Established in 2007, Sefine Shipyard swiftly rose to prominence, becoming a leading force in the maritime sector in a remarkably short time. Recognized as one of the distinguished shipyards in Turkiye, Sefine Shipyard specializes in a comprehensive range of services, including new shipbuilding, ship maintenance/repair/conversion services, and the construction of large steel structures.

As a subsidiary of Koloğlu Holding, Sefine Shipyard holds a prominent position as one of the largest shipyards in its region, boasting an expansive area of 250,000 m² in Yalova-Altınova along the Marmara Sea. Sefine stands out the biggest shipyard not only for its physical footprint but also for its substantial business volume and diversity. Featuring a 90,000 DWT Post-Panamax capacity dry dock, the largest in the region, and a 120,000 DWT Aframax capacity floating dock, Sefine Shipyard delivers top-tier ship maintenance/repair/conversion services.

Sefine is actively engaged in both research and development (R&D) and product delivery activities, particularly focusing on new-generation autonomous and swarm unmanned naval vehicles.

Since its inception, Sefine Shipyard has been a trailblazer in the Turkish maritime sector. With a workforce exceeding 6,000 individuals, including subcontractor personnel, the shipyard contributes significantly to the national economy through continuous investments, export successes, pioneering R&D and innovation activities, and the delivery of world-class products and services.