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List of critical infrastructure operators in Gauteng

Tamtam tracks 61 critical infrastructure operators headquartered in Gauteng. This list ranks all of them by number of employees on LinkedIn, led by Standard Bank Group, Eskom Holdings SOC Ltd and MTN. Their median headcount is 2,101. Half of them were founded in 1992 or later. The most common headquarters are Johannesburg (34), Sandton (7) and Centurion (3).

馃嚳馃嚘 Gauteng61 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Standard Bank Groupstandardbank.com

Financial services provider focused on inclusive, sustainable economic development and growth across sub-Saharan Africa with ethical business practices.

Financial Services 馃嚳馃嚘 Johannesburg 70,728 1862
2
Eskom Holdings SOC Ltdeskom.co.za

A leading power utility in South Africa, with a significant presence in electricity generation, transportation, and distribution on the African continent

Utilities 馃嚳馃嚘 Johannesburg 42,862 1923
3
MTNmtn.com

A leading pan-African mobile operator focused on bridging the digital divide and advancing financial inclusion through technology and connectivity solutions

Telecommunications 馃嚳馃嚘 Johannesburg 42,718 n/a
4
Absa Groupabsa.africa

African financial services company focused on growth, with presence in multiple countries and insurance operations across the continent

Financial Services 馃嚳馃嚘 Johannesburg 42,684 2018
5
FNB South Africafnb.co.za

This company values 'help' and practices 'better business; better world' ethos, aiming to drive positive change in people's lives and communities

Banking 馃嚳馃嚘 Johannesburg 32,630 n/a
6
Transnet SOC Ltdtransnet.net

Management of ports, rail, and pipelines to support South Africa's economic growth through infrastructure modernization and strategic partnerships.

Transportation, Logistics, Supply Chain and Storage 馃嚳馃嚘 Johannesburg 27,696 1850
7
Nedbanknedbank.co.za

A financial institution focused on being money experts who make a positive impact on the world through their actions

Financial Services 馃嚳馃嚘 Sandton 21,088 n/a
8
Old Mutual South Africaoldmutual.co.za

A pan-African financial services group offering solutions to retail and corporate customers, focused on creating positive futures for individuals, communities, and society

Financial Services 馃嚳馃嚘 Sandton 18,394 1845
9
Sasolsasol.com

Global chemicals and energy company integrating sophisticated technologies and processes to safely and sustainably produce high-quality products in 23 countries

Chemical Manufacturing 馃嚳馃嚘 Sandton 18,103 1950
10
Vodacomvodacom.co.za

The company leverages technology and the power of humanity to achieve common goals, striving to go further together

Telecommunications 馃嚳馃嚘 Midrand 16,047 1994
11
Telkomtelkom.co.za

South African telecommunications company offering affordable network services, enabling everyday ambitions through reliable connectivity and innovative communication solutions.

Telecommunications 馃嚳馃嚘 Centurion 16,006 1991
12
Discovery Limiteddiscovery.co.za

Leading global company innovating in health, life, and short-term insurance, promoting wellness and shared value through Vitality program.

Financial Services 馃嚳馃嚘 Johannesburg 14,735 1992
13
Old Mutualoldmutual.com

Pan-African financial services company focused on meeting Africa's needs by supporting education, housing, small businesses, and infrastructure development.

Financial Services 馃嚳馃嚘 Johannesburg 13,100 n/a
14
Transnet Freight Railtransnetfreightrail-tfr.net

A leading heavy haul freight rail operator with extensive infrastructure in South Africa and connections to other networks in the sub-Saharan region

Truck Transportation 馃嚳馃嚘 Johannesburg 11,184 n/a
15
Momentum Group Limitedd36xr1heovsi2m.cloudfront.net

Life insurance and financial services group offering retail and specialist brands focused on client empowerment, accountability, and community care.

Financial Services 馃嚳馃嚘 Centurion 9,445 n/a
16
Momentummomentum.co.za

It provides tailored financial solutions and advice, helping clients achieve success through small steps and personalized guidance in finance.

Financial Services 馃嚳馃嚘 Centurion 6,103 n/a
17
Telesure Investment Holdings (TIH)tihsa.co.za

Innovative financial holding company in South Africa, offering insurance, comparison, and investment services to provide peace of mind to customers

Insurance 馃嚳馃嚘 Dainfern 6,011 1998
18
Imperialimperiallogistics.com

Provider of integrated market access and logistics solutions across healthcare, consumer, automotive, chemicals, industrial, and commodities sectors in Africa.

Truck Transportation 馃嚳馃嚘 Johannesburg 5,554 n/a
19
South African Airwaysflysaa.com

Leading carrier in Africa, offering passenger and cargo transport services, maintenance facilities, catering, and regional flights within South Africa and internationally

Airlines and Aviation 馃嚳馃嚘 Johannesburg 5,408 1934
20
Hollard Insurancehollard.co.za

Specialist brokers understand your business needs and ensure coverage where you are, providing tailored insurance solutions

Insurance 馃嚳馃嚘 Johannesburg 5,337 1980
21
African Bankafricanbank.co.za

Providing innovative financial solutions and credit services aimed at enriching lives and supporting customer growth and financial empowerment.

