# Multinational companies headquartered in Athens
Tamtam tracks 74 multinational companies headquartered in Athens. This list ranks the 30 largest by number of employees on LinkedIn, led by Consolidated Contractors Company, OTE Group of Companies (HTO) and Eurobank. Their median headcount is 1,186. Half of them were founded in 1958 or later.
These multinational companies in Athens are mostly large, well-established firms with significant employee counts. Consolidated Contractors Company specializes in construction, OTE Group of Companies provides telecommunications services, Eurobank and National Bank of Greece are prominent financial institutions, and Kaizen Gaming focuses on online gaming experiences. PPC S.A. is a leading electric utility.
The companies listed show a strong presence of the financial sector, with Eurobank, National Bank of Greece, and Alpha Bank all founded before 1990. The construction industry is also well-represented by Consolidated Contractors Company and GEK TERNA Group of Companies. Many of these firms, such as OTE Group of Companies and PPC S.A., are key players in their respective Greek markets.
๐ฌ๐ท Athens ยท 30 companies ยท Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Consolidated Contractors Company](https://www.tamtam.ai/c/consolidated-contractors-company) (ccc.net)
A leading international entity specializing in construction, engineering, procurement, development, and investment, committed to providing reliable services while prioritizing client satisfaction and environmental responsibility | Construction | ๐ฌ๐ท Athens | 17,253 | |
| 2 | [OTE Group of Companies (HTO)](https://www.tamtam.ai/c/ote-group-of-companies-hto) (cosmote.gr)
A leading technology company in Greece, part of Deutsche Telekom Group, providing a wide range of telecom services and ICT solutions for digital transformation and growth | Telecommunications | ๐ฌ๐ท Athens | 7,648 | |
| 3 | [Eurobank](https://www.tamtam.ai/c/eurobank) (eurobank.gr)
A strong financial organization offering a wide range of products and services in banking and financial sectors, focusing on social responsibility and sustainability | Financial Services | ๐ฌ๐ท Athens | 6,916 | 1990 |
| 4 | [National Bank of Greece](https://www.tamtam.ai/c/national-bank-of-greece) (nbg.gr)
A bank with a rich history and a promising future, offering stability, expertise, digital services, and a strong presence in Greece and abroad | Banking | ๐ฌ๐ท Athens | 5,473 | 1841 |
| 5 | [Alpha Bank](https://www.tamtam.ai/c/alpha-bank) (alpha.gr)
Enabling progress in life and business through integrated finance, supporting businesses in the green and digital economy, fostering inclusive progress for people and communities. | Banking | ๐ฌ๐ท Athens | 5,173 | 1879 |
| 6 | [Kaizen Gaming](https://www.tamtam.ai/c/kaizen-gaming) (careers.kaizengaming.com)
A rapidly growing GameTech company operating in 13 countries, focused on technology and providing trusted online gaming experiences to customers worldwide | Entertainment Providers | ๐ฌ๐ท Athens | 3,249 | |
| 7 | [PPC S.A.](https://www.tamtam.ai/c/ppc-s-a) (ppcgroup.com)
Leading Greek electric utility in power generation, distribution, and supply, focusing on decarbonization, digitalization, renewables, and customer-centric growth, with significant market presence and assets | Utilities | ๐ฌ๐ท Athens | 2,980 | 1950 |
| 8 | [National & Kapodistrian University of Athens](https://www.tamtam.ai/c/national-and-kapodistrian-university-of-athens) (en.uoa.gr)
A prestigious public university in Athens, Greece, offering a wide range of academic programs and conducting extensive research in various fields | Higher Education | ๐ฌ๐ท Athens | 2,094 | 1837 |
