Tamtam Start free

List of critical infrastructure operators in Community of Madrid

Tamtam tracks 169 critical infrastructure operators headquartered in Community of Madrid. This list ranks the 100 largest by number of employees on LinkedIn, led by Santander, Telefónica and FCC. Their median headcount is 1,772. Half of them were founded in 1971 or later. The most common headquarters are Madrid (85) and Alcobendas (5).

🇪🇸 Community of Madrid100 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
Santandersantander.com

Leading global bank offering retail, corporate, investment banking, wealth management, insurance, and payment services to diverse clients worldwide.

Banking 🇪🇸 Boadilla del Monte 129,701 n/a
2
Telefónicatelefonica.com

Leading global telecommunications company providing advanced infrastructure, innovative digital and data services, focusing on secure, cutting-edge technology and social impact.

Telecommunications 🇪🇸 Madrid 121,569 n/a
3
FCCfcc.es

Global citizen services company with 100+ years of experience in environmental services, water, and infrastructure sectors, operating in 34 countries

Environmental Services 🇪🇸 Madrid 71,000 1900
4
Quirónsaludquironsalud.com

Leader in healthcare in Spain and Europe with over 50,000 professionals and 59 hospitals, focusing on medical research, education, and cutting-edge technology

Wellness and Fitness Services 🇪🇸 Madrid 50,000 1893
5
Mapfremapfre.com

Provides insurance, financial, and service solutions globally, focusing on innovation, trust, inclusion, and sustainability for individuals and businesses for over 90 years.

Insurance 🇪🇸 Majadahonda 39,064 1933
6
Grupo Cobragrupocobra.com

Global company with 80 years of experience in industrial engineering and specialized services, present in over 45 countries, focusing on renewable energy and various engineering sectors

Utilities 🇪🇸 Madrid 36,000 1944
7
ACCIONAacciona.com

The company specializes in developing regenerative infrastructure with a focus on sustainability, leading the transition to a low-carbon economy with a positive impact on people and the planet

Utilities 🇪🇸 Madrid 33,828 n/a
8
repsolrepsol.com

A leading player in the oil and gas industry, involved in exploration, production, transformation, development, and marketing of efficient, sustainable energy solutions globally

Oil and Gas 🇪🇸 Madrid 26,030 n/a
9
PreZero Españaprezero.es

The company provides environmentally friendly solutions for waste management and circular economy, serving over 980 municipalities in Spain and Portugal

Environmental Services 🇪🇸 Madrid 14,600 2021
10
Correoscorreos.es

The company is a leader in physical, digital, and parcel communications, offering quality services in the ecommerce value chain, reaching millions of homes and businesses annually

Utilities 🇪🇸 Madrid 13,939 1716
11
Iberiaiberia.com

Spain's number-one airline group and Europe-Latin America market leader. Part of IAG Group and Oneworld Alliance, offers best connections to 700 destinations worldwide.

Airlines and Aviation 🇪🇸 Madrid 11,107 1927
12
Elecnor Groupgrupoelecnor.com

Global corporation specializing in engineering, construction, sustainable projects, infrastructure investments, renewable energy, asset management, and energy transmission across 50 countries.

Construction 🇪🇸 Madrid 10,383 1958
13
Sanitascorporativo.sanitas.es

The company is dedicated to promoting healthier and happier lives through an integrated healthcare model, including insurance, hospitals, rehabilitation centers, and dental clinics

Wellness and Fitness Services 🇪🇸 Madrid 10,198 n/a
14
Endesaendesa.com

Leaders in electricity and natural gas sector. Providing services to millions of clients. Core business is production, transportation, distribution and commercialization of electric power.

