<SEC-DOCUMENT>0000950157-25-000556.txt : 20250708
<SEC-HEADER>0000950157-25-000556.hdr.sgml : 20250708
<ACCEPTANCE-DATETIME>20250708073251
ACCESSION NUMBER:		0000950157-25-000556
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		14
CONFORMED PERIOD OF REPORT:	20250707
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20250708
DATE AS OF CHANGE:		20250708

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MARTIN MARIETTA MATERIALS INC
		CENTRAL INDEX KEY:			0000916076
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		ORGANIZATION NAME:           	01 Energy & Transportation
		EIN:				561848578
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12744
		FILM NUMBER:		251109528

	BUSINESS ADDRESS:	
		STREET 1:		4123 PARKLAKE AVE
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27612
		BUSINESS PHONE:		919-781-4550

	MAIL ADDRESS:	
		STREET 1:		4123 PARKLAKE AVE
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27612
</SEC-HEADER>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 14pt; font-weight: bold;">UNITED STATES</div>

    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 14pt; font-weight: bold;">SECURITIES AND EXCHANGE COMMISSION</div>

    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 12pt; font-weight: bold;">WASHINGTON, D.C. 20549</div>

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    <div style="text-align: center; margin-right: 1.35pt; margin-left: 19.55pt; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">CURRENT REPORT</div>

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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</div>

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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 24pt; font-weight: bold;"><span style="-sec-ix-hidden:Fact_f6af33cfaecd499db510098a493d5be0">Martin Marietta Materials, Inc.</span><br/>
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Check the appropriate box below if the Form 8-K &#64257;ling is intended to simultaneously satisfy the &#64257;ling obligation of the registrant under any of the following provisions:</div>

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    <td style="width: 96%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</div>
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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Securities registered pursuant to Section 12(b) of the Act:</div>

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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Indicate by check mark whether the registrant is an emerging growth company as de&#64257;ned in Rule 405 of the Securities Act of 1933 (&#167; 230.405 of this chapter) or Rule 12b-2 of
      the Securities Exchange Act of 1934 (&#167; 240.12b-2 of this chapter).</div>

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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised &#64257;nancial
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain
      Officers.</div>

    <div><br/>
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">On July 7, 2025, Martin Marietta Materials, Inc. (the &#8220;Company&#8221;) appointed Michael J. Petro, to serve as the Company&#8217;s Senior Vice President and Chief Financial Officer,
      effective as of July 8, 2025 (the &#8220;Effective Date&#8221;), replacing Robert J. Cardin, who has served as the Company&#8217;s Interim Chief Financial Officer since April 1<span style="font-size: 10pt; font-family: 'Times New Roman';">0</span>, 2025.&#160; Mr. Cardin
      will remain with the Company in his role as Senior Vice President, Controller and Chief Accounting Officer.</div>

    <div><br/>
    </div>

    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Mr. Petro, age 41, joined the Company in 2015 and currently serves as its Senior Vice President of Strategy and Development, a role he has held since 2021.&#160; Mr. Petro will
      continue serving in this Strategy and Development capacity following the Effective Date.&#160; Prior to this Chief Financial Officer role, Mr. Petro served as Vice President, Strategy and Development since 2018 and served as Director of Strategy and
      Development from 2015 to 2018.&#160; Prior to joining the Company, Mr. Petro worked in investment banking at Wells Fargo Securities and served as a consultant at PwC.&#160; Mr. Petro earned an undergraduate degree in accounting from Louisiana State University
      and a master&#8217;s of business administration degree from Duke University.</div>

    <div><br/>
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">In connection with his promotion to the role of Chief Financial Officer, the Company and Mr. Petro executed an offer letter (the &#8220;Offer Letter&#8221;).&#160; Pursuant to the Offer
      Letter, Mr. Petro&#8217;s base salary will be increased to $600,000 and he will receive a one-time grant of restricted stock units with a grant date value of $1,000,000, which will vest in full on the fifth anniversary of the Effective Date, subject to Mr.
      Petro&#8217;s continued employment through such date and the other terms and conditions applicable to ordinary course grants of restricted stock units to the Company&#8217;s executive officers.&#160; All other terms and conditions of Mr. Petro&#8217;s compensation
      arrangements remain the same, including his target annual incentive award (90% of base salary), his target long-term incentive award (200% of base salary) and the terms and conditions of his Employment Protection Agreement.</div>

