ARGO S.A. is one of the leading private Greek Oil Companies, with headquarters in Kalymnos Island, Greece maintaining branches in Athens, Thessaloniki, Rhodes, Kos, Thira, Naxos, Paros-Antiparos, Milos and Kefalonia. The company supplies a network of 110 petrol stations extending from the island of Chalki, southernmost Greek – EU boundaries, to the northernmost Greek mainland boundaries. ARGO S.A. is also active in bunkering operations covering most of the Aegean and Ionian Sea.