worldwide . dryships also owns approximately 40 % of the outstanding shares of ocean rig udw inc. nasdaq orig an international drilling contractor . dryships owns a fleet of 24 drybulk carriers comprising 4 capesize and 20 panamax with a combined deadweight tonnage of approximately 2.3 million tons and 6 offshore supply vessels comprising 2 platform supply and 4 oil spill recovery vessels . the company s executive offices are located in amaroussion greece . dryships common stock is listed on the nasdaq capital market where it trades under the symbol drys . read complete overview ocean rig corcovado and ocean rig olympia naming ceremony at samsung heavy industries 16 12 2010