GulfMark Offshore (GLF) Shares Enter Oversold Territory By: Energy Stock Channel June 24, 2015 at 12:19 PM EDT In trading on Wednesday, shares of GulfMark Offshore, Inc. (GLF) entered into oversold territory, changing hands as low as $11.62 per share.. Read More >> Related Stocks: S&P Oil & Gas Eqpt & Services SPDR