0001193125-26-275551 | 11-K | XBRL Viewer | Martin Marietta Materials INC

EBP, Schedule of Asset Held for Investment [Line Items]

Schedule of Assets


Martin Marietta Savings and Investment Plan
EIN: 56-1848578 Plan Number: 006
Schedule H, Line 4i – Schedule of Assets
(Held at End of Year)
December 31, 2025

		(c)
	(b)	Description of Investment
	Identity of Issue,	Including Maturity Date,		(e)
	Borrower, Lessor, or	Rate of Interest, Collateral,	(d)	Current
(a)	Similar Party	Par or Maturity Value	Cost	Value
				(In Thousands)
	BlackRock Institutional Trust Company, N.A.	BlackRock Equity Index Fund J		$	126,461
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2035 O			96,843
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2030 O			81,122
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2040 O			75,162
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2045 O			74,269
	Harbor Funds	Harbor Capital Appreciation R			70,339
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2050 O			67,006
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index Retirement O			65,719
	Galliard Capital Management, LLC	Galliard Stable Return Fund E			62,771
*	Martin Marietta Materials, Inc.	Common Stock			60,667
	Washington Mutual	American Funds Washington Mutual Class R-6			55,979
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2055 O			48,562
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2060 O			37,004
	The Vanguard Group	Vanguard International Growth Fund Admiral Shares			35,271
	The Vanguard Group	Vanguard Explorer Fund Admiral Shares			28,197
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2065 O			19,651
	Dodge & Cox Funds	Dodge & Cox Income Fund			16,615
	BlackRock Institutional Trust Company, N.A.	BlackRock Mid Cap Equity Index Fund M			10,582
	IS MSCI EAFE INTL K	iShares MSCI Europe, Australasia and Far East (EAFE®) International Index Fund Class K			5,222
	BlackRock Institutional Trust Company, N.A.	BlackRock US Debt Index Fund M			1,845
	BlackRock Institutional Trust Company, N.A.	BlackRock Russell 2000 Index Fund M			1,624
	Great Gray Trust Company, LLC	Galliard Retirement Income Fund Class F35			346
*	Fidelity Investments Inc.	Fidelity® Government Money Market Fund Class K6			89
	Participant loans**	Interest rates ranging from 4.00% to 10.00%, maturing through November 2040			26,990
				$	1,068,336

	Note: Cost information has not been included in column (d) because all investments are participant directed.
	* Indicates party-in-interest to the Plan.
	** The accompanying financial statements classify participant loans as notes receivable from participants.

Exempt Party-in-Interest Transactions (Details) - EBP 006 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Employee Benefit Plan, Related Party and Party-in-Interest Transactions [Line Items]
Employee benefit plan, administrative expenses	$ 689,000
Employee Benefit Plan Trustee
Employee Benefit Plan, Related Party and Party-in-Interest Transactions [Line Items]
Employee benefit plan, administrative expenses	$ 689,000
Employee Benefit Plan Trustee \| Common Stock
Employee Benefit Plan, Related Party and Party-in-Interest Transactions [Line Items]
Number of shares held	97,000	109,000
Employee benefit plan, investment acquired, excluding plan interest in master trust, cost	$ 10,483,000	$ 11,359,000
Employee benefit plan, change in net asset available for benefit, increase from dividend income on investment	$ 334,000

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2025

EBP, Investment, Fair Value and NAV [Line Items]

Schedule of Fair Value Hierarchy of Plan's Assets and Estimated Fair Value of Plan's Investment Funds

The following table sets forth by level, within the fair value hierarchy, the Plan’s assets at fair value as of December 31:


	2025
	Level 1		Total
	(In Thousands)
Common stock	$	60,667	$	60,667
Mutual funds		141,373		141,373
Collective trust fund		346		346
Investments measured at NAV (a)				838,960
Total			$	1,041,346

	2024
	Level 1		Total
	(In Thousands)
Common stock	$	56,373	$	56,373
Mutual funds		128,266		128,266
Investments measured at NAV (a)				693,656
Total			$	878,295

(a)

In accordance with GAAP, certain investments that were measured at NAV per share (or its equivalent) have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the line items presented in the statements of net assets available for benefits.

