GulfMark Offshore to List on NYSE

GulfMark Offshore has filed an application to list its common stock on the New York Stock Exchange. Pending approval of its application, GulfMark anticipates that its shares of common stock will begin trading on the NYSE on July 20, 2007, under the symbol "GLF". Until such time that the application is approved and trading commences on the NYSE, GulfMark will continue to trade on the NASDAQ Stock Market under the symbol "GMRK".

"Listing on the NYSE is a significant milestone in our company's history as we join the majority of mid and large-cap oil and gas service companies listed on the NYSE," said Bruce A. Streeter, President and CEO of GulfMark. "We believe the move will increase visibility among investors and analysts and decrease trading volatility, thus benefiting all of our shareholders. We have had a long and successful history with NASDAQ and appreciate their contribution to our growth since our listing in 1997. We look forward to our new listing with the NYSE and are excited for our shareholders."