    <div><br/>
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    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">A copy of the press release announcing the appointment of Mr. Petro as Chief Financial Officer of the Company is attached to this Current Report on Form 8-K as Exhibit 99.1<span style="font-size: 10pt; font-family: 'Times New Roman';">.</span></div>

    <div><br/>
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              <div style="text-align: left;"><span style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;">Item 9.01</span></div>
            </td>

    <td style="text-align: left; vertical-align: top; width: auto;">
              <div style="text-align: left;"><span style="font-size: 10pt; font-family: 'Times New Roman'; font-weight: bold;">Financial Statement and Exhibits.</span></div>
            </td>

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              <div style="text-align: left;"><span style="font-size: 10pt; font-family: 'Times New Roman';">(d)</span></div>
            </td>

    <td style="text-align: left; vertical-align: top; width: auto;">
              <div style="text-align: left;"><span style="font-size: 10pt; font-family: 'Times New Roman';">Exhibits</span></div>
            </td>

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              <div style="text-align: left;"><a href="ex99-1.htm"><span style="font-size: 10pt; font-family: 'Times New Roman';">99.1</span></a></div>
            </td>

    <td style="text-align: left; vertical-align: top; width: auto;">
              <div style="text-align: left;"><a href="ex99-1.htm"><span style="font-size: 10pt; font-family: 'Times New Roman';">Press Release dated July 8, 2025</span></a></div>
            </td>

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    <div style="text-align: center; font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold;">SIGNATURES</div>

    <div><br/>
    </div>

    <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly
      authorized.</div>

    <div><br/>
    </div>

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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">MARTIN MARIETTA MATERIALS, INC.</div>
            </td>

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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">(Registrant)</div>
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    <td style="width: 3%; vertical-align: top;">&#160;</td>

    <td style="width: 37%; vertical-align: top;">&#160;</td>

    <td style="width: 13%; vertical-align: top;">&#160;</td>

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    <td style="width: 50%; vertical-align: top;">
              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Date: July 8, 2025</div>
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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">By:</div>
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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">/s/ Bradley D. Kohn</div>
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    <td style="width: 37%; vertical-align: top; border-top: 2px solid rgb(0, 0, 0);">
              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Bradley D. Kohn,</div>
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    <td style="width: 13%; vertical-align: top;">&#160;</td>

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    <td style="width: 50%; vertical-align: top;">&#160;</td>

    <td style="width: 3%; vertical-align: top;">&#160;</td>

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              <div style="text-align: left; font-family: 'Times New Roman'; font-size: 10pt;">Senior Vice President and General Counsel</div>
            </td>

    <td style="width: 13%; vertical-align: top;">&#160;</td>

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    <td style="width: 3%; vertical-align: top;">&#160;</td>

