SEC Form 3

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 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Colonna Alan Hugh (Last) (First) (Middle) 2 HOUSTON CENTER 909 FANNIN, SUITE 3100 (Street) HOUSTON TX 77010 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 09/01/2012	3. Issuer Name and Ticker or Trading Symbol MRC GLOBAL INC. [ MRC ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) EVP-Glob.Bus.Dev.&Sup.Chn.Mgt.	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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	3,177	D

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: 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)	(1)	01/31/2017	Common Stock	12,710	9.62	D
Stock Option (right to buy)	(2)	06/16/2018	Common Stock	30,059	17.36	D
Stock Option (right to buy)	(3)	12/03/2019	Common Stock	21,853	21.05	D
Stock Option (right to buy)	(4)	11/10/2021	Common Stock	8,287	18.1	D

Explanation of Responses:

1. The option is fully vested and exercisable. 33 1/3% of the options reported above became exercisable on each of 1/31/2010, 1/31/2011 and 1/31/2012.

2. 33 1/3% of the options reported above became exercisable on each of 6/16/2011 and 6/16/2012; and 33 1/3% of the options reported above will become exercisable on 6/16/2013.

3. 33 1/3% of the options reported above will become exercisable on each of 12/3/2012, 12/3/2013 and 12/3/2014.

4. 20% of the options reported above will become exercisable on each of 11/10/2012, 11/10/2013, 11/10/2014, 11/10/2015 and 11/10/2016.

Remarks:

	/s/ Justin M. Whittenburg, Attorney-in-fact	09/07/2012
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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