# 100 leading companies with in-house R&D in Turkey

Tamtam tracks 512 companies with in-house R&D headquartered in Turkey. This list ranks the 100 largest by number of employees on LinkedIn, led by Anadolu Group, Aselsan and Turkcell. Their median headcount is 2,425. Half of them were founded in 1983 or later. The most common headquarters are Istanbul (42), Ankara (7) and Bursa (3).

These companies with in-house R&D in Turkey are mostly large groups and established firms across a range of industries. They include multinational conglomerates like Anadolu Group, a holding company operating in seven sectors, and manufacturers such as Arçelik Türkiye, a global producer of consumer durables. Other notable firms are Turkcell, a telecommunications provider, and Trendyol Group, an e-commerce company delivering millions of packages daily.

The data shows a concentration of headquarters in Istanbul, which is home to many of these large organizations. Beyond Istanbul, other key locations include Ankara, where defense and aerospace firms like Aselsan and Turkish Aerospace are based, and Kocaeli, home to Ford Otosan, a major vehicle manufacturer.

🇹🇷 Turkey · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Anadolu Group](https://www.tamtam.ai/c/anadolu-group) (anadolugroup.com)<br>A multinational group operating in 7 sectors, with partnerships with leading global brands, linking Anatolia to the world | Holding Companies | 🇹🇷 Istanbul | 36,225 |  |
| 2 | [Aselsan](https://www.tamtam.ai/c/aselsan) (aselsan.com)<br>Large scale defense electronics provider specializing in communication, radar, electronic warfare, electro-optics, unmanned systems, weapon platforms, air defense, and medical technology integration. | Defense and Space Manufacturing | 🇹🇷 Mehmet Akif Ersoy | 21,021 | 1975 |
| 3 | [Turkcell](https://www.tamtam.ai/c/turkcell) (turkcell.com.tr)<br>A converged telecommunication and technology services provider based in Turkey, offering voice, data, TV, and value-added services on mobile and fixed networks globally | Telecommunications | 🇹🇷 Istanbul | 16,035 |  |
| 4 | [Turkish Aerospace](https://www.tamtam.ai/c/turkish-aerospace) (tusas.com)<br>A Turkish aerospace and defense firm specializing in the development, production, integration, and support of aircraft, helicopters, drones, and space systems | Aviation and Aerospace Component Manufacturing | 🇹🇷 Ankara | 12,576 | 1973 |
| 5 | [Trendyol Group](https://www.tamtam.ai/c/trendyol-group) (trendyol.com)<br>A highly successful e-commerce company backed by multiple investors, delivering millions of packages daily across 27 countries with a strong focus on technology and innovation | Technology, Information and Internet | 🇹🇷 Istanbul | 11,722 | 2010 |
| 6 | [Arçelik Türkiye](https://www.tamtam.ai/c/arcelik-turkiye) (arcelikglobal.com)<br>A global producer and marketer of consumer durables and electronics with manufacturing facilities in 7 countries, sales in 33 countries, and 30,000 employees | Manufacturing | 🇹🇷 Istanbul | 11,670 |  |
| 7 | [Ford Otosan](https://www.tamtam.ai/c/ford-otosan) (fordotosan.com.tr)<br>Manufacturing and exporting commercial vehicles and parts with extensive R&D, employing over 20,000 people across multiple facilities. | Motor Vehicle Manufacturing | 🇹🇷 Kocaeli | 9,735 | 1959 |
| 8 | [Farmasi](https://www.tamtam.ai/c/farmasi) (farmasi.com)<br>An international beauty and personal care manufacturer with a wide range of products, including cosmetics, fragrances, personal care, wellness, and household items | Personal Care Product Manufacturing | 🇹🇷 Istanbul | 8,541 | 1950 |
| 9 | [DeFacto](https://www.tamtam.ai/c/defacto) (defacto.com.tr)<br>Established in 2005, the company is a global fashion brand with over 500 stores and online operations serving millions of customers worldwide They focus on sustainable practices and technology innovation | Retail | 🇹🇷 Istanbul | 8,236 | 2004 |
| 10 | [Vestel](https://www.tamtam.ai/c/vestel) (vestel.com.tr)<br>Innovating and searching for the best technology solutions to bring comfort and joy to every home, striving for excellence with Vestel Why not? | Computers and Electronics Manufacturing | 🇹🇷 Şişli | 8,132 | 1984 |