The following table sets forth a summary of the Plan’s investment funds with a reported estimated fair value using NAV per share at December 31:



	Fair Value
	2025		2024		Unfunded Commitment	Redemption Frequency	Other Redemption Restrictions	Redemption Notice Period
	(In Thousands)
Galliard Stable Return Fund E	$	62,771	$	66,293	None	Immediate	None	12-month
BlackRock Equity Index Fund J		126,461		106,076	None	Immediate	None	None
Harbor Capital Appreciation R		70,339		62,958	None	Immediate	None	None
BlackRock LifePath® Portfolios Class O		565,338		447,863	None	Immediate	None	None
BlackRock Mid Cap Equity Index Fund M		10,582		8,536	None	Immediate	None	None
BlackRock Russell 2000 Index Fund M		1,624		931	None	Immediate	None	None
BlackRock US Debt Index Fund M		1,845		999	None	Immediate	None	None
Collective Trust Funds	$	838,960	$	693,656	None	Immediate	None	None

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Tabular disclosure of fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

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Statements of Net Assets Available for Benefits - EBP 006 - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
EBP, Asset [Abstract]
Investments at fair value	$ 1,041,346	$ 878,295
Receivables:
Employee contributions	77	842
Martin Marietta Materials, Inc. contributions	27	317
Notes receivable from participants	26,990	24,014
Receivables, Total	27,094	25,173
Net assets available for benefits	1,068,440	903,468
Collective Trust Funds
EBP, Asset [Abstract]
Investments at fair value	839,306	693,656
Mutual Funds
EBP, Asset [Abstract]
Investments at fair value	141,373	128,266
Martin Marietta Materials, Inc. Common Stock
EBP, Asset [Abstract]
Investments at fair value	$ 60,667	$ 56,373

Fair Value Measurements - Schedule of Fair Value Hierarchy of Plan's Assets and Estimated Fair Value of Plan's Investment Funds (Details) - EBP 006 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 1,041,346	$ 878,295
Martin Marietta Materials, Inc. Common Stock
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	60,667	56,373
Mutual Funds
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	141,373	128,266
Collective Trust Fund
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	346
Collective Trust Funds
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	839,306	693,656
Level 1 \| Martin Marietta Materials, Inc. Common Stock
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	60,667	56,373
Level 1 \| Mutual Funds
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	141,373	128,266
Level 1 \| Collective Trust Fund
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	346
Fair Value Measured at Net Asset Value Per Share
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	838,960	693,656
Fair Value Measured at Net Asset Value Per Share \| Galliard Stable Return Fund E
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 62,771	66,293
Redemption Notice Period	12 months
Fair Value Measured at Net Asset Value Per Share \| BlackRock Equity Index Fund J
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 126,461	106,076
Fair Value Measured at Net Asset Value Per Share \| Harbor Capital Appreciation R
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	70,339	62,958
Fair Value Measured at Net Asset Value Per Share \| BlackRock LifePath Portfolios Class O
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	565,338	447,863
Fair Value Measured at Net Asset Value Per Share \| BlackRock Mid Cap Equity Index Fund M
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	10,582	8,536
Fair Value Measured at Net Asset Value Per Share \| BlackRock Russell 2000 Index Fund M
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	1,624	931
Fair Value Measured at Net Asset Value Per Share \| BlackRock US Debt Index Fund M
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	1,845	999
Fair Value Measured at Net Asset Value Per Share \| Collective Trust Funds
EBP, Investment, Fair Value and NAV [Line Items]
Investments at fair value	$ 838,960	$ 693,656

Schedule of Assets (Held at End of Year) (Tables)

12 Months Ended

Dec. 31, 2025

EBP, Schedule of Asset Held for Investment [Line Items]

Schedule of Assets


Martin Marietta Savings and Investment Plan
EIN: 56-1848578 Plan Number: 006
Schedule H, Line 4i – Schedule of Assets
(Held at End of Year)
December 31, 2025

