| # | Company | Employees |
|---|---|---|
| 1 | 130,572 | |
| 2 |
Santandersantander.com
Leading global bank offering retail, corporate, investment banking, wealth management, insurance, and payment services to diverse clients worldwide. |
129,701 |
| 3 |
Telefónicatelefonica.com
Leading global telecommunications company providing advanced infrastructure, innovative digital and data services, focusing on secure, cutting-edge technology and social impact. |
121,569 |
| 4 | 71,000 | |
| 5 |
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 |
50,000 |
| 6 |
Iberdrolaiberdrola.com
A global leader in renewable energy and electricity, focusing on sustainable and efficient services for millions worldwide with investments in clean energy and digital transformation |
45,000 |
| 7 |
Mapfremapfre.com
Provides insurance, financial, and service solutions globally, focusing on innovation, trust, inclusion, and sustainability for individuals and businesses for over 90 years. |
39,064 |
| 8 |
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 |
36,000 |
| 9 |
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 |
33,828 |
| 10 |
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 |
26,030 |
| 11 |
CaixaBankcaixabank.es
A leading financial group in Spain offering banking, insurance, and investment services with a focus on quality, innovation, and sustainable economic growth |
21,535 |
| 12 |
PreZero Españaprezero.es
The company provides environmentally friendly solutions for waste management and circular economy, serving over 980 municipalities in Spain and Portugal |
14,600 |
| 13 |
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 |
13,939 |
| 14 |
Banco Sabadellsabadellcareers.com
Comprehensive financial services group offering personal and business banking with modern technology, professional staff, and a customer-focused multibrand approach. |
11,430 |
| 15 |
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. |
11,107 |
| 16 |
Elecnor Groupgrupoelecnor.com
Global corporation specializing in engineering, construction, sustainable projects, infrastructure investments, renewable energy, asset management, and energy transmission across 50 countries. |
10,383 |
| 17 |
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 |
10,198 |
| 18 |
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. |
9,800 |
| 19 |
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 |
9,000 |
| 20 |
osakidetzaosakidetza.euskadi.eus
The company focuses on maintaining a consistent corporate identity through a new Corporate Identity Manual, ensuring uniformity across its affiliated organizations |
8,951 |
| 21 | 8,854 | |
| 22 | 8,100 | |
| 23 |
Institut Català de la Salutics.gencat.cat
The company provides healthcare services from pregnancy to old age, with a wide territorial coverage and a strong emphasis on education, research, and innovation |
7,936 |
| 24 |
Moevemoeveglobal.com
Production of sustainable energies based on green molecules like green hydrogen and 2G biofuels, plus ultrafast electric mobility solutions. |
7,527 |
| 25 |
Bankinterbankinter.com
A leading Spanish online banking brand focused on quality customer service and innovation, offering a wide range of financial products and services |
6,427 |
| 26 |
Hospital Clínic de Barcelonaclinicbarcelona.org
A leading public university hospital in Spain, offering quality healthcare, cutting-edge research, and professional training with a focus on humanized medicine |
6,159 |
| 27 | 6,038 | |
| 28 | 5,553 | |
| 29 | 5,374 | |
| 30 | 4,792 | |
| 31 |
Volarisvolaris.com
ultra-low-cost carrier providing point-to-point flights across Mexico, the United States, and Central America, offering low fares and extensive customer choice |
4,771 |
| 32 |
Naturgynaturgy.com
A multinational energy company with a 180-year history, focusing on renewables, renewable gas, energy efficiency, and circular economy to create value |
4,696 |
| 33 |
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 |
4,472 |
| 34 |
Hospital Universitari Vall d'Hebronvallhebron.com
A leading hospital complex in Catalonia with four large centers offering a wide range of medical and surgical specialties |
4,361 |
| 35 |
Coxabengoagrupocox.com
An international company specializing in innovative technology solutions for sustainability in energy, water, and infrastructure sectors with a focus on social responsibility |
4,132 |
| 36 |
ABANCAabanca.com
A leading financial institution in Spain focused on a new approach to banking, combining traditional values with innovation to meet client needs |
4,117 |
| 37 |
Vueling Airlinesvueling.com
Low-cost airline operating primarily in Spain and Europe, connecting major cities and islands with a focus on sustainability and growth. |
4,087 |
| 38 |
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 |
4,079 |
| 39 | 4,000 | |
| 40 |
Gas Natural Fenosagasnaturalfenosa.com
Leading multinational company operating in gas and electricity sectors, serving over 20 million customers across 23 countries worldwide. |
3,989 |
| 41 |
CHRISTUS MUGUERZA
A catholic health system providing comprehensive care with love and dignity through hospitals, clinics, ambulances, and nursing schools across multiple countries |
3,879 |
| 42 | 3,834 | |
| 43 |
HM Hospitaleshmhospitales.com
Private healthcare group with 54 centers offering specialized hospitals, clinics, and integrated care focused on quality, innovation, and patient wellbeing. |
3,803 |
| 44 |
Bankiacaixabank.com
Leading Spanish financial institution in retail, business, corporate finance, capital markets, asset management, and private banking across six autonomous communities. |
