# The 30 largest publicly traded companies in Madrid

Tamtam tracks 55 publicly traded companies headquartered in Madrid. This list ranks the 30 largest by number of employees on LinkedIn, led by Telefónica, Prosegur and Indra Group. Their median headcount is 3,022. Half of them were founded in 1970 or later.

The publicly traded companies in Madrid are large, established firms across diverse sectors, including telecommunications, energy, and security. Telefónica is a global telecommunications company, while Prosegur specializes in private security. Repsol is a major player in oil and gas, and Amadeus revolutionizes the travel industry with IT services.

Most of these companies are headquartered in Madrid, underscoring the city's role as a major business hub. The founding dates provided, such as Naturgy (1843), Elecnor Group (1958), and Tecnicas Reunidas (1960), indicate a strong presence of companies with long operational histories.

🇪🇸 Madrid · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Telefónica](https://www.tamtam.ai/c/telefonica) (telefonica.com)<br>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 |  |
| 2 | [Prosegur](https://www.tamtam.ai/c/prosegur) (prosegur.com)<br>A global leader in private security, offering advanced solutions through five business lines with a strong focus on social responsibility | Security and Investigations | 🇪🇸 Madrid | 67,392 |  |
| 3 | [Indra Group](https://www.tamtam.ai/c/indra-group) (indragroup.com)<br>Leading multinational providing defense, space, air traffic management, and mobility solutions alongside information technology services, artificial intelligence, cybersecurity, and advanced digital transformation projects. | Defense and Space Manufacturing | 🇪🇸 Madrid | 39,308 |  |
| 4 | [repsol](https://www.tamtam.ai/c/repsol) (repsol.com)<br>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 |  |
| 5 | [Amadeus](https://www.tamtam.ai/c/amadeus) (amadeus.com)<br>A company revolutionizing the travel industry by inspiring innovation, partnerships, and responsibility, connecting the travel ecosystem and promoting social and environmental good | IT Services and IT Consulting | 🇪🇸 Madrid | 23,625 | 1987 |
| 6 | [Gestamp](https://www.tamtam.ai/c/gestamp) (gestamp.com)<br>A multinational company specializing in designing and manufacturing advanced metal components for vehicle manufacturers worldwide, focusing on lighter, safer, and more environmentally friendly products | Motor Vehicle Manufacturing | 🇪🇸 Madrid | 17,667 | 1997 |
| 7 | [Tecnicas Reunidas](https://www.tamtam.ai/c/tecnicas-reunidas) (tecnicasreunidas.es)<br>An international general contractor specializing in engineering and construction of industrial facilities in oil & gas, refining, power generation, infrastructures, and energy transition | Engineering Services | 🇪🇸 Madrid | 12,368 | 1960 |
| 8 | [Elecnor Group](https://www.tamtam.ai/c/elecnor-group) (grupoelecnor.com)<br>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 |
| 9 | [Endesa](https://www.tamtam.ai/c/endesa) (endesa.com)<br>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 |
| 10 | [Bankinter](https://www.tamtam.ai/c/bankinter) (bankinter.com)<br>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 |
| 11 | [Accenture España](https://www.tamtam.ai/c/accenture-espana) (accenture.com)<br>A global professional services company helping businesses and governments with digital transformation, cloud technology, data analytics, and industry expertise to drive tangible outcomes | Business Consulting and Services | 🇪🇸 Madrid | 6,208 |  |
| 12 | [Aena](https://www.tamtam.ai/c/aena) (aena.es)<br>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 |
| 13 | [Naturgy](https://www.tamtam.ai/c/naturgy) (naturgy.com)<br>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 |
| 14 | [OHLA Group](https://www.tamtam.ai/c/ohla-group) (ohla-group.com)<br>A global leader in construction, engineering, and development projects, focusing on transport infrastructure, unique buildings, and sustainable progress in various regions worldwide | Construction | 🇪🇸 Madrid | 4,270 | 1911 |
