Tsakos Energy Navigation says it will raise new capital through an existing shelf registration.

The New York-listed tanker firm filed to sell $33.8m in equity, comprised of common and preferred shares.

The offering comes through an at-the-market offering Tsakos registered earlier this year for $40m in new capital.

It was able to raise $6m so far, comprised of 1.1 million in common shares and 24,803 in preferred shares.