| 11 | [Şişecam](https://www.tamtam.ai/c/sisecam) (sisecam.com)<br>Global player in glass and chemicals industry, operating in all core glass production areas, including flat glass, glassware, glass packaging, and glass fiber | Glass, Ceramics and Concrete Manufacturing | 🇹🇷 Istanbul | 8,006 | 1935 |
| 12 | [Hacettepe University](https://www.tamtam.ai/c/hacettepe-university) (hacettepe.edu.tr)<br>A prestigious institution offering education, research, and public services in various fields such as health sciences, medicine, and technology | Higher Education | 🇹🇷 Ankara | 7,772 | 1967 |
| 13 | [Hayat](https://www.tamtam.ai/c/hayat) (hayat.com)<br>A global leader in fast moving consumer goods, specializing in branded diapers, tissues, and personal care products Operating in 100 countries with 16 powerful brands | Manufacturing | 🇹🇷 Istanbul | 6,989 | 1987 |
| 14 | [Kuveyt Turk Participation Bank](https://www.tamtam.ai/c/kuveyt-turk-participation-bank) (kuveytturk.com.tr)<br>Specializing in interest-free finance with a customer-focused approach, innovative technology, and digital transformation Leading in asset size and Islamic banking, supporting mega projects and entrepreneurship | Banking | 🇹🇷 Istanbul | 6,740 | 1989 |
| 15 | [ROKETSAN](https://www.tamtam.ai/c/roketsan) (roketsan.com.tr)<br>Designing, developing, manufacturing rockets and missiles as a leading national institution focused on defense industry advancements. | Defense and Space Manufacturing | 🇹🇷 Ankara | 6,196 | 1988 |
| 16 | [TOFAS](https://www.tamtam.ai/c/tofas) (tofas.com.tr)<br>Turkish automotive company, R&D center, vehicle production for multiple brands, domestic market representation for various luxury automotive brands. | Motor Vehicle Manufacturing | 🇹🇷 Istanbul | 5,996 | 1968 |
| 17 | [Eczacıbaşı Topluluğu](https://www.tamtam.ai/c/eczac-bas-toplulugu) (eczacibasi.com.tr)<br>Founded in 1942, the group operates in various industries such as bathroom, ceramics, consumer products, health, finance, and technology, contributing to societal development and sustainability | Manufacturing | 🇹🇷 Istanbul | 5,960 |  |
| 18 | [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 |
| 19 | [Abdi Ibrahim Pharmaceuticals](https://www.tamtam.ai/c/abdi-ibrahim-pharmaceuticals) (abdiibrahim.com.tr)<br>Leader in Turkish pharmaceutical industry since 1912, with a large product portfolio, global presence, strong R&D focus, and commitment to sustainability | Pharmaceutical Manufacturing | 🇹🇷 Istanbul | 5,174 | 1912 |
| 20 | [Tüpraş](https://www.tamtam.ai/c/tupras) (tupras.com.tr)<br>Refines crude oil, distributes fuel, transports goods, trades oil products, generates electricity, and invests in energy transition solutions. | Oil and Gas | 🇹🇷 Istanbul | 5,108 |  |
| 21 | [Eti](https://www.tamtam.ai/c/eti) (etietieti.com)<br>Global brand with 9 plants, 45 brands, and 300 products, spreading happiness through snacks consumed in 60 countries worldwide | Food and Beverage Services | 🇹🇷 Eskişehir | 4,925 | 1961 |
| 22 | [Togg](https://www.tamtam.ai/c/togg) (togg.com.tr)<br>A collaboration aiming to create a global mobility brand focused on designing electric and connected vehicles to build a sustainable future | Technology, Information and Internet | 🇹🇷 Gebze | 4,918 | 2018 |
| 23 | [Mercedes-Benz Türk A.Ş.](https://www.tamtam.ai/c/mercedes-benz-turk-a-s) (mercedesbenzturk.com.tr)<br>Manufacturing intercity and city buses, heavy-duty trucks, and tractor units. Conducting R&D for Daimler Truck AG's global development and production network. | Motor Vehicle Manufacturing | 🇹🇷 Istanbul | 4,867 | 1967 |
| 24 | [BSH Ev Aletleri Türkiye](https://www.tamtam.ai/c/bsh-ev-aletleri-turkiye) (bsh-group.com)<br>A global white goods manufacturer with innovative products, 39 factories, and 80 companies in 50 countries, focusing on energy efficiency and innovation | Manufacturing | 🇹🇷 Istanbul | 4,579 | 1992 |
| 25 | [TEI - TUSAŞ Engine Industries, Inc.](https://www.tamtam.ai/c/tei-tusas-engine-industries-inc) (tei.com.tr)<br>A global design center and manufacturer in the aviation industry, specializing in producing high-quality engine parts and modules since 1985 | Aviation and Aerospace Component Manufacturing | 🇹🇷 Eskişehir | 4,460 | 1985 |
| 26 | [Yapı Merkezi Holding](https://www.tamtam.ai/c/yap-merkezi-holding) (yapimerkezi.com.tr)<br>An organization focused on creating and realizing construction projects globally with a commitment to quality, innovation, beauty, and respect for communities | Holding Companies | 🇹🇷 Istanbul | 4,231 | 1965 |