    <td style="width: 37%; vertical-align: top;">&#160;</td>

    <td style="width: 13%; vertical-align: top;">&#160;</td>

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  <div><font style="font-weight: bold; font-family: 'Times New Roman';">Exhibit 99.1</font><br>
  </div>
  <img src="image_01.jpg">
  <div><br>
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  <div style="text-align: left;">
    <div style="text-align: center; color: rgb(0, 125, 198); font-family: Arial; font-size: 14pt;">MARTIN MARIETTA APPOINTS MICHAEL J. PETRO</div>
    <div style="text-align: center; color: rgb(0, 125, 198); font-family: Arial; font-size: 14pt;">AS CHIEF FINANCIAL OFFICER</div>
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    <div style="text-align: justify; font-family: Arial; font-size: 10pt;"><font style="font-size: 10pt; font-family: Arial; font-weight: bold;">Raleigh, N.C., (July 8, 2025) </font>&#8211; Martin Marietta Materials, Inc. (NYSE: MLM) (&#8220;Martin Marietta&#8221; or the
      &#8220;Company&#8221;), a leading national supplier of aggregates and heavy building materials, today announced the appointment of Michael J. Petro as Senior Vice President and Chief Financial Officer, effective immediately. Robert J. Cardin, who has been
      serving as the Company&#8217;s interim CFO since April 2025, will continue in his role as Senior Vice President, Controller and Chief Accounting Officer.</div>
    <div>&#160;</div>
    <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Mr. Petro, who most recently served as Senior Vice President of Strategy and Development at Martin Marietta, brings decades of financial leadership experience. Since joining the
      Company in 2015, he has played a key role in formulating and executing the Company&#8217;s strategic growth initiatives including through his work on successful portfolio-enhancing transactions that have greatly expanded Martin Marietta&#8217;s geographic
      footprint and improved the Company&#8217;s product mix.&#160; These include the acquisitions of Bluegrass Materials, Lehigh Hanson&#8217;s West Region, the Tiller Corporation, Albert Frei &amp; Sons and affiliates of Blue Water Industries as well as the divestiture
      of certain non-core assets.&#160; Prior to joining the Company, Mr. Petro held roles as an investment banker and a consultant, where he developed a deep understanding of capital markets, financial analysis, forecasting and process optimization. As CFO,
      Mr. Petro will continue to oversee Martin Marietta&#8217;s Strategy and Development team.</div>
    <div>&#160;</div>
    <div style="text-align: justify; font-family: Arial; font-size: 10pt;">&#8220;On behalf of the Board and management team, I am pleased to announce Michael&#8217;s promotion to Chief Financial Officer,&#8221; said Ward Nye, Chair and CEO of Martin Marietta. &#8220;Michael&#8217;s
      work both on and leading our Strategy and Development team over the past ten years has meaningfully contributed to our Company&#8217;s success. With his proven track record of delivering results and creating value, and his demonstrated leadership
      capabilities, we are confident Michael is the right person to lead our finance organization forward.&#8221;</div>
    <div>&#160;</div>
    <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Mr. Nye continued, &#8220;I also want to acknowledge and thank Bob for stepping into the role of Interim Chief Financial Officer over the past several months and supporting a smooth and
      seamless transition. Bob is an extremely talented and highly valued member of our ONE team, and we look forward to continuing to benefit from his capable and effective leadership as he returns to his primary duties as Senior Vice President,
      Controller and Chief Accounting Officer.&#8221;</div>
    <div>&#160;</div>
    <div style="text-align: justify; font-family: Arial; font-size: 10pt;">&#8220;I am honored to be taking on the role of CFO,&#8221; said Mr. Petro. &#8220;Martin Marietta has a winning approach to capital allocation and a proven formula for success, and I look forward to
      continuing to advance our strategy, while delivering compelling, long-term value for Martin Marietta shareholders.&#8221;</div>
    <div style="text-align: justify; font-family: Arial; font-size: 10pt;"> <br>
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      <div style="width: 100%;" class="BRPFPageFooter">
        <div style="text-align: center;">-END-<br>
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    <div style="text-align: justify; font-family: Arial; font-size: 10pt;">
      <div style="text-align: right; font-family: Arial; font-size: 10pt; font-weight: bold;"> <img src="image_01.jpg"></div>
      <div style="text-align: justify; font-family: Arial; font-size: 10pt; font-weight: bold;"> <br>
      </div>
      <div style="text-align: justify; font-family: Arial; font-size: 10pt; font-weight: bold;">About Michael J. Petro</div>
      <div>&#160;</div>
      <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Mr. Petro has held leadership positions at Martin Marietta since he joined in 2015. He most recently served as Senior Vice President of Strategy and Development. Prior to his
        promotion to Senior Vice President in 2021, he was Vice President of Strategy and Development (2018-2021), and Director of Strategy and Development (2015-2018). Earlier in his career he worked in investment banking at Wells Fargo Securities and as
        a consultant at PwC. Mr. Petro holds an undergraduate degree in accounting from Louisiana State University, and a master&#8217;s of business administration degree from Duke University&#8217;s Fuqua School of Business.</div>
      <div>&#160;</div>
