X0306 4 2023-02-06 0 0001439095 MRC GLOBAL INC. MRC 0001816893 McCarthy John P 1301 MCKINNEY ST., SUITE 2300 HOUSTON TX 77010 0 1 0 0 See Remarks Common Stock 2023-02-06 4 A 0 15485 0.00 A 80651 D On February 6, 2023, the reporting person received 15,485 Restricted Stock Units (the "February 2023 Grant"). Each Restricted Stock Unit represents a contingent right to receive one share of the issuer's Common Stock. 34% of the February 2023 Grant will vest on February 6, 2024 and 33% of the February 2023 Grant will vest on each of February 6, 2025 and February 6, 2026, each conditioned on the reporting person's continued service with the issuer and subject to accelerated vesting under certain circumstances. SVP-Supply Chain, Quality & Technical Sales /s/ Ann D. Garnett, by power of attorney 2023-02-08