| 27 | [Hepsiburada (NASDAQ: HEPS)](https://www.tamtam.ai/c/hepsiburada-nasdaq-heps) (hepsiburada.com)<br>Leading e-commerce platform in Turkey with 50 million members and 1007k active merchants Offers vast selection, competitive prices, and efficient delivery services | Technology, Information and Internet | 🇹🇷 Istanbul | 4,036 | 1998 |
| 28 | [Baykar Technologies](https://www.tamtam.ai/c/baykar-technologies) (t.me)<br>Specializing in high-performance unmanned systems, we design, manufacture, and deliver UAVs and smart munitions for field operations, emphasizing innovation and multidisciplinary collaboration | Defense and Space Manufacturing | 🇹🇷 Istanbul | 4,025 | 1982 |
| 29 | [Atatürk Üniversitesi](https://www.tamtam.ai/c/ataturk-universitesi) (atauni.edu.tr)<br>The organization is a prominent university in Turkey with a rich history, offering a wide range of academic programs and research opportunities to a large student body | Higher Education | 🇹🇷 Erzurum | 3,856 | 1957 |
| 30 | [TEIAS](https://www.tamtam.ai/c/teias-ankara) (teias.gov.tr)<br>Leading electricity transmission operator in Turkey, integrating into international energy markets, expanding infrastructure, and operating in quality, economically, and reliably | Electric Power Transmission, Control, and Distribution | 🇹🇷 Ankara | 3,816 | 2001 |
| 31 | [HAVELSAN](https://www.tamtam.ai/c/havelsan) (havelsan.com)<br>Defense and information technology software integrator specializing in command systems, war management, simulation, autonomous platforms, cyber security, homeland security and e-government technologies. | Defense and Space Manufacturing | 🇹🇷 Çankaya | 3,634 | 1982 |
| 32 | [Yıldız Technical University](https://www.tamtam.ai/c/y-ld-z-teknik-universitesi) (edu.tr)<br>Established in 1911, an old and reputable Turkish university in Istanbul, offering various faculties and vocational schools for higher education to thousands of students. | Higher Education | 🇹🇷 Istanbul | 3,598 | 1911 |
| 33 | [Garanti BBVA Teknoloji](https://www.tamtam.ai/c/garanti-bbva-teknoloji) (garantibbvateknoloji.com.tr)<br>Provides technology infrastructure, software development, system management, security, and project management services for financial organizations with real-time operations. | IT Services and IT Consulting | 🇹🇷 Pendik | 3,451 |  |
| 34 | [Akdeniz University](https://www.tamtam.ai/c/akdeniz-university) (akdeniz.edu.tr)<br>Established in 1982, it provides education, research, and community services in various fields, contributing to the overall development of the region and the country | Higher Education | 🇹🇷 Antalya | 3,432 | 1982 |
| 35 | [Bosch Türkiye](https://www.tamtam.ai/c/bosch-turkiye) (bosch.com.tr)<br>A company operating in Turkey since 1910 with factories in Bursa, focusing on mobility, industrial technologies, consumer goods, energy, and building technologies | Industrial Machinery Manufacturing | 🇹🇷 Istanbul | 3,114 |  |
| 36 | [Kariyer.net](https://www.tamtam.ai/c/kariyer-net) (kariyer.net)<br>A leading online employment platform in Turkey connecting job seekers and employers through innovative technologies Over 28 million resumes available Serving nationwide with 400+ employees | Technology, Information and Internet | 🇹🇷 Istanbul | 3,014 | 1999 |
| 37 | [DEVA Holding A.Ş.](https://www.tamtam.ai/c/deva-holding-a-s) (deva.com.tr)<br>A leading pharmaceutical manufacturer specializing in human and veterinary medicine, cologne, and medical ampoule production, with a focus on innovation and global reach | Pharmaceutical Manufacturing | 🇹🇷 Istanbul | 2,977 | 1958 |
| 38 | [SASA](https://www.tamtam.ai/c/sasa-adana) (sasa.com.tr)<br>A leading manufacturer in the polyester industry, known for its strong technical heritage and innovative culture, with a focus on production and distribution processes | Chemical Manufacturing | 🇹🇷 Adana | 2,915 | 1966 |
| 39 | [Pamukkale Üniversitesi (PAÜ)](https://www.tamtam.ai/c/pamukkale-universitesi-pau) (pau.edu.tr)<br>Established in 1992 in Denizli, the organization is a leading university in the Aegean Region, offering a wide range of faculties, institutes, and research centers | Higher Education | 🇹🇷 Denizli | 2,881 | 1992 |