      <div style="text-align: left; color: rgb(0, 125, 198); font-family: Arial; font-size: 10pt;">About Martin <font style="color: rgb(0, 125, 198);">Marietta</font></div>
      <div>&#160;</div>
      <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Martin Marietta, a member of the S&amp;P 500 Index, is an American-based company and a leading supplier of building materials, including aggregates, cement, ready mixed concrete
        and asphalt. Through a network of operations spanning 28 states, Canada and The Bahamas, dedicated Martin Marietta teams supply the resources for building the solid foundations on which our communities thrive. Martin Marietta&#8217;s Magnesia Specialties
        business produces high-purity magnesia and dolomitic lime products used worldwide in environmental, industrial, agricultural and specialty applications. For more information, visit <font style="font-size: 10pt; font-family: Arial; color: rgb(0, 125, 198);">www.martinmarietta.com</font> or <font style="font-size: 10pt; font-family: Arial; color: rgb(0, 125, 198);"><font style="color: rgb(0, 125, 198);">www</font>.magnesiaspecialties.com.</font></div>
      <div>&#160;</div>
      <div>
        <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Investor Contact:</div>
        <div style="text-align: justify; color: rgb(0, 125, 198); font-family: Arial; font-size: 10pt; font-weight: bold;">Jacklyn Rooker</div>
        <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Director, Investor Relations</div>
        <div style="text-align: justify; font-family: Arial; font-size: 10pt;">(919) 510-4736</div>
        <div style="text-align: justify; font-family: Arial; font-size: 10pt;">Jacklyn.Rooker@martinmarietta.com</div>
        <div><br>
        </div>
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        <div style="text-align: justify; font-family: Arial; font-size: 10pt; font-style: italic;">MLM-G</div>
      </div>
      <div>&#160;</div>
      <div style="text-align: justify; margin-right: 18pt; font-family: Arial; font-size: 10pt; font-style: italic;">This release contains forward-looking statements within the meaning of federal securities law. Statements and assumptions on future
        revenues, income and cash flows, performance, economic trends, the outcome of litigation, regulatory compliance and environmental remediation cost estimates are examples of forward-looking statements. Numerous factors could affect the Company&#8217;s
        forward-looking statements and actual performance.</div>
      <div>&#160;</div>
      <div style="text-align: justify; margin-right: 18pt; font-family: Arial; font-size: 10pt; font-style: italic;">Investors are cautioned that all forward-looking statements involve risks and uncertainties, and are based on assumptions that the Company
        believes in good faith are reasonable at the time the statements are made, but which may be materially different from actual results. Investors can identify these statements by the fact that they do not relate only to historic or current facts. The
        words &#8220;may&#8221;, &#8220;will&#8221;, &#8220;could&#8221;, &#8220;should&#8221;, &#8220;anticipate&#8221;, &#8220;believe&#8221;, &#8220;estimate&#8221;, &#8220;expect&#8221;, &#8220;forecast&#8221;, &#8220;intend&#8221;, &#8220;outlook&#8221;, &#8220;plan&#8221;, &#8220;project&#8221;, &#8220;scheduled&#8221; and other words of similar meaning in connection with future events or future operating or
        financial performance are intended to identify forward-looking statements. Any or all of Martin Marietta&#8217;s forward-looking statements in this release and in other publications may turn out to be wrong.</div>
      <div>&#160;</div>
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          <div style="text-align: center;">-END-<br>
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          <hr noshade="noshade" style="border-width: 0px; clear: both; margin: 4px 0px; width: 100%; height: 2px; color: #bfbfbf; background-color: #bfbfbf;"></div>
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      <div style="text-align: right; margin-right: 18pt; font-family: Arial; font-size: 10pt; font-style: italic;"> <img src="image_01.jpg"></div>
      <div style="text-align: right; margin-right: 18pt; font-family: Arial; font-size: 10pt; font-style: italic;"> <br>
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      <div style="text-align: justify; margin-right: 18pt; font-family: Arial; font-size: 10pt; font-style: italic;">You should consider these forward-looking statements in light of risk factors discussed in Martin Marietta&#8217;s Annual Report on Form 10-K for
        the year ended December 31, 2024, and other periodic filings made with the SEC. All of the Company&#8217;s forward-looking statements should be considered in light of these factors. In addition, other risks and uncertainties not presently known to the
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  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" />
  <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
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    <link:label xlink:type="resource" xlink:label="dei_CoverAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_CoverAbstract" xml:lang="en-US" id="dei_CoverAbstract">Cover [Abstract]</link:label>
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    <link:label xlink:type="resource" xlink:label="dei_WrittenCommunications" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_WrittenCommunications" xml:lang="en-US" id="dei_WrittenCommunications">Written Communications</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="WrittenCommunications" xlink:to="dei_WrittenCommunications" xlink:title="label: WrittenCommunications to dei_WrittenCommunications" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial" xlink:label="SolicitingMaterial" xlink:title="SolicitingMaterial" />