Utilities 🇪🇸 Madrid 9,800 1944
15
DIGI SPAIN TELECOMdigimobil.es

A mobile virtual operator in Spain, offering affordable rates for calls, internet, and roaming Backed by a strong network and customer support in multiple languages

Telecommunications 🇪🇸 Alcobendas 9,000 2006
16
SACYRsacyr.com

A global group specializing in infrastructure, services, and industrial projects with a focus on sustainability, profitability, and improving daily lives

Civil Engineering 🇪🇸 Madrid 8,854 n/a
17
SEURseur.com

Leading urgent transport provider in Spain, specializing in international deliveries, ecommerce, and temperature-controlled shipments Committed to sustainability and innovation for a better planet

Truck Transportation 🇪🇸 Madrid 8,100 1942
18
Moevemoeveglobal.com

Production of sustainable energies based on green molecules like green hydrogen and 2G biofuels, plus ultrafast electric mobility solutions.

Oil and Gas 🇪🇸 Madrid 7,527 n/a
19
Bankinterbankinter.com

A leading Spanish online banking brand focused on quality customer service and innovation, offering a wide range of financial products and services

Banking 🇪🇸 Madrid 6,427 1965
20
ADIFadif.es

Adif is a public entity that manages and develops railway infrastructure in Spain to promote safe, efficient, and sustainable rail transport

Rail Transportation 🇪🇸 Madrid 6,038 2005
21
CEPSAcepsa.com

A leading international entity specializing in sustainable mobility and energy, with expertise in chemicals and a focus on reducing carbon emissions

Oil and Gas 🇪🇸 Madrid 5,553 n/a
22
Aenaaena.es

A leading airport operator offering efficient, quality services in 46 airports in Spain and 16 internationally, prioritizing customer experience and sustainability

Airlines and Aviation 🇪🇸 Madrid 5,374 1991
23
Ocasoocaso.es

An independent Spanish insurance company founded in 1920, focusing on tradition, commitment, and customer satisfaction through efficient service and long-term employee development

Insurance 🇪🇸 Madrid 4,792 1920
24
Naturgynaturgy.com

A multinational energy company with a 180-year history, focusing on renewables, renewable gas, energy efficiency, and circular economy to create value

Electric Power Generation 🇪🇸 Madrid 4,696 1843
25
Urbaserurbaser.com

A global sustainability-focused company providing environmental management services to over 50 million people in 20 countries through a large network of employees and subsidiaries

Environmental Services 🇪🇸 Madrid 4,472 n/a
26
Santander Corporate & Investment Bankingsantandercib.com

A global banking division specializing in corporate and investment services, offering tailored products to clients in Europe, Latin America, US, and Asia

Financial Services 🇪🇸 Madrid 4,079 n/a
27
FREMAPfremap.es

We are a collaborator entity managing and protecting work-related risks for companies, providing comprehensive services including prevention, healthcare, training, and social support

Hospitals and Health Care 🇪🇸 Majadahonda 4,000 1933
28
HM Hospitaleshmhospitales.com

Private healthcare group with 54 centers offering specialized hospitals, clinics, and integrated care focused on quality, innovation, and patient wellbeing.

Wellness and Fitness Services 🇪🇸 Madrid 3,803 1989
29
Bankiacaixabank.com

Leading Spanish financial institution in retail, business, corporate finance, capital markets, asset management, and private banking across six autonomous communities.

Banking 🇪🇸 Madrid 3,778 2010
30
Vithas

Operates 22 hospitals and 39 medical centers across Spain, providing accredited, high-quality healthcare services to over five million patients annually.

Hospitals and Health Care 🇪🇸 Madrid 3,710 2012
31
santalucía segurossantalucia.es

Providing insurance and related services through multiple companies, focusing on customer care, innovation, and employee well-being across Spain.