| 40 | [MARTUR FOMPAK International](https://www.tamtam.ai/c/martur-fompak-international) (marturfompak.com)<br>Design and manufacture of automotive seating systems, foam, and interior trim components for passenger cars and light commercial vehicles. | Motor Vehicle Manufacturing | 🇹🇷 Istanbul | 2,836 |  |
| 41 | [İstanbul Aydin University](https://www.tamtam.ai/c/istanbul-aydin-university) (aydin.edu.tr)<br>A university in Istanbul offering modern campus life, practical training, international opportunities, advanced technology access, and a focus on scientific research | Higher Education | 🇹🇷 Istanbul | 2,788 | 2003 |
| 42 | [Karel](https://www.tamtam.ai/c/karel) (karel.com.tr)<br>Leading technology firm in Türkiye excelling in defense industry, communication systems, automotive technologies, electronic production, and emerging technologies with a focus on innovation and R&D | Technology, Information and Internet | 🇹🇷 Istanbul | 2,666 | 1986 |
| 43 | [Mplus Türkiye](https://www.tamtam.ai/c/mplus-turkiye) (mplusgroup.eu)<br>Leading outsourcing provider offering CRM and AI-based solutions in 33 languages across Turkey and Europe, with a focus on customer management and satisfaction | Outsourcing and Offshoring Consulting | 🇹🇷 Istanbul | 2,650 | 2000 |
| 44 | [Nobel Ilac A.S](https://www.tamtam.ai/c/nobel-ilac-a-s) (nobel.com.tr)<br>A pharmaceutical organization developing and manufacturing a wide range of quality products for various health needs globally since 1964 | Pharmaceutical Manufacturing | 🇹🇷 Istanbul | 2,586 | 1964 |
| 45 | [Bilim İlaç](https://www.tamtam.ai/c/bilim-ilac) (bilimilac.com.tr)<br>A Turkish pharmaceutical company, ranking third in the industry, manufacturing and marketing strategic medicines with cutting-edge facilities and a focus on quality and innovation | Pharmaceutical Manufacturing | 🇹🇷 Beyoglu | 2,524 | 1953 |
| 46 | [Ondokuz Mayıs Üniversitesi](https://www.tamtam.ai/c/ondokuz-may-s-universitesi) (omu.edu.tr)<br>A university located on the coast of the Black Sea, established in 1975 with a campus overlooking the hills near the city center | Higher Education | 🇹🇷 Samsun | 2,507 | 1975 |
| 47 | [Toyota Motor Manufacturing Türkiye](https://www.tamtam.ai/c/toyota-motor-manufacturing-turkiye) (toyotatr.com)<br>Vehicle production base in Europe manufacturing Verso model Exports to 30+ countries, applying Toyota Production System for quality production Employs 3,000 people | Motor Vehicle Manufacturing | 🇹🇷 Arifiye | 2,505 | 1990 |
| 48 | [Colin's](https://www.tamtam.ai/c/colin-s) (colins.com.tr)<br>Global brand offering innovative, high quality and stylish clothing and products in over 600 stores across 26 countries Mission to make people feel good | Retail | 🇹🇷 Sarıyer | 2,500 | 1983 |
| 49 | [Koçtaş](https://www.tamtam.ai/c/koctas) (koctas.com.tr)<br>A leading home improvement retailer in Turkey, offering a wide range of products through physical stores, e-commerce, and mobile app for an enhanced customer experience | Retail | 🇹🇷 Istanbul | 2,446 |  |
| 50 | [DSI - General Directorate of State Hydraulic Works](https://www.tamtam.ai/c/dsi-general-directorate-of-state-hydraulic-works) (dsi.gov.tr)<br>Primary executive agency in Turkey responsible for managing surface and ground water for hydropower, irrigation, domestic, and industrial use since 1914 | Government Administration | 🇹🇷 Çankaya | 2,425 | 1914 |
| 51 | [Softtech](https://www.tamtam.ai/c/softtech) (softtech.com.tr)<br>A technology innovator with a focus on creating products that enhance quality of life, fostering in-house entrepreneurship, and supporting startups | IT Services and IT Consulting | 🇹🇷 Istanbul | 2,375 | 2006 |
| 52 | [Evyap](https://www.tamtam.ai/c/evyap) (evyap.com.tr)<br>A leading manufacturer of personal care and hygiene products, exporting to over 100 countries, known for quality soap, shower gels, skincare, and more | Manufacturing | 🇹🇷 Istanbul | 2,298 | 1927 |
| 53 | [Zorlu Holding](https://www.tamtam.ai/c/zorlu-holding) (zorlu.com.tr)<br>A diversified group with a strong corporate structure, operating in textile, electronics, energy, real estate, mining, and other sectors, focusing on sustainability and innovation | Investment Management | 🇹🇷 Istanbul | 2,283 | 1953 |