    <link:label xlink:type="resource" xlink:label="dei_SolicitingMaterial" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_SolicitingMaterial" xml:lang="en-US" id="dei_SolicitingMaterial">Soliciting Material</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SolicitingMaterial" xlink:to="dei_SolicitingMaterial" xlink:title="label: SolicitingMaterial to dei_SolicitingMaterial" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer" xlink:label="PreCommencementTenderOffer" xlink:title="PreCommencementTenderOffer" />
    <link:label xlink:type="resource" xlink:label="dei_PreCommencementTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_PreCommencementTenderOffer" xml:lang="en-US" id="dei_PreCommencementTenderOffer">Pre-commencement Tender Offer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="PreCommencementTenderOffer" xlink:to="dei_PreCommencementTenderOffer" xlink:title="label: PreCommencementTenderOffer to dei_PreCommencementTenderOffer" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer" xlink:label="PreCommencementIssuerTenderOffer" xlink:title="PreCommencementIssuerTenderOffer" />
    <link:label xlink:type="resource" xlink:label="dei_PreCommencementIssuerTenderOffer" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_PreCommencementIssuerTenderOffer" xml:lang="en-US" id="dei_PreCommencementIssuerTenderOffer">Pre-commencement Issuer Tender Offer</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="AmendmentFlag" xlink:title="AmendmentFlag" />
    <link:label xlink:type="resource" xlink:label="dei_AmendmentFlag" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_AmendmentFlag" xml:lang="en-US" id="dei_AmendmentFlag">Amendment Flag</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AmendmentFlag" xlink:to="dei_AmendmentFlag" xlink:title="label: AmendmentFlag to dei_AmendmentFlag" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="DocumentFiscalYearFocus" xlink:title="DocumentFiscalYearFocus" />
    <link:label xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_DocumentFiscalYearFocus" xml:lang="en-US" id="dei_DocumentFiscalYearFocus">Document Fiscal Year Focus</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus" xlink:title="label: DocumentFiscalYearFocus to dei_DocumentFiscalYearFocus" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="DocumentFiscalPeriodFocus" xlink:title="DocumentFiscalPeriodFocus" />
    <link:label xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_DocumentFiscalPeriodFocus" xml:lang="en-US" id="dei_DocumentFiscalPeriodFocus">Document Fiscal Period Focus</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus" xlink:title="label: DocumentFiscalPeriodFocus to dei_DocumentFiscalPeriodFocus" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="DocumentPeriodEndDate" xlink:title="DocumentPeriodEndDate" />
    <link:label xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_DocumentPeriodEndDate" xml:lang="en-US" id="dei_DocumentPeriodEndDate">Document Period End Date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate" xlink:title="label: DocumentPeriodEndDate to dei_DocumentPeriodEndDate" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="EntityRegistrantName" xlink:title="EntityRegistrantName" />
    <link:label xlink:type="resource" xlink:label="dei_EntityRegistrantName" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityRegistrantName" xml:lang="en-US" id="dei_EntityRegistrantName">Entity Registrant Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityRegistrantName" xlink:to="dei_EntityRegistrantName" xlink:title="label: EntityRegistrantName to dei_EntityRegistrantName" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="EntityCentralIndexKey" xlink:title="EntityCentralIndexKey" />
    <link:label xlink:type="resource" xlink:label="dei_EntityCentralIndexKey" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityCentralIndexKey" xml:lang="en-US" id="dei_EntityCentralIndexKey">Entity Central Index Key</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey" xlink:title="label: EntityCentralIndexKey to dei_EntityCentralIndexKey" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="EntityFileNumber" xlink:title="EntityFileNumber" />
    <link:label xlink:type="resource" xlink:label="dei_EntityFileNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityFileNumber" xml:lang="en-US" id="dei_EntityFileNumber">Entity File Number</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityFileNumber" xlink:to="dei_EntityFileNumber" xlink:title="label: EntityFileNumber to dei_EntityFileNumber" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="EntityTaxIdentificationNumber" xlink:title="EntityTaxIdentificationNumber" />
    <link:label xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityTaxIdentificationNumber" xml:lang="en-US" id="dei_EntityTaxIdentificationNumber">Entity Tax Identification Number</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="EntityIncorporationStateCountryCode" xlink:title="EntityIncorporationStateCountryCode" />
    <link:label xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityIncorporationStateCountryCode" xml:lang="en-US" id="dei_EntityIncorporationStateCountryCode">Entity Incorporation, State or Country Code</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode" xlink:title="label: EntityIncorporationStateCountryCode to dei_EntityIncorporationStateCountryCode" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="EntityEmergingGrowthCompany" xlink:title="EntityEmergingGrowthCompany" />
