These Romanian companies operate in critical infrastructure sectors, predominantly banking and finance, but also energy, telecommunications, and healthcare. The companies are generally large, well-established firms. Banca Transilvania supports entrepreneurs with innovative banking solutions. OMV Petrom is an integrated energy producer in Southeastern Europe. BCR offers universal financial services, while Telekom Romania Mobile provides mobile telecommunication services. MedLife operates an extensive private medical network.
A clear pattern is the concentration of headquarters in Bucharest, with a few exceptions like Banca Transilvania in Cluj-Napoca and Delgaz Grid in Târgu Mureș. The founding dates range from the late 19th century, such as Electrica (1898) and the National Bank of Romania (1880), to more recent establishments like UniCredit Bank Romania (2007) and Telekom Romania Mobile (2014), indicating a mix of historical institutions and newer entrants.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Banca Transilvaniabancatransilvania.ro
Financial institution supporting entrepreneurs with innovative banking solutions, digital services, and strong community involvement in sports and culture. |
7,520 | |||
| 2 |
OMV Petromomvpetrom.com
Largest integrated energy producer in Southeastern Europe, hydrocarbon production, refining capacity, power plant operation, and retail fuel stations. |
6,697 | |||
| 3 | 6,608 | ||||
| 4 |
Raiffeisen Bank Romaniaraiffeisen.ro
Provides comprehensive banking products and services to individuals, SMEs, and large corporations through multiple distribution channels nationwide. |
5,901 | |||
| 5 |
BRD - Groupe Societe Generalebrd.ro
Financial institution providing banking, investment, leasing, and insurance services to a wide range of customers, including individuals, SMEs, and corporations. |
5,623 | |||
| 6 |
Telekom Romania Mobilemobile.telekom.ro
Telekom Romania Mobile offers mobile services focused on connecting people's worlds seamlessly and simply, without any fixed ideas |
3,306 | |||
| 7 |
UniCredit Bank Romaniaunicredit.ro
Pan-European bank supporting communities, delivering value to stakeholders, fostering integrity, responsibility, and collaboration across 13 European banks. |
3,276 | |||
| 8 |
Rompetrol (KMG International)rompetrol.com
A multinational energy company with 5,000 employees in 11 countries, focused on providing sustainable energy solutions through refining, petrochemicals, and retail activities |
2,593 | |||
| 9 |
MedLifemedlife.ro
Extensive private medical network offering diagnostics, treatment, prevention, wellness, and hospitalization services across Romania with advanced technology. |
2,157 | |||
| 10 |
ING Romaniaing.ro
A global financial institution focused on empowering individuals and businesses with innovative banking solutions, emphasizing work-life balance and career development |
1,989 | |||
| 11 |
Electricaelectrica.ro
Electricity distribution, supply, and production in Romania, with significant presence in energy services and publicly listed on stock exchanges. |
1,907 | |||
| 12 |
Allianz-Tiriac Asigurariallianztiriac.ro
Providing comprehensive insurance products and financial planning services including auto, home, travel, life, health, liability, and private pension management. |
1,279 | |||
| 13 |
National Bank of Romaniabnr.ro
The central bank of Romania ensures price stability, conducts monetary and exchange rate policies, regulates credit institutions, issues currency, and manages international reserves |
1,173 | |||
| 14 |
ASIROM - Vienna Insurance Groupasirom.ro
Providing accessible and secure insurance products and services with a focus on simplicity, customer time, and digital and physical resources. |
970 | |||
| 15 |
Delgaz Griddelgaz.ro
distribution of electricity and natural gas through extensive networks serving over three million customers across multiple Romanian counties |
935 | |||
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 |
CFR Calatori S.A.cfrcalatori.ro
A Romanian company established by the government to provide railway passenger transport services in Bucharest and throughout the country |
877 | |||
| 17 |
PPC Romaniappcenergy.ro
Leading energy provider in Southeast Europe serving millions with over 35 TWh, focusing on community, environment, and efficiency. |
800 | |||
| 18 |
S.N.G.N. Romgaz S.A.romgaz.ro
Largest Romanian natural gas producer and supplier, geological exploration, methane production, underground storage, electricity generation, offshore concession management. |
785 | |||
| 19 |
Alpha Bank Romaniaalphabank.ro
Financial institution providing modern banking products and services for individuals, SMEs, and corporates with nationwide presence. |
769 | |||
| 20 |
Apa Nova București - Veoliaapanovabucuresti.ro
Management of urban water supply and wastewater systems, including treatment, distribution, and infrastructure modernization with significant investments. |
697 | |||
| 21 |
Intesa Sanpaolo Bank Romaniaintesasanpaolobank.ro
Financial institution offering banking products, services to retail customers, SMEs, and corporations in Romania and internationally, with a focus on growth and quality. |
673 | |||
| 22 |
Hidroelectricahidroelectrica.ro
Leading renewable energy producer operating hydroelectric plants, wind farms, supplying electricity wholesale and retail, ensuring grid security in Romania. |
667 | |||
| 23 |
Garanti BBVA Romaniagarantibbva.ro
Provides comprehensive banking products, leasing solutions, and fleet management services for retail, SME, and corporate clients through digital platforms and national branch networks. |
653 | |||
| 24 |
ENGIE Romaniaengie.ro
ENGIE is committed to creating smart solutions, unique experiences, and stronger communities through the mobilization of all energies |
622 | |||
| 25 |
Generali Romaniagenerali.ro
Offers comprehensive insurance policies and financial protection solutions for individual and corporate clients within the Romanian market through specialized coverage plans. |
482 | |||
| 26 | 466 | ||||
| 27 | 
C.N. CFR S.A.cfr.ro
A transportation company based in Bucharest, Romania, specializing in trucking and railroad services for freight and logistics operations |
431 | |||
| 28 |
TRANSGAZ SAtransgaz.ro
Operator of national gas transmission system, managing transmission, international transit, dispatching, and research-design in natural gas field under Romanian law. |
391 | |||
| 29 |
Vista Bank Romaniavistabank.ro
Universal bank offering personalized, high-quality financial solutions to individuals and companies, growing through acquisitions and organic expansion. |
375 | |||
| 30 |
Enel Româniappcenergy.ro
Leading energy provider in Southeast Europe serving millions of customers with a focus on community responsibility and environmental sustainability. |
337 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 12, 2026.
More company lists in Romania
- The largest companies in Romania 183
- Multinational companies in Romania 55
- Retail chains in Romania 43
- Companies with a mobile app in Romania 31