# The 30 largest multinational companies in Ankara

Tamtam tracks 57 multinational companies headquartered in Ankara. This list ranks the 30 largest by number of employees on LinkedIn, led by RÖNESANS HOLDİNG, Orta Doğu Teknik Üniversitesi / Middle East Technical University and OYAK. Their median headcount is 933. Half of them were founded in 1978 or later.

This selection of large multinational companies in Ankara highlights a strong presence in construction and civil engineering. Firms like RÖNESANS HOLDİNG, Limak Group of Companies, and Mapa Group are active in various sectors including construction, real estate, and energy, demonstrating diversified operations across Europe, Asia, and Africa. GÜRİŞ HOLDİNG and Yüksel Proje further reinforce this, specializing in infrastructure projects and engineering consultancy.

The companies represent a mix of established large groups, with several founded in the 1970s, such as Limak Group of Companies (1976), BOTAŞ (1974), and Mapa Group (1978). Beyond construction, other significant sectors include financial services with OYAK, higher education with Orta Doğu Teknik Üniversitesi, and motor vehicle manufacturing with MAN Türkiye A.Ş. This suggests a varied economic landscape with a strong foundation in industrial and infrastructure development.

🇹🇷 Ankara · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [RÖNESANS HOLDİNG](https://www.tamtam.ai/c/ronesans-holding) (ronesans.com)<br>A multinational conglomerate based in Ankara, specializing in construction, real estate, healthcare, and energy projects across Europe, Asia, and Africa | Holding Companies | 🇹🇷 Ankara | 7,087 |  |
| 2 | [Orta Doğu Teknik Üniversitesi / Middle East Technical University](https://www.tamtam.ai/c/orta-dogu-teknik-universitesi-middle-east-technical-university) (metu.edu.tr)<br>A leading public technical university in Ankara, Turkey, with a focus on research and a diverse international student population | Higher Education | 🇹🇷 Ankara | 5,301 | 1956 |
| 3 | [OYAK](https://www.tamtam.ai/c/oyak) (oyak.com.tr)<br>A successful organization in Turkey providing complementary pension funds and high value-added services across various sectors nationally and internationally with over 390,000 members | Financial Services | 🇹🇷 Ankara | 3,801 |  |
| 4 | [Türk Kızılay](https://www.tamtam.ai/c/turk-k-z-lay) (kizilay.org.tr)<br>A humanitarian organization founded by Turkish doctors in 1868 to provide aid to wounded soldiers on the battlefield | Non-profit Organizations | 🇹🇷 Ankara | 3,151 | 1868 |
| 5 | [Limak Group of Companies](https://www.tamtam.ai/c/limak-group-of-companies) (limak.com.tr)<br>Operating across diverse sectors including construction, energy, tourism, cement, infrastructure, technology, and food and beverage, with global and international operations. | Holding Companies | 🇹🇷 Ankara | 2,921 | 1976 |
| 6 | [BOTAŞ](https://www.tamtam.ai/c/botas) (botas.gov.tr)<br>A leading energy organization in Turkey focusing on oil and natural gas operations, LNG terminals, international transportation projects, and environmental sustainability | Oil and Gas | 🇹🇷 Ankara | 2,180 | 1974 |
| 7 | [MAN Türkiye A.Ş.](https://www.tamtam.ai/c/man-turkiye-a-s) (man.eu)<br>Established in 1966, this company operates a large production center in Turkey, specializing in developing and manufacturing buses for urban, travel, and mid-distance transportation | Motor Vehicle Manufacturing | 🇹🇷 Ankara | 2,100 | 1966 |
| 8 | [GÜRİŞ HOLDİNG](https://www.tamtam.ai/c/guris-holding) (guris.com.tr)<br>Leading construction group specializing in engineering and construction of various infrastructure projects such as metro systems, bridges, dams, and sustainable energy plants | Civil Engineering | 🇹🇷 Ankara | 1,654 | 1958 |
| 9 | [GAMA Holding](https://www.tamtam.ai/c/gama-holding) (gama.com.tr)<br>A global leader in constructing power plants, refineries, infrastructure, and high-rise buildings, along with investments in energy, health, and tourism sectors | Industrial Machinery Manufacturing | 🇹🇷 Ankara | 1,520 |  |
| 10 | [Mapa Group](https://www.tamtam.ai/c/mapa-group) (mapa.group)<br>Multinational company specializing in construction, hospitality, renewable energy, airports, and air freight with extensive global operations and project management expertise. | Construction | 🇹🇷 Ankara | 1,500 | 1978 |
| 11 | [HİDROMEK](https://www.tamtam.ai/c/hidromek) (hidromek.com)<br>Global manufacturer of construction machinery, producing a wide range of equipment and attachments, with a strong international presence and numerous design awards | Machinery Manufacturing | 🇹🇷 Ankara | 1,331 | 1978 |
| 12 | [Yüksel Proje](https://www.tamtam.ai/c/yuksel-proje) (yukselproje.com.tr)<br>A leading provider of design, engineering, and consultancy services for various sectors worldwide, with a focus on sustainable and innovative projects | Civil Engineering | 🇹🇷 Ankara | 1,284 | 1978 |
| 13 | [YDA Group](https://www.tamtam.ai/c/yda-group) (yda.com.tr)<br>A construction group with over half a century of experience in infrastructure projects, real estate development, aviation, healthcare, energy, and more | Construction | 🇹🇷 Ankara | 1,263 |  |
| 14 | [ASTOR A.Ş.](https://www.tamtam.ai/c/astor-a-s) (astoras.com.tr)<br>Leading manufacturer in the electromechanical industry sector, specializing in transformers and switchgear products, with a focus on quality, innovation, and global presence | Electric Power Transmission, Control, and Distribution | 🇹🇷 Ankara | 1,127 | 1983 |