    <link:label xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityEmergingGrowthCompany" xml:lang="en-US" id="dei_EntityEmergingGrowthCompany">Entity Emerging Growth Company</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="EntityAddressAddressLine1" xlink:title="EntityAddressAddressLine1" />
    <link:label xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressAddressLine1" xml:lang="en-US" id="dei_EntityAddressAddressLine1">Entity Address, Address Line One</link:label>
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    <link:label xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_EntityAddressAddressLine2" xml:lang="en-US" id="dei_EntityAddressAddressLine2">Entity Address, Address Line Two</link:label>
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="CityAreaCode" xlink:title="CityAreaCode" />
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    <link:label xlink:type="resource" xlink:label="dei_TradingSymbol" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="dei_TradingSymbol" xml:lang="en-US" id="dei_TradingSymbol">Trading Symbol</link:label>
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  </link:labelLink>
</link:linkbase>
</XBRL>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-101.PRE
<SEQUENCE>5
<FILENAME>mlm-20250707_pre.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
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<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="include/report.css">
<script type="text/javascript" src="Show.js">/* Do Not Remove This Comment */</script><script type="text/javascript">
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<body>
<span style="display: none;">v3.25.2</span><table class="report" border="0" cellspacing="2" id="id2">
<tr>
<th class="tl" colspan="1" rowspan="1"><div style="width: 200px;"><strong>Document and Entity Information<br></strong></div></th>
<th class="th"><div>Jul. 07, 2025</div></th>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CoverAbstract', window );"><strong>Cover [Abstract]</strong></a></td>
<td class="text">&#160;<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentType', window );">Document Type</a></td>
<td class="text">8-K<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_AmendmentFlag', window );">Amendment Flag</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_DocumentPeriodEndDate', window );">Document Period End Date</a></td>
<td class="text">Jul.  07,  2025<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityFileNumber', window );">Entity File Number</a></td>
<td class="text">001-12744<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityRegistrantName', window );">Entity Registrant Name</a></td>
<td class="text">Martin Marietta Materials Inc.<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityCentralIndexKey', window );">Entity Central Index Key</a></td>
<td class="text">0000916076<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityIncorporationStateCountryCode', window );">Entity Incorporation, State or Country Code</a></td>
<td class="text">NC<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityTaxIdentificationNumber', window );">Entity Tax Identification Number</a></td>
<td class="text">56-1848578<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressAddressLine1', window );">Entity Address, Address Line One</a></td>
<td class="text">4123 PARKLAKE AVE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressCityOrTown', window );">Entity Address, City or Town</a></td>
<td class="text">RALEIGH<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressStateOrProvince', window );">Entity Address, State or Province</a></td>
<td class="text">NC<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityAddressPostalZipCode', window );">Entity Address, Postal Zip Code</a></td>
<td class="text">27612<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_CityAreaCode', window );">City Area Code</a></td>
<td class="text">919<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_LocalPhoneNumber', window );">Local Phone Number</a></td>
<td class="text">781-4550<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_Security12bTitle', window );">Title of 12(b) Security</a></td>
<td class="text">Common Stock, $.01 par value per share<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_TradingSymbol', window );">Trading Symbol</a></td>
<td class="text">MLM<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SecurityExchangeName', window );">Security Exchange Name</a></td>
<td class="text">NYSE<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_EntityEmergingGrowthCompany', window );">Entity Emerging Growth Company</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_WrittenCommunications', window );">Written Communications</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_SolicitingMaterial', window );">Soliciting Material</a></td>
<td class="text">false<span></span>
</td>
</tr>
<tr class="ro">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementTenderOffer', window );">Pre-commencement Tender Offer</a></td>
<td class="text">false<span></span>
</td>
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<tr class="re">
<td class="pl" style="border-bottom: 0px;" valign="top"><a class="a" href="javascript:void(0);" onclick="Show.showAR( this, 'defref_dei_PreCommencementIssuerTenderOffer', window );">Pre-commencement Issuer Tender Offer</a></td>
<td class="text">false<span></span>
</td>
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<div style="display: none;">
<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_AmendmentFlag">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_AmendmentFlag</td>
