Vassilis Roumantzis

Part of Piraeus Financial Holdings SA, ATE Securities SA is a brokerage firm that provides brokerage services. The company is based in Athens, Greece.

Part of Motor Oil (Hellas) Corinth Refineries SA, Optima Bank SA is a brokerage services provider. The company is based in Athens, Greece. The Greek company was founded in 2000. Dimitrios Kyparissis has been the CEO of the company since 2019.

Part of Alpha Services & Holdings SA, Alpha Finance Investment Services SA is a brokerage services provider. The company is based in Athens, Greece. The CEO of the Greek company is Paris M. Vassiliadis.

National Securities Single Member SA (NSSM) is the investment banking and brokerage arm of National Bank of Greece SA (ATH: ETE, OTCMKTS: NBGIF). Founded in 1988 as National Securities Co. SA, the firm acquired National P&K Securities SA in 2007 and changed their name to NBG Securities SA in 2013. They rebranded as National Securities SA in 2015 and National Securities Single Member SA in 2021. Headquartered in Athens, NSSM provides a range of brokerage and investment banking services to retail and institutional clients such as trading Greek equities, derivatives and fixed-income products, M&A and strategic advisory and capital markets advisory services.