# List of companies with in-house R&D in Basque Country

Tamtam tracks 99 companies with in-house R&D headquartered in Basque Country. This list ranks the 50 largest by number of employees on LinkedIn, led by Siemens Gamesa, CAF (Construcciones y Auxiliar de Ferrocarriles) and Eroski. Their median headcount is 587. Half of them were founded in 1964 or later. The most common headquarters are Bilbao (4) and San Sebastián (4).

These companies with in-house R&D in Basque Country operate in diverse sectors, with a notable presence in engineering and manufacturing. Siemens Gamesa, founded in 2017, is a global technology leader in renewable energy. CAF, established in 1917, designs and manufactures sustainable transportation systems. IDOM Consulting, Engineering, Architecture, from 1957, provides multinational consulting services. Sener, founded in 1956, offers solutions across aerospace, defense, and energy sectors. EHU, a public research university, and ITP Aero, specializing in aircraft engines, also feature among the largest.

A significant cluster of companies is involved in engineering services, including IDOM Consulting, Engineering, Architecture and Sener. The data shows a mix of well-established companies such as CAF, founded in 1917, and newer entities like Siemens Gamesa, established in 2017, indicating a blend of heritage and recent growth in the region's R&D landscape.

🇪🇸 Basque Country · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Siemens Gamesa](https://www.tamtam.ai/c/siemens-gamesa) (siemensgamesa.com)<br>Global technology leader in renewable energy industry, specializing in wind turbine development, manufacturing, installation, and maintenance Driving energy transition towards sustainability | Renewable Energy Semiconductor Manufacturing | 🇪🇸 Zamudio | 19,821 | 2017 |
| 2 | [CAF (Construcciones y Auxiliar de Ferrocarriles)](https://www.tamtam.ai/c/caf-construcciones-y-auxiliar-de-ferrocarriles) (cafmobility.com)<br>Designs and manufactures advanced sustainable transportation systems including accessible rail vehicles and zero-emission urban buses worldwide. | Motor Vehicle Manufacturing | 🇪🇸 Beasain | 10,000 | 1917 |
| 3 | [Eroski](https://www.tamtam.ai/c/eroski) (corporativo.eroski.es)<br>A multinational socio-business group with over 50,000 employees, specializing in retail sales through a vast network of supermarkets and hypermarkets | Retail | 🇪🇸 Elorrio | 7,340 | 1969 |
| 4 | [IDOM Consulting, Engineering, Architecture](https://www.tamtam.ai/c/idom-consulting-engineering-architecture) (idom.com)<br>A multinational consulting, engineering, and architecture firm offering personalized client services, delivering independent, impartial global projects with a diverse, engaged workforce | Engineering Services | 🇪🇸 Bilbao | 5,424 | 1957 |
| 5 | [Sener](https://www.tamtam.ai/c/sener) (group.sener)<br>Responds to demanding challenges with innovative, efficient solutions, advancing society across aerospace, defense, energy, mobility, data centers, and digital sectors for 70 years. | Engineering Services | 🇪🇸 Getxo | 4,878 | 1956 |
| 6 | [EHU](https://www.tamtam.ai/c/ehu) (ehu.eus)<br>A public research university rooted in Basque society, open to the world, with intellectual leadership and ethical and social commitment | Higher Education | 🇪🇸 Leioa | 4,520 | 1980 |
| 7 | [ITP Aero](https://www.tamtam.ai/c/itp-aero) (itpaero.com)<br>A leading aircraft engine and component company developing technology for a sustainable aerospace future, with global facilities and commitment to net zero carbon emissions | Aviation and Aerospace Component Manufacturing | 🇪🇸 Zamudio | 3,345 | 1989 |
| 8 | [Orona Group](https://www.tamtam.ai/c/orona-group) (orona-group.com)<br>Design manufacture install maintain modernize lifts escalators with innovations in traffic management space optimization comfort safety across Europe. | Mechanical Or Industrial Engineering | 🇪🇸 Hernani | 2,818 | 1964 |
| 9 | [CIE Automotive](https://www.tamtam.ai/c/cie-automotive) (cieautomotive.com)<br>An industrial group specializing in supplying automotive components and subassemblies on a global scale, offering various technologies to meet customer needs | Motor Vehicle Parts Manufacturing | 🇪🇸 Bilbao | 2,561 | 2002 |
