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List of critical infrastructure operators in Vienna

Tamtam tracks 58 critical infrastructure operators headquartered in Vienna. This list ranks all of them by number of employees on LinkedIn, led by Vienna Insurance Group (VIG), Wiener Stadtwerke GmbH and A1 Telekom Austria Group. Their median headcount is 1,136. Half of them were founded in 1956 or later.

🇦🇹 Vienna58 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Vienna Insurance Group (VIG)group.vig

Leading insurance group in Central and Eastern Europe with over 50 companies, serving 33 million customers and strong regional presence.

Insurance 🇦🇹 Vienna 18,276 n/a
2
Wiener Stadtwerke GmbHwienerstadtwerke.at

The company group in Vienna ensures reliable energy, mobility, and public services while actively pursuing a sustainable climate transition with innovative solutions

Utilities 🇦🇹 Vienna 15,000 n/a
3
A1 Telekom Austria Groupa1.group

Leading digital services and communications provider in Central and Eastern Europe, enabling connectivity, digital business, and lifestyle for over 24 million users.

Telecommunications 🇦🇹 Vienna 12,320 1887
4
UNIQA Insurance Groupuniqagroup.com

Insurance provider for private and corporate clients across Austria and Central and Eastern Europe, offering risk protection and community support.

Insurance 🇦🇹 Vienna 8,256 n/a
5
ÖBBholding.oebb.at

With 13 million daily passengers and 1,300 freight trains, ÖBB is a leading Austrian employer with over 42,000 employees and 2,000 apprentices

Rail Transportation 🇦🇹 Vienna 7,419 n/a
6
OMVomv.com

A leading sustainable fuels, chemicals, and materials company focusing on circular economy solutions, transitioning to low-carbon businesses to achieve net zero emissions by 2050

Utilities 🇦🇹 Vienna 6,877 1956
7
Erste Grouperstegroup.com

A leading financial institute in Central and Eastern Europe, providing banking services to millions of customers, promoting career growth and innovation

Banking 🇦🇹 Vienna 5,859 n/a
8
Raiffeisen Bank International AGrbinternational.com

A leading banking group in Austria and CEE, offering a variety of financial services through subsidiary banks and other providers to millions of customers

Banking 🇦🇹 Vienna 5,107 2010
9
Raiffeisen Bankengrupperaiffeisen.at

A leading banking group with regional central banks and independent branches, employing 24,700 people in 1,955 locations

Banking 🇦🇹 Vienna 4,377 n/a
10
City of Viennajobs.wien.gv.at

The Vienna City Administration is the largest employer in Vienna, providing social services, infrastructure, and essential utilities with a focus on employee development and equality

Executive Offices 🇦🇹 Vienna 4,260 n/a
11
A1 Telekom Austria AGjobs.a1.com

Provider of internet, voice, TV, and IT services in Austria, with a focus on sustainability and a range of digital solutions Part of a larger telecommunications group in Central and Eastern Europe

Telecommunications 🇦🇹 Vienna 4,226 1881
12
Austrian Airlinesaustrian.com

Leading Austrian airline operating worldwide routes from Vienna, focusing on high service quality, environmental responsibility, and exceptional passenger experience.

Airlines and Aviation 🇦🇹 Vienna 3,206 1957
13
Österreichische Post AGpost.at

An international post, logistics, and service conglomerate in Austria, with a wide reach in transportation, delivery services, e-commerce, and digital solutions

Transportation, Logistics, Supply Chain and Storage 🇦🇹 Vienna 3,080 n/a
14
Erste Bank und Sparkassesparkasse.at

A leading financial institute in Central and Eastern Europe, offering banking services, financing for families, support for entrepreneurs, and creating innovative products

Banking 🇦🇹 Vienna 2,970 n/a
15
UniCredit Bank Austria AGbankaustria.at

A leading Austrian bank within the UniCredit network, focused on empowering communities and unlocking potential across Europe with a common culture of integrity and ownership

Banking 🇦🇹 Vienna 2,684 n/a
16
Wiener Städtische Versicherungwienerstaedtische.at

A leading insurance company in Austria, part of VIENNA INSURANCE GROUP, offering reliable and innovative insurance products with a focus on customer satisfaction for over 190 years

Insurance 🇦🇹 Vienna 2,250 n/a
17
BAWAG Groupbawaggroup.com

Provides savings, payment, lending, leasing, investment, factoring, insurance products across multiple countries for retail and corporate customers.

Banking 🇦🇹 Vienna 1,979 1883
18
Wiener Linienwienerlinien.at

Providing climate-friendly public transportation services in Vienna, ensuring quality, innovation, and diverse roles for efficient urban mobility.