Banking 馃嚳馃嚘 Midrand 4,783 1975
22
PPSpps.co.za

Specializing in financial, investment, and healthcare products for graduate professionals Licensed insurer providing tailored solutions for life insurance needs

Financial Services 馃嚳馃嚘 Johannesburg 4,547 1941
23
RMB - Rand Merchant Bankrmb.co.za

Provides innovative corporate and investment banking services including advisory, funding, trading, and risk management across Africa and globally.

Banking 馃嚳馃嚘 Johannesburg 4,478 n/a
24
City of Ekurhuleniekurhuleni.gov.za

A metropolitan municipality in South Africa focused on sustainable urban integration, job creation, social empowerment, environmental wellbeing, and effective cooperative governance

Government Relations Services 馃嚳馃嚘 Germiston 3,948 n/a
25
Bayport Financial Servicesbayport.co.za

A leading provider of unsecured credit and allied products in South Africa, focusing on building relationships and accessibility for clients

Financial Services 馃嚳馃嚘 Sandton 3,562 2004
26
Airports Company South Africaairports.co.za

Management and operation of nine South African airports, international airport expansions, and partnerships to enhance global airport infrastructure and services.

Aviation and Aerospace Component Manufacturing 馃嚳馃嚘 Kempton Park 2,914 1993
27
South African Reserve Bankresbank.co.za

Central bank focused on maintaining price stability, supporting balanced economic growth, and fostering a fair, competitive market economy in South Africa.

Banking 馃嚳馃嚘 Tshwane 2,699 1921
28
Barclays Africa Group Limited

The company underwent a name change to Absa Group Limited and aims to have one brand across all operations Follow their new LinkedIn page

Financial Services 馃嚳馃嚘 Johannesburg 2,671 1991
29
National Health Laboratory Service

A provider of consumer health services, located in Johannesburg, South Africa, specializing in laboratory testing and diagnostics

Consumer Services 馃嚳馃嚘 Johannesburg 2,381 n/a
30
Openserveopenserve.co.za

A telecommunications infrastructure provider in South Africa, offering the country's largest fixed broadband network as a subsidiary of the Telkom Group Email info@openservecoza

Telecommunications 馃嚳馃嚘 Pretoria 2,106 n/a
31
Vox Telecomvox.co.za

Leading telecom operator offering voice, data, and collaboration services across southern Africa for both business and consumer markets.

Telecommunications 馃嚳馃嚘 Johannesburg 2,101 n/a
32
Comair Limitedcomair.co.za

An innovative and diversified aviation group operating airlines, training, catering, hospitality, and travel services in South Africa and beyond

Airlines and Aviation 馃嚳馃嚘 Johannesburg 2,047 1946
33
Chris Hani Baragwanath Hospitalchrishanibaragwanathhospital.co.za

A hospital and healthcare provider located in Johannesburg, South Africa, serving the community with medical services and care

Hospitals and Health Care 馃嚳馃嚘 Johannesburg 1,999 n/a
34
Airlinkflyairlink.com

A premium airline in South Africa with the largest network in 15 African countries, known for exceptional on-time performance and service excellence

Airlines and Aviation 馃嚳馃嚘 Johannesburg 1,992 1992
35
Bidvest Bank Limitedbidvestbank.co.za

A leading niche bank specializing in foreign exchange services, deposit accounts, investment options, global payments, and asset finance, with international backing

Banking 馃嚳馃嚘 Sandton 1,656 2000
36
FirstRand Corporate Centrefirstrand.co.za

The FirstRand Corporate Centre provides critical functions for a large financial services group, focusing on risk, compliance, governance, and collaboration

Financial Services 馃嚳馃嚘 Sandton 1,622 n/a
37
MMI Holdingsmomentummetropolitan.co.za

A South African financial services group specializing in insurance, asset management, investments, healthcare, and employee benefits with a focus on lifelong financial wellness

Financial Services 馃嚳馃嚘 Pretoria 1,618 n/a
38
Lenmedlenmed.co.za

Established in 1984, the group manages and owns hospitals in South Africa, providing private patient healthcare and related services in Africa

Hospitals and Health Care 馃嚳馃嚘 Johannesburg 1,504 1984
39
Sasol Synfuels International (Pty) Ltd.sasol.com

An oil and energy company based in South Africa that specializes in synthetic fuel production and international operations Located in Johannesburg

Oil and Gas 馃嚳馃嚘 Johannesburg 1,410 1950
40
Johannesburg Waterjohannesburgwater.co.za

The company provides water and wastewater services to a large area, supplying 16 billion liters of water daily and treating 964 Ml of sewage per day

Government Administration 馃嚳馃嚘 Johannesburg 1,264 2001
41
GoTyme Banktymebank.co.za

A digital bank in South Africa focused on simplicity, transparency, and affordability to empower individuals, businesses, and communities with accessible banking

