Siem Offshore Inc is a Cayman Islands-based shipping company engaged in the provision of marine services to the offshore oil and gas industry. The Companyâ€™s primary activity is to own and operate offshore support vessels (OSVs) for the offshore oil and gas service industry. It has over 40 vessels, including 12 Platform Supply Vessels (PSV), four Multi-Role Supply Vessels (MRSVs) and ten Anchor Handling Tug Supply Vessels (AHTS), among others. The fleet operates in the North Sea, West Africa, the Middle East, India, the United States Gulf and Brazil. The Company also has offices in Norway, Brazil, Germany, the Netherlands, the United States and India, as well as has representation in Nigeria. The Company has more than 20 direct and indirect subsidiaries. Its major shareholder is Siem Industries Inc.