- Alpha Bank – The third largest bank in Greece. As of March 31, 2012, it had total assets of EUR 57.6 billion. Alpha Bank is controlled by the Costopoulos family.
- Agricultural Bank of Greece (ATEbank) – A commercial bank based in Greece. The Bank was established in 1929 and operates over 470 branches and 870 ATMs nationwide.
- Attica Bank – A Greece-based banking and financial institution. The company was founded in 1925 and operates over 85 branches across the country. As of March 2012, the Bank had over EUR 4.0 billion in total assets.
- Bank of Cyprus – The leading Cypriot banking and financial services group. The Bank operates over 570 branches, of which 187 in Greece, 135 in Cyprus, and 4 in the UK. As of March 2012, the Bank had about EUR 38.7 billion in total assets.
- Citibank Greece – One the largest card issuers in Greece and one of the first to introduce investment products to the Greek market
- EFG Eurobank Ergasias – The second largest bank in Greece with total assets of € 73.6 billion. The Bank also has operations in Romania, Bulgaria, Serbia, Cyprus, Poland, Turkey, Ukraine, UK and Luxembourg.
- Emporiki Bank – A commercial bank headquartered in Athens. The Bank operates as a subsidiary of Credit Agricole Croup.
- First Business Bank (FBBank) – A Greek commercial bank that offers financial services to corporate and retail customers. It was established in 2001 and operates over 20 retail branches across Greece.
- Geniki Bank – A part of Societe Generale Group since 2004. As of June 30, 2011, Geniki Bank had consolidated assets of EUR 4,082.29 million.
- Hellenic Bank – The third largest bank in Cyprus with a 11% share of deposits and 7% of the loans market. Hellenic has 67 branches in Cyprus and 20 in Greece
- HSBC Bank Greece – offers banking services to retail, corporate and institutional clients. It was established in 1981.
- Marfin Egnatia Bank – A subsidiary of Cyprus Popular Bank (known as Laiki Bank Group). Marfin Egnatia Bank is supervised by the Central Bank of Cyprus and the Bank of Greece.
- Millennium Bank – A member of the Millennium BCP Group (Banco Comercial Português). The company was established in 2000 and has over 180 branches across Greece.
- National Bank of Greece – The oldest and largest Greek bank with 530 domestic branches and 1,385 ΑΤΜs. As March 31, 2012, NBG had EUR 104.095 billion in total assets.
- Panellinia Bank – started its operations in 2001. Today, it operates about 30 branches and over 30 ATMs. As of December 31, 2011, the Bank had EUR 741.39 million in total assets.
- Piraeus Bank – A Greek commercial bank with over 730 branches (329 in Greece). As of March 2012, the Bank’s customer deposits were about EUR 21.0 billion, with gross loans of EUR 36.0 billion and total assets of EUR 47.5 billion.
- Probank – A new bank in the Greek financial sector, established in 2001. As of December 2011, the Bank had total assets of over EUR 4.4 billion.
- Proton Bank – was founded in 2001. In 2011, it was nationalized by the Greek government. All deposits and healthy assets of the old Proton Bank were transferred to the newly established Bank.
- T Bank – A Greek commercial bank. It was formerly known as Aspis Bank and changed its name to T Bank in 2010. T Bank was founded in 1992 and today operates as a subsidiary of TT Hellenic Postbank.
- TT Hellenic Postbank – was established in 1900 in Kreta. As of September 30, 2011, the Bank had total assets of 15.87 billion euros. The company was formerly known as Greek Postal Savings Bank and changed its name on March 12, 2008. Hellenic Republic is the major shareholder of TT Hellenic Postbank.