Urban Transit Services 🇦🇹 Vienna 1,973 n/a
19
Österreichisches Rotes Kreuzroteskreuz.at

The organization provides humanitarian aid through services such as emergency response, blood donation, health, social services, disaster relief, and international cooperation

Non-profit Organizations 🇦🇹 Vienna 1,668 n/a
20
Addiko Bank AGaddiko.com

A consumer and SME specialist banking group in CSEE, offering unsecured personal loans, working capital loans, and payment services

Banking 🇦🇹 Vienna 1,634 n/a
21
Wien Energie GmbHwienenergie.at

Largest regional energy provider, supplying two million people with eco-friendly power, cooling, heating, electromobility, and telecommunications. Invests in renewables and electromobility.

Utilities 🇦🇹 Vienna 1,557 2001
22
Magenta Telekommagenta.at

Leading Austrian provider of internet, mobile, entertainment, and business solutions with advanced broadband and digital technologies for customers.

Telecommunications 🇦🇹 Vienna 1,338 1996
23
VERBUNDverbund.com

A leading European utility company focused on renewable energy, primarily hydroelectricity, with operations in electricity generation, transmission, trading, and sales

Utilities 🇦🇹 Vienna 1,336 1947
24
Wiener Gesundheitsverbundkarriere.gesundheitsverbund.at

A healthcare provider with 30,000 employees offering 24/7 care for patients and residents in Vienna, with 8 hospitals, 9 nursing homes, and a therapy center

Hospitals and Health Care 🇦🇹 Vienna 1,325 n/a
25
Rail Cargo Grouprailcargo.com

Leading European rail freight provider operating 448,000 trains annually, connecting 18 countries with efficient end-to-end logistics services.

Rail Transportation 🇦🇹 Vienna 1,312 1923
26
Raiffeisenraiffeisen.at

Cooperative banking group emphasizing community strength, mutual support, and collective power to achieve financial and social goals together.

Financial Services 🇦🇹 Vienna 1,263 1927
27
Volksbankvolksbank.at

A trusted bank in Austria serving entrepreneurs and individuals, focusing on trust, sustainability, and regional support for over 170 years

Banking 🇦🇹 Vienna 1,236 n/a
28
Pensionsversicherungpv.at

The largest pension insurance provider in Austria, with 6,500 employees serving 35 million insured individuals and paying out over 19 million pensions nationwide

Government Administration 🇦🇹 Vienna 1,211 1906
29
AUVA - Allgemeine Unfallversicherungsanstaltauva.at

This company provides social insurance for occupational risks, offering prevention, medical care, treatment, rehabilitation, compensation, and research for employees and students

Public Health 🇦🇹 Vienna 1,136 1889
30
Universitätsklinikum AKH Wienakhwien.at

The company is the largest hospital in Austria, treating around 60,000 inpatients and over 11 million outpatients annually with a diverse staff

Hospitals and Health Care 🇦🇹 Vienna 1,080 1693
31
Drei Österreichdrei.at

A leading mobile provider in Austria, offering innovative digital solutions like fast broadband internet, mobile TV, and music services with extensive customer support

Telecommunications 🇦🇹 Vienna 946 2003
32
Österreichische Gesundheitskasseoegk.at

The largest social health insurance in Austria, providing equal access to healthcare for 76 million insured individuals through various services and a respectful work environment

Government Administration 🇦🇹 Vienna 935 2020
33
Raiffeisenlandesbank Niederösterreich-Wien AGraiffeisen.at

A modern regional and commercial bank in Eastern Austria focused on building long-term customer relationships, following Raiffeisen's principles and supporting social causes and sustainability

Banking 🇦🇹 Vienna 895 1898
34
ASFINAGasfinag.at

The company is a reliable, innovative, and sustainable mobility partner in Austria, investing in eco-friendly solutions for generations to come They provide safe highways and digital services

Highway, Street, and Bridge Construction 🇦🇹 Vienna 892 1982
35
Iran Air ATiranair.at

Flag carrier of Iran offering direct flights between Vienna and Tehran since 1974 Book tickets online Follow on social media for updates

Airlines and Aviation 🇦🇹 Vienna 826 n/a
36
Oesterreichische Nationalbankoenb.at

The central bank of Austria within the Eurosystem, contributing to monetary policy, financial stability, cash supply, reserve asset management, economic analysis, and payment system oversight

Banking 🇦🇹 Vienna 775 1816
37
Generali Austriagenerali.at

A leading insurance company with a focus on motor vehicle insurance, sustainable growth, international presence, innovation, employee trust, and continuous learning and development opportunities

Insurance 🇦🇹 Vienna 730 1832
38
Fonds Soziales Wien (FSW)fsw.at

A social fund in Vienna with 2,500 employees and a budget of €225 billion, providing support to over 142,000 individuals annually They offer services for various needs