| 15 | [OVB Allfinanz España](https://www.tamtam.ai/c/ovb-allfinanz-espana) (ovb.es)<br>A leading financial advisory group in Europe, providing independent and personalized advice to clients across 14 countries based on life phases and long-term goals | Financial Services | 🇪🇸 Madrid | 3,022 | 1970 |
| 16 | [BBVA en España](https://www.tamtam.ai/c/bbva-en-espana) (bbva.es)<br>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 |  |
| 17 | [Dia España](https://www.tamtam.ai/c/dia-espana) (empleo.dia.es)<br>Leading proximity stores network with over 5,400 locations in Spain, Argentina, Brazil, and Portugal Committed to quality, community impact, and customer satisfaction | Retail | 🇪🇸 Madrid | 2,438 |  |
| 18 | [ACCIONA Energía](https://www.tamtam.ai/c/acciona-energia) (acciona-energia.com)<br>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 |  |
| 19 | [EZENTIS](https://www.tamtam.ai/c/ezentis) (ezentis.com)<br>A global industrial services group with 60 years of experience, specializing in operation and maintenance of infrastructure for energy and telecommunications companies in Latin America and Spain | Technology, Information and Internet | 🇪🇸 Madrid | 1,812 | 1959 |
| 20 | [EDP Renewables](https://www.tamtam.ai/c/edp-renewables) (edpr.com)<br>Global renewable energy company specializing in wind power generation with extensive international presence and significant operating capacity. | Renewable Energy Power Generation | 🇪🇸 Madrid | 1,449 |  |
| 21 | [Mediaset España](https://www.tamtam.ai/c/mediaset-espana) (mediaset.es)<br>Leading Spanish audiovisual group offering TV channels, digital platforms, film production, advertising, and content distribution across multiple global markets. | Broadcast Media Production and Distribution | 🇪🇸 Madrid | 1,364 |  |
| 22 | [Econocom España](https://www.tamtam.ai/c/econocom-espana) (econocom.es)<br>Econocom provides digital transformation solutions for large companies and public organizations, with financing, equipment distribution, and digital services expertise Operating in 16 countries with over 8,750 employees | IT Services and IT Consulting | 🇪🇸 Madrid | 1,305 |  |
| 23 | [Sngular](https://www.tamtam.ai/c/sngular) (sngular.com)<br>A next-generation technology partner delivering innovative solutions with deep expertise, a global network of innovators, and a focus on sustainability | IT Services and IT Consulting | 🇪🇸 Madrid | 1,285 | 2014 |
| 24 | [ROVI Pharmaceutical Company](https://www.tamtam.ai/c/rovi-pharmaceutical-company) (rovi.es)<br>Chemical and pharmaceutical company focused on own products, third-party manufacturing, and licensed product distribution to promote health globally. | Pharmaceutical Manufacturing | 🇪🇸 Madrid | 1,273 | 1946 |
| 25 | [Naturhouse](https://www.tamtam.ai/c/naturhouse) (naturhouse.com)<br>Franchise offering personalized weight loss programs designed by dietitians, based on reeducating eating habits to achieve a healthy weight Free consultations provided | Wellness and Fitness Services | 🇪🇸 Madrid | 1,249 | 1992 |
| 26 | [Enagás](https://www.tamtam.ai/c/enagas) (enagas.es)<br>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 |
| 27 | [PRISA](https://www.tamtam.ai/c/prisa) (prisa.com)<br>A leading company in creating and distributing cultural, educational, informational, and entertainment content in Spanish and Portuguese-speaking markets, reaching millions worldwide | Media Production | 🇪🇸 Madrid | 1,219 |  |
| 28 | [Allfunds](https://www.tamtam.ai/c/allfunds) (allfunds.com)<br>Connecting fund partners and distributors, offering mutual funds, ETFs, and alternatives on a scalable technology platform. Global dealing and distribution. | Financial Services | 🇪🇸 Madrid | 1,194 | 2000 |
| 29 | [ATRESMEDIA](https://www.tamtam.ai/c/atresmedia) (atresmedia.com)<br>ATRESMEDIA is a leading communication group in Spain, operating in television, digital development, radio, cinema, internet, events organization, and corporate social responsibility campaigns | Broadcast Media Production and Distribution | 🇪🇸 Madrid | 1,109 |  |
| 30 | [CHINA](https://www.tamtam.ai/c/china) (llyc.global)<br>It is an advertising agency founded in 2010, focusing on solving client problems rather than just managing accounts for advertisers. | Advertising Services | 🇪🇸 Madrid | 978 | 2010 |

