MRC Global : Investor Presentation - 2Q 2022 Update

Investor Presentation

September 19, 2022

Rob Saltiel

President & CEO

Kelly Youngblood

Executive Vice President & CFO

Forward Looking Statements

This presentation contains forward-looking statements within the meaning of Section 27A of the

Securities Act and Section 21E of the Exchange Act. Words such as "will," "expect," "look forward," "guidance," "targeted", "goals", and similar expressions are intended to identify forward-looking statements. Statements about the company's business, including its strategy, its industry, the company's future profitability, the company's guidance on its sales, adjusted EBITDA, adjusted net income, adjusted diluted EPS, adjusted SG&A, gross profit, gross profit percentage, adjusted gross profit, adjusted gross profit percentage, net debt, tax rate, capital expenditures and cash from operations, free cash flow, free cash flow after dividends, growth in the company's various markets and the company's expectations, beliefs, plans, strategies, objectives, prospects and assumptions are not guarantees of future performance. These statements are based on management's expectations

that involve a number of business risks and uncertainties, any of which could cause actual results to differ materially from those expressed in or implied by the forward-looking statements. These statements involve known and unknown risks, uncertainties and other factors, most of which are difficult to predict and many of which are beyond our control, including the factors described in the company's SEC filings that may cause our actual results and performance to be materially different from any future results or performance expressed or implied by these forward-looking statements, including the company's Current Report on Form 8-K dated August 8, 2022.

For a discussion of key risk factors, please see the risk factors disclosed in the company's SEC filings,

which are available on the SEC's website at www.sec.gov and on the company's website, www.mrcglobal.com. Our filings and other important information are also available on the Investor Relations page of our website at www.mrcglobal.com.

Undue reliance should not be placed on the company's forward-looking statements. Although forward- looking statements reflect the company's good faith beliefs, reliance should not be placed on forward- looking statements because they involve known and unknown risks, uncertainties and other factors, which may cause the company's actual results, performance or achievements or future events to differ

materially from anticipated future results, performance or achievements or future events expressed or implied by such forward-looking statements. The company undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise, except to the extent required by law.

2

Non-GAAP Disclaimer

In this presentation, the company is providing certain non-GAAP financial measures. These are not measures of financial performance calculated in accordance with U.S. Generally Accepted Accounting Principles (GAAP) and should not be considered as alternatives. The following GAAP measures have the following non-GAAP measures presented and derived from the respective GAAP measures:

• net income (adjusted EBITDA)
• net income margin (adjusted EBITDA margin)
• gross profit (adjusted gross profit)
• gross profit percentage (adjusted gross profit percentage)
• net income (adjusted net income)
• diluted earnings per share (adjusted diluted EPS)
• selling, general and administrative expense (adjusted SG&A)
• net cash provided by operations (free cash flow and free cash flow after dividends)
• long-termdebt, net (net debt)

They should be viewed in addition to, and not as a substitute for, analysis of our results reported in accordance with GAAP. Management believes that these non-GAAP financial measures provide investors a view to measures similar to those used in evaluating our compliance with certain financial covenants under our credit facilities and provide meaningful comparisons between current and prior year period results. They are also used as a metric to determine certain components of performance-based compensation. They are not necessarily indicative of future results of operations that may be obtained by the company.

MRC Global

A Compelling Investment Opportunity

Leading global distributor of infrastructure products and value-added services provider

Diversified portfolio with long-term growth drivers in each of the markets we support

Rapidly improving top-line and bottom-line financial performance

Solid balance sheet with flexibility for future growth

Sustainability principles embedded in organizational values and product offering

2Q22 Investor Presentation	4

Leading Global Distributor of Infrastructure Products & Value-AddedServices Provider

Valued Supply Chain Partner to Customers and Suppliers

North America		EMEA	APAC
		Stavanger, NO
Nisku, AB	Bradford, UK		Singapore
	Rotterdam, NL
		Dubai, UAE
Munster, IN			Perth, WA
	Pittsburgh, PA		Brisbane, QLD
Bakersfield, CA
Odessa, TX	Global Footprint
Houston, TX
13	Regional Distribution Centers
	26 Valve & Engineering Centers
Valve Engineering &	112	Service Centers
Modification Center		Headquarters
	15	Countries
	~2,600	Employees

Current as of June 30, 2022

2Q22 Investor Presentation	5

Diversified Revenue by End-Market Sector, Product Line and Geography

Distributor with a Stable Customer Base / Leaders in Energy Transition

Stainless Steel & Alloy

Pipe, Fittings & Flanges

Upstream

Production

Midstream 12% Pipeline

21%				General Products
TTM 2Q22	38%	Gas Utilities
REVENUE BY				Gas Products
END-MARKET
SECTOR			International	24%
		Canada	11%
29%			5%
Downstream, Industrial &			TTM 2Q22
		REVENUE BY
Energy Transition			GEOGRAPHY

8%	5%
	Valve, Automation,
	34%	Measurement &
	Instrumentation

TTM 2Q22

REVENUE BY

PRODUCT LINE

29%

Carbon Steel

Pipe, Fittings & Flanges

84%	United States