Martin Marietta Materials, Inc.· MLM

🇺🇸 US · LargeSP500NYSE

Basic Materials Construction Materials Website

Price: $490.64
Day: -0.77%
Mkt Cap: $29.47B
52W Range: $488.74 – $710.97
Volume: 1.15M
Beta: 1.10

D55D FrameworkQuarterly Data

Holdings Analysis

Insider activity, institutional flows, and fund ownership.

Smart Money: 3.5 / 5 (Bullish), from 2 of 3 components
Institutions Q2 2026: 1,093 institutions hold; 477 added, 394 reduced

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Martin Marietta Materials, Inc.

MLM|Basic Materials|Construction Materials

Current price: $491

Smart Money

Dimension 5 of 5

Insider selling pace · Q1 2024

N/A

insufficient history to compare

Seller breadth · Q1 2024

3 sellers

vs 1.0 avg per quarter

Institutional net breadth · Q2 2026

+85

589 adding vs 504 reducing

Institutional ownership · Q2 2026

99.6%

1,093 institutions

Insider Selling Pace

Each quarter's selling vs this stock's own trailing 6-quarter average

Light <0.5xRoutineElevated >1.5xHeavy >3xBuying

Institutional Positions

Institutions adding above the line, reducing below, net as a line

NewIncreasedReducedClosedNet

Largest Institutional Holders, Q2 2026

By reported market value, and how each moved in the quarter

Holder

Change

BLACKROCK, INC.

4.7M

+0.5%

VANGUARD CAPITAL MANAGEMENT LLC

3.9M

+0.6%

VANGUARD PORTFOLIO MANAGEMENT LLC

3.2M

+1.5%

STATE STREET CORP

3.2M

+10.2%

BANK OF AMERICA CORP /DE/

2.4M

+2.3%

FMR LLC

2.2M

-15.6%

ETF & Fund Activity, Q2 2026

How the covering funds split between buying, holding and selling

110

150

125

110 buying150 unchanged125 selling

385 funds held MLM in Q2 2026, holding 22.0M shares between them, up 0.4% on the quarter.

Largest fund holders

SPDR SERIES TRUST242.4K sh

NATIONWIDE MUTUAL FUNDS20.3K sh

Series Portfolios Trust6.3K sh

Notable Insider Transactions, Q1 2024

Largest open-market purchases and sales by value in the last eight quarters

Sale · Aug 8

PEREZ LAREE E

$636.6K

Sale · Mar 5

McCunniff Donald A.

$632.7K

Purchase · Mar 4

Petro Michael J

$249.9K

Insider transactions from SEC Form 4 filings; institutional holdings from quarterly 13F filings, which are reported with a lag and can overlap between filers. 13F: quarterly institutional holdings report · ETF: Exchange-Traded Fund

See the complete picture

The full 5D Framework: Business Quality · Peer Comparison · Valuation · Analyst Sentiment · Smart Money

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Generated September 20, 2026

For educational purposes only. Not financial advice. Data may be delayed or incomplete.

Smart Money Sentiment

MLM Smart Money Sentiment Score

A weighted 1-5 sentiment score across three smart money signals.

Smart Money

3.5/5

Bullish

Weighted across 3 components

Component Breakdown (2 of 3 available)

Insider Activity

40% weight

No data

Institutional Flow

50% weight

+30

Fund Flow

10% weight

Overall Smart Money sentiment of 3.5/5 (Bullish) based on a weighted combination of 2 components. Insider activity uses a relative-baseline comparison against the stock's own history; institutional flow tracks position momentum and 13F share changes; fund flow measures ETF / mutual-fund buying vs selling. Higher scores indicate stronger bullish sentiment from professional investors.Last updated September 19, 2026.

Insider Trading Activity

Insider trading analysis comparing the latest quarter against the stock's own historical baseline.

Insider Selling Pace for MLM

Each quarter's selling vs the stock's own trailing 6-quarter average; 1.0x is typical for this stock. Green triangles mark quarters with insider buying.

No Data

No recent insider signal

Most recent insider filing was Q3 2025.

