Engine Nominates Two Highly Qualified Candidates for Election to MRC Global’s Board of Directors at the 2024 Annual Meeting - Seite 3

Engine Capital is a value-oriented special situations fund that invests both actively and passively in companies undergoing change.

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CERTAIN INFORMATION CONCERNING THE PARTICIPANTS

Engine Capital, L.P. (“Engine Capital”), together with the other participants named herein (collectively, “Engine”), has filed a preliminary proxy statement and an accompanying BLUE universal proxy card with the Securities and Exchange Commission (“SEC”) to be used to solicit votes for the election of its slate of director nominees at the 2024 annual meeting of stockholders of MRC Global Inc., a Delaware corporation (the “Company”).

ENGINE STRONGLY ADVISES ALL STOCKHOLDERS OF THE COMPANY TO READ THE PROXY STATEMENT AND OTHER PROXY MATERIALS AS THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. SUCH PROXY MATERIALS WILL BE AVAILABLE AT NO CHARGE ON THE SEC’S WEBSITE AT HTTP://WWW.SEC.GOV. IN ADDITION, THE PARTICIPANTS IN THIS PROXY SOLICITATION WILL PROVIDE COPIES OF THE PROXY STATEMENT WITHOUT CHARGE, WHEN AVAILABLE, UPON REQUEST. REQUESTS FOR COPIES SHOULD BE DIRECTED TO THE PARTICIPANTS’ PROXY SOLICITOR.

The participants in the proxy solicitation are expected to be Engine Capital, Engine Jet Capital, L.P. (“Engine Jet”), Engine Lift Capital, LP (“Engine Lift”), Engine Capital Management, LP (“Engine Management”), Engine Capital Management GP, LLC (“Engine GP”), Engine Investments, LLC (“Engine Investments”), Engine Investments II, LLC (“Engine Investments II”), Arnaud Ajdler, Bradley T. Favreau and Daniel B. Silvers (collectively, the “Participants”).

As of the date hereof, Engine Capital directly beneficially owns 3,013,102 shares of Common Stock, $0.01 par value per share (the “Common Stock”), of the Company. As of the date hereof, Engine Jet directly beneficially owns 324,920 shares of Common Stock. As of the date hereof, Engine Lift directly beneficially owns 325,386 shares of Common Stock. Engine Management, as the investment manager of each of Engine Capital, Engine Jet and Engine Lift, may be deemed the beneficial owner of the 3,663,408 shares of Common Stock owned directly by Engine Capital, Engine Jet and Engine Lift. Engine GP, as the general partner of Engine Management, may be deemed the beneficial owner of the 3,663,408 shares of Common Stock owned directly by Engine Capital, Engine Jet and Engine Lift. Engine Investments, as the general partner of each of Engine Capital and Engine Jet, may be deemed the beneficial owner of the 3,338,022 shares of Common Stock owned directly by Engine Capital and Engine Jet. Engine Investments II, as the general partner of Engine Lift, may be deemed the beneficial owner of the 325,386 shares of Common Stock owned directly by Engine Lift. Mr. Ajdler, as the Managing Partner of Engine Management, and the Managing Member of each of Engine GP, Engine Investments and Engine Investments II, may be deemed the beneficial owner of the 3,663,408 shares of Common Stock directly owned by Engine Capital, Engine Jet and Engine Lift. As of the date hereof, neither Messrs. Favreau nor Silvers beneficially owned any shares of Common Stock.