| 10 | [University of Deusto](https://www.tamtam.ai/c/university-of-deusto) (deusto.es)<br>A renowned university offering competency-based education, values-driven teaching, specialized research, and an international perspective for over 125 years | Higher Education | 🇪🇸 Bilbao | 2,169 | 1886 |
| 11 | [ORONA](https://www.tamtam.ai/c/orona) (orona-group.com)<br>A European business group specializing in vertical lifting solutions, offering design, manufacturing, installation, maintenance, and modernization of elevators and escalators | Construction | 🇪🇸 Hernani | 1,659 | 1964 |
| 12 | [FAES FARMA](https://www.tamtam.ai/c/faes-farma) (faesfarma.com)<br>A Spanish pharmaceutical company with international presence, Faes Farma conducts research, produces, and markets pharmaceutical products and raw materials, exporting globally | Pharmaceutical Manufacturing | 🇪🇸 Vizcaya | 1,519 | 1933 |
| 13 | [TECNALIA Research & Innovation](https://www.tamtam.ai/c/tecnalia-research-and-innovation) (tecnalia.com)<br>Tecnalia Research & Innovation is a leading private technological center in Spain focused on market-oriented and specialized applied research to contribute to business and societal growth | Research Services | 🇪🇸 Donostia-San Sebastián | 1,468 | 2010 |
| 14 | [Arteche](https://www.tamtam.ai/c/arteche) (arteche.com)<br>A leading provider of high-tech solutions and equipment for the electric power industry worldwide, including instrument transformers, relays, protection equipment, and automation systems | Electrical Equipment Manufacturing | 🇪🇸 Mungia | 1,422 | 1946 |
| 15 | [Teknei](https://www.tamtam.ai/c/teknei) (teknei.com)<br>A leading technology services and consulting firm specializing in innovative digital solutions, business automation, cybersecurity, and infrastructure modernization, with a focus on fostering innovation and collaboration among its team | IT Services and IT Consulting | 🇪🇸 Bilbao | 1,242 | 2010 |
| 16 | [FAGOR EDERLAN \| Global Automotive Components](https://www.tamtam.ai/c/fagor-ederlan-global-automotive-components) (fagorederlan.com)<br>A global leader in manufacturing chassis, powertrain, and structural components for the automotive industry with a focus on sustainability and innovation | Motor Vehicle Parts Manufacturing | 🇪🇸 Eskoriatza | 1,117 | 1963 |
| 17 | [ULMA Packaging](https://www.tamtam.ai/c/ulma-packaging) (ulmapackaging.com)<br>Leading provider of packaging solutions offering personalization, friendly service, and cutting-edge technology to meet customer needs | Machinery Manufacturing | 🇪🇸 Oñati | 1,112 | 1961 |
| 18 | [Salto](https://www.tamtam.ai/c/salto) (saltosystems.com)<br>A global leader in access control technologies, part of a unique brand platform focused on digital transformation through innovative solutions | Appliances, Electrical, and Electronics Manufacturing | 🇪🇸 Oiartzun | 1,056 | 2001 |
| 19 | [TAMOIN](https://www.tamtam.ai/c/tamoin) (tamoin.com)<br>Specializing in industrial services such as engineering, construction, maintenance, and overhauls for clients in renewable energies, power generation, and oil & gas sectors | Mechanical Or Industrial Engineering | 🇪🇸 Erandio/ Altzaga | 861 | 1956 |
| 20 | [Sidenor Aceros Especiales](https://www.tamtam.ai/c/sidenor-aceros-especiales) (sidenor.com)<br>A leading European steel producer of special steel long products and cold finished products with production centers and business delegations across Europe | Mining | 🇪🇸 Basauri | 643 |  |
| 21 | [SPC](https://www.tamtam.ai/c/spc-vitoria-gasteiz) (spc.es)<br>The company advocates for a Smart vision of technology that connects everything and everyone, designed to promote relationships and freedom, not exclusivity or status | Business Consulting and Services | 🇪🇸 Vitoria-Gasteiz | 640 | 1987 |
| 22 | [AMPO](https://www.tamtam.ai/c/ampo) (ampo.com)<br>Global leader in stainless steel and high alloy castings, and highly engineered valves for severe applications worldwide, providing technical support and maintenance services | Oil, Gas, and Mining | 🇪🇸 Idiazabal | 625 | 1964 |
