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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Consolidated Contractors Companyccc.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 |
17,253 | |||
| 2 |
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 |
7,648 | |||
| 3 |
Eurobankeurobank.gr
A strong financial organization offering a wide range of products and services in banking and financial sectors, focusing on social responsibility and sustainability |
6,916 | |||
| 4 |
National Bank of Greecenbg.gr
A bank with a rich history and a promising future, offering stability, expertise, digital services, and a strong presence in Greece and abroad |
5,473 | |||
| 5 |
Alpha Bankalpha.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. |
5,173 | |||
| 6 |
Kaizen Gamingcareers.kaizengaming.com
A rapidly growing GameTech company operating in 13 countries, focused on technology and providing trusted online gaming experiences to customers worldwide |
3,249 | |||
| 7 |
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 |
2,980 | |||
| 8 |
National & Kapodistrian University of Athensen.uoa.gr
A prestigious public university in Athens, Greece, offering a wide range of academic programs and conducting extensive research in various fields |
2,094 | |||
| 9 |
FAMARfamar-group.com
European contract manufacturing and development partner specializing in pharmaceutical and healthcare products, offering flexible solutions from development to distribution. |
1,898 | |||
| 10 |
Cosmote eValuecosmote-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 |
1,843 | |||
| 11 |
Frigoglassfrigoglass.com
Global leader in ice cold merchandisers and glass packaging, providing bespoke coolers and sustainable refrigeration solutions to beverage brands worldwide |
1,743 | |||
| 12 |
Aktor Groupintrakat.gr
A leading international infrastructure provider offering construction, photovoltaic parks, quarry management, technical facilities, and project management services with extensive experience and expertise |
1,546 | |||
| 13 |
GEK TERNA Group of Companiesgekterna.com
A leading business group in Greece with a global presence, specializing in infrastructure, energy production, waste management, and real estate development |
1,476 | |||
| 14 | 1,355 | ||||
| 15 |
THENAMARISthenamaris.com
Global ship manager operating diverse high-specification ocean-going vessels with a focus on safe, efficient, and profitable management services worldwide |
1,186 | |||
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 |
Uni Systemsunisystems.com
An established ICT partner with over 60 years of experience, providing innovative solutions to European and international organizations in various sectors |
1,100 | |||
| 17 |
University of Athensuoa.gr
Oldest university in Southeast Europe, established in 1837, offering a wide range of educational programs and ranked 200th in the world |
1,098 | |||
| 18 |
PeopleCertpeoplecert.org
Global leader in delivering exams and accreditation services worldwide, enabling individuals to achieve their full potential through learning and exams |
951 | |||
| 19 |
KPMG Greecekpmg.com
Offering audit, tax, legal, and advisory services to businesses in Greece and abroad Over 800 professionals with specialized expertise ISO certified |
880 | |||
| 20 |
scaniascania.com
Specializing in transportation and vehicle manufacturing, the company operates in the southernmost province of Sweden with a focus on population and culture |
876 | |||
| 21 |
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 |
848 | |||
| 22 |
Sarantis Groupsarantisgroup.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 |
802 | |||
| 23 |
Titan Cement Company SAtitan.gr
Innovative provider of construction materials and solutions for safe and sustainable homes, buildings, and infrastructure with a focus on low-carbon operations |
786 | |||
| 24 |
Hellenic Cableshellenic-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 |
754 | |||
| 25 |
doValue Greecedovaluegreece.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 |
710 | |||
| 26 |
PPC Renewables - ΔΕΗ Ανανεώσιμεςppcr.gr
Specializing in renewable energy production, this subsidiary of Greece's largest power generation company focuses on wind, solar, hydro, geothermal, and biomass energy |
682 | |||
| 27 |
Nice n Easy Groupniceneasy.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 |
614 | |||
| 28 |
Ocean Rigdeepwater.com
Specializing in offshore drilling services, the company operates advanced drilling units to explore and develop oil and gas resources in deep waters |
596 | |||
| 29 |
Ministry of Foreign Affairs of the Hellenic Republicmfa.gr
Promotes Greece's foreign policy, represents country globally, fosters international cooperation, safeguards rights of citizens abroad, and coordinates bilateral/multilateral activities |
588 | |||
| 30 |
Qualco Technologyqualco.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 |
587 | |||
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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.
More company lists in Athens
- The largest companies in Athens 271
- Critical infrastructure operators in Athens 35
- Financial services firms in Athens 31
- Retail chains in Athens 27