MLM Q3 2021 Supplemental Information

Q3 2021

SUPPLEMENTAL INFORMATION*

November 2, 2021

* All information provided in these slides is qualified in its entirety by reference to the Company's filings with the

Securities and Exchange Commission (SEC), which are available on both the Company's and the SEC's websites.

Statement Regarding Safe Harbor for Forward-Looking Statements

This presentation may contain forward-looking statements - that is, information

related to future, not past, events. Like other businesses, Martin Marietta (the Company) is subject to risks and uncertainties which could cause its actual results to differ materially from its projections or that could cause forward-looking statements to prove incorrect,

including the risks and uncertainties discussed in Martin Marietta's most recent Annual

Report on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, which have been filed with the Securities and Exchange Commission (SEC) and are readily accessible on the SEC's website and the Company's website. Except as legally required, Martin Marietta undertakes no obligation to publicly update or revise any forward-looking statements, whether resulting from new information, future developments or otherwise.

Non-GAAP Financial Measures

This presentation contains certain financial measures presented on a non-GAAP basis which are defined in the Appendix. These non-GAAP financial measures are not in accordance with, nor are they a substitute for, GAAP measures. Reconciliations of non-GAAP financial measures to the most directly comparable GAAP financial measures are provided in the Appendix. Management believes these non-GAAP measures are commonly used financial measures for investors to evaluate the Company's operating performance, and when read in conjunction with the Company's consolidated

financial statements, present a useful tool to evaluate the Company's ongoing operations,

performance from period to period and anticipated performance. In addition, these are some of the factors the Company used in internal evaluation of the overall performance of its businesses. Management acknowledges there are many items that impact a company's reported results and the adjustments reflected in these non-GAAP measures are not intended to present all items that may have impacted these results. In addition, these non-GAAP measures are not necessarily comparable to similarly titled measures used by other companies.

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Q3 2021 REVIEW

THIRD-QUARTER RESULTS, AS REPORTED

PRODUCTS & SERVICES REVENUES

	$1,463M
$1,241M
2020	2021

ADJUSTED EBITDA*

$502M	$490M
$70M 1
$432M
2020	2021

*Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliation to nearest GAAP measure.

GROSS PROFIT

$405M	$442M
2020	2021

EARNINGS PER DILUTED SHARE

$4.71	$4.07
$0.87 1
$3.84
2020	2021

• Established quarterly records for consolidated and aggregates revenues and gross profit; top-line improvement more than offset higher energy-related costs
• Achieved record Adjusted EBITDA and earnings per diluted share, on comparable basis 1
• Building Materials business benefitted from organic shipment and pricing growth and value-enhancing acquisitions
• Magnesia Specialties delivered double-digit revenue and profitability growth
• Successful implementation of mid-year price increases in targeted markets supports attractive pricing acceleration

1 Q3 2020 included $70 million, or $0.87 per diluted share, of nonrecurring gains on surplus land sales and divested assets that affect quarter-over-quarter comparability

Note: Third-quarter results and trends described in this Supplemental Information may not necessarily be indicative of the Company's future performance.

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AGGREGATES PERFORMANCE

SHIPMENTS (TONS)	AVERAGE SELLING PRICE (ASP)

	+ 10%	•
		57.0M
51.8M
		•
		•
2020		2021

Shipments benefitted from growing product demand across primary end-use markets and contributions from recent acquisitions

Total shipment growth by group:

• East Group: + 10 percent
• West Group: + 10 percent

Organic shipments up 6.0 percent, notwithstanding contractor capacity constraints and wet weather in several markets that governed overall pace of construction activity

	+ 1%	•
$14.75		$14.93
		•
		•
2020		2021

Total ASP growth by group:

• East Group: + 0.4 percent

(inclusive of acquisitions)

• West Group: + 2.8 percent

Organic pricing increased 2.2 percent; higher percentage of lower-priced base stone shipments and East Group opportunistic sales of low- priced excess fill material muted overall pricing growth

Successful mid-year price increases in targeted markets provides momentum for attractive pricing acceleration into 2022

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