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The 45 largest publicly traded companies in Western Australia

Tamtam tracks 45 publicly traded companies headquartered in Western Australia. This list ranks all of them by number of employees on LinkedIn, led by Fortescue, Woodside Energy and Monadelphous. Their median headcount is 608. Half of them were founded in 1998 or later. The most common headquarters are Perth (19), West Perth (4) and Osborne Park (3).

馃嚘馃嚭 Western Australia45 companiesUpdated Nov 13, 2026

These publicly traded companies in Western Australia are predominantly large firms in mining and construction, reflecting the region's strong resources sector. Notable examples include Fortescue, which supplies iron ore and develops green energy, and Woodside Energy, operating diversified oil and gas assets. Monadelphous provides engineering services, while Mineral Resources Limited focuses on lithium, iron ore, and energy.

The data shows a concentration of headquarters in Perth, with companies like South32 specializing in natural resource development and Macmahon providing mining services. Austal, a global shipbuilder, is located in Henderson. The prevalence of mining and construction firms highlights the industrial backbone of Western Australia's economy.

#CompanyIndustryHeadquarters EmployeesFounded
1
Fortescuefortescue.com

Supplying global steel industries with iron ore while developing green energy technologies and zero emission solutions to eliminate fossil fuels across operations.

Mining 馃嚘馃嚭 East Perth 10,056 2003
2
Woodside Energywoodside.com

Operate diversified oil and gas assets globally with focus on safety, efficiency, environmental performance, and growth in gas, oil, and new energy sectors.

Oil and Gas 馃嚘馃嚭 Perth 5,933 1954
3
Monadelphousmonadelphous.com.au

An ASX-200 engineering group in Australia, providing construction, maintenance, and industrial services to the resources, energy, and infrastructure sectors

Construction 馃嚘馃嚭 Perth 5,712 1972
4
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
5
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
6
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
7
SRG Globalsrgglobal.com.au

A diversified industrial services provider offering asset maintenance, mining services, engineering, and construction solutions to solve complex problems in major industries

Construction 馃嚘馃嚭 Perth 2,514 1961
8
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
9
Northern Star Resources Limitednsrltd.com

A global-scale Australian gold producer with high-quality mines in Australia and North America, focused on maximizing shareholder returns through acquisitions and exploration

Mining 馃嚘馃嚭 Subiaco 2,163 2003
10
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
11
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
12
Mader Groupmadergroup.com.au

A global provider of technical services in mining, energy, and industrial sectors, optimizing fleet and plant performance with a dedicated team

Mining 馃嚘馃嚭 Perth Airport 1,427 2005
13
Perseus Mining Limitedperseusmining.com

An African-focused gold production, development, and exploration company with projects in Ghana and C么te d鈥橧voire aiming to become a multi-mine gold producer in West Africa

Mining 馃嚘馃嚭 Subiaco 1,356 2004
14
GenusPlus Groupgenus.com.au

Designs, constructs, maintains critical power and communications infrastructure across Australia, including transmission, substations, renewables, and communication solutions, supporting national development and progress.

Construction 馃嚘馃嚭 Belmont 1,276 2018
15
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
16
WBHO Infrastructurewbho.com.au

An international specialist group focused on engineering-led asset maintenance, mining services, and infrastructure solutions

Civil Engineering 馃嚘馃嚭 Subiaco 1,126 n/a
17
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
18
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
19
Westgold Resources Limitedwestgold.com.au

A Western Australian gold miner with 4 underground mines, 3 processing hubs, and >1400 employees, focused on creating wealth for stakeholders

Mining 馃嚘馃嚭 Perth 855 2016
20
Austin Engineering Ltdaustineng.com

Global provider of complex engineering mining solutions worldwide, designing, building, and supporting customised solutions for leading mining companies across six continents

Mining 馃嚘馃嚭 Kewdale 664 n/a
21
St Barbara Limitedstbarbara.com.au

An Australian ASX listed company with gold mining operations in Canada and Papua New Guinea

Mining 馃嚘馃嚭 Perth 637 1969
22
Lynas Rare Earths Ltdlynasrareearths.com

A leading producer of separated Rare Earths with a high-grade mine in Australia and the world's largest processing plant in Malaysia Currently building a new processing facility

Mining 馃嚘馃嚭 Perth 620 n/a

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23
Resolute Mining Limitedrml.com.au

Experienced explorer and developer operating gold mines in Mali and Senegal, utilizing advanced automation systems to produce millions of ounces of gold.

