ONEX stands on a maritime legacy that spans 165 years, rooted in Greece’s long-standing relationship with shipbuilding, seafaring, and industrial craftsmanship. This heritage is not treated as history alone, but as a living foundation that continues to shape the company’s identity, technical culture, and strategic direction today.
Founded in Ermoupolis in 1861, the Syros Shipyard marked the beginning of modern shipbuilding and heavy industry in Greece. Originally created to support the growth of steam navigation, it became one of the country’s most important industrial facilities, contributing to ship construction, repair, engineering and maritime innovation for more than 160 years.
Founded in 1962 in Elefsina, Western Attica, the shipyard was developed to strengthen Greece’s industrial and shipbuilding capabilities. Beginning operations in 1969, it evolved into one of the Mediterranean’s major shipbuilding and repair facilities, supporting commercial shipping, naval programs, industrial construction, and heavy manufacturing for decades.
Founded in 2004 by Panos T. Xenokostas, ONEX began with a focus on technology systems and business solutions, built around innovation and advanced engineering capabilities. Over time, the Group expanded into shipbuilding, maritime services, energy, infrastructure, and industrial operations, evolving into one of Greece’s leading industrial and technology groups with an international footprint.
In 2018, ONEX Group assumed management of the historic Syros Shipyard, marking the beginning of a major industrial revival. The takeover restarted operations, restored employment, and initiated a long-term modernization program that repositioned Syros as a strategic ship repair and industrial hub in the Eastern Mediterranean.
In 2022, ONEX Group assumed management of the historic Elefsina Shipyard, launching one of Greece’s most significant industrial revival projects. The transition marked the beginning of a comprehensive restoration and modernization effort aimed at reactivating shipbuilding, ship repair, and heavy industrial capabilities while strengthening Greece’s strategic maritime position in the Eastern Mediterranean.