Insurance 🇪🇸 Madrid 3,582 1922
32
CAJAMARgrupocooperativocajamar.es

Leading Spanish credit cooperative with over 14 million members, 39 million clients, 1,200+ branches, and 5,000 employees, part of Spain's largest cooperative credit group

Banking 🇪🇸 Madrid 3,457 1946
33
CASERcaser.es

An experienced insurance group offering a wide range of solutions in Home, Auto, Health, and Life insurance, with a strong focus on customer service and professionalism

Insurance 🇪🇸 Madrid 3,263 1942
34
Hospital Universitario La Pazcomunidad.madrid

A public hospital in Madrid that offers specialized healthcare services to patients from Spain and other countries, with a strong reputation in the healthcare industry

Hospitals and Health Care 🇪🇸 Madrid 3,225 1964
35
Hospital Gregorio Marañónhggm.es

A public hospital in Madrid known for highly trained professionals, teaching and research, technological advancements, and national/international specialty care

Medical Practices 🇪🇸 Madrid 3,146 n/a
36
Fundación Hospitalariasfundacionhospitalarias.org

Non-profit institution providing specialized care, assistance, and social reintegration for individuals with mental illness, intellectual disabilities, and other conditions worldwide

Hospitals and Health Care 🇪🇸 Madrid 3,112 1881
37
BBVA en Españabbva.es

A multinational financial group offering services to 53 million clients in over 30 countries, prioritizing a better future for people through education and social entrepreneurship

Banking 🇪🇸 Madrid 2,963 n/a
38
Banco de Españabde.es

National central bank and banking supervisor, managing monetary policy, currency issuance, payment systems, and financial system stability in Spain.

Banking 🇪🇸 Madrid 2,585 1782
39
Banco Popularbancosantander.es

One of the top five banking groups in Spain, focused on retail and commercial banking with a strong customer-centric approach, high credit volume, and international presence

Banking 🇪🇸 Madrid 2,560 1926
40
Santander Españabancosantander.es

Providing innovative banking products and solutions, building lasting customer relationships, supporting personal and business project development with expertise and resources.

Banking 🇪🇸 Madrid 2,386 n/a
41
Aqualiaaqualia.com

Aqualia provides water management services to municipalities and private entities in 18 countries, serving 452 million people with sustainable solutions

Environmental Services 🇪🇸 Madrid 2,316 n/a
42
Mutua Madrileñamutua.es

A leading insurance company with over 169 million clients, ranking first in various insurance categories and expanding internationally Also active in asset management and real estate

Insurance 🇪🇸 Madrid 2,302 1930
43
Alsaalsa.es

With over a century of experience, the company is the leading organization in Spain's road passenger transport sector, offering a wide range of bus services

Ground Passenger Transportation 🇪🇸 Madrid 2,232 1923
44
SegurCaixa Adeslassegurcaixaadeslas.es

A leading Spanish non-life insurance company specializing in health insurance and other sectors Known for its extensive network of medical facilities and high-quality service

Insurance 🇪🇸 Madrid 2,229 n/a
45
Logistalogista.com

A leading logistics operator in Europe specializing in distribution to local channels, serving nearly 200,000 points of sale with a focus on efficiency and customer needs

Transportation, Logistics, Supply Chain and Storage 🇪🇸 Leganés 2,145 1999
46
FCC Medio Ambientefccma.com

A global leader in environmental services, offering waste collection, recycling, energy recovery, cleaning, maintenance, and industrial waste treatment solutions worldwide

Environmental Services 🇪🇸 Madrid 2,061 1911
47
Linea Directa Aseguradoralineadirectaaseguradora.com

Offers direct insurance products including home, vehicle, health, and pet coverage with a focus on digital innovation and customer proximity.

Insurance 🇪🇸 Tres Cantos 1,981 1995
48
Allianz Españaallianz.es

Providing life and non-life insurance products, investment solutions, and client services through agents, brokers, and banking networks in Spain.

Insurance 🇪🇸 Madrid 1,952 n/a
49
ACCIONA Energíaacciona-energia.com

Global leader in renewable energy solutions, focused on decarbonizing the economy through sustainable energy practices to combat climate change and promote community well-being

Renewable Energy Power Generation 🇪🇸 Madrid 1,875 n/a
50
Grupo MASMOVILgrupomasmovil.com

An Iberian Telecom operator providing fixed, mobile, broadband Internet services, green energy, telemedicine, security, with a focus on customer satisfaction and sustainability

Telecommunications 🇪🇸 Alcobendas 1,772 2006
51
ENAIREenaire.es

A company under the Ministry of Transport in Spain managing air navigation services at airports and en-route control centers, part of international aviation alliances

Airlines and Aviation 🇪🇸 Madrid 1,768 1990
52
Metro de Madrid, S.A.metromadrid.es

Management and operation of Madrid's extensive metro network, providing high-quality, innovative, and accessible public transportation services daily.

