Fredriksen bought the additional slice of the convertible due in 2019 via his Geveran Trading vehicle.

It marks the second time in three months the magnate has bought into the debt.

Geveran purchased $10m in September, taking his interest in the convertible to $25m in the process.

Golden Ocean issued the bond in January, raising $200m from the paper.

The purchases come with Golden Ocean and fellow Fredriksen company Knightsbridge in the midst of a merger that will create the largest public dry cargo shipowning company in the US.