3,778 |
| 45 |
Barcelona Children's Hospital Sant Joan de Déusjdhospitalbarcelona.org
A teaching hospital specializing in pediatrics, gynecology, and obstetrics in Barcelona, Catalonia Privately owned, affiliated with the Hospitaller Order of St John of God |
3,728 |
| 46 |
Vithas
Operates 22 hospitals and 39 medical centers across Spain, providing accredited, high-quality healthcare services to over five million patients annually. |
3,710 |
| 47 |
Hospital del Marhospitaldelmar.cat
Modern general hospital treating medium and high complexity pathologies, affiliated with a university and emphasizing research, located in a diverse, multicultural area |
3,654 |
| 48 |
Unicajaunicajabanco.es
A leading bank in Spain with a strong financial history, serving over three million clients with quality and close financial services in various regions |
3,615 |
| 49 |
santalucía segurossantalucia.es
Providing insurance and related services through multiple companies, focusing on customer care, innovation, and employee well-being across Spain. |
3,582 |
| 50 |
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 |
3,457 |
| 51 |
Ibercajaibercaja.es
A leading Spanish banking group offering high-quality financial services to individuals, institutions, and businesses through over 1,250 branches and online banking |
3,278 |
| 52 | 3,263 | |
| 53 |
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 |
3,225 |
| 54 |
Hospital Gregorio Marañónhggm.es
A public hospital in Madrid known for highly trained professionals, teaching and research, technological advancements, and national/international specialty care |
3,146 |
| 55 |
Fundación Hospitalariasfundacionhospitalarias.org
Non-profit institution providing specialized care, assistance, and social reintegration for individuals with mental illness, intellectual disabilities, and other conditions worldwide |
3,112 |
| 56 |
Servizo Galego de Saúdesergas.gal
Management and leadership of all public health centers and services in Galicia, ensuring comprehensive healthcare under regional government authority. |
3,056 |
| 57 |
Transports Metropolitans de Barcelona (TMB)tmb.cat
The company is the main public transport operator in Catalonia, providing bus and metro networks, as well as leisure transport services |
3,050 |
| 58 |
Hospitenhospiten.com
An international healthcare network with nearly 50 years of experience, operating private medical centers in multiple countries and serving over 17 million patients annually |
3,000 |
| 59 |
Air Europaaireuropa.com
Airline operating domestic Spanish routes, European, North African, and transoceanic destinations with a fleet of modern aircraft. |
2,969 |
| 60 |
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 |
2,963 |
| 61 |
Hospital de la Santa Creu i Sant Pausantpau.cat
A centuries-old highly complex hospital in Spain, primarily serving Barcelona and Catalonia, with a prominent national and international reputation |
2,826 |
| 62 |
Banco de Españabde.es
National central bank and banking supervisor, managing monetary policy, currency issuance, payment systems, and financial system stability in Spain. |
2,585 |
| 63 |
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 |
2,560 |
| 64 |
Cellnex Telecomcellnex.com
The company is a leading provider of wireless telecommunications and broadcasting infrastructure across Europe, with a focus on shared-use services |
2,542 |
| 65 |
Servicio Extremeño de Saludsaludextremadura.ses.es
Public health organization in Extremadura, Spain, responsible for providing healthcare services, part of the National Health System, established in 1986 |
2,454 |
| 66 |
Santander Españabancosantander.es
Providing innovative banking products and solutions, building lasting customer relationships, supporting personal and business project development with expertise and resources. |
2,386 |
| 67 |
Kutxabankportal.kutxabank.es
Financial institution operating a local banking model, prioritizing clients, fostering long-term relationships with individuals and SMEs, and reinvesting profits into society. |
2,360 |
| 68 |
Banco Mediolanumbancomediolanum.es
This company offers personalized financial services through Family Bankers and Multichannel Banking, part of a banking group with millions of clients across Europe |
2,324 |
| 69 |
Aqualiaaqualia.com
Aqualia provides water management services to municipalities and private entities in 18 countries, serving 452 million people with sustainable solutions |
2,316 |
| 70 |
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 |
2,302 |
| 71 |
Veolia | Españaveolia.es
Leading environmental services provider specialized in decarbonization and circular economy through optimized management of energy water and waste for cities and industries |
2,272 |
| 72 | 2,232 | |
| 73 |
Hospital Universitari de Bellvitgebellvitgehospital.cat
Tertiary-care teaching facility with 700 beds, offering high complexity medical care to over 2 million people, ranked among the top hospitals in the state |
2,231 |
| 74 |
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 |
2,229 |
| 75 |
Hospital La Fe de Valenciahospital-lafe.com
A leading public healthcare center in Spain's Valencia region, offering comprehensive medical services, teaching programs, and research facilities with over 7,000 staff members |
2,157 |
| 76 |
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 |
2,145 |
| 77 |
Grupo Hospital Privadogrupohospitalprivado.com
An integrated health system focused on quality medical care, service management, technology, and prevention for sustainable healthcare |
2,140 |
| 78 |
ASEPEYOasepeyo.es
