Martin Marietta Materials Ownership & Insider Activity

Martin Marietta Materials Inc

MLMNYSE

$540.41

6.021.13%

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Martin Marietta Materials Ownership & Insider Activity - Benzinga

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

Insiders own 1.3% of shares outstanding. Institutional investors hold 59.3%.

Shares Outstanding

71.019M

Shares Float

63.558M

Insider Shares Owned

952.180K

Insider % Owned

1.3%

Institutional Shares Held

42.148M

Institutional % Held

59.3%

Ownership Breakdown

Net Insider Activity by Month

No insider filings in the last 6 months.

Date	Member	Party	Chamber	Action	Amount
Aug 25, 2026	April McClain Delaney	D	House	Sale	$250,001 - $500,000
Aug 19, 2026	April McClain Delaney	D	House	Purchase	$1,001 - $15,000
Jul 24, 2026	April McClain Delaney	D	House	Purchase	$15,001 - $50,000
Jul 20, 2026	April McClain Delaney	D	House	Purchase	$1,001 - $15,000
Jul 17, 2026	April McClain Delaney	D	House	Purchase	$1,001 - $15,000
May 28, 2026	April McClain Delaney	D	House	Purchase	$1,001 - $15,000
Apr 9, 2026	Josh Gottheimer	D	House	Sale	$15,001 - $50,000
Mar 9, 2026	April McClain Delaney	D	House	Purchase	$1,001 - $15,000
Dec 2, 2025	April McClain Delaney	D	House	Purchase	$1,001 - $15,000
Sep 23, 2025	Val Hoyle	D	House	Sale	$1,001 - $15,000
Aug 1, 2025	April McClain Delaney	D	House	Sale (Partial)	$1,001 - $15,000
Jun 10, 2025	Lisa McClain	R	House	Sale	$1,001 - $15,000
Dec 11, 2024	Lisa McClain	R	House	Purchase	$1,001 - $15,000
Oct 29, 2024	Val Hoyle	D	House	Purchase	$1,001 - $15,000