| 23 | [Tekniker](https://www.tamtam.ai/c/tekniker) (tekniker.es)<br>A technology center specializing in Advanced Manufacturing, Material Engineering, and ICTs to enhance society's growth and competitiveness sustainably | Research Services | 🇪🇸 Eibar | 619 | 1981 |
| 24 | [TUBACEX](https://www.tamtam.ai/c/tubacex) (tubacex.com)<br>A world leader in designing, manufacturing, and installing industrial products and services for the energy and mobility sectors globally | Oil and Gas | 🇪🇸 Llodio | 601 | 1963 |
| 25 | [ORBEA](https://www.tamtam.ai/c/orbea) (orbea.com)<br>Design and manufacture personalized, innovative bicycles for passionate riders who value fairness, sustainability, and achieving their full potential. | Sporting Goods Manufacturing | 🇪🇸 Mallabia | 587 | 1840 |
| 26 | [Fagor Arrasate S. Coop.](https://www.tamtam.ai/c/fagor-arrasate-s-coop) (fagorarrasate.com)<br>A global leader in the design and manufacture of mechanical and hydraulic presses, stamping systems, cutting and processing lines, and metal part forming equipment | Automation Machinery Manufacturing | 🇪🇸 Arrasate-Mondragon | 534 | 1957 |
| 27 | [Vaillant Group Spain](https://www.tamtam.ai/c/vaillant-group-spain) (vaillant-group.com)<br>A leader in heating, ventilation, and air conditioning technology, specializing in high-efficiency products with a focus on sustainability and employee well-being | Renewables & Environment | 🇪🇸 Zamudio | 500 |  |
| 28 | [Multiverse Computing](https://www.tamtam.ai/c/multiverse-computing) (multiversecomputing.com)<br>A deep-tech company specializing in Quantum Computing and AI, offering hyper-efficient software for various industries to gain a competitive edge | Software Development | 🇪🇸 San Sebastián | 497 | 2019 |
| 29 | [Walter Pack](https://www.tamtam.ai/c/walter-pack) (walterpack.com)<br>Designs and manufactures functional decorative plastic parts for automotive, home appliances, and consumer electronics, utilizing advanced technologies and bespoke solutions. | Motor Vehicle Parts Manufacturing | 🇪🇸 Igorre | 487 | 1992 |
| 30 | [BATZ GROUP](https://www.tamtam.ai/c/batz-group) (batz.com)<br>Designing, manufacturing composite lightweight structures, active aerodynamic components, mechanical and mechatronic control systems to reduce CO2 emissions for automotive OEMs. | Motor Vehicle Manufacturing | 🇪🇸 Igorre | 464 | 1963 |
| 31 | [ZIV](https://www.tamtam.ai/c/ziv) (zivautomation.com)<br>Designs, manufactures, and markets digital equipment and systems for protection, control, measurement, and communication in the electrical power industry Offers engineering, services, and system integration | Electrical Equipment Manufacturing | 🇪🇸 Zamudio | 455 | 1993 |
| 32 | [Ceit Research Center](https://www.tamtam.ai/c/ceit-research-center) (ceit.es)<br>A non-profit research centre affiliated with the University of Navarra specializing in applied industrial research, doctoral teaching, and collaboration with R&D departments | Research Services | 🇪🇸 San Sebastián | 446 | 1982 |
| 33 | [IKERLAN](https://www.tamtam.ai/c/ikerlan) (ikerlan.es)<br>A leading technology center offering competitive value to industry through digital technologies, artificial intelligence, cybersecurity, mechatronics, and energy solutions | Research Services | 🇪🇸 Arrasate-Mondragón | 438 | 1974 |
| 34 | [Ingeteam Power Technology](https://www.tamtam.ai/c/ingeteam-power-technology) (ingeteam.com)<br>Specializing in power and control electronics, generators, motors, and pumps, the company offers maintenance services and operates globally with a focus on R&D | Appliances, Electrical, and Electronics Manufacturing | 🇪🇸 Zamudio | 420 |  |
| 35 | [Tubos Reunidos Group](https://www.tamtam.ai/c/tubos-reunidos-group) (tubosreunidosgroup.com)<br>Global leader in premium seamless steel tubular products, specializing in niche segments with tailored solutions for clients worldwide in various industries | Manufacturing | 🇪🇸 Amurrio | 419 | 1892 |
| 36 | [Petronor, S.A.](https://www.tamtam.ai/c/petronor-s-a) (petronor.eus)<br>A company founded in 1968 in Spain, specializing in refining and marketing petroleum products, pioneering in technology and community involvement | Oil and Gas | 🇪🇸 Muskiz | 403 | 1968 |
