Tsakos Energy Navigation (TEN) is readying to offer a new series of preferred shares as it readies a down payment on its latest aframax newbuilding duo.

The New York-listed TEN filed a prospectus for the sale of series "F" fixed-to-floating preferred shares.

This will be the company's fifth such preferred share issuance, with the company having already issued 13 million of the 25 million in blank check preferred shares authorised.