X0306 4 2013-03-27 0 0001030749 GULFMARK OFFSHORE INC GLF 0001391071 Kneen Quintin 10111 RICHMOND AVE, STE 340 HOUSTON TX 77042 0 1 0 0 Exec VP & CFO Common Stock 2013-03-27 4 F 0 5765 39.183 D 65282 D Under the terms of the GulfMark 1997 Incentive Equity Plan and 2010 Omnibus Equity Incentive Plan, shares were sold to the Company to satisfy the tax obligation on restricted shares which restrictions lapsed. /s/ Quintin Kneen 2013-03-29