X0306 4 2015-03-24 0001030749 GULFMARK OFFSHORE INC GLF 0001452077 Rubio Samuel R 842 W. SAM HOUSTON PARKWAY N. STE 400 HOUSTON TX 77024 1 SVP - Controller & CAO Common Stock 2015-03-24 4 A 0 19489 0 A 46480 D Common Stock 2015-03-24 4 F 0 1373 13.265 D 45107 D Restricted stock vesting 1/3 on 12 months, 1/3 on 24 months and 1/3 on 36 months from effective date of grant, March 24, 2015. 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/ Samuel R. Rubio 2015-03-26