| 54 | [BMC Otomotiv San. ve Tic. A.Ş.](https://www.tamtam.ai/c/bmc-otomotiv-san-ve-tic-a-s) (bmc.com.tr)<br>A leading manufacturer of commercial and military vehicles, providing specialized solutions for automotive and defense industries with a wide product range and advanced manufacturing technology | Motor Vehicle Manufacturing | 🇹🇷 Izmir | 2,266 | 1964 |
| 55 | [OTOKAR Otomotiv ve Savunma Sanayi A.Ş.](https://www.tamtam.ai/c/otokar-otomotiv-ve-savunma-sanayi-a-s) (otokar.com.tr)<br>A Turkish company offers custom solutions in mass transportation, logistics, and defense industries, producing buses, armored vehicles, and tower systems with proprietary technology | Motor Vehicle Manufacturing | 🇹🇷 Sakarya | 2,260 |  |
| 56 | [TÜBİTAK BİLGEM](https://www.tamtam.ai/c/tubitak-bilgem) (en.bilgem.tubitak.gov.tr)<br>A national R&D center specializing in information security, advanced electronics, and IT technologies through strategic partnerships, developing high-value technologies and products for competitiveness | Research Services | 🇹🇷 Gebze | 2,230 | 2010 |
| 57 | [NTT DATA Business Solutions Turkey](https://www.tamtam.ai/c/ntt-data-business-solutions-turkey) (nttdata-solutions.com)<br>NTT DATA Business Solutions provides technology services worldwide, specializing in digital transformation, innovation, and developing solutions in collaboration with industry leaders | IT Services and IT Consulting | 🇹🇷 Ataşehir | 2,227 |  |
| 58 | [University of Health Sciences](https://www.tamtam.ai/c/university-of-health-sciences) (sbu.edu.tr)<br>Turkey's first state university focused on health issues | Higher Education | 🇹🇷 Selimiye | 2,184 | 2015 |
| 59 | [Firat University](https://www.tamtam.ai/c/firat-university) (firat.edu.tr)<br>Established in 1975, this institution offers education in various regions, boasting a rich cultural life and ownership of multiple higher education institutions | Higher Education | 🇹🇷 Elâzığ | 2,133 | 1975 |
| 60 | [Eskişehir Osmangazi Üniversitesi](https://www.tamtam.ai/c/eskisehir-osmangazi-universitesi) (ogu.edu.tr)<br>A higher education institution located in Eskişehir, Turkey, offering a variety of academic programs and research opportunities | Higher Education | 🇹🇷 Eskişehir | 2,133 | 1970 |
| 61 | [Innova](https://www.tamtam.ai/c/innova-istanbul) (innova.com.tr)<br>Leading Turkish IT solutions provider with 1400 professionals offering platform-independent solutions in various sectors, exporting solutions to 33 countries across 3 continents | IT Services and IT Consulting | 🇹🇷 Istanbul | 2,115 | 1999 |
| 62 | [Beko Global](https://www.tamtam.ai/c/beko-global) (beko.com)<br>Global consumer durables and electronics company with 15 production facilities worldwide, entering US market with a focus on fast growth and market leadership | Manufacturing | 🇹🇷 Istanbul | 2,112 | 1955 |
| 63 | [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 |
| 64 | [İstanbul Üniversitesi-Cerrahpaşa](https://www.tamtam.ai/c/istanbul-universitesi-cerrahpasa) (iuc.edu.tr)<br>Educational institution developing well-rounded individuals to meet societal needs | Higher Education | 🇹🇷 Istanbul | 2,020 | 1453 |
| 65 | [Architecht](https://www.tamtam.ai/c/architecht) (architecht.com)<br>Specializing in financial technologies, our subsidiary of a leading participation bank offers innovative solutions for banking, security, and software development globally | IT Services and IT Consulting | 🇹🇷 Teknopark İstanbul | 2,012 | 2015 |
| 66 | [Özdilek Holding](https://www.tamtam.ai/c/ozdilek-holding) (ozdilekholding.com.tr)<br>A leading organization with over 50 years of experience, specialized in home textiles production, retail, entertainment, energy, e-commerce, food, construction, and more | Holding Companies | 🇹🇷 Bursa | 1,972 | 1971 |
| 67 | [Dicle Elektrik](https://www.tamtam.ai/c/dicle-elektrik) (dedas.com.tr)<br>We provide electricity distribution services to a population of approximately 6 million in southeastern Turkey, with an extensive network and technological innovations for reliable supply | Electric Power Transmission, Control, and Distribution | 🇹🇷 Diyarbakır | 1,933 | 2013 |
| 68 | [Sanovel İlaç](https://www.tamtam.ai/c/sanovel-ilac) (sanovel.com.tr)<br>Leading pharmaceutical company in Türkiye with global aspirations, boasting extensive R&D, diverse product portfolio, FDA approval, and commitment to lifelong health worldwide | Pharmaceutical Manufacturing | 🇹🇷 River Plaza Kat:10 Levent | 1,921 | 1983 |
