X0306 4 2017-09-03 0 0001439095 MRC GLOBAL INC. MRC 0001654736 Bowhay John L. FULBRIGHT TOWER, 1301 MCKINNEY ST., SUITE 2300 HOUSTON TX 77010 0 1 0 0 SVP -SCM Valve/Technical Sales Common Stock 2017-09-03 4 F 0 18 16.04 D 54481 D On 9/3/2013, the reporting person received 322 restricted shares (the "September 2013 Grant") of Common Stock. 20% of the September 2013 Grant vested on each of 9/3/2014, 9/3/2015, 9/3/2016, and 9/3/2017. The remaining 20% of the September 2013 Grant will vest on 9/3/2018, conditioned on the reporting person's continued service with the issuer and subject to accelerated vesting under certain circumstances. The reporting person surrendered these reported shares to satisfy tax withholding obligations resulting from the vesting of the afformentioned shares of the issuer's Common Stock. /S/ Ann D. Garnett, by power of attorney 2017-09-06