Mining 馃嚘馃嚭 Perth 608 n/a
24
MLGmlgoz.com.au

A founder-led company providing innovative mine site & supply chain solutions to the Australian mining and civil infrastructure industries for over 21 years

Mining 馃嚘馃嚭 Kalgoorlie 568 2002
25
Pilbara Minerals Limitedpilbaraminerals.com.au

Leading ASX-listed pure-play lithium producer with world's largest independent hard-rock lithium operation, focusing on sustainable, low-cost lithium production and supply chain integration

Mining 馃嚘馃嚭 West Perth 554 n/a
26
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
27
Verisveris.com.au

Leading provider of spatial data services in Australia for private and public sectors, delivering innovative solutions through a highly-skilled team

Professional Services 馃嚘馃嚭 Perth 533 2006
28
IGO Ltdigo.com.au

An organization focused on discovering, developing, and delivering clean energy products while maintaining a strong culture of caring for people and stakeholders

Mining 馃嚘馃嚭 South Perth 531 2000
29
West African Resourceswestafricanresources.com

Newest unhedged gold producer in West Africa, with a successful gold pour at Sanbrado Gold Project in Burkina Faso in March 2020

Mining 馃嚘馃嚭 Subiaco 477 2007
30
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
31
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
32
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
33
DUGdug.com

An ASX-listed technology company specializing in analytical software development, big-data services, and high-performance computing, offering innovative solutions and bespoke support globally

Technology, Information and Internet 馃嚘馃嚭 West Perth 444 n/a
34
Emeco Groupemecogroup.com

The world's largest provider of mining equipment rentals offering tailored solutions to drive productivity and efficiency improvements in the industry

Mining 馃嚘馃嚭 Osborne Park 439 1972
35
Pioneer Credit Limitedpioneercredit.com.au

Australian financial services provider specializing in acquiring and servicing retail debt portfolios with a focus on helping customers overcome financial difficulties through outstanding customer service

Financial Services 馃嚘馃嚭 Perth 438 1988
36
Vault Mineralsvaultminerals.com

An ASX-listed gold mining operation in Australia with a major new gold mine ramping up to full production in Western Australia

Mining 馃嚘馃嚭 South Perth 411 n/a
37
Genesis Minerals Limitedgenesisminerals.com.au

Australian gold exploration and mine development company with high quality projects in Western Australia, focused on long-life standalone gold operations and expanding Mineral Resources

Mining 馃嚘馃嚭 Perth 406 2008
38
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
39
Toxfreecleanaway.com.au

A leading waste management company in Australia providing safe, reliable, and sustainable solutions for commercial, industrial, medical, and hazardous waste

Environmental Services 馃嚘馃嚭 Osborne Park 391 2001
40
Regis Resources Ltdregisresources.com.au

A premier gold producer and explorer operating in Australia, with a focus on safe, responsible, and reliable production performance in two project areas

Mining 馃嚘馃嚭 Laverton 327 1987
41
Catalyst Metalscatalystmetals.com.au

Canadian gold producer operating the Plutonic Gold operations in Western Australia, including underground and open pit projects with a focus on expanding production

Mining 馃嚘馃嚭 Subiaco 215 n/a
42
Bentley Perthperth.bentleymotors.com

Luxury car lover's paradise in Western Australia, offering authorized sales and service for Bentley vehicles The go-to destination for Bentley enthusiasts

Motor Vehicle Manufacturing 馃嚘馃嚭 Nedlands 35 1964
43
Euroz Hartleys Group Limitedeurozhartleys.com

A diversified financial services company offering stockbroking, wealth management, funds management, research, institutional sales, private wealth services, and corporate finance advice

Financial Services 馃嚘馃嚭 Perth 22 2000
44
Jobmanjobman.com

Versatile job management software for manufacturing projects, handling job creation, costing, ordering, stock control, and staff productivity in real-time Flexible ERP accessible remotely

Software Development 馃嚘馃嚭 O'Connor 16 n/a
45
Alderan Resourcesalderanresources.com.au

Focused on acquiring and developing advanced copper-gold projects in Utah, USA Listed on ASX

Mining 馃嚘馃嚭 Perth 4 2012

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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 13, 2026.

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