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<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CityAreaCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Area code of city</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CityAreaCode</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td>duration</td>
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</table></div>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_CoverAbstract">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Cover page.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_CoverAbstract</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:stringItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentPeriodEndDate">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentPeriodEndDate</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:dateItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_DocumentType">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_DocumentType</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>dei:submissionTypeItemType</td>
</tr>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressAddressLine1">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Address Line 1 such as Attn, Building Name, Street Name</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressAddressLine1</td>
</tr>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressCityOrTown">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the City or Town</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressCityOrTown</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressPostalZipCode">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Code for the postal or zip code</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressPostalZipCode</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>xbrli:normalizedStringItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
</tr>
<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityAddressStateOrProvince">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the state or province.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityAddressStateOrProvince</td>
</tr>
<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<tr>
<td><strong> Data Type:</strong></td>
<td>dei:stateOrProvinceItemType</td>
</tr>
<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
</tr>
</table></div>
</div></td></tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityCentralIndexKey">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityCentralIndexKey</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td>dei:centralIndexKeyItemType</td>
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<td>na</td>
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<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityEmergingGrowthCompany">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Indicate if registrant meets the emerging growth company criteria.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityEmergingGrowthCompany</td>
</tr>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Two-character EDGAR code representing the state or country of incorporation.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityIncorporationStateCountryCode</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityRegistrantName</td>
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<td>dei_</td>
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<td>xbrli:normalizedStringItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_EntityTaxIdentificationNumber">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b-2<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_EntityTaxIdentificationNumber</td>
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<td>na</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Local phone number for entity.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_LocalPhoneNumber</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementIssuerTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 13e<br> -Subsection 4c<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementIssuerTenderOffer</td>
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<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td><strong> Data Type:</strong></td>
<td>xbrli:booleanItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_PreCommencementTenderOffer">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14d<br> -Subsection 2b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_PreCommencementTenderOffer</td>
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<td>xbrli:booleanItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
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</tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_Security12bTitle">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Title of a 12(b) registered security.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection b<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_Security12bTitle</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
<td>dei_</td>
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<td>dei:securityTitleItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SecurityExchangeName">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Name of the Exchange on which a security is registered.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 12<br> -Subsection d1-1<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SecurityExchangeName</td>
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<tr>
<td style="padding-right: 4px;white-space:nowrap;"><strong> Namespace Prefix:</strong></td>
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<td>dei:edgarExchangeCodeItemType</td>
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<tr>
<td><strong> Balance Type:</strong></td>
<td>na</td>
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<tr>
