MLM

Martin Marietta Materials

Institutional Holdings

Latest 13F data

Total Institutional Value

$452.43M

Total Shares Held

726.6K

Institutions

1

Institutional Holders (1)

Latest 13F positions

Gardner Russo & Quinn LLC
CIK: 860643
726.6K$452.4M100.0%
+6%
Feb 12, 2026

Congressional Trades

(6 total)
View all →
MemberTypeAmountDate
DApril McClain Delaney
 Buy$1K - $15KDec 2, 2025
DValerie Hoyle
 Sell$1K - $15KSep 23, 2025
DApril McClain Delaney
 Sell$1K - $15KAug 1, 2025
RLisa McClain
 Sell$1K - $15KJun 10, 2025
RLisa McClain
 Buy$1K - $15KDec 11, 2024
DValerie Hoyle
 Buy$1K - $15KOct 29, 2024

Insider Transactions

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SEC Form 4 filings for MLM — last 6 months

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