$MLM

$503.69 -$0.23 (0.05%) Close

$MLM Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 60.1M shares outstanding

Who owns MLM?

By type of holder

Institutions 98.5% Insiders 1.5% Everyone else 0.0%

Concentration Top 10 holders own 59.9%

LNA Holding SRL 18.2% · BlackRock, Inc. 7.8%

Institutional ownership

98.5%

+1.3 pts vs last qtr

Institutional holders

1,071

-6 vs last qtr

Net shares bought

+794.0K

by institutions in Q2 2026

New / sold out

109 / 115

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Tci Fund Management LTD NEW +1.3M
Norges Bank NEW +557.1K

Biggest sellers in Q2 2026

FMR LLC −415.4K
Jpmorgan Chase & Co −393.3K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Martin Marietta Materials, Inc. in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−5.1%

−0.58% a year

Each share's claim on the business

+5.4%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$1.81B vs $384M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years83% 3–5 years4% 1–3 years5% Under 1 year8%

Quarterly turnover

7.5%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting MLM on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	4.7M	7.81%	+6.7K (+0.1%)	≤2021	0.0%
Shares held by quarter Peak holding4.7M (Q2'26) Change over 8 quarters+636.3K Share of the company7.810% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	3.9M	6.54%	+12.3K (+0.3%)	≤2021	0.1%
Shares held by quarter Peak holding3.9M (Q2'26) Change over 8 quarters+3.9M Share of the company6.540% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

4.7M

% of company

7.81%

Change vs last qtr

+6.7K (+0.1%)

Held since

≤2021

Vanguard Capital Management LLC

3.9M

% of company

6.54%

Change vs last qtr

+12.3K (+0.3%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Martin Marietta Materials, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MLM on Form N-PORT; together they hold 40.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$1.1B	1.9M	3.18%	0.05%	June 30, 2026
V5 Vanguard 500 Index Fund Vanguard Index Funds	$897M	1.6M	2.59%	0.05%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$1.1B

% of company

3.18%

% of the fund

0.05%

As of

June 30, 2026

Vanguard 500 Index Fund

Vanguard Index Funds

Position value

$897M

% of company

2.59%

% of the fund

0.05%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Martin Marietta Materials, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
LH LNA Holding SRL 5%+ holder 13D · 15.4%	11.0M	18.24%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company18.240% Disclosed stake13D · 15.4% View the 13D/G filing →
NC Nye C Howard Insider	246.4K	0.41%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.410% Nye C Howard's insider activity →

LNA Holding SRL

5%+ holder13D · 15.4%

11.0M

% of company

18.24%

Change vs last qtr

—

Held since

—

Nye C Howard

Insider

246.4K

% of company

0.41%

Change vs last qtr

—

Held since

—

22 more holders behind a free account

See every insider and 5%+ holder of Martin Marietta Materials, Inc..

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