Sostratos of Aegina (Greek: Σώστρατος ὁ Αιγινήτης) is reported to be a famous merchant in the sixth century BC Hellenic world. He is said, by Herodotus, to be the most successful trader of all time. A stone anchor dedicated to Apollo at Gravisca (the port of the Etruscan city of Tarquinii) is thought to have been dedicated by Sostratos and can now be seen at the museum there. Clay storage jars are found throughout Etruscan archaeological sites of the period marked with the Aeginetan letters "SO", may have stood for Sostratos, and are often presumed to be the packaging in which his goods were delivered. Not all scholars, however, accept that the marks on these jars refer to Sostratos.
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Sostratos of Aegina Wikipedia(Text) CC BY-SA