Notable Recent Transactions, MLM

Top 3 highest-value insider trades from the last 8 quarters

PEREZ LAREE E

Director

Sell

1,038 shares at $613.32

≈6.3% of their stake at the time

Aug 8, 2025$636.63K

McCunniff Donald A.

EVP and Chro

Sell

1,332 shares at $475.00

≈27.4% of their stake at the time

Mar 5, 2025$632.70K

Petro Michael J

SVP - Strategy and Development

Buy

550 shares at $454.37

≈6.1% of their stake after buying

Mar 4, 2025$249.90K

Institutional Ownership Analysis

Institutional ownership analysis with position momentum, 13F share flow, and ownership percentage trends.

Institutional Positions for MLM

Institutions adding (new + increased) above zero, reducing (reduced + closed) below, net as a line

New Increased Reduced Closed Net (adding − reducing)

Bullish Signal

Institutions accumulating in Q2 2026

99.6% institutional ownership

Balanced activity: 589 adding vs 504 reducing

13F shares increased by 2.4%, a notable change

+85

Net breadth

589 adding vs 504 reducing

Balanced

1.17

Add / reduce ratio

in Q2 2026

New − closed

112 initiated, 110 exited

8 of 10

Top holders adding

largest holders with a known change

Position Changes

Q2 2026: how are institutions adjusting their positions?

+589 growing-504 shrinkingNet: +85

112

477

394

110

New (112)

Increased (477)

Reduced (394)

Closed (110)

Top Institutional Holders, MLM

Largest 8 institutional positions by ownership percentage as of Q2 2026

BLACKROCK, INC.

4.7M

$2.7B

Ownership

7.81%

+0.5%

VANGUARD CAPITAL MANAGEMENT LLC

3.9M

$2.3B

Ownership

6.54%

+0.6%

VANGUARD PORTFOLIO MANAGEMENT LLC

3.2M

$1.8B

Ownership

5.32%

+1.5%

STATE STREET CORP

3.2M

$1.8B

Ownership

5.26%

+10.2%

BANK OF AMERICA CORP /DE/

2.4M

$1.4B

Ownership

4.07%

+2.3%

FMR LLC

2.2M

$1.3B

Ownership

3.65%

-15.6%

PRINCIPAL FINANCIAL GROUP INC

2.1M

$1.2B

Ownership

3.52%

+1.4%

ARISTOTLE CAPITAL MANAGEMENT, LLC

1.8M

$1.1B

Ownership

3.05%

-6.0%

ETF and Mutual Fund Holdings

ETF and mutual fund activity breakdown showing buying vs selling funds, top fund holders, and detailed holdings.

Fund Activity

Q2 2026: 385 ETFs and mutual funds reporting

110 buying125 sellingNet: -15

110

150

125

Buying (110)

Unchanged (150)

Selling (125)

In total, funds bought 1.0M shares and sold 930.6K this quarter. Each fund counts once in the bar above, whatever the size of its move.

Neutral

Mixed fund activity in Q2 2026

385 ETFs and mutual funds reporting

110 buying vs 125 selling (balanced)

Top Fund Holders, MLM

Largest 8 ETF and mutual fund positions by shares held, each fund's latest filing

SPDR SERIES TRUST

242.4K

Weight

1.20%

Jul 31, 2026No change

NATIONWIDE MUTUAL FUNDS

20.3K

Weight

0.00%

Jul 31, 2026Decreased

Series Portfolios Trust

6.3K

Weight

3.98%

Jul 31, 2026No change

GLENMEDE FUND INC

4.4K

Weight

0.27%

Jul 31, 2026Decreased

Listed Funds Trust

1.6K

Weight

27.15%

Jul 31, 2026No change

TIAA SEPARATE ACCOUNT VA 1

1.2K

Weight

0.72%

Jun 30, 2026Increased

Principal Exchange-Traded Funds

1.1K

Weight

0.00%

Jun 30, 2026No change

VIRTUS OPPORTUNITIES TRUST

1.1K

Weight

0.00%

Jun 30, 2026No change

Martin Marietta Materials, Inc.· MLM

Holdings Analysis

Insider Trading Activity

1.3Transaction History53Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings153Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights

Search stocks

Holdings Analysis

Insider Trading Activity

1.3Transaction History53Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings153Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights