtam.ai/c/cyan-renewables) (cyanrenewables.com)<br>A leading offshore wind farm vessel owner in Asia supporting global offshore wind projects with a focus on Singapore and Denmark | Maritime Transportation | 🇦🇺 Perth | 312 | 2021 |
| 28 | [Scott Park Group Pty Ltd](https://www.tamtam.ai/c/scott-park-group-pty-ltd) (scottparkgroup.com.au)<br>Residential building industry leader in Western Australia, known for commitment to customer service and quality homes Brands include Redink Homes and B1 Homes | Construction | 🇦🇺 Osborne Park | 183 | 2006 |
| 29 | [Parabellum International](https://www.tamtam.ai/c/parabellum-international) (parabellum.com.au)<br>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 | 🇦🇺 Naval Base | 181 | 2010 |

## 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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## The same list elsewhere in Australia

- [Corporate groups and holding companies in Australia](https://www.tamtam.ai/l/holding-companies-australia) (280)
- [Corporate groups and holding companies in New South Wales](https://www.tamtam.ai/l/holding-companies-new-south-wales) (101)
- [Corporate groups and holding companies in Victoria](https://www.tamtam.ai/l/holding-companies-victoria) (89)
- [Corporate groups and holding companies in Queensland](https://www.tamtam.ai/l/holding-companies-queensland) (37)
- [Corporate groups and holding companies in Sydney](https://www.tamtam.ai/l/holding-companies-sydney) (57)
- [Corporate groups and holding companies in Melbourne](https://www.tamtam.ai/l/holding-companies-melbourne) (38)

## The same list elsewhere

- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,864)

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Source: https://www.tamtam.ai/l/holding-companies-western-australia