Eagle Bulk Shipping's lead investor Oaktree Capital has bolstered its interest in the Nasdaq-listed bulker owner.

The purchase has come to light just days after Oaktree invested $45.5m in a convertible notes offering launched by Eagle to fund the purchase of six vessels.

Los Angeles-based Oaktree has bought 1.94 million shares, bringing its total unit count to 28.2 million, according to an SEC filing.