His Marmaras Navigation has picked up the 56,600-dwt pair Hanjin Rostock and Hanjin Albany (both built 2011), brokers say.
A price of $13m has been placed on each of the vessels by independent shipbroking sources.
This compares with the $15.34m placed on the supramaxes by VesselsValue.com.
Marmaras officials could not be reached for comment today.
Diamantides has a fleet of 19 bulkers under the Marmaras umbrella.