MARTIN MARIETTA MATERIALS (MLM) Institutional Ownership Changes & 13F Activity

MARTIN MARIETTA MATERIALS (MLM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Eagle Capital Management, Gardner Russo & Quinn, Sequoia Financial Advisors, Lountzis Asset Management, and Egerton Capital UK.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Eagle Capital ManagementSell-320,284470$276,514
Q1 2026Gardner Russo & QuinnSell-11,201715,411$421,148,042
Q1 2026Sequoia Financial AdvisorsSell-2,09810,326$6,078,697
Q1 2026Lountzis Asset ManagementSell-358,325$4,900,761
Q4 2025Gardner Russo & QuinnBuy39,075726,612$452,432,234
Q4 2025Eagle Capital ManagementSell-7,893320,754$199,720,483
Q4 2025Lountzis Asset ManagementSell-1118,360$5,205,438
Q4 2025Sequoia Financial AdvisorsBuy3112,424$7,735,973
Q3 2025Gardner Russo & QuinnSell-25,242687,537$433,340,748
Q3 2025Eagle Capital ManagementSell-4,549328,647$207,139,445
Q3 2025Sequoia Financial AdvisorsBuy52012,393$7,811,360
Q3 2025Lountzis Asset ManagementSell-318,471$5,339,102
Q2 2025Gardner Russo & QuinnSell-1,473712,779$391,286,919
Q2 2025Sequoia Financial AdvisorsBuy56411,873$6,517,779
Q2 2025Eagle Capital ManagementSell-120333,196$182,911,502
Q1 2025Eagle Capital ManagementBuy333,316333,316$159,368,379
Q1 2025Egerton Capital UKBuy83,062165,338$79,053,058
Q1 2025Gardner Russo & QuinnBuy7,242714,252$341,505,138
Q1 2025Sequoia Financial AdvisorsBuy63711,309$5,407,310
Q1 2025Lountzis Asset ManagementSell-1528,502$4,275,656
Q4 2024Egerton Capital UKSell-122,39882,276$42,495,554
Q4 2024Gardner Russo & QuinnSell-43,062707,010$365,170,539
Q4 2024Sequoia Financial AdvisorsBuy44310,672$5,511,896
Q4 2024Lountzis Asset ManagementSell-3208,654$4,469,791
Q3 2024Egerton Capital UKBuy24,403204,674$110,165,781
Q3 2024Gardner Russo & QuinnSell-13,987750,072$403,726,015
Q3 2024Sequoia Financial AdvisorsBuy2,95110,229$5,505,712
Q3 2024Lountzis Asset ManagementSell-2858,974$4,830,255
Q2 2024Gardner Russo & QuinnSell-23,421764,059$413,966,956
Q2 2024Sequoia Financial AdvisorsBuy1,4497,278$3,943,251

Frequently asked questions about MLM activity

  • Which institutional owners are buying MLM?

    Institutional owners buying MLM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MLM activity?

    "Buy" means an investor increased their reported position in MLM compared to the prior reporting period. This reflects growing exposure to MARTIN MARIETTA MATERIALS (MLM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MLM increasing?

    Institutional interest in MLM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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