| 9 | [FAMAR](https://www.tamtam.ai/c/famar) (famar-group.com)
European contract manufacturing and development partner specializing in pharmaceutical and healthcare products, offering flexible solutions from development to distribution. | Pharmaceutical Manufacturing | ๐ฌ๐ท Athens | 1,898 | 1949 |
| 10 | [Cosmote eValue](https://www.tamtam.ai/c/cosmote-evalue) (cosmote-evalue.gr)
A customer experience and relationship initiatives provider with 25 years of experience, operating in 20+ countries with a team of 7,000 members | Outsourcing and Offshoring Consulting | ๐ฌ๐ท Athens | 1,843 | 1999 |
| 11 | [Frigoglass](https://www.tamtam.ai/c/frigoglass) (frigoglass.com)
Global leader in ice cold merchandisers and glass packaging, providing bespoke coolers and sustainable refrigeration solutions to beverage brands worldwide | Appliances, Electrical, and Electronics Manufacturing | ๐ฌ๐ท Athens | 1,743 | 1996 |
| 12 | [Aktor Group](https://www.tamtam.ai/c/aktor-group) (intrakat.gr)
A leading international infrastructure provider offering construction, photovoltaic parks, quarry management, technical facilities, and project management services with extensive experience and expertise | Holding Companies | ๐ฌ๐ท Athens | 1,546 | 1950 |
| 13 | [GEK TERNA Group of Companies](https://www.tamtam.ai/c/gek-terna-group-of-companies) (gekterna.com)
A leading business group in Greece with a global presence, specializing in infrastructure, energy production, waste management, and real estate development | Construction | ๐ฌ๐ท Athens | 1,476 | 1969 |
| 14 | [OPAP](https://www.tamtam.ai/c/opap) (allwyn.gr)
A leading gaming organization in Greece, offering lotteries, sports betting, horseracing, instant win games, VLTs, and promoting Responsible Gaming | Entertainment Providers | ๐ฌ๐ท Athens | 1,355 | 1958 |
| 15 | [THENAMARIS](https://www.tamtam.ai/c/thenamaris) (thenamaris.com)
Global ship manager operating diverse high-specification ocean-going vessels with a focus on safe, efficient, and profitable management services worldwide | Maritime Transportation | ๐ฌ๐ท Athens | 1,186 | 1970 |
| 16 | [Uni Systems](https://www.tamtam.ai/c/uni-systems) (unisystems.com)
An established ICT partner with over 60 years of experience, providing innovative solutions to European and international organizations in various sectors | IT Services and IT Consulting | ๐ฌ๐ท Athens | 1,100 | 1964 |
| 17 | [University of Athens](https://www.tamtam.ai/c/university-of-athens) (uoa.gr)
Oldest university in Southeast Europe, established in 1837, offering a wide range of educational programs and ranked 200th in the world | Research Services | ๐ฌ๐ท Athens | 1,098 | 1837 |
| 18 | [PeopleCert](https://www.tamtam.ai/c/peoplecert) (peoplecert.org)
Global leader in delivering exams and accreditation services worldwide, enabling individuals to achieve their full potential through learning and exams | Education Administration Programs | ๐ฌ๐ท Athens | 951 | 2000 |
| 19 | [KPMG Greece](https://www.tamtam.ai/c/kpmg-greece) (kpmg.com)
Offering audit, tax, legal, and advisory services to businesses in Greece and abroad Over 800 professionals with specialized expertise ISO certified | Accounting | ๐ฌ๐ท Athens | 880 | 1971 |
| 20 | [scania](https://www.tamtam.ai/c/scania) (scania.com)
Specializing in transportation and vehicle manufacturing, the company operates in the southernmost province of Sweden with a focus on population and culture | Truck Transportation | ๐ฌ๐ท Athens | 876 | 1821 |
| 21 | [MARAN GAS MARITIME INC.](https://www.tamtam.ai/c/maran-gas-maritime-inc) (marangas.com)
