LONDON (Reuters) - Bermuda-based Nordic American Tanker Shipping Ltd. said a public offering of 4 million common shares was priced at $32 a share, an 11 percent discount to the stock's Tuesday close.

The offering is expected to close on May 18 and the underwriters have a 30-day option to purchase up to 600,000 additional shares to cover over-allotments, the company said in a statement.

Morgan Stanley is acting as the bookrunning manager for the offering and DnB NOR Markets Inc is the co-manager, it said.