FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   BEST RHYS J 2. Date of Event Requiring Statement (Month/Day/Year) 04/11/2012 3. Issuer Name and Ticker or Trading Symbol MRC GLOBAL INC. [MRC] (Last) (First) (Middle) 2 HOUSTON CENTER, 909 FANNIN, SUITE 3100 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) HOUSTON, TX 77010 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 0 I See Footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	  (3)	12/01/2017	Common Stock	19,065	$ 9.62	D	Â
Stock Option (right to buy)	  (4)	05/12/2020	Common Stock	2,697	$ 18.54	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BEST RHYS J 2 HOUSTON CENTER, 909 FANNIN, SUITE 3100 HOUSTON, TX 77010	  X	Â	Â	Â

Signatures

/s/ Brian K. Shore, Attorney-in-fact		04/11/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	PVF Holdings LLC ("PVF") owns 84,214,026 shares of common stock, par value $0.01 per share ("Common Stock"), of MRC Global Inc. (the "Company"). Mr. Best owns 127.1033 common units ("Common Units") of PVF (which he owns through a company), representing 0.04% of the total outstanding Common Units. Mr. Best may be deemed to beneficially own 32,072 shares of Common Stock indirectly through his ownership of such Common Units. The Amended and Restated Limited Liability Company Agreement of PVF, dated as of October 31, 2007 (the "LLC Agreement"), Amendment No. 1 to the LLC Agreement, dated as of December 18, 2007, and Amendment No. 2 to the LLC Agreement, dated as of October 31, 2009, are filed as exhibits 10.17, 10.17.1, and 10.17.2 to the Company's Registration Statement on Form S-1, File No. 333-178980.
(2)	Mr. Best does not have the power to vote or dispose of the shares of Common Stock that correspond to his ownership of Common Units and thus does not have beneficial ownership of such shares. In addition, Mr. Best does not have any pecuniary interest in the shares of Common Stock held by PVF because he does not control PVF and does not have or share investment control over the shares of Common Stock owned by PVF.
(3)	33 1/3% of the options reported above became exercisable on 12/1/2010; 33 1/3% of the options reported above became exercisable on 12/1/2011; and 33 1/3% of the options reported above will become exercisable on 12/1/2012.
(4)	25% of the options reported above will become exercisable on each of 5/12/2012, 5/12/2013, 5/12/2014, and 5/12/2015.

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