Urban Transit Services 🇪🇸 Madrid 1,767 1919
53
Exolumexolum.com

A European leader in liquid product logistics, specializing in innovative solutions for biofuels, hydrogen, and circular economy to shape the future

Transportation, Logistics, Supply Chain and Storage 🇪🇸 Madrid 1,650 1927
54
Avanzaavanzagrupo.com

Leading operator in urban and intercity public transport services in Spain Focus on sustainable mobility solutions and expansion through acquisitions and public contracts

Ground Passenger Transportation 🇪🇸 Madrid 1,593 1885
55
Hospital Universitario Ramón y Cajal

A medical practice company located in Madrid, Spain, specializing in providing healthcare services at Hospital Universitario Ramón y Cajal

Medical Practices 🇪🇸 Madrid 1,548 n/a
56
Orange Españaorange.es

Provides mobile, fixed telephony, broadband internet, and ADSL TV services to nearly 13 million customers across Spain.

Telecommunications 🇪🇸 Pozuelo de Alarcón 1,526 1998
57
ING España&Portugaling.es

ING Spain & Portugal is a digital bank focusing on simplicity, transparency, innovation, and sustainability to make banking easier for 4 million customers

Banking 🇪🇸 Madrid 1,509 n/a
58
Canal de Isabel IIcanaldeisabelsegunda.es

A public company in Madrid managing the water cycle, ensuring supply and quality, while contributing to environmental protection and using advanced technology

Utilities 🇪🇸 Madrid 1,475 1851
59
Hospital Universitario Puerta De Hierro Majadahonda

A medical practice company located in Spain, offering services at Hospital Universitario Puerta de Hierro Majadahonda on CALLE MANUEL DE FALLA 1

Medical Practices 🇪🇸 Majadahonda 1,456 n/a
60
EDP Renewablesedpr.com

Global renewable energy company specializing in wind power generation with extensive international presence and significant operating capacity.

Renewable Energy Power Generation 🇪🇸 Madrid 1,449 n/a
61
Openbankopenbank.us

Online bank offering complete, convenient, and fast banking services through phone and internet Accessible anytime via smartphone or tablet, with free debit card and access to Santander ATMs

Banking 🇪🇸 Madrid 1,422 1995
62
UFINETufinet.com

A Latin American carrier of carriers providing high-quality telecom solutions with a carrier-grade network, customer-oriented services, and a wide service portfolio

Telecommunications 🇪🇸 Madrid 1,394 1998
63
ASISAasisa.es

Leading Spanish health insurance company owned by a medical cooperative, reinvesting profits in healthcare services, offering comprehensive coverage to over 1.8 million insured.

Insurance 🇪🇸 Madrid 1,363 1971
64
Eurofins Españaeurofins-megalab.com

Leader in clinical diagnostic testing in Spain with over 35 years of experience Offers over 5,000 different tests, serving 70+ hospitals nationwide

Medical and Diagnostic Laboratories 🇪🇸 Madrid 1,313 1988
65
Sanitas Hospitalessanitas.es

A Madrid-based insurance company providing hospital services, located at CALLE RIBERA DEL LOIRA 52, MADRID, Spain

Hospitals and Health Care 🇪🇸 Madrid 1,309 n/a
66
Ontime Logística Integralontime.es

Comprehensive logistics services including parcel, pallet, full loads, dedicated transport, industrial, pharma, sustainable urban delivery, and multimodal transport across Iberia.

