Shipowner-turned-activist investor George Economou is not happy with Genco Shipping & Trading and is trying to take its chairman’s head in a proxy fight.

Economou, whose GK Investor is a 5.4% shareholder, issued a scathing review of company management in a securities filing on Monday.

New York-listed, Manhattan-headquartered Genco has rebuffed his demands to bolster the stock price through share buybacks, Economou said.