X0306 4 2018-11-15 0001030749 GULFMARK OFFSHORE INC GLF 0001028689 DAVIS EUGENE I 842 WEST SAM HOUSTON PARKWAY N., SUITE 400 HOUSTON TX 77024 1 Common Stock 2018-11-15 4 D 0 5875 D 0 D As previously reported, the reporting person received a grant of restricted stock units representing a contingent right to receive the equivalent number of shares of common stock of the Issuer for no consideration. These restricted stock units vested and settled on November 15, 2018 based upon the reporting person's completion of the required period of continued service in accordance with the terms of the grant. Subsequently on November 15, 2018, each share of common stock was disposed of as provided for under the Agreement and Plan of Merger, dated as of July 15, 2018, between Tidewater Inc. ("Tidewater") and the Issuer, in exchange for (1) 1.100 shares of common stock of Tidewater and (2) any applicable cash in lieu of fractional shares of common stock of Tidewater. /s/ Eugene Davis 2018-11-15