Greek shipowner George Economou continues to consolidate control over his New York-listed DryShips as the company buys back its own stock.

In a new filing with US securities regulators, Economou reports holding more than 72.4 million shares in the company — a stake of 74.1%.

This is up from a filing in June, in which Economou held the same number of shares, but a lower percentage stake at 72.7%.