Leader in accident & occupational disease insurance with services benefiting society, companies, workers & employees Protecting 2 million workers & 272,000+ companies nationwide |
2,119 |
| 79 |
Sanatorio Allende S.A.sanatorioallende.com
A medical facility in Córdoba founded in 1938, providing high-quality healthcare services with specialized staff, modern technology, and infrastructure |
2,098 |
| 80 |
Mutua Universalmutuauniversal.net
Voluntary association providing healthcare and economic benefits to workers, collaborating with Social Security across all autonomous communities. |
2,065 |
| 81 |
FCC Medio Ambientefccma.com
A global leader in environmental services, offering waste collection, recycling, energy recovery, cleaning, maintenance, and industrial waste treatment solutions worldwide |
2,061 |
| 82 |
Servicio Aragones de Salud (SALUD)aragon.es
Management and provision of public healthcare services within the Autonomous Community of Aragón, integrated into the National Health System. |
2,045 |
| 83 |
Hospital Privado Universitario de Córdobahospitalprivado.com.ar
A private university hospital in Córdoba, Argentina, dedicated to providing high-quality medical care, research, and education for over 60 years |
2,041 |
| 84 |
Linea Directa Aseguradoralineadirectaaseguradora.com
Offers direct insurance products including home, vehicle, health, and pet coverage with a focus on digital innovation and customer proximity. |
1,981 |
| 85 |
Allianz Españaallianz.es
Providing life and non-life insurance products, investment solutions, and client services through agents, brokers, and banking networks in Spain. |
1,952 |
| 86 |
Groundforce España - Globalia Handling - Handling Servicesgroundforce.aero
Provider of ground handling services for third parties in Spain, serving over 250 customers, 175k departures, and 120k tons of cargo across 12 airports and 8 warehouses |
1,943 |
| 87 |
Voloteavolotea.com
Fast-growing European airline serving medium-sized cities, operating numerous routes and flights while prioritizing sustainable aviation practices and customer satisfaction |
1,889 |
| 88 |
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 |
1,875 |
| 89 |
LABORAL Kutxalaboralkutxa.com
A financial institution focused on cooperative banking, committed to serving clients democratically, creating jobs, and contributing to societal development for almost 60 years |
1,824 |
| 90 |
Parc Taulí Hospital Universitaritauli.cat
This institutional public entity provides healthcare services, education, research, and social activities for citizens, in collaboration with the Autonomous University of Barcelona |
1,786 |
| 91 |
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 |
1,772 |
| 92 | 1,768 | |
| 93 |
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. |
1,767 |
| 94 |
Parc Sanitari Sant Joan de Deupssjd.org
A network of healthcare, educational, and research facilities focused on mental health, social care, intellectual disabilities, and general hospital services |
1,746 |
| 95 |
Umivale Activaumivaleactiva.es
We are a non-profit organization that manages and protects workplace accident and occupational disease risks for associated companies, aiming to optimize their occupational health |
1,700 |
| 96 |
Exolumexolum.com
A European leader in liquid product logistics, specializing in innovative solutions for biofuels, hydrogen, and circular economy to shape the future |
1,650 |
| 97 |
Primafrioprimafrio.com
With over 60 years of experience, this international logistics operator specializes in transporting perishable goods and pharmaceuticals, focusing on sustainability and innovation |
1,648 |
| 98 |
ATENCION PRIMARIA SACYL
A Hospital and Health Care company in Segovia, Spain focused on providing primary care services within the Castile and León region |
1,614 |
| 99 |
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 |
1,593 |
| 100 |
Hospital de la Santa Creu i Sant Pausantpau.cat
A level 3 university hospital with over 600 years of history, offering all medical and surgical specialties to a community of 450,000 residents |
1,558 |
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.
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 Spain
- The largest companies in Spain 9,636
- Retail chains in Spain 1,098
- Wellness and Fitness Services companies in Spain 824
- Healthcare providers in Spain 575
- Manufacturers in Spain 484
- Software Development companies in Spain 467
- Financial services firms in Spain 425
- Food and Beverage Services companies in Spain 412
- Family-owned companies in Spain 409
- Retail Apparel and Fashion companies in Spain 399
- SaaS companies in Spain 399
- Hospitality companies in Spain 391
- IT Services and IT Consulting companies in Spain 365
- Consumer goods companies in Spain 363
- IT services companies in Spain 338
- Transportation, Logistics, Supply Chain and Storage companies in Spain 285
- Distributors and wholesalers in Spain 279
- Public sector organisations in Spain 277
- E-commerce companies in Spain 273
- Food and Beverage Manufacturing companies in Spain 269
- Hotel and hospitality groups in Spain 264
- Financial Services companies in Spain 233
- Insurance companies in Spain 226
- Food and beverage companies in Spain 218
The same list elsewhere in Spain
- Critical infrastructure operators in Community of Madrid 169
- Critical infrastructure operators in Catalonia 91
- Critical infrastructure operators in Andalusia 34
- Critical infrastructure operators in Valencian Community 31
- Critical infrastructure operators in Madrid 140
- Critical infrastructure operators in Barcelona 50