| 37 | [DANOBAT](https://www.tamtam.ai/c/danobat) (danobat.com)<br>A global leader in manufacturing innovative precision grinding machines, lathes, and robotic systems, providing tailored solutions to enhance competitiveness worldwide | Industrial Machinery Manufacturing | 🇪🇸 Elgóibar | 399 | 1954 |
| 38 | [Matia](https://www.tamtam.ai/c/matia) (matiafundazioa.eus)<br>A non-profit organization with over 130 years of experience in caring for the elderly, providing personalized services to promote autonomy and dignity in aging | Hospitals and Health Care | 🇪🇸 Donostia | 394 | 1881 |
| 39 | [Viralgen](https://www.tamtam.ai/c/viralgen) (viralgen.com)<br>Develops and manufactures gene therapies, specifically AAV production, in a GMP-certified environment to advance health and welfare. | Biotechnology Research | 🇪🇸 San Sebastián | 385 | 2017 |
| 40 | [Copreci](https://www.tamtam.ai/c/copreci) (copreci.com)<br>Appliance manufacturer with a customer-oriented policy, operating internationally with 9 production centers and serving major appliance groups worldwide | Manufacturing | 🇪🇸 Aretxabaleta | 378 | 1963 |
| 41 | [HINE Group](https://www.tamtam.ai/c/hine-group) (hinegroup.com)<br>A leading provider of hydraulic systems, components, and cooling solutions for industrial and renewable energy sectors worldwide with over four decades of experience | Machinery Manufacturing | 🇪🇸 Olaberria | 378 | 1974 |
| 42 | [CIKAUTXO](https://www.tamtam.ai/c/cikautxo) (cikautxo.es)<br>A company belonging to the MONDRAGON Corporation specializing in developing and manufacturing rubber and plastic components for various applications | Motor Vehicle Parts Manufacturing | 🇪🇸 Berriatua | 363 | 1971 |
| 43 | [Gamesa Electric](https://www.tamtam.ai/c/gamesa-electric) (gamesaelectric.com)<br>Global leader in electrical equipment design and manufacturing for various industries, offering customizable solutions, leveraging parent company's technology expertise and worldwide maintenance services network | Renewable Energy Equipment Manufacturing | 🇪🇸 Zamudio | 354 |  |
| 44 | [Fagor Automation \| CNC & Feedback Systems \| Automation Solutions](https://www.tamtam.ai/c/fagor-automation-cnc-and-feedback-systems-automation-solutions) (fagorautomation.com)<br>Specializing in machine automation and control, this global leader offers tailored solutions with advanced software development capabilities and a wide international network | Automation Machinery Manufacturing | 🇪🇸 Arrasate | 351 | 1960 |
| 45 | [SARRALLE - Industrial Engineering Leader](https://www.tamtam.ai/c/sarralle-industrial-engineering-leader) (sarralle.com)<br>Industrial group specializing in engineering, design, and construction of equipment for the steel industry, with over 50 years of international project experience. | Industrial Machinery Manufacturing | 🇪🇸 Sarralle HQ | 334 | 1960 |
| 46 | [ERREKA](https://www.tamtam.ai/c/erreka) (erreka.com)<br>An autonomous cooperative group with diverse business units, focusing on innovation and international expansion, operating in over 15 countries worldwide | Construction | 🇪🇸 Antzuola | 320 | 1961 |
| 47 | [Irizar S., Coop.](https://www.tamtam.ai/c/irizar-s-coop) (irizar.com)<br>A leading business group in the bus and coach sector, electronics, communications, and rotating machinery with a global presence in over 90 countries | Ground Passenger Transportation | 🇪🇸 Ormaiztegi | 318 | 1889 |
| 48 | [Basque Culinary Center](https://www.tamtam.ai/c/basque-culinary-center) (bculinary.com)<br>The organization includes a Faculty of Gastronomic Sciences and a Center for Research, Innovation, and Entrepreneurship within Mondragon Unibertsitatea | Education Administration Programs | 🇪🇸 Donostia-San Sebastián | 316 | 2011 |
| 49 | [Vicomtech](https://www.tamtam.ai/c/vicomtech) (vicomtech.org)<br>An applied research center specializing in digital technologies, focusing on visual computing, interaction, and artificial intelligence to develop smart solutions | Research Services | 🇪🇸 San Sebastián | 310 | 2001 |
| 50 | [AZTI](https://www.tamtam.ai/c/azti) (azti.es)<br>Science and technology center focused on marine environment and food, developing high-impact projects for a healthy, sustainable, and fair society through cutting-edge products and technologies. | Research Services | 🇪🇸 Sukarrieta | 292 | 1981 |