| 69 | [Başakşehir Çam ve Sakura City Hospital](https://www.tamtam.ai/c/basaksehir-cam-ve-sakura-city-hospital) (camsakurasehir.saglik.gov.tr)<br>Provides quality health services prioritizing healthy life, through scientific diagnosis and treatment while focusing on ethics, satisfaction, trust, and medical education | Hospitals and Health Care | 🇹🇷 Istanbul | 1,907 | 2021 |
| 70 | [Intertech Information Technology and Marketing Inc.](https://www.tamtam.ai/c/intertech-information-technology-and-marketing-inc) (intertech.com.tr)<br>Established in 1987, this tech company provides innovative IT solutions for finance and banking industries globally, offering a wide range of products and services | IT Services and IT Consulting | 🇹🇷 Istanbul | 1,895 | 1987 |
| 71 | [Beyçelik Gestamp](https://www.tamtam.ai/c/beycelik-gestamp) (beycelikgestamp.com.tr)<br>Innovative automotive company specializing in chassis components, body frames, metal parts, and molds, prioritizing safety, energy efficiency, and environmental production with a dedicated workforce | Motor Vehicle Parts Manufacturing | 🇹🇷 | 1,861 | 1976 |
| 72 | [Ziraat Teknoloji](https://www.tamtam.ai/c/ziraat-teknoloji) (ziraatteknoloji.com)<br>One of Turkey's leading IT companies providing banking solutions and IT services to public organizations and companies worldwide | IT Services and IT Consulting | 🇹🇷 Esenler | 1,809 | 2001 |
| 73 | [Logo Yazılım](https://www.tamtam.ai/c/logo-yaz-l-m) (logo.com.tr)<br>Leading provider of business software solutions supporting sustainable success of businesses across various industries, offering a wide range of products and services globally with a focus on digital transformation | Software Development | 🇹🇷 Kocaeli | 1,801 | 1984 |
| 74 | [Metro Istanbul](https://www.tamtam.ai/c/metro-istanbul) (metro.istanbul)<br>Operates and expands urban rail systems in Istanbul, providing efficient transportation services, maintenance, and engineering consultancy for future projects domestically and internationally | Rail Transportation | 🇹🇷 Yavuz Selim | 1,799 | 1988 |
| 75 | [Norm Holding](https://www.tamtam.ai/c/norm-holding) (normholding.com)<br>Established in 1973, the company began producing bolts with a strong commitment to innovation and quality, evolving into a leading partner for industrial solutions | Holding Companies | 🇹🇷 Çiğli | 1,783 | 2017 |
| 76 | [İstinye Üniversitesi](https://www.tamtam.ai/c/istinye-universitesi) (istinye.edu.tr)<br>Our vision is to share academic knowledge nationally and internationally, while guiding the academic world with science to lead society towards a brighter future Our mission focuses on promoting human values in research, education, and contributing to global society | Higher Education | 🇹🇷 Istanbul | 1,774 | 2015 |
| 77 | [Eti Bakır A.Ş.](https://www.tamtam.ai/c/eti-bak-r-a-s) (etibakir.com.tr)<br>Specializing in copper production, the company operates facilities for refining, electrolytic copper cathode production, and metal mining and processing, contributing significantly to the national economy | Mining | 🇹🇷 Türkiye | 1,772 | 1974 |
| 78 | [Koç Üniversitesi Hastanesi](https://www.tamtam.ai/c/koc-universitesi-hastanesi) (kuh.ku.edu.tr)<br>Providing high-quality, transparent, and integrated patient care services while complying with laws and ethical principles, with a focus on patient needs and privacy | Hospitals and Health Care | 🇹🇷 Istanbul | 1,658 | 2010 |
| 79 | [Okan University](https://www.tamtam.ai/c/okan-university) (okan.edu.tr)<br>Dynamic university offering undergraduate and graduate programs in various fields with a focus on university-business cooperation and practical skills for professional life | Higher Education | 🇹🇷 Istanbul | 1,641 | 1999 |
| 80 | [Kordsa](https://www.tamtam.ai/c/kordsa) (kordsa.com)<br>A global leader in reinforcement technologies, with expertise in tire, construction, and composite reinforcement materials and processes | Textile Manufacturing | 🇹🇷 İzmit | 1,636 |  |
| 81 | [Etiya](https://www.tamtam.ai/c/etiya) (etiya.com)<br>Etiya specializes in AI-driven digital transformation, offering innovative solutions for various sectors, enhancing customer experience with agile methodologies and microservices. | Software Development | 🇹🇷 Istanbul | 1,570 | 2004 |