Specializing in gas shipping, the organization manages LNG and LPG carriers within a diverse fleet, with over 300 professionals supporting a large crew | Maritime Transportation | ๐ฌ๐ท Athens | 848 | |
| 22 | [Sarantis Group](https://www.tamtam.ai/c/sarantis-group) (sarantisgroup.com)
A multinational consumer products group with a 50-year history, offering personal care, home care, health care products, luxury cosmetics, and recognized brands globally | Manufacturing | ๐ฌ๐ท Athens | 802 | 1964 |
| 23 | [Titan Cement Company SA](https://www.tamtam.ai/c/titan-cement-company-sa) (titan.gr)
Innovative provider of construction materials and solutions for safe and sustainable homes, buildings, and infrastructure with a focus on low-carbon operations | Wholesale Building Materials | ๐ฌ๐ท Athens | 786 | 1902 |
| 24 | [Hellenic Cables](https://www.tamtam.ai/c/hellenic-cables) (hellenic-cables.com)
Leading manufacturer of cables, conductors, plastic, and rubber compounds in South-Eastern Europe, with production plants in Greece, Romania, and Bulgaria Exporting to over 50 countries | Appliances, Electrical, and Electronics Manufacturing | ๐ฌ๐ท Athens | 754 | 1950 |
| 25 | [doValue Greece](https://www.tamtam.ai/c/dovalue-greece) (dovaluegreece.gr)
A leading independent loan and real estate management group in South Europe, specializing in NPLs with a focus on responsible solutions and value creation | Financial Services | ๐ฌ๐ท Athens | 710 | |
| 26 | [PPC Renewables - ฮฮฮ ฮฮฝฮฑฮฝฮตฯฯฮนฮผฮตฯ](https://www.tamtam.ai/c/ppc-renewables) (ppcr.gr)
Specializing in renewable energy production, this subsidiary of Greece's largest power generation company focuses on wind, solar, hydro, geothermal, and biomass energy | Renewable Energy Power Generation | ๐ฌ๐ท Athens | 682 | 2006 |
| 27 | [Nice n Easy Group](https://www.tamtam.ai/c/nice-n-easy-group) (niceneasy.group)
A group of organic restaurants in Greece promoting healthy-gourmet and farm-to-table dining, supporting fair trade, and leading trends in healthy eating | Hospitality | ๐ฌ๐ท Athens | 614 | |
| 28 | [Ocean Rig](https://www.tamtam.ai/c/ocean-rig) (deepwater.com)
Specializing in offshore drilling services, the company operates advanced drilling units to explore and develop oil and gas resources in deep waters | Wholesale Petroleum and Petroleum Products | ๐ฌ๐ท Athens | 596 | |
| 29 | [Ministry of Foreign Affairs of the Hellenic Republic](https://www.tamtam.ai/c/ministry-of-foreign-affairs-of-the-hellenic-republic) (mfa.gr)
Promotes Greece's foreign policy, represents country globally, fosters international cooperation, safeguards rights of citizens abroad, and coordinates bilateral/multilateral activities | Government Administration | ๐ฌ๐ท Athens | 588 | 1830 |
| 30 | [Qualco Technology](https://www.tamtam.ai/c/qualco-technology) (qualco.tech)
A leading Fintech solutions provider in Credit Management sector, offering analytics-driven software solutions for NPL, Data Analytics, Loan Management, SCF, and Dynamic Discounting worldwide | Software Development | ๐ฌ๐ท Athens | 587 | 1998 |
## 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 Athens
- [The largest companies in Athens](https://www.tamtam.ai/l/largest-companies-athens) (271)
- [Critical infrastructure operators in Athens](https://www.tamtam.ai/l/critical-infrastructure-operators-athens) (35)
- [Financial services firms in Athens](https://www.tamtam.ai/l/financial-services-firms-athens) (31)
- [Retail chains in Athens](https://www.tamtam.ai/l/retail-chains-athens) (27)
## The same list elsewhere in Greece
- [Multinational companies in Greece](https://www.tamtam.ai/l/multinational-companies-greece) (217)
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Source: https://www.tamtam.ai/l/multinational-companies-athens