STX said the price would be $160m per ship, compared with the original cost of $140m for the 13,000 teu vessels.
The whole deal, including order upgrade, comes in at $1.6bn. The ships will be built at STX’s Jinhae yard in Korea and measure 399m in length, making the design the second largest on the market after Maersk and DSME’s 18,000 teu series.
The news is a welcome fillip for STX, the world’s fourth largest builder, which has not been able to keep up this year with the big three in Korea who have snared billions of dollars of offshore and LNG contracts.