| 82 | [Kastamonu Entegre](https://www.tamtam.ai/c/kastamonu-entegre) (kastamonuentegre.com)<br>A global leader in wood-based panel manufacturing, with production facilities across multiple countries, focusing on sustainability and innovation through R&D | Paper and Forest Product Manufacturing | 🇹🇷 Istanbul | 1,565 | 1969 |
| 83 | [DUZCE UNIVERSITESI](https://www.tamtam.ai/c/duzce-universitesi) (duzce.edu.tr)<br>The organization originated as a vocational school in 1976 and evolved into a university with multiple faculties and campuses | Higher Education | 🇹🇷 Düzce | 1,547 |  |
| 84 | [sahibinden.com](https://www.tamtam.ai/c/sahibinden-com) (sahibinden.com)<br>An innovative technology company under Aksoy Group, sahibindencom is Turkey's leading electronic commerce and advertising platform, promoting environmental sustainability through second-hand sales | Software Development | 🇹🇷 Ataşehir | 1,545 | 2000 |
| 85 | [STM](https://www.tamtam.ai/c/stm) (stm.com.tr)<br>Provides high technology project management, engineering, and consultancy services for military systems, developing domestic software and platforms for defense industry procurement operations. | Defense and Space Manufacturing | 🇹🇷 Ankara | 1,537 | 1991 |
| 86 | [Karsan Automotive](https://www.tamtam.ai/c/karsan-automotive) (karsan.com)<br>A leading player in the Turkish automotive industry, specializing in producing commercial vehicles, including electric and autonomous models for global markets | Motor Vehicle Manufacturing | 🇹🇷 Bursa | 1,531 | 1966 |
| 87 | [İstanbul Gelişim Üniversitesi](https://www.tamtam.ai/c/istanbul-gelisim-universitesi) (gelisim.edu.tr)<br>Higher education institution offering various programs accredited by international organizations, aiming to become a global university with a focus on success and internationalization | Higher Education | 🇹🇷 Istanbul | 1,528 | 2008 |
| 88 | [TEMSA](https://www.tamtam.ai/c/temsa) (temsa.com)<br>Innovative producer of buses, midibuses, and light trucks focused on smart, sustainable mobility solutions for enjoyable journeys worldwide | Motor Vehicle Manufacturing | 🇹🇷 Adana | 1,521 |  |
| 89 | [TürkTraktör](https://www.tamtam.ai/c/turktraktor) (turktraktor.com.tr)<br>Leading manufacturer in Turkey with exports to 130+ countries, specializing in farming tractors and agricultural equipment, backed by a strong partnership and advanced R&D center | Motor Vehicle Manufacturing | 🇹🇷 Yenimahalle | 1,516 | 1954 |
| 90 | [Yazaki Türkiye](https://www.tamtam.ai/c/yazaki-turkiye) (yazaki-europe.com)<br>A pioneering organization specializing in automotive wiring harnesses and various energy products to support a safe and environmentally friendly society | Motor Vehicle Manufacturing | 🇹🇷 Nilüfer | 1,512 |  |
| 91 | [CMS Group Light Alloy Wheels](https://www.tamtam.ai/c/cms-group-light-alloy-wheels) (cms.com.tr)<br>Manufacturer of high quality wheels, utilizing advanced engineering technology and 50 years of molding experience Market leader in Turkey, top 5 in Europe, exporting 85% of production | Motor Vehicle Manufacturing | 🇹🇷 Izmir | 1,505 |  |
| 92 | [Orhan Holding](https://www.tamtam.ai/c/orhan-holding) (orhanholding.com)<br>Global supplier in automotive industry with manufacturing plants and technical centers worldwide offering various products including fluid transfer systems, exhaust systems, and automotive seating | Motor Vehicle Manufacturing | 🇹🇷 Bursa | 1,455 | 1972 |
| 93 | [ADF](https://www.tamtam.ai/c/adf) (adfmuhendislik.com)<br>Specializing in aviation, aerospace, robotics, and renewable energy technologies, we provide high-quality training materials to technical schools and universities since 2015 | Technical and Vocational Training | 🇹🇷 Levent | 1,439 | 2015 |
| 94 | [Eastern Mediterranean University](https://www.tamtam.ai/c/eastern-mediterranean-university) (emu.edu.tr)<br>Providing sustainable and quality education at international standards, conducting research, contributing to society, and fostering multicultural diversity and competencies | Higher Education | 🇹🇷 Mersin | 1,435 | 1979 |
| 95 | [WORLD MEDICINE TÜRKİYE](https://www.tamtam.ai/c/world-medicine-turkiye) (worldmedicine.com.tr)<br>A pharmaceutical organization based in Turkey with a wide portfolio of products in various medical fields, exporting to over 35 countries worldwide | Pharmaceutical Manufacturing | 🇹🇷 Güneşli | 1,430 | 2011 |