Transportation, Logistics, Supply Chain and Storage 🇪🇸 Madrid 1,306 1991
67
Red Eléctricaree.es

A pioneering company dedicated to electricity transmission and system operation, leading the way in separating transportation from generation and distribution activities

Utilities 🇪🇸 Alcobendas 1,300 1985
68
EMT Madridemtmadrid.es

Management of urban bus, public parking, vehicle removal, public bike service BiciMAD, and Madrid cable car operations.

Utilities 🇪🇸 Madrid 1,259 1947
69
Enagásenagas.es

The company is the Technical Manager of the Spanish Gas System, ensuring competition and security, with international presence in Mexico and Chile

Oil and Gas 🇪🇸 Madrid 1,239 1972
70
LogiRAILlogirail.com

LogiRAIL provides global logistics, technology, and handling services for the railway sector in Spain They prioritize agility, efficiency, safety, and customer value

Utilities 🇪🇸 Madrid 1,215 n/a
71
Hospital Universitario San Rafaelhospitalsanrafael.es

The Hospital Universitario San Rafael provides specialized medical and surgical care to patients, focusing on holistic treatment and education in healthcare sciences

Hospitals and Health Care 🇪🇸 Madrid 1,004 1892
72
Santander Private Bankingsantanderprivatebanking.com

Offering a multi-local approach, we provide a perfect blend of local expertise and global capabilities to serve clients in Europe and the Americas

Financial Services 🇪🇸 Boadilla del Monte 998 n/a
73
San Juan de Dios Españasjd.es

Official account of a healthcare organization in Spain dedicated to promoting health and providing care to the vulnerable through a network of facilities and professionals

Health and Human Services 🇪🇸 Madrid 987 1572
74
South Europe Ground Services

Provides ground and passenger assistance services to IAG Group airlines and third-party companies at 38 airports in Spain.

Airlines and Aviation 🇪🇸 Madrid 976 2024
75
BBVA Asset Management en Españabbvaassetmanagement.com

A global asset management unit specializing in investment funds and pension management, known for innovation, excellence, and regional expertise

Investment Management 🇪🇸 Madrid 953 1985
76
CASER RESIDENCIALcaseresidencial.es

A private sociosanitary services provider specializing in elderly care, offering residential centers, day centers, assisted living, home care, and telecare nationwide

Hospitals and Health Care 🇪🇸 Madrid 934 n/a
77
Hospital Universitario de Torrejónhospitaldetorrejon.es

A fully computerized hospital offering excellent healthcare services to all Madrid residents with cutting-edge technology and a dedicated medical team focused on patient care

Hospitals and Health Care 🇪🇸 Torrejón de Ardoz 918 2011
78
VidaCaixavidacaixa.es

A leading enterprise in the social welfare sector, prioritizing Quality, Trust, and Social Commitment for customers, employees, shareholders, society, and the environment

Insurance 🇪🇸 Madrid 884 1987
79
A&Gayg.es

A&G is a wealth management firm founded in 1987, providing exclusive services to private clients and institutions, with over 126 billion EUR in assets under management

Financial Services 🇪🇸 Madrid 868 1987
80
Wamos Airwamosair.com

Global aviation company operating internationally since 2003

Airlines and Aviation 🇪🇸 Madrid 861 2003
81
Pelayo Mutua de Segurospelayo.com

A fixed premium insurance mutual company in Spain offering a wide range of insurance products with a strong financial position and commitment to social programs

Insurance 🇪🇸 Madrid 838 1933
82
Yoigoyoigo.com

A telecommunications company in Spain, part of MásMóvil Group, offering 4G services with coverage of 85% population via own network and partnerships with other operators

Telecommunications 🇪🇸 Alcobendas 830 2006
83
Avatel Telecomavatel.es

A leading Spanish telecommunications provider offering fiber optic, fixed and mobile telephony, and television services Driving technological development and connectivity nationwide

Telecommunications 🇪🇸 Madrid 819 2011
84
EDP Españaedpenergia.es

Global company leading the energy transition with a goal to be 100% green by 2030 Produces over 75% renewable energy and supports a sustainable future