## 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 12, 2026.

## More company lists in Madrid

- [The largest companies in Madrid](https://www.tamtam.ai/l/largest-companies-madrid) (2,650)
- [Multinational companies in Madrid](https://www.tamtam.ai/l/multinational-companies-madrid) (815)
- [Retail chains in Madrid](https://www.tamtam.ai/l/retail-chains-madrid) (259)
- [Financial services firms in Madrid](https://www.tamtam.ai/l/financial-services-firms-madrid) (231)
- [Professional services firms in Madrid](https://www.tamtam.ai/l/professional-services-firms-madrid) (227)
- [Wellness and Fitness Services companies in Madrid](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-madrid) (202)
- [Critical infrastructure operators in Madrid](https://www.tamtam.ai/l/critical-infrastructure-operators-madrid) (169)
- [Healthcare providers in Madrid](https://www.tamtam.ai/l/healthcare-providers-madrid) (161)
- [Companies with in-house R&D in Madrid](https://www.tamtam.ai/l/r-and-d-companies-madrid) (158)
- [Companies with a mobile app in Madrid](https://www.tamtam.ai/l/companies-with-mobile-app-madrid) (158)
- [Consulting firms in Madrid](https://www.tamtam.ai/l/consulting-firms-madrid) (157)
- [IT services companies in Madrid](https://www.tamtam.ai/l/it-services-companies-madrid) (155)
- [Education providers in Madrid](https://www.tamtam.ai/l/education-companies-madrid) (141)
- [IT Services and IT Consulting companies in Madrid](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-madrid) (138)
- [Software Development companies in Madrid](https://www.tamtam.ai/l/software-development-companies-madrid) (129)
- [Financial Services companies in Madrid](https://www.tamtam.ai/l/financial-services-companies-madrid) (125)
- [Insurance companies in Madrid](https://www.tamtam.ai/l/insurance-companies-madrid) (122)
- [SaaS companies in Madrid](https://www.tamtam.ai/l/saas-companies-madrid) (113)
- [Hotel and hospitality groups in Madrid](https://www.tamtam.ai/l/hospitality-groups-madrid) (104)
- [Manufacturers in Madrid](https://www.tamtam.ai/l/manufacturers-madrid) (91)
- [Public sector organisations in Madrid](https://www.tamtam.ai/l/public-sector-organisations-madrid) (90)
- [Retail Apparel and Fashion companies in Madrid](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-madrid) (89)
- [Corporate groups and holding companies in Madrid](https://www.tamtam.ai/l/holding-companies-madrid) (89)
- [Business Consulting and Services companies in Madrid](https://www.tamtam.ai/l/business-consulting-and-services-companies-madrid) (80)

## The same list elsewhere in Spain

- [Publicly traded companies in Spain](https://www.tamtam.ai/l/publicly-traded-companies-spain) (127)
- [Publicly traded companies in Community of Madrid](https://www.tamtam.ai/l/publicly-traded-companies-community-of-madrid) (67)

## The same list elsewhere

- [Publicly traded companies in the world](https://www.tamtam.ai/l/publicly-traded-companies-in-the-world) (11,535)
- [Publicly traded companies in Europe](https://www.tamtam.ai/l/publicly-traded-companies-in-europe) (3,623)

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Source: https://www.tamtam.ai/l/publicly-traded-companies-madrid