## 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 Basque Country

- [The largest companies in Basque Country](https://www.tamtam.ai/l/largest-companies-basque-country) (464)
- [Multinational companies in Basque Country](https://www.tamtam.ai/l/multinational-companies-basque-country) (117)
- [Manufacturers in Basque Country](https://www.tamtam.ai/l/manufacturers-basque-country) (87)
- [Hardware manufacturers in Basque Country](https://www.tamtam.ai/l/hardware-companies-basque-country) (55)
- [Retail chains in Basque Country](https://www.tamtam.ai/l/retail-chains-basque-country) (31)
- [Wellness and Fitness Services companies in Basque Country](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-basque-country) (30)
- [Transportation, Logistics, Supply Chain and Storage companies in Basque Country](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-basque-country) (26)
- [Industrial Machinery Manufacturing companies in Basque Country](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-basque-country) (25)
- [IT services companies in Basque Country](https://www.tamtam.ai/l/it-services-companies-basque-country) (25)

## The same list elsewhere in Spain

- [Companies with in-house R&D in Spain](https://www.tamtam.ai/l/r-and-d-companies-spain) (1,067)
- [Companies with in-house R&D in Catalonia](https://www.tamtam.ai/l/r-and-d-companies-catalonia) (324)
- [Companies with in-house R&D in Community of Madrid](https://www.tamtam.ai/l/r-and-d-companies-community-of-madrid) (245)
- [Companies with in-house R&D in Valencian Community](https://www.tamtam.ai/l/r-and-d-companies-valencian-community) (102)
- [Companies with in-house R&D in Andalusia](https://www.tamtam.ai/l/r-and-d-companies-andalusia) (89)
- [Companies with in-house R&D in Region of Murcia](https://www.tamtam.ai/l/r-and-d-companies-region-of-murcia) (25)
- [Companies with in-house R&D in Madrid](https://www.tamtam.ai/l/r-and-d-companies-madrid) (158)
- [Companies with in-house R&D in Barcelona](https://www.tamtam.ai/l/r-and-d-companies-barcelona) (122)

## The same list elsewhere

- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Companies with in-house R&D in Europe](https://www.tamtam.ai/l/r-and-d-companies-in-europe) (20,169)

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Source: https://www.tamtam.ai/l/r-and-d-companies-basque-country