| 96 | [Brisa Bridgestone Sabanci](https://www.tamtam.ai/c/brisa-bridgestone-sabanci) (brisa.com.tr)<br>A leading player in the tire industry with strong domestic and international presence, focusing on innovation, sustainability, and technological advancements | Motor Vehicle Manufacturing | 🇹🇷 Istanbul | 1,414 |  |
| 97 | [Neutec İlac](https://www.tamtam.ai/c/neutec-ilac) (neutec.com.tr)<br>Official LinkedIn page for a pharmaceutical company specializing in medication | Pharmaceutical Manufacturing | 🇹🇷 Istanbul | 1,387 |  |
| 98 | [Üsküdar University](https://www.tamtam.ai/c/uskudar-university) (uskudar.edu.tr)<br>Specializing in behavioral science, this organization aims to produce knowledge, projects, and academic work at global standards while developing resources and fostering collaborations | Education Administration Programs | 🇹🇷 Istanbul | 1,384 | 2011 |
| 99 | [Bezmialem Vakif University](https://www.tamtam.ai/c/bezmialem-vakif-university) (bezmialem.edu.tr)<br>A prestigious institution offering top-quality education and healthcare services, with a focus on medical research and practical training for students | Higher Education | 🇹🇷 Istanbul (Europe) | 1,378 | 1845 |
| 100 | [Izmir University of Economics](https://www.tamtam.ai/c/izmir-university-of-economics) (ieu.edu.tr)<br>A higher education institution founded by Izmir Chamber of Commerce Health and Education Foundation, offering various academic programs | Higher Education | 🇹🇷 Izmir | 1,346 | 2001 |

## 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 Turkey

- [The largest companies in Turkey](https://www.tamtam.ai/l/largest-companies-turkey) (3,556)
- [Multinational companies in Turkey](https://www.tamtam.ai/l/multinational-companies-turkey) (790)
- [Manufacturers in Turkey](https://www.tamtam.ai/l/manufacturers-turkey) (762)
- [Retail chains in Turkey](https://www.tamtam.ai/l/retail-chains-turkey) (376)
- [Companies with a mobile app in Turkey](https://www.tamtam.ai/l/companies-with-mobile-app-turkey) (312)
- [Corporate groups and holding companies in Turkey](https://www.tamtam.ai/l/holding-companies-turkey) (304)
- [Critical infrastructure operators in Turkey](https://www.tamtam.ai/l/critical-infrastructure-operators-turkey) (282)
- [Public sector organisations in Turkey](https://www.tamtam.ai/l/public-sector-organisations-turkey) (227)
- [Hardware manufacturers in Turkey](https://www.tamtam.ai/l/hardware-companies-turkey) (224)
- [Energy companies in Turkey](https://www.tamtam.ai/l/energy-companies-turkey) (197)
- [Food and beverage companies in Turkey](https://www.tamtam.ai/l/food-and-beverage-companies-turkey) (197)
- [Consumer goods companies in Turkey](https://www.tamtam.ai/l/consumer-goods-companies-turkey) (193)
- [Food and Beverage Manufacturing companies in Turkey](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-turkey) (184)
- [Hotel and hospitality groups in Turkey](https://www.tamtam.ai/l/hospitality-groups-turkey) (176)
- [E-commerce companies in Turkey](https://www.tamtam.ai/l/ecommerce-companies-turkey) (172)
- [Higher Education companies in Turkey](https://www.tamtam.ai/l/higher-education-companies-turkey) (158)
- [Food and Beverage Services companies in Turkey](https://www.tamtam.ai/l/food-and-beverage-services-companies-turkey) (149)
- [Family-owned companies in Turkey](https://www.tamtam.ai/l/family-owned-companies-turkey) (137)
- [Financial services firms in Turkey](https://www.tamtam.ai/l/financial-services-firms-turkey) (134)
- [Motor Vehicle Manufacturing companies in Turkey](https://www.tamtam.ai/l/motor-vehicle-manufacturing-companies-turkey) (134)
- [Publicly traded companies in Turkey](https://www.tamtam.ai/l/publicly-traded-companies-turkey) (131)
- [Construction companies in Turkey](https://www.tamtam.ai/l/construction-companies-turkey) (129)
- [Automotive manufacturers and suppliers in Turkey](https://www.tamtam.ai/l/automotive-companies-turkey) (128)
- [IT Services and IT Consulting companies in Turkey](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-turkey) (123)

## The same list elsewhere in Turkey

- [Companies with in-house R&D in Istanbul](https://www.tamtam.ai/l/r-and-d-companies-istanbul) (177)
- [Companies with in-house R&D in Ankara](https://www.tamtam.ai/l/r-and-d-companies-ankara) (48)

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