The deal from a European shipping company calls on STX Shipbuilding to deliver the vessels by June 2010, the company said in a regulatory filing.
Shares of STX Shipbuilding were trading at 35,050 won as of 11:11 a.m., down 0.28 percent.
The shipbuilder won deals valued at more than $10 billion last year to build 170 vessels including bulk carriers. In 2006, STX Shipbuilding clinched shipbuilding orders valued at $4 billion.
Korea ranked No. 1 in the global shipbuilding industry in terms of new orders, order backlogs and the volume of vessels built in 2007 by winning a combined 32 million compensated gross tons (CGTs) in new orders. That accounted for 40.4 percent of all new orders around the globe.
Korea, home to seven of the world’s top 10 shipyards, clinched record-high orders last year because of strong demand for crude carriers and offshore exploration equipment during a time of high oil prices.