		(c)
	(b)	Description of Investment
	Identity of Issue,	Including Maturity Date,		(e)
	Borrower, Lessor, or	Rate of Interest, Collateral,	(d)	Current
(a)	Similar Party	Par or Maturity Value	Cost	Value
				(In Thousands)
	BlackRock Institutional Trust Company, N.A.	BlackRock Equity Index Fund J		$	126,461
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2035 O			96,843
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2030 O			81,122
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2040 O			75,162
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2045 O			74,269
	Harbor Funds	Harbor Capital Appreciation R			70,339
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2050 O			67,006
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index Retirement O			65,719
	Galliard Capital Management, LLC	Galliard Stable Return Fund E			62,771
*	Martin Marietta Materials, Inc.	Common Stock			60,667
	Washington Mutual	American Funds Washington Mutual Class R-6			55,979
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2055 O			48,562
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2060 O			37,004
	The Vanguard Group	Vanguard International Growth Fund Admiral Shares			35,271
	The Vanguard Group	Vanguard Explorer Fund Admiral Shares			28,197
	BlackRock Institutional Trust Company, N.A.	BlackRock Lifepath® Index 2065 O			19,651
	Dodge & Cox Funds	Dodge & Cox Income Fund			16,615
	BlackRock Institutional Trust Company, N.A.	BlackRock Mid Cap Equity Index Fund M			10,582
	IS MSCI EAFE INTL K	iShares MSCI Europe, Australasia and Far East (EAFE®) International Index Fund Class K			5,222
	BlackRock Institutional Trust Company, N.A.	BlackRock US Debt Index Fund M			1,845
	BlackRock Institutional Trust Company, N.A.	BlackRock Russell 2000 Index Fund M			1,624
	Great Gray Trust Company, LLC	Galliard Retirement Income Fund Class F35			346
*	Fidelity Investments Inc.	Fidelity® Government Money Market Fund Class K6			89
	Participant loans**	Interest rates ranging from 4.00% to 10.00%, maturing through November 2040			26,990
				$	1,068,336

	Note: Cost information has not been included in column (d) because all investments are participant directed.
	* Indicates party-in-interest to the Plan.
	** The accompanying financial statements classify participant loans as notes receivable from participants.

Accounting Policies (Policies) - EBP 006	12 Months Ended
Accounting Policies (Policies) - EBP 006	Dec. 31, 2025
EBP, Accounting Policy [Line Items]
Basis of Accounting	Basis of Accounting The financial statements of the Martin Marietta Savings and Investment Plan (the Plan) are prepared on the accrual basis of accounting in conformity with accounting principles generally accepted in the United States of America (GAAP).
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts, changes therein and related disclosures. Accordingly, actual results could differ from those estimates and assumptions.
Investment Valuation and Income Recognition	Investment Valuation and Income Recognition Investments are reported at fair value. Fair value, as defined under GAAP, is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 3 for discussion of fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recognized on the accrual basis. Dividends are recorded on the ex-dividend date. Net appreciation or depreciation includes the Plan’s gains and losses on investments purchased and sold as well as held during the year.
Notes Receivable from Participants	Notes Receivable from Participants Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Related fees are recorded as administrative expenses and are expensed when they are incurred. Delinquent participant loans are reclassified as distributions based upon the terms of the Plan.
Payments of Benefits	Payments of Benefits Benefits are recorded upon distribution; therefore, no liability is recorded for distributions to participants who terminated during the year but have chosen to defer payments.
Administrative Expenses	Administrative Expenses The Plan's administrative expenses are paid by either the Plan or Martin Marietta Materials, Inc. (the Company), as provided by the plan document. Certain administrative functions are performed by employees of the Company. No such employee receives compensation from the Plan. Expenses relating to specific participant transactions (notes receivable and distributions) are charged directly to the participant's account.
Subsequent Events	Subsequent Events Plan management has evaluated subsequent events through the date of filing this Form 11-K.

