Costamare is aiming to sell $115m in new shares.
The Costis Constantakopoulos-led company said it will sell 4.6 million shares of its 8.875% series E preferred units at $25 per share.
The New York-listed company announced the offering earlier today, without disclosing financial details.
The Constantakopoulos family, Costamare's major shareholders, will buy approximately $7.5m of the stock at the public offering price.