| 15 | [Lokman Hekim Sağlık Grubu](https://www.tamtam.ai/c/lokman-hekim-sagl-k-grubu) (lokmanhekim.com.tr)<br>A healthcare group with multiple hospitals and medical facilities focused on providing quality healthcare services with expert medical staff and modern technology | Hospitals and Health Care | 🇹🇷 Ankara | 933 | 1996 |
| 16 | [GEN](https://www.tamtam.ai/c/gen-ankara) (en.genilac.com.tr)<br>Leading pharmaceutical specializing in in-licensing, out-licensing, and drug development Produces innovative therapies and competitive products for international markets with GMP-certified manufacturing facility | Pharmaceutical Manufacturing | 🇹🇷 Ankara | 700 | 1998 |
| 17 | [Bozankaya A.Ş.](https://www.tamtam.ai/c/bozankaya-a-s) (bozankaya.com.tr)<br>An innovative R&D-driven organization in Turkey, specializing in electric buses, rail system vehicles, and commercial electric vehicles for urban public transport | Motor Vehicle Manufacturing | 🇹🇷 Ankara | 689 | 1989 |
| 18 | [Onur Group](https://www.tamtam.ai/c/onur-group) (onurgroup.com)<br>Specializing in road, airport, dam, and infrastructure projects internationally, this organization excels in timely, high-quality completion using advanced technology and skilled personnel | Construction | 🇹🇷 Ankara | 647 | 1981 |
| 19 | [MEFA GROUP](https://www.tamtam.ai/c/mefa-group) (mefaendustri.com)<br>Leading European producer of dishwasher baskets, oven grills, packaging, insulation styrofoam, rubber products, and more Specializing in R&D for automotive and aerospace sectors | Industrial Machinery Manufacturing | 🇹🇷 Ankara | 644 | 2006 |
| 20 | [Koluman Motorlu Araçlar A.Ş.](https://www.tamtam.ai/c/koluman-motorlu-araclar-a-s) (koluman.com.tr)<br>A diversified business with a focus on automotive sector, offering sales, after-sales services, production, assembly, insurance services, leasing activities, and expansion into export markets | Motor Vehicle Manufacturing | 🇹🇷 Ankara | 628 | 1965 |
| 21 | [Fernas Construction Company Inc.](https://www.tamtam.ai/c/fernas-construction-company-inc) (fernas.com.tr)<br>A Turkey-based construction company, established in 1982, with projects in Qatar, India, Kazakhstan, Iraq, Bangladesh, and Oman, specializing in various infrastructure construction projects worldwide | Oil and Gas | 🇹🇷 Ankara | 579 |  |
| 22 | [Europower Enerji ve Otomasyon Teknolojileri San.ve Tic. A.Ş.](https://www.tamtam.ai/c/europower-enerji-ve-otomasyon-teknolojileri-san-ve-tic-a-s) (europowerenerji.com.tr)<br>Specializing in designing, developing, and manufacturing LV-MV-HV electrical systems, offering turn-key contracting services for power generation, transmission, and distribution projects worldwide | Appliances, Electrical, and Electronics Manufacturing | 🇹🇷 Ankara | 563 | 2009 |
| 23 | [Özaltın Holding](https://www.tamtam.ai/c/ozalt-n-holding) (ozaltin.com)<br>Leading organization in Turkey, specializing in construction, infrastructure projects such as dams, water treatment facilities, roads, bridges, railways, and various other sectors globally | Construction | 🇹🇷 Ankara | 561 | 1965 |
| 24 | [Cumhuriyet Halk Partisi (CHP)](https://www.tamtam.ai/c/cumhuriyet-halk-partisi-chp) (chp.org.tr)<br>Established in 1923, this organization led by Mustafa Kemal Atatürk, focuses on promoting national independence, democracy, secularism, and economic development in Turkey | Political Organizations | 🇹🇷 Ankara | 525 | 1923 |
| 25 | [AKGÜN](https://www.tamtam.ai/c/akgun) (akgun.com.tr)<br>A technology-focused organization offering solutions in healthcare, telecommunications, education, and defense sectors, with expertise in software development, system integration, and information security technologies | IT Services and IT Consulting | 🇹🇷 Ankara | 519 | 1986 |
| 26 | [YİĞİT AKÜ](https://www.tamtam.ai/c/yigit-aku) (yigitaku.com)<br>Established in 1976, the company is a leading manufacturer of batteries, particularly lithium batteries for electric vehicles, exporting to over 100 countries worldwide | Motor Vehicle Manufacturing | 🇹🇷 Ankara | 519 | 1976 |
| 27 | [YILDIZLAR GRUP](https://www.tamtam.ai/c/yildizlar-grup) (yildizlar.com)<br>With over 40 years of experience, the group specializes in construction, infrastructure, and energy projects, expanding internationally while delivering high-quality work on time | Construction | 🇹🇷 Ankara | 502 | 1968 |
| 28 | [SGDD-ASAM](https://www.tamtam.ai/c/sgdd-asam) (sgdd.org.tr)<br>A non-profit organization supporting refugees and asylum seekers in Turkey, providing psycho-social support, advocating for their rights, and analyzing migration movements | Non-profit Organizations | 🇹🇷 Ankara | 494 | 1995 |
| 29 | [Mesa Holding](https://www.tamtam.ai/c/mesa-holding) (mesaholding.com.tr)<br>A multifaceted organization embracing innovation, technology, and social responsibility, with specialties in construction, agriculture, energy, tourism, and more, founded in 1969 in Istanbul | Construction | 🇹🇷 Ankara | 479 | 1969 |
| 30 | [Meteksan Savunma](https://www.tamtam.ai/c/meteksan-savunma) (meteksan.com)<br>Specializing in high-tech defense products, this organization develops radar, surveillance, communication, and acoustic systems for military and security forces, while also supporting education through scholarships | Defense and Space Manufacturing | 🇹🇷 Ankara | 449 | 2006 |

