Martin Marietta Materials Inc

MLMNYSE
$517.86
-13.19-2.48%
At close: Aug 28, 5:00 PM EST
$518.70
-12.35-2.33%
Pre-Market: 8:00 AM EST
Dividend: The dividend Ex-Date is today

Martin Marietta Materials Ownership & Insider Activity

Martin Marietta Materials (MLM) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 1.6% of shares outstanding. Institutional investors hold 60.0%.

Shares Outstanding

71.019M

Shares Float

63.558M

Insider Shares Owned

942.668K

Insider % Owned

1.6%

Institutional Shares Held

42.615M

Institutional % Held

60.0%

Ownership Breakdown

Net Insider Activity by Month

Martin Marietta Materials Insider Transactions (Last 6 Months)

No insider filings in the last 6 months.

Congressional Trading Activity

See all government trades
DateMemberPartyChamberActionAmount
Jul 24, 2026April McClain DelaneyDHouseP$15,001 - $50,000
Jul 20, 2026April McClain DelaneyDHouseP$1,001 - $15,000