NYSE:MLM

Martin Marietta Materials Stock Insider Trading

Basic Materials > Construction Materials

Buy MLM

*Your capital is at risk

$583.15

+6.22 (+1.08%)

At Close: Jun 03, 2026

Martin Marietta Materials Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 43.18. In total, the insiders bought 104.22K and sold 21.66K MLM shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	43.18
● Buy	104.22K shares
● Sell	21.66K shares
76% Buy Activity Negligible or No Correlation
Buy Signal Medium Confidence May 01, 2026 Analysis Breakdown: Supported by a positive Insider Power Score of 43.18. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (76% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
May 29, 2026 Buy	Common Stock A-Award	Pike Thomas Director	Director	59 Value: $34.3K
May 29, 2026 Buy	Common Stock A-Award	Wajsgras David C Director	Director	69 Value: $40.1K
May 29, 2026 Buy	Common Stock A-Award	Lyons Martin J Director	Director	61 Value: $35.5K
May 14, 2026 Buy	Common Stock A-Award	Ables Dorothy M Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Delly Gayla J Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Foxx Anthony R Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Wajsgras David C Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Slager Donald W Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Pike Thomas Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Perez Laree E Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock A-Award	Mack Mary T Director	Director	313 Value: $180.0K
May 14, 2026 Buy	Common Stock	Delly Gayla J Director	Director	0 Value: $0
May 14, 2026 Buy	Common Stock	Lyons Martin J Director	Director	0 Value: $0
May 14, 2026 Buy	Common Stock A-Award	Lyons Martin J Director	Director	313 Value: $180.0K
May 01, 2026 Buy	Common Stock A-Award	Samborski Christopher William EVP, COO	C-Suite Officer	8 101 Value: $4.98M
May 01, 2026 Buy	Common Stock	Samborski Christopher William EVP, COO	C-Suite Officer	0 Value: $0
Mar 01, 2026 Buy	Common Stock A-Award	Schoen George Frederick EVP, GC And Corp. Secretary	Officer	23 673 Value: $13.8M
Mar 01, 2026 Buy	Common Stock A-Award	Petro Michael J SVP And CFO	C-Suite Officer	2 960 Value: $1.73M
Mar 01, 2026 Buy	Common Stock A-Award	Nye C Howard Chairman, Pres & CEO	CEO / President	5 919 Value: $3.45M
Mar 01, 2026 Buy	Common Stock A-Award	Mccunniff Donald A. EVP And Chro	Officer	2 960 Value: $1.73M
Mar 01, 2026 Buy	Common Stock	Schoen George Frederick EVP, GC And Corp. Secretary	Officer	0 Value: $0
Feb 27, 2026 Buy	Common Stock A-Award	Wajsgras David C Director	Director	56 Value: $37.9K
Feb 27, 2026 Buy	Common Stock A-Award	Pike Thomas Director	Director	47 Value: $31.8K
Feb 27, 2026 Buy	Common Stock A-Award	Koraleski John J Director	Director	69 Value: $46.7K
Feb 24, 2026 Sell	Common Stock F-InKind	Flynn Jason Paul SVP And Cio	Officer	30 Value: $20.9K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT MARTIN MARIETTA MATERIALS INC

Martin Marietta Materials, Inc., a natural resource-based building materials company, supplies aggregates and heavy-side building materials to the construction industry in the United States and internationally. It offers crushed stone, sand, and gravel products; ready mixed concrete and asphalt; paving products and services; and Portland and specialty cement for use in the infrastructure projects, and nonresidential and residential construction m...

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