Nordic American Tankers has readied a $40m at the market offering, the latest in a fundraising spree from the Herbjorn Hansson-led company.

The tanker owner announced after the close Friday that it intends to sell another 19.6 million shares through B Riley FBR, adding to its 141.9 million outstanding shares.

The sales will be used for "general corporate purposes," per Securities and Exchange Commission filings, and will net the company just over $38m after fees once completed.