## 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 11, 2026.

## More company lists in Ankara

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- [Manufacturers in Ankara](https://www.tamtam.ai/l/manufacturers-ankara) (52)
- [Companies with in-house R&D in Ankara](https://www.tamtam.ai/l/r-and-d-companies-ankara) (48)
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- [Education providers in Ankara](https://www.tamtam.ai/l/education-companies-ankara) (32)
- [Critical infrastructure operators in Ankara](https://www.tamtam.ai/l/critical-infrastructure-operators-ankara) (29)
- [Construction companies in Ankara](https://www.tamtam.ai/l/construction-companies-ankara) (29)
- [Hardware manufacturers in Ankara](https://www.tamtam.ai/l/hardware-companies-ankara) (28)
- [Aerospace and defence companies in Ankara](https://www.tamtam.ai/l/aerospace-and-defense-companies-ankara) (26)

## The same list elsewhere in Turkey

- [Multinational companies in Turkey](https://www.tamtam.ai/l/multinational-companies-turkey) (790)
- [Multinational companies in Istanbul](https://www.tamtam.ai/l/multinational-companies-istanbul) (348)
- [Multinational companies in Izmir](https://www.tamtam.ai/l/multinational-companies-izmir) (26)

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Source: https://www.tamtam.ai/l/multinational-companies-ankara