Utilities 🇪🇸 Madrid 805 n/a
85
Viamed Saludviamedsalud.com

Viamed Salud group operates a network of hospitals, medical imaging centers, and outpatient facilities, providing quality healthcare with modern technology and a patient-centered approach

Wellness and Fitness Services 🇪🇸 Alcobendas 796 2004
86
Liberbankunicajabanco.es

We have merged with Unicaja Banco Stay up to date with news from the entity by following us @UnicajaBanco

Banking 🇪🇸 Madrid 794 n/a
87
Redsys Servicios de Procesamientoredsys.es

Specializing in digital payment solutions with expertise in EMV, contactless, tokenization, wallets, e-commerce, cybersecurity, certification, chargebacks, healthcare, telemedicine, mobility, and transportation services

Financial Services 🇪🇸 Madrid 789 n/a
88
Vodafone Españavodafone.es

The company believes in using technology and connectivity to improve lives and create a more sustainable society, aiming to impact one billion lives positively by 2025

Telecommunications 🇪🇸 Madrid 780 n/a
89
Grupo Hospitalario HLAgrupohla.com

A leading hospital group in Spain providing high-quality healthcare through a network of 18 hospitals and 38 multidisciplinary medical centers

Wellness and Fitness Services 🇪🇸 Madrid 779 1969
90
Babcock Españababcockinternational.com

Leader in emergency air services & aircraft maintenance Specializing in medical emergencies, civil protection, search & rescue, firefighting, and training Operating worldwide with 400 aircraft fleet

Airlines and Aviation 🇪🇸 Madrid 753 1983
91
Noatumnoatum.com

A leading multinational group specializing in maritime, global logistics, and port operations with a strong international presence and strategic vision for the future

Transportation, Logistics, Supply Chain and Storage 🇪🇸 Madrid Coslada 732 1963
92
Renta 4r4.com

A leading independent financial services company in Spain and Latin America, offering wealth management, asset management, brokerage, and corporate finance advisory services

Banking 🇪🇸 Madrid 730 1986
93
Telefónica Españajobs.telefonica.com

A tech-driven organization in Spain focusing on trust, sustainability, and team well-being, connecting talent through innovative work models #ConnectingTalent

Telecommunications 🇪🇸 Madrid 715 1929
94
Solunionsolunion.com

A team of professionals with extensive experience in credit and surety insurance, providing solutions to drive secure business growth and projects

Insurance 🇪🇸 Madrid 713 2013
95
Grenergygrenergy.eu

A project developer and Independent Power Producer specializing in solar and wind energy plants' development, construction, operation, maintenance, and sale

Renewable Energy Power Generation 🇪🇸 Madrid 713 2007
96
Cecabankcecabank.es

Wholesale Spanish bank specializing in securities services, payments, treasury management, and digital solutions, offering tailored financial proposals to help customers achieve business objectives internationally

Banking 🇪🇸 Madrid 685 2012
97
IGNISignis.es

Global renewable energy company focused on clean energy projects, thermal power management, energy management, EPC, and O&M services.

Electric Power Generation 🇪🇸 Madrid 675 2015
98
X-ELIOx-elio.com

Develops renewable energy projects, driving businesses and communities toward a sustainable future, with a global, responsible business model for the planet and inhabitants.

Solar Electric Power Generation 🇪🇸 Madrid 672 2005
99
BME | Bolsas y Mercados Españolesbolsasymercados.es

A company managing financial markets infrastructures in Spain, owned by Grupo SIX, offering global trading services, secure financial information, and payment solutions worldwide

Financial Services 🇪🇸 Madrid 665 n/a
100
ENGIE Españaengie.es

Production of renewable energy, energy management, and industrial solutions supporting clients' transition to carbon neutrality and energy efficiency.

Renewable Energy Semiconductor Manufacturing 🇪🇸 Madrid 659 n/a

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.

Build your own list, free

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 Community of Madrid

The same list elsewhere in Spain