Martin Marietta Materials, Inc. (MLM) Insider Trading

Last 12 months

No open-market buying or selling by insiders.

The last open-market buy by an executive or director was in Mar 2025.

Net open-market

0 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

0 / 0

executives and directors

Last open-market buy

Mar 2025

Mar 4, 2025

Get an email when MLM's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 8, 2025	Laree E Perez Director	SoldNo plan	1,038	$613.32	$637k	6.3%	Form 4
Mar 5, 2025	Donald A. McCunniff EVP and CHRO	SoldNo plan	1,332	$475.00	$633k	27%	Form 4
Mar 4, 2025	Michael J Petro SVP - Strategy and Development	Bought	550	$454.37	$250k	6.5%	Form 4

Aug 8, 2025No plan
Laree E Perez
Director · sold 1,038 at $613.32
$637k
6.3% of stake
Mar 5, 2025No plan
Donald A. McCunniff
EVP and CHRO · sold 1,332 at $475.00
$633k
27% of stake
Mar 4, 2025
Michael J Petro
SVP - Strategy and Development · bought 550 at $454.37
$250k
6.5% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch MLM, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Related stocks: Mining & Quarrying of Nonmetallic Minerals (No Fuels)

VMCVulcan Materials Company

KNFKnife River Corporation

MDUMDU Resources Group, Inc.

HLHecla Mining Company

CMPCompass Minerals International Inc.

Spot a number that looks wrong? Check it in MLM's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

2 of 2 free stocks used today

Keep analysing MLM

Create a free account and get 14 days of Premium: every stock and every tool.

Unlimited stocksQuality, fair value and dividends for 10,000+ stocks
Stock screenerFilter on quality, valuation and dividend safety
Portfolio trackerReal return, dividend calendar and portfolio quality
Editable DCFChange the assumptions and watch fair value move
Compare side by sideUp to 10 stocks in one table
Unlimited alertsPrice, P/E, Quality Score and yield

No card. Moves to Free after, unless you upgrade.

Already have an account?

Or come back tomorrow. Stocks on your watchlist are always free to view.