Toisa Limited is a diversified maritime shipping company beneficially owned by Gregory Callimanopulos, operating a global fleet of 46 vessels. The company maintains 26 offshore oil service vessels, including construction support and ROV support units, 13 tankers, and 7 Kamsarmax bulkers. Its operations span the North Sea, Brazil, Mexico, and the Far East. Toisa relies on non-debtor management companies, including Sealion Shipping Ltd., to provide technical, crewing, and chartering services for its modern, double-hull tanker and dry cargo fleet.