<td><strong> Period Type:</strong></td>
<td>duration</td>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_SolicitingMaterial">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
<tr><td><div class="body" style="padding: 2px;">
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Exchange Act<br> -Number 240<br> -Section 14a<br> -Subsection 12<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_SolicitingMaterial</td>
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<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Trading symbol of an instrument as listed on an exchange.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>No definition available.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
<td><strong> Name:</strong></td>
<td style="white-space:nowrap;">dei_TradingSymbol</td>
</tr>
<tr>
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<table border="0" cellpadding="0" cellspacing="0" class="authRefData" style="display: none;" id="defref_dei_WrittenCommunications">
<tr><td class="hide"><a style="color: white;" href="javascript:void(0);" onclick="Show.hideAR();">X</a></td></tr>
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<a href="javascript:void(0);" onclick="Show.toggleNext( this );">- Definition</a><div><p>Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.</p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ References</a><div style="display: none;"><p>Reference 1: http://www.xbrl.org/2003/role/presentationRef<br> -Publisher SEC<br> -Name Securities Act<br> -Number 230<br> -Section 425<br></p></div>
<a href="javascript:void(0);" onclick="Show.toggleNext( this );">+ Details</a><div style="display: none;"><table border="0" cellpadding="0" cellspacing="0">
<tr>
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<td style="white-space:nowrap;">dei_WrittenCommunications</td>
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<td>xbrli:booleanItemType</td>
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<td><strong> Balance Type:</strong></td>
<td>na</td>
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<td><strong> Period Type:</strong></td>
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  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="mlm-20250707.xsd" xlink:type="simple"/>
    <context id="c20250707to20250707">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000916076</identifier>
        </entity>
        <period>
            <startDate>2025-07-07</startDate>
            <endDate>2025-07-07</endDate>
        </period>
    </context>
    <dei:AmendmentFlag
      contextRef="c20250707to20250707"
      id="Fact_395d1a274ead46e58be7d3c863d7dd38">false</dei:AmendmentFlag>
    <dei:EntityRegistrantName
      contextRef="c20250707to20250707"
      id="Fact_f6af33cfaecd499db510098a493d5be0">Martin Marietta Materials Inc.</dei:EntityRegistrantName>
    <dei:EntityCentralIndexKey
      contextRef="c20250707to20250707"
      id="Fact_75ab2ce6925b465f8ef30f11f73674cb">0000916076</dei:EntityCentralIndexKey>
    <dei:EntityIncorporationStateCountryCode
      contextRef="c20250707to20250707"
      id="Fact_16d00c29dc904a07ac94b41acf2c40f7">NC</dei:EntityIncorporationStateCountryCode>
    <dei:EntityAddressAddressLine1
      contextRef="c20250707to20250707"
      id="Fact_5b83bf8072ce4490b22c2f3ac5c0c554">4123 PARKLAKE AVE</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="c20250707to20250707"
      id="Fact_6c4d51bbd9bc46dc92aaea71d085fcfd">RALEIGH</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="c20250707to20250707"
      id="Fact_08ddf88084d7404ea7535c51640bb00e">NC</dei:EntityAddressStateOrProvince>
    <dei:DocumentType
      contextRef="c20250707to20250707"
      id="Fact_d6ee4adef17b47b380e0d118580493f9">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="c20250707to20250707"
      id="Fact_be9bd70299d241e6a243914578d1010a">2025-07-07</dei:DocumentPeriodEndDate>
    <dei:EntityFileNumber
      contextRef="c20250707to20250707"
      id="Fact_920ef0cc505049de8ca4d10d8262b5ac">001-12744</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="c20250707to20250707"
      id="Fact_9080e05561594aab8b179569dfe9099a">56-1848578</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressPostalZipCode
      contextRef="c20250707to20250707"
      id="Fact_562f995b5639424a9205904afc10d101">27612</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="c20250707to20250707"
      id="Fact_0507ff46bad046cd9c5158321e2bd3a8">919</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="c20250707to20250707"
      id="Fact_4e00353f1a0d4fc6ae932199540af89d">781-4550</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="c20250707to20250707"
      id="Fact_f7176812c35b4fc5aed8e56d6c0b1c46">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="c20250707to20250707"
      id="Fact_a3e17625e2e044bf986005e4dab0df8c">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="c20250707to20250707"
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    <dei:PreCommencementIssuerTenderOffer
      contextRef="c20250707to20250707"
      id="Fact_91bcbd94134d414db7e1e665b1fe8bb4">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="c20250707to20250707"
      id="Fact_d415ca5e76eb4a07898e358fbf0878c8">Common Stock, $.01 par value per share</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="c20250707to20250707"
      id="Fact_dcac5d240c644e85abac330302af6974">MLM</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="c20250707to20250707"
      id="Fact_8bc64ae0bea44aed8e1a816d9abe4888">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="c20250707to20250707"
      id="Fact_fcc9193aa3d845b4b7b44052be3f5d9b">false</dei:EntityEmergingGrowthCompany>
</xbrl>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
