X0306 4 2017-03-27 0001030749 GULFMARK OFFSHORE INC GLF 0001236480 MITCHELL JAMES M 842 W. SAM HOUSTON PARKWAY N. STE 400 HOUSTON TX 77024 1 EVP & CFO Common Stock 2017-03-27 4 F 0 13537 0.365 D 141922 D Transaction was a withholding of portion of vested restricted share units to satisfy the reporting person's tax withholding obligations upon vesting, pursuant to the award agreement and associated equity incentive plan under which the award was granted. /s/ James M. Mitchell 2017-03-28