Financial Services 馃嚳馃嚘 Johannesburg 1,206 2012
42
Nedbank Corporate and Investment Bankingcib.nedbank.co.za

Wholesale banking arm providing global markets, transactional, corporate, and investment banking solutions for enduring success and impactful outcomes

Financial Services 馃嚳馃嚘 Johannesburg 1,177 n/a
43
Vumatelvumatel.co.za

A pioneer in Fibre to the Home technology, connecting homes and schools in South Africa with open access high-speed broadband

Telecommunications 馃嚳馃嚘 Bryanston 1,175 2014
44
City Powercitypower.co.za

The company ensures accurate billing, handles adjustments and meter readings, investigates unbilled accounts, resolves customer queries, and submits detailed reports

Appliances, Electrical, and Electronics Manufacturing 馃嚳馃嚘 Johannesburg 1,108 n/a
45
Gibela Rail Transport Consortiumgibela-rail.com

Leading the replacement of South Africa's commuter trains and revitalizing the rail manufacturing industry, transitioning from contract signatures to essential infrastructure provider

Truck Transportation 馃嚳馃嚘 Nigel 1,038 n/a
46
1Life Insurance1life.co.za

This company is a life insurer and financial services provider offering affordable and convenient insurance products to South Africans, with innovative solutions and digital services

Financial Services 馃嚳馃嚘 Morningside 1,035 2006
47
Liquid Intelligent Technologies South Africaliquid.tech

A leading company in connectivity and intelligent technology, paving the way for a digital future in 13 countries in Africa

Telecommunications 馃嚳馃嚘 Midrand 969 n/a
48
FINBOND MUTUAL BANKfinbondmutualbank.co.za

A leading mutual and savings bank in South Africa, offering innovative financial products and services to empower clients and improve their financial well-being

Banking 馃嚳馃嚘 Pretoria 864 2012
49
Clinix Health Group (Pty) Ltdclinix.co.za

A leading healthcare group in South Africa, managing seven hospitals with a focus on quality patient care, innovation, and community contribution

Hospitals and Health Care 馃嚳馃嚘 Johannesburg 805 n/a
50
DFAdfafrica.co.za

This organization builds and manages a dark fibre network in South Africa, providing secure infrastructure to various clients for telecommunications and internet services

Telecommunications 馃嚳馃嚘 Bryanston 784 n/a
51
Bryte Insurance Company Limitedbrytesa.com

A proactive risk specialist in Southern Africa, partnering with customers and brokers to protect businesses and improve risk profiles across the continent

Insurance 馃嚳馃嚘 Johannesburg 740 1965
52
Rand Mutual - RMArandmutual.co.za

A non-profit mutual assurance company offering workers' compensation and insurance solutions to mining, iron, metal, steel industries with compassionate customer service

Insurance 馃嚳馃嚘 Johannesburg 722 1894
53
National Renal Carenrc.co.za

A person-centered health provider focused on improving the health and quality of life for individuals with compromised kidney function

Hospitals and Health Care 馃嚳馃嚘 Illovo 720 1995
54
Johannesburg Road Agency(Pvt) Ltdorg.za

Specializing in roads rehabilitation, traffic management, stormwater management, and bridge maintenance in Johannesburg Part of the City of Joburg network of companies

Government Administration 馃嚳馃嚘 Johannesburg 637 2001
55
RMB - Private Bankrmbprivatebank.com

Private bank providing tailored investment banking solutions, wealth and legacy management services, and a range of financial services for discerning clients

Banking 馃嚳馃嚘 Sandton 601 n/a
56
MetroFibremetrofibre.co.za

This company provides highly managed fibre optic broadband connectivity in South Africa, offering a variety of services tailored to meet business needs

Telecommunications 馃嚳馃嚘 Highveld 596 2010
57
Standard Bank Corporate and Investment Bankingcorporateandinvestment.standardbank.com

A real economy bank in Africa with over 160 years of experience, providing insights to unlock opportunities and mitigate risks for clients

Financial Services 馃嚳馃嚘 Johannesburg 578 n/a
58
Afrihostafrihost.com

This company provides web hosting and IT services, prioritizing client and employee satisfaction over profit, founded by three best friends

Telecommunications 馃嚳馃嚘 Johannesburg 561 2000
59
Bombela Operating Company (PTY) LTDbombelaop.com

Operating and maintaining the Gautrain system, a new railway network in Johannesburg with 10 stations and bus feeder services, under contractual agreement

Rail Transportation 馃嚳馃嚘 Johannesburg 519 n/a
60
ENGIE South Africaengie-africa.com

A company focused on accelerating the shift to a carbon neutral economy in Africa through energy efficiency and environmentally friendly solutions

Renewable Energy Power Generation 馃嚳馃嚘 Woodmead 197 2016
61
BTE Renewables has been acquired by ENGIE Africaengie-africa.com

African company developing and operating utility-scale wind and solar projects with a focus on sustainability, community engagement, and high standards

Utilities 馃嚳馃嚘 Johannesburg 46 2003

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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 Oct 24, 2026.

More company lists in Gauteng

The same list elsewhere in South Africa