The companies listed here are primarily large, established firms based in Istanbul, with a strong presence in the financial sector. Banking institutions like Garanti BBVA, Yapı Kredi, and QNB Türkiye offer a range of financial products and services, often with a focus on digital solutions. Other significant players include Turkish Airlines, a major airline, and Turkcell, a telecommunications provider.
A notable pattern among these companies is their concentration in Istanbul, serving as headquarters for diverse industries. Beyond finance, the list includes prominent retail companies such as Migros Ticaret, offering groceries and household items, and Koton, a global fashion retailer. The presence of technology firms like Yemeksepeti, an online food delivery platform, and Hepsiburada, an e-commerce platform, indicates a growing digital economy.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Turkish Airlinesturkishairlines.com
A leading airline offering unrivaled flight network, young fleet, and elevated travel experience, flying to over 340 destinations worldwide |
39,555 | |||
| 2 |
Migros Ticaretmigroskurumsal.com
Leading modern retail, offering groceries, goods, and household items, committed to customer satisfaction, employee development, and technological advancement for seven decades. |
18,919 | |||
| 3 |
Garanti BBVAgarantibbva.com.tr
Digital and people-focused financial institution offering innovative products and services, part of a global banking group, aiming to provide advanced solutions and opportunities for customers |
16,695 | |||
| 4 |
Yapı Krediyapikredi.com.tr
A leading financial institution in Turkey offering a wide range of banking and financial services to individuals, SMEs, and corporations |
16,484 | |||
| 5 |
Turkcellturkcell.com.tr
A converged telecommunication and technology services provider based in Turkey, offering voice, data, TV, and value-added services on mobile and fixed networks globally |
16,035 | |||
| 6 |
QNB Türkiyeqnb.com.tr
Established in 1987, the company is a leading bank in Turkey with innovative services like the first installment credit card and online banking platform |
13,575 | |||
| 7 |
VakıfBankvakifbank.com.tr
Established in 1954, the organization offers a wide range of modern banking products and services, specializing in corporate, commercial, and retail banking, along with investment banking and capital market activities |
11,881 | |||
| 8 |
Acibadem Healthcare Groupacibadem.com.tr
Leading healthcare services, hospitals, and clinics, providing diagnosis, treatment, and integrated medical solutions across multiple countries, including mobile healthcare and project management. |
9,234 | |||
| 9 |
TEBteb.com.tr
A respected finance institution in Turkish banking sector, offering a wide range of banking services and products with international partnership for growth and expansion |
8,632 | |||
| 10 |
Kuveyt Turk Participation Bankkuveytturk.com.tr
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 |
6,740 | |||
| 11 |
Enerjisaenerjisa.com.tr
Leading in electricity distribution and sales, providing services to millions of customers, investing in sustainability, creating value for partners and community |
5,364 | |||
| 12 | 5,321 | ||||
| 13 |
Yemeksepetiyemeksepeti.com
The company is Turkey's largest online food delivery platform, also offering online market services and a platform for food-related content and recipes |
4,667 | |||
| 14 |
Aras Kargoaraskargo.com.tr
A logistics and distribution business established in 1979, with a wide-reaching network in Turkey, offering innovative and quality delivery services |
4,068 | |||
| 15 |
Hepsiburada (NASDAQ: HEPS)hepsiburada.com
Leading e-commerce platform in Turkey with 50 million members and 1007k active merchants Offers vast selection, competitive prices, and efficient delivery services |
4,036 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Türkiye Finansturkiyefinans.com.tr
A pioneer in Islamic banking in Turkey, providing commercial and retail services with a focus on customer satisfaction and digital innovation |
4,019 | |||
| 17 |
Yurtici Kargoyurticikargo.com
A leading cargo service provider in Turkey and worldwide, with a large network of branches, employees, vehicles, and international partnerships |
3,832 | |||
| 18 |
Gratisgratis.com
A leading personal care retailer with over 700 stores nationwide, offering a wide range of products in 15 categories and beauty services in 40+ locations |
3,822 | |||
| 19 |
Albaraka Türk Katılım Bankası A.Şalbaraka.com.tr
Established in 1984, it offers interest-free financial services based on profit and loss sharing, with a global reach through a vast network of correspondent banks |
3,388 | |||
| 20 |
Vakıf Katılımvakifkatilim.com.tr
Leading the way in participatory banking, our vision is to be a reference institution, while our mission is to drive growth through Islamic banking principles |
3,016 | |||
| 21 |
AgeSA Hayat ve Emeklilikagesa.com.tr
A company in partnership with Sabancı Holding and Ageas, offering a wide range of individual and group retirement plans, life insurance products for individuals and families |
2,897 | |||
| 22 |
ACUNMEDYAacunmedya.com
International production and broadcasting group producing popular TV formats worldwide, including reality shows and competitions, with own sports-reality format and TV channels |
2,812 | |||
| 23 |
Karacakaraca.com
A multinational group with 11 brands, operating in 43 countries with a wide range of products from dinnerware to small household appliances |
2,781 | |||
| 24 |
Anadolu Sigortaanadolusigorta.com.tr
Offers diverse insurance products excluding life insurance, emphasizing expertise, technology, strong capital, and customer-focused service across Turkey. |
2,694 | |||
| 25 |
ING Türkiyeing.com.tr
The company provides effortless banking to empower people who live authentically, pursue their dreams, and embrace innovation and equality |
2,652 | |||
| 26 |
Pronet Security Servicespronet.com.tr
Leading electronic security provider in Turkey, offering innovative residential and commercial solutions with a nationwide service network and a focus on customer satisfaction |
2,599 | |||
| 27 |
Koçtaşkoctas.com.tr
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 |
2,446 | |||
| 28 |
Eminevimeminevim.com
A pioneering company in the savings finance sector, providing opportunities for individuals to become vehicle owners through a unique concept |
2,416 | |||
| 29 |
Watsons Turkeywatsons.com.tr
Leading health and beauty retailer operating over 8,000 stores in Asia and Europe, offering personalized advice and a wide product range |
2,194 | |||
| 30 |
Amerikan Hastanesiamerikanhastanesi.org
A leading healthcare center in Turkey and neighboring countries, providing modern medical services since 1920 with a non-profit approach |
2,160 | |||
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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 Nov 11, 2026.
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- Hotel and hospitality groups in Istanbul 73
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- IT services companies in Istanbul 50
- Financial Services companies in Istanbul 47
- Hospitals and Health Care companies in Istanbul 46