Disclosure of accounting policy for use of estimate in preparation of financial statement of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References + Details

Fair Value Measurements

12 Months Ended

Dec. 31, 2025

EBP, Investment, Fair Value and NAV [Line Items]

Fair Value Measurements

The framework for measuring fair value provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). GAAP establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include:

•

Level 1: Quoted prices in active markets for identical assets or liabilities that the Plan can access at the measurement date.

•

Level 2: Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly, such as:

Quoted prices for similar assets or liabilities in active markets

Quoted prices for identical or similar assets or liabilities in inactive markets

Inputs other than quoted prices that are observable for the asset or liability

Martin Marietta Savings and Investment Plan

Notes to Financial Statements (continued)

Inputs that are derived principally from or corroborated by observable market data by correlation or other means.

If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability.

•

Level 3: Unobservable inputs about which little or no market data exists, therefore requiring an entity to develop its own assumptions.

Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Plan’s assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels.

The following is a description of the valuation methodologies used for assets measured at fair value. The methods described below may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of these assets could result in a different fair value measurement at the reporting date.

There have been no changes in the methodologies used as of December 31, 2025 and 2024.

Mutual funds

Mutual funds are publicly traded investments and are valued daily at the closing price reported on the active market in which the securities are traded.

Collective trust funds

Most of these funds are valued at the net asset value (NAV) of units of a collective trust. The NAV, as provided by the trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the fund less its liabilities. The practical expedient would not be used when it is determined to be probable that the funds will sell the investment for an amount different than the reported NAV. Participant transactions (purchases and sales) may occur daily. Collective trust funds with readily determinable fair values are classified as Level 1 assets within the fair value hierarchy because their values are based on quoted prices in active markets for identical investments.

Stable value collective trust fund

The Plan invests in a stable value collective trust fund for which quoted prices are not available in active markets for identical instruments. The NAV, as provided by the trustee, is used as a practical expedient to estimate fair value. This practical expedient would not be used if it is determined to be probable that the fund will sell the investment for an amount different from the reported NAV. Participant transactions (purchases and sales) may occur daily. If the Plan initiates a full redemption of the stable value collective trust fund, the issuer reserves the right to require a 12-month notification in order to ensure that

Martin Marietta Savings and Investment Plan

Notes to Financial Statements (continued)

securities liquidations will be carried out in an orderly business manner. The stable value collective trust fund is not required to be classified within a level on the fair value hierarchy.

Company's Common Stock

Martin Marietta's common stock is valued at the Company's publicly reported common stock price. Participant transactions, limited to sales only, may occur daily.

The following table sets forth by level, within the fair value hierarchy, the Plan’s assets at fair value as of December 31:


	2025
	Level 1		Total
	(In Thousands)
Common stock	$	60,667	$	60,667
Mutual funds		141,373		141,373
Collective trust fund		346		346
Investments measured at NAV (a)				838,960
Total			$	1,041,346

	2024
	Level 1		Total
	(In Thousands)
Common stock	$	56,373	$	56,373
Mutual funds		128,266		128,266
Investments measured at NAV (a)				693,656
Total			$	878,295

(a)

Martin Marietta Savings and Investment Plan

Notes to Financial Statements (continued)

The following table sets forth a summary of the Plan’s investment funds with a reported estimated fair value using NAV per share at December 31:



	Fair Value
	2025		2024		Unfunded Commitment	Redemption Frequency	Other Redemption Restrictions	Redemption Notice Period
	(In Thousands)
Galliard Stable Return Fund E	$	62,771	$	66,293	None	Immediate	None	12-month
BlackRock Equity Index Fund J		126,461		106,076	None	Immediate	None	None
Harbor Capital Appreciation R		70,339		62,958	None	Immediate	None	None
BlackRock LifePath® Portfolios Class O		565,338		447,863	None	Immediate	None	None
BlackRock Mid Cap Equity Index Fund M		10,582		8,536	None	Immediate	None	None
BlackRock Russell 2000 Index Fund M		1,624		931	None	Immediate	None	None
BlackRock US Debt Index Fund M		1,845		999	None	Immediate	None	None
Collective Trust Funds	$	838,960	$	693,656	None	Immediate	None	None

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

The entire disclosure for fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

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