| # | Company | Employees |
|---|---|---|
| 1 |
Hacettepe Universityhacettepe.edu.tr
A prestigious institution offering education, research, and public services in various fields such as health sciences, medicine, and technology |
7,772 |
| 2 |
Ankara Universityankara.edu.tr
An institution embedded in the history and mission of the Republic, promoting modern science, democratic values, and enlightenment nationwide |
7,675 |
| 3 |
Gazi Universitygazi.edu.tr
Public university based in Ankara, Turkey, established in 1926, offering various academic programs in fields such as education, engineering, economics, and architecture |
6,308 |
| 4 |
ROKETSANroketsan.com.tr
Designing, developing, manufacturing rockets and missiles as a leading national institution focused on defense industry advancements. |
6,196 |
| 5 |
Orta Doğu Teknik Üniversitesi / Middle East Technical Universitymetu.edu.tr
A leading public technical university in Ankara, Turkey, with a focus on research and a diverse international student population |
5,301 |
| 6 |
TÜBİTAKtubitak.gov.tr
Leading autonomous research council in Turkey, advancing science and technology through funding, conducting research, and supporting researchers to promote national development and innovation |
4,911 |
| 7 |
TEIASteias.gov.tr
Leading electricity transmission operator in Turkey, integrating into international energy markets, expanding infrastructure, and operating in quality, economically, and reliably |
3,816 |
| 8 |
dhmidhmi.gov.tr
The organization is responsible for managing Turkish airports, regulating air traffic in Turkish airspace, and providing various aviation services in compliance with international standards |
3,473 |
| 9 |
Anadolu Ajansıaa.com.tr
Global news agency providing coverage of world affairs in 13 languages for over a century, with specialized desks focusing on critical issues |
3,364 |
| 10 |
Ptt AŞptt.gov.tr
A leading institution in Turkey offering efficient postal, banking, and logistics services with a focus on quality, reliability, and customer satisfaction |
3,191 |
| 11 |
Ankara City Hospitalankarasehir.saglik.gov.tr
A leading healthcare provider with a state-of-the-art 4190 bed capacity hospital offering specialized medical services in various fields |
3,078 |
| 12 |
BOTAŞbotas.gov.tr
A leading energy organization in Turkey focusing on oil and natural gas operations, LNG terminals, international transportation projects, and environmental sustainability |
2,180 |
| 13 |
Central Bank of the Republic of Türkiyetcmb.gov.tr
Responsible for regulating monetary and exchange rate policies, ensuring banknote circulation, and maintaining price stability in Turkey. |
2,060 |
| 14 |
EÜAŞ, (Elektrik Üretim Anonim Şirketi)euas.gov.tr
A state-owned entity responsible for operating thermal and hydraulic power plants, ensuring power supply security and building new plants when approved |
1,862 |
| 15 |
Makine ve Kimya Endüstrisi A.Ş.mke.gov.tr
A longstanding organization specializing in defense industry products, providing high-quality weapons, ammunition, and military equipment, aiming to enhance Turkey's defense capabilities |
1,800 |
| 16 |
Ankara Yıldırım Beyazıt Üniversitesiaybu.edu.tr
Transitioning from the past to the future, paving the way for innovation and progress with a focus on continuous improvement |
1,776 |
| 17 |
Türk Standardları Enstitüsütse.org.tr
Development and enforcement of national standards for products, services, and procedures under government oversight and legal framework. |
1,560 |
| 18 |
Türkiye Cumhuriyeti Devlet Demiryolları (TCDD)tcdd.gov.tr
Turkish state-owned railway entity under the Ministry of Transport and Communications, overseeing operations and infrastructure within the country |
1,534 |
| 19 |
TCDD Taşımacılık A.Ş.gov.tr
Established in 2016 under Turkish Railway Liberalization Law, the company provides freight and passenger transportation services on national railway infrastructure |
1,447 |
| 20 |
TCDD Teknik Mühendislik ve Müşavirlik A.Ş.tcddteknik.com.tr
A government-owned engineering firm specializing in engineering, consultancy, technology, signaling, energy, certification, and measurement services in various fields |
1,361 |
| 21 |
Ankara Hacı Bayram Veli Universityhacibayram.edu.tr
Ankara-based educational institution providing a range of academic programs and opportunities for students to pursue their higher education goals |
1,088 |
| 22 |
Turkish Electricity Distribution Corporation (TEDAŞ)tedas.gov.tr
Official page of a Turkish electricity distribution corporation providing essential services in the energy sector to customers and communities |
924 |
| 23 |
Union of Turkish Bar Associationsbarobirlik.org.tr
An organization advancing legal profession by maintaining ethics, providing support to lawyers, ensuring professional development, and protecting rule of law |
779 |
| 24 |
Bilgi Teknolojileri ve İletişim Kurumu - BTK - ICTbtk.gov.tr
Regulating and overseeing the telecommunication sector in Turkey, ensuring liberalization, competition, and sustainable growth through policy establishment and regulation functions |
704 |
| 25 |
State Supply Office Of Turkeydmo.gov.tr
Central procurement organization for public institutions, ensuring efficient use of public resources by transparently sourcing and distributing goods/services with competitive pricing and quality standards nationwide |
671 |
| 26 |
General Directorate of Mineral Research and Exploration | MTAmta.gov.tr
A research organization providing mineral exploration services, geological research, geophysical surveys, technological research, and marine and environmental research |
592 |
| 27 |
TURKIYE SEKER FABRIKALARI A Sturkseker.gov.tr
An Ankara-based organization specializing in the production of sugar, operating from Mithatpasa Caddesi in Turkey |
592 |
| 28 |
TOPRAK MAHSULLERİ OFİSİ GENEL MÜDÜRLÜĞÜtmo.gov.tr
An economically autonomous state entity, fully owned by the government since 1938, operating under specific regulations, with limited liability based on its capital |
438 |
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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.