Individual and Family Services 🇦🇹 Vienna 700 2001
39
Wiener Netze GmbHwienernetze.at

A key infrastructure operator in Vienna, specializing in electricity, gas, district heating, and data services, leading the way towards a sustainable future

Utilities 🇦🇹 Vienna 625 n/a
40
APG Austrian Power Grid AGapg.at

The company is an independent electricity transmission system operator in Austria, responsible for integrating renewable energy and ensuring energy security at market prices

Utilities 🇦🇹 Vienna 624 n/a
41
DONAU Versicherung AG Vienna Insurance Groupdonauversicherung.at

An Austrian company with over 150 years of experience, providing insurance services to protect what matters most to people across the country

Insurance 🇦🇹 Vienna 622 n/a
42
Helvetia Insurance Austriahelvetia.com

Offering top Swiss quality individual insurance policies in Austria for over 160 years to meet customer demands

Insurance 🇦🇹 Vienna 365 1858
43
Oesterreichische Kontrollbank AGoekb.at

As a central financial services provider, supports the Austrian economy with diverse services. Provides essential financial infrastructure and expertise for businesses.

Banking 🇦🇹 Vienna 354 1946
44
Allianz Österreichallianz.at

A leading financial service provider in Austria offering insurance, retirement planning, and wealth management solutions to over 115 million customers since 1860

Insurance 🇦🇹 Vienna 347 1860
45
Kommunalkreditkommunalkredit.at

Financing essential European infrastructure projects in energy, environment, transport, digitalization, social infrastructure, and natural resources with tailored solutions.

Banking 🇦🇹 Vienna 291 1959
46
Sozialversicherung der Selbständigensvs.at

The SVS provides social security, health and pension benefits, and digital services for self-employed individuals in Austria through a self-managed organization

Insurance 🇦🇹 Vienna 278 n/a
47
Gutmanngutmann.at

A leading private banking and asset management firm in Austria, providing tailored investment advice, fund solutions, and managing a substantial investment fund volume

Banking 🇦🇹 Vienna 242 1922
48
R V Allgemeine Versicherung AGruv.at

Insurance company offering a variety of insurance products, located in Wien, Germany

Insurance 🇦🇹 Vienna 238 n/a
49
FCC Environment CEEfcc-group.eu

Provides waste collection, treatment, recycling, and recovery services across Central and Eastern Europe to promote sustainable urban living.

Environmental Services 🇦🇹 Vienna 163 1988
50
PSA Payment Services Austria GmbHpsa.at

Management of ATM network, processing account transfers, providing card and identity products, and developing innovative payment solutions for banks.

Financial Services 🇦🇹 Vienna 149 2012
51
VBV-Gruppevbv.at

Market leader in corporate pension solutions in Austria, managing over 11 billion euros for 37 million beneficiaries, known for quality, innovation, and sustainability

Financial Services 🇦🇹 Vienna 98 n/a
52
SVC designing e-healthsvc.co.at

The company focuses on developing and implementing IT projects in the Austrian healthcare system, including e-card, ELGA, e-Medication, and social insurance internet portals

Software Development 🇦🇹 Vienna 96 n/a
53
Intermarket Bank AG - Factoring, Supply Chain Finance und Liquidityintermarket.at

An Austrian factoring bank offering receivables financing services, part of Erste Group Bank AG, providing international solutions for businesses in Austria and the CEE region

Banking 🇦🇹 Vienna 95 1971
54
WIENER PRIVATBANK SEwienerprivatbank.com

A banking company based in Vienna, Austria specializing in providing financial services to clients

Banking 🇦🇹 Vienna 62 2005
55
VakıfBank International AGvakifbank.at

A financial institution based in Vienna with branch network in Austria and Germany, providing various banking services to customers

Banking 🇦🇹 Vienna 57 1999
56
ICBC Austria Bank GmbHicbc-at.com

The company is the largest commercial bank in China, with a global presence and a strategic focus on expanding its operations in Austria

Financial Services 🇦🇹 Vienna 28 2018
57
FactorBank Aktiengesellschaftfactorbank.com

Increase company profits by selling short-term receivables to FactorBank AG for quicker access to funds, with financing tailored to turnover and advantageous discount benefits

Banking 🇦🇹 Vienna 14 1965
58
Raiffeisen Immobilien Kapitalanlage-Ges.mbHraiffeisenfonds.at

Raiffeisen Capital Management is a leading asset management company in Austria, offering innovative fund solutions for private and institutional investors They manage assets worth nearly 32 billion euros

Investment Banking 🇦🇹 Vienna 10 n/a

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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 Vienna

The same list elsewhere in Austria