GulfMark Offshore Inc. (NYSE: GLF) reports the exchange offer of US $500 million aggregate principal amount of its 6.375% senior notes due 2022 has expired.

The exchange commenced on Jan. 16 and expired on Feb. 14. As of the expiration date, holders of US $500 million, or 100%, of the outstanding principal amount of the notes have tendered their notes for exchange. GulfMark has accepted all notes validly tendered and not properly withdrawn. Holders of notes previously tendered for exchange no longer have the right to withdraw tenders of notes.

Based in Houston, GulfMark provides